chore: update dependencies

* add new rotation axis
 * resize image if necessary
 * add debug logs

.gitignore

@@ -285,3 +285,5 @@ local.properties
 ./rc-*
 rc-simulator
 rc-simulator.*
+
+build/

build-docker.sh

@@ -26,11 +26,12 @@ image_build(){
 
 
   printf "\n\nBuild go binary %s\n\n" "${BINARY}.${binary_suffix}"
-  CGO_ENABLED=0 GOOS=${GOOS} GOARCH=${GOARCH} GOARM=${GOARM} go build -mod vendor -a ${GOTAGS} -o "${BINARY}.${binary_suffix}" ./cmd/${BINARY}/
+  mkdir -p build
+  CGO_ENABLED=0 GOOS=${GOOS} GOARCH=${GOARCH} GOARM=${GOARM} go build -mod vendor -a ${GOTAGS} -o "build/${BINARY}.${binary_suffix}" ./cmd/${BINARY}/
 
   buildah --os "$GOOS" --arch "$GOARCH" $VARIANT  --name "$containerName" from gcr.io/distroless/static
   buildah config --user 1234 "$containerName"
-  buildah copy "$containerName" "${BINARY}.${binary_suffix}" /go/bin/$BINARY
+  buildah copy "$containerName" "build/${BINARY}.${binary_suffix}" /go/bin/$BINARY
   buildah config --entrypoint '["/go/bin/'$BINARY'"]' "${containerName}"
 
   buildah commit --rm --manifest $IMAGE_NAME "${containerName}" "${containerName}"

cmd/rc-simulator/rc-simultator.go

@@ -23,7 +23,6 @@ func main() {
 	var mqttBroker, username, password, clientId, topicFrame, topicSteering, topicThrottle string
 	var topicCtrlSteering, topicCtrlThrottle string
 	var address string
-	var debug bool
 
 	mqttQos := cli.InitIntFlag("MQTT_QOS", 0)
 	_, mqttRetain := os.LookupEnv("MQTT_RETAIN")
@@ -36,7 +35,6 @@ func main() {
 	flag.StringVar(&topicCtrlSteering, "topic-steering-ctrl", os.Getenv("MQTT_TOPIC_STEERING_CTRL"), "Mqtt topic to send steering instructions, use MQTT_TOPIC_STEERING_CTRL if args not set")
 	flag.StringVar(&topicCtrlThrottle, "topic-throttle-ctrl", os.Getenv("MQTT_TOPIC_THROTTLE_CTRL"), "Mqtt topic to send throttle instructions, use MQTT_TOPIC_THROTTLE_CTRL if args not set")
 	flag.StringVar(&address, "simulator-address", "127.0.0.1:9091", "Simulator address")
-	flag.BoolVar(&debug, "debug", false, "Debug logs")
 
 	var carName, carStyle, carColor string
 	var carFontSize int
@@ -50,15 +48,15 @@ func main() {
 	flag.StringVar(&carColor, "car-color", "0,0,0", "Color car as rgb value")
 	flag.IntVar(&carFontSize, "car-font-size", 0, "Car font size")
 
-	var racerName, racerBio, racerCountry,  racerGuid string
+	var racerName, racerBio, racerCountry, racerGuid string
 	flag.StringVar(&racerName, "racer-name", "", "")
-	flag.StringVar(&racerBio, "racer-bio",      "", "")
-	flag.StringVar(&racerCountry, "racer-country",   "", "")
-	flag.StringVar(&racerGuid, "racer-guid",     "", "")
+	flag.StringVar(&racerBio, "racer-bio", "", "")
+	flag.StringVar(&racerCountry, "racer-country", "", "")
+	flag.StringVar(&racerGuid, "racer-guid", "", "")
 
 	var cameraFov, cameraImgW, cameraImgH, cameraImgD int
 	var cameraFishEyeX, cameraFishEyeY float64
-	var cameraOffsetX, cameraOffsetY, cameraOffsetZ, cameraRotX float64
+	var cameraOffsetX, cameraOffsetY, cameraOffsetZ, cameraRotX, cameraRotY, cameraRotZ float64
 	var cameraImgEnc string
 	flag.IntVar(&cameraFov, "camera-fov", 90, "")
 	flag.Float64Var(&cameraFishEyeX, "camera-fish-eye-x", 0.4, "")
@@ -70,20 +68,21 @@ func main() {
 	flag.Float64Var(&cameraOffsetX, "camera-offset-x", 0, "moves camera left/right")
 	flag.Float64Var(&cameraOffsetY, "camera-offset-y", 1.120395, "moves camera up/down")
 	flag.Float64Var(&cameraOffsetZ, "camera-offset-z", 0.5528488, "moves camera forward/back")
-	flag.Float64Var(&cameraRotX, "camera-rot-x", 15.0, "rotate the camera")
+	flag.Float64Var(&cameraRotX, "camera-rot-x", 15.0, "rotate the camera around x-axis")
+	flag.Float64Var(&cameraRotY, "camera-rot-y", 0.0, "rotate the camera around y-axis")
+	flag.Float64Var(&cameraRotZ, "camera-rot-z", 0.0, "rotate the camera around z-axis")
+
+	logLevel := zap.LevelFlag("log", zap.InfoLevel, "log level")
 
 	flag.Parse()
+
 	if len(os.Args) <= 1 {
 		flag.PrintDefaults()
 		os.Exit(1)
 	}
 
 	config := zap.NewDevelopmentConfig()
-	if debug {
-		config.Level = zap.NewAtomicLevelAt(zap.DebugLevel)
-	} else {
-		config.Level = zap.NewAtomicLevelAt(zap.InfoLevel)
-	}
+	config.Level = zap.NewAtomicLevelAt(*logLevel)
 	lgr, err := config.Build()
 	if err != nil {
 		log.Fatalf("unable to init logger: %v", err)
@@ -123,17 +122,22 @@ func main() {
 		MsgType:  simulator.MsgTypeCameraConfig,
 		Fov:      strconv.Itoa(cameraFov),
 		FishEyeX: fmt.Sprintf("%.2f", cameraFishEyeX),
-		FishEyeY: fmt.Sprintf("%.2f",cameraFishEyeY),
+		FishEyeY: fmt.Sprintf("%.2f", cameraFishEyeY),
 		ImgW:     strconv.Itoa(cameraImgW),
 		ImgH:     strconv.Itoa(cameraImgH),
 		ImgD:     strconv.Itoa(cameraImgD),
 		ImgEnc:   simulator.CameraImageEnc(cameraImgEnc),
-		OffsetX:  fmt.Sprintf("%.2f",cameraOffsetX),
-		OffsetY: fmt.Sprintf("%.2f", cameraOffsetY),
-		OffsetZ: fmt.Sprintf("%.2f", cameraOffsetZ),
-		RotX:    fmt.Sprintf("%.2f", cameraRotX),
+		OffsetX:  fmt.Sprintf("%.2f", cameraOffsetX),
+		OffsetY:  fmt.Sprintf("%.2f", cameraOffsetY),
+		OffsetZ:  fmt.Sprintf("%.2f", cameraOffsetZ),
+		RotX:     fmt.Sprintf("%.2f", cameraRotX),
+		RotY:     fmt.Sprintf("%.2f", cameraRotY),
+		RotZ:     fmt.Sprintf("%.2f", cameraRotZ),
+	}
+	gtw, err := gateway.New(address, &carConfig, &racer, &camera)
+	if err != nil {
+		zap.S().Fatalf("unable to init gateway: %v", err)
 	}
-	gtw := gateway.New(address, &carConfig, &racer, &camera)
 	defer gtw.Stop()
 
 	msgPub := events.NewMsgPublisher(

go.mod

@@ -4,19 +4,19 @@ go 1.17
 
 require (
 	github.com/avast/retry-go v3.0.0+incompatible
-	github.com/cyrilix/robocar-base v0.1.4
-	github.com/cyrilix/robocar-protobuf/go v1.0.3
+	github.com/cyrilix/robocar-base v0.1.6
+	github.com/cyrilix/robocar-protobuf/go v1.0.4
+	github.com/disintegration/imaging v1.6.2
 	github.com/eclipse/paho.mqtt.golang v1.3.5
 	github.com/golang/protobuf v1.5.2
-	github.com/sirupsen/logrus v1.8.1
 	go.uber.org/zap v1.19.1
+	google.golang.org/protobuf v1.27.1
 )
 
 require (
 	github.com/gorilla/websocket v1.4.2 // indirect
 	go.uber.org/atomic v1.7.0 // indirect
 	go.uber.org/multierr v1.6.0 // indirect
+	golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8 // indirect
 	golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 // indirect
-	golang.org/x/sys v0.0.0-20210510120138-977fb7262007 // indirect
-	google.golang.org/protobuf v1.26.0 // indirect
 )

go.sum

@@ -2,32 +2,27 @@ cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMT
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
 github.com/Microsoft/go-winio v0.4.11/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA=
 github.com/Microsoft/hcsshim v0.8.6/go.mod h1:Op3hHsoHPAvb6lceZHDtd9OkTew38wNoXnJs8iY7rUg=
-github.com/avast/retry-go v2.6.0+incompatible h1:FelcMrm7Bxacr1/RM8+/eqkDkmVN7tjlsy51dOzB3LI=
-github.com/avast/retry-go v2.6.0+incompatible/go.mod h1:XtSnn+n/sHqQIpZ10K1qAevBhOOCWBLXXy3hyiqqBrY=
 github.com/avast/retry-go v3.0.0+incompatible h1:4SOWQ7Qs+oroOTQOYnAHqelpCO0biHSxpiH9JdtuBj0=
 github.com/avast/retry-go v3.0.0+incompatible/go.mod h1:XtSnn+n/sHqQIpZ10K1qAevBhOOCWBLXXy3hyiqqBrY=
+github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
 github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/cenkalti/backoff v2.2.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/containerd/containerd v1.4.1/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
 github.com/containerd/continuity v0.0.0-20190426062206-aaeac12a7ffc/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
-github.com/cyrilix/robocar-base v0.1.2 h1:bhT5ohhviodCOd5usy013ctwu7ko+IfyDXnYHg7lJ8I=
-github.com/cyrilix/robocar-base v0.1.2/go.mod h1:G2SiYNUDAIv+65XWpiHnCXj7Jz2V6pOBLaIrcasGkww=
-github.com/cyrilix/robocar-base v0.1.4 h1:nfnjRwAcCfS7xGu6tW9rZhmc/HZIsuDJX5NFhgX5dWE=
-github.com/cyrilix/robocar-base v0.1.4/go.mod h1:Tt04UmbGBiQtU0Cn3wFD0q7XoyokTwIlWYQxThKI+04=
-github.com/cyrilix/robocar-protobuf/go v1.0.2 h1:eWwu7T07uvABh74bWOJa77alUs6VaWNEPd7Zezua2Cs=
-github.com/cyrilix/robocar-protobuf/go v1.0.2/go.mod h1:xj7H/a7qpvXgmW1983Fjd143Mz9Yt0C6RCxvB8M6pEM=
-github.com/cyrilix/robocar-protobuf/go v1.0.3 h1:iPHw2+7FVXG2C4+Th1m11hQ+2RpAQzlxKhc5M7XOa6Q=
-github.com/cyrilix/robocar-protobuf/go v1.0.3/go.mod h1:xb95cK07lYXnKcHZKnGafmAgYRrqZWZgV9LMiJAp+gE=
+github.com/cyrilix/robocar-base v0.1.6 h1:VVcSZD8DPsha3XDLxRBMvtcd6uC8CcIjqbxG482dxvo=
+github.com/cyrilix/robocar-base v0.1.6/go.mod h1:m5ov/7hpRHi0yMp2prKafL6UEsM2O71Uea85WR0/jjI=
+github.com/cyrilix/robocar-protobuf/go v1.0.4 h1:XTolFYbiKw4gQ2l+z/LMZkLrmAUMzlHcQBzp/czlANo=
+github.com/cyrilix/robocar-protobuf/go v1.0.4/go.mod h1:1fyGMVm4ZodfYRrbWCEQgtvKyvrhyTBe5zA7/Qeh/H0=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/disintegration/imaging v1.6.2 h1:w1LecBlG2Lnp8B3jk5zSuNqd7b4DXhcjwek1ei82L+c=
+github.com/disintegration/imaging v1.6.2/go.mod h1:44/5580QXChDfwIclfc/PCwrr44amcmDAg8hxG0Ewe4=
 github.com/docker/distribution v2.7.1-0.20190205005809-0d3efadf0154+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
 github.com/docker/docker v17.12.0-ce-rc1.0.20200916142827-bd33bbf0497b+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
 github.com/docker/go-units v0.3.3/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
-github.com/eclipse/paho.mqtt.golang v1.3.1 h1:6F5FYb1hxVSZS+p0ji5xBQamc5ltOolTYRy5R15uVmI=
-github.com/eclipse/paho.mqtt.golang v1.3.1/go.mod h1:eTzb4gxwwyWpqBUHGQZ4ABAV7+Jgm1PklsYT/eo8Hcc=
 github.com/eclipse/paho.mqtt.golang v1.3.5 h1:sWtmgNxYM9P2sP+xEItMozsR3w0cqZFlqnNN1bdl41Y=
 github.com/eclipse/paho.mqtt.golang v1.3.5/go.mod h1:eTzb4gxwwyWpqBUHGQZ4ABAV7+Jgm1PklsYT/eo8Hcc=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
@@ -44,21 +39,11 @@ github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfU
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
-github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
-github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
-github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
-github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
-github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
-github.com/golang/protobuf v1.4.3 h1:JjCZWpVbqXDqFVmTfYWEVTMIYrL/NPdPSCHPJ0T/raM=
-github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
 github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
-github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
-github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
-github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
-github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
@@ -70,10 +55,8 @@ github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpO
 github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
-github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
-github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/leodido/go-urn v1.2.0/go.mod h1:+8+nEpDfqqsY+g338gtMEUOtuK+4dEMhiQEgxpxOKII=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
@@ -88,22 +71,20 @@ github.com/opencontainers/image-spec v1.0.1/go.mod h1:BtxoFyWECRxE4U/7sNtV5W15zM
 github.com/opencontainers/runc v0.1.1/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59PVA73FjuZG0U=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
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-github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
-github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
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-github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
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 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/testcontainers/testcontainers-go v0.9.0/go.mod h1:b22BFXhRbg4PJmeMVWh6ftqjyZHgiIl3w274e9r3C2E=
 github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw=
@@ -111,6 +92,7 @@ github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLY
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.uber.org/atomic v1.7.0 h1:ADUqmZGgLDDfbSL9ZmPxKTybcoEYHgpYfELNoN+7hsw=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
+go.uber.org/goleak v1.1.11-0.20210813005559-691160354723 h1:sHOAIxRGBp443oHZIPB+HsUGaksVCXVQENPxwTfQdH4=
 go.uber.org/goleak v1.1.11-0.20210813005559-691160354723/go.mod h1:cwTWslyiVhfpKIDGSZEM2HlOvcqm+tG4zioyIeLoqMQ=
 go.uber.org/multierr v1.6.0 h1:y6IPFStTAIT5Ytl7/XYmHvzXQ7S3g/IeZW9hyZ5thw4=
 go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
@@ -119,7 +101,8 @@ go.uber.org/zap v1.19.1/go.mod h1:j3DNczoxDZroyBnOT1L/Q79cfUMGZxlv/9dzN7SM1rI=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8 h1:hVwzHzIUGRjiF7EcUjqNxk3NCfkPxbDKRdnNE1Rpg0U=
+golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
@@ -128,10 +111,7 @@ golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73r
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0 h1:Jcxah/M+oLZ/R4/z5RzfPzGbPXnVDPkEDtf2JnuxN+U=
 golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
-golang.org/x/net v0.0.0-20200904194848-62affa334b73 h1:MXfv8rhZWmFeqX3GNZRsd6vOLoaCHjYEX3qkRo3YBUA=
-golang.org/x/net v0.0.0-20200904194848-62affa334b73/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 h1:4nGaVu0QrbjT/AK2PRLuQfQuh6DJve+pELhqTdAj3x0=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
@@ -145,11 +125,9 @@ golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd h1:xhmwyvizuTgC2qz7ZlMluP20uW+C3Rm0FD/WLDX8884=
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210510120138-977fb7262007 h1:gG67DSER+11cZvqIMb8S8bt0vZtiN6xWYARwirrOSfE=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -164,33 +142,27 @@ golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtn
 golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
-google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
-google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
-google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
-google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
-google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
-google.golang.org/protobuf v1.23.0 h1:4MY060fB1DLGMB/7MBTLnwQUY6+F09GEiz6SsrNqyzM=
-google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
-google.golang.org/protobuf v1.26.0 h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
+google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gotest.tools v0.0.0-20181223230014-1083505acf35/go.mod h1:R//lfYlUuTOTfblYI3lGoAAAebUdzjvbmQsuB7Ykd90=
 honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

pkg/events/events.go

@@ -4,10 +4,10 @@ import (
 	"fmt"
 	"github.com/cyrilix/robocar-simulator/pkg/gateway"
 	mqtt "github.com/eclipse/paho.mqtt.golang"
-	"github.com/golang/protobuf/proto"
+	"go.uber.org/zap"
+	"google.golang.org/protobuf/proto"
 	"sync"
 	"time"
-	"go.uber.org/zap"
 )
 
 func NewMsgPublisher(srcEvents gateway.SimulatorSource, p Publisher, topicFrame, topicSteering, topicThrottle string) *MsgPublisher {
@@ -113,6 +113,7 @@ func (m *MsgPublisher) listenFrame() {
 		msg := <-msgChan
 		if msg == nil {
 			// channel closed
+			logr.Info("received empty message, channel closed")
 			break
 		}
 		logr.Debugf("new frame %v", msg.Id)

pkg/events/events_test.go

@@ -3,8 +3,8 @@ package events
 import (
 	"fmt"
 	"github.com/cyrilix/robocar-protobuf/go/events"
-	"github.com/golang/protobuf/proto"
 	"github.com/golang/protobuf/ptypes/timestamp"
+	"google.golang.org/protobuf/proto"
 	"testing"
 	"time"
 )

pkg/gateway/controls_test.go

@@ -40,7 +40,7 @@ func TestGateway_Start(t *testing.T) {
 		OffsetZ:  "0",
 		RotX:     "0",
 	}
-	gw := New(simulatorMock.Addr(),
+	gw, err := New(simulatorMock.Addr(),
 		&carConfig,
 		&simulator.RacerBioMsg{},
 		&camConfig,
@@ -130,10 +130,13 @@ func TestGateway_WriteSteering(t *testing.T) {
 		}
 	}()
 
-	gw := New(simulatorMock.Addr(),
+	gw, err := New(simulatorMock.Addr(),
 		&simulator.CarConfigMsg{MsgType: simulator.MsgTypeCarConfig},
 		&simulator.RacerBioMsg{},
-		&simulator.CamConfigMsg{})
+		&simulator.CamConfigMsg{
+		ImgH: "128",
+		ImgW: "160",
+		})
 	if err != nil {
 		t.Fatalf("unable to init simulator gateway: %v", err)
 	}
@@ -254,10 +257,16 @@ func TestGateway_WriteThrottle(t *testing.T) {
 		}
 	}()
 
-	gw := New(simulatorMock.Addr(), &simulator.CarConfigMsg{MsgType: simulator.MsgTypeCarConfig},
+	gw, err := New(simulatorMock.Addr(), &simulator.CarConfigMsg{MsgType: simulator.MsgTypeCarConfig},
 		&simulator.RacerBioMsg{},
-		&simulator.CamConfigMsg{})
+		&simulator.CamConfigMsg{
+			ImgH: "128",
+			ImgW: "160",
+		})
 
+	if err != nil {
+		t.Fatalf("unable to init simulator gateway: %v", err)
+	}
 	//go gw.Start()
 
 	//<- simulatorMock.NotifyCar()

pkg/gateway/gateway.go

@@ -2,15 +2,20 @@ package gateway
 
 import (
 	"bufio"
+	"bytes"
 	"encoding/json"
 	"fmt"
 	"github.com/avast/retry-go"
 	"github.com/cyrilix/robocar-protobuf/go/events"
 	"github.com/cyrilix/robocar-simulator/pkg/simulator"
+	"github.com/disintegration/imaging"
 	"github.com/golang/protobuf/ptypes/timestamp"
 	"go.uber.org/zap"
+	"image"
+	"image/jpeg"
 	"io"
 	"net"
+	"strconv"
 	"sync"
 	"time"
 )
@@ -31,10 +36,19 @@ type ThrottleSource interface {
 	SubscribeThrottle() <-chan *events.ThrottleMessage
 }
 
-func New(addressSimulator string, car *simulator.CarConfigMsg, racer *simulator.RacerBioMsg, camera *simulator.CamConfigMsg) *Gateway {
+func New(addressSimulator string, car *simulator.CarConfigMsg, racer *simulator.RacerBioMsg, camera *simulator.CamConfigMsg) (*Gateway, error) {
 	l := zap.S().With("simulator", addressSimulator)
 	l.Info("run gateway from simulator")
 
+	imgHeight, err := strconv.Atoi(camera.ImgH)
+	if err != nil {
+		return nil, fmt.Errorf("invalid camera configuration, height should be a number: %w", err)
+	}
+	imgWidth, err := strconv.Atoi(camera.ImgW)
+	if err != nil {
+		return nil, fmt.Errorf("invalid camera configuration, width should be a number: %w", err)
+	}
+
 	return &Gateway{
 		address:              addressSimulator,
 		log:                  l,
@@ -46,9 +60,11 @@ func New(addressSimulator string, car *simulator.CarConfigMsg, racer *simulator.
 		racerSubscribers:     make(map[chan *simulator.Msg]interface{}),
 		cameraSubscribers:    make(map[chan *simulator.Msg]interface{}),
 		carConfig:            car,
+		imgWidth:             imgWidth,
+		imgHeight:            imgHeight,
 		racer:                racer,
 		cameraConfig:         camera,
-	}
+	}, nil
 }
 
 // Gateway is Simulator interface to events gateway frames into events topicFrame
@@ -76,34 +92,46 @@ type Gateway struct {
 	cameraSubscribers    map[chan *simulator.Msg]interface{}
 
 	carConfig    *simulator.CarConfigMsg
+	imgHeight    int
+	imgWidth     int
 	racer        *simulator.RacerBioMsg
 	cameraConfig *simulator.CamConfigMsg
+
 }
 
 func (g *Gateway) Start() error {
 	g.log.Info("connect to simulator")
 	g.cancel = make(chan interface{})
-	msgChan := g.subscribeTelemetryEvents()
 
 	go g.run()
 
+
 	err := g.writeRacerConfig()
 	if err != nil {
 		return fmt.Errorf("unable to configure racer to server: %v", err)
 	}
-	err = g.writeCarConfig()
-	if err != nil {
-		return fmt.Errorf("unable to configure car to server: %v", err)
-	}
+
 	err = g.writeCameraConfig()
 	if err != nil {
 		return fmt.Errorf("unable to configure camera to server: %v", err)
 	}
 
+
+	err = g.writeCarConfig()
+	if err != nil {
+		return fmt.Errorf("unable to configure car to server: %v", err)
+	}
+
+	msgChan := g.subscribeTelemetryEvents()
 	for {
 		select {
 		case msg := <-msgChan:
-			fr := g.publishFrame(msg)
+			g.log.Debug("try to publish frame")
+			fr, err := g.publishFrame(msg)
+			if err != nil {
+				zap.S().Errorf("unable to publish frame, ignore event %v: %v", msg, err)
+			}
+			g.log.Debugf("frame published: %v", fr)
 			go g.publishInputSteering(msg, fr)
 			go g.publishInputThrottle(msg, fr)
 		case <-g.cancel:
@@ -195,12 +223,20 @@ func (g *Gateway) listen() error {
 		err = json.Unmarshal(rawLine, &msg)
 		if err != nil {
 			g.log.Errorf("unable to unmarshal simulator msg '%v': %v", string(rawLine), err)
+			continue
 		}
 
+		g.log.Debugf("new message of type %v", string(msg.MsgType))
 		switch msg.MsgType {
+		case "":
+			g.log.Debug("ping")
 		case simulator.MsgTypeTelemetry:
 			g.broadcastTelemetryMsg(rawLine)
 		case simulator.MsgTypeCarLoaded:
+			g.log.Debugf("car loaded: %v",string(rawLine))
+			if err := g.writeCarConfig(); err != nil{
+				zap.S().Errorf("unable to send car config: %v", err)
+			}
 			g.broadcastCarMsg(rawLine)
 		case simulator.MsgTypeRacerInfo:
 			g.broadcastRacerMsg(rawLine)
@@ -211,50 +247,55 @@ func (g *Gateway) listen() error {
 }
 
 func (g *Gateway) broadcastTelemetryMsg(rawLine []byte) {
+	var tMsg simulator.TelemetryMsg
+	err := json.Unmarshal(rawLine, &tMsg)
+	if err != nil {
+		g.log.Errorf("unable to unmarshal telemetry simulator msg '%v': %v", string(rawLine), err)
+		return
+	}
+	g.log.Debugf("broadcast %d telemetry'", len(g.telemetrySubscribers))
 	for c := range g.telemetrySubscribers {
-
-		var tMsg simulator.TelemetryMsg
-		err := json.Unmarshal(rawLine, &tMsg)
-		if err != nil {
-			g.log.Errorf("unable to unmarshal telemetry simulator msg '%v': %v", string(rawLine), err)
-		}
+		g.log.Debugf("broadcast telemetry ")
 		c <- &tMsg
 	}
 }
 
 func (g *Gateway) broadcastCarMsg(rawLine []byte) {
+	var tMsg simulator.Msg
+	err := json.Unmarshal(rawLine, &tMsg)
+	if err != nil {
+		g.log.Errorf("unable to unmarshal car simulator msg '%v': %v", string(rawLine), err)
+		return
+	}
 	for c := range g.carSubscribers {
-		var tMsg simulator.Msg
-		err := json.Unmarshal(rawLine, &tMsg)
-		if err != nil {
-			g.log.Errorf("unable to unmarshal car simulator msg '%v': %v", string(rawLine), err)
-		}
 		c <- &tMsg
 	}
 }
 
 func (g *Gateway) broadcastRacerMsg(rawLine []byte) {
+	var tMsg simulator.Msg
+	err := json.Unmarshal(rawLine, &tMsg)
+	if err != nil {
+		g.log.Errorf("unable to unmarshal racer simulator msg '%v': %v", string(rawLine), err)
+		return
+	}
 	for c := range g.racerSubscribers {
-		var tMsg simulator.Msg
-		err := json.Unmarshal(rawLine, &tMsg)
-		if err != nil {
-			g.log.Errorf("unable to unmarshal racer simulator msg '%v': %v", string(rawLine), err)
-		}
 		c <- &tMsg
 	}
 }
 func (g *Gateway) broadcastCameraMsg(rawLine []byte) {
+	var tMsg simulator.Msg
+	err := json.Unmarshal(rawLine, &tMsg)
+	if err != nil {
+		g.log.Errorf("unable to unmarshal camera simulator msg '%v': %v", string(rawLine), err)
+		return
+	}
 	for c := range g.cameraSubscribers {
-		var tMsg simulator.Msg
-		err := json.Unmarshal(rawLine, &tMsg)
-		if err != nil {
-			g.log.Errorf("unable to unmarshal camera simulator msg '%v': %v", string(rawLine), err)
-		}
 		c <- &tMsg
 	}
 }
 
-func (g *Gateway) publishFrame(msgSim *simulator.TelemetryMsg) *events.FrameRef {
+func (g *Gateway) publishFrame(msgSim *simulator.TelemetryMsg) (*events.FrameRef, error) {
 	now := time.Now()
 	frameRef := &events.FrameRef{
 		Name: "gateway",
@@ -264,17 +305,32 @@ func (g *Gateway) publishFrame(msgSim *simulator.TelemetryMsg) *events.FrameRef
 			Nanos:   int32(now.Nanosecond()),
 		},
 	}
+
 	msg := &events.FrameMessage{
 		Id:    frameRef,
 		Frame: msgSim.Image,
 	}
 
-	g.log.Debugf("events frame '%v/%v'", msg.Id.Name, msg.Id.Id)
+	img, _, err := image.Decode(bytes.NewReader(msgSim.Image))
+	if err != nil {
+		return nil, fmt.Errorf("bad image, skip simulator event: %w", err)
+	}
+	if img.Bounds().Dy() != g.imgHeight || img.Bounds().Dx() != g.imgWidth {
+		zap.S().Debugf("resize simulator image from (%vx%v) -> (%dx%d)", img.Bounds().Dx(), img.Bounds().Dy(), g.imgWidth, g.imgHeight)
+		img = imaging.Resize(img, g.imgWidth, g.imgHeight, imaging.NearestNeighbor)
+		var imgBuf bytes.Buffer
+		err = jpeg.Encode(&imgBuf, img, nil)
+		if err != nil {
+			return nil, fmt.Errorf("unable to encode to peg resized image: %w", err)
+		}
+		msg.Frame = imgBuf.Bytes()
+	}
 
+	g.log.Debugf("events frame '%v/%v'", msg.Id.Name, msg.Id.Id)
 	for fs := range g.frameSubscribers {
 		fs <- msg
 	}
-	return frameRef
+	return frameRef, nil
 }
 
 func (g *Gateway) publishInputSteering(msgSim *simulator.TelemetryMsg, frameRef *events.FrameRef) {
@@ -374,6 +430,7 @@ func (g *Gateway) WriteSteering(message *events.SteeringMessage) {
 	g.initLastControlMsg()
 
 	g.lastControl.Steering = fmt.Sprintf("%.2f", message.Steering)
+	zap.S().Debugf("steering updated: %v", g.lastControl.Steering)
 	g.writeControlCommandToSimulator()
 }
 
@@ -401,7 +458,7 @@ func (g *Gateway) writeCommand(content []byte) error {
 	g.log.Debugf("write command to simulator: %v", string(content))
 	w := bufio.NewWriter(g.conn)
 
-	_, err := w.Write(append(content, '\n'))
+	_, err := w.Write(content)
 	if err != nil {
 		return fmt.Errorf("unable to write control msg \"%#v\" to simulator: %v", g.lastControl, err)
 	}
@@ -425,6 +482,7 @@ func (g *Gateway) WriteThrottle(message *events.ThrottleMessage) {
 		g.lastControl.Brake = fmt.Sprintf("%.2f", -1*message.Throttle)
 	}
 
+	zap.S().Debugf("throttle updated: %v, brake: %v", g.lastControl.Throttle, g.lastControl.Brake)
 	g.writeControlCommandToSimulator()
 }
 
@@ -456,9 +514,13 @@ func (g *Gateway) writeCarConfig() error {
 		return fmt.Errorf("unable to send car config to simulator: %v", err)
 	}
 
-	msg := <-carChan
-	g.log.Infof("Car loaded: %v", msg)
-	time.Sleep(250 * time.Millisecond)
+	select {
+	case msg := <-carChan:
+		g.log.Infof("Car loaded: %v", msg)
+	case <-time.Tick(250 * time.Millisecond):
+		g.log.Info("no response after car loading")
+	}
+
 	return nil
 }
 
@@ -482,6 +544,7 @@ func (g *Gateway) writeRacerConfig() error {
 	case msg := <-racerChan:
 		g.log.Infof("Racer loaded: %v", msg)
 	case <-time.Tick(250 * time.Millisecond):
+		g.log.Info("no response after racer loading")
 	}
 	return nil
 }
@@ -506,6 +569,7 @@ func (g *Gateway) writeCameraConfig() error {
 	case msg := <-cameraChan:
 		g.log.Infof("Camera configured: %v", msg)
 	case <-time.Tick(250 * time.Millisecond):
+		g.log.Info("no response after camera loading")
 	}
 	return nil
 }

pkg/gateway/gateway_test.go

@@ -25,11 +25,14 @@ func TestGateway_ListenEvents(t *testing.T) {
 		}
 	}()
 
-	gw := New(simulatorMock.Addr(),
+	gw, err := New(simulatorMock.Addr(),
 		&simulator.CarConfigMsg{MsgType: simulator.MsgTypeCarConfig},
 		&simulator.RacerBioMsg{},
 		&simulator.CamConfigMsg{},
 	)
+	if err != nil {
+		t.Fatalf("unable to init test: %v", err)
+	}
 	go func() {
 		err := gw.Start()
 		if err != nil {

pkg/simulator/simulator.go

@@ -113,4 +113,6 @@ type CamConfigMsg struct {
 	OffsetY  string         `json:"offset_y"`
 	OffsetZ  string         `json:"offset_z"`
 	RotX     string         `json:"rot_x"`
+	RotY     string         `json:"rot_y"`
+	RotZ     string         `json:"rot_z"`
 }

vendor/github.com/cyrilix/robocar-base/cli/cli.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"github.com/cyrilix/robocar-base/service"
 	MQTT "github.com/eclipse/paho.mqtt.golang"
-	"log"
+	"go.uber.org/zap"
 	"os"
 	"os/signal"
 	"strconv"
@@ -25,7 +25,7 @@ func SetIntDefaultValueFromEnv(value *int, key string, defaultValue int) error {
 		sVal = os.Getenv(key)
 		val, err := strconv.Atoi(sVal)
 		if err != nil {
-			log.Printf("unable to convert string to int: %v", err)
+			zap.S().Errorf("unable to convert string to int: %v", err)
 			return err
 		}
 		*value = val
@@ -40,7 +40,7 @@ func SetFloat64DefaultValueFromEnv(value *float64, key string, defaultValue floa
 		sVal = os.Getenv(key)
 		val, err := strconv.ParseFloat(sVal, 64)
 		if err != nil {
-			log.Printf("unable to convert string to float: %v", err)
+			zap.S().Errorf("unable to convert string to float: %v", err)
 			return err
 		}
 		*value = val
@@ -81,7 +81,7 @@ func InitIntFlag(key string, defValue int) int {
 	var value int
 	err := SetIntDefaultValueFromEnv(&value, key, defValue)
 	if err != nil {
-		log.Panicf("invalid int value: %v", err)
+		zap.S().Panicf("invalid int value: %v", err)
 	}
 	return value
 }
@@ -90,7 +90,7 @@ func InitFloat64Flag(key string, defValue float64) float64 {
 	var value float64
 	err := SetFloat64DefaultValueFromEnv(&value, key, defValue)
 	if err != nil {
-		log.Panicf("invalid value: %v", err)
+		zap.S().Panicf("invalid value: %v", err)
 	}
 	return value
 }
@@ -106,8 +106,8 @@ func Connect(uri, username, password, clientId string) (MQTT.Client, error) {
 	opts.SetDefaultPublishHandler(
 		//define a function for the default message handler
 		func(client MQTT.Client, msg MQTT.Message) {
-			fmt.Printf("TOPIC: %s\n", msg.Topic())
-			fmt.Printf("MSG: %s\n", msg.Payload())
+			zap.S().Infof("TOPIC: %s", msg.Topic())
+			zap.S().Infof("MSG: %s", msg.Payload())
 		})
 
 	//create and start a client using the above ClientOptions

vendor/github.com/cyrilix/robocar-base/service/part.go

@@ -3,21 +3,21 @@ package service
 import (
 	"fmt"
 	mqtt "github.com/eclipse/paho.mqtt.golang"
-	"log"
+	"go.uber.org/zap"
 )
 
 func StopService(name string, client mqtt.Client, topics ...string) {
-	log.Printf("Stop %s service", name)
+	zap.S().Infof("Stop %s service", name)
 	token := client.Unsubscribe(topics...)
 	token.Wait()
 	if token.Error() != nil {
-		log.Printf("unable to unsubscribe service: %v", token.Error())
+		zap.S().Errorf("unable to unsubscribe service: %v", token.Error())
 	}
 	client.Disconnect(50)
 }
 
 func RegisterCallback(client mqtt.Client, topic string, callback mqtt.MessageHandler) error {
-	log.Printf("Register callback on topic %v", topic)
+	zap.S().Infof("Register callback on topic %v", topic)
 	token := client.Subscribe(topic, 0, callback)
 	token.Wait()
 	if token.Error() != nil {

vendor/github.com/cyrilix/robocar-protobuf/go/events/events.pb.go

@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.26.0
+// 	protoc-gen-go v1.27.1
 // 	protoc        v3.12.4
 // source: events/events.proto
 

vendor/github.com/disintegration/imaging/.travis.yml

@@ -0,0 +1,12 @@
+language: go
+go:
+  - "1.10.x"
+  - "1.11.x"
+  - "1.12.x"
+
+before_install:
+  - go get github.com/mattn/goveralls
+
+script:
+  - go test -v -race -cover
+  - $GOPATH/bin/goveralls -service=travis-ci

vendor/github.com/disintegration/imaging/LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2014 Simon Eskildsen
+Copyright (c) 2012 Grigory Dryapak
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -9,13 +9,13 @@ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/disintegration/imaging/README.md

@@ -0,0 +1,226 @@
+# Imaging
+
+[![GoDoc](https://godoc.org/github.com/disintegration/imaging?status.svg)](https://godoc.org/github.com/disintegration/imaging)
+[![Build Status](https://travis-ci.org/disintegration/imaging.svg?branch=master)](https://travis-ci.org/disintegration/imaging)
+[![Coverage Status](https://coveralls.io/repos/github/disintegration/imaging/badge.svg?branch=master&service=github)](https://coveralls.io/github/disintegration/imaging?branch=master)
+[![Go Report Card](https://goreportcard.com/badge/github.com/disintegration/imaging)](https://goreportcard.com/report/github.com/disintegration/imaging)
+
+Package imaging provides basic image processing functions (resize, rotate, crop, brightness/contrast adjustments, etc.).
+
+All the image processing functions provided by the package accept any image type that implements `image.Image` interface
+as an input, and return a new image of `*image.NRGBA` type (32bit RGBA colors, non-premultiplied alpha).
+
+## Installation
+
+    go get -u github.com/disintegration/imaging
+
+## Documentation
+
+http://godoc.org/github.com/disintegration/imaging
+
+## Usage examples
+
+A few usage examples can be found below. See the documentation for the full list of supported functions.
+
+### Image resizing
+
+```go
+// Resize srcImage to size = 128x128px using the Lanczos filter.
+dstImage128 := imaging.Resize(srcImage, 128, 128, imaging.Lanczos)
+
+// Resize srcImage to width = 800px preserving the aspect ratio.
+dstImage800 := imaging.Resize(srcImage, 800, 0, imaging.Lanczos)
+
+// Scale down srcImage to fit the 800x600px bounding box.
+dstImageFit := imaging.Fit(srcImage, 800, 600, imaging.Lanczos)
+
+// Resize and crop the srcImage to fill the 100x100px area.
+dstImageFill := imaging.Fill(srcImage, 100, 100, imaging.Center, imaging.Lanczos)
+```
+
+Imaging supports image resizing using various resampling filters. The most notable ones:
+- `Lanczos` - A high-quality resampling filter for photographic images yielding sharp results.
+- `CatmullRom` - A sharp cubic filter that is faster than Lanczos filter while providing similar results.
+- `MitchellNetravali` - A cubic filter that produces smoother results with less ringing artifacts than CatmullRom.
+- `Linear` - Bilinear resampling filter, produces smooth output. Faster than cubic filters.
+- `Box` - Simple and fast averaging filter appropriate for downscaling. When upscaling it's similar to NearestNeighbor.
+- `NearestNeighbor` - Fastest resampling filter, no antialiasing.
+
+The full list of supported filters:  NearestNeighbor, Box, Linear, Hermite, MitchellNetravali, CatmullRom, BSpline, Gaussian, Lanczos, Hann, Hamming, Blackman, Bartlett, Welch, Cosine. Custom filters can be created using ResampleFilter struct.
+
+**Resampling filters comparison**
+
+Original image:
+
+![srcImage](testdata/branches.png)
+
+The same image resized from 600x400px to 150x100px using different resampling filters.
+From faster (lower quality) to slower (higher quality):
+
+Filter                    | Resize result
+--------------------------|---------------------------------------------
+`imaging.NearestNeighbor` | ![dstImage](testdata/out_resize_nearest.png)
+`imaging.Linear`          | ![dstImage](testdata/out_resize_linear.png)
+`imaging.CatmullRom`      | ![dstImage](testdata/out_resize_catrom.png)
+`imaging.Lanczos`         | ![dstImage](testdata/out_resize_lanczos.png)
+
+
+### Gaussian Blur
+
+```go
+dstImage := imaging.Blur(srcImage, 0.5)
+```
+
+Sigma parameter allows to control the strength of the blurring effect.
+
+Original image                     | Sigma = 0.5                            | Sigma = 1.5
+-----------------------------------|----------------------------------------|---------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_blur_0.5.png) | ![dstImage](testdata/out_blur_1.5.png)
+
+### Sharpening
+
+```go
+dstImage := imaging.Sharpen(srcImage, 0.5)
+```
+
+`Sharpen` uses gaussian function internally. Sigma parameter allows to control the strength of the sharpening effect.
+
+Original image                     | Sigma = 0.5                               | Sigma = 1.5
+-----------------------------------|-------------------------------------------|------------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_sharpen_0.5.png) | ![dstImage](testdata/out_sharpen_1.5.png)
+
+### Gamma correction
+
+```go
+dstImage := imaging.AdjustGamma(srcImage, 0.75)
+```
+
+Original image                     | Gamma = 0.75                             | Gamma = 1.25
+-----------------------------------|------------------------------------------|-----------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_gamma_0.75.png) | ![dstImage](testdata/out_gamma_1.25.png)
+
+### Contrast adjustment
+
+```go
+dstImage := imaging.AdjustContrast(srcImage, 20)
+```
+
+Original image                     | Contrast = 15                              | Contrast = -15
+-----------------------------------|--------------------------------------------|-------------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_contrast_p15.png) | ![dstImage](testdata/out_contrast_m15.png)
+
+### Brightness adjustment
+
+```go
+dstImage := imaging.AdjustBrightness(srcImage, 20)
+```
+
+Original image                     | Brightness = 10                              | Brightness = -10
+-----------------------------------|----------------------------------------------|---------------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_brightness_p10.png) | ![dstImage](testdata/out_brightness_m10.png)
+
+### Saturation adjustment
+
+```go
+dstImage := imaging.AdjustSaturation(srcImage, 20)
+```
+
+Original image                     | Saturation = 30                              | Saturation = -30
+-----------------------------------|----------------------------------------------|---------------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_saturation_p30.png) | ![dstImage](testdata/out_saturation_m30.png)
+
+## FAQ
+
+### Incorrect image orientation after processing (e.g. an image appears rotated after resizing)
+
+Most probably, the given image contains the EXIF orientation tag.
+The stadard `image/*` packages do not support loading and saving
+this kind of information. To fix the issue, try opening images with
+the `AutoOrientation` decode option. If this option is set to `true`,
+the image orientation is changed after decoding, according to the
+orientation tag (if present). Here's the example:
+
+```go
+img, err := imaging.Open("test.jpg", imaging.AutoOrientation(true))
+```
+
+### What's the difference between `imaging` and `gift` packages?
+
+[imaging](https://github.com/disintegration/imaging)
+is designed to be a lightweight and simple image manipulation package.
+It provides basic image processing functions and a few helper functions
+such as `Open` and `Save`. It consistently returns *image.NRGBA image 
+type (8 bits per channel, RGBA).
+
+[gift](https://github.com/disintegration/gift)
+supports more advanced image processing, for example, sRGB/Linear color
+space conversions. It also supports different output image types
+(e.g. 16 bits per channel) and provides easy-to-use API for chaining
+multiple processing steps together.
+
+## Example code
+
+```go
+package main
+
+import (
+	"image"
+	"image/color"
+	"log"
+
+	"github.com/disintegration/imaging"
+)
+
+func main() {
+	// Open a test image.
+	src, err := imaging.Open("testdata/flowers.png")
+	if err != nil {
+		log.Fatalf("failed to open image: %v", err)
+	}
+
+	// Crop the original image to 300x300px size using the center anchor.
+	src = imaging.CropAnchor(src, 300, 300, imaging.Center)
+
+	// Resize the cropped image to width = 200px preserving the aspect ratio.
+	src = imaging.Resize(src, 200, 0, imaging.Lanczos)
+
+	// Create a blurred version of the image.
+	img1 := imaging.Blur(src, 5)
+
+	// Create a grayscale version of the image with higher contrast and sharpness.
+	img2 := imaging.Grayscale(src)
+	img2 = imaging.AdjustContrast(img2, 20)
+	img2 = imaging.Sharpen(img2, 2)
+
+	// Create an inverted version of the image.
+	img3 := imaging.Invert(src)
+
+	// Create an embossed version of the image using a convolution filter.
+	img4 := imaging.Convolve3x3(
+		src,
+		[9]float64{
+			-1, -1, 0,
+			-1, 1, 1,
+			0, 1, 1,
+		},
+		nil,
+	)
+
+	// Create a new image and paste the four produced images into it.
+	dst := imaging.New(400, 400, color.NRGBA{0, 0, 0, 0})
+	dst = imaging.Paste(dst, img1, image.Pt(0, 0))
+	dst = imaging.Paste(dst, img2, image.Pt(0, 200))
+	dst = imaging.Paste(dst, img3, image.Pt(200, 0))
+	dst = imaging.Paste(dst, img4, image.Pt(200, 200))
+
+	// Save the resulting image as JPEG.
+	err = imaging.Save(dst, "testdata/out_example.jpg")
+	if err != nil {
+		log.Fatalf("failed to save image: %v", err)
+	}
+}
+```
+
+Output:
+
+![dstImage](testdata/out_example.jpg)

vendor/github.com/disintegration/imaging/adjust.go

@@ -0,0 +1,253 @@
+package imaging
+
+import (
+	"image"
+	"image/color"
+	"math"
+)
+
+// Grayscale produces a grayscale version of the image.
+func Grayscale(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	parallel(0, src.h, func(ys <-chan int) {
+		for y := range ys {
+			i := y * dst.Stride
+			src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4])
+			for x := 0; x < src.w; x++ {
+				d := dst.Pix[i : i+3 : i+3]
+				r := d[0]
+				g := d[1]
+				b := d[2]
+				f := 0.299*float64(r) + 0.587*float64(g) + 0.114*float64(b)
+				y := uint8(f + 0.5)
+				d[0] = y
+				d[1] = y
+				d[2] = y
+				i += 4
+			}
+		}
+	})
+	return dst
+}
+
+// Invert produces an inverted (negated) version of the image.
+func Invert(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	parallel(0, src.h, func(ys <-chan int) {
+		for y := range ys {
+			i := y * dst.Stride
+			src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4])
+			for x := 0; x < src.w; x++ {
+				d := dst.Pix[i : i+3 : i+3]
+				d[0] = 255 - d[0]
+				d[1] = 255 - d[1]
+				d[2] = 255 - d[2]
+				i += 4
+			}
+		}
+	})
+	return dst
+}
+
+// AdjustSaturation changes the saturation of the image using the percentage parameter and returns the adjusted image.
+// The percentage must be in the range (-100, 100).
+// The percentage = 0 gives the original image.
+// The percentage = 100 gives the image with the saturation value doubled for each pixel.
+// The percentage = -100 gives the image with the saturation value zeroed for each pixel (grayscale).
+//
+// Examples:
+//  dstImage = imaging.AdjustSaturation(srcImage, 25) // Increase image saturation by 25%.
+//  dstImage = imaging.AdjustSaturation(srcImage, -10) // Decrease image saturation by 10%.
+//
+func AdjustSaturation(img image.Image, percentage float64) *image.NRGBA {
+	percentage = math.Min(math.Max(percentage, -100), 100)
+	multiplier := 1 + percentage/100
+
+	return AdjustFunc(img, func(c color.NRGBA) color.NRGBA {
+		h, s, l := rgbToHSL(c.R, c.G, c.B)
+		s *= multiplier
+		if s > 1 {
+			s = 1
+		}
+		r, g, b := hslToRGB(h, s, l)
+		return color.NRGBA{r, g, b, c.A}
+	})
+}
+
+// AdjustContrast changes the contrast of the image using the percentage parameter and returns the adjusted image.
+// The percentage must be in range (-100, 100). The percentage = 0 gives the original image.
+// The percentage = -100 gives solid gray image.
+//
+// Examples:
+//
+//	dstImage = imaging.AdjustContrast(srcImage, -10) // Decrease image contrast by 10%.
+//	dstImage = imaging.AdjustContrast(srcImage, 20) // Increase image contrast by 20%.
+//
+func AdjustContrast(img image.Image, percentage float64) *image.NRGBA {
+	percentage = math.Min(math.Max(percentage, -100.0), 100.0)
+	lut := make([]uint8, 256)
+
+	v := (100.0 + percentage) / 100.0
+	for i := 0; i < 256; i++ {
+		switch {
+		case 0 <= v && v <= 1:
+			lut[i] = clamp((0.5 + (float64(i)/255.0-0.5)*v) * 255.0)
+		case 1 < v && v < 2:
+			lut[i] = clamp((0.5 + (float64(i)/255.0-0.5)*(1/(2.0-v))) * 255.0)
+		default:
+			lut[i] = uint8(float64(i)/255.0+0.5) * 255
+		}
+	}
+
+	return adjustLUT(img, lut)
+}
+
+// AdjustBrightness changes the brightness of the image using the percentage parameter and returns the adjusted image.
+// The percentage must be in range (-100, 100). The percentage = 0 gives the original image.
+// The percentage = -100 gives solid black image. The percentage = 100 gives solid white image.
+//
+// Examples:
+//
+//	dstImage = imaging.AdjustBrightness(srcImage, -15) // Decrease image brightness by 15%.
+//	dstImage = imaging.AdjustBrightness(srcImage, 10) // Increase image brightness by 10%.
+//
+func AdjustBrightness(img image.Image, percentage float64) *image.NRGBA {
+	percentage = math.Min(math.Max(percentage, -100.0), 100.0)
+	lut := make([]uint8, 256)
+
+	shift := 255.0 * percentage / 100.0
+	for i := 0; i < 256; i++ {
+		lut[i] = clamp(float64(i) + shift)
+	}
+
+	return adjustLUT(img, lut)
+}
+
+// AdjustGamma performs a gamma correction on the image and returns the adjusted image.
+// Gamma parameter must be positive. Gamma = 1.0 gives the original image.
+// Gamma less than 1.0 darkens the image and gamma greater than 1.0 lightens it.
+//
+// Example:
+//
+//	dstImage = imaging.AdjustGamma(srcImage, 0.7)
+//
+func AdjustGamma(img image.Image, gamma float64) *image.NRGBA {
+	e := 1.0 / math.Max(gamma, 0.0001)
+	lut := make([]uint8, 256)
+
+	for i := 0; i < 256; i++ {
+		lut[i] = clamp(math.Pow(float64(i)/255.0, e) * 255.0)
+	}
+
+	return adjustLUT(img, lut)
+}
+
+// AdjustSigmoid changes the contrast of the image using a sigmoidal function and returns the adjusted image.
+// It's a non-linear contrast change useful for photo adjustments as it preserves highlight and shadow detail.
+// The midpoint parameter is the midpoint of contrast that must be between 0 and 1, typically 0.5.
+// The factor parameter indicates how much to increase or decrease the contrast, typically in range (-10, 10).
+// If the factor parameter is positive the image contrast is increased otherwise the contrast is decreased.
+//
+// Examples:
+//
+//	dstImage = imaging.AdjustSigmoid(srcImage, 0.5, 3.0) // Increase the contrast.
+//	dstImage = imaging.AdjustSigmoid(srcImage, 0.5, -3.0) // Decrease the contrast.
+//
+func AdjustSigmoid(img image.Image, midpoint, factor float64) *image.NRGBA {
+	if factor == 0 {
+		return Clone(img)
+	}
+
+	lut := make([]uint8, 256)
+	a := math.Min(math.Max(midpoint, 0.0), 1.0)
+	b := math.Abs(factor)
+	sig0 := sigmoid(a, b, 0)
+	sig1 := sigmoid(a, b, 1)
+	e := 1.0e-6
+
+	if factor > 0 {
+		for i := 0; i < 256; i++ {
+			x := float64(i) / 255.0
+			sigX := sigmoid(a, b, x)
+			f := (sigX - sig0) / (sig1 - sig0)
+			lut[i] = clamp(f * 255.0)
+		}
+	} else {
+		for i := 0; i < 256; i++ {
+			x := float64(i) / 255.0
+			arg := math.Min(math.Max((sig1-sig0)*x+sig0, e), 1.0-e)
+			f := a - math.Log(1.0/arg-1.0)/b
+			lut[i] = clamp(f * 255.0)
+		}
+	}
+
+	return adjustLUT(img, lut)
+}
+
+func sigmoid(a, b, x float64) float64 {
+	return 1 / (1 + math.Exp(b*(a-x)))
+}
+
+// adjustLUT applies the given lookup table to the colors of the image.
+func adjustLUT(img image.Image, lut []uint8) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	lut = lut[0:256]
+	parallel(0, src.h, func(ys <-chan int) {
+		for y := range ys {
+			i := y * dst.Stride
+			src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4])
+			for x := 0; x < src.w; x++ {
+				d := dst.Pix[i : i+3 : i+3]
+				d[0] = lut[d[0]]
+				d[1] = lut[d[1]]
+				d[2] = lut[d[2]]
+				i += 4
+			}
+		}
+	})
+	return dst
+}
+
+// AdjustFunc applies the fn function to each pixel of the img image and returns the adjusted image.
+//
+// Example:
+//
+//	dstImage = imaging.AdjustFunc(
+//		srcImage,
+//		func(c color.NRGBA) color.NRGBA {
+//			// Shift the red channel by 16.
+//			r := int(c.R) + 16
+//			if r > 255 {
+//				r = 255
+//			}
+//			return color.NRGBA{uint8(r), c.G, c.B, c.A}
+//		}
+//	)
+//
+func AdjustFunc(img image.Image, fn func(c color.NRGBA) color.NRGBA) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	parallel(0, src.h, func(ys <-chan int) {
+		for y := range ys {
+			i := y * dst.Stride
+			src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4])
+			for x := 0; x < src.w; x++ {
+				d := dst.Pix[i : i+4 : i+4]
+				r := d[0]
+				g := d[1]
+				b := d[2]
+				a := d[3]
+				c := fn(color.NRGBA{r, g, b, a})
+				d[0] = c.R
+				d[1] = c.G
+				d[2] = c.B
+				d[3] = c.A
+				i += 4
+			}
+		}
+	})
+	return dst
+}

vendor/github.com/disintegration/imaging/convolution.go

@@ -0,0 +1,148 @@
+package imaging
+
+import (
+	"image"
+)
+
+// ConvolveOptions are convolution parameters.
+type ConvolveOptions struct {
+	// If Normalize is true the kernel is normalized before convolution.
+	Normalize bool
+
+	// If Abs is true the absolute value of each color channel is taken after convolution.
+	Abs bool
+
+	// Bias is added to each color channel value after convolution.
+	Bias int
+}
+
+// Convolve3x3 convolves the image with the specified 3x3 convolution kernel.
+// Default parameters are used if a nil *ConvolveOptions is passed.
+func Convolve3x3(img image.Image, kernel [9]float64, options *ConvolveOptions) *image.NRGBA {
+	return convolve(img, kernel[:], options)
+}
+
+// Convolve5x5 convolves the image with the specified 5x5 convolution kernel.
+// Default parameters are used if a nil *ConvolveOptions is passed.
+func Convolve5x5(img image.Image, kernel [25]float64, options *ConvolveOptions) *image.NRGBA {
+	return convolve(img, kernel[:], options)
+}
+
+func convolve(img image.Image, kernel []float64, options *ConvolveOptions) *image.NRGBA {
+	src := toNRGBA(img)
+	w := src.Bounds().Max.X
+	h := src.Bounds().Max.Y
+	dst := image.NewNRGBA(image.Rect(0, 0, w, h))
+
+	if w < 1 || h < 1 {
+		return dst
+	}
+
+	if options == nil {
+		options = &ConvolveOptions{}
+	}
+
+	if options.Normalize {
+		normalizeKernel(kernel)
+	}
+
+	type coef struct {
+		x, y int
+		k    float64
+	}
+	var coefs []coef
+	var m int
+
+	switch len(kernel) {
+	case 9:
+		m = 1
+	case 25:
+		m = 2
+	}
+
+	i := 0
+	for y := -m; y <= m; y++ {
+		for x := -m; x <= m; x++ {
+			if kernel[i] != 0 {
+				coefs = append(coefs, coef{x: x, y: y, k: kernel[i]})
+			}
+			i++
+		}
+	}
+
+	parallel(0, h, func(ys <-chan int) {
+		for y := range ys {
+			for x := 0; x < w; x++ {
+				var r, g, b float64
+				for _, c := range coefs {
+					ix := x + c.x
+					if ix < 0 {
+						ix = 0
+					} else if ix >= w {
+						ix = w - 1
+					}
+
+					iy := y + c.y
+					if iy < 0 {
+						iy = 0
+					} else if iy >= h {
+						iy = h - 1
+					}
+
+					off := iy*src.Stride + ix*4
+					s := src.Pix[off : off+3 : off+3]
+					r += float64(s[0]) * c.k
+					g += float64(s[1]) * c.k
+					b += float64(s[2]) * c.k
+				}
+
+				if options.Abs {
+					if r < 0 {
+						r = -r
+					}
+					if g < 0 {
+						g = -g
+					}
+					if b < 0 {
+						b = -b
+					}
+				}
+
+				if options.Bias != 0 {
+					r += float64(options.Bias)
+					g += float64(options.Bias)
+					b += float64(options.Bias)
+				}
+
+				srcOff := y*src.Stride + x*4
+				dstOff := y*dst.Stride + x*4
+				d := dst.Pix[dstOff : dstOff+4 : dstOff+4]
+				d[0] = clamp(r)
+				d[1] = clamp(g)
+				d[2] = clamp(b)
+				d[3] = src.Pix[srcOff+3]
+			}
+		}
+	})
+
+	return dst
+}
+
+func normalizeKernel(kernel []float64) {
+	var sum, sumpos float64
+	for i := range kernel {
+		sum += kernel[i]
+		if kernel[i] > 0 {
+			sumpos += kernel[i]
+		}
+	}
+	if sum != 0 {
+		for i := range kernel {
+			kernel[i] /= sum
+		}
+	} else if sumpos != 0 {
+		for i := range kernel {
+			kernel[i] /= sumpos
+		}
+	}
+}

vendor/github.com/disintegration/imaging/doc.go

@@ -0,0 +1,7 @@
+/*
+Package imaging provides basic image processing functions (resize, rotate, crop, brightness/contrast adjustments, etc.).
+
+All the image processing functions provided by the package accept any image type that implements image.Image interface
+as an input, and return a new image of *image.NRGBA type (32bit RGBA colors, non-premultiplied alpha).
+*/
+package imaging

vendor/github.com/disintegration/imaging/effects.go

@@ -0,0 +1,169 @@
+package imaging
+
+import (
+	"image"
+	"math"
+)
+
+func gaussianBlurKernel(x, sigma float64) float64 {
+	return math.Exp(-(x*x)/(2*sigma*sigma)) / (sigma * math.Sqrt(2*math.Pi))
+}
+
+// Blur produces a blurred version of the image using a Gaussian function.
+// Sigma parameter must be positive and indicates how much the image will be blurred.
+//
+// Example:
+//
+//	dstImage := imaging.Blur(srcImage, 3.5)
+//
+func Blur(img image.Image, sigma float64) *image.NRGBA {
+	if sigma <= 0 {
+		return Clone(img)
+	}
+
+	radius := int(math.Ceil(sigma * 3.0))
+	kernel := make([]float64, radius+1)
+
+	for i := 0; i <= radius; i++ {
+		kernel[i] = gaussianBlurKernel(float64(i), sigma)
+	}
+
+	return blurVertical(blurHorizontal(img, kernel), kernel)
+}
+
+func blurHorizontal(img image.Image, kernel []float64) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	radius := len(kernel) - 1
+
+	parallel(0, src.h, func(ys <-chan int) {
+		scanLine := make([]uint8, src.w*4)
+		scanLineF := make([]float64, len(scanLine))
+		for y := range ys {
+			src.scan(0, y, src.w, y+1, scanLine)
+			for i, v := range scanLine {
+				scanLineF[i] = float64(v)
+			}
+			for x := 0; x < src.w; x++ {
+				min := x - radius
+				if min < 0 {
+					min = 0
+				}
+				max := x + radius
+				if max > src.w-1 {
+					max = src.w - 1
+				}
+				var r, g, b, a, wsum float64
+				for ix := min; ix <= max; ix++ {
+					i := ix * 4
+					weight := kernel[absint(x-ix)]
+					wsum += weight
+					s := scanLineF[i : i+4 : i+4]
+					wa := s[3] * weight
+					r += s[0] * wa
+					g += s[1] * wa
+					b += s[2] * wa
+					a += wa
+				}
+				if a != 0 {
+					aInv := 1 / a
+					j := y*dst.Stride + x*4
+					d := dst.Pix[j : j+4 : j+4]
+					d[0] = clamp(r * aInv)
+					d[1] = clamp(g * aInv)
+					d[2] = clamp(b * aInv)
+					d[3] = clamp(a / wsum)
+				}
+			}
+		}
+	})
+
+	return dst
+}
+
+func blurVertical(img image.Image, kernel []float64) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	radius := len(kernel) - 1
+
+	parallel(0, src.w, func(xs <-chan int) {
+		scanLine := make([]uint8, src.h*4)
+		scanLineF := make([]float64, len(scanLine))
+		for x := range xs {
+			src.scan(x, 0, x+1, src.h, scanLine)
+			for i, v := range scanLine {
+				scanLineF[i] = float64(v)
+			}
+			for y := 0; y < src.h; y++ {
+				min := y - radius
+				if min < 0 {
+					min = 0
+				}
+				max := y + radius
+				if max > src.h-1 {
+					max = src.h - 1
+				}
+				var r, g, b, a, wsum float64
+				for iy := min; iy <= max; iy++ {
+					i := iy * 4
+					weight := kernel[absint(y-iy)]
+					wsum += weight
+					s := scanLineF[i : i+4 : i+4]
+					wa := s[3] * weight
+					r += s[0] * wa
+					g += s[1] * wa
+					b += s[2] * wa
+					a += wa
+				}
+				if a != 0 {
+					aInv := 1 / a
+					j := y*dst.Stride + x*4
+					d := dst.Pix[j : j+4 : j+4]
+					d[0] = clamp(r * aInv)
+					d[1] = clamp(g * aInv)
+					d[2] = clamp(b * aInv)
+					d[3] = clamp(a / wsum)
+				}
+			}
+		}
+	})
+
+	return dst
+}
+
+// Sharpen produces a sharpened version of the image.
+// Sigma parameter must be positive and indicates how much the image will be sharpened.
+//
+// Example:
+//
+//	dstImage := imaging.Sharpen(srcImage, 3.5)
+//
+func Sharpen(img image.Image, sigma float64) *image.NRGBA {
+	if sigma <= 0 {
+		return Clone(img)
+	}
+
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	blurred := Blur(img, sigma)
+
+	parallel(0, src.h, func(ys <-chan int) {
+		scanLine := make([]uint8, src.w*4)
+		for y := range ys {
+			src.scan(0, y, src.w, y+1, scanLine)
+			j := y * dst.Stride
+			for i := 0; i < src.w*4; i++ {
+				val := int(scanLine[i])<<1 - int(blurred.Pix[j])
+				if val < 0 {
+					val = 0
+				} else if val > 0xff {
+					val = 0xff
+				}
+				dst.Pix[j] = uint8(val)
+				j++
+			}
+		}
+	})
+
+	return dst
+}

vendor/github.com/disintegration/imaging/histogram.go

@@ -0,0 +1,52 @@
+package imaging
+
+import (
+	"image"
+	"sync"
+)
+
+// Histogram returns a normalized histogram of an image.
+//
+// Resulting histogram is represented as an array of 256 floats, where
+// histogram[i] is a probability of a pixel being of a particular luminance i.
+func Histogram(img image.Image) [256]float64 {
+	var mu sync.Mutex
+	var histogram [256]float64
+	var total float64
+
+	src := newScanner(img)
+	if src.w == 0 || src.h == 0 {
+		return histogram
+	}
+
+	parallel(0, src.h, func(ys <-chan int) {
+		var tmpHistogram [256]float64
+		var tmpTotal float64
+		scanLine := make([]uint8, src.w*4)
+		for y := range ys {
+			src.scan(0, y, src.w, y+1, scanLine)
+			i := 0
+			for x := 0; x < src.w; x++ {
+				s := scanLine[i : i+3 : i+3]
+				r := s[0]
+				g := s[1]
+				b := s[2]
+				y := 0.299*float32(r) + 0.587*float32(g) + 0.114*float32(b)
+				tmpHistogram[int(y+0.5)]++
+				tmpTotal++
+				i += 4
+			}
+		}
+		mu.Lock()
+		for i := 0; i < 256; i++ {
+			histogram[i] += tmpHistogram[i]
+		}
+		total += tmpTotal
+		mu.Unlock()
+	})
+
+	for i := 0; i < 256; i++ {
+		histogram[i] = histogram[i] / total
+	}
+	return histogram
+}

vendor/github.com/disintegration/imaging/io.go

@@ -0,0 +1,444 @@
+package imaging
+
+import (
+	"encoding/binary"
+	"errors"
+	"image"
+	"image/draw"
+	"image/gif"
+	"image/jpeg"
+	"image/png"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"golang.org/x/image/bmp"
+	"golang.org/x/image/tiff"
+)
+
+type fileSystem interface {
+	Create(string) (io.WriteCloser, error)
+	Open(string) (io.ReadCloser, error)
+}
+
+type localFS struct{}
+
+func (localFS) Create(name string) (io.WriteCloser, error) { return os.Create(name) }
+func (localFS) Open(name string) (io.ReadCloser, error)    { return os.Open(name) }
+
+var fs fileSystem = localFS{}
+
+type decodeConfig struct {
+	autoOrientation bool
+}
+
+var defaultDecodeConfig = decodeConfig{
+	autoOrientation: false,
+}
+
+// DecodeOption sets an optional parameter for the Decode and Open functions.
+type DecodeOption func(*decodeConfig)
+
+// AutoOrientation returns a DecodeOption that sets the auto-orientation mode.
+// If auto-orientation is enabled, the image will be transformed after decoding
+// according to the EXIF orientation tag (if present). By default it's disabled.
+func AutoOrientation(enabled bool) DecodeOption {
+	return func(c *decodeConfig) {
+		c.autoOrientation = enabled
+	}
+}
+
+// Decode reads an image from r.
+func Decode(r io.Reader, opts ...DecodeOption) (image.Image, error) {
+	cfg := defaultDecodeConfig
+	for _, option := range opts {
+		option(&cfg)
+	}
+
+	if !cfg.autoOrientation {
+		img, _, err := image.Decode(r)
+		return img, err
+	}
+
+	var orient orientation
+	pr, pw := io.Pipe()
+	r = io.TeeReader(r, pw)
+	done := make(chan struct{})
+	go func() {
+		defer close(done)
+		orient = readOrientation(pr)
+		io.Copy(ioutil.Discard, pr)
+	}()
+
+	img, _, err := image.Decode(r)
+	pw.Close()
+	<-done
+	if err != nil {
+		return nil, err
+	}
+
+	return fixOrientation(img, orient), nil
+}
+
+// Open loads an image from file.
+//
+// Examples:
+//
+//	// Load an image from file.
+//	img, err := imaging.Open("test.jpg")
+//
+//	// Load an image and transform it depending on the EXIF orientation tag (if present).
+//	img, err := imaging.Open("test.jpg", imaging.AutoOrientation(true))
+//
+func Open(filename string, opts ...DecodeOption) (image.Image, error) {
+	file, err := fs.Open(filename)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+	return Decode(file, opts...)
+}
+
+// Format is an image file format.
+type Format int
+
+// Image file formats.
+const (
+	JPEG Format = iota
+	PNG
+	GIF
+	TIFF
+	BMP
+)
+
+var formatExts = map[string]Format{
+	"jpg":  JPEG,
+	"jpeg": JPEG,
+	"png":  PNG,
+	"gif":  GIF,
+	"tif":  TIFF,
+	"tiff": TIFF,
+	"bmp":  BMP,
+}
+
+var formatNames = map[Format]string{
+	JPEG: "JPEG",
+	PNG:  "PNG",
+	GIF:  "GIF",
+	TIFF: "TIFF",
+	BMP:  "BMP",
+}
+
+func (f Format) String() string {
+	return formatNames[f]
+}
+
+// ErrUnsupportedFormat means the given image format is not supported.
+var ErrUnsupportedFormat = errors.New("imaging: unsupported image format")
+
+// FormatFromExtension parses image format from filename extension:
+// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported.
+func FormatFromExtension(ext string) (Format, error) {
+	if f, ok := formatExts[strings.ToLower(strings.TrimPrefix(ext, "."))]; ok {
+		return f, nil
+	}
+	return -1, ErrUnsupportedFormat
+}
+
+// FormatFromFilename parses image format from filename:
+// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported.
+func FormatFromFilename(filename string) (Format, error) {
+	ext := filepath.Ext(filename)
+	return FormatFromExtension(ext)
+}
+
+type encodeConfig struct {
+	jpegQuality         int
+	gifNumColors        int
+	gifQuantizer        draw.Quantizer
+	gifDrawer           draw.Drawer
+	pngCompressionLevel png.CompressionLevel
+}
+
+var defaultEncodeConfig = encodeConfig{
+	jpegQuality:         95,
+	gifNumColors:        256,
+	gifQuantizer:        nil,
+	gifDrawer:           nil,
+	pngCompressionLevel: png.DefaultCompression,
+}
+
+// EncodeOption sets an optional parameter for the Encode and Save functions.
+type EncodeOption func(*encodeConfig)
+
+// JPEGQuality returns an EncodeOption that sets the output JPEG quality.
+// Quality ranges from 1 to 100 inclusive, higher is better. Default is 95.
+func JPEGQuality(quality int) EncodeOption {
+	return func(c *encodeConfig) {
+		c.jpegQuality = quality
+	}
+}
+
+// GIFNumColors returns an EncodeOption that sets the maximum number of colors
+// used in the GIF-encoded image. It ranges from 1 to 256.  Default is 256.
+func GIFNumColors(numColors int) EncodeOption {
+	return func(c *encodeConfig) {
+		c.gifNumColors = numColors
+	}
+}
+
+// GIFQuantizer returns an EncodeOption that sets the quantizer that is used to produce
+// a palette of the GIF-encoded image.
+func GIFQuantizer(quantizer draw.Quantizer) EncodeOption {
+	return func(c *encodeConfig) {
+		c.gifQuantizer = quantizer
+	}
+}
+
+// GIFDrawer returns an EncodeOption that sets the drawer that is used to convert
+// the source image to the desired palette of the GIF-encoded image.
+func GIFDrawer(drawer draw.Drawer) EncodeOption {
+	return func(c *encodeConfig) {
+		c.gifDrawer = drawer
+	}
+}
+
+// PNGCompressionLevel returns an EncodeOption that sets the compression level
+// of the PNG-encoded image. Default is png.DefaultCompression.
+func PNGCompressionLevel(level png.CompressionLevel) EncodeOption {
+	return func(c *encodeConfig) {
+		c.pngCompressionLevel = level
+	}
+}
+
+// Encode writes the image img to w in the specified format (JPEG, PNG, GIF, TIFF or BMP).
+func Encode(w io.Writer, img image.Image, format Format, opts ...EncodeOption) error {
+	cfg := defaultEncodeConfig
+	for _, option := range opts {
+		option(&cfg)
+	}
+
+	switch format {
+	case JPEG:
+		if nrgba, ok := img.(*image.NRGBA); ok && nrgba.Opaque() {
+			rgba := &image.RGBA{
+				Pix:    nrgba.Pix,
+				Stride: nrgba.Stride,
+				Rect:   nrgba.Rect,
+			}
+			return jpeg.Encode(w, rgba, &jpeg.Options{Quality: cfg.jpegQuality})
+		}
+		return jpeg.Encode(w, img, &jpeg.Options{Quality: cfg.jpegQuality})
+
+	case PNG:
+		encoder := png.Encoder{CompressionLevel: cfg.pngCompressionLevel}
+		return encoder.Encode(w, img)
+
+	case GIF:
+		return gif.Encode(w, img, &gif.Options{
+			NumColors: cfg.gifNumColors,
+			Quantizer: cfg.gifQuantizer,
+			Drawer:    cfg.gifDrawer,
+		})
+
+	case TIFF:
+		return tiff.Encode(w, img, &tiff.Options{Compression: tiff.Deflate, Predictor: true})
+
+	case BMP:
+		return bmp.Encode(w, img)
+	}
+
+	return ErrUnsupportedFormat
+}
+
+// Save saves the image to file with the specified filename.
+// The format is determined from the filename extension:
+// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported.
+//
+// Examples:
+//
+//	// Save the image as PNG.
+//	err := imaging.Save(img, "out.png")
+//
+//	// Save the image as JPEG with optional quality parameter set to 80.
+//	err := imaging.Save(img, "out.jpg", imaging.JPEGQuality(80))
+//
+func Save(img image.Image, filename string, opts ...EncodeOption) (err error) {
+	f, err := FormatFromFilename(filename)
+	if err != nil {
+		return err
+	}
+	file, err := fs.Create(filename)
+	if err != nil {
+		return err
+	}
+	err = Encode(file, img, f, opts...)
+	errc := file.Close()
+	if err == nil {
+		err = errc
+	}
+	return err
+}
+
+// orientation is an EXIF flag that specifies the transformation
+// that should be applied to image to display it correctly.
+type orientation int
+
+const (
+	orientationUnspecified = 0
+	orientationNormal      = 1
+	orientationFlipH       = 2
+	orientationRotate180   = 3
+	orientationFlipV       = 4
+	orientationTranspose   = 5
+	orientationRotate270   = 6
+	orientationTransverse  = 7
+	orientationRotate90    = 8
+)
+
+// readOrientation tries to read the orientation EXIF flag from image data in r.
+// If the EXIF data block is not found or the orientation flag is not found
+// or any other error occures while reading the data, it returns the
+// orientationUnspecified (0) value.
+func readOrientation(r io.Reader) orientation {
+	const (
+		markerSOI      = 0xffd8
+		markerAPP1     = 0xffe1
+		exifHeader     = 0x45786966
+		byteOrderBE    = 0x4d4d
+		byteOrderLE    = 0x4949
+		orientationTag = 0x0112
+	)
+
+	// Check if JPEG SOI marker is present.
+	var soi uint16
+	if err := binary.Read(r, binary.BigEndian, &soi); err != nil {
+		return orientationUnspecified
+	}
+	if soi != markerSOI {
+		return orientationUnspecified // Missing JPEG SOI marker.
+	}
+
+	// Find JPEG APP1 marker.
+	for {
+		var marker, size uint16
+		if err := binary.Read(r, binary.BigEndian, &marker); err != nil {
+			return orientationUnspecified
+		}
+		if err := binary.Read(r, binary.BigEndian, &size); err != nil {
+			return orientationUnspecified
+		}
+		if marker>>8 != 0xff {
+			return orientationUnspecified // Invalid JPEG marker.
+		}
+		if marker == markerAPP1 {
+			break
+		}
+		if size < 2 {
+			return orientationUnspecified // Invalid block size.
+		}
+		if _, err := io.CopyN(ioutil.Discard, r, int64(size-2)); err != nil {
+			return orientationUnspecified
+		}
+	}
+
+	// Check if EXIF header is present.
+	var header uint32
+	if err := binary.Read(r, binary.BigEndian, &header); err != nil {
+		return orientationUnspecified
+	}
+	if header != exifHeader {
+		return orientationUnspecified
+	}
+	if _, err := io.CopyN(ioutil.Discard, r, 2); err != nil {
+		return orientationUnspecified
+	}
+
+	// Read byte order information.
+	var (
+		byteOrderTag uint16
+		byteOrder    binary.ByteOrder
+	)
+	if err := binary.Read(r, binary.BigEndian, &byteOrderTag); err != nil {
+		return orientationUnspecified
+	}
+	switch byteOrderTag {
+	case byteOrderBE:
+		byteOrder = binary.BigEndian
+	case byteOrderLE:
+		byteOrder = binary.LittleEndian
+	default:
+		return orientationUnspecified // Invalid byte order flag.
+	}
+	if _, err := io.CopyN(ioutil.Discard, r, 2); err != nil {
+		return orientationUnspecified
+	}
+
+	// Skip the EXIF offset.
+	var offset uint32
+	if err := binary.Read(r, byteOrder, &offset); err != nil {
+		return orientationUnspecified
+	}
+	if offset < 8 {
+		return orientationUnspecified // Invalid offset value.
+	}
+	if _, err := io.CopyN(ioutil.Discard, r, int64(offset-8)); err != nil {
+		return orientationUnspecified
+	}
+
+	// Read the number of tags.
+	var numTags uint16
+	if err := binary.Read(r, byteOrder, &numTags); err != nil {
+		return orientationUnspecified
+	}
+
+	// Find the orientation tag.
+	for i := 0; i < int(numTags); i++ {
+		var tag uint16
+		if err := binary.Read(r, byteOrder, &tag); err != nil {
+			return orientationUnspecified
+		}
+		if tag != orientationTag {
+			if _, err := io.CopyN(ioutil.Discard, r, 10); err != nil {
+				return orientationUnspecified
+			}
+			continue
+		}
+		if _, err := io.CopyN(ioutil.Discard, r, 6); err != nil {
+			return orientationUnspecified
+		}
+		var val uint16
+		if err := binary.Read(r, byteOrder, &val); err != nil {
+			return orientationUnspecified
+		}
+		if val < 1 || val > 8 {
+			return orientationUnspecified // Invalid tag value.
+		}
+		return orientation(val)
+	}
+	return orientationUnspecified // Missing orientation tag.
+}
+
+// fixOrientation applies a transform to img corresponding to the given orientation flag.
+func fixOrientation(img image.Image, o orientation) image.Image {
+	switch o {
+	case orientationNormal:
+	case orientationFlipH:
+		img = FlipH(img)
+	case orientationFlipV:
+		img = FlipV(img)
+	case orientationRotate90:
+		img = Rotate90(img)
+	case orientationRotate180:
+		img = Rotate180(img)
+	case orientationRotate270:
+		img = Rotate270(img)
+	case orientationTranspose:
+		img = Transpose(img)
+	case orientationTransverse:
+		img = Transverse(img)
+	}
+	return img
+}

vendor/github.com/disintegration/imaging/resize.go

@@ -0,0 +1,595 @@
+package imaging
+
+import (
+	"image"
+	"math"
+)
+
+type indexWeight struct {
+	index  int
+	weight float64
+}
+
+func precomputeWeights(dstSize, srcSize int, filter ResampleFilter) [][]indexWeight {
+	du := float64(srcSize) / float64(dstSize)
+	scale := du
+	if scale < 1.0 {
+		scale = 1.0
+	}
+	ru := math.Ceil(scale * filter.Support)
+
+	out := make([][]indexWeight, dstSize)
+	tmp := make([]indexWeight, 0, dstSize*int(ru+2)*2)
+
+	for v := 0; v < dstSize; v++ {
+		fu := (float64(v)+0.5)*du - 0.5
+
+		begin := int(math.Ceil(fu - ru))
+		if begin < 0 {
+			begin = 0
+		}
+		end := int(math.Floor(fu + ru))
+		if end > srcSize-1 {
+			end = srcSize - 1
+		}
+
+		var sum float64
+		for u := begin; u <= end; u++ {
+			w := filter.Kernel((float64(u) - fu) / scale)
+			if w != 0 {
+				sum += w
+				tmp = append(tmp, indexWeight{index: u, weight: w})
+			}
+		}
+		if sum != 0 {
+			for i := range tmp {
+				tmp[i].weight /= sum
+			}
+		}
+
+		out[v] = tmp
+		tmp = tmp[len(tmp):]
+	}
+
+	return out
+}
+
+// Resize resizes the image to the specified width and height using the specified resampling
+// filter and returns the transformed image. If one of width or height is 0, the image aspect
+// ratio is preserved.
+//
+// Example:
+//
+//	dstImage := imaging.Resize(srcImage, 800, 600, imaging.Lanczos)
+//
+func Resize(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA {
+	dstW, dstH := width, height
+	if dstW < 0 || dstH < 0 {
+		return &image.NRGBA{}
+	}
+	if dstW == 0 && dstH == 0 {
+		return &image.NRGBA{}
+	}
+
+	srcW := img.Bounds().Dx()
+	srcH := img.Bounds().Dy()
+	if srcW <= 0 || srcH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	// If new width or height is 0 then preserve aspect ratio, minimum 1px.
+	if dstW == 0 {
+		tmpW := float64(dstH) * float64(srcW) / float64(srcH)
+		dstW = int(math.Max(1.0, math.Floor(tmpW+0.5)))
+	}
+	if dstH == 0 {
+		tmpH := float64(dstW) * float64(srcH) / float64(srcW)
+		dstH = int(math.Max(1.0, math.Floor(tmpH+0.5)))
+	}
+
+	if filter.Support <= 0 {
+		// Nearest-neighbor special case.
+		return resizeNearest(img, dstW, dstH)
+	}
+
+	if srcW != dstW && srcH != dstH {
+		return resizeVertical(resizeHorizontal(img, dstW, filter), dstH, filter)
+	}
+	if srcW != dstW {
+		return resizeHorizontal(img, dstW, filter)
+	}
+	if srcH != dstH {
+		return resizeVertical(img, dstH, filter)
+	}
+	return Clone(img)
+}
+
+func resizeHorizontal(img image.Image, width int, filter ResampleFilter) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, width, src.h))
+	weights := precomputeWeights(width, src.w, filter)
+	parallel(0, src.h, func(ys <-chan int) {
+		scanLine := make([]uint8, src.w*4)
+		for y := range ys {
+			src.scan(0, y, src.w, y+1, scanLine)
+			j0 := y * dst.Stride
+			for x := range weights {
+				var r, g, b, a float64
+				for _, w := range weights[x] {
+					i := w.index * 4
+					s := scanLine[i : i+4 : i+4]
+					aw := float64(s[3]) * w.weight
+					r += float64(s[0]) * aw
+					g += float64(s[1]) * aw
+					b += float64(s[2]) * aw
+					a += aw
+				}
+				if a != 0 {
+					aInv := 1 / a
+					j := j0 + x*4
+					d := dst.Pix[j : j+4 : j+4]
+					d[0] = clamp(r * aInv)
+					d[1] = clamp(g * aInv)
+					d[2] = clamp(b * aInv)
+					d[3] = clamp(a)
+				}
+			}
+		}
+	})
+	return dst
+}
+
+func resizeVertical(img image.Image, height int, filter ResampleFilter) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, height))
+	weights := precomputeWeights(height, src.h, filter)
+	parallel(0, src.w, func(xs <-chan int) {
+		scanLine := make([]uint8, src.h*4)
+		for x := range xs {
+			src.scan(x, 0, x+1, src.h, scanLine)
+			for y := range weights {
+				var r, g, b, a float64
+				for _, w := range weights[y] {
+					i := w.index * 4
+					s := scanLine[i : i+4 : i+4]
+					aw := float64(s[3]) * w.weight
+					r += float64(s[0]) * aw
+					g += float64(s[1]) * aw
+					b += float64(s[2]) * aw
+					a += aw
+				}
+				if a != 0 {
+					aInv := 1 / a
+					j := y*dst.Stride + x*4
+					d := dst.Pix[j : j+4 : j+4]
+					d[0] = clamp(r * aInv)
+					d[1] = clamp(g * aInv)
+					d[2] = clamp(b * aInv)
+					d[3] = clamp(a)
+				}
+			}
+		}
+	})
+	return dst
+}
+
+// resizeNearest is a fast nearest-neighbor resize, no filtering.
+func resizeNearest(img image.Image, width, height int) *image.NRGBA {
+	dst := image.NewNRGBA(image.Rect(0, 0, width, height))
+	dx := float64(img.Bounds().Dx()) / float64(width)
+	dy := float64(img.Bounds().Dy()) / float64(height)
+
+	if dx > 1 && dy > 1 {
+		src := newScanner(img)
+		parallel(0, height, func(ys <-chan int) {
+			for y := range ys {
+				srcY := int((float64(y) + 0.5) * dy)
+				dstOff := y * dst.Stride
+				for x := 0; x < width; x++ {
+					srcX := int((float64(x) + 0.5) * dx)
+					src.scan(srcX, srcY, srcX+1, srcY+1, dst.Pix[dstOff:dstOff+4])
+					dstOff += 4
+				}
+			}
+		})
+	} else {
+		src := toNRGBA(img)
+		parallel(0, height, func(ys <-chan int) {
+			for y := range ys {
+				srcY := int((float64(y) + 0.5) * dy)
+				srcOff0 := srcY * src.Stride
+				dstOff := y * dst.Stride
+				for x := 0; x < width; x++ {
+					srcX := int((float64(x) + 0.5) * dx)
+					srcOff := srcOff0 + srcX*4
+					copy(dst.Pix[dstOff:dstOff+4], src.Pix[srcOff:srcOff+4])
+					dstOff += 4
+				}
+			}
+		})
+	}
+
+	return dst
+}
+
+// Fit scales down the image using the specified resample filter to fit the specified
+// maximum width and height and returns the transformed image.
+//
+// Example:
+//
+//	dstImage := imaging.Fit(srcImage, 800, 600, imaging.Lanczos)
+//
+func Fit(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA {
+	maxW, maxH := width, height
+
+	if maxW <= 0 || maxH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	srcBounds := img.Bounds()
+	srcW := srcBounds.Dx()
+	srcH := srcBounds.Dy()
+
+	if srcW <= 0 || srcH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	if srcW <= maxW && srcH <= maxH {
+		return Clone(img)
+	}
+
+	srcAspectRatio := float64(srcW) / float64(srcH)
+	maxAspectRatio := float64(maxW) / float64(maxH)
+
+	var newW, newH int
+	if srcAspectRatio > maxAspectRatio {
+		newW = maxW
+		newH = int(float64(newW) / srcAspectRatio)
+	} else {
+		newH = maxH
+		newW = int(float64(newH) * srcAspectRatio)
+	}
+
+	return Resize(img, newW, newH, filter)
+}
+
+// Fill creates an image with the specified dimensions and fills it with the scaled source image.
+// To achieve the correct aspect ratio without stretching, the source image will be cropped.
+//
+// Example:
+//
+//	dstImage := imaging.Fill(srcImage, 800, 600, imaging.Center, imaging.Lanczos)
+//
+func Fill(img image.Image, width, height int, anchor Anchor, filter ResampleFilter) *image.NRGBA {
+	dstW, dstH := width, height
+
+	if dstW <= 0 || dstH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	srcBounds := img.Bounds()
+	srcW := srcBounds.Dx()
+	srcH := srcBounds.Dy()
+
+	if srcW <= 0 || srcH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	if srcW == dstW && srcH == dstH {
+		return Clone(img)
+	}
+
+	if srcW >= 100 && srcH >= 100 {
+		return cropAndResize(img, dstW, dstH, anchor, filter)
+	}
+	return resizeAndCrop(img, dstW, dstH, anchor, filter)
+}
+
+// cropAndResize crops the image to the smallest possible size that has the required aspect ratio using
+// the given anchor point, then scales it to the specified dimensions and returns the transformed image.
+//
+// This is generally faster than resizing first, but may result in inaccuracies when used on small source images.
+func cropAndResize(img image.Image, width, height int, anchor Anchor, filter ResampleFilter) *image.NRGBA {
+	dstW, dstH := width, height
+
+	srcBounds := img.Bounds()
+	srcW := srcBounds.Dx()
+	srcH := srcBounds.Dy()
+	srcAspectRatio := float64(srcW) / float64(srcH)
+	dstAspectRatio := float64(dstW) / float64(dstH)
+
+	var tmp *image.NRGBA
+	if srcAspectRatio < dstAspectRatio {
+		cropH := float64(srcW) * float64(dstH) / float64(dstW)
+		tmp = CropAnchor(img, srcW, int(math.Max(1, cropH)+0.5), anchor)
+	} else {
+		cropW := float64(srcH) * float64(dstW) / float64(dstH)
+		tmp = CropAnchor(img, int(math.Max(1, cropW)+0.5), srcH, anchor)
+	}
+
+	return Resize(tmp, dstW, dstH, filter)
+}
+
+// resizeAndCrop resizes the image to the smallest possible size that will cover the specified dimensions,
+// crops the resized image to the specified dimensions using the given anchor point and returns
+// the transformed image.
+func resizeAndCrop(img image.Image, width, height int, anchor Anchor, filter ResampleFilter) *image.NRGBA {
+	dstW, dstH := width, height
+
+	srcBounds := img.Bounds()
+	srcW := srcBounds.Dx()
+	srcH := srcBounds.Dy()
+	srcAspectRatio := float64(srcW) / float64(srcH)
+	dstAspectRatio := float64(dstW) / float64(dstH)
+
+	var tmp *image.NRGBA
+	if srcAspectRatio < dstAspectRatio {
+		tmp = Resize(img, dstW, 0, filter)
+	} else {
+		tmp = Resize(img, 0, dstH, filter)
+	}
+
+	return CropAnchor(tmp, dstW, dstH, anchor)
+}
+
+// Thumbnail scales the image up or down using the specified resample filter, crops it
+// to the specified width and hight and returns the transformed image.
+//
+// Example:
+//
+//	dstImage := imaging.Thumbnail(srcImage, 100, 100, imaging.Lanczos)
+//
+func Thumbnail(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA {
+	return Fill(img, width, height, Center, filter)
+}
+
+// ResampleFilter specifies a resampling filter to be used for image resizing.
+//
+//	General filter recommendations:
+//
+//	- Lanczos
+//		A high-quality resampling filter for photographic images yielding sharp results.
+//
+//	- CatmullRom
+//		A sharp cubic filter that is faster than Lanczos filter while providing similar results.
+//
+//	- MitchellNetravali
+//		A cubic filter that produces smoother results with less ringing artifacts than CatmullRom.
+//
+//	- Linear
+//		Bilinear resampling filter, produces a smooth output. Faster than cubic filters.
+//
+//	- Box
+//		Simple and fast averaging filter appropriate for downscaling.
+//		When upscaling it's similar to NearestNeighbor.
+//
+//	- NearestNeighbor
+//		Fastest resampling filter, no antialiasing.
+//
+type ResampleFilter struct {
+	Support float64
+	Kernel  func(float64) float64
+}
+
+// NearestNeighbor is a nearest-neighbor filter (no anti-aliasing).
+var NearestNeighbor ResampleFilter
+
+// Box filter (averaging pixels).
+var Box ResampleFilter
+
+// Linear filter.
+var Linear ResampleFilter
+
+// Hermite cubic spline filter (BC-spline; B=0; C=0).
+var Hermite ResampleFilter
+
+// MitchellNetravali is Mitchell-Netravali cubic filter (BC-spline; B=1/3; C=1/3).
+var MitchellNetravali ResampleFilter
+
+// CatmullRom is a Catmull-Rom - sharp cubic filter (BC-spline; B=0; C=0.5).
+var CatmullRom ResampleFilter
+
+// BSpline is a smooth cubic filter (BC-spline; B=1; C=0).
+var BSpline ResampleFilter
+
+// Gaussian is a Gaussian blurring filter.
+var Gaussian ResampleFilter
+
+// Bartlett is a Bartlett-windowed sinc filter (3 lobes).
+var Bartlett ResampleFilter
+
+// Lanczos filter (3 lobes).
+var Lanczos ResampleFilter
+
+// Hann is a Hann-windowed sinc filter (3 lobes).
+var Hann ResampleFilter
+
+// Hamming is a Hamming-windowed sinc filter (3 lobes).
+var Hamming ResampleFilter
+
+// Blackman is a Blackman-windowed sinc filter (3 lobes).
+var Blackman ResampleFilter
+
+// Welch is a Welch-windowed sinc filter (parabolic window, 3 lobes).
+var Welch ResampleFilter
+
+// Cosine is a Cosine-windowed sinc filter (3 lobes).
+var Cosine ResampleFilter
+
+func bcspline(x, b, c float64) float64 {
+	var y float64
+	x = math.Abs(x)
+	if x < 1.0 {
+		y = ((12-9*b-6*c)*x*x*x + (-18+12*b+6*c)*x*x + (6 - 2*b)) / 6
+	} else if x < 2.0 {
+		y = ((-b-6*c)*x*x*x + (6*b+30*c)*x*x + (-12*b-48*c)*x + (8*b + 24*c)) / 6
+	}
+	return y
+}
+
+func sinc(x float64) float64 {
+	if x == 0 {
+		return 1
+	}
+	return math.Sin(math.Pi*x) / (math.Pi * x)
+}
+
+func init() {
+	NearestNeighbor = ResampleFilter{
+		Support: 0.0, // special case - not applying the filter
+	}
+
+	Box = ResampleFilter{
+		Support: 0.5,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x <= 0.5 {
+				return 1.0
+			}
+			return 0
+		},
+	}
+
+	Linear = ResampleFilter{
+		Support: 1.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 1.0 {
+				return 1.0 - x
+			}
+			return 0
+		},
+	}
+
+	Hermite = ResampleFilter{
+		Support: 1.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 1.0 {
+				return bcspline(x, 0.0, 0.0)
+			}
+			return 0
+		},
+	}
+
+	MitchellNetravali = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return bcspline(x, 1.0/3.0, 1.0/3.0)
+			}
+			return 0
+		},
+	}
+
+	CatmullRom = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return bcspline(x, 0.0, 0.5)
+			}
+			return 0
+		},
+	}
+
+	BSpline = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return bcspline(x, 1.0, 0.0)
+			}
+			return 0
+		},
+	}
+
+	Gaussian = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return math.Exp(-2 * x * x)
+			}
+			return 0
+		},
+	}
+
+	Bartlett = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (3.0 - x) / 3.0
+			}
+			return 0
+		},
+	}
+
+	Lanczos = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * sinc(x/3.0)
+			}
+			return 0
+		},
+	}
+
+	Hann = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (0.5 + 0.5*math.Cos(math.Pi*x/3.0))
+			}
+			return 0
+		},
+	}
+
+	Hamming = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (0.54 + 0.46*math.Cos(math.Pi*x/3.0))
+			}
+			return 0
+		},
+	}
+
+	Blackman = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (0.42 - 0.5*math.Cos(math.Pi*x/3.0+math.Pi) + 0.08*math.Cos(2.0*math.Pi*x/3.0))
+			}
+			return 0
+		},
+	}
+
+	Welch = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (1.0 - (x * x / 9.0))
+			}
+			return 0
+		},
+	}
+
+	Cosine = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * math.Cos((math.Pi/2.0)*(x/3.0))
+			}
+			return 0
+		},
+	}
+}

vendor/github.com/disintegration/imaging/scanner.go

@@ -0,0 +1,285 @@
+package imaging
+
+import (
+	"image"
+	"image/color"
+)
+
+type scanner struct {
+	image   image.Image
+	w, h    int
+	palette []color.NRGBA
+}
+
+func newScanner(img image.Image) *scanner {
+	s := &scanner{
+		image: img,
+		w:     img.Bounds().Dx(),
+		h:     img.Bounds().Dy(),
+	}
+	if img, ok := img.(*image.Paletted); ok {
+		s.palette = make([]color.NRGBA, len(img.Palette))
+		for i := 0; i < len(img.Palette); i++ {
+			s.palette[i] = color.NRGBAModel.Convert(img.Palette[i]).(color.NRGBA)
+		}
+	}
+	return s
+}
+
+// scan scans the given rectangular region of the image into dst.
+func (s *scanner) scan(x1, y1, x2, y2 int, dst []uint8) {
+	switch img := s.image.(type) {
+	case *image.NRGBA:
+		size := (x2 - x1) * 4
+		j := 0
+		i := y1*img.Stride + x1*4
+		if size == 4 {
+			for y := y1; y < y2; y++ {
+				d := dst[j : j+4 : j+4]
+				s := img.Pix[i : i+4 : i+4]
+				d[0] = s[0]
+				d[1] = s[1]
+				d[2] = s[2]
+				d[3] = s[3]
+				j += size
+				i += img.Stride
+			}
+		} else {
+			for y := y1; y < y2; y++ {
+				copy(dst[j:j+size], img.Pix[i:i+size])
+				j += size
+				i += img.Stride
+			}
+		}
+
+	case *image.NRGBA64:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1*8
+			for x := x1; x < x2; x++ {
+				s := img.Pix[i : i+8 : i+8]
+				d := dst[j : j+4 : j+4]
+				d[0] = s[0]
+				d[1] = s[2]
+				d[2] = s[4]
+				d[3] = s[6]
+				j += 4
+				i += 8
+			}
+		}
+
+	case *image.RGBA:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1*4
+			for x := x1; x < x2; x++ {
+				d := dst[j : j+4 : j+4]
+				a := img.Pix[i+3]
+				switch a {
+				case 0:
+					d[0] = 0
+					d[1] = 0
+					d[2] = 0
+					d[3] = a
+				case 0xff:
+					s := img.Pix[i : i+4 : i+4]
+					d[0] = s[0]
+					d[1] = s[1]
+					d[2] = s[2]
+					d[3] = a
+				default:
+					s := img.Pix[i : i+4 : i+4]
+					r16 := uint16(s[0])
+					g16 := uint16(s[1])
+					b16 := uint16(s[2])
+					a16 := uint16(a)
+					d[0] = uint8(r16 * 0xff / a16)
+					d[1] = uint8(g16 * 0xff / a16)
+					d[2] = uint8(b16 * 0xff / a16)
+					d[3] = a
+				}
+				j += 4
+				i += 4
+			}
+		}
+
+	case *image.RGBA64:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1*8
+			for x := x1; x < x2; x++ {
+				s := img.Pix[i : i+8 : i+8]
+				d := dst[j : j+4 : j+4]
+				a := s[6]
+				switch a {
+				case 0:
+					d[0] = 0
+					d[1] = 0
+					d[2] = 0
+				case 0xff:
+					d[0] = s[0]
+					d[1] = s[2]
+					d[2] = s[4]
+				default:
+					r32 := uint32(s[0])<<8 | uint32(s[1])
+					g32 := uint32(s[2])<<8 | uint32(s[3])
+					b32 := uint32(s[4])<<8 | uint32(s[5])
+					a32 := uint32(s[6])<<8 | uint32(s[7])
+					d[0] = uint8((r32 * 0xffff / a32) >> 8)
+					d[1] = uint8((g32 * 0xffff / a32) >> 8)
+					d[2] = uint8((b32 * 0xffff / a32) >> 8)
+				}
+				d[3] = a
+				j += 4
+				i += 8
+			}
+		}
+
+	case *image.Gray:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1
+			for x := x1; x < x2; x++ {
+				c := img.Pix[i]
+				d := dst[j : j+4 : j+4]
+				d[0] = c
+				d[1] = c
+				d[2] = c
+				d[3] = 0xff
+				j += 4
+				i++
+			}
+		}
+
+	case *image.Gray16:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1*2
+			for x := x1; x < x2; x++ {
+				c := img.Pix[i]
+				d := dst[j : j+4 : j+4]
+				d[0] = c
+				d[1] = c
+				d[2] = c
+				d[3] = 0xff
+				j += 4
+				i += 2
+			}
+		}
+
+	case *image.YCbCr:
+		j := 0
+		x1 += img.Rect.Min.X
+		x2 += img.Rect.Min.X
+		y1 += img.Rect.Min.Y
+		y2 += img.Rect.Min.Y
+
+		hy := img.Rect.Min.Y / 2
+		hx := img.Rect.Min.X / 2
+		for y := y1; y < y2; y++ {
+			iy := (y-img.Rect.Min.Y)*img.YStride + (x1 - img.Rect.Min.X)
+
+			var yBase int
+			switch img.SubsampleRatio {
+			case image.YCbCrSubsampleRatio444, image.YCbCrSubsampleRatio422:
+				yBase = (y - img.Rect.Min.Y) * img.CStride
+			case image.YCbCrSubsampleRatio420, image.YCbCrSubsampleRatio440:
+				yBase = (y/2 - hy) * img.CStride
+			}
+
+			for x := x1; x < x2; x++ {
+				var ic int
+				switch img.SubsampleRatio {
+				case image.YCbCrSubsampleRatio444, image.YCbCrSubsampleRatio440:
+					ic = yBase + (x - img.Rect.Min.X)
+				case image.YCbCrSubsampleRatio422, image.YCbCrSubsampleRatio420:
+					ic = yBase + (x/2 - hx)
+				default:
+					ic = img.COffset(x, y)
+				}
+
+				yy1 := int32(img.Y[iy]) * 0x10101
+				cb1 := int32(img.Cb[ic]) - 128
+				cr1 := int32(img.Cr[ic]) - 128
+
+				r := yy1 + 91881*cr1
+				if uint32(r)&0xff000000 == 0 {
+					r >>= 16
+				} else {
+					r = ^(r >> 31)
+				}
+
+				g := yy1 - 22554*cb1 - 46802*cr1
+				if uint32(g)&0xff000000 == 0 {
+					g >>= 16
+				} else {
+					g = ^(g >> 31)
+				}
+
+				b := yy1 + 116130*cb1
+				if uint32(b)&0xff000000 == 0 {
+					b >>= 16
+				} else {
+					b = ^(b >> 31)
+				}
+
+				d := dst[j : j+4 : j+4]
+				d[0] = uint8(r)
+				d[1] = uint8(g)
+				d[2] = uint8(b)
+				d[3] = 0xff
+
+				iy++
+				j += 4
+			}
+		}
+
+	case *image.Paletted:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1
+			for x := x1; x < x2; x++ {
+				c := s.palette[img.Pix[i]]
+				d := dst[j : j+4 : j+4]
+				d[0] = c.R
+				d[1] = c.G
+				d[2] = c.B
+				d[3] = c.A
+				j += 4
+				i++
+			}
+		}
+
+	default:
+		j := 0
+		b := s.image.Bounds()
+		x1 += b.Min.X
+		x2 += b.Min.X
+		y1 += b.Min.Y
+		y2 += b.Min.Y
+		for y := y1; y < y2; y++ {
+			for x := x1; x < x2; x++ {
+				r16, g16, b16, a16 := s.image.At(x, y).RGBA()
+				d := dst[j : j+4 : j+4]
+				switch a16 {
+				case 0xffff:
+					d[0] = uint8(r16 >> 8)
+					d[1] = uint8(g16 >> 8)
+					d[2] = uint8(b16 >> 8)
+					d[3] = 0xff
+				case 0:
+					d[0] = 0
+					d[1] = 0
+					d[2] = 0
+					d[3] = 0
+				default:
+					d[0] = uint8(((r16 * 0xffff) / a16) >> 8)
+					d[1] = uint8(((g16 * 0xffff) / a16) >> 8)
+					d[2] = uint8(((b16 * 0xffff) / a16) >> 8)
+					d[3] = uint8(a16 >> 8)
+				}
+				j += 4
+			}
+		}
+	}
+}

vendor/github.com/disintegration/imaging/tools.go

@@ -0,0 +1,249 @@
+package imaging
+
+import (
+	"bytes"
+	"image"
+	"image/color"
+	"math"
+)
+
+// New creates a new image with the specified width and height, and fills it with the specified color.
+func New(width, height int, fillColor color.Color) *image.NRGBA {
+	if width <= 0 || height <= 0 {
+		return &image.NRGBA{}
+	}
+
+	c := color.NRGBAModel.Convert(fillColor).(color.NRGBA)
+	if (c == color.NRGBA{0, 0, 0, 0}) {
+		return image.NewNRGBA(image.Rect(0, 0, width, height))
+	}
+
+	return &image.NRGBA{
+		Pix:    bytes.Repeat([]byte{c.R, c.G, c.B, c.A}, width*height),
+		Stride: 4 * width,
+		Rect:   image.Rect(0, 0, width, height),
+	}
+}
+
+// Clone returns a copy of the given image.
+func Clone(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	size := src.w * 4
+	parallel(0, src.h, func(ys <-chan int) {
+		for y := range ys {
+			i := y * dst.Stride
+			src.scan(0, y, src.w, y+1, dst.Pix[i:i+size])
+		}
+	})
+	return dst
+}
+
+// Anchor is the anchor point for image alignment.
+type Anchor int
+
+// Anchor point positions.
+const (
+	Center Anchor = iota
+	TopLeft
+	Top
+	TopRight
+	Left
+	Right
+	BottomLeft
+	Bottom
+	BottomRight
+)
+
+func anchorPt(b image.Rectangle, w, h int, anchor Anchor) image.Point {
+	var x, y int
+	switch anchor {
+	case TopLeft:
+		x = b.Min.X
+		y = b.Min.Y
+	case Top:
+		x = b.Min.X + (b.Dx()-w)/2
+		y = b.Min.Y
+	case TopRight:
+		x = b.Max.X - w
+		y = b.Min.Y
+	case Left:
+		x = b.Min.X
+		y = b.Min.Y + (b.Dy()-h)/2
+	case Right:
+		x = b.Max.X - w
+		y = b.Min.Y + (b.Dy()-h)/2
+	case BottomLeft:
+		x = b.Min.X
+		y = b.Max.Y - h
+	case Bottom:
+		x = b.Min.X + (b.Dx()-w)/2
+		y = b.Max.Y - h
+	case BottomRight:
+		x = b.Max.X - w
+		y = b.Max.Y - h
+	default:
+		x = b.Min.X + (b.Dx()-w)/2
+		y = b.Min.Y + (b.Dy()-h)/2
+	}
+	return image.Pt(x, y)
+}
+
+// Crop cuts out a rectangular region with the specified bounds
+// from the image and returns the cropped image.
+func Crop(img image.Image, rect image.Rectangle) *image.NRGBA {
+	r := rect.Intersect(img.Bounds()).Sub(img.Bounds().Min)
+	if r.Empty() {
+		return &image.NRGBA{}
+	}
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, r.Dx(), r.Dy()))
+	rowSize := r.Dx() * 4
+	parallel(r.Min.Y, r.Max.Y, func(ys <-chan int) {
+		for y := range ys {
+			i := (y - r.Min.Y) * dst.Stride
+			src.scan(r.Min.X, y, r.Max.X, y+1, dst.Pix[i:i+rowSize])
+		}
+	})
+	return dst
+}
+
+// CropAnchor cuts out a rectangular region with the specified size
+// from the image using the specified anchor point and returns the cropped image.
+func CropAnchor(img image.Image, width, height int, anchor Anchor) *image.NRGBA {
+	srcBounds := img.Bounds()
+	pt := anchorPt(srcBounds, width, height, anchor)
+	r := image.Rect(0, 0, width, height).Add(pt)
+	b := srcBounds.Intersect(r)
+	return Crop(img, b)
+}
+
+// CropCenter cuts out a rectangular region with the specified size
+// from the center of the image and returns the cropped image.
+func CropCenter(img image.Image, width, height int) *image.NRGBA {
+	return CropAnchor(img, width, height, Center)
+}
+
+// Paste pastes the img image to the background image at the specified position and returns the combined image.
+func Paste(background, img image.Image, pos image.Point) *image.NRGBA {
+	dst := Clone(background)
+	pos = pos.Sub(background.Bounds().Min)
+	pasteRect := image.Rectangle{Min: pos, Max: pos.Add(img.Bounds().Size())}
+	interRect := pasteRect.Intersect(dst.Bounds())
+	if interRect.Empty() {
+		return dst
+	}
+	src := newScanner(img)
+	parallel(interRect.Min.Y, interRect.Max.Y, func(ys <-chan int) {
+		for y := range ys {
+			x1 := interRect.Min.X - pasteRect.Min.X
+			x2 := interRect.Max.X - pasteRect.Min.X
+			y1 := y - pasteRect.Min.Y
+			y2 := y1 + 1
+			i1 := y*dst.Stride + interRect.Min.X*4
+			i2 := i1 + interRect.Dx()*4
+			src.scan(x1, y1, x2, y2, dst.Pix[i1:i2])
+		}
+	})
+	return dst
+}
+
+// PasteCenter pastes the img image to the center of the background image and returns the combined image.
+func PasteCenter(background, img image.Image) *image.NRGBA {
+	bgBounds := background.Bounds()
+	bgW := bgBounds.Dx()
+	bgH := bgBounds.Dy()
+	bgMinX := bgBounds.Min.X
+	bgMinY := bgBounds.Min.Y
+
+	centerX := bgMinX + bgW/2
+	centerY := bgMinY + bgH/2
+
+	x0 := centerX - img.Bounds().Dx()/2
+	y0 := centerY - img.Bounds().Dy()/2
+
+	return Paste(background, img, image.Pt(x0, y0))
+}
+
+// Overlay draws the img image over the background image at given position
+// and returns the combined image. Opacity parameter is the opacity of the img
+// image layer, used to compose the images, it must be from 0.0 to 1.0.
+//
+// Examples:
+//
+//	// Draw spriteImage over backgroundImage at the given position (x=50, y=50).
+//	dstImage := imaging.Overlay(backgroundImage, spriteImage, image.Pt(50, 50), 1.0)
+//
+//	// Blend two opaque images of the same size.
+//	dstImage := imaging.Overlay(imageOne, imageTwo, image.Pt(0, 0), 0.5)
+//
+func Overlay(background, img image.Image, pos image.Point, opacity float64) *image.NRGBA {
+	opacity = math.Min(math.Max(opacity, 0.0), 1.0) // Ensure 0.0 <= opacity <= 1.0.
+	dst := Clone(background)
+	pos = pos.Sub(background.Bounds().Min)
+	pasteRect := image.Rectangle{Min: pos, Max: pos.Add(img.Bounds().Size())}
+	interRect := pasteRect.Intersect(dst.Bounds())
+	if interRect.Empty() {
+		return dst
+	}
+	src := newScanner(img)
+	parallel(interRect.Min.Y, interRect.Max.Y, func(ys <-chan int) {
+		scanLine := make([]uint8, interRect.Dx()*4)
+		for y := range ys {
+			x1 := interRect.Min.X - pasteRect.Min.X
+			x2 := interRect.Max.X - pasteRect.Min.X
+			y1 := y - pasteRect.Min.Y
+			y2 := y1 + 1
+			src.scan(x1, y1, x2, y2, scanLine)
+			i := y*dst.Stride + interRect.Min.X*4
+			j := 0
+			for x := interRect.Min.X; x < interRect.Max.X; x++ {
+				d := dst.Pix[i : i+4 : i+4]
+				r1 := float64(d[0])
+				g1 := float64(d[1])
+				b1 := float64(d[2])
+				a1 := float64(d[3])
+
+				s := scanLine[j : j+4 : j+4]
+				r2 := float64(s[0])
+				g2 := float64(s[1])
+				b2 := float64(s[2])
+				a2 := float64(s[3])
+
+				coef2 := opacity * a2 / 255
+				coef1 := (1 - coef2) * a1 / 255
+				coefSum := coef1 + coef2
+				coef1 /= coefSum
+				coef2 /= coefSum
+
+				d[0] = uint8(r1*coef1 + r2*coef2)
+				d[1] = uint8(g1*coef1 + g2*coef2)
+				d[2] = uint8(b1*coef1 + b2*coef2)
+				d[3] = uint8(math.Min(a1+a2*opacity*(255-a1)/255, 255))
+
+				i += 4
+				j += 4
+			}
+		}
+	})
+	return dst
+}
+
+// OverlayCenter overlays the img image to the center of the background image and
+// returns the combined image. Opacity parameter is the opacity of the img
+// image layer, used to compose the images, it must be from 0.0 to 1.0.
+func OverlayCenter(background, img image.Image, opacity float64) *image.NRGBA {
+	bgBounds := background.Bounds()
+	bgW := bgBounds.Dx()
+	bgH := bgBounds.Dy()
+	bgMinX := bgBounds.Min.X
+	bgMinY := bgBounds.Min.Y
+
+	centerX := bgMinX + bgW/2
+	centerY := bgMinY + bgH/2
+
+	x0 := centerX - img.Bounds().Dx()/2
+	y0 := centerY - img.Bounds().Dy()/2
+
+	return Overlay(background, img, image.Point{x0, y0}, opacity)
+}

vendor/github.com/disintegration/imaging/transform.go

@@ -0,0 +1,268 @@
+package imaging
+
+import (
+	"image"
+	"image/color"
+	"math"
+)
+
+// FlipH flips the image horizontally (from left to right) and returns the transformed image.
+func FlipH(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.w
+	dstH := src.h
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcY := dstY
+			src.scan(0, srcY, src.w, srcY+1, dst.Pix[i:i+rowSize])
+			reverse(dst.Pix[i : i+rowSize])
+		}
+	})
+	return dst
+}
+
+// FlipV flips the image vertically (from top to bottom) and returns the transformed image.
+func FlipV(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.w
+	dstH := src.h
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcY := dstH - dstY - 1
+			src.scan(0, srcY, src.w, srcY+1, dst.Pix[i:i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Transpose flips the image horizontally and rotates 90 degrees counter-clockwise.
+func Transpose(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.h
+	dstH := src.w
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcX := dstY
+			src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Transverse flips the image vertically and rotates 90 degrees counter-clockwise.
+func Transverse(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.h
+	dstH := src.w
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcX := dstH - dstY - 1
+			src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize])
+			reverse(dst.Pix[i : i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Rotate90 rotates the image 90 degrees counter-clockwise and returns the transformed image.
+func Rotate90(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.h
+	dstH := src.w
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcX := dstH - dstY - 1
+			src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Rotate180 rotates the image 180 degrees counter-clockwise and returns the transformed image.
+func Rotate180(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.w
+	dstH := src.h
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcY := dstH - dstY - 1
+			src.scan(0, srcY, src.w, srcY+1, dst.Pix[i:i+rowSize])
+			reverse(dst.Pix[i : i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Rotate270 rotates the image 270 degrees counter-clockwise and returns the transformed image.
+func Rotate270(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.h
+	dstH := src.w
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcX := dstY
+			src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize])
+			reverse(dst.Pix[i : i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Rotate rotates an image by the given angle counter-clockwise .
+// The angle parameter is the rotation angle in degrees.
+// The bgColor parameter specifies the color of the uncovered zone after the rotation.
+func Rotate(img image.Image, angle float64, bgColor color.Color) *image.NRGBA {
+	angle = angle - math.Floor(angle/360)*360
+
+	switch angle {
+	case 0:
+		return Clone(img)
+	case 90:
+		return Rotate90(img)
+	case 180:
+		return Rotate180(img)
+	case 270:
+		return Rotate270(img)
+	}
+
+	src := toNRGBA(img)
+	srcW := src.Bounds().Max.X
+	srcH := src.Bounds().Max.Y
+	dstW, dstH := rotatedSize(srcW, srcH, angle)
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+
+	if dstW <= 0 || dstH <= 0 {
+		return dst
+	}
+
+	srcXOff := float64(srcW)/2 - 0.5
+	srcYOff := float64(srcH)/2 - 0.5
+	dstXOff := float64(dstW)/2 - 0.5
+	dstYOff := float64(dstH)/2 - 0.5
+
+	bgColorNRGBA := color.NRGBAModel.Convert(bgColor).(color.NRGBA)
+	sin, cos := math.Sincos(math.Pi * angle / 180)
+
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			for dstX := 0; dstX < dstW; dstX++ {
+				xf, yf := rotatePoint(float64(dstX)-dstXOff, float64(dstY)-dstYOff, sin, cos)
+				xf, yf = xf+srcXOff, yf+srcYOff
+				interpolatePoint(dst, dstX, dstY, src, xf, yf, bgColorNRGBA)
+			}
+		}
+	})
+
+	return dst
+}
+
+func rotatePoint(x, y, sin, cos float64) (float64, float64) {
+	return x*cos - y*sin, x*sin + y*cos
+}
+
+func rotatedSize(w, h int, angle float64) (int, int) {
+	if w <= 0 || h <= 0 {
+		return 0, 0
+	}
+
+	sin, cos := math.Sincos(math.Pi * angle / 180)
+	x1, y1 := rotatePoint(float64(w-1), 0, sin, cos)
+	x2, y2 := rotatePoint(float64(w-1), float64(h-1), sin, cos)
+	x3, y3 := rotatePoint(0, float64(h-1), sin, cos)
+
+	minx := math.Min(x1, math.Min(x2, math.Min(x3, 0)))
+	maxx := math.Max(x1, math.Max(x2, math.Max(x3, 0)))
+	miny := math.Min(y1, math.Min(y2, math.Min(y3, 0)))
+	maxy := math.Max(y1, math.Max(y2, math.Max(y3, 0)))
+
+	neww := maxx - minx + 1
+	if neww-math.Floor(neww) > 0.1 {
+		neww++
+	}
+	newh := maxy - miny + 1
+	if newh-math.Floor(newh) > 0.1 {
+		newh++
+	}
+
+	return int(neww), int(newh)
+}
+
+func interpolatePoint(dst *image.NRGBA, dstX, dstY int, src *image.NRGBA, xf, yf float64, bgColor color.NRGBA) {
+	j := dstY*dst.Stride + dstX*4
+	d := dst.Pix[j : j+4 : j+4]
+
+	x0 := int(math.Floor(xf))
+	y0 := int(math.Floor(yf))
+	bounds := src.Bounds()
+	if !image.Pt(x0, y0).In(image.Rect(bounds.Min.X-1, bounds.Min.Y-1, bounds.Max.X, bounds.Max.Y)) {
+		d[0] = bgColor.R
+		d[1] = bgColor.G
+		d[2] = bgColor.B
+		d[3] = bgColor.A
+		return
+	}
+
+	xq := xf - float64(x0)
+	yq := yf - float64(y0)
+	points := [4]image.Point{
+		{x0, y0},
+		{x0 + 1, y0},
+		{x0, y0 + 1},
+		{x0 + 1, y0 + 1},
+	}
+	weights := [4]float64{
+		(1 - xq) * (1 - yq),
+		xq * (1 - yq),
+		(1 - xq) * yq,
+		xq * yq,
+	}
+
+	var r, g, b, a float64
+	for i := 0; i < 4; i++ {
+		p := points[i]
+		w := weights[i]
+		if p.In(bounds) {
+			i := p.Y*src.Stride + p.X*4
+			s := src.Pix[i : i+4 : i+4]
+			wa := float64(s[3]) * w
+			r += float64(s[0]) * wa
+			g += float64(s[1]) * wa
+			b += float64(s[2]) * wa
+			a += wa
+		} else {
+			wa := float64(bgColor.A) * w
+			r += float64(bgColor.R) * wa
+			g += float64(bgColor.G) * wa
+			b += float64(bgColor.B) * wa
+			a += wa
+		}
+	}
+	if a != 0 {
+		aInv := 1 / a
+		d[0] = clamp(r * aInv)
+		d[1] = clamp(g * aInv)
+		d[2] = clamp(b * aInv)
+		d[3] = clamp(a)
+	}
+}

vendor/github.com/disintegration/imaging/utils.go

@@ -0,0 +1,167 @@
+package imaging
+
+import (
+	"image"
+	"math"
+	"runtime"
+	"sync"
+)
+
+// parallel processes the data in separate goroutines.
+func parallel(start, stop int, fn func(<-chan int)) {
+	count := stop - start
+	if count < 1 {
+		return
+	}
+
+	procs := runtime.GOMAXPROCS(0)
+	if procs > count {
+		procs = count
+	}
+
+	c := make(chan int, count)
+	for i := start; i < stop; i++ {
+		c <- i
+	}
+	close(c)
+
+	var wg sync.WaitGroup
+	for i := 0; i < procs; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			fn(c)
+		}()
+	}
+	wg.Wait()
+}
+
+// absint returns the absolute value of i.
+func absint(i int) int {
+	if i < 0 {
+		return -i
+	}
+	return i
+}
+
+// clamp rounds and clamps float64 value to fit into uint8.
+func clamp(x float64) uint8 {
+	v := int64(x + 0.5)
+	if v > 255 {
+		return 255
+	}
+	if v > 0 {
+		return uint8(v)
+	}
+	return 0
+}
+
+func reverse(pix []uint8) {
+	if len(pix) <= 4 {
+		return
+	}
+	i := 0
+	j := len(pix) - 4
+	for i < j {
+		pi := pix[i : i+4 : i+4]
+		pj := pix[j : j+4 : j+4]
+		pi[0], pj[0] = pj[0], pi[0]
+		pi[1], pj[1] = pj[1], pi[1]
+		pi[2], pj[2] = pj[2], pi[2]
+		pi[3], pj[3] = pj[3], pi[3]
+		i += 4
+		j -= 4
+	}
+}
+
+func toNRGBA(img image.Image) *image.NRGBA {
+	if img, ok := img.(*image.NRGBA); ok {
+		return &image.NRGBA{
+			Pix:    img.Pix,
+			Stride: img.Stride,
+			Rect:   img.Rect.Sub(img.Rect.Min),
+		}
+	}
+	return Clone(img)
+}
+
+// rgbToHSL converts a color from RGB to HSL.
+func rgbToHSL(r, g, b uint8) (float64, float64, float64) {
+	rr := float64(r) / 255
+	gg := float64(g) / 255
+	bb := float64(b) / 255
+
+	max := math.Max(rr, math.Max(gg, bb))
+	min := math.Min(rr, math.Min(gg, bb))
+
+	l := (max + min) / 2
+
+	if max == min {
+		return 0, 0, l
+	}
+
+	var h, s float64
+	d := max - min
+	if l > 0.5 {
+		s = d / (2 - max - min)
+	} else {
+		s = d / (max + min)
+	}
+
+	switch max {
+	case rr:
+		h = (gg - bb) / d
+		if g < b {
+			h += 6
+		}
+	case gg:
+		h = (bb-rr)/d + 2
+	case bb:
+		h = (rr-gg)/d + 4
+	}
+	h /= 6
+
+	return h, s, l
+}
+
+// hslToRGB converts a color from HSL to RGB.
+func hslToRGB(h, s, l float64) (uint8, uint8, uint8) {
+	var r, g, b float64
+	if s == 0 {
+		v := clamp(l * 255)
+		return v, v, v
+	}
+
+	var q float64
+	if l < 0.5 {
+		q = l * (1 + s)
+	} else {
+		q = l + s - l*s
+	}
+	p := 2*l - q
+
+	r = hueToRGB(p, q, h+1/3.0)
+	g = hueToRGB(p, q, h)
+	b = hueToRGB(p, q, h-1/3.0)
+
+	return clamp(r * 255), clamp(g * 255), clamp(b * 255)
+}
+
+func hueToRGB(p, q, t float64) float64 {
+	if t < 0 {
+		t++
+	}
+	if t > 1 {
+		t--
+	}
+	if t < 1/6.0 {
+		return p + (q-p)*6*t
+	}
+	if t < 1/2.0 {
+		return q
+	}
+	if t < 2/3.0 {
+		return p + (q-p)*(2/3.0-t)*6
+	}
+	return p
+}

vendor/github.com/sirupsen/logrus/.gitignore

@@ -1,4 +0,0 @@
-logrus
-vendor
-
-.idea/

vendor/github.com/sirupsen/logrus/.golangci.yml

@@ -1,40 +0,0 @@
-run:
-  # do not run on test files yet
-  tests: false
-
-# all available settings of specific linters
-linters-settings:
-  errcheck:
-    # report about not checking of errors in type assetions: `a := b.(MyStruct)`;
-    # default is false: such cases aren't reported by default.
-    check-type-assertions: false
-
-    # report about assignment of errors to blank identifier: `num, _ := strconv.Atoi(numStr)`;
-    # default is false: such cases aren't reported by default.
-    check-blank: false
-
-  lll:
-    line-length: 100
-    tab-width: 4
-
-  prealloc:
-    simple: false
-    range-loops: false
-    for-loops: false
-
-  whitespace:
-    multi-if: false   # Enforces newlines (or comments) after every multi-line if statement
-    multi-func: false # Enforces newlines (or comments) after every multi-line function signature
-
-linters:
-  enable:
-    - megacheck
-    - govet
-  disable:
-    - maligned
-    - prealloc
-  disable-all: false
-  presets:
-    - bugs
-    - unused
-  fast: false

vendor/github.com/sirupsen/logrus/.travis.yml

@@ -1,15 +0,0 @@
-language: go
-go_import_path: github.com/sirupsen/logrus
-git:
-  depth: 1
-env:
-  - GO111MODULE=on
-go: 1.15.x
-os: linux
-install:
-  - ./travis/install.sh
-script:
-  - cd ci
-  - go run mage.go -v -w ../ crossBuild
-  - go run mage.go -v -w ../ lint
-  - go run mage.go -v -w ../ test

vendor/github.com/sirupsen/logrus/CHANGELOG.md

@@ -1,259 +0,0 @@
-# 1.8.1
-Code quality:
-  * move magefile in its own subdir/submodule to remove magefile dependency on logrus consumer
-  * improve timestamp format documentation
-
-Fixes:
-  * fix race condition on logger hooks
-
-
-# 1.8.0
-
-Correct versioning number replacing v1.7.1.
-
-# 1.7.1
-
-Beware this release has introduced a new public API and its semver is therefore incorrect.
-
-Code quality:
-  * use go 1.15 in travis
-  * use magefile as task runner
-
-Fixes:
-  * small fixes about new go 1.13 error formatting system
-  * Fix for long time race condiction with mutating data hooks
-
-Features:
-  * build support for zos
-
-# 1.7.0
-Fixes:
-  * the dependency toward a windows terminal library has been removed
-
-Features:
-  * a new buffer pool management API has been added
-  * a set of `<LogLevel>Fn()` functions have been added
-
-# 1.6.0
-Fixes:
-  * end of line cleanup
-  * revert the entry concurrency bug fix whic leads to deadlock under some circumstances
-  * update dependency on go-windows-terminal-sequences to fix a crash with go 1.14
-
-Features:
-  * add an option to the `TextFormatter` to completely disable fields quoting
-
-# 1.5.0
-Code quality:
-  * add golangci linter run on travis
-
-Fixes:
-  * add mutex for hooks concurrent access on `Entry` data
-  * caller function field for go1.14
-  * fix build issue for gopherjs target
-
-Feature:
-  * add an hooks/writer sub-package whose goal is to split output on different stream depending on the trace level
-  * add a `DisableHTMLEscape` option in the `JSONFormatter`
-  * add `ForceQuote` and `PadLevelText` options in the `TextFormatter`
-
-# 1.4.2
-  * Fixes build break for plan9, nacl, solaris
-# 1.4.1
-This new release introduces:
-  * Enhance TextFormatter to not print caller information when they are empty (#944)
-  * Remove dependency on golang.org/x/crypto (#932, #943)
-
-Fixes:
-  * Fix Entry.WithContext method to return a copy of the initial entry (#941)
-
-# 1.4.0
-This new release introduces:
-  * Add `DeferExitHandler`, similar to `RegisterExitHandler` but prepending the handler to the list of handlers (semantically like `defer`) (#848).
-  * Add `CallerPrettyfier` to `JSONFormatter` and `TextFormatter` (#909, #911)
-  * Add `Entry.WithContext()` and `Entry.Context`, to set a context on entries to be used e.g. in hooks (#919).
-
-Fixes:
-  * Fix wrong method calls `Logger.Print` and `Logger.Warningln` (#893).
-  * Update `Entry.Logf` to not do string formatting unless the log level is enabled (#903)
-  * Fix infinite recursion on unknown `Level.String()` (#907)
-  * Fix race condition in `getCaller` (#916).
-
-
-# 1.3.0
-This new release introduces:
-  * Log, Logf, Logln functions for Logger and Entry that take a Level
-
-Fixes:
-  * Building prometheus node_exporter on AIX (#840)
-  * Race condition in TextFormatter (#468)
-  * Travis CI import path (#868)
-  * Remove coloured output on Windows (#862)
-  * Pointer to func as field in JSONFormatter (#870)
-  * Properly marshal Levels (#873)
-
-# 1.2.0
-This new release introduces:
-  * A new method `SetReportCaller` in the `Logger` to enable the file, line and calling function from which the trace has been issued
-  * A new trace level named `Trace` whose level is below `Debug`
-  * A configurable exit function to be called upon a Fatal trace
-  * The `Level` object now implements `encoding.TextUnmarshaler` interface
-
-# 1.1.1
-This is a bug fix release.
-  * fix the build break on Solaris
-  * don't drop a whole trace in JSONFormatter when a field param is a function pointer which can not be serialized
-
-# 1.1.0
-This new release introduces:
-  * several fixes:
-    * a fix for a race condition on entry formatting
-    * proper cleanup of previously used entries before putting them back in the pool
-    * the extra new line at the end of message in text formatter has been removed
-  * a new global public API to check if a level is activated: IsLevelEnabled
-  * the following methods have been added to the Logger object
-    * IsLevelEnabled
-    * SetFormatter
-    * SetOutput
-    * ReplaceHooks
-  * introduction of go module
-  * an indent configuration for the json formatter
-  * output colour support for windows
-  * the field sort function is now configurable for text formatter
-  * the CLICOLOR and CLICOLOR\_FORCE environment variable support in text formater
-
-# 1.0.6
-
-This new release introduces:
-  * a new api WithTime which allows to easily force the time of the log entry
-    which is mostly useful for logger wrapper
-  * a fix reverting the immutability of the entry given as parameter to the hooks
-    a new configuration field of the json formatter in order to put all the fields
-    in a nested dictionnary
-  * a new SetOutput method in the Logger
-  * a new configuration of the textformatter to configure the name of the default keys
-  * a new configuration of the text formatter to disable the level truncation
-
-# 1.0.5
-
-* Fix hooks race (#707)
-* Fix panic deadlock (#695)
-
-# 1.0.4
-
-* Fix race when adding hooks (#612)
-* Fix terminal check in AppEngine (#635)
-
-# 1.0.3
-
-* Replace example files with testable examples
-
-# 1.0.2
-
-* bug: quote non-string values in text formatter (#583)
-* Make (*Logger) SetLevel a public method
-
-# 1.0.1
-
-* bug: fix escaping in text formatter (#575)
-
-# 1.0.0
-
-* Officially changed name to lower-case
-* bug: colors on Windows 10 (#541)
-* bug: fix race in accessing level (#512)
-
-# 0.11.5
-
-* feature: add writer and writerlevel to entry (#372)
-
-# 0.11.4
-
-* bug: fix undefined variable on solaris (#493)
-
-# 0.11.3
-
-* formatter: configure quoting of empty values (#484)
-* formatter: configure quoting character (default is `"`) (#484)
-* bug: fix not importing io correctly in non-linux environments (#481)
-
-# 0.11.2
-
-* bug: fix windows terminal detection (#476)
-
-# 0.11.1
-
-* bug: fix tty detection with custom out (#471)
-
-# 0.11.0
-
-* performance: Use bufferpool to allocate (#370)
-* terminal: terminal detection for app-engine (#343)
-* feature: exit handler (#375)
-
-# 0.10.0
-
-* feature: Add a test hook (#180)
-* feature: `ParseLevel` is now case-insensitive (#326)
-* feature: `FieldLogger` interface that generalizes `Logger` and `Entry` (#308)
-* performance: avoid re-allocations on `WithFields` (#335)
-
-# 0.9.0
-
-* logrus/text_formatter: don't emit empty msg
-* logrus/hooks/airbrake: move out of main repository
-* logrus/hooks/sentry: move out of main repository
-* logrus/hooks/papertrail: move out of main repository
-* logrus/hooks/bugsnag: move out of main repository
-* logrus/core: run tests with `-race`
-* logrus/core: detect TTY based on `stderr`
-* logrus/core: support `WithError` on logger
-* logrus/core: Solaris support
-
-# 0.8.7
-
-* logrus/core: fix possible race (#216)
-* logrus/doc: small typo fixes and doc improvements
-
-
-# 0.8.6
-
-* hooks/raven: allow passing an initialized client
-
-# 0.8.5
-
-* logrus/core: revert #208
-
-# 0.8.4
-
-* formatter/text: fix data race (#218)
-
-# 0.8.3
-
-* logrus/core: fix entry log level (#208)
-* logrus/core: improve performance of text formatter by 40%
-* logrus/core: expose `LevelHooks` type
-* logrus/core: add support for DragonflyBSD and NetBSD
-* formatter/text: print structs more verbosely
-
-# 0.8.2
-
-* logrus: fix more Fatal family functions
-
-# 0.8.1
-
-* logrus: fix not exiting on `Fatalf` and `Fatalln`
-
-# 0.8.0
-
-* logrus: defaults to stderr instead of stdout
-* hooks/sentry: add special field for `*http.Request`
-* formatter/text: ignore Windows for colors
-
-# 0.7.3
-
-* formatter/\*: allow configuration of timestamp layout
-
-# 0.7.2
-
-* formatter/text: Add configuration option for time format (#158)

vendor/github.com/sirupsen/logrus/README.md

@@ -1,513 +0,0 @@
-# Logrus <img src="http://i.imgur.com/hTeVwmJ.png" width="40" height="40" alt=":walrus:" class="emoji" title=":walrus:"/> [![Build Status](https://travis-ci.org/sirupsen/logrus.svg?branch=master)](https://travis-ci.org/sirupsen/logrus) [![GoDoc](https://godoc.org/github.com/sirupsen/logrus?status.svg)](https://godoc.org/github.com/sirupsen/logrus)
-
-Logrus is a structured logger for Go (golang), completely API compatible with
-the standard library logger.
-
-**Logrus is in maintenance-mode.** We will not be introducing new features. It's
-simply too hard to do in a way that won't break many people's projects, which is
-the last thing you want from your Logging library (again...).
-
-This does not mean Logrus is dead. Logrus will continue to be maintained for
-security, (backwards compatible) bug fixes, and performance (where we are
-limited by the interface). 
-
-I believe Logrus' biggest contribution is to have played a part in today's
-widespread use of structured logging in Golang. There doesn't seem to be a
-reason to do a major, breaking iteration into Logrus V2, since the fantastic Go
-community has built those independently. Many fantastic alternatives have sprung
-up. Logrus would look like those, had it been re-designed with what we know
-about structured logging in Go today. Check out, for example,
-[Zerolog][zerolog], [Zap][zap], and [Apex][apex].
-
-[zerolog]: https://github.com/rs/zerolog
-[zap]: https://github.com/uber-go/zap
-[apex]: https://github.com/apex/log
-
-**Seeing weird case-sensitive problems?** It's in the past been possible to
-import Logrus as both upper- and lower-case. Due to the Go package environment,
-this caused issues in the community and we needed a standard. Some environments
-experienced problems with the upper-case variant, so the lower-case was decided.
-Everything using `logrus` will need to use the lower-case:
-`github.com/sirupsen/logrus`. Any package that isn't, should be changed.
-
-To fix Glide, see [these
-comments](https://github.com/sirupsen/logrus/issues/553#issuecomment-306591437).
-For an in-depth explanation of the casing issue, see [this
-comment](https://github.com/sirupsen/logrus/issues/570#issuecomment-313933276).
-
-Nicely color-coded in development (when a TTY is attached, otherwise just
-plain text):
-
-![Colored](http://i.imgur.com/PY7qMwd.png)
-
-With `log.SetFormatter(&log.JSONFormatter{})`, for easy parsing by logstash
-or Splunk:
-
-```json
-{"animal":"walrus","level":"info","msg":"A group of walrus emerges from the
-ocean","size":10,"time":"2014-03-10 19:57:38.562264131 -0400 EDT"}
-
-{"level":"warning","msg":"The group's number increased tremendously!",
-"number":122,"omg":true,"time":"2014-03-10 19:57:38.562471297 -0400 EDT"}
-
-{"animal":"walrus","level":"info","msg":"A giant walrus appears!",
-"size":10,"time":"2014-03-10 19:57:38.562500591 -0400 EDT"}
-
-{"animal":"walrus","level":"info","msg":"Tremendously sized cow enters the ocean.",
-"size":9,"time":"2014-03-10 19:57:38.562527896 -0400 EDT"}
-
-{"level":"fatal","msg":"The ice breaks!","number":100,"omg":true,
-"time":"2014-03-10 19:57:38.562543128 -0400 EDT"}
-```
-
-With the default `log.SetFormatter(&log.TextFormatter{})` when a TTY is not
-attached, the output is compatible with the
-[logfmt](http://godoc.org/github.com/kr/logfmt) format:
-
-```text
-time="2015-03-26T01:27:38-04:00" level=debug msg="Started observing beach" animal=walrus number=8
-time="2015-03-26T01:27:38-04:00" level=info msg="A group of walrus emerges from the ocean" animal=walrus size=10
-time="2015-03-26T01:27:38-04:00" level=warning msg="The group's number increased tremendously!" number=122 omg=true
-time="2015-03-26T01:27:38-04:00" level=debug msg="Temperature changes" temperature=-4
-time="2015-03-26T01:27:38-04:00" level=panic msg="It's over 9000!" animal=orca size=9009
-time="2015-03-26T01:27:38-04:00" level=fatal msg="The ice breaks!" err=&{0x2082280c0 map[animal:orca size:9009] 2015-03-26 01:27:38.441574009 -0400 EDT panic It's over 9000!} number=100 omg=true
-```
-To ensure this behaviour even if a TTY is attached, set your formatter as follows:
-
-```go
-	log.SetFormatter(&log.TextFormatter{
-		DisableColors: true,
-		FullTimestamp: true,
-	})
-```
-
-#### Logging Method Name
-
-If you wish to add the calling method as a field, instruct the logger via:
-```go
-log.SetReportCaller(true)
-```
-This adds the caller as 'method' like so:
-
-```json
-{"animal":"penguin","level":"fatal","method":"github.com/sirupsen/arcticcreatures.migrate","msg":"a penguin swims by",
-"time":"2014-03-10 19:57:38.562543129 -0400 EDT"}
-```
-
-```text
-time="2015-03-26T01:27:38-04:00" level=fatal method=github.com/sirupsen/arcticcreatures.migrate msg="a penguin swims by" animal=penguin
-```
-Note that this does add measurable overhead - the cost will depend on the version of Go, but is
-between 20 and 40% in recent tests with 1.6 and 1.7.  You can validate this in your
-environment via benchmarks: 
-```
-go test -bench=.*CallerTracing
-```
-
-
-#### Case-sensitivity
-
-The organization's name was changed to lower-case--and this will not be changed
-back. If you are getting import conflicts due to case sensitivity, please use
-the lower-case import: `github.com/sirupsen/logrus`.
-
-#### Example
-
-The simplest way to use Logrus is simply the package-level exported logger:
-
-```go
-package main
-
-import (
-  log "github.com/sirupsen/logrus"
-)
-
-func main() {
-  log.WithFields(log.Fields{
-    "animal": "walrus",
-  }).Info("A walrus appears")
-}
-```
-
-Note that it's completely api-compatible with the stdlib logger, so you can
-replace your `log` imports everywhere with `log "github.com/sirupsen/logrus"`
-and you'll now have the flexibility of Logrus. You can customize it all you
-want:
-
-```go
-package main
-
-import (
-  "os"
-  log "github.com/sirupsen/logrus"
-)
-
-func init() {
-  // Log as JSON instead of the default ASCII formatter.
-  log.SetFormatter(&log.JSONFormatter{})
-
-  // Output to stdout instead of the default stderr
-  // Can be any io.Writer, see below for File example
-  log.SetOutput(os.Stdout)
-
-  // Only log the warning severity or above.
-  log.SetLevel(log.WarnLevel)
-}
-
-func main() {
-  log.WithFields(log.Fields{
-    "animal": "walrus",
-    "size":   10,
-  }).Info("A group of walrus emerges from the ocean")
-
-  log.WithFields(log.Fields{
-    "omg":    true,
-    "number": 122,
-  }).Warn("The group's number increased tremendously!")
-
-  log.WithFields(log.Fields{
-    "omg":    true,
-    "number": 100,
-  }).Fatal("The ice breaks!")
-
-  // A common pattern is to re-use fields between logging statements by re-using
-  // the logrus.Entry returned from WithFields()
-  contextLogger := log.WithFields(log.Fields{
-    "common": "this is a common field",
-    "other": "I also should be logged always",
-  })
-
-  contextLogger.Info("I'll be logged with common and other field")
-  contextLogger.Info("Me too")
-}
-```
-
-For more advanced usage such as logging to multiple locations from the same
-application, you can also create an instance of the `logrus` Logger:
-
-```go
-package main
-
-import (
-  "os"
-  "github.com/sirupsen/logrus"
-)
-
-// Create a new instance of the logger. You can have any number of instances.
-var log = logrus.New()
-
-func main() {
-  // The API for setting attributes is a little different than the package level
-  // exported logger. See Godoc.
-  log.Out = os.Stdout
-
-  // You could set this to any `io.Writer` such as a file
-  // file, err := os.OpenFile("logrus.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
-  // if err == nil {
-  //  log.Out = file
-  // } else {
-  //  log.Info("Failed to log to file, using default stderr")
-  // }
-
-  log.WithFields(logrus.Fields{
-    "animal": "walrus",
-    "size":   10,
-  }).Info("A group of walrus emerges from the ocean")
-}
-```
-
-#### Fields
-
-Logrus encourages careful, structured logging through logging fields instead of
-long, unparseable error messages. For example, instead of: `log.Fatalf("Failed
-to send event %s to topic %s with key %d")`, you should log the much more
-discoverable:
-
-```go
-log.WithFields(log.Fields{
-  "event": event,
-  "topic": topic,
-  "key": key,
-}).Fatal("Failed to send event")
-```
-
-We've found this API forces you to think about logging in a way that produces
-much more useful logging messages. We've been in countless situations where just
-a single added field to a log statement that was already there would've saved us
-hours. The `WithFields` call is optional.
-
-In general, with Logrus using any of the `printf`-family functions should be
-seen as a hint you should add a field, however, you can still use the
-`printf`-family functions with Logrus.
-
-#### Default Fields
-
-Often it's helpful to have fields _always_ attached to log statements in an
-application or parts of one. For example, you may want to always log the
-`request_id` and `user_ip` in the context of a request. Instead of writing
-`log.WithFields(log.Fields{"request_id": request_id, "user_ip": user_ip})` on
-every line, you can create a `logrus.Entry` to pass around instead:
-
-```go
-requestLogger := log.WithFields(log.Fields{"request_id": request_id, "user_ip": user_ip})
-requestLogger.Info("something happened on that request") # will log request_id and user_ip
-requestLogger.Warn("something not great happened")
-```
-
-#### Hooks
-
-You can add hooks for logging levels. For example to send errors to an exception
-tracking service on `Error`, `Fatal` and `Panic`, info to StatsD or log to
-multiple places simultaneously, e.g. syslog.
-
-Logrus comes with [built-in hooks](hooks/). Add those, or your custom hook, in
-`init`:
-
-```go
-import (
-  log "github.com/sirupsen/logrus"
-  "gopkg.in/gemnasium/logrus-airbrake-hook.v2" // the package is named "airbrake"
-  logrus_syslog "github.com/sirupsen/logrus/hooks/syslog"
-  "log/syslog"
-)
-
-func init() {
-
-  // Use the Airbrake hook to report errors that have Error severity or above to
-  // an exception tracker. You can create custom hooks, see the Hooks section.
-  log.AddHook(airbrake.NewHook(123, "xyz", "production"))
-
-  hook, err := logrus_syslog.NewSyslogHook("udp", "localhost:514", syslog.LOG_INFO, "")
-  if err != nil {
-    log.Error("Unable to connect to local syslog daemon")
-  } else {
-    log.AddHook(hook)
-  }
-}
-```
-Note: Syslog hook also support connecting to local syslog (Ex. "/dev/log" or "/var/run/syslog" or "/var/run/log"). For the detail, please check the [syslog hook README](hooks/syslog/README.md).
-
-A list of currently known service hooks can be found in this wiki [page](https://github.com/sirupsen/logrus/wiki/Hooks)
-
-
-#### Level logging
-
-Logrus has seven logging levels: Trace, Debug, Info, Warning, Error, Fatal and Panic.
-
-```go
-log.Trace("Something very low level.")
-log.Debug("Useful debugging information.")
-log.Info("Something noteworthy happened!")
-log.Warn("You should probably take a look at this.")
-log.Error("Something failed but I'm not quitting.")
-// Calls os.Exit(1) after logging
-log.Fatal("Bye.")
-// Calls panic() after logging
-log.Panic("I'm bailing.")
-```
-
-You can set the logging level on a `Logger`, then it will only log entries with
-that severity or anything above it:
-
-```go
-// Will log anything that is info or above (warn, error, fatal, panic). Default.
-log.SetLevel(log.InfoLevel)
-```
-
-It may be useful to set `log.Level = logrus.DebugLevel` in a debug or verbose
-environment if your application has that.
-
-#### Entries
-
-Besides the fields added with `WithField` or `WithFields` some fields are
-automatically added to all logging events:
-
-1. `time`. The timestamp when the entry was created.
-2. `msg`. The logging message passed to `{Info,Warn,Error,Fatal,Panic}` after
-   the `AddFields` call. E.g. `Failed to send event.`
-3. `level`. The logging level. E.g. `info`.
-
-#### Environments
-
-Logrus has no notion of environment.
-
-If you wish for hooks and formatters to only be used in specific environments,
-you should handle that yourself. For example, if your application has a global
-variable `Environment`, which is a string representation of the environment you
-could do:
-
-```go
-import (
-  log "github.com/sirupsen/logrus"
-)
-
-init() {
-  // do something here to set environment depending on an environment variable
-  // or command-line flag
-  if Environment == "production" {
-    log.SetFormatter(&log.JSONFormatter{})
-  } else {
-    // The TextFormatter is default, you don't actually have to do this.
-    log.SetFormatter(&log.TextFormatter{})
-  }
-}
-```
-
-This configuration is how `logrus` was intended to be used, but JSON in
-production is mostly only useful if you do log aggregation with tools like
-Splunk or Logstash.
-
-#### Formatters
-
-The built-in logging formatters are:
-
-* `logrus.TextFormatter`. Logs the event in colors if stdout is a tty, otherwise
-  without colors.
-  * *Note:* to force colored output when there is no TTY, set the `ForceColors`
-    field to `true`.  To force no colored output even if there is a TTY  set the
-    `DisableColors` field to `true`. For Windows, see
-    [github.com/mattn/go-colorable](https://github.com/mattn/go-colorable).
-  * When colors are enabled, levels are truncated to 4 characters by default. To disable
-    truncation set the `DisableLevelTruncation` field to `true`.
-  * When outputting to a TTY, it's often helpful to visually scan down a column where all the levels are the same width. Setting the `PadLevelText` field to `true` enables this behavior, by adding padding to the level text.
-  * All options are listed in the [generated docs](https://godoc.org/github.com/sirupsen/logrus#TextFormatter).
-* `logrus.JSONFormatter`. Logs fields as JSON.
-  * All options are listed in the [generated docs](https://godoc.org/github.com/sirupsen/logrus#JSONFormatter).
-
-Third party logging formatters:
-
-* [`FluentdFormatter`](https://github.com/joonix/log). Formats entries that can be parsed by Kubernetes and Google Container Engine.
-* [`GELF`](https://github.com/fabienm/go-logrus-formatters). Formats entries so they comply to Graylog's [GELF 1.1 specification](http://docs.graylog.org/en/2.4/pages/gelf.html).
-* [`logstash`](https://github.com/bshuster-repo/logrus-logstash-hook). Logs fields as [Logstash](http://logstash.net) Events.
-* [`prefixed`](https://github.com/x-cray/logrus-prefixed-formatter). Displays log entry source along with alternative layout.
-* [`zalgo`](https://github.com/aybabtme/logzalgo). Invoking the Power of Zalgo.
-* [`nested-logrus-formatter`](https://github.com/antonfisher/nested-logrus-formatter). Converts logrus fields to a nested structure.
-* [`powerful-logrus-formatter`](https://github.com/zput/zxcTool). get fileName, log's line number and the latest function's name when print log; Sava log to files.
-* [`caption-json-formatter`](https://github.com/nolleh/caption_json_formatter). logrus's message json formatter with human-readable caption added.
-
-You can define your formatter by implementing the `Formatter` interface,
-requiring a `Format` method. `Format` takes an `*Entry`. `entry.Data` is a
-`Fields` type (`map[string]interface{}`) with all your fields as well as the
-default ones (see Entries section above):
-
-```go
-type MyJSONFormatter struct {
-}
-
-log.SetFormatter(new(MyJSONFormatter))
-
-func (f *MyJSONFormatter) Format(entry *Entry) ([]byte, error) {
-  // Note this doesn't include Time, Level and Message which are available on
-  // the Entry. Consult `godoc` on information about those fields or read the
-  // source of the official loggers.
-  serialized, err := json.Marshal(entry.Data)
-    if err != nil {
-      return nil, fmt.Errorf("Failed to marshal fields to JSON, %w", err)
-    }
-  return append(serialized, '\n'), nil
-}
-```
-
-#### Logger as an `io.Writer`
-
-Logrus can be transformed into an `io.Writer`. That writer is the end of an `io.Pipe` and it is your responsibility to close it.
-
-```go
-w := logger.Writer()
-defer w.Close()
-
-srv := http.Server{
-    // create a stdlib log.Logger that writes to
-    // logrus.Logger.
-    ErrorLog: log.New(w, "", 0),
-}
-```
-
-Each line written to that writer will be printed the usual way, using formatters
-and hooks. The level for those entries is `info`.
-
-This means that we can override the standard library logger easily:
-
-```go
-logger := logrus.New()
-logger.Formatter = &logrus.JSONFormatter{}
-
-// Use logrus for standard log output
-// Note that `log` here references stdlib's log
-// Not logrus imported under the name `log`.
-log.SetOutput(logger.Writer())
-```
-
-#### Rotation
-
-Log rotation is not provided with Logrus. Log rotation should be done by an
-external program (like `logrotate(8)`) that can compress and delete old log
-entries. It should not be a feature of the application-level logger.
-
-#### Tools
-
-| Tool | Description |
-| ---- | ----------- |
-|[Logrus Mate](https://github.com/gogap/logrus_mate)|Logrus mate is a tool for Logrus to manage loggers, you can initial logger's level, hook and formatter by config file, the logger will be generated with different configs in different environments.|
-|[Logrus Viper Helper](https://github.com/heirko/go-contrib/tree/master/logrusHelper)|An Helper around Logrus to wrap with spf13/Viper to load configuration with fangs! And to simplify Logrus configuration use some behavior of [Logrus Mate](https://github.com/gogap/logrus_mate). [sample](https://github.com/heirko/iris-contrib/blob/master/middleware/logrus-logger/example) |
-
-#### Testing
-
-Logrus has a built in facility for asserting the presence of log messages. This is implemented through the `test` hook and provides:
-
-* decorators for existing logger (`test.NewLocal` and `test.NewGlobal`) which basically just adds the `test` hook
-* a test logger (`test.NewNullLogger`) that just records log messages (and does not output any):
-
-```go
-import(
-  "github.com/sirupsen/logrus"
-  "github.com/sirupsen/logrus/hooks/test"
-  "github.com/stretchr/testify/assert"
-  "testing"
-)
-
-func TestSomething(t*testing.T){
-  logger, hook := test.NewNullLogger()
-  logger.Error("Helloerror")
-
-  assert.Equal(t, 1, len(hook.Entries))
-  assert.Equal(t, logrus.ErrorLevel, hook.LastEntry().Level)
-  assert.Equal(t, "Helloerror", hook.LastEntry().Message)
-
-  hook.Reset()
-  assert.Nil(t, hook.LastEntry())
-}
-```
-
-#### Fatal handlers
-
-Logrus can register one or more functions that will be called when any `fatal`
-level message is logged. The registered handlers will be executed before
-logrus performs an `os.Exit(1)`. This behavior may be helpful if callers need
-to gracefully shutdown. Unlike a `panic("Something went wrong...")` call which can be intercepted with a deferred `recover` a call to `os.Exit(1)` can not be intercepted.
-
-```
-...
-handler := func() {
-  // gracefully shutdown something...
-}
-logrus.RegisterExitHandler(handler)
-...
-```
-
-#### Thread safety
-
-By default, Logger is protected by a mutex for concurrent writes. The mutex is held when calling hooks and writing logs.
-If you are sure such locking is not needed, you can call logger.SetNoLock() to disable the locking.
-
-Situation when locking is not needed includes:
-
-* You have no hooks registered, or hooks calling is already thread-safe.
-
-* Writing to logger.Out is already thread-safe, for example:
-
-  1) logger.Out is protected by locks.
-
-  2) logger.Out is an os.File handler opened with `O_APPEND` flag, and every write is smaller than 4k. (This allows multi-thread/multi-process writing)
-
-     (Refer to http://www.notthewizard.com/2014/06/17/are-files-appends-really-atomic/)

vendor/github.com/sirupsen/logrus/alt_exit.go

@@ -1,76 +0,0 @@
-package logrus
-
-// The following code was sourced and modified from the
-// https://github.com/tebeka/atexit package governed by the following license:
-//
-// Copyright (c) 2012 Miki Tebeka <miki.tebeka@gmail.com>.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy of
-// this software and associated documentation files (the "Software"), to deal in
-// the Software without restriction, including without limitation the rights to
-// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-// the Software, and to permit persons to whom the Software is furnished to do so,
-// subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-import (
-	"fmt"
-	"os"
-)
-
-var handlers = []func(){}
-
-func runHandler(handler func()) {
-	defer func() {
-		if err := recover(); err != nil {
-			fmt.Fprintln(os.Stderr, "Error: Logrus exit handler error:", err)
-		}
-	}()
-
-	handler()
-}
-
-func runHandlers() {
-	for _, handler := range handlers {
-		runHandler(handler)
-	}
-}
-
-// Exit runs all the Logrus atexit handlers and then terminates the program using os.Exit(code)
-func Exit(code int) {
-	runHandlers()
-	os.Exit(code)
-}
-
-// RegisterExitHandler appends a Logrus Exit handler to the list of handlers,
-// call logrus.Exit to invoke all handlers. The handlers will also be invoked when
-// any Fatal log entry is made.
-//
-// This method is useful when a caller wishes to use logrus to log a fatal
-// message but also needs to gracefully shutdown. An example usecase could be
-// closing database connections, or sending a alert that the application is
-// closing.
-func RegisterExitHandler(handler func()) {
-	handlers = append(handlers, handler)
-}
-
-// DeferExitHandler prepends a Logrus Exit handler to the list of handlers,
-// call logrus.Exit to invoke all handlers. The handlers will also be invoked when
-// any Fatal log entry is made.
-//
-// This method is useful when a caller wishes to use logrus to log a fatal
-// message but also needs to gracefully shutdown. An example usecase could be
-// closing database connections, or sending a alert that the application is
-// closing.
-func DeferExitHandler(handler func()) {
-	handlers = append([]func(){handler}, handlers...)
-}

vendor/github.com/sirupsen/logrus/appveyor.yml

@@ -1,14 +0,0 @@
-version: "{build}"
-platform: x64
-clone_folder: c:\gopath\src\github.com\sirupsen\logrus
-environment:
-  GOPATH: c:\gopath
-branches:
-  only:
-    - master
-install:
-  - set PATH=%GOPATH%\bin;c:\go\bin;%PATH%
-  - go version
-build_script:
-  - go get -t
-  - go test

vendor/github.com/sirupsen/logrus/buffer_pool.go

@@ -1,52 +0,0 @@
-package logrus
-
-import (
-	"bytes"
-	"sync"
-)
-
-var (
-	bufferPool BufferPool
-)
-
-type BufferPool interface {
-	Put(*bytes.Buffer)
-	Get() *bytes.Buffer
-}
-
-type defaultPool struct {
-	pool *sync.Pool
-}
-
-func (p *defaultPool) Put(buf *bytes.Buffer) {
-	p.pool.Put(buf)
-}
-
-func (p *defaultPool) Get() *bytes.Buffer {
-	return p.pool.Get().(*bytes.Buffer)
-}
-
-func getBuffer() *bytes.Buffer {
-	return bufferPool.Get()
-}
-
-func putBuffer(buf *bytes.Buffer) {
-	buf.Reset()
-	bufferPool.Put(buf)
-}
-
-// SetBufferPool allows to replace the default logrus buffer pool
-// to better meets the specific needs of an application.
-func SetBufferPool(bp BufferPool) {
-	bufferPool = bp
-}
-
-func init() {
-	SetBufferPool(&defaultPool{
-		pool: &sync.Pool{
-			New: func() interface{} {
-				return new(bytes.Buffer)
-			},
-		},
-	})
-}

vendor/github.com/sirupsen/logrus/doc.go

@@ -1,26 +0,0 @@
-/*
-Package logrus is a structured logger for Go, completely API compatible with the standard library logger.
-
-
-The simplest way to use Logrus is simply the package-level exported logger:
-
-  package main
-
-  import (
-    log "github.com/sirupsen/logrus"
-  )
-
-  func main() {
-    log.WithFields(log.Fields{
-      "animal": "walrus",
-      "number": 1,
-      "size":   10,
-    }).Info("A walrus appears")
-  }
-
-Output:
-  time="2015-09-07T08:48:33Z" level=info msg="A walrus appears" animal=walrus number=1 size=10
-
-For a full guide visit https://github.com/sirupsen/logrus
-*/
-package logrus

vendor/github.com/sirupsen/logrus/entry.go

@@ -1,431 +0,0 @@
-package logrus
-
-import (
-	"bytes"
-	"context"
-	"fmt"
-	"os"
-	"reflect"
-	"runtime"
-	"strings"
-	"sync"
-	"time"
-)
-
-var (
-
-	// qualified package name, cached at first use
-	logrusPackage string
-
-	// Positions in the call stack when tracing to report the calling method
-	minimumCallerDepth int
-
-	// Used for caller information initialisation
-	callerInitOnce sync.Once
-)
-
-const (
-	maximumCallerDepth int = 25
-	knownLogrusFrames  int = 4
-)
-
-func init() {
-	// start at the bottom of the stack before the package-name cache is primed
-	minimumCallerDepth = 1
-}
-
-// Defines the key when adding errors using WithError.
-var ErrorKey = "error"
-
-// An entry is the final or intermediate Logrus logging entry. It contains all
-// the fields passed with WithField{,s}. It's finally logged when Trace, Debug,
-// Info, Warn, Error, Fatal or Panic is called on it. These objects can be
-// reused and passed around as much as you wish to avoid field duplication.
-type Entry struct {
-	Logger *Logger
-
-	// Contains all the fields set by the user.
-	Data Fields
-
-	// Time at which the log entry was created
-	Time time.Time
-
-	// Level the log entry was logged at: Trace, Debug, Info, Warn, Error, Fatal or Panic
-	// This field will be set on entry firing and the value will be equal to the one in Logger struct field.
-	Level Level
-
-	// Calling method, with package name
-	Caller *runtime.Frame
-
-	// Message passed to Trace, Debug, Info, Warn, Error, Fatal or Panic
-	Message string
-
-	// When formatter is called in entry.log(), a Buffer may be set to entry
-	Buffer *bytes.Buffer
-
-	// Contains the context set by the user. Useful for hook processing etc.
-	Context context.Context
-
-	// err may contain a field formatting error
-	err string
-}
-
-func NewEntry(logger *Logger) *Entry {
-	return &Entry{
-		Logger: logger,
-		// Default is three fields, plus one optional.  Give a little extra room.
-		Data: make(Fields, 6),
-	}
-}
-
-func (entry *Entry) Dup() *Entry {
-	data := make(Fields, len(entry.Data))
-	for k, v := range entry.Data {
-		data[k] = v
-	}
-	return &Entry{Logger: entry.Logger, Data: data, Time: entry.Time, Context: entry.Context, err: entry.err}
-}
-
-// Returns the bytes representation of this entry from the formatter.
-func (entry *Entry) Bytes() ([]byte, error) {
-	return entry.Logger.Formatter.Format(entry)
-}
-
-// Returns the string representation from the reader and ultimately the
-// formatter.
-func (entry *Entry) String() (string, error) {
-	serialized, err := entry.Bytes()
-	if err != nil {
-		return "", err
-	}
-	str := string(serialized)
-	return str, nil
-}
-
-// Add an error as single field (using the key defined in ErrorKey) to the Entry.
-func (entry *Entry) WithError(err error) *Entry {
-	return entry.WithField(ErrorKey, err)
-}
-
-// Add a context to the Entry.
-func (entry *Entry) WithContext(ctx context.Context) *Entry {
-	dataCopy := make(Fields, len(entry.Data))
-	for k, v := range entry.Data {
-		dataCopy[k] = v
-	}
-	return &Entry{Logger: entry.Logger, Data: dataCopy, Time: entry.Time, err: entry.err, Context: ctx}
-}
-
-// Add a single field to the Entry.
-func (entry *Entry) WithField(key string, value interface{}) *Entry {
-	return entry.WithFields(Fields{key: value})
-}
-
-// Add a map of fields to the Entry.
-func (entry *Entry) WithFields(fields Fields) *Entry {
-	data := make(Fields, len(entry.Data)+len(fields))
-	for k, v := range entry.Data {
-		data[k] = v
-	}
-	fieldErr := entry.err
-	for k, v := range fields {
-		isErrField := false
-		if t := reflect.TypeOf(v); t != nil {
-			switch {
-			case t.Kind() == reflect.Func, t.Kind() == reflect.Ptr && t.Elem().Kind() == reflect.Func:
-				isErrField = true
-			}
-		}
-		if isErrField {
-			tmp := fmt.Sprintf("can not add field %q", k)
-			if fieldErr != "" {
-				fieldErr = entry.err + ", " + tmp
-			} else {
-				fieldErr = tmp
-			}
-		} else {
-			data[k] = v
-		}
-	}
-	return &Entry{Logger: entry.Logger, Data: data, Time: entry.Time, err: fieldErr, Context: entry.Context}
-}
-
-// Overrides the time of the Entry.
-func (entry *Entry) WithTime(t time.Time) *Entry {
-	dataCopy := make(Fields, len(entry.Data))
-	for k, v := range entry.Data {
-		dataCopy[k] = v
-	}
-	return &Entry{Logger: entry.Logger, Data: dataCopy, Time: t, err: entry.err, Context: entry.Context}
-}
-
-// getPackageName reduces a fully qualified function name to the package name
-// There really ought to be to be a better way...
-func getPackageName(f string) string {
-	for {
-		lastPeriod := strings.LastIndex(f, ".")
-		lastSlash := strings.LastIndex(f, "/")
-		if lastPeriod > lastSlash {
-			f = f[:lastPeriod]
-		} else {
-			break
-		}
-	}
-
-	return f
-}
-
-// getCaller retrieves the name of the first non-logrus calling function
-func getCaller() *runtime.Frame {
-	// cache this package's fully-qualified name
-	callerInitOnce.Do(func() {
-		pcs := make([]uintptr, maximumCallerDepth)
-		_ = runtime.Callers(0, pcs)
-
-		// dynamic get the package name and the minimum caller depth
-		for i := 0; i < maximumCallerDepth; i++ {
-			funcName := runtime.FuncForPC(pcs[i]).Name()
-			if strings.Contains(funcName, "getCaller") {
-				logrusPackage = getPackageName(funcName)
-				break
-			}
-		}
-
-		minimumCallerDepth = knownLogrusFrames
-	})
-
-	// Restrict the lookback frames to avoid runaway lookups
-	pcs := make([]uintptr, maximumCallerDepth)
-	depth := runtime.Callers(minimumCallerDepth, pcs)
-	frames := runtime.CallersFrames(pcs[:depth])
-
-	for f, again := frames.Next(); again; f, again = frames.Next() {
-		pkg := getPackageName(f.Function)
-
-		// If the caller isn't part of this package, we're done
-		if pkg != logrusPackage {
-			return &f //nolint:scopelint
-		}
-	}
-
-	// if we got here, we failed to find the caller's context
-	return nil
-}
-
-func (entry Entry) HasCaller() (has bool) {
-	return entry.Logger != nil &&
-		entry.Logger.ReportCaller &&
-		entry.Caller != nil
-}
-
-func (entry *Entry) log(level Level, msg string) {
-	var buffer *bytes.Buffer
-
-	newEntry := entry.Dup()
-
-	if newEntry.Time.IsZero() {
-		newEntry.Time = time.Now()
-	}
-
-	newEntry.Level = level
-	newEntry.Message = msg
-
-	newEntry.Logger.mu.Lock()
-	reportCaller := newEntry.Logger.ReportCaller
-	newEntry.Logger.mu.Unlock()
-
-	if reportCaller {
-		newEntry.Caller = getCaller()
-	}
-
-	newEntry.fireHooks()
-
-	buffer = getBuffer()
-	defer func() {
-		newEntry.Buffer = nil
-		putBuffer(buffer)
-	}()
-	buffer.Reset()
-	newEntry.Buffer = buffer
-
-	newEntry.write()
-
-	newEntry.Buffer = nil
-
-	// To avoid Entry#log() returning a value that only would make sense for
-	// panic() to use in Entry#Panic(), we avoid the allocation by checking
-	// directly here.
-	if level <= PanicLevel {
-		panic(newEntry)
-	}
-}
-
-func (entry *Entry) fireHooks() {
-	var tmpHooks LevelHooks
-	entry.Logger.mu.Lock()
-	tmpHooks = make(LevelHooks, len(entry.Logger.Hooks))
-	for k, v := range entry.Logger.Hooks {
-		tmpHooks[k] = v
-	}
-	entry.Logger.mu.Unlock()
-
-	err := tmpHooks.Fire(entry.Level, entry)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "Failed to fire hook: %v\n", err)
-	}
-}
-
-func (entry *Entry) write() {
-	serialized, err := entry.Logger.Formatter.Format(entry)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "Failed to obtain reader, %v\n", err)
-		return
-	}
-	entry.Logger.mu.Lock()
-	defer entry.Logger.mu.Unlock()
-	if _, err := entry.Logger.Out.Write(serialized); err != nil {
-		fmt.Fprintf(os.Stderr, "Failed to write to log, %v\n", err)
-	}
-}
-
-func (entry *Entry) Log(level Level, args ...interface{}) {
-	if entry.Logger.IsLevelEnabled(level) {
-		entry.log(level, fmt.Sprint(args...))
-	}
-}
-
-func (entry *Entry) Trace(args ...interface{}) {
-	entry.Log(TraceLevel, args...)
-}
-
-func (entry *Entry) Debug(args ...interface{}) {
-	entry.Log(DebugLevel, args...)
-}
-
-func (entry *Entry) Print(args ...interface{}) {
-	entry.Info(args...)
-}
-
-func (entry *Entry) Info(args ...interface{}) {
-	entry.Log(InfoLevel, args...)
-}
-
-func (entry *Entry) Warn(args ...interface{}) {
-	entry.Log(WarnLevel, args...)
-}
-
-func (entry *Entry) Warning(args ...interface{}) {
-	entry.Warn(args...)
-}
-
-func (entry *Entry) Error(args ...interface{}) {
-	entry.Log(ErrorLevel, args...)
-}
-
-func (entry *Entry) Fatal(args ...interface{}) {
-	entry.Log(FatalLevel, args...)
-	entry.Logger.Exit(1)
-}
-
-func (entry *Entry) Panic(args ...interface{}) {
-	entry.Log(PanicLevel, args...)
-}
-
-// Entry Printf family functions
-
-func (entry *Entry) Logf(level Level, format string, args ...interface{}) {
-	if entry.Logger.IsLevelEnabled(level) {
-		entry.Log(level, fmt.Sprintf(format, args...))
-	}
-}
-
-func (entry *Entry) Tracef(format string, args ...interface{}) {
-	entry.Logf(TraceLevel, format, args...)
-}
-
-func (entry *Entry) Debugf(format string, args ...interface{}) {
-	entry.Logf(DebugLevel, format, args...)
-}
-
-func (entry *Entry) Infof(format string, args ...interface{}) {
-	entry.Logf(InfoLevel, format, args...)
-}
-
-func (entry *Entry) Printf(format string, args ...interface{}) {
-	entry.Infof(format, args...)
-}
-
-func (entry *Entry) Warnf(format string, args ...interface{}) {
-	entry.Logf(WarnLevel, format, args...)
-}
-
-func (entry *Entry) Warningf(format string, args ...interface{}) {
-	entry.Warnf(format, args...)
-}
-
-func (entry *Entry) Errorf(format string, args ...interface{}) {
-	entry.Logf(ErrorLevel, format, args...)
-}
-
-func (entry *Entry) Fatalf(format string, args ...interface{}) {
-	entry.Logf(FatalLevel, format, args...)
-	entry.Logger.Exit(1)
-}
-
-func (entry *Entry) Panicf(format string, args ...interface{}) {
-	entry.Logf(PanicLevel, format, args...)
-}
-
-// Entry Println family functions
-
-func (entry *Entry) Logln(level Level, args ...interface{}) {
-	if entry.Logger.IsLevelEnabled(level) {
-		entry.Log(level, entry.sprintlnn(args...))
-	}
-}
-
-func (entry *Entry) Traceln(args ...interface{}) {
-	entry.Logln(TraceLevel, args...)
-}
-
-func (entry *Entry) Debugln(args ...interface{}) {
-	entry.Logln(DebugLevel, args...)
-}
-
-func (entry *Entry) Infoln(args ...interface{}) {
-	entry.Logln(InfoLevel, args...)
-}
-
-func (entry *Entry) Println(args ...interface{}) {
-	entry.Infoln(args...)
-}
-
-func (entry *Entry) Warnln(args ...interface{}) {
-	entry.Logln(WarnLevel, args...)
-}
-
-func (entry *Entry) Warningln(args ...interface{}) {
-	entry.Warnln(args...)
-}
-
-func (entry *Entry) Errorln(args ...interface{}) {
-	entry.Logln(ErrorLevel, args...)
-}
-
-func (entry *Entry) Fatalln(args ...interface{}) {
-	entry.Logln(FatalLevel, args...)
-	entry.Logger.Exit(1)
-}
-
-func (entry *Entry) Panicln(args ...interface{}) {
-	entry.Logln(PanicLevel, args...)
-}
-
-// Sprintlnn => Sprint no newline. This is to get the behavior of how
-// fmt.Sprintln where spaces are always added between operands, regardless of
-// their type. Instead of vendoring the Sprintln implementation to spare a
-// string allocation, we do the simplest thing.
-func (entry *Entry) sprintlnn(args ...interface{}) string {
-	msg := fmt.Sprintln(args...)
-	return msg[:len(msg)-1]
-}

vendor/github.com/sirupsen/logrus/exported.go

@@ -1,270 +0,0 @@
-package logrus
-
-import (
-	"context"
-	"io"
-	"time"
-)
-
-var (
-	// std is the name of the standard logger in stdlib `log`
-	std = New()
-)
-
-func StandardLogger() *Logger {
-	return std
-}
-
-// SetOutput sets the standard logger output.
-func SetOutput(out io.Writer) {
-	std.SetOutput(out)
-}
-
-// SetFormatter sets the standard logger formatter.
-func SetFormatter(formatter Formatter) {
-	std.SetFormatter(formatter)
-}
-
-// SetReportCaller sets whether the standard logger will include the calling
-// method as a field.
-func SetReportCaller(include bool) {
-	std.SetReportCaller(include)
-}
-
-// SetLevel sets the standard logger level.
-func SetLevel(level Level) {
-	std.SetLevel(level)
-}
-
-// GetLevel returns the standard logger level.
-func GetLevel() Level {
-	return std.GetLevel()
-}
-
-// IsLevelEnabled checks if the log level of the standard logger is greater than the level param
-func IsLevelEnabled(level Level) bool {
-	return std.IsLevelEnabled(level)
-}
-
-// AddHook adds a hook to the standard logger hooks.
-func AddHook(hook Hook) {
-	std.AddHook(hook)
-}
-
-// WithError creates an entry from the standard logger and adds an error to it, using the value defined in ErrorKey as key.
-func WithError(err error) *Entry {
-	return std.WithField(ErrorKey, err)
-}
-
-// WithContext creates an entry from the standard logger and adds a context to it.
-func WithContext(ctx context.Context) *Entry {
-	return std.WithContext(ctx)
-}
-
-// WithField creates an entry from the standard logger and adds a field to
-// it. If you want multiple fields, use `WithFields`.
-//
-// Note that it doesn't log until you call Debug, Print, Info, Warn, Fatal
-// or Panic on the Entry it returns.
-func WithField(key string, value interface{}) *Entry {
-	return std.WithField(key, value)
-}
-
-// WithFields creates an entry from the standard logger and adds multiple
-// fields to it. This is simply a helper for `WithField`, invoking it
-// once for each field.
-//
-// Note that it doesn't log until you call Debug, Print, Info, Warn, Fatal
-// or Panic on the Entry it returns.
-func WithFields(fields Fields) *Entry {
-	return std.WithFields(fields)
-}
-
-// WithTime creates an entry from the standard logger and overrides the time of
-// logs generated with it.
-//
-// Note that it doesn't log until you call Debug, Print, Info, Warn, Fatal
-// or Panic on the Entry it returns.
-func WithTime(t time.Time) *Entry {
-	return std.WithTime(t)
-}
-
-// Trace logs a message at level Trace on the standard logger.
-func Trace(args ...interface{}) {
-	std.Trace(args...)
-}
-
-// Debug logs a message at level Debug on the standard logger.
-func Debug(args ...interface{}) {
-	std.Debug(args...)
-}
-
-// Print logs a message at level Info on the standard logger.
-func Print(args ...interface{}) {
-	std.Print(args...)
-}
-
-// Info logs a message at level Info on the standard logger.
-func Info(args ...interface{}) {
-	std.Info(args...)
-}
-
-// Warn logs a message at level Warn on the standard logger.
-func Warn(args ...interface{}) {
-	std.Warn(args...)
-}
-
-// Warning logs a message at level Warn on the standard logger.
-func Warning(args ...interface{}) {
-	std.Warning(args...)
-}
-
-// Error logs a message at level Error on the standard logger.
-func Error(args ...interface{}) {
-	std.Error(args...)
-}
-
-// Panic logs a message at level Panic on the standard logger.
-func Panic(args ...interface{}) {
-	std.Panic(args...)
-}
-
-// Fatal logs a message at level Fatal on the standard logger then the process will exit with status set to 1.
-func Fatal(args ...interface{}) {
-	std.Fatal(args...)
-}
-
-// TraceFn logs a message from a func at level Trace on the standard logger.
-func TraceFn(fn LogFunction) {
-	std.TraceFn(fn)
-}
-
-// DebugFn logs a message from a func at level Debug on the standard logger.
-func DebugFn(fn LogFunction) {
-	std.DebugFn(fn)
-}
-
-// PrintFn logs a message from a func at level Info on the standard logger.
-func PrintFn(fn LogFunction) {
-	std.PrintFn(fn)
-}
-
-// InfoFn logs a message from a func at level Info on the standard logger.
-func InfoFn(fn LogFunction) {
-	std.InfoFn(fn)
-}
-
-// WarnFn logs a message from a func at level Warn on the standard logger.
-func WarnFn(fn LogFunction) {
-	std.WarnFn(fn)
-}
-
-// WarningFn logs a message from a func at level Warn on the standard logger.
-func WarningFn(fn LogFunction) {
-	std.WarningFn(fn)
-}
-
-// ErrorFn logs a message from a func at level Error on the standard logger.
-func ErrorFn(fn LogFunction) {
-	std.ErrorFn(fn)
-}
-
-// PanicFn logs a message from a func at level Panic on the standard logger.
-func PanicFn(fn LogFunction) {
-	std.PanicFn(fn)
-}
-
-// FatalFn logs a message from a func at level Fatal on the standard logger then the process will exit with status set to 1.
-func FatalFn(fn LogFunction) {
-	std.FatalFn(fn)
-}
-
-// Tracef logs a message at level Trace on the standard logger.
-func Tracef(format string, args ...interface{}) {
-	std.Tracef(format, args...)
-}
-
-// Debugf logs a message at level Debug on the standard logger.
-func Debugf(format string, args ...interface{}) {
-	std.Debugf(format, args...)
-}
-
-// Printf logs a message at level Info on the standard logger.
-func Printf(format string, args ...interface{}) {
-	std.Printf(format, args...)
-}
-
-// Infof logs a message at level Info on the standard logger.
-func Infof(format string, args ...interface{}) {
-	std.Infof(format, args...)
-}
-
-// Warnf logs a message at level Warn on the standard logger.
-func Warnf(format string, args ...interface{}) {
-	std.Warnf(format, args...)
-}
-
-// Warningf logs a message at level Warn on the standard logger.
-func Warningf(format string, args ...interface{}) {
-	std.Warningf(format, args...)
-}
-
-// Errorf logs a message at level Error on the standard logger.
-func Errorf(format string, args ...interface{}) {
-	std.Errorf(format, args...)
-}
-
-// Panicf logs a message at level Panic on the standard logger.
-func Panicf(format string, args ...interface{}) {
-	std.Panicf(format, args...)
-}
-
-// Fatalf logs a message at level Fatal on the standard logger then the process will exit with status set to 1.
-func Fatalf(format string, args ...interface{}) {
-	std.Fatalf(format, args...)
-}
-
-// Traceln logs a message at level Trace on the standard logger.
-func Traceln(args ...interface{}) {
-	std.Traceln(args...)
-}
-
-// Debugln logs a message at level Debug on the standard logger.
-func Debugln(args ...interface{}) {
-	std.Debugln(args...)
-}
-
-// Println logs a message at level Info on the standard logger.
-func Println(args ...interface{}) {
-	std.Println(args...)
-}
-
-// Infoln logs a message at level Info on the standard logger.
-func Infoln(args ...interface{}) {
-	std.Infoln(args...)
-}
-
-// Warnln logs a message at level Warn on the standard logger.
-func Warnln(args ...interface{}) {
-	std.Warnln(args...)
-}
-
-// Warningln logs a message at level Warn on the standard logger.
-func Warningln(args ...interface{}) {
-	std.Warningln(args...)
-}
-
-// Errorln logs a message at level Error on the standard logger.
-func Errorln(args ...interface{}) {
-	std.Errorln(args...)
-}
-
-// Panicln logs a message at level Panic on the standard logger.
-func Panicln(args ...interface{}) {
-	std.Panicln(args...)
-}
-
-// Fatalln logs a message at level Fatal on the standard logger then the process will exit with status set to 1.
-func Fatalln(args ...interface{}) {
-	std.Fatalln(args...)
-}

vendor/github.com/sirupsen/logrus/formatter.go

@@ -1,78 +0,0 @@
-package logrus
-
-import "time"
-
-// Default key names for the default fields
-const (
-	defaultTimestampFormat = time.RFC3339
-	FieldKeyMsg            = "msg"
-	FieldKeyLevel          = "level"
-	FieldKeyTime           = "time"
-	FieldKeyLogrusError    = "logrus_error"
-	FieldKeyFunc           = "func"
-	FieldKeyFile           = "file"
-)
-
-// The Formatter interface is used to implement a custom Formatter. It takes an
-// `Entry`. It exposes all the fields, including the default ones:
-//
-// * `entry.Data["msg"]`. The message passed from Info, Warn, Error ..
-// * `entry.Data["time"]`. The timestamp.
-// * `entry.Data["level"]. The level the entry was logged at.
-//
-// Any additional fields added with `WithField` or `WithFields` are also in
-// `entry.Data`. Format is expected to return an array of bytes which are then
-// logged to `logger.Out`.
-type Formatter interface {
-	Format(*Entry) ([]byte, error)
-}
-
-// This is to not silently overwrite `time`, `msg`, `func` and `level` fields when
-// dumping it. If this code wasn't there doing:
-//
-//  logrus.WithField("level", 1).Info("hello")
-//
-// Would just silently drop the user provided level. Instead with this code
-// it'll logged as:
-//
-//  {"level": "info", "fields.level": 1, "msg": "hello", "time": "..."}
-//
-// It's not exported because it's still using Data in an opinionated way. It's to
-// avoid code duplication between the two default formatters.
-func prefixFieldClashes(data Fields, fieldMap FieldMap, reportCaller bool) {
-	timeKey := fieldMap.resolve(FieldKeyTime)
-	if t, ok := data[timeKey]; ok {
-		data["fields."+timeKey] = t
-		delete(data, timeKey)
-	}
-
-	msgKey := fieldMap.resolve(FieldKeyMsg)
-	if m, ok := data[msgKey]; ok {
-		data["fields."+msgKey] = m
-		delete(data, msgKey)
-	}
-
-	levelKey := fieldMap.resolve(FieldKeyLevel)
-	if l, ok := data[levelKey]; ok {
-		data["fields."+levelKey] = l
-		delete(data, levelKey)
-	}
-
-	logrusErrKey := fieldMap.resolve(FieldKeyLogrusError)
-	if l, ok := data[logrusErrKey]; ok {
-		data["fields."+logrusErrKey] = l
-		delete(data, logrusErrKey)
-	}
-
-	// If reportCaller is not set, 'func' will not conflict.
-	if reportCaller {
-		funcKey := fieldMap.resolve(FieldKeyFunc)
-		if l, ok := data[funcKey]; ok {
-			data["fields."+funcKey] = l
-		}
-		fileKey := fieldMap.resolve(FieldKeyFile)
-		if l, ok := data[fileKey]; ok {
-			data["fields."+fileKey] = l
-		}
-	}
-}

vendor/github.com/sirupsen/logrus/hooks.go

@@ -1,34 +0,0 @@
-package logrus
-
-// A hook to be fired when logging on the logging levels returned from
-// `Levels()` on your implementation of the interface. Note that this is not
-// fired in a goroutine or a channel with workers, you should handle such
-// functionality yourself if your call is non-blocking and you don't wish for
-// the logging calls for levels returned from `Levels()` to block.
-type Hook interface {
-	Levels() []Level
-	Fire(*Entry) error
-}
-
-// Internal type for storing the hooks on a logger instance.
-type LevelHooks map[Level][]Hook
-
-// Add a hook to an instance of logger. This is called with
-// `log.Hooks.Add(new(MyHook))` where `MyHook` implements the `Hook` interface.
-func (hooks LevelHooks) Add(hook Hook) {
-	for _, level := range hook.Levels() {
-		hooks[level] = append(hooks[level], hook)
-	}
-}
-
-// Fire all the hooks for the passed level. Used by `entry.log` to fire
-// appropriate hooks for a log entry.
-func (hooks LevelHooks) Fire(level Level, entry *Entry) error {
-	for _, hook := range hooks[level] {
-		if err := hook.Fire(entry); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}

vendor/github.com/sirupsen/logrus/json_formatter.go

@@ -1,128 +0,0 @@
-package logrus
-
-import (
-	"bytes"
-	"encoding/json"
-	"fmt"
-	"runtime"
-)
-
-type fieldKey string
-
-// FieldMap allows customization of the key names for default fields.
-type FieldMap map[fieldKey]string
-
-func (f FieldMap) resolve(key fieldKey) string {
-	if k, ok := f[key]; ok {
-		return k
-	}
-
-	return string(key)
-}
-
-// JSONFormatter formats logs into parsable json
-type JSONFormatter struct {
-	// TimestampFormat sets the format used for marshaling timestamps.
-	// The format to use is the same than for time.Format or time.Parse from the standard
-	// library.
-	// The standard Library already provides a set of predefined format.
-	TimestampFormat string
-
-	// DisableTimestamp allows disabling automatic timestamps in output
-	DisableTimestamp bool
-
-	// DisableHTMLEscape allows disabling html escaping in output
-	DisableHTMLEscape bool
-
-	// DataKey allows users to put all the log entry parameters into a nested dictionary at a given key.
-	DataKey string
-
-	// FieldMap allows users to customize the names of keys for default fields.
-	// As an example:
-	// formatter := &JSONFormatter{
-	//   	FieldMap: FieldMap{
-	// 		 FieldKeyTime:  "@timestamp",
-	// 		 FieldKeyLevel: "@level",
-	// 		 FieldKeyMsg:   "@message",
-	// 		 FieldKeyFunc:  "@caller",
-	//    },
-	// }
-	FieldMap FieldMap
-
-	// CallerPrettyfier can be set by the user to modify the content
-	// of the function and file keys in the json data when ReportCaller is
-	// activated. If any of the returned value is the empty string the
-	// corresponding key will be removed from json fields.
-	CallerPrettyfier func(*runtime.Frame) (function string, file string)
-
-	// PrettyPrint will indent all json logs
-	PrettyPrint bool
-}
-
-// Format renders a single log entry
-func (f *JSONFormatter) Format(entry *Entry) ([]byte, error) {
-	data := make(Fields, len(entry.Data)+4)
-	for k, v := range entry.Data {
-		switch v := v.(type) {
-		case error:
-			// Otherwise errors are ignored by `encoding/json`
-			// https://github.com/sirupsen/logrus/issues/137
-			data[k] = v.Error()
-		default:
-			data[k] = v
-		}
-	}
-
-	if f.DataKey != "" {
-		newData := make(Fields, 4)
-		newData[f.DataKey] = data
-		data = newData
-	}
-
-	prefixFieldClashes(data, f.FieldMap, entry.HasCaller())
-
-	timestampFormat := f.TimestampFormat
-	if timestampFormat == "" {
-		timestampFormat = defaultTimestampFormat
-	}
-
-	if entry.err != "" {
-		data[f.FieldMap.resolve(FieldKeyLogrusError)] = entry.err
-	}
-	if !f.DisableTimestamp {
-		data[f.FieldMap.resolve(FieldKeyTime)] = entry.Time.Format(timestampFormat)
-	}
-	data[f.FieldMap.resolve(FieldKeyMsg)] = entry.Message
-	data[f.FieldMap.resolve(FieldKeyLevel)] = entry.Level.String()
-	if entry.HasCaller() {
-		funcVal := entry.Caller.Function
-		fileVal := fmt.Sprintf("%s:%d", entry.Caller.File, entry.Caller.Line)
-		if f.CallerPrettyfier != nil {
-			funcVal, fileVal = f.CallerPrettyfier(entry.Caller)
-		}
-		if funcVal != "" {
-			data[f.FieldMap.resolve(FieldKeyFunc)] = funcVal
-		}
-		if fileVal != "" {
-			data[f.FieldMap.resolve(FieldKeyFile)] = fileVal
-		}
-	}
-
-	var b *bytes.Buffer
-	if entry.Buffer != nil {
-		b = entry.Buffer
-	} else {
-		b = &bytes.Buffer{}
-	}
-
-	encoder := json.NewEncoder(b)
-	encoder.SetEscapeHTML(!f.DisableHTMLEscape)
-	if f.PrettyPrint {
-		encoder.SetIndent("", "  ")
-	}
-	if err := encoder.Encode(data); err != nil {
-		return nil, fmt.Errorf("failed to marshal fields to JSON, %w", err)
-	}
-
-	return b.Bytes(), nil
-}

vendor/github.com/sirupsen/logrus/logger.go

@@ -1,404 +0,0 @@
-package logrus
-
-import (
-	"context"
-	"io"
-	"os"
-	"sync"
-	"sync/atomic"
-	"time"
-)
-
-// LogFunction For big messages, it can be more efficient to pass a function
-// and only call it if the log level is actually enables rather than
-// generating the log message and then checking if the level is enabled
-type LogFunction func() []interface{}
-
-type Logger struct {
-	// The logs are `io.Copy`'d to this in a mutex. It's common to set this to a
-	// file, or leave it default which is `os.Stderr`. You can also set this to
-	// something more adventurous, such as logging to Kafka.
-	Out io.Writer
-	// Hooks for the logger instance. These allow firing events based on logging
-	// levels and log entries. For example, to send errors to an error tracking
-	// service, log to StatsD or dump the core on fatal errors.
-	Hooks LevelHooks
-	// All log entries pass through the formatter before logged to Out. The
-	// included formatters are `TextFormatter` and `JSONFormatter` for which
-	// TextFormatter is the default. In development (when a TTY is attached) it
-	// logs with colors, but to a file it wouldn't. You can easily implement your
-	// own that implements the `Formatter` interface, see the `README` or included
-	// formatters for examples.
-	Formatter Formatter
-
-	// Flag for whether to log caller info (off by default)
-	ReportCaller bool
-
-	// The logging level the logger should log at. This is typically (and defaults
-	// to) `logrus.Info`, which allows Info(), Warn(), Error() and Fatal() to be
-	// logged.
-	Level Level
-	// Used to sync writing to the log. Locking is enabled by Default
-	mu MutexWrap
-	// Reusable empty entry
-	entryPool sync.Pool
-	// Function to exit the application, defaults to `os.Exit()`
-	ExitFunc exitFunc
-}
-
-type exitFunc func(int)
-
-type MutexWrap struct {
-	lock     sync.Mutex
-	disabled bool
-}
-
-func (mw *MutexWrap) Lock() {
-	if !mw.disabled {
-		mw.lock.Lock()
-	}
-}
-
-func (mw *MutexWrap) Unlock() {
-	if !mw.disabled {
-		mw.lock.Unlock()
-	}
-}
-
-func (mw *MutexWrap) Disable() {
-	mw.disabled = true
-}
-
-// Creates a new logger. Configuration should be set by changing `Formatter`,
-// `Out` and `Hooks` directly on the default logger instance. You can also just
-// instantiate your own:
-//
-//    var log = &logrus.Logger{
-//      Out: os.Stderr,
-//      Formatter: new(logrus.TextFormatter),
-//      Hooks: make(logrus.LevelHooks),
-//      Level: logrus.DebugLevel,
-//    }
-//
-// It's recommended to make this a global instance called `log`.
-func New() *Logger {
-	return &Logger{
-		Out:          os.Stderr,
-		Formatter:    new(TextFormatter),
-		Hooks:        make(LevelHooks),
-		Level:        InfoLevel,
-		ExitFunc:     os.Exit,
-		ReportCaller: false,
-	}
-}
-
-func (logger *Logger) newEntry() *Entry {
-	entry, ok := logger.entryPool.Get().(*Entry)
-	if ok {
-		return entry
-	}
-	return NewEntry(logger)
-}
-
-func (logger *Logger) releaseEntry(entry *Entry) {
-	entry.Data = map[string]interface{}{}
-	logger.entryPool.Put(entry)
-}
-
-// WithField allocates a new entry and adds a field to it.
-// Debug, Print, Info, Warn, Error, Fatal or Panic must be then applied to
-// this new returned entry.
-// If you want multiple fields, use `WithFields`.
-func (logger *Logger) WithField(key string, value interface{}) *Entry {
-	entry := logger.newEntry()
-	defer logger.releaseEntry(entry)
-	return entry.WithField(key, value)
-}
-
-// Adds a struct of fields to the log entry. All it does is call `WithField` for
-// each `Field`.
-func (logger *Logger) WithFields(fields Fields) *Entry {
-	entry := logger.newEntry()
-	defer logger.releaseEntry(entry)
-	return entry.WithFields(fields)
-}
-
-// Add an error as single field to the log entry.  All it does is call
-// `WithError` for the given `error`.
-func (logger *Logger) WithError(err error) *Entry {
-	entry := logger.newEntry()
-	defer logger.releaseEntry(entry)
-	return entry.WithError(err)
-}
-
-// Add a context to the log entry.
-func (logger *Logger) WithContext(ctx context.Context) *Entry {
-	entry := logger.newEntry()
-	defer logger.releaseEntry(entry)
-	return entry.WithContext(ctx)
-}
-
-// Overrides the time of the log entry.
-func (logger *Logger) WithTime(t time.Time) *Entry {
-	entry := logger.newEntry()
-	defer logger.releaseEntry(entry)
-	return entry.WithTime(t)
-}
-
-func (logger *Logger) Logf(level Level, format string, args ...interface{}) {
-	if logger.IsLevelEnabled(level) {
-		entry := logger.newEntry()
-		entry.Logf(level, format, args...)
-		logger.releaseEntry(entry)
-	}
-}
-
-func (logger *Logger) Tracef(format string, args ...interface{}) {
-	logger.Logf(TraceLevel, format, args...)
-}
-
-func (logger *Logger) Debugf(format string, args ...interface{}) {
-	logger.Logf(DebugLevel, format, args...)
-}
-
-func (logger *Logger) Infof(format string, args ...interface{}) {
-	logger.Logf(InfoLevel, format, args...)
-}
-
-func (logger *Logger) Printf(format string, args ...interface{}) {
-	entry := logger.newEntry()
-	entry.Printf(format, args...)
-	logger.releaseEntry(entry)
-}
-
-func (logger *Logger) Warnf(format string, args ...interface{}) {
-	logger.Logf(WarnLevel, format, args...)
-}
-
-func (logger *Logger) Warningf(format string, args ...interface{}) {
-	logger.Warnf(format, args...)
-}
-
-func (logger *Logger) Errorf(format string, args ...interface{}) {
-	logger.Logf(ErrorLevel, format, args...)
-}
-
-func (logger *Logger) Fatalf(format string, args ...interface{}) {
-	logger.Logf(FatalLevel, format, args...)
-	logger.Exit(1)
-}
-
-func (logger *Logger) Panicf(format string, args ...interface{}) {
-	logger.Logf(PanicLevel, format, args...)
-}
-
-func (logger *Logger) Log(level Level, args ...interface{}) {
-	if logger.IsLevelEnabled(level) {
-		entry := logger.newEntry()
-		entry.Log(level, args...)
-		logger.releaseEntry(entry)
-	}
-}
-
-func (logger *Logger) LogFn(level Level, fn LogFunction) {
-	if logger.IsLevelEnabled(level) {
-		entry := logger.newEntry()
-		entry.Log(level, fn()...)
-		logger.releaseEntry(entry)
-	}
-}
-
-func (logger *Logger) Trace(args ...interface{}) {
-	logger.Log(TraceLevel, args...)
-}
-
-func (logger *Logger) Debug(args ...interface{}) {
-	logger.Log(DebugLevel, args...)
-}
-
-func (logger *Logger) Info(args ...interface{}) {
-	logger.Log(InfoLevel, args...)
-}
-
-func (logger *Logger) Print(args ...interface{}) {
-	entry := logger.newEntry()
-	entry.Print(args...)
-	logger.releaseEntry(entry)
-}
-
-func (logger *Logger) Warn(args ...interface{}) {
-	logger.Log(WarnLevel, args...)
-}
-
-func (logger *Logger) Warning(args ...interface{}) {
-	logger.Warn(args...)
-}
-
-func (logger *Logger) Error(args ...interface{}) {
-	logger.Log(ErrorLevel, args...)
-}
-
-func (logger *Logger) Fatal(args ...interface{}) {
-	logger.Log(FatalLevel, args...)
-	logger.Exit(1)
-}
-
-func (logger *Logger) Panic(args ...interface{}) {
-	logger.Log(PanicLevel, args...)
-}
-
-func (logger *Logger) TraceFn(fn LogFunction) {
-	logger.LogFn(TraceLevel, fn)
-}
-
-func (logger *Logger) DebugFn(fn LogFunction) {
-	logger.LogFn(DebugLevel, fn)
-}
-
-func (logger *Logger) InfoFn(fn LogFunction) {
-	logger.LogFn(InfoLevel, fn)
-}
-
-func (logger *Logger) PrintFn(fn LogFunction) {
-	entry := logger.newEntry()
-	entry.Print(fn()...)
-	logger.releaseEntry(entry)
-}
-
-func (logger *Logger) WarnFn(fn LogFunction) {
-	logger.LogFn(WarnLevel, fn)
-}
-
-func (logger *Logger) WarningFn(fn LogFunction) {
-	logger.WarnFn(fn)
-}
-
-func (logger *Logger) ErrorFn(fn LogFunction) {
-	logger.LogFn(ErrorLevel, fn)
-}
-
-func (logger *Logger) FatalFn(fn LogFunction) {
-	logger.LogFn(FatalLevel, fn)
-	logger.Exit(1)
-}
-
-func (logger *Logger) PanicFn(fn LogFunction) {
-	logger.LogFn(PanicLevel, fn)
-}
-
-func (logger *Logger) Logln(level Level, args ...interface{}) {
-	if logger.IsLevelEnabled(level) {
-		entry := logger.newEntry()
-		entry.Logln(level, args...)
-		logger.releaseEntry(entry)
-	}
-}
-
-func (logger *Logger) Traceln(args ...interface{}) {
-	logger.Logln(TraceLevel, args...)
-}
-
-func (logger *Logger) Debugln(args ...interface{}) {
-	logger.Logln(DebugLevel, args...)
-}
-
-func (logger *Logger) Infoln(args ...interface{}) {
-	logger.Logln(InfoLevel, args...)
-}
-
-func (logger *Logger) Println(args ...interface{}) {
-	entry := logger.newEntry()
-	entry.Println(args...)
-	logger.releaseEntry(entry)
-}
-
-func (logger *Logger) Warnln(args ...interface{}) {
-	logger.Logln(WarnLevel, args...)
-}
-
-func (logger *Logger) Warningln(args ...interface{}) {
-	logger.Warnln(args...)
-}
-
-func (logger *Logger) Errorln(args ...interface{}) {
-	logger.Logln(ErrorLevel, args...)
-}
-
-func (logger *Logger) Fatalln(args ...interface{}) {
-	logger.Logln(FatalLevel, args...)
-	logger.Exit(1)
-}
-
-func (logger *Logger) Panicln(args ...interface{}) {
-	logger.Logln(PanicLevel, args...)
-}
-
-func (logger *Logger) Exit(code int) {
-	runHandlers()
-	if logger.ExitFunc == nil {
-		logger.ExitFunc = os.Exit
-	}
-	logger.ExitFunc(code)
-}
-
-//When file is opened with appending mode, it's safe to
-//write concurrently to a file (within 4k message on Linux).
-//In these cases user can choose to disable the lock.
-func (logger *Logger) SetNoLock() {
-	logger.mu.Disable()
-}
-
-func (logger *Logger) level() Level {
-	return Level(atomic.LoadUint32((*uint32)(&logger.Level)))
-}
-
-// SetLevel sets the logger level.
-func (logger *Logger) SetLevel(level Level) {
-	atomic.StoreUint32((*uint32)(&logger.Level), uint32(level))
-}
-
-// GetLevel returns the logger level.
-func (logger *Logger) GetLevel() Level {
-	return logger.level()
-}
-
-// AddHook adds a hook to the logger hooks.
-func (logger *Logger) AddHook(hook Hook) {
-	logger.mu.Lock()
-	defer logger.mu.Unlock()
-	logger.Hooks.Add(hook)
-}
-
-// IsLevelEnabled checks if the log level of the logger is greater than the level param
-func (logger *Logger) IsLevelEnabled(level Level) bool {
-	return logger.level() >= level
-}
-
-// SetFormatter sets the logger formatter.
-func (logger *Logger) SetFormatter(formatter Formatter) {
-	logger.mu.Lock()
-	defer logger.mu.Unlock()
-	logger.Formatter = formatter
-}
-
-// SetOutput sets the logger output.
-func (logger *Logger) SetOutput(output io.Writer) {
-	logger.mu.Lock()
-	defer logger.mu.Unlock()
-	logger.Out = output
-}
-
-func (logger *Logger) SetReportCaller(reportCaller bool) {
-	logger.mu.Lock()
-	defer logger.mu.Unlock()
-	logger.ReportCaller = reportCaller
-}
-
-// ReplaceHooks replaces the logger hooks and returns the old ones
-func (logger *Logger) ReplaceHooks(hooks LevelHooks) LevelHooks {
-	logger.mu.Lock()
-	oldHooks := logger.Hooks
-	logger.Hooks = hooks
-	logger.mu.Unlock()
-	return oldHooks
-}

vendor/github.com/sirupsen/logrus/logrus.go

@@ -1,186 +0,0 @@
-package logrus
-
-import (
-	"fmt"
-	"log"
-	"strings"
-)
-
-// Fields type, used to pass to `WithFields`.
-type Fields map[string]interface{}
-
-// Level type
-type Level uint32
-
-// Convert the Level to a string. E.g. PanicLevel becomes "panic".
-func (level Level) String() string {
-	if b, err := level.MarshalText(); err == nil {
-		return string(b)
-	} else {
-		return "unknown"
-	}
-}
-
-// ParseLevel takes a string level and returns the Logrus log level constant.
-func ParseLevel(lvl string) (Level, error) {
-	switch strings.ToLower(lvl) {
-	case "panic":
-		return PanicLevel, nil
-	case "fatal":
-		return FatalLevel, nil
-	case "error":
-		return ErrorLevel, nil
-	case "warn", "warning":
-		return WarnLevel, nil
-	case "info":
-		return InfoLevel, nil
-	case "debug":
-		return DebugLevel, nil
-	case "trace":
-		return TraceLevel, nil
-	}
-
-	var l Level
-	return l, fmt.Errorf("not a valid logrus Level: %q", lvl)
-}
-
-// UnmarshalText implements encoding.TextUnmarshaler.
-func (level *Level) UnmarshalText(text []byte) error {
-	l, err := ParseLevel(string(text))
-	if err != nil {
-		return err
-	}
-
-	*level = l
-
-	return nil
-}
-
-func (level Level) MarshalText() ([]byte, error) {
-	switch level {
-	case TraceLevel:
-		return []byte("trace"), nil
-	case DebugLevel:
-		return []byte("debug"), nil
-	case InfoLevel:
-		return []byte("info"), nil
-	case WarnLevel:
-		return []byte("warning"), nil
-	case ErrorLevel:
-		return []byte("error"), nil
-	case FatalLevel:
-		return []byte("fatal"), nil
-	case PanicLevel:
-		return []byte("panic"), nil
-	}
-
-	return nil, fmt.Errorf("not a valid logrus level %d", level)
-}
-
-// A constant exposing all logging levels
-var AllLevels = []Level{
-	PanicLevel,
-	FatalLevel,
-	ErrorLevel,
-	WarnLevel,
-	InfoLevel,
-	DebugLevel,
-	TraceLevel,
-}
-
-// These are the different logging levels. You can set the logging level to log
-// on your instance of logger, obtained with `logrus.New()`.
-const (
-	// PanicLevel level, highest level of severity. Logs and then calls panic with the
-	// message passed to Debug, Info, ...
-	PanicLevel Level = iota
-	// FatalLevel level. Logs and then calls `logger.Exit(1)`. It will exit even if the
-	// logging level is set to Panic.
-	FatalLevel
-	// ErrorLevel level. Logs. Used for errors that should definitely be noted.
-	// Commonly used for hooks to send errors to an error tracking service.
-	ErrorLevel
-	// WarnLevel level. Non-critical entries that deserve eyes.
-	WarnLevel
-	// InfoLevel level. General operational entries about what's going on inside the
-	// application.
-	InfoLevel
-	// DebugLevel level. Usually only enabled when debugging. Very verbose logging.
-	DebugLevel
-	// TraceLevel level. Designates finer-grained informational events than the Debug.
-	TraceLevel
-)
-
-// Won't compile if StdLogger can't be realized by a log.Logger
-var (
-	_ StdLogger = &log.Logger{}
-	_ StdLogger = &Entry{}
-	_ StdLogger = &Logger{}
-)
-
-// StdLogger is what your logrus-enabled library should take, that way
-// it'll accept a stdlib logger and a logrus logger. There's no standard
-// interface, this is the closest we get, unfortunately.
-type StdLogger interface {
-	Print(...interface{})
-	Printf(string, ...interface{})
-	Println(...interface{})
-
-	Fatal(...interface{})
-	Fatalf(string, ...interface{})
-	Fatalln(...interface{})
-
-	Panic(...interface{})
-	Panicf(string, ...interface{})
-	Panicln(...interface{})
-}
-
-// The FieldLogger interface generalizes the Entry and Logger types
-type FieldLogger interface {
-	WithField(key string, value interface{}) *Entry
-	WithFields(fields Fields) *Entry
-	WithError(err error) *Entry
-
-	Debugf(format string, args ...interface{})
-	Infof(format string, args ...interface{})
-	Printf(format string, args ...interface{})
-	Warnf(format string, args ...interface{})
-	Warningf(format string, args ...interface{})
-	Errorf(format string, args ...interface{})
-	Fatalf(format string, args ...interface{})
-	Panicf(format string, args ...interface{})
-
-	Debug(args ...interface{})
-	Info(args ...interface{})
-	Print(args ...interface{})
-	Warn(args ...interface{})
-	Warning(args ...interface{})
-	Error(args ...interface{})
-	Fatal(args ...interface{})
-	Panic(args ...interface{})
-
-	Debugln(args ...interface{})
-	Infoln(args ...interface{})
-	Println(args ...interface{})
-	Warnln(args ...interface{})
-	Warningln(args ...interface{})
-	Errorln(args ...interface{})
-	Fatalln(args ...interface{})
-	Panicln(args ...interface{})
-
-	// IsDebugEnabled() bool
-	// IsInfoEnabled() bool
-	// IsWarnEnabled() bool
-	// IsErrorEnabled() bool
-	// IsFatalEnabled() bool
-	// IsPanicEnabled() bool
-}
-
-// Ext1FieldLogger (the first extension to FieldLogger) is superfluous, it is
-// here for consistancy. Do not use. Use Logger or Entry instead.
-type Ext1FieldLogger interface {
-	FieldLogger
-	Tracef(format string, args ...interface{})
-	Trace(args ...interface{})
-	Traceln(args ...interface{})
-}

vendor/github.com/sirupsen/logrus/terminal_check_appengine.go

@@ -1,11 +0,0 @@
-// +build appengine
-
-package logrus
-
-import (
-	"io"
-)
-
-func checkIfTerminal(w io.Writer) bool {
-	return true
-}

vendor/github.com/sirupsen/logrus/terminal_check_bsd.go

@@ -1,13 +0,0 @@
-// +build darwin dragonfly freebsd netbsd openbsd
-// +build !js
-
-package logrus
-
-import "golang.org/x/sys/unix"
-
-const ioctlReadTermios = unix.TIOCGETA
-
-func isTerminal(fd int) bool {
-	_, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
-	return err == nil
-}

vendor/github.com/sirupsen/logrus/terminal_check_js.go

@@ -1,7 +0,0 @@
-// +build js
-
-package logrus
-
-func isTerminal(fd int) bool {
-	return false
-}

vendor/github.com/sirupsen/logrus/terminal_check_no_terminal.go

@@ -1,11 +0,0 @@
-// +build js nacl plan9
-
-package logrus
-
-import (
-	"io"
-)
-
-func checkIfTerminal(w io.Writer) bool {
-	return false
-}

vendor/github.com/sirupsen/logrus/terminal_check_notappengine.go

@@ -1,17 +0,0 @@
-// +build !appengine,!js,!windows,!nacl,!plan9
-
-package logrus
-
-import (
-	"io"
-	"os"
-)
-
-func checkIfTerminal(w io.Writer) bool {
-	switch v := w.(type) {
-	case *os.File:
-		return isTerminal(int(v.Fd()))
-	default:
-		return false
-	}
-}

vendor/github.com/sirupsen/logrus/terminal_check_solaris.go

@@ -1,11 +0,0 @@
-package logrus
-
-import (
-	"golang.org/x/sys/unix"
-)
-
-// IsTerminal returns true if the given file descriptor is a terminal.
-func isTerminal(fd int) bool {
-	_, err := unix.IoctlGetTermio(fd, unix.TCGETA)
-	return err == nil
-}

vendor/github.com/sirupsen/logrus/terminal_check_unix.go

@@ -1,13 +0,0 @@
-// +build linux aix zos
-// +build !js
-
-package logrus
-
-import "golang.org/x/sys/unix"
-
-const ioctlReadTermios = unix.TCGETS
-
-func isTerminal(fd int) bool {
-	_, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
-	return err == nil
-}

vendor/github.com/sirupsen/logrus/terminal_check_windows.go

@@ -1,27 +0,0 @@
-// +build !appengine,!js,windows
-
-package logrus
-
-import (
-	"io"
-	"os"
-
-	"golang.org/x/sys/windows"
-)
-
-func checkIfTerminal(w io.Writer) bool {
-	switch v := w.(type) {
-	case *os.File:
-		handle := windows.Handle(v.Fd())
-		var mode uint32
-		if err := windows.GetConsoleMode(handle, &mode); err != nil {
-			return false
-		}
-		mode |= windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING
-		if err := windows.SetConsoleMode(handle, mode); err != nil {
-			return false
-		}
-		return true
-	}
-	return false
-}

vendor/github.com/sirupsen/logrus/text_formatter.go

@@ -1,339 +0,0 @@
-package logrus
-
-import (
-	"bytes"
-	"fmt"
-	"os"
-	"runtime"
-	"sort"
-	"strconv"
-	"strings"
-	"sync"
-	"time"
-	"unicode/utf8"
-)
-
-const (
-	red    = 31
-	yellow = 33
-	blue   = 36
-	gray   = 37
-)
-
-var baseTimestamp time.Time
-
-func init() {
-	baseTimestamp = time.Now()
-}
-
-// TextFormatter formats logs into text
-type TextFormatter struct {
-	// Set to true to bypass checking for a TTY before outputting colors.
-	ForceColors bool
-
-	// Force disabling colors.
-	DisableColors bool
-
-	// Force quoting of all values
-	ForceQuote bool
-
-	// DisableQuote disables quoting for all values.
-	// DisableQuote will have a lower priority than ForceQuote.
-	// If both of them are set to true, quote will be forced on all values.
-	DisableQuote bool
-
-	// Override coloring based on CLICOLOR and CLICOLOR_FORCE. - https://bixense.com/clicolors/
-	EnvironmentOverrideColors bool
-
-	// Disable timestamp logging. useful when output is redirected to logging
-	// system that already adds timestamps.
-	DisableTimestamp bool
-
-	// Enable logging the full timestamp when a TTY is attached instead of just
-	// the time passed since beginning of execution.
-	FullTimestamp bool
-
-	// TimestampFormat to use for display when a full timestamp is printed.
-	// The format to use is the same than for time.Format or time.Parse from the standard
-	// library.
-	// The standard Library already provides a set of predefined format.
-	TimestampFormat string
-
-	// The fields are sorted by default for a consistent output. For applications
-	// that log extremely frequently and don't use the JSON formatter this may not
-	// be desired.
-	DisableSorting bool
-
-	// The keys sorting function, when uninitialized it uses sort.Strings.
-	SortingFunc func([]string)
-
-	// Disables the truncation of the level text to 4 characters.
-	DisableLevelTruncation bool
-
-	// PadLevelText Adds padding the level text so that all the levels output at the same length
-	// PadLevelText is a superset of the DisableLevelTruncation option
-	PadLevelText bool
-
-	// QuoteEmptyFields will wrap empty fields in quotes if true
-	QuoteEmptyFields bool
-
-	// Whether the logger's out is to a terminal
-	isTerminal bool
-
-	// FieldMap allows users to customize the names of keys for default fields.
-	// As an example:
-	// formatter := &TextFormatter{
-	//     FieldMap: FieldMap{
-	//         FieldKeyTime:  "@timestamp",
-	//         FieldKeyLevel: "@level",
-	//         FieldKeyMsg:   "@message"}}
-	FieldMap FieldMap
-
-	// CallerPrettyfier can be set by the user to modify the content
-	// of the function and file keys in the data when ReportCaller is
-	// activated. If any of the returned value is the empty string the
-	// corresponding key will be removed from fields.
-	CallerPrettyfier func(*runtime.Frame) (function string, file string)
-
-	terminalInitOnce sync.Once
-
-	// The max length of the level text, generated dynamically on init
-	levelTextMaxLength int
-}
-
-func (f *TextFormatter) init(entry *Entry) {
-	if entry.Logger != nil {
-		f.isTerminal = checkIfTerminal(entry.Logger.Out)
-	}
-	// Get the max length of the level text
-	for _, level := range AllLevels {
-		levelTextLength := utf8.RuneCount([]byte(level.String()))
-		if levelTextLength > f.levelTextMaxLength {
-			f.levelTextMaxLength = levelTextLength
-		}
-	}
-}
-
-func (f *TextFormatter) isColored() bool {
-	isColored := f.ForceColors || (f.isTerminal && (runtime.GOOS != "windows"))
-
-	if f.EnvironmentOverrideColors {
-		switch force, ok := os.LookupEnv("CLICOLOR_FORCE"); {
-		case ok && force != "0":
-			isColored = true
-		case ok && force == "0", os.Getenv("CLICOLOR") == "0":
-			isColored = false
-		}
-	}
-
-	return isColored && !f.DisableColors
-}
-
-// Format renders a single log entry
-func (f *TextFormatter) Format(entry *Entry) ([]byte, error) {
-	data := make(Fields)
-	for k, v := range entry.Data {
-		data[k] = v
-	}
-	prefixFieldClashes(data, f.FieldMap, entry.HasCaller())
-	keys := make([]string, 0, len(data))
-	for k := range data {
-		keys = append(keys, k)
-	}
-
-	var funcVal, fileVal string
-
-	fixedKeys := make([]string, 0, 4+len(data))
-	if !f.DisableTimestamp {
-		fixedKeys = append(fixedKeys, f.FieldMap.resolve(FieldKeyTime))
-	}
-	fixedKeys = append(fixedKeys, f.FieldMap.resolve(FieldKeyLevel))
-	if entry.Message != "" {
-		fixedKeys = append(fixedKeys, f.FieldMap.resolve(FieldKeyMsg))
-	}
-	if entry.err != "" {
-		fixedKeys = append(fixedKeys, f.FieldMap.resolve(FieldKeyLogrusError))
-	}
-	if entry.HasCaller() {
-		if f.CallerPrettyfier != nil {
-			funcVal, fileVal = f.CallerPrettyfier(entry.Caller)
-		} else {
-			funcVal = entry.Caller.Function
-			fileVal = fmt.Sprintf("%s:%d", entry.Caller.File, entry.Caller.Line)
-		}
-
-		if funcVal != "" {
-			fixedKeys = append(fixedKeys, f.FieldMap.resolve(FieldKeyFunc))
-		}
-		if fileVal != "" {
-			fixedKeys = append(fixedKeys, f.FieldMap.resolve(FieldKeyFile))
-		}
-	}
-
-	if !f.DisableSorting {
-		if f.SortingFunc == nil {
-			sort.Strings(keys)
-			fixedKeys = append(fixedKeys, keys...)
-		} else {
-			if !f.isColored() {
-				fixedKeys = append(fixedKeys, keys...)
-				f.SortingFunc(fixedKeys)
-			} else {
-				f.SortingFunc(keys)
-			}
-		}
-	} else {
-		fixedKeys = append(fixedKeys, keys...)
-	}
-
-	var b *bytes.Buffer
-	if entry.Buffer != nil {
-		b = entry.Buffer
-	} else {
-		b = &bytes.Buffer{}
-	}
-
-	f.terminalInitOnce.Do(func() { f.init(entry) })
-
-	timestampFormat := f.TimestampFormat
-	if timestampFormat == "" {
-		timestampFormat = defaultTimestampFormat
-	}
-	if f.isColored() {
-		f.printColored(b, entry, keys, data, timestampFormat)
-	} else {
-
-		for _, key := range fixedKeys {
-			var value interface{}
-			switch {
-			case key == f.FieldMap.resolve(FieldKeyTime):
-				value = entry.Time.Format(timestampFormat)
-			case key == f.FieldMap.resolve(FieldKeyLevel):
-				value = entry.Level.String()
-			case key == f.FieldMap.resolve(FieldKeyMsg):
-				value = entry.Message
-			case key == f.FieldMap.resolve(FieldKeyLogrusError):
-				value = entry.err
-			case key == f.FieldMap.resolve(FieldKeyFunc) && entry.HasCaller():
-				value = funcVal
-			case key == f.FieldMap.resolve(FieldKeyFile) && entry.HasCaller():
-				value = fileVal
-			default:
-				value = data[key]
-			}
-			f.appendKeyValue(b, key, value)
-		}
-	}
-
-	b.WriteByte('\n')
-	return b.Bytes(), nil
-}
-
-func (f *TextFormatter) printColored(b *bytes.Buffer, entry *Entry, keys []string, data Fields, timestampFormat string) {
-	var levelColor int
-	switch entry.Level {
-	case DebugLevel, TraceLevel:
-		levelColor = gray
-	case WarnLevel:
-		levelColor = yellow
-	case ErrorLevel, FatalLevel, PanicLevel:
-		levelColor = red
-	case InfoLevel:
-		levelColor = blue
-	default:
-		levelColor = blue
-	}
-
-	levelText := strings.ToUpper(entry.Level.String())
-	if !f.DisableLevelTruncation && !f.PadLevelText {
-		levelText = levelText[0:4]
-	}
-	if f.PadLevelText {
-		// Generates the format string used in the next line, for example "%-6s" or "%-7s".
-		// Based on the max level text length.
-		formatString := "%-" + strconv.Itoa(f.levelTextMaxLength) + "s"
-		// Formats the level text by appending spaces up to the max length, for example:
-		// 	- "INFO   "
-		//	- "WARNING"
-		levelText = fmt.Sprintf(formatString, levelText)
-	}
-
-	// Remove a single newline if it already exists in the message to keep
-	// the behavior of logrus text_formatter the same as the stdlib log package
-	entry.Message = strings.TrimSuffix(entry.Message, "\n")
-
-	caller := ""
-	if entry.HasCaller() {
-		funcVal := fmt.Sprintf("%s()", entry.Caller.Function)
-		fileVal := fmt.Sprintf("%s:%d", entry.Caller.File, entry.Caller.Line)
-
-		if f.CallerPrettyfier != nil {
-			funcVal, fileVal = f.CallerPrettyfier(entry.Caller)
-		}
-
-		if fileVal == "" {
-			caller = funcVal
-		} else if funcVal == "" {
-			caller = fileVal
-		} else {
-			caller = fileVal + " " + funcVal
-		}
-	}
-
-	switch {
-	case f.DisableTimestamp:
-		fmt.Fprintf(b, "\x1b[%dm%s\x1b[0m%s %-44s ", levelColor, levelText, caller, entry.Message)
-	case !f.FullTimestamp:
-		fmt.Fprintf(b, "\x1b[%dm%s\x1b[0m[%04d]%s %-44s ", levelColor, levelText, int(entry.Time.Sub(baseTimestamp)/time.Second), caller, entry.Message)
-	default:
-		fmt.Fprintf(b, "\x1b[%dm%s\x1b[0m[%s]%s %-44s ", levelColor, levelText, entry.Time.Format(timestampFormat), caller, entry.Message)
-	}
-	for _, k := range keys {
-		v := data[k]
-		fmt.Fprintf(b, " \x1b[%dm%s\x1b[0m=", levelColor, k)
-		f.appendValue(b, v)
-	}
-}
-
-func (f *TextFormatter) needsQuoting(text string) bool {
-	if f.ForceQuote {
-		return true
-	}
-	if f.QuoteEmptyFields && len(text) == 0 {
-		return true
-	}
-	if f.DisableQuote {
-		return false
-	}
-	for _, ch := range text {
-		if !((ch >= 'a' && ch <= 'z') ||
-			(ch >= 'A' && ch <= 'Z') ||
-			(ch >= '0' && ch <= '9') ||
-			ch == '-' || ch == '.' || ch == '_' || ch == '/' || ch == '@' || ch == '^' || ch == '+') {
-			return true
-		}
-	}
-	return false
-}
-
-func (f *TextFormatter) appendKeyValue(b *bytes.Buffer, key string, value interface{}) {
-	if b.Len() > 0 {
-		b.WriteByte(' ')
-	}
-	b.WriteString(key)
-	b.WriteByte('=')
-	f.appendValue(b, value)
-}
-
-func (f *TextFormatter) appendValue(b *bytes.Buffer, value interface{}) {
-	stringVal, ok := value.(string)
-	if !ok {
-		stringVal = fmt.Sprint(value)
-	}
-
-	if !f.needsQuoting(stringVal) {
-		b.WriteString(stringVal)
-	} else {
-		b.WriteString(fmt.Sprintf("%q", stringVal))
-	}
-}

vendor/github.com/sirupsen/logrus/writer.go

@@ -1,70 +0,0 @@
-package logrus
-
-import (
-	"bufio"
-	"io"
-	"runtime"
-)
-
-// Writer at INFO level. See WriterLevel for details.
-func (logger *Logger) Writer() *io.PipeWriter {
-	return logger.WriterLevel(InfoLevel)
-}
-
-// WriterLevel returns an io.Writer that can be used to write arbitrary text to
-// the logger at the given log level. Each line written to the writer will be
-// printed in the usual way using formatters and hooks. The writer is part of an
-// io.Pipe and it is the callers responsibility to close the writer when done.
-// This can be used to override the standard library logger easily.
-func (logger *Logger) WriterLevel(level Level) *io.PipeWriter {
-	return NewEntry(logger).WriterLevel(level)
-}
-
-func (entry *Entry) Writer() *io.PipeWriter {
-	return entry.WriterLevel(InfoLevel)
-}
-
-func (entry *Entry) WriterLevel(level Level) *io.PipeWriter {
-	reader, writer := io.Pipe()
-
-	var printFunc func(args ...interface{})
-
-	switch level {
-	case TraceLevel:
-		printFunc = entry.Trace
-	case DebugLevel:
-		printFunc = entry.Debug
-	case InfoLevel:
-		printFunc = entry.Info
-	case WarnLevel:
-		printFunc = entry.Warn
-	case ErrorLevel:
-		printFunc = entry.Error
-	case FatalLevel:
-		printFunc = entry.Fatal
-	case PanicLevel:
-		printFunc = entry.Panic
-	default:
-		printFunc = entry.Print
-	}
-
-	go entry.writerScanner(reader, printFunc)
-	runtime.SetFinalizer(writer, writerFinalizer)
-
-	return writer
-}
-
-func (entry *Entry) writerScanner(reader *io.PipeReader, printFunc func(args ...interface{})) {
-	scanner := bufio.NewScanner(reader)
-	for scanner.Scan() {
-		printFunc(scanner.Text())
-	}
-	if err := scanner.Err(); err != nil {
-		entry.Errorf("Error while reading from Writer: %s", err)
-	}
-	reader.Close()
-}
-
-func writerFinalizer(writer *io.PipeWriter) {
-	writer.Close()
-}

vendor/golang.org/x/image/bmp/reader.go

@@ -0,0 +1,213 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package bmp implements a BMP image decoder and encoder.
+//
+// The BMP specification is at http://www.digicamsoft.com/bmp/bmp.html.
+package bmp // import "golang.org/x/image/bmp"
+
+import (
+	"errors"
+	"image"
+	"image/color"
+	"io"
+)
+
+// ErrUnsupported means that the input BMP image uses a valid but unsupported
+// feature.
+var ErrUnsupported = errors.New("bmp: unsupported BMP image")
+
+func readUint16(b []byte) uint16 {
+	return uint16(b[0]) | uint16(b[1])<<8
+}
+
+func readUint32(b []byte) uint32 {
+	return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
+}
+
+// decodePaletted reads an 8 bit-per-pixel BMP image from r.
+// If topDown is false, the image rows will be read bottom-up.
+func decodePaletted(r io.Reader, c image.Config, topDown bool) (image.Image, error) {
+	paletted := image.NewPaletted(image.Rect(0, 0, c.Width, c.Height), c.ColorModel.(color.Palette))
+	if c.Width == 0 || c.Height == 0 {
+		return paletted, nil
+	}
+	var tmp [4]byte
+	y0, y1, yDelta := c.Height-1, -1, -1
+	if topDown {
+		y0, y1, yDelta = 0, c.Height, +1
+	}
+	for y := y0; y != y1; y += yDelta {
+		p := paletted.Pix[y*paletted.Stride : y*paletted.Stride+c.Width]
+		if _, err := io.ReadFull(r, p); err != nil {
+			return nil, err
+		}
+		// Each row is 4-byte aligned.
+		if c.Width%4 != 0 {
+			_, err := io.ReadFull(r, tmp[:4-c.Width%4])
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+	return paletted, nil
+}
+
+// decodeRGB reads a 24 bit-per-pixel BMP image from r.
+// If topDown is false, the image rows will be read bottom-up.
+func decodeRGB(r io.Reader, c image.Config, topDown bool) (image.Image, error) {
+	rgba := image.NewRGBA(image.Rect(0, 0, c.Width, c.Height))
+	if c.Width == 0 || c.Height == 0 {
+		return rgba, nil
+	}
+	// There are 3 bytes per pixel, and each row is 4-byte aligned.
+	b := make([]byte, (3*c.Width+3)&^3)
+	y0, y1, yDelta := c.Height-1, -1, -1
+	if topDown {
+		y0, y1, yDelta = 0, c.Height, +1
+	}
+	for y := y0; y != y1; y += yDelta {
+		if _, err := io.ReadFull(r, b); err != nil {
+			return nil, err
+		}
+		p := rgba.Pix[y*rgba.Stride : y*rgba.Stride+c.Width*4]
+		for i, j := 0, 0; i < len(p); i, j = i+4, j+3 {
+			// BMP images are stored in BGR order rather than RGB order.
+			p[i+0] = b[j+2]
+			p[i+1] = b[j+1]
+			p[i+2] = b[j+0]
+			p[i+3] = 0xFF
+		}
+	}
+	return rgba, nil
+}
+
+// decodeNRGBA reads a 32 bit-per-pixel BMP image from r.
+// If topDown is false, the image rows will be read bottom-up.
+func decodeNRGBA(r io.Reader, c image.Config, topDown bool) (image.Image, error) {
+	rgba := image.NewNRGBA(image.Rect(0, 0, c.Width, c.Height))
+	if c.Width == 0 || c.Height == 0 {
+		return rgba, nil
+	}
+	y0, y1, yDelta := c.Height-1, -1, -1
+	if topDown {
+		y0, y1, yDelta = 0, c.Height, +1
+	}
+	for y := y0; y != y1; y += yDelta {
+		p := rgba.Pix[y*rgba.Stride : y*rgba.Stride+c.Width*4]
+		if _, err := io.ReadFull(r, p); err != nil {
+			return nil, err
+		}
+		for i := 0; i < len(p); i += 4 {
+			// BMP images are stored in BGRA order rather than RGBA order.
+			p[i+0], p[i+2] = p[i+2], p[i+0]
+		}
+	}
+	return rgba, nil
+}
+
+// Decode reads a BMP image from r and returns it as an image.Image.
+// Limitation: The file must be 8, 24 or 32 bits per pixel.
+func Decode(r io.Reader) (image.Image, error) {
+	c, bpp, topDown, err := decodeConfig(r)
+	if err != nil {
+		return nil, err
+	}
+	switch bpp {
+	case 8:
+		return decodePaletted(r, c, topDown)
+	case 24:
+		return decodeRGB(r, c, topDown)
+	case 32:
+		return decodeNRGBA(r, c, topDown)
+	}
+	panic("unreachable")
+}
+
+// DecodeConfig returns the color model and dimensions of a BMP image without
+// decoding the entire image.
+// Limitation: The file must be 8, 24 or 32 bits per pixel.
+func DecodeConfig(r io.Reader) (image.Config, error) {
+	config, _, _, err := decodeConfig(r)
+	return config, err
+}
+
+func decodeConfig(r io.Reader) (config image.Config, bitsPerPixel int, topDown bool, err error) {
+	// We only support those BMP images that are a BITMAPFILEHEADER
+	// immediately followed by a BITMAPINFOHEADER.
+	const (
+		fileHeaderLen   = 14
+		infoHeaderLen   = 40
+		v4InfoHeaderLen = 108
+		v5InfoHeaderLen = 124
+	)
+	var b [1024]byte
+	if _, err := io.ReadFull(r, b[:fileHeaderLen+4]); err != nil {
+		return image.Config{}, 0, false, err
+	}
+	if string(b[:2]) != "BM" {
+		return image.Config{}, 0, false, errors.New("bmp: invalid format")
+	}
+	offset := readUint32(b[10:14])
+	infoLen := readUint32(b[14:18])
+	if infoLen != infoHeaderLen && infoLen != v4InfoHeaderLen && infoLen != v5InfoHeaderLen {
+		return image.Config{}, 0, false, ErrUnsupported
+	}
+	if _, err := io.ReadFull(r, b[fileHeaderLen+4:fileHeaderLen+infoLen]); err != nil {
+		return image.Config{}, 0, false, err
+	}
+	width := int(int32(readUint32(b[18:22])))
+	height := int(int32(readUint32(b[22:26])))
+	if height < 0 {
+		height, topDown = -height, true
+	}
+	if width < 0 || height < 0 {
+		return image.Config{}, 0, false, ErrUnsupported
+	}
+	// We only support 1 plane and 8, 24 or 32 bits per pixel and no
+	// compression.
+	planes, bpp, compression := readUint16(b[26:28]), readUint16(b[28:30]), readUint32(b[30:34])
+	// if compression is set to BITFIELDS, but the bitmask is set to the default bitmask
+	// that would be used if compression was set to 0, we can continue as if compression was 0
+	if compression == 3 && infoLen > infoHeaderLen &&
+		readUint32(b[54:58]) == 0xff0000 && readUint32(b[58:62]) == 0xff00 &&
+		readUint32(b[62:66]) == 0xff && readUint32(b[66:70]) == 0xff000000 {
+		compression = 0
+	}
+	if planes != 1 || compression != 0 {
+		return image.Config{}, 0, false, ErrUnsupported
+	}
+	switch bpp {
+	case 8:
+		if offset != fileHeaderLen+infoLen+256*4 {
+			return image.Config{}, 0, false, ErrUnsupported
+		}
+		_, err = io.ReadFull(r, b[:256*4])
+		if err != nil {
+			return image.Config{}, 0, false, err
+		}
+		pcm := make(color.Palette, 256)
+		for i := range pcm {
+			// BMP images are stored in BGR order rather than RGB order.
+			// Every 4th byte is padding.
+			pcm[i] = color.RGBA{b[4*i+2], b[4*i+1], b[4*i+0], 0xFF}
+		}
+		return image.Config{ColorModel: pcm, Width: width, Height: height}, 8, topDown, nil
+	case 24:
+		if offset != fileHeaderLen+infoLen {
+			return image.Config{}, 0, false, ErrUnsupported
+		}
+		return image.Config{ColorModel: color.RGBAModel, Width: width, Height: height}, 24, topDown, nil
+	case 32:
+		if offset != fileHeaderLen+infoLen {
+			return image.Config{}, 0, false, ErrUnsupported
+		}
+		return image.Config{ColorModel: color.RGBAModel, Width: width, Height: height}, 32, topDown, nil
+	}
+	return image.Config{}, 0, false, ErrUnsupported
+}
+
+func init() {
+	image.RegisterFormat("bmp", "BM????\x00\x00\x00\x00", Decode, DecodeConfig)
+}

vendor/golang.org/x/image/bmp/writer.go

@@ -0,0 +1,262 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package bmp
+
+import (
+	"encoding/binary"
+	"errors"
+	"image"
+	"io"
+)
+
+type header struct {
+	sigBM           [2]byte
+	fileSize        uint32
+	resverved       [2]uint16
+	pixOffset       uint32
+	dibHeaderSize   uint32
+	width           uint32
+	height          uint32
+	colorPlane      uint16
+	bpp             uint16
+	compression     uint32
+	imageSize       uint32
+	xPixelsPerMeter uint32
+	yPixelsPerMeter uint32
+	colorUse        uint32
+	colorImportant  uint32
+}
+
+func encodePaletted(w io.Writer, pix []uint8, dx, dy, stride, step int) error {
+	var padding []byte
+	if dx < step {
+		padding = make([]byte, step-dx)
+	}
+	for y := dy - 1; y >= 0; y-- {
+		min := y*stride + 0
+		max := y*stride + dx
+		if _, err := w.Write(pix[min:max]); err != nil {
+			return err
+		}
+		if padding != nil {
+			if _, err := w.Write(padding); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func encodeRGBA(w io.Writer, pix []uint8, dx, dy, stride, step int, opaque bool) error {
+	buf := make([]byte, step)
+	if opaque {
+		for y := dy - 1; y >= 0; y-- {
+			min := y*stride + 0
+			max := y*stride + dx*4
+			off := 0
+			for i := min; i < max; i += 4 {
+				buf[off+2] = pix[i+0]
+				buf[off+1] = pix[i+1]
+				buf[off+0] = pix[i+2]
+				off += 3
+			}
+			if _, err := w.Write(buf); err != nil {
+				return err
+			}
+		}
+	} else {
+		for y := dy - 1; y >= 0; y-- {
+			min := y*stride + 0
+			max := y*stride + dx*4
+			off := 0
+			for i := min; i < max; i += 4 {
+				a := uint32(pix[i+3])
+				if a == 0 {
+					buf[off+2] = 0
+					buf[off+1] = 0
+					buf[off+0] = 0
+					buf[off+3] = 0
+					off += 4
+					continue
+				} else if a == 0xff {
+					buf[off+2] = pix[i+0]
+					buf[off+1] = pix[i+1]
+					buf[off+0] = pix[i+2]
+					buf[off+3] = 0xff
+					off += 4
+					continue
+				}
+				buf[off+2] = uint8(((uint32(pix[i+0]) * 0xffff) / a) >> 8)
+				buf[off+1] = uint8(((uint32(pix[i+1]) * 0xffff) / a) >> 8)
+				buf[off+0] = uint8(((uint32(pix[i+2]) * 0xffff) / a) >> 8)
+				buf[off+3] = uint8(a)
+				off += 4
+			}
+			if _, err := w.Write(buf); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func encodeNRGBA(w io.Writer, pix []uint8, dx, dy, stride, step int, opaque bool) error {
+	buf := make([]byte, step)
+	if opaque {
+		for y := dy - 1; y >= 0; y-- {
+			min := y*stride + 0
+			max := y*stride + dx*4
+			off := 0
+			for i := min; i < max; i += 4 {
+				buf[off+2] = pix[i+0]
+				buf[off+1] = pix[i+1]
+				buf[off+0] = pix[i+2]
+				off += 3
+			}
+			if _, err := w.Write(buf); err != nil {
+				return err
+			}
+		}
+	} else {
+		for y := dy - 1; y >= 0; y-- {
+			min := y*stride + 0
+			max := y*stride + dx*4
+			off := 0
+			for i := min; i < max; i += 4 {
+				buf[off+2] = pix[i+0]
+				buf[off+1] = pix[i+1]
+				buf[off+0] = pix[i+2]
+				buf[off+3] = pix[i+3]
+				off += 4
+			}
+			if _, err := w.Write(buf); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func encode(w io.Writer, m image.Image, step int) error {
+	b := m.Bounds()
+	buf := make([]byte, step)
+	for y := b.Max.Y - 1; y >= b.Min.Y; y-- {
+		off := 0
+		for x := b.Min.X; x < b.Max.X; x++ {
+			r, g, b, _ := m.At(x, y).RGBA()
+			buf[off+2] = byte(r >> 8)
+			buf[off+1] = byte(g >> 8)
+			buf[off+0] = byte(b >> 8)
+			off += 3
+		}
+		if _, err := w.Write(buf); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// Encode writes the image m to w in BMP format.
+func Encode(w io.Writer, m image.Image) error {
+	d := m.Bounds().Size()
+	if d.X < 0 || d.Y < 0 {
+		return errors.New("bmp: negative bounds")
+	}
+	h := &header{
+		sigBM:         [2]byte{'B', 'M'},
+		fileSize:      14 + 40,
+		pixOffset:     14 + 40,
+		dibHeaderSize: 40,
+		width:         uint32(d.X),
+		height:        uint32(d.Y),
+		colorPlane:    1,
+	}
+
+	var step int
+	var palette []byte
+	var opaque bool
+	switch m := m.(type) {
+	case *image.Gray:
+		step = (d.X + 3) &^ 3
+		palette = make([]byte, 1024)
+		for i := 0; i < 256; i++ {
+			palette[i*4+0] = uint8(i)
+			palette[i*4+1] = uint8(i)
+			palette[i*4+2] = uint8(i)
+			palette[i*4+3] = 0xFF
+		}
+		h.imageSize = uint32(d.Y * step)
+		h.fileSize += uint32(len(palette)) + h.imageSize
+		h.pixOffset += uint32(len(palette))
+		h.bpp = 8
+
+	case *image.Paletted:
+		step = (d.X + 3) &^ 3
+		palette = make([]byte, 1024)
+		for i := 0; i < len(m.Palette) && i < 256; i++ {
+			r, g, b, _ := m.Palette[i].RGBA()
+			palette[i*4+0] = uint8(b >> 8)
+			palette[i*4+1] = uint8(g >> 8)
+			palette[i*4+2] = uint8(r >> 8)
+			palette[i*4+3] = 0xFF
+		}
+		h.imageSize = uint32(d.Y * step)
+		h.fileSize += uint32(len(palette)) + h.imageSize
+		h.pixOffset += uint32(len(palette))
+		h.bpp = 8
+	case *image.RGBA:
+		opaque = m.Opaque()
+		if opaque {
+			step = (3*d.X + 3) &^ 3
+			h.bpp = 24
+		} else {
+			step = 4 * d.X
+			h.bpp = 32
+		}
+		h.imageSize = uint32(d.Y * step)
+		h.fileSize += h.imageSize
+	case *image.NRGBA:
+		opaque = m.Opaque()
+		if opaque {
+			step = (3*d.X + 3) &^ 3
+			h.bpp = 24
+		} else {
+			step = 4 * d.X
+			h.bpp = 32
+		}
+		h.imageSize = uint32(d.Y * step)
+		h.fileSize += h.imageSize
+	default:
+		step = (3*d.X + 3) &^ 3
+		h.imageSize = uint32(d.Y * step)
+		h.fileSize += h.imageSize
+		h.bpp = 24
+	}
+
+	if err := binary.Write(w, binary.LittleEndian, h); err != nil {
+		return err
+	}
+	if palette != nil {
+		if err := binary.Write(w, binary.LittleEndian, palette); err != nil {
+			return err
+		}
+	}
+
+	if d.X == 0 || d.Y == 0 {
+		return nil
+	}
+
+	switch m := m.(type) {
+	case *image.Gray:
+		return encodePaletted(w, m.Pix, d.X, d.Y, m.Stride, step)
+	case *image.Paletted:
+		return encodePaletted(w, m.Pix, d.X, d.Y, m.Stride, step)
+	case *image.RGBA:
+		return encodeRGBA(w, m.Pix, d.X, d.Y, m.Stride, step, opaque)
+	case *image.NRGBA:
+		return encodeNRGBA(w, m.Pix, d.X, d.Y, m.Stride, step, opaque)
+	}
+	return encode(w, m, step)
+}

vendor/golang.org/x/image/ccitt/reader.go

@@ -0,0 +1,697 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:generate go run gen.go
+
+// Package ccitt implements a CCITT (fax) image decoder.
+package ccitt
+
+import (
+	"encoding/binary"
+	"errors"
+	"image"
+	"io"
+	"math/bits"
+)
+
+var (
+	errInvalidBounds           = errors.New("ccitt: invalid bounds")
+	errInvalidCode             = errors.New("ccitt: invalid code")
+	errInvalidMode             = errors.New("ccitt: invalid mode")
+	errInvalidOffset           = errors.New("ccitt: invalid offset")
+	errMissingEOL              = errors.New("ccitt: missing End-of-Line")
+	errRunLengthOverflowsWidth = errors.New("ccitt: run length overflows width")
+	errRunLengthTooLong        = errors.New("ccitt: run length too long")
+	errUnsupportedMode         = errors.New("ccitt: unsupported mode")
+	errUnsupportedSubFormat    = errors.New("ccitt: unsupported sub-format")
+	errUnsupportedWidth        = errors.New("ccitt: unsupported width")
+)
+
+// Order specifies the bit ordering in a CCITT data stream.
+type Order uint32
+
+const (
+	// LSB means Least Significant Bits first.
+	LSB Order = iota
+	// MSB means Most Significant Bits first.
+	MSB
+)
+
+// SubFormat represents that the CCITT format consists of a number of
+// sub-formats. Decoding or encoding a CCITT data stream requires knowing the
+// sub-format context. It is not represented in the data stream per se.
+type SubFormat uint32
+
+const (
+	Group3 SubFormat = iota
+	Group4
+)
+
+// Options are optional parameters.
+type Options struct {
+	// Align means that some variable-bit-width codes are byte-aligned.
+	Align bool
+	// Invert means that black is the 1 bit or 0xFF byte, and white is 0.
+	Invert bool
+}
+
+// maxWidth is the maximum (inclusive) supported width. This is a limitation of
+// this implementation, to guard against integer overflow, and not anything
+// inherent to the CCITT format.
+const maxWidth = 1 << 20
+
+func invertBytes(b []byte) {
+	for i, c := range b {
+		b[i] = ^c
+	}
+}
+
+func reverseBitsWithinBytes(b []byte) {
+	for i, c := range b {
+		b[i] = bits.Reverse8(c)
+	}
+}
+
+// highBits writes to dst (1 bit per pixel, most significant bit first) the
+// high (0x80) bits from src (1 byte per pixel). It returns the number of bytes
+// written and read such that dst[:d] is the packed form of src[:s].
+//
+// For example, if src starts with the 8 bytes [0x7D, 0x7E, 0x7F, 0x80, 0x81,
+// 0x82, 0x00, 0xFF] then 0x1D will be written to dst[0].
+//
+// If src has (8 * len(dst)) or more bytes then only len(dst) bytes are
+// written, (8 * len(dst)) bytes are read, and invert is ignored.
+//
+// Otherwise, if len(src) is not a multiple of 8 then the final byte written to
+// dst is padded with 1 bits (if invert is true) or 0 bits. If inverted, the 1s
+// are typically temporary, e.g. they will be flipped back to 0s by an
+// invertBytes call in the highBits caller, reader.Read.
+func highBits(dst []byte, src []byte, invert bool) (d int, s int) {
+	// Pack as many complete groups of 8 src bytes as we can.
+	n := len(src) / 8
+	if n > len(dst) {
+		n = len(dst)
+	}
+	dstN := dst[:n]
+	for i := range dstN {
+		src8 := src[i*8 : i*8+8]
+		dstN[i] = ((src8[0] & 0x80) >> 0) |
+			((src8[1] & 0x80) >> 1) |
+			((src8[2] & 0x80) >> 2) |
+			((src8[3] & 0x80) >> 3) |
+			((src8[4] & 0x80) >> 4) |
+			((src8[5] & 0x80) >> 5) |
+			((src8[6] & 0x80) >> 6) |
+			((src8[7] & 0x80) >> 7)
+	}
+	d, s = n, 8*n
+	dst, src = dst[d:], src[s:]
+
+	// Pack up to 7 remaining src bytes, if there's room in dst.
+	if (len(dst) > 0) && (len(src) > 0) {
+		dstByte := byte(0)
+		if invert {
+			dstByte = 0xFF >> uint(len(src))
+		}
+		for n, srcByte := range src {
+			dstByte |= (srcByte & 0x80) >> uint(n)
+		}
+		dst[0] = dstByte
+		d, s = d+1, s+len(src)
+	}
+	return d, s
+}
+
+type bitReader struct {
+	r io.Reader
+
+	// readErr is the error returned from the most recent r.Read call. As the
+	// io.Reader documentation says, when r.Read returns (n, err), "always
+	// process the n > 0 bytes returned before considering the error err".
+	readErr error
+
+	// order is whether to process r's bytes LSB first or MSB first.
+	order Order
+
+	// The high nBits bits of the bits field hold upcoming bits in MSB order.
+	bits  uint64
+	nBits uint32
+
+	// bytes[br:bw] holds bytes read from r but not yet loaded into bits.
+	br    uint32
+	bw    uint32
+	bytes [1024]uint8
+}
+
+func (b *bitReader) alignToByteBoundary() {
+	n := b.nBits & 7
+	b.bits <<= n
+	b.nBits -= n
+}
+
+// nextBitMaxNBits is the maximum possible value of bitReader.nBits after a
+// bitReader.nextBit call, provided that bitReader.nBits was not more than this
+// value before that call.
+//
+// Note that the decode function can unread bits, which can temporarily set the
+// bitReader.nBits value above nextBitMaxNBits.
+const nextBitMaxNBits = 31
+
+func (b *bitReader) nextBit() (uint64, error) {
+	for {
+		if b.nBits > 0 {
+			bit := b.bits >> 63
+			b.bits <<= 1
+			b.nBits--
+			return bit, nil
+		}
+
+		if available := b.bw - b.br; available >= 4 {
+			// Read 32 bits, even though b.bits is a uint64, since the decode
+			// function may need to unread up to maxCodeLength bits, putting
+			// them back in the remaining (64 - 32) bits. TestMaxCodeLength
+			// checks that the generated maxCodeLength constant fits.
+			//
+			// If changing the Uint32 call, also change nextBitMaxNBits.
+			b.bits = uint64(binary.BigEndian.Uint32(b.bytes[b.br:])) << 32
+			b.br += 4
+			b.nBits = 32
+			continue
+		} else if available > 0 {
+			b.bits = uint64(b.bytes[b.br]) << (7 * 8)
+			b.br++
+			b.nBits = 8
+			continue
+		}
+
+		if b.readErr != nil {
+			return 0, b.readErr
+		}
+
+		n, err := b.r.Read(b.bytes[:])
+		b.br = 0
+		b.bw = uint32(n)
+		b.readErr = err
+
+		if b.order != MSB {
+			reverseBitsWithinBytes(b.bytes[:b.bw])
+		}
+	}
+}
+
+func decode(b *bitReader, decodeTable [][2]int16) (uint32, error) {
+	nBitsRead, bitsRead, state := uint32(0), uint64(0), int32(1)
+	for {
+		bit, err := b.nextBit()
+		if err != nil {
+			return 0, err
+		}
+		bitsRead |= bit << (63 - nBitsRead)
+		nBitsRead++
+		// The "&1" is redundant, but can eliminate a bounds check.
+		state = int32(decodeTable[state][bit&1])
+		if state < 0 {
+			return uint32(^state), nil
+		} else if state == 0 {
+			// Unread the bits we've read, then return errInvalidCode.
+			b.bits = (b.bits >> nBitsRead) | bitsRead
+			b.nBits += nBitsRead
+			return 0, errInvalidCode
+		}
+	}
+}
+
+type reader struct {
+	br        bitReader
+	subFormat SubFormat
+
+	// width is the image width in pixels.
+	width int
+
+	// rowsRemaining starts at the image height in pixels, when the reader is
+	// driven through the io.Reader interface, and decrements to zero as rows
+	// are decoded. When driven through DecodeIntoGray, this field is unused.
+	rowsRemaining int
+
+	// curr and prev hold the current and previous rows. Each element is either
+	// 0x00 (black) or 0xFF (white).
+	//
+	// prev may be nil, when processing the first row.
+	curr []byte
+	prev []byte
+
+	// ri is the read index. curr[:ri] are those bytes of curr that have been
+	// passed along via the Read method.
+	//
+	// When the reader is driven through DecodeIntoGray, instead of through the
+	// io.Reader interface, this field is unused.
+	ri int
+
+	// wi is the write index. curr[:wi] are those bytes of curr that have
+	// already been decoded via the decodeRow method.
+	//
+	// What this implementation calls wi is roughly equivalent to what the spec
+	// calls the a0 index.
+	wi int
+
+	// These fields are copied from the *Options (which may be nil).
+	align  bool
+	invert bool
+
+	// atStartOfRow is whether we have just started the row. Some parts of the
+	// spec say to treat this situation as if "wi = -1".
+	atStartOfRow bool
+
+	// penColorIsWhite is whether the next run is black or white.
+	penColorIsWhite bool
+
+	// seenStartOfImage is whether we've called the startDecode method.
+	seenStartOfImage bool
+
+	// readErr is a sticky error for the Read method.
+	readErr error
+}
+
+func (z *reader) Read(p []byte) (int, error) {
+	if z.readErr != nil {
+		return 0, z.readErr
+	}
+	originalP := p
+
+	for len(p) > 0 {
+		// Allocate buffers (and decode any start-of-image codes), if
+		// processing the first or second row.
+		if z.curr == nil {
+			if !z.seenStartOfImage {
+				if z.readErr = z.startDecode(); z.readErr != nil {
+					break
+				}
+				z.atStartOfRow = true
+			}
+			z.curr = make([]byte, z.width)
+		}
+
+		// Decode the next row, if necessary.
+		if z.atStartOfRow {
+			if z.rowsRemaining <= 0 {
+				if z.readErr = z.finishDecode(); z.readErr != nil {
+					break
+				}
+				z.readErr = io.EOF
+				break
+			}
+			if z.readErr = z.decodeRow(); z.readErr != nil {
+				break
+			}
+			z.rowsRemaining--
+		}
+
+		// Pack from z.curr (1 byte per pixel) to p (1 bit per pixel).
+		packD, packS := highBits(p, z.curr[z.ri:], z.invert)
+		p = p[packD:]
+		z.ri += packS
+
+		// Prepare to decode the next row, if necessary.
+		if z.ri == len(z.curr) {
+			z.ri, z.curr, z.prev = 0, z.prev, z.curr
+			z.atStartOfRow = true
+		}
+	}
+
+	n := len(originalP) - len(p)
+	if z.invert {
+		invertBytes(originalP[:n])
+	}
+	return n, z.readErr
+}
+
+func (z *reader) penColor() byte {
+	if z.penColorIsWhite {
+		return 0xFF
+	}
+	return 0x00
+}
+
+func (z *reader) startDecode() error {
+	switch z.subFormat {
+	case Group3:
+		if err := z.decodeEOL(); err != nil {
+			return err
+		}
+
+	case Group4:
+		// No-op.
+
+	default:
+		return errUnsupportedSubFormat
+	}
+
+	z.seenStartOfImage = true
+	return nil
+}
+
+func (z *reader) finishDecode() error {
+	numberOfEOLs := 0
+	switch z.subFormat {
+	case Group3:
+		// The stream ends with a RTC (Return To Control) of 6 consecutive
+		// EOL's, but we should have already just seen an EOL, either in
+		// z.startDecode (for a zero-height image) or in z.decodeRow.
+		numberOfEOLs = 5
+
+	case Group4:
+		// The stream ends with two EOL's, the first of which is possibly
+		// byte-aligned.
+		numberOfEOLs = 2
+		if err := z.decodeEOL(); err == nil {
+			numberOfEOLs--
+		} else if err == errInvalidCode {
+			// Try again, this time starting from a byte boundary.
+			z.br.alignToByteBoundary()
+		} else {
+			return err
+		}
+
+	default:
+		return errUnsupportedSubFormat
+	}
+
+	for ; numberOfEOLs > 0; numberOfEOLs-- {
+		if err := z.decodeEOL(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (z *reader) decodeEOL() error {
+	// TODO: EOL doesn't have to be in the modeDecodeTable. It could be in its
+	// own table, or we could just hard-code it, especially if we might need to
+	// cater for optional byte-alignment, or an arbitrary number (potentially
+	// more than 8) of 0-valued padding bits.
+	if mode, err := decode(&z.br, modeDecodeTable[:]); err != nil {
+		return err
+	} else if mode != modeEOL {
+		return errMissingEOL
+	}
+	return nil
+}
+
+func (z *reader) decodeRow() error {
+	z.wi = 0
+	z.atStartOfRow = true
+	z.penColorIsWhite = true
+
+	if z.align {
+		z.br.alignToByteBoundary()
+	}
+
+	switch z.subFormat {
+	case Group3:
+		for ; z.wi < len(z.curr); z.atStartOfRow = false {
+			if err := z.decodeRun(); err != nil {
+				return err
+			}
+		}
+		return z.decodeEOL()
+
+	case Group4:
+		for ; z.wi < len(z.curr); z.atStartOfRow = false {
+			mode, err := decode(&z.br, modeDecodeTable[:])
+			if err != nil {
+				return err
+			}
+			rm := readerMode{}
+			if mode < uint32(len(readerModes)) {
+				rm = readerModes[mode]
+			}
+			if rm.function == nil {
+				return errInvalidMode
+			}
+			if err := rm.function(z, rm.arg); err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+
+	return errUnsupportedSubFormat
+}
+
+func (z *reader) decodeRun() error {
+	table := blackDecodeTable[:]
+	if z.penColorIsWhite {
+		table = whiteDecodeTable[:]
+	}
+
+	total := 0
+	for {
+		n, err := decode(&z.br, table)
+		if err != nil {
+			return err
+		}
+		if n > maxWidth {
+			panic("unreachable")
+		}
+		total += int(n)
+		if total > maxWidth {
+			return errRunLengthTooLong
+		}
+		// Anything 0x3F or below is a terminal code.
+		if n <= 0x3F {
+			break
+		}
+	}
+
+	if total > (len(z.curr) - z.wi) {
+		return errRunLengthOverflowsWidth
+	}
+	dst := z.curr[z.wi : z.wi+total]
+	penColor := z.penColor()
+	for i := range dst {
+		dst[i] = penColor
+	}
+	z.wi += total
+	z.penColorIsWhite = !z.penColorIsWhite
+
+	return nil
+}
+
+// The various modes' semantics are based on determining a row of pixels'
+// "changing elements": those pixels whose color differs from the one on its
+// immediate left.
+//
+// The row above the first row is implicitly all white. Similarly, the column
+// to the left of the first column is implicitly all white.
+//
+// For example, here's Figure 1 in "ITU-T Recommendation T.6", where the
+// current and previous rows contain black (B) and white (w) pixels. The a?
+// indexes point into curr, the b? indexes point into prev.
+//
+//                 b1 b2
+//                 v  v
+// prev: BBBBBwwwwwBBBwwwww
+// curr: BBBwwwwwBBBBBBwwww
+//          ^    ^     ^
+//          a0   a1    a2
+//
+// a0 is the "reference element" or current decoder position, roughly
+// equivalent to what this implementation calls reader.wi.
+//
+// a1 is the next changing element to the right of a0, on the "coding line"
+// (the current row).
+//
+// a2 is the next changing element to the right of a1, again on curr.
+//
+// b1 is the first changing element on the "reference line" (the previous row)
+// to the right of a0 and of opposite color to a0.
+//
+// b2 is the next changing element to the right of b1, again on prev.
+//
+// The various modes calculate a1 (and a2, for modeH):
+//  - modePass calculates that a1 is at or to the right of b2.
+//  - modeH    calculates a1 and a2 without considering b1 or b2.
+//  - modeV*   calculates a1 to be b1 plus an adjustment (between -3 and +3).
+
+const (
+	findB1 = false
+	findB2 = true
+)
+
+// findB finds either the b1 or b2 value.
+func (z *reader) findB(whichB bool) int {
+	// The initial row is a special case. The previous row is implicitly all
+	// white, so that there are no changing pixel elements. We return b1 or b2
+	// to be at the end of the row.
+	if len(z.prev) != len(z.curr) {
+		return len(z.curr)
+	}
+
+	i := z.wi
+
+	if z.atStartOfRow {
+		// a0 is implicitly at -1, on a white pixel. b1 is the first black
+		// pixel in the previous row. b2 is the first white pixel after that.
+		for ; (i < len(z.prev)) && (z.prev[i] == 0xFF); i++ {
+		}
+		if whichB == findB2 {
+			for ; (i < len(z.prev)) && (z.prev[i] == 0x00); i++ {
+			}
+		}
+		return i
+	}
+
+	// As per figure 1 above, assume that the current pen color is white.
+	// First, walk past every contiguous black pixel in prev, starting at a0.
+	oppositeColor := ^z.penColor()
+	for ; (i < len(z.prev)) && (z.prev[i] == oppositeColor); i++ {
+	}
+
+	// Then walk past every contiguous white pixel.
+	penColor := ^oppositeColor
+	for ; (i < len(z.prev)) && (z.prev[i] == penColor); i++ {
+	}
+
+	// We're now at a black pixel (or at the end of the row). That's b1.
+	if whichB == findB2 {
+		// If we're looking for b2, walk past every contiguous black pixel
+		// again.
+		oppositeColor := ^penColor
+		for ; (i < len(z.prev)) && (z.prev[i] == oppositeColor); i++ {
+		}
+	}
+
+	return i
+}
+
+type readerMode struct {
+	function func(z *reader, arg int) error
+	arg      int
+}
+
+var readerModes = [...]readerMode{
+	modePass: {function: readerModePass},
+	modeH:    {function: readerModeH},
+	modeV0:   {function: readerModeV, arg: +0},
+	modeVR1:  {function: readerModeV, arg: +1},
+	modeVR2:  {function: readerModeV, arg: +2},
+	modeVR3:  {function: readerModeV, arg: +3},
+	modeVL1:  {function: readerModeV, arg: -1},
+	modeVL2:  {function: readerModeV, arg: -2},
+	modeVL3:  {function: readerModeV, arg: -3},
+	modeExt:  {function: readerModeExt},
+}
+
+func readerModePass(z *reader, arg int) error {
+	b2 := z.findB(findB2)
+	if (b2 < z.wi) || (len(z.curr) < b2) {
+		return errInvalidOffset
+	}
+	dst := z.curr[z.wi:b2]
+	penColor := z.penColor()
+	for i := range dst {
+		dst[i] = penColor
+	}
+	z.wi = b2
+	return nil
+}
+
+func readerModeH(z *reader, arg int) error {
+	// The first iteration finds a1. The second finds a2.
+	for i := 0; i < 2; i++ {
+		if err := z.decodeRun(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func readerModeV(z *reader, arg int) error {
+	a1 := z.findB(findB1) + arg
+	if (a1 < z.wi) || (len(z.curr) < a1) {
+		return errInvalidOffset
+	}
+	dst := z.curr[z.wi:a1]
+	penColor := z.penColor()
+	for i := range dst {
+		dst[i] = penColor
+	}
+	z.wi = a1
+	z.penColorIsWhite = !z.penColorIsWhite
+	return nil
+}
+
+func readerModeExt(z *reader, arg int) error {
+	return errUnsupportedMode
+}
+
+// DecodeIntoGray decodes the CCITT-formatted data in r into dst.
+//
+// It returns an error if dst's width and height don't match the implied width
+// and height of CCITT-formatted data.
+func DecodeIntoGray(dst *image.Gray, r io.Reader, order Order, sf SubFormat, opts *Options) error {
+	bounds := dst.Bounds()
+	if (bounds.Dx() < 0) || (bounds.Dy() < 0) {
+		return errInvalidBounds
+	}
+	if bounds.Dx() > maxWidth {
+		return errUnsupportedWidth
+	}
+
+	z := reader{
+		br:        bitReader{r: r, order: order},
+		subFormat: sf,
+		align:     (opts != nil) && opts.Align,
+		invert:    (opts != nil) && opts.Invert,
+		width:     bounds.Dx(),
+	}
+	if err := z.startDecode(); err != nil {
+		return err
+	}
+
+	width := bounds.Dx()
+	for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
+		p := (y - bounds.Min.Y) * dst.Stride
+		z.curr = dst.Pix[p : p+width]
+		if err := z.decodeRow(); err != nil {
+			return err
+		}
+		z.curr, z.prev = nil, z.curr
+	}
+
+	if err := z.finishDecode(); err != nil {
+		return err
+	}
+
+	if z.invert {
+		for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
+			p := (y - bounds.Min.Y) * dst.Stride
+			invertBytes(dst.Pix[p : p+width])
+		}
+	}
+
+	return nil
+}
+
+// NewReader returns an io.Reader that decodes the CCITT-formatted data in r.
+// The resultant byte stream is one bit per pixel (MSB first), with 1 meaning
+// white and 0 meaning black. Each row in the result is byte-aligned.
+func NewReader(r io.Reader, order Order, sf SubFormat, width int, height int, opts *Options) io.Reader {
+	readErr := error(nil)
+	if (width < 0) || (height < 0) {
+		readErr = errInvalidBounds
+	} else if width > maxWidth {
+		readErr = errUnsupportedWidth
+	}
+
+	return &reader{
+		br:            bitReader{r: r, order: order},
+		subFormat:     sf,
+		align:         (opts != nil) && opts.Align,
+		invert:        (opts != nil) && opts.Invert,
+		width:         width,
+		rowsRemaining: height,
+		readErr:       readErr,
+	}
+}

vendor/golang.org/x/image/ccitt/table.go

@@ -0,0 +1,989 @@
+// generated by "go run gen.go". DO NOT EDIT.
+
+package ccitt
+
+// Each decodeTable is represented by an array of [2]int16's: a binary tree.
+// Each array element (other than element 0, which means invalid) is a branch
+// node in that tree. The root node is always element 1 (the second element).
+//
+// To walk the tree, look at the next bit in the bit stream, using it to select
+// the first or second element of the [2]int16. If that int16 is 0, we have an
+// invalid code. If it is positive, go to that branch node. If it is negative,
+// then we have a leaf node, whose value is the bitwise complement (the ^
+// operator) of that int16.
+//
+// Comments above each decodeTable also show the same structure visually. The
+// "b123" lines show the 123'rd branch node. The "=XXXXX" lines show an invalid
+// code. The "=v1234" lines show a leaf node with value 1234. When reading the
+// bit stream, a 0 or 1 bit means to go up or down, as you move left to right.
+//
+// For example, in modeDecodeTable, branch node b005 is three steps up from the
+// root node, meaning that we have already seen "000". If the next bit is "0"
+// then we move to branch node b006. Otherwise, the next bit is "1", and we
+// move to the leaf node v0000 (also known as the modePass constant). Indeed,
+// the bits that encode modePass are "0001".
+//
+// Tables 1, 2 and 3 come from the "ITU-T Recommendation T.6: FACSIMILE CODING
+// SCHEMES AND CODING CONTROL FUNCTIONS FOR GROUP 4 FACSIMILE APPARATUS"
+// specification:
+//
+// https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-T.6-198811-I!!PDF-E&type=items
+
+// modeDecodeTable represents Table 1 and the End-of-Line code.
+//
+//                              +=XXXXX
+// b015                       +-+
+//                            | +=v0010
+// b014                     +-+
+//                          | +=XXXXX
+// b013                   +-+
+//                        | +=XXXXX
+// b012                 +-+
+//                      | +=XXXXX
+// b011               +-+
+//                    | +=XXXXX
+// b009             +-+
+//                  | +=v0009
+// b007           +-+
+//                | | +=v0008
+// b010           | +-+
+//                |   +=v0005
+// b006         +-+
+//              | | +=v0007
+// b008         | +-+
+//              |   +=v0004
+// b005       +-+
+//            | +=v0000
+// b003     +-+
+//          | +=v0001
+// b002   +-+
+//        | | +=v0006
+// b004   | +-+
+//        |   +=v0003
+// b001 +-+
+//        +=v0002
+var modeDecodeTable = [...][2]int16{
+	0:  {0, 0},
+	1:  {2, ^2},
+	2:  {3, 4},
+	3:  {5, ^1},
+	4:  {^6, ^3},
+	5:  {6, ^0},
+	6:  {7, 8},
+	7:  {9, 10},
+	8:  {^7, ^4},
+	9:  {11, ^9},
+	10: {^8, ^5},
+	11: {12, 0},
+	12: {13, 0},
+	13: {14, 0},
+	14: {15, 0},
+	15: {0, ^10},
+}
+
+// whiteDecodeTable represents Tables 2 and 3 for a white run.
+//
+//                      +=XXXXX
+// b059               +-+
+//                    | |     +=v1792
+// b096               | |   +-+
+//                    | |   | | +=v1984
+// b100               | |   | +-+
+//                    | |   |   +=v2048
+// b094               | | +-+
+//                    | | | |   +=v2112
+// b101               | | | | +-+
+//                    | | | | | +=v2176
+// b097               | | | +-+
+//                    | | |   | +=v2240
+// b102               | | |   +-+
+//                    | | |     +=v2304
+// b085               | +-+
+//                    |   |   +=v1856
+// b098               |   | +-+
+//                    |   | | +=v1920
+// b095               |   +-+
+//                    |     |   +=v2368
+// b103               |     | +-+
+//                    |     | | +=v2432
+// b099               |     +-+
+//                    |       | +=v2496
+// b104               |       +-+
+//                    |         +=v2560
+// b040             +-+
+//                  | | +=v0029
+// b060             | +-+
+//                  |   +=v0030
+// b026           +-+
+//                | |   +=v0045
+// b061           | | +-+
+//                | | | +=v0046
+// b041           | +-+
+//                |   +=v0022
+// b016         +-+
+//              | |   +=v0023
+// b042         | | +-+
+//              | | | | +=v0047
+// b062         | | | +-+
+//              | | |   +=v0048
+// b027         | +-+
+//              |   +=v0013
+// b008       +-+
+//            | |     +=v0020
+// b043       | |   +-+
+//            | |   | | +=v0033
+// b063       | |   | +-+
+//            | |   |   +=v0034
+// b028       | | +-+
+//            | | | |   +=v0035
+// b064       | | | | +-+
+//            | | | | | +=v0036
+// b044       | | | +-+
+//            | | |   | +=v0037
+// b065       | | |   +-+
+//            | | |     +=v0038
+// b017       | +-+
+//            |   |   +=v0019
+// b045       |   | +-+
+//            |   | | | +=v0031
+// b066       |   | | +-+
+//            |   | |   +=v0032
+// b029       |   +-+
+//            |     +=v0001
+// b004     +-+
+//          | |     +=v0012
+// b030     | |   +-+
+//          | |   | |   +=v0053
+// b067     | |   | | +-+
+//          | |   | | | +=v0054
+// b046     | |   | +-+
+//          | |   |   +=v0026
+// b018     | | +-+
+//          | | | |     +=v0039
+// b068     | | | |   +-+
+//          | | | |   | +=v0040
+// b047     | | | | +-+
+//          | | | | | | +=v0041
+// b069     | | | | | +-+
+//          | | | | |   +=v0042
+// b031     | | | +-+
+//          | | |   |   +=v0043
+// b070     | | |   | +-+
+//          | | |   | | +=v0044
+// b048     | | |   +-+
+//          | | |     +=v0021
+// b009     | +-+
+//          |   |     +=v0028
+// b049     |   |   +-+
+//          |   |   | | +=v0061
+// b071     |   |   | +-+
+//          |   |   |   +=v0062
+// b032     |   | +-+
+//          |   | | |   +=v0063
+// b072     |   | | | +-+
+//          |   | | | | +=v0000
+// b050     |   | | +-+
+//          |   | |   | +=v0320
+// b073     |   | |   +-+
+//          |   | |     +=v0384
+// b019     |   +-+
+//          |     +=v0010
+// b002   +-+
+//        | |     +=v0011
+// b020   | |   +-+
+//        | |   | |   +=v0027
+// b051   | |   | | +-+
+//        | |   | | | | +=v0059
+// b074   | |   | | | +-+
+//        | |   | | |   +=v0060
+// b033   | |   | +-+
+//        | |   |   |     +=v1472
+// b086   | |   |   |   +-+
+//        | |   |   |   | +=v1536
+// b075   | |   |   | +-+
+//        | |   |   | | | +=v1600
+// b087   | |   |   | | +-+
+//        | |   |   | |   +=v1728
+// b052   | |   |   +-+
+//        | |   |     +=v0018
+// b010   | | +-+
+//        | | | |     +=v0024
+// b053   | | | |   +-+
+//        | | | |   | | +=v0049
+// b076   | | | |   | +-+
+//        | | | |   |   +=v0050
+// b034   | | | | +-+
+//        | | | | | |   +=v0051
+// b077   | | | | | | +-+
+//        | | | | | | | +=v0052
+// b054   | | | | | +-+
+//        | | | | |   +=v0025
+// b021   | | | +-+
+//        | | |   |     +=v0055
+// b078   | | |   |   +-+
+//        | | |   |   | +=v0056
+// b055   | | |   | +-+
+//        | | |   | | | +=v0057
+// b079   | | |   | | +-+
+//        | | |   | |   +=v0058
+// b035   | | |   +-+
+//        | | |     +=v0192
+// b005   | +-+
+//        |   |     +=v1664
+// b036   |   |   +-+
+//        |   |   | |   +=v0448
+// b080   |   |   | | +-+
+//        |   |   | | | +=v0512
+// b056   |   |   | +-+
+//        |   |   |   |   +=v0704
+// b088   |   |   |   | +-+
+//        |   |   |   | | +=v0768
+// b081   |   |   |   +-+
+//        |   |   |     +=v0640
+// b022   |   | +-+
+//        |   | | |     +=v0576
+// b082   |   | | |   +-+
+//        |   | | |   | | +=v0832
+// b089   |   | | |   | +-+
+//        |   | | |   |   +=v0896
+// b057   |   | | | +-+
+//        |   | | | | |   +=v0960
+// b090   |   | | | | | +-+
+//        |   | | | | | | +=v1024
+// b083   |   | | | | +-+
+//        |   | | | |   | +=v1088
+// b091   |   | | | |   +-+
+//        |   | | | |     +=v1152
+// b037   |   | | +-+
+//        |   | |   |     +=v1216
+// b092   |   | |   |   +-+
+//        |   | |   |   | +=v1280
+// b084   |   | |   | +-+
+//        |   | |   | | | +=v1344
+// b093   |   | |   | | +-+
+//        |   | |   | |   +=v1408
+// b058   |   | |   +-+
+//        |   | |     +=v0256
+// b011   |   +-+
+//        |     +=v0002
+// b001 +-+
+//        |     +=v0003
+// b012   |   +-+
+//        |   | | +=v0128
+// b023   |   | +-+
+//        |   |   +=v0008
+// b006   | +-+
+//        | | |   +=v0009
+// b024   | | | +-+
+//        | | | | | +=v0016
+// b038   | | | | +-+
+//        | | | |   +=v0017
+// b013   | | +-+
+//        | |   +=v0004
+// b003   +-+
+//          |   +=v0005
+// b014     | +-+
+//          | | |   +=v0014
+// b039     | | | +-+
+//          | | | | +=v0015
+// b025     | | +-+
+//          | |   +=v0064
+// b007     +-+
+//            | +=v0006
+// b015       +-+
+//              +=v0007
+var whiteDecodeTable = [...][2]int16{
+	0:   {0, 0},
+	1:   {2, 3},
+	2:   {4, 5},
+	3:   {6, 7},
+	4:   {8, 9},
+	5:   {10, 11},
+	6:   {12, 13},
+	7:   {14, 15},
+	8:   {16, 17},
+	9:   {18, 19},
+	10:  {20, 21},
+	11:  {22, ^2},
+	12:  {^3, 23},
+	13:  {24, ^4},
+	14:  {^5, 25},
+	15:  {^6, ^7},
+	16:  {26, 27},
+	17:  {28, 29},
+	18:  {30, 31},
+	19:  {32, ^10},
+	20:  {^11, 33},
+	21:  {34, 35},
+	22:  {36, 37},
+	23:  {^128, ^8},
+	24:  {^9, 38},
+	25:  {39, ^64},
+	26:  {40, 41},
+	27:  {42, ^13},
+	28:  {43, 44},
+	29:  {45, ^1},
+	30:  {^12, 46},
+	31:  {47, 48},
+	32:  {49, 50},
+	33:  {51, 52},
+	34:  {53, 54},
+	35:  {55, ^192},
+	36:  {^1664, 56},
+	37:  {57, 58},
+	38:  {^16, ^17},
+	39:  {^14, ^15},
+	40:  {59, 60},
+	41:  {61, ^22},
+	42:  {^23, 62},
+	43:  {^20, 63},
+	44:  {64, 65},
+	45:  {^19, 66},
+	46:  {67, ^26},
+	47:  {68, 69},
+	48:  {70, ^21},
+	49:  {^28, 71},
+	50:  {72, 73},
+	51:  {^27, 74},
+	52:  {75, ^18},
+	53:  {^24, 76},
+	54:  {77, ^25},
+	55:  {78, 79},
+	56:  {80, 81},
+	57:  {82, 83},
+	58:  {84, ^256},
+	59:  {0, 85},
+	60:  {^29, ^30},
+	61:  {^45, ^46},
+	62:  {^47, ^48},
+	63:  {^33, ^34},
+	64:  {^35, ^36},
+	65:  {^37, ^38},
+	66:  {^31, ^32},
+	67:  {^53, ^54},
+	68:  {^39, ^40},
+	69:  {^41, ^42},
+	70:  {^43, ^44},
+	71:  {^61, ^62},
+	72:  {^63, ^0},
+	73:  {^320, ^384},
+	74:  {^59, ^60},
+	75:  {86, 87},
+	76:  {^49, ^50},
+	77:  {^51, ^52},
+	78:  {^55, ^56},
+	79:  {^57, ^58},
+	80:  {^448, ^512},
+	81:  {88, ^640},
+	82:  {^576, 89},
+	83:  {90, 91},
+	84:  {92, 93},
+	85:  {94, 95},
+	86:  {^1472, ^1536},
+	87:  {^1600, ^1728},
+	88:  {^704, ^768},
+	89:  {^832, ^896},
+	90:  {^960, ^1024},
+	91:  {^1088, ^1152},
+	92:  {^1216, ^1280},
+	93:  {^1344, ^1408},
+	94:  {96, 97},
+	95:  {98, 99},
+	96:  {^1792, 100},
+	97:  {101, 102},
+	98:  {^1856, ^1920},
+	99:  {103, 104},
+	100: {^1984, ^2048},
+	101: {^2112, ^2176},
+	102: {^2240, ^2304},
+	103: {^2368, ^2432},
+	104: {^2496, ^2560},
+}
+
+// blackDecodeTable represents Tables 2 and 3 for a black run.
+//
+//                      +=XXXXX
+// b017               +-+
+//                    | |     +=v1792
+// b042               | |   +-+
+//                    | |   | | +=v1984
+// b063               | |   | +-+
+//                    | |   |   +=v2048
+// b029               | | +-+
+//                    | | | |   +=v2112
+// b064               | | | | +-+
+//                    | | | | | +=v2176
+// b043               | | | +-+
+//                    | | |   | +=v2240
+// b065               | | |   +-+
+//                    | | |     +=v2304
+// b022               | +-+
+//                    |   |   +=v1856
+// b044               |   | +-+
+//                    |   | | +=v1920
+// b030               |   +-+
+//                    |     |   +=v2368
+// b066               |     | +-+
+//                    |     | | +=v2432
+// b045               |     +-+
+//                    |       | +=v2496
+// b067               |       +-+
+//                    |         +=v2560
+// b013             +-+
+//                  | |     +=v0018
+// b031             | |   +-+
+//                  | |   | |   +=v0052
+// b068             | |   | | +-+
+//                  | |   | | | | +=v0640
+// b095             | |   | | | +-+
+//                  | |   | | |   +=v0704
+// b046             | |   | +-+
+//                  | |   |   |   +=v0768
+// b096             | |   |   | +-+
+//                  | |   |   | | +=v0832
+// b069             | |   |   +-+
+//                  | |   |     +=v0055
+// b023             | | +-+
+//                  | | | |     +=v0056
+// b070             | | | |   +-+
+//                  | | | |   | | +=v1280
+// b097             | | | |   | +-+
+//                  | | | |   |   +=v1344
+// b047             | | | | +-+
+//                  | | | | | |   +=v1408
+// b098             | | | | | | +-+
+//                  | | | | | | | +=v1472
+// b071             | | | | | +-+
+//                  | | | | |   +=v0059
+// b032             | | | +-+
+//                  | | |   |   +=v0060
+// b072             | | |   | +-+
+//                  | | |   | | | +=v1536
+// b099             | | |   | | +-+
+//                  | | |   | |   +=v1600
+// b048             | | |   +-+
+//                  | | |     +=v0024
+// b018             | +-+
+//                  |   |     +=v0025
+// b049             |   |   +-+
+//                  |   |   | |   +=v1664
+// b100             |   |   | | +-+
+//                  |   |   | | | +=v1728
+// b073             |   |   | +-+
+//                  |   |   |   +=v0320
+// b033             |   | +-+
+//                  |   | | |   +=v0384
+// b074             |   | | | +-+
+//                  |   | | | | +=v0448
+// b050             |   | | +-+
+//                  |   | |   |   +=v0512
+// b101             |   | |   | +-+
+//                  |   | |   | | +=v0576
+// b075             |   | |   +-+
+//                  |   | |     +=v0053
+// b024             |   +-+
+//                  |     |     +=v0054
+// b076             |     |   +-+
+//                  |     |   | | +=v0896
+// b102             |     |   | +-+
+//                  |     |   |   +=v0960
+// b051             |     | +-+
+//                  |     | | |   +=v1024
+// b103             |     | | | +-+
+//                  |     | | | | +=v1088
+// b077             |     | | +-+
+//                  |     | |   | +=v1152
+// b104             |     | |   +-+
+//                  |     | |     +=v1216
+// b034             |     +-+
+//                  |       +=v0064
+// b010           +-+
+//                | |   +=v0013
+// b019           | | +-+
+//                | | | |     +=v0023
+// b052           | | | |   +-+
+//                | | | |   | | +=v0050
+// b078           | | | |   | +-+
+//                | | | |   |   +=v0051
+// b035           | | | | +-+
+//                | | | | | |   +=v0044
+// b079           | | | | | | +-+
+//                | | | | | | | +=v0045
+// b053           | | | | | +-+
+//                | | | | |   | +=v0046
+// b080           | | | | |   +-+
+//                | | | | |     +=v0047
+// b025           | | | +-+
+//                | | |   |     +=v0057
+// b081           | | |   |   +-+
+//                | | |   |   | +=v0058
+// b054           | | |   | +-+
+//                | | |   | | | +=v0061
+// b082           | | |   | | +-+
+//                | | |   | |   +=v0256
+// b036           | | |   +-+
+//                | | |     +=v0016
+// b014           | +-+
+//                |   |     +=v0017
+// b037           |   |   +-+
+//                |   |   | |   +=v0048
+// b083           |   |   | | +-+
+//                |   |   | | | +=v0049
+// b055           |   |   | +-+
+//                |   |   |   | +=v0062
+// b084           |   |   |   +-+
+//                |   |   |     +=v0063
+// b026           |   | +-+
+//                |   | | |     +=v0030
+// b085           |   | | |   +-+
+//                |   | | |   | +=v0031
+// b056           |   | | | +-+
+//                |   | | | | | +=v0032
+// b086           |   | | | | +-+
+//                |   | | | |   +=v0033
+// b038           |   | | +-+
+//                |   | |   |   +=v0040
+// b087           |   | |   | +-+
+//                |   | |   | | +=v0041
+// b057           |   | |   +-+
+//                |   | |     +=v0022
+// b020           |   +-+
+//                |     +=v0014
+// b008         +-+
+//              | |   +=v0010
+// b015         | | +-+
+//              | | | +=v0011
+// b011         | +-+
+//              |   |     +=v0015
+// b027         |   |   +-+
+//              |   |   | |     +=v0128
+// b088         |   |   | |   +-+
+//              |   |   | |   | +=v0192
+// b058         |   |   | | +-+
+//              |   |   | | | | +=v0026
+// b089         |   |   | | | +-+
+//              |   |   | | |   +=v0027
+// b039         |   |   | +-+
+//              |   |   |   |   +=v0028
+// b090         |   |   |   | +-+
+//              |   |   |   | | +=v0029
+// b059         |   |   |   +-+
+//              |   |   |     +=v0019
+// b021         |   | +-+
+//              |   | | |     +=v0020
+// b060         |   | | |   +-+
+//              |   | | |   | | +=v0034
+// b091         |   | | |   | +-+
+//              |   | | |   |   +=v0035
+// b040         |   | | | +-+
+//              |   | | | | |   +=v0036
+// b092         |   | | | | | +-+
+//              |   | | | | | | +=v0037
+// b061         |   | | | | +-+
+//              |   | | | |   | +=v0038
+// b093         |   | | | |   +-+
+//              |   | | | |     +=v0039
+// b028         |   | | +-+
+//              |   | |   |   +=v0021
+// b062         |   | |   | +-+
+//              |   | |   | | | +=v0042
+// b094         |   | |   | | +-+
+//              |   | |   | |   +=v0043
+// b041         |   | |   +-+
+//              |   | |     +=v0000
+// b016         |   +-+
+//              |     +=v0012
+// b006       +-+
+//            | |   +=v0009
+// b012       | | +-+
+//            | | | +=v0008
+// b009       | +-+
+//            |   +=v0007
+// b004     +-+
+//          | | +=v0006
+// b007     | +-+
+//          |   +=v0005
+// b002   +-+
+//        | | +=v0001
+// b005   | +-+
+//        |   +=v0004
+// b001 +-+
+//        | +=v0003
+// b003   +-+
+//          +=v0002
+var blackDecodeTable = [...][2]int16{
+	0:   {0, 0},
+	1:   {2, 3},
+	2:   {4, 5},
+	3:   {^3, ^2},
+	4:   {6, 7},
+	5:   {^1, ^4},
+	6:   {8, 9},
+	7:   {^6, ^5},
+	8:   {10, 11},
+	9:   {12, ^7},
+	10:  {13, 14},
+	11:  {15, 16},
+	12:  {^9, ^8},
+	13:  {17, 18},
+	14:  {19, 20},
+	15:  {^10, ^11},
+	16:  {21, ^12},
+	17:  {0, 22},
+	18:  {23, 24},
+	19:  {^13, 25},
+	20:  {26, ^14},
+	21:  {27, 28},
+	22:  {29, 30},
+	23:  {31, 32},
+	24:  {33, 34},
+	25:  {35, 36},
+	26:  {37, 38},
+	27:  {^15, 39},
+	28:  {40, 41},
+	29:  {42, 43},
+	30:  {44, 45},
+	31:  {^18, 46},
+	32:  {47, 48},
+	33:  {49, 50},
+	34:  {51, ^64},
+	35:  {52, 53},
+	36:  {54, ^16},
+	37:  {^17, 55},
+	38:  {56, 57},
+	39:  {58, 59},
+	40:  {60, 61},
+	41:  {62, ^0},
+	42:  {^1792, 63},
+	43:  {64, 65},
+	44:  {^1856, ^1920},
+	45:  {66, 67},
+	46:  {68, 69},
+	47:  {70, 71},
+	48:  {72, ^24},
+	49:  {^25, 73},
+	50:  {74, 75},
+	51:  {76, 77},
+	52:  {^23, 78},
+	53:  {79, 80},
+	54:  {81, 82},
+	55:  {83, 84},
+	56:  {85, 86},
+	57:  {87, ^22},
+	58:  {88, 89},
+	59:  {90, ^19},
+	60:  {^20, 91},
+	61:  {92, 93},
+	62:  {^21, 94},
+	63:  {^1984, ^2048},
+	64:  {^2112, ^2176},
+	65:  {^2240, ^2304},
+	66:  {^2368, ^2432},
+	67:  {^2496, ^2560},
+	68:  {^52, 95},
+	69:  {96, ^55},
+	70:  {^56, 97},
+	71:  {98, ^59},
+	72:  {^60, 99},
+	73:  {100, ^320},
+	74:  {^384, ^448},
+	75:  {101, ^53},
+	76:  {^54, 102},
+	77:  {103, 104},
+	78:  {^50, ^51},
+	79:  {^44, ^45},
+	80:  {^46, ^47},
+	81:  {^57, ^58},
+	82:  {^61, ^256},
+	83:  {^48, ^49},
+	84:  {^62, ^63},
+	85:  {^30, ^31},
+	86:  {^32, ^33},
+	87:  {^40, ^41},
+	88:  {^128, ^192},
+	89:  {^26, ^27},
+	90:  {^28, ^29},
+	91:  {^34, ^35},
+	92:  {^36, ^37},
+	93:  {^38, ^39},
+	94:  {^42, ^43},
+	95:  {^640, ^704},
+	96:  {^768, ^832},
+	97:  {^1280, ^1344},
+	98:  {^1408, ^1472},
+	99:  {^1536, ^1600},
+	100: {^1664, ^1728},
+	101: {^512, ^576},
+	102: {^896, ^960},
+	103: {^1024, ^1088},
+	104: {^1152, ^1216},
+}
+
+const maxCodeLength = 13
+
+// Each encodeTable is represented by an array of bitStrings.
+
+// bitString is a pair of uint32 values representing a bit code.
+// The nBits low bits of bits make up the actual bit code.
+// Eg. bitString{0x0004, 8} represents the bitcode "00000100".
+type bitString struct {
+	bits  uint32
+	nBits uint32
+}
+
+// modeEncodeTable represents Table 1 and the End-of-Line code.
+var modeEncodeTable = [...]bitString{
+	0:  {0x0001, 4},  // "0001"
+	1:  {0x0001, 3},  // "001"
+	2:  {0x0001, 1},  // "1"
+	3:  {0x0003, 3},  // "011"
+	4:  {0x0003, 6},  // "000011"
+	5:  {0x0003, 7},  // "0000011"
+	6:  {0x0002, 3},  // "010"
+	7:  {0x0002, 6},  // "000010"
+	8:  {0x0002, 7},  // "0000010"
+	9:  {0x0001, 7},  // "0000001"
+	10: {0x0001, 12}, // "000000000001"
+}
+
+// whiteEncodeTable2 represents Table 2 for a white run.
+var whiteEncodeTable2 = [...]bitString{
+	0:  {0x0035, 8}, // "00110101"
+	1:  {0x0007, 6}, // "000111"
+	2:  {0x0007, 4}, // "0111"
+	3:  {0x0008, 4}, // "1000"
+	4:  {0x000b, 4}, // "1011"
+	5:  {0x000c, 4}, // "1100"
+	6:  {0x000e, 4}, // "1110"
+	7:  {0x000f, 4}, // "1111"
+	8:  {0x0013, 5}, // "10011"
+	9:  {0x0014, 5}, // "10100"
+	10: {0x0007, 5}, // "00111"
+	11: {0x0008, 5}, // "01000"
+	12: {0x0008, 6}, // "001000"
+	13: {0x0003, 6}, // "000011"
+	14: {0x0034, 6}, // "110100"
+	15: {0x0035, 6}, // "110101"
+	16: {0x002a, 6}, // "101010"
+	17: {0x002b, 6}, // "101011"
+	18: {0x0027, 7}, // "0100111"
+	19: {0x000c, 7}, // "0001100"
+	20: {0x0008, 7}, // "0001000"
+	21: {0x0017, 7}, // "0010111"
+	22: {0x0003, 7}, // "0000011"
+	23: {0x0004, 7}, // "0000100"
+	24: {0x0028, 7}, // "0101000"
+	25: {0x002b, 7}, // "0101011"
+	26: {0x0013, 7}, // "0010011"
+	27: {0x0024, 7}, // "0100100"
+	28: {0x0018, 7}, // "0011000"
+	29: {0x0002, 8}, // "00000010"
+	30: {0x0003, 8}, // "00000011"
+	31: {0x001a, 8}, // "00011010"
+	32: {0x001b, 8}, // "00011011"
+	33: {0x0012, 8}, // "00010010"
+	34: {0x0013, 8}, // "00010011"
+	35: {0x0014, 8}, // "00010100"
+	36: {0x0015, 8}, // "00010101"
+	37: {0x0016, 8}, // "00010110"
+	38: {0x0017, 8}, // "00010111"
+	39: {0x0028, 8}, // "00101000"
+	40: {0x0029, 8}, // "00101001"
+	41: {0x002a, 8}, // "00101010"
+	42: {0x002b, 8}, // "00101011"
+	43: {0x002c, 8}, // "00101100"
+	44: {0x002d, 8}, // "00101101"
+	45: {0x0004, 8}, // "00000100"
+	46: {0x0005, 8}, // "00000101"
+	47: {0x000a, 8}, // "00001010"
+	48: {0x000b, 8}, // "00001011"
+	49: {0x0052, 8}, // "01010010"
+	50: {0x0053, 8}, // "01010011"
+	51: {0x0054, 8}, // "01010100"
+	52: {0x0055, 8}, // "01010101"
+	53: {0x0024, 8}, // "00100100"
+	54: {0x0025, 8}, // "00100101"
+	55: {0x0058, 8}, // "01011000"
+	56: {0x0059, 8}, // "01011001"
+	57: {0x005a, 8}, // "01011010"
+	58: {0x005b, 8}, // "01011011"
+	59: {0x004a, 8}, // "01001010"
+	60: {0x004b, 8}, // "01001011"
+	61: {0x0032, 8}, // "00110010"
+	62: {0x0033, 8}, // "00110011"
+	63: {0x0034, 8}, // "00110100"
+}
+
+// whiteEncodeTable3 represents Table 3 for a white run.
+var whiteEncodeTable3 = [...]bitString{
+	0:  {0x001b, 5},  // "11011"
+	1:  {0x0012, 5},  // "10010"
+	2:  {0x0017, 6},  // "010111"
+	3:  {0x0037, 7},  // "0110111"
+	4:  {0x0036, 8},  // "00110110"
+	5:  {0x0037, 8},  // "00110111"
+	6:  {0x0064, 8},  // "01100100"
+	7:  {0x0065, 8},  // "01100101"
+	8:  {0x0068, 8},  // "01101000"
+	9:  {0x0067, 8},  // "01100111"
+	10: {0x00cc, 9},  // "011001100"
+	11: {0x00cd, 9},  // "011001101"
+	12: {0x00d2, 9},  // "011010010"
+	13: {0x00d3, 9},  // "011010011"
+	14: {0x00d4, 9},  // "011010100"
+	15: {0x00d5, 9},  // "011010101"
+	16: {0x00d6, 9},  // "011010110"
+	17: {0x00d7, 9},  // "011010111"
+	18: {0x00d8, 9},  // "011011000"
+	19: {0x00d9, 9},  // "011011001"
+	20: {0x00da, 9},  // "011011010"
+	21: {0x00db, 9},  // "011011011"
+	22: {0x0098, 9},  // "010011000"
+	23: {0x0099, 9},  // "010011001"
+	24: {0x009a, 9},  // "010011010"
+	25: {0x0018, 6},  // "011000"
+	26: {0x009b, 9},  // "010011011"
+	27: {0x0008, 11}, // "00000001000"
+	28: {0x000c, 11}, // "00000001100"
+	29: {0x000d, 11}, // "00000001101"
+	30: {0x0012, 12}, // "000000010010"
+	31: {0x0013, 12}, // "000000010011"
+	32: {0x0014, 12}, // "000000010100"
+	33: {0x0015, 12}, // "000000010101"
+	34: {0x0016, 12}, // "000000010110"
+	35: {0x0017, 12}, // "000000010111"
+	36: {0x001c, 12}, // "000000011100"
+	37: {0x001d, 12}, // "000000011101"
+	38: {0x001e, 12}, // "000000011110"
+	39: {0x001f, 12}, // "000000011111"
+}
+
+// blackEncodeTable2 represents Table 2 for a black run.
+var blackEncodeTable2 = [...]bitString{
+	0:  {0x0037, 10}, // "0000110111"
+	1:  {0x0002, 3},  // "010"
+	2:  {0x0003, 2},  // "11"
+	3:  {0x0002, 2},  // "10"
+	4:  {0x0003, 3},  // "011"
+	5:  {0x0003, 4},  // "0011"
+	6:  {0x0002, 4},  // "0010"
+	7:  {0x0003, 5},  // "00011"
+	8:  {0x0005, 6},  // "000101"
+	9:  {0x0004, 6},  // "000100"
+	10: {0x0004, 7},  // "0000100"
+	11: {0x0005, 7},  // "0000101"
+	12: {0x0007, 7},  // "0000111"
+	13: {0x0004, 8},  // "00000100"
+	14: {0x0007, 8},  // "00000111"
+	15: {0x0018, 9},  // "000011000"
+	16: {0x0017, 10}, // "0000010111"
+	17: {0x0018, 10}, // "0000011000"
+	18: {0x0008, 10}, // "0000001000"
+	19: {0x0067, 11}, // "00001100111"
+	20: {0x0068, 11}, // "00001101000"
+	21: {0x006c, 11}, // "00001101100"
+	22: {0x0037, 11}, // "00000110111"
+	23: {0x0028, 11}, // "00000101000"
+	24: {0x0017, 11}, // "00000010111"
+	25: {0x0018, 11}, // "00000011000"
+	26: {0x00ca, 12}, // "000011001010"
+	27: {0x00cb, 12}, // "000011001011"
+	28: {0x00cc, 12}, // "000011001100"
+	29: {0x00cd, 12}, // "000011001101"
+	30: {0x0068, 12}, // "000001101000"
+	31: {0x0069, 12}, // "000001101001"
+	32: {0x006a, 12}, // "000001101010"
+	33: {0x006b, 12}, // "000001101011"
+	34: {0x00d2, 12}, // "000011010010"
+	35: {0x00d3, 12}, // "000011010011"
+	36: {0x00d4, 12}, // "000011010100"
+	37: {0x00d5, 12}, // "000011010101"
+	38: {0x00d6, 12}, // "000011010110"
+	39: {0x00d7, 12}, // "000011010111"
+	40: {0x006c, 12}, // "000001101100"
+	41: {0x006d, 12}, // "000001101101"
+	42: {0x00da, 12}, // "000011011010"
+	43: {0x00db, 12}, // "000011011011"
+	44: {0x0054, 12}, // "000001010100"
+	45: {0x0055, 12}, // "000001010101"
+	46: {0x0056, 12}, // "000001010110"
+	47: {0x0057, 12}, // "000001010111"
+	48: {0x0064, 12}, // "000001100100"
+	49: {0x0065, 12}, // "000001100101"
+	50: {0x0052, 12}, // "000001010010"
+	51: {0x0053, 12}, // "000001010011"
+	52: {0x0024, 12}, // "000000100100"
+	53: {0x0037, 12}, // "000000110111"
+	54: {0x0038, 12}, // "000000111000"
+	55: {0x0027, 12}, // "000000100111"
+	56: {0x0028, 12}, // "000000101000"
+	57: {0x0058, 12}, // "000001011000"
+	58: {0x0059, 12}, // "000001011001"
+	59: {0x002b, 12}, // "000000101011"
+	60: {0x002c, 12}, // "000000101100"
+	61: {0x005a, 12}, // "000001011010"
+	62: {0x0066, 12}, // "000001100110"
+	63: {0x0067, 12}, // "000001100111"
+}
+
+// blackEncodeTable3 represents Table 3 for a black run.
+var blackEncodeTable3 = [...]bitString{
+	0:  {0x000f, 10}, // "0000001111"
+	1:  {0x00c8, 12}, // "000011001000"
+	2:  {0x00c9, 12}, // "000011001001"
+	3:  {0x005b, 12}, // "000001011011"
+	4:  {0x0033, 12}, // "000000110011"
+	5:  {0x0034, 12}, // "000000110100"
+	6:  {0x0035, 12}, // "000000110101"
+	7:  {0x006c, 13}, // "0000001101100"
+	8:  {0x006d, 13}, // "0000001101101"
+	9:  {0x004a, 13}, // "0000001001010"
+	10: {0x004b, 13}, // "0000001001011"
+	11: {0x004c, 13}, // "0000001001100"
+	12: {0x004d, 13}, // "0000001001101"
+	13: {0x0072, 13}, // "0000001110010"
+	14: {0x0073, 13}, // "0000001110011"
+	15: {0x0074, 13}, // "0000001110100"
+	16: {0x0075, 13}, // "0000001110101"
+	17: {0x0076, 13}, // "0000001110110"
+	18: {0x0077, 13}, // "0000001110111"
+	19: {0x0052, 13}, // "0000001010010"
+	20: {0x0053, 13}, // "0000001010011"
+	21: {0x0054, 13}, // "0000001010100"
+	22: {0x0055, 13}, // "0000001010101"
+	23: {0x005a, 13}, // "0000001011010"
+	24: {0x005b, 13}, // "0000001011011"
+	25: {0x0064, 13}, // "0000001100100"
+	26: {0x0065, 13}, // "0000001100101"
+	27: {0x0008, 11}, // "00000001000"
+	28: {0x000c, 11}, // "00000001100"
+	29: {0x000d, 11}, // "00000001101"
+	30: {0x0012, 12}, // "000000010010"
+	31: {0x0013, 12}, // "000000010011"
+	32: {0x0014, 12}, // "000000010100"
+	33: {0x0015, 12}, // "000000010101"
+	34: {0x0016, 12}, // "000000010110"
+	35: {0x0017, 12}, // "000000010111"
+	36: {0x001c, 12}, // "000000011100"
+	37: {0x001d, 12}, // "000000011101"
+	38: {0x001e, 12}, // "000000011110"
+	39: {0x001f, 12}, // "000000011111"
+}
+
+// COPY PASTE table.go BEGIN
+
+const (
+	modePass = iota // Pass
+	modeH           // Horizontal
+	modeV0          // Vertical-0
+	modeVR1         // Vertical-Right-1
+	modeVR2         // Vertical-Right-2
+	modeVR3         // Vertical-Right-3
+	modeVL1         // Vertical-Left-1
+	modeVL2         // Vertical-Left-2
+	modeVL3         // Vertical-Left-3
+	modeExt         // Extension
+	modeEOL         // End-of-Line
+)
+
+// COPY PASTE table.go END

vendor/golang.org/x/image/ccitt/writer.go

@@ -0,0 +1,102 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ccitt
+
+import (
+	"encoding/binary"
+	"io"
+)
+
+type bitWriter struct {
+	w io.Writer
+
+	// order is whether to process w's bytes LSB first or MSB first.
+	order Order
+
+	// The high nBits bits of the bits field hold encoded bits to be written to w.
+	bits  uint64
+	nBits uint32
+
+	// bytes[:bw] holds encoded bytes not yet written to w.
+	// Overflow protection is ensured by using a multiple of 8 as bytes length.
+	bw    uint32
+	bytes [1024]uint8
+}
+
+// flushBits copies 64 bits from b.bits to b.bytes. If b.bytes is then full, it
+// is written to b.w.
+func (b *bitWriter) flushBits() error {
+	binary.BigEndian.PutUint64(b.bytes[b.bw:], b.bits)
+	b.bits = 0
+	b.nBits = 0
+	b.bw += 8
+	if b.bw < uint32(len(b.bytes)) {
+		return nil
+	}
+	b.bw = 0
+	if b.order != MSB {
+		reverseBitsWithinBytes(b.bytes[:])
+	}
+	_, err := b.w.Write(b.bytes[:])
+	return err
+}
+
+// close finalizes a bitcode stream by writing any
+// pending bits to bitWriter's underlying io.Writer.
+func (b *bitWriter) close() error {
+	// Write any encoded bits to bytes.
+	if b.nBits > 0 {
+		binary.BigEndian.PutUint64(b.bytes[b.bw:], b.bits)
+		b.bw += (b.nBits + 7) >> 3
+	}
+
+	if b.order != MSB {
+		reverseBitsWithinBytes(b.bytes[:b.bw])
+	}
+
+	// Write b.bw bytes to b.w.
+	_, err := b.w.Write(b.bytes[:b.bw])
+	return err
+}
+
+// alignToByteBoundary rounds b.nBits up to a multiple of 8.
+// If all 64 bits are used, flush them to bitWriter's bytes.
+func (b *bitWriter) alignToByteBoundary() error {
+	if b.nBits = (b.nBits + 7) &^ 7; b.nBits == 64 {
+		return b.flushBits()
+	}
+	return nil
+}
+
+// writeCode writes a variable length bitcode to b's underlying io.Writer.
+func (b *bitWriter) writeCode(bs bitString) error {
+	bits := bs.bits
+	nBits := bs.nBits
+	if 64-b.nBits >= nBits {
+		// b.bits has sufficient room for storing nBits bits.
+		b.bits |= uint64(bits) << (64 - nBits - b.nBits)
+		b.nBits += nBits
+		if b.nBits == 64 {
+			return b.flushBits()
+		}
+		return nil
+	}
+
+	// Number of leading bits that fill b.bits.
+	i := 64 - b.nBits
+
+	// Fill b.bits then flush and write remaining bits.
+	b.bits |= uint64(bits) >> (nBits - i)
+	b.nBits = 64
+
+	if err := b.flushBits(); err != nil {
+		return err
+	}
+
+	nBits -= i
+	b.bits = uint64(bits) << (64 - nBits)
+	b.nBits = nBits
+	return nil
+}

vendor/golang.org/x/image/tiff/buffer.go

@@ -0,0 +1,69 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package tiff
+
+import "io"
+
+// buffer buffers an io.Reader to satisfy io.ReaderAt.
+type buffer struct {
+	r   io.Reader
+	buf []byte
+}
+
+// fill reads data from b.r until the buffer contains at least end bytes.
+func (b *buffer) fill(end int) error {
+	m := len(b.buf)
+	if end > m {
+		if end > cap(b.buf) {
+			newcap := 1024
+			for newcap < end {
+				newcap *= 2
+			}
+			newbuf := make([]byte, end, newcap)
+			copy(newbuf, b.buf)
+			b.buf = newbuf
+		} else {
+			b.buf = b.buf[:end]
+		}
+		if n, err := io.ReadFull(b.r, b.buf[m:end]); err != nil {
+			end = m + n
+			b.buf = b.buf[:end]
+			return err
+		}
+	}
+	return nil
+}
+
+func (b *buffer) ReadAt(p []byte, off int64) (int, error) {
+	o := int(off)
+	end := o + len(p)
+	if int64(end) != off+int64(len(p)) {
+		return 0, io.ErrUnexpectedEOF
+	}
+
+	err := b.fill(end)
+	return copy(p, b.buf[o:end]), err
+}
+
+// Slice returns a slice of the underlying buffer. The slice contains
+// n bytes starting at offset off.
+func (b *buffer) Slice(off, n int) ([]byte, error) {
+	end := off + n
+	if err := b.fill(end); err != nil {
+		return nil, err
+	}
+	return b.buf[off:end], nil
+}
+
+// newReaderAt converts an io.Reader into an io.ReaderAt.
+func newReaderAt(r io.Reader) io.ReaderAt {
+	if ra, ok := r.(io.ReaderAt); ok {
+		return ra
+	}
+	return &buffer{
+		r:   r,
+		buf: make([]byte, 0, 1024),
+	}
+}

vendor/golang.org/x/image/tiff/compress.go

@@ -0,0 +1,58 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package tiff
+
+import (
+	"bufio"
+	"io"
+)
+
+type byteReader interface {
+	io.Reader
+	io.ByteReader
+}
+
+// unpackBits decodes the PackBits-compressed data in src and returns the
+// uncompressed data.
+//
+// The PackBits compression format is described in section 9 (p. 42)
+// of the TIFF spec.
+func unpackBits(r io.Reader) ([]byte, error) {
+	buf := make([]byte, 128)
+	dst := make([]byte, 0, 1024)
+	br, ok := r.(byteReader)
+	if !ok {
+		br = bufio.NewReader(r)
+	}
+
+	for {
+		b, err := br.ReadByte()
+		if err != nil {
+			if err == io.EOF {
+				return dst, nil
+			}
+			return nil, err
+		}
+		code := int(int8(b))
+		switch {
+		case code >= 0:
+			n, err := io.ReadFull(br, buf[:code+1])
+			if err != nil {
+				return nil, err
+			}
+			dst = append(dst, buf[:n]...)
+		case code == -128:
+			// No-op.
+		default:
+			if b, err = br.ReadByte(); err != nil {
+				return nil, err
+			}
+			for j := 0; j < 1-code; j++ {
+				buf[j] = b
+			}
+			dst = append(dst, buf[:1-code]...)
+		}
+	}
+}

vendor/golang.org/x/image/tiff/consts.go

@@ -0,0 +1,149 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package tiff
+
+// A tiff image file contains one or more images. The metadata
+// of each image is contained in an Image File Directory (IFD),
+// which contains entries of 12 bytes each and is described
+// on page 14-16 of the specification. An IFD entry consists of
+//
+//  - a tag, which describes the signification of the entry,
+//  - the data type and length of the entry,
+//  - the data itself or a pointer to it if it is more than 4 bytes.
+//
+// The presence of a length means that each IFD is effectively an array.
+
+const (
+	leHeader = "II\x2A\x00" // Header for little-endian files.
+	beHeader = "MM\x00\x2A" // Header for big-endian files.
+
+	ifdLen = 12 // Length of an IFD entry in bytes.
+)
+
+// Data types (p. 14-16 of the spec).
+const (
+	dtByte     = 1
+	dtASCII    = 2
+	dtShort    = 3
+	dtLong     = 4
+	dtRational = 5
+)
+
+// The length of one instance of each data type in bytes.
+var lengths = [...]uint32{0, 1, 1, 2, 4, 8}
+
+// Tags (see p. 28-41 of the spec).
+const (
+	tImageWidth                = 256
+	tImageLength               = 257
+	tBitsPerSample             = 258
+	tCompression               = 259
+	tPhotometricInterpretation = 262
+
+	tFillOrder = 266
+
+	tStripOffsets    = 273
+	tSamplesPerPixel = 277
+	tRowsPerStrip    = 278
+	tStripByteCounts = 279
+
+	tT4Options = 292 // CCITT Group 3 options, a set of 32 flag bits.
+	tT6Options = 293 // CCITT Group 4 options, a set of 32 flag bits.
+
+	tTileWidth      = 322
+	tTileLength     = 323
+	tTileOffsets    = 324
+	tTileByteCounts = 325
+
+	tXResolution    = 282
+	tYResolution    = 283
+	tResolutionUnit = 296
+
+	tPredictor    = 317
+	tColorMap     = 320
+	tExtraSamples = 338
+	tSampleFormat = 339
+)
+
+// Compression types (defined in various places in the spec and supplements).
+const (
+	cNone       = 1
+	cCCITT      = 2
+	cG3         = 3 // Group 3 Fax.
+	cG4         = 4 // Group 4 Fax.
+	cLZW        = 5
+	cJPEGOld    = 6 // Superseded by cJPEG.
+	cJPEG       = 7
+	cDeflate    = 8 // zlib compression.
+	cPackBits   = 32773
+	cDeflateOld = 32946 // Superseded by cDeflate.
+)
+
+// Photometric interpretation values (see p. 37 of the spec).
+const (
+	pWhiteIsZero = 0
+	pBlackIsZero = 1
+	pRGB         = 2
+	pPaletted    = 3
+	pTransMask   = 4 // transparency mask
+	pCMYK        = 5
+	pYCbCr       = 6
+	pCIELab      = 8
+)
+
+// Values for the tPredictor tag (page 64-65 of the spec).
+const (
+	prNone       = 1
+	prHorizontal = 2
+)
+
+// Values for the tResolutionUnit tag (page 18).
+const (
+	resNone    = 1
+	resPerInch = 2 // Dots per inch.
+	resPerCM   = 3 // Dots per centimeter.
+)
+
+// imageMode represents the mode of the image.
+type imageMode int
+
+const (
+	mBilevel imageMode = iota
+	mPaletted
+	mGray
+	mGrayInvert
+	mRGB
+	mRGBA
+	mNRGBA
+	mCMYK
+)
+
+// CompressionType describes the type of compression used in Options.
+type CompressionType int
+
+// Constants for supported compression types.
+const (
+	Uncompressed CompressionType = iota
+	Deflate
+	LZW
+	CCITTGroup3
+	CCITTGroup4
+)
+
+// specValue returns the compression type constant from the TIFF spec that
+// is equivalent to c.
+func (c CompressionType) specValue() uint32 {
+	switch c {
+	case LZW:
+		return cLZW
+	case Deflate:
+		return cDeflate
+	case CCITTGroup3:
+		return cG3
+	case CCITTGroup4:
+		return cG4
+	}
+	return cNone
+}

vendor/golang.org/x/image/tiff/fuzz.go

@@ -0,0 +1,29 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build gofuzz
+
+package tiff
+
+import "bytes"
+
+func Fuzz(data []byte) int {
+	cfg, err := DecodeConfig(bytes.NewReader(data))
+	if err != nil {
+		return 0
+	}
+	if cfg.Width*cfg.Height > 1e6 {
+		return 0
+	}
+	img, err := Decode(bytes.NewReader(data))
+	if err != nil {
+		return 0
+	}
+	var w bytes.Buffer
+	err = Encode(&w, img, nil)
+	if err != nil {
+		panic(err)
+	}
+	return 1
+}

vendor/golang.org/x/image/tiff/lzw/reader.go

@@ -0,0 +1,272 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package lzw implements the Lempel-Ziv-Welch compressed data format,
+// described in T. A. Welch, ``A Technique for High-Performance Data
+// Compression'', Computer, 17(6) (June 1984), pp 8-19.
+//
+// In particular, it implements LZW as used by the TIFF file format, including
+// an "off by one" algorithmic difference when compared to standard LZW.
+package lzw // import "golang.org/x/image/tiff/lzw"
+
+/*
+This file was branched from src/pkg/compress/lzw/reader.go in the
+standard library. Differences from the original are marked with "NOTE".
+
+The tif_lzw.c file in the libtiff C library has this comment:
+
+----
+The 5.0 spec describes a different algorithm than Aldus
+implements.  Specifically, Aldus does code length transitions
+one code earlier than should be done (for real LZW).
+Earlier versions of this library implemented the correct
+LZW algorithm, but emitted codes in a bit order opposite
+to the TIFF spec.  Thus, to maintain compatibility w/ Aldus
+we interpret MSB-LSB ordered codes to be images written w/
+old versions of this library, but otherwise adhere to the
+Aldus "off by one" algorithm.
+----
+
+The Go code doesn't read (invalid) TIFF files written by old versions of
+libtiff, but the LZW algorithm in this package still differs from the one in
+Go's standard package library to accomodate this "off by one" in valid TIFFs.
+*/
+
+import (
+	"bufio"
+	"errors"
+	"fmt"
+	"io"
+)
+
+// Order specifies the bit ordering in an LZW data stream.
+type Order int
+
+const (
+	// LSB means Least Significant Bits first, as used in the GIF file format.
+	LSB Order = iota
+	// MSB means Most Significant Bits first, as used in the TIFF and PDF
+	// file formats.
+	MSB
+)
+
+const (
+	maxWidth           = 12
+	decoderInvalidCode = 0xffff
+	flushBuffer        = 1 << maxWidth
+)
+
+// decoder is the state from which the readXxx method converts a byte
+// stream into a code stream.
+type decoder struct {
+	r        io.ByteReader
+	bits     uint32
+	nBits    uint
+	width    uint
+	read     func(*decoder) (uint16, error) // readLSB or readMSB
+	litWidth int                            // width in bits of literal codes
+	err      error
+
+	// The first 1<<litWidth codes are literal codes.
+	// The next two codes mean clear and EOF.
+	// Other valid codes are in the range [lo, hi] where lo := clear + 2,
+	// with the upper bound incrementing on each code seen.
+	// overflow is the code at which hi overflows the code width. NOTE: TIFF's LZW is "off by one".
+	// last is the most recently seen code, or decoderInvalidCode.
+	clear, eof, hi, overflow, last uint16
+
+	// Each code c in [lo, hi] expands to two or more bytes. For c != hi:
+	//   suffix[c] is the last of these bytes.
+	//   prefix[c] is the code for all but the last byte.
+	//   This code can either be a literal code or another code in [lo, c).
+	// The c == hi case is a special case.
+	suffix [1 << maxWidth]uint8
+	prefix [1 << maxWidth]uint16
+
+	// output is the temporary output buffer.
+	// Literal codes are accumulated from the start of the buffer.
+	// Non-literal codes decode to a sequence of suffixes that are first
+	// written right-to-left from the end of the buffer before being copied
+	// to the start of the buffer.
+	// It is flushed when it contains >= 1<<maxWidth bytes,
+	// so that there is always room to decode an entire code.
+	output [2 * 1 << maxWidth]byte
+	o      int    // write index into output
+	toRead []byte // bytes to return from Read
+}
+
+// readLSB returns the next code for "Least Significant Bits first" data.
+func (d *decoder) readLSB() (uint16, error) {
+	for d.nBits < d.width {
+		x, err := d.r.ReadByte()
+		if err != nil {
+			return 0, err
+		}
+		d.bits |= uint32(x) << d.nBits
+		d.nBits += 8
+	}
+	code := uint16(d.bits & (1<<d.width - 1))
+	d.bits >>= d.width
+	d.nBits -= d.width
+	return code, nil
+}
+
+// readMSB returns the next code for "Most Significant Bits first" data.
+func (d *decoder) readMSB() (uint16, error) {
+	for d.nBits < d.width {
+		x, err := d.r.ReadByte()
+		if err != nil {
+			return 0, err
+		}
+		d.bits |= uint32(x) << (24 - d.nBits)
+		d.nBits += 8
+	}
+	code := uint16(d.bits >> (32 - d.width))
+	d.bits <<= d.width
+	d.nBits -= d.width
+	return code, nil
+}
+
+func (d *decoder) Read(b []byte) (int, error) {
+	for {
+		if len(d.toRead) > 0 {
+			n := copy(b, d.toRead)
+			d.toRead = d.toRead[n:]
+			return n, nil
+		}
+		if d.err != nil {
+			return 0, d.err
+		}
+		d.decode()
+	}
+}
+
+// decode decompresses bytes from r and leaves them in d.toRead.
+// read specifies how to decode bytes into codes.
+// litWidth is the width in bits of literal codes.
+func (d *decoder) decode() {
+	// Loop over the code stream, converting codes into decompressed bytes.
+loop:
+	for {
+		code, err := d.read(d)
+		if err != nil {
+			if err == io.EOF {
+				err = io.ErrUnexpectedEOF
+			}
+			d.err = err
+			break
+		}
+		switch {
+		case code < d.clear:
+			// We have a literal code.
+			d.output[d.o] = uint8(code)
+			d.o++
+			if d.last != decoderInvalidCode {
+				// Save what the hi code expands to.
+				d.suffix[d.hi] = uint8(code)
+				d.prefix[d.hi] = d.last
+			}
+		case code == d.clear:
+			d.width = 1 + uint(d.litWidth)
+			d.hi = d.eof
+			d.overflow = 1 << d.width
+			d.last = decoderInvalidCode
+			continue
+		case code == d.eof:
+			d.err = io.EOF
+			break loop
+		case code <= d.hi:
+			c, i := code, len(d.output)-1
+			if code == d.hi && d.last != decoderInvalidCode {
+				// code == hi is a special case which expands to the last expansion
+				// followed by the head of the last expansion. To find the head, we walk
+				// the prefix chain until we find a literal code.
+				c = d.last
+				for c >= d.clear {
+					c = d.prefix[c]
+				}
+				d.output[i] = uint8(c)
+				i--
+				c = d.last
+			}
+			// Copy the suffix chain into output and then write that to w.
+			for c >= d.clear {
+				d.output[i] = d.suffix[c]
+				i--
+				c = d.prefix[c]
+			}
+			d.output[i] = uint8(c)
+			d.o += copy(d.output[d.o:], d.output[i:])
+			if d.last != decoderInvalidCode {
+				// Save what the hi code expands to.
+				d.suffix[d.hi] = uint8(c)
+				d.prefix[d.hi] = d.last
+			}
+		default:
+			d.err = errors.New("lzw: invalid code")
+			break loop
+		}
+		d.last, d.hi = code, d.hi+1
+		if d.hi+1 >= d.overflow { // NOTE: the "+1" is where TIFF's LZW differs from the standard algorithm.
+			if d.width == maxWidth {
+				d.last = decoderInvalidCode
+			} else {
+				d.width++
+				d.overflow <<= 1
+			}
+		}
+		if d.o >= flushBuffer {
+			break
+		}
+	}
+	// Flush pending output.
+	d.toRead = d.output[:d.o]
+	d.o = 0
+}
+
+var errClosed = errors.New("lzw: reader/writer is closed")
+
+func (d *decoder) Close() error {
+	d.err = errClosed // in case any Reads come along
+	return nil
+}
+
+// NewReader creates a new io.ReadCloser.
+// Reads from the returned io.ReadCloser read and decompress data from r.
+// If r does not also implement io.ByteReader,
+// the decompressor may read more data than necessary from r.
+// It is the caller's responsibility to call Close on the ReadCloser when
+// finished reading.
+// The number of bits to use for literal codes, litWidth, must be in the
+// range [2,8] and is typically 8. It must equal the litWidth
+// used during compression.
+func NewReader(r io.Reader, order Order, litWidth int) io.ReadCloser {
+	d := new(decoder)
+	switch order {
+	case LSB:
+		d.read = (*decoder).readLSB
+	case MSB:
+		d.read = (*decoder).readMSB
+	default:
+		d.err = errors.New("lzw: unknown order")
+		return d
+	}
+	if litWidth < 2 || 8 < litWidth {
+		d.err = fmt.Errorf("lzw: litWidth %d out of range", litWidth)
+		return d
+	}
+	if br, ok := r.(io.ByteReader); ok {
+		d.r = br
+	} else {
+		d.r = bufio.NewReader(r)
+	}
+	d.litWidth = litWidth
+	d.width = 1 + uint(litWidth)
+	d.clear = uint16(1) << uint(litWidth)
+	d.eof, d.hi = d.clear+1, d.clear+1
+	d.overflow = uint16(1) << d.width
+	d.last = decoderInvalidCode
+
+	return d
+}

vendor/golang.org/x/image/tiff/reader.go

@@ -0,0 +1,706 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package tiff implements a TIFF image decoder and encoder.
+//
+// The TIFF specification is at http://partners.adobe.com/public/developer/en/tiff/TIFF6.pdf
+package tiff // import "golang.org/x/image/tiff"
+
+import (
+	"compress/zlib"
+	"encoding/binary"
+	"fmt"
+	"image"
+	"image/color"
+	"io"
+	"io/ioutil"
+	"math"
+
+	"golang.org/x/image/ccitt"
+	"golang.org/x/image/tiff/lzw"
+)
+
+// A FormatError reports that the input is not a valid TIFF image.
+type FormatError string
+
+func (e FormatError) Error() string {
+	return "tiff: invalid format: " + string(e)
+}
+
+// An UnsupportedError reports that the input uses a valid but
+// unimplemented feature.
+type UnsupportedError string
+
+func (e UnsupportedError) Error() string {
+	return "tiff: unsupported feature: " + string(e)
+}
+
+var errNoPixels = FormatError("not enough pixel data")
+
+type decoder struct {
+	r         io.ReaderAt
+	byteOrder binary.ByteOrder
+	config    image.Config
+	mode      imageMode
+	bpp       uint
+	features  map[int][]uint
+	palette   []color.Color
+
+	buf   []byte
+	off   int    // Current offset in buf.
+	v     uint32 // Buffer value for reading with arbitrary bit depths.
+	nbits uint   // Remaining number of bits in v.
+}
+
+// firstVal returns the first uint of the features entry with the given tag,
+// or 0 if the tag does not exist.
+func (d *decoder) firstVal(tag int) uint {
+	f := d.features[tag]
+	if len(f) == 0 {
+		return 0
+	}
+	return f[0]
+}
+
+// ifdUint decodes the IFD entry in p, which must be of the Byte, Short
+// or Long type, and returns the decoded uint values.
+func (d *decoder) ifdUint(p []byte) (u []uint, err error) {
+	var raw []byte
+	if len(p) < ifdLen {
+		return nil, FormatError("bad IFD entry")
+	}
+
+	datatype := d.byteOrder.Uint16(p[2:4])
+	if dt := int(datatype); dt <= 0 || dt >= len(lengths) {
+		return nil, UnsupportedError("IFD entry datatype")
+	}
+
+	count := d.byteOrder.Uint32(p[4:8])
+	if count > math.MaxInt32/lengths[datatype] {
+		return nil, FormatError("IFD data too large")
+	}
+	if datalen := lengths[datatype] * count; datalen > 4 {
+		// The IFD contains a pointer to the real value.
+		raw = make([]byte, datalen)
+		_, err = d.r.ReadAt(raw, int64(d.byteOrder.Uint32(p[8:12])))
+	} else {
+		raw = p[8 : 8+datalen]
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	u = make([]uint, count)
+	switch datatype {
+	case dtByte:
+		for i := uint32(0); i < count; i++ {
+			u[i] = uint(raw[i])
+		}
+	case dtShort:
+		for i := uint32(0); i < count; i++ {
+			u[i] = uint(d.byteOrder.Uint16(raw[2*i : 2*(i+1)]))
+		}
+	case dtLong:
+		for i := uint32(0); i < count; i++ {
+			u[i] = uint(d.byteOrder.Uint32(raw[4*i : 4*(i+1)]))
+		}
+	default:
+		return nil, UnsupportedError("data type")
+	}
+	return u, nil
+}
+
+// parseIFD decides whether the IFD entry in p is "interesting" and
+// stows away the data in the decoder. It returns the tag number of the
+// entry and an error, if any.
+func (d *decoder) parseIFD(p []byte) (int, error) {
+	tag := d.byteOrder.Uint16(p[0:2])
+	switch tag {
+	case tBitsPerSample,
+		tExtraSamples,
+		tPhotometricInterpretation,
+		tCompression,
+		tPredictor,
+		tStripOffsets,
+		tStripByteCounts,
+		tRowsPerStrip,
+		tTileWidth,
+		tTileLength,
+		tTileOffsets,
+		tTileByteCounts,
+		tImageLength,
+		tImageWidth,
+		tFillOrder,
+		tT4Options,
+		tT6Options:
+		val, err := d.ifdUint(p)
+		if err != nil {
+			return 0, err
+		}
+		d.features[int(tag)] = val
+	case tColorMap:
+		val, err := d.ifdUint(p)
+		if err != nil {
+			return 0, err
+		}
+		numcolors := len(val) / 3
+		if len(val)%3 != 0 || numcolors <= 0 || numcolors > 256 {
+			return 0, FormatError("bad ColorMap length")
+		}
+		d.palette = make([]color.Color, numcolors)
+		for i := 0; i < numcolors; i++ {
+			d.palette[i] = color.RGBA64{
+				uint16(val[i]),
+				uint16(val[i+numcolors]),
+				uint16(val[i+2*numcolors]),
+				0xffff,
+			}
+		}
+	case tSampleFormat:
+		// Page 27 of the spec: If the SampleFormat is present and
+		// the value is not 1 [= unsigned integer data], a Baseline
+		// TIFF reader that cannot handle the SampleFormat value
+		// must terminate the import process gracefully.
+		val, err := d.ifdUint(p)
+		if err != nil {
+			return 0, err
+		}
+		for _, v := range val {
+			if v != 1 {
+				return 0, UnsupportedError("sample format")
+			}
+		}
+	}
+	return int(tag), nil
+}
+
+// readBits reads n bits from the internal buffer starting at the current offset.
+func (d *decoder) readBits(n uint) (v uint32, ok bool) {
+	for d.nbits < n {
+		d.v <<= 8
+		if d.off >= len(d.buf) {
+			return 0, false
+		}
+		d.v |= uint32(d.buf[d.off])
+		d.off++
+		d.nbits += 8
+	}
+	d.nbits -= n
+	rv := d.v >> d.nbits
+	d.v &^= rv << d.nbits
+	return rv, true
+}
+
+// flushBits discards the unread bits in the buffer used by readBits.
+// It is used at the end of a line.
+func (d *decoder) flushBits() {
+	d.v = 0
+	d.nbits = 0
+}
+
+// minInt returns the smaller of x or y.
+func minInt(a, b int) int {
+	if a <= b {
+		return a
+	}
+	return b
+}
+
+// decode decodes the raw data of an image.
+// It reads from d.buf and writes the strip or tile into dst.
+func (d *decoder) decode(dst image.Image, xmin, ymin, xmax, ymax int) error {
+	d.off = 0
+
+	// Apply horizontal predictor if necessary.
+	// In this case, p contains the color difference to the preceding pixel.
+	// See page 64-65 of the spec.
+	if d.firstVal(tPredictor) == prHorizontal {
+		switch d.bpp {
+		case 16:
+			var off int
+			n := 2 * len(d.features[tBitsPerSample]) // bytes per sample times samples per pixel
+			for y := ymin; y < ymax; y++ {
+				off += n
+				for x := 0; x < (xmax-xmin-1)*n; x += 2 {
+					if off+2 > len(d.buf) {
+						return errNoPixels
+					}
+					v0 := d.byteOrder.Uint16(d.buf[off-n : off-n+2])
+					v1 := d.byteOrder.Uint16(d.buf[off : off+2])
+					d.byteOrder.PutUint16(d.buf[off:off+2], v1+v0)
+					off += 2
+				}
+			}
+		case 8:
+			var off int
+			n := 1 * len(d.features[tBitsPerSample]) // bytes per sample times samples per pixel
+			for y := ymin; y < ymax; y++ {
+				off += n
+				for x := 0; x < (xmax-xmin-1)*n; x++ {
+					if off >= len(d.buf) {
+						return errNoPixels
+					}
+					d.buf[off] += d.buf[off-n]
+					off++
+				}
+			}
+		case 1:
+			return UnsupportedError("horizontal predictor with 1 BitsPerSample")
+		}
+	}
+
+	rMaxX := minInt(xmax, dst.Bounds().Max.X)
+	rMaxY := minInt(ymax, dst.Bounds().Max.Y)
+	switch d.mode {
+	case mGray, mGrayInvert:
+		if d.bpp == 16 {
+			img := dst.(*image.Gray16)
+			for y := ymin; y < rMaxY; y++ {
+				for x := xmin; x < rMaxX; x++ {
+					if d.off+2 > len(d.buf) {
+						return errNoPixels
+					}
+					v := d.byteOrder.Uint16(d.buf[d.off : d.off+2])
+					d.off += 2
+					if d.mode == mGrayInvert {
+						v = 0xffff - v
+					}
+					img.SetGray16(x, y, color.Gray16{v})
+				}
+				if rMaxX == img.Bounds().Max.X {
+					d.off += 2 * (xmax - img.Bounds().Max.X)
+				}
+			}
+		} else {
+			img := dst.(*image.Gray)
+			max := uint32((1 << d.bpp) - 1)
+			for y := ymin; y < rMaxY; y++ {
+				for x := xmin; x < rMaxX; x++ {
+					v, ok := d.readBits(d.bpp)
+					if !ok {
+						return errNoPixels
+					}
+					v = v * 0xff / max
+					if d.mode == mGrayInvert {
+						v = 0xff - v
+					}
+					img.SetGray(x, y, color.Gray{uint8(v)})
+				}
+				d.flushBits()
+			}
+		}
+	case mPaletted:
+		img := dst.(*image.Paletted)
+		for y := ymin; y < rMaxY; y++ {
+			for x := xmin; x < rMaxX; x++ {
+				v, ok := d.readBits(d.bpp)
+				if !ok {
+					return errNoPixels
+				}
+				img.SetColorIndex(x, y, uint8(v))
+			}
+			d.flushBits()
+		}
+	case mRGB:
+		if d.bpp == 16 {
+			img := dst.(*image.RGBA64)
+			for y := ymin; y < rMaxY; y++ {
+				for x := xmin; x < rMaxX; x++ {
+					if d.off+6 > len(d.buf) {
+						return errNoPixels
+					}
+					r := d.byteOrder.Uint16(d.buf[d.off+0 : d.off+2])
+					g := d.byteOrder.Uint16(d.buf[d.off+2 : d.off+4])
+					b := d.byteOrder.Uint16(d.buf[d.off+4 : d.off+6])
+					d.off += 6
+					img.SetRGBA64(x, y, color.RGBA64{r, g, b, 0xffff})
+				}
+			}
+		} else {
+			img := dst.(*image.RGBA)
+			for y := ymin; y < rMaxY; y++ {
+				min := img.PixOffset(xmin, y)
+				max := img.PixOffset(rMaxX, y)
+				off := (y - ymin) * (xmax - xmin) * 3
+				for i := min; i < max; i += 4 {
+					if off+3 > len(d.buf) {
+						return errNoPixels
+					}
+					img.Pix[i+0] = d.buf[off+0]
+					img.Pix[i+1] = d.buf[off+1]
+					img.Pix[i+2] = d.buf[off+2]
+					img.Pix[i+3] = 0xff
+					off += 3
+				}
+			}
+		}
+	case mNRGBA:
+		if d.bpp == 16 {
+			img := dst.(*image.NRGBA64)
+			for y := ymin; y < rMaxY; y++ {
+				for x := xmin; x < rMaxX; x++ {
+					if d.off+8 > len(d.buf) {
+						return errNoPixels
+					}
+					r := d.byteOrder.Uint16(d.buf[d.off+0 : d.off+2])
+					g := d.byteOrder.Uint16(d.buf[d.off+2 : d.off+4])
+					b := d.byteOrder.Uint16(d.buf[d.off+4 : d.off+6])
+					a := d.byteOrder.Uint16(d.buf[d.off+6 : d.off+8])
+					d.off += 8
+					img.SetNRGBA64(x, y, color.NRGBA64{r, g, b, a})
+				}
+			}
+		} else {
+			img := dst.(*image.NRGBA)
+			for y := ymin; y < rMaxY; y++ {
+				min := img.PixOffset(xmin, y)
+				max := img.PixOffset(rMaxX, y)
+				i0, i1 := (y-ymin)*(xmax-xmin)*4, (y-ymin+1)*(xmax-xmin)*4
+				if i1 > len(d.buf) {
+					return errNoPixels
+				}
+				copy(img.Pix[min:max], d.buf[i0:i1])
+			}
+		}
+	case mRGBA:
+		if d.bpp == 16 {
+			img := dst.(*image.RGBA64)
+			for y := ymin; y < rMaxY; y++ {
+				for x := xmin; x < rMaxX; x++ {
+					if d.off+8 > len(d.buf) {
+						return errNoPixels
+					}
+					r := d.byteOrder.Uint16(d.buf[d.off+0 : d.off+2])
+					g := d.byteOrder.Uint16(d.buf[d.off+2 : d.off+4])
+					b := d.byteOrder.Uint16(d.buf[d.off+4 : d.off+6])
+					a := d.byteOrder.Uint16(d.buf[d.off+6 : d.off+8])
+					d.off += 8
+					img.SetRGBA64(x, y, color.RGBA64{r, g, b, a})
+				}
+			}
+		} else {
+			img := dst.(*image.RGBA)
+			for y := ymin; y < rMaxY; y++ {
+				min := img.PixOffset(xmin, y)
+				max := img.PixOffset(rMaxX, y)
+				i0, i1 := (y-ymin)*(xmax-xmin)*4, (y-ymin+1)*(xmax-xmin)*4
+				if i1 > len(d.buf) {
+					return errNoPixels
+				}
+				copy(img.Pix[min:max], d.buf[i0:i1])
+			}
+		}
+	}
+
+	return nil
+}
+
+func newDecoder(r io.Reader) (*decoder, error) {
+	d := &decoder{
+		r:        newReaderAt(r),
+		features: make(map[int][]uint),
+	}
+
+	p := make([]byte, 8)
+	if _, err := d.r.ReadAt(p, 0); err != nil {
+		return nil, err
+	}
+	switch string(p[0:4]) {
+	case leHeader:
+		d.byteOrder = binary.LittleEndian
+	case beHeader:
+		d.byteOrder = binary.BigEndian
+	default:
+		return nil, FormatError("malformed header")
+	}
+
+	ifdOffset := int64(d.byteOrder.Uint32(p[4:8]))
+
+	// The first two bytes contain the number of entries (12 bytes each).
+	if _, err := d.r.ReadAt(p[0:2], ifdOffset); err != nil {
+		return nil, err
+	}
+	numItems := int(d.byteOrder.Uint16(p[0:2]))
+
+	// All IFD entries are read in one chunk.
+	p = make([]byte, ifdLen*numItems)
+	if _, err := d.r.ReadAt(p, ifdOffset+2); err != nil {
+		return nil, err
+	}
+
+	prevTag := -1
+	for i := 0; i < len(p); i += ifdLen {
+		tag, err := d.parseIFD(p[i : i+ifdLen])
+		if err != nil {
+			return nil, err
+		}
+		if tag <= prevTag {
+			return nil, FormatError("tags are not sorted in ascending order")
+		}
+		prevTag = tag
+	}
+
+	d.config.Width = int(d.firstVal(tImageWidth))
+	d.config.Height = int(d.firstVal(tImageLength))
+
+	if _, ok := d.features[tBitsPerSample]; !ok {
+		// Default is 1 per specification.
+		d.features[tBitsPerSample] = []uint{1}
+	}
+	d.bpp = d.firstVal(tBitsPerSample)
+	switch d.bpp {
+	case 0:
+		return nil, FormatError("BitsPerSample must not be 0")
+	case 1, 8, 16:
+		// Nothing to do, these are accepted by this implementation.
+	default:
+		return nil, UnsupportedError(fmt.Sprintf("BitsPerSample of %v", d.bpp))
+	}
+
+	// Determine the image mode.
+	switch d.firstVal(tPhotometricInterpretation) {
+	case pRGB:
+		if d.bpp == 16 {
+			for _, b := range d.features[tBitsPerSample] {
+				if b != 16 {
+					return nil, FormatError("wrong number of samples for 16bit RGB")
+				}
+			}
+		} else {
+			for _, b := range d.features[tBitsPerSample] {
+				if b != 8 {
+					return nil, FormatError("wrong number of samples for 8bit RGB")
+				}
+			}
+		}
+		// RGB images normally have 3 samples per pixel.
+		// If there are more, ExtraSamples (p. 31-32 of the spec)
+		// gives their meaning (usually an alpha channel).
+		//
+		// This implementation does not support extra samples
+		// of an unspecified type.
+		switch len(d.features[tBitsPerSample]) {
+		case 3:
+			d.mode = mRGB
+			if d.bpp == 16 {
+				d.config.ColorModel = color.RGBA64Model
+			} else {
+				d.config.ColorModel = color.RGBAModel
+			}
+		case 4:
+			switch d.firstVal(tExtraSamples) {
+			case 1:
+				d.mode = mRGBA
+				if d.bpp == 16 {
+					d.config.ColorModel = color.RGBA64Model
+				} else {
+					d.config.ColorModel = color.RGBAModel
+				}
+			case 2:
+				d.mode = mNRGBA
+				if d.bpp == 16 {
+					d.config.ColorModel = color.NRGBA64Model
+				} else {
+					d.config.ColorModel = color.NRGBAModel
+				}
+			default:
+				return nil, FormatError("wrong number of samples for RGB")
+			}
+		default:
+			return nil, FormatError("wrong number of samples for RGB")
+		}
+	case pPaletted:
+		d.mode = mPaletted
+		d.config.ColorModel = color.Palette(d.palette)
+	case pWhiteIsZero:
+		d.mode = mGrayInvert
+		if d.bpp == 16 {
+			d.config.ColorModel = color.Gray16Model
+		} else {
+			d.config.ColorModel = color.GrayModel
+		}
+	case pBlackIsZero:
+		d.mode = mGray
+		if d.bpp == 16 {
+			d.config.ColorModel = color.Gray16Model
+		} else {
+			d.config.ColorModel = color.GrayModel
+		}
+	default:
+		return nil, UnsupportedError("color model")
+	}
+
+	return d, nil
+}
+
+// DecodeConfig returns the color model and dimensions of a TIFF image without
+// decoding the entire image.
+func DecodeConfig(r io.Reader) (image.Config, error) {
+	d, err := newDecoder(r)
+	if err != nil {
+		return image.Config{}, err
+	}
+	return d.config, nil
+}
+
+func ccittFillOrder(tiffFillOrder uint) ccitt.Order {
+	if tiffFillOrder == 2 {
+		return ccitt.LSB
+	}
+	return ccitt.MSB
+}
+
+// Decode reads a TIFF image from r and returns it as an image.Image.
+// The type of Image returned depends on the contents of the TIFF.
+func Decode(r io.Reader) (img image.Image, err error) {
+	d, err := newDecoder(r)
+	if err != nil {
+		return
+	}
+
+	blockPadding := false
+	blockWidth := d.config.Width
+	blockHeight := d.config.Height
+	blocksAcross := 1
+	blocksDown := 1
+
+	if d.config.Width == 0 {
+		blocksAcross = 0
+	}
+	if d.config.Height == 0 {
+		blocksDown = 0
+	}
+
+	var blockOffsets, blockCounts []uint
+
+	if int(d.firstVal(tTileWidth)) != 0 {
+		blockPadding = true
+
+		blockWidth = int(d.firstVal(tTileWidth))
+		blockHeight = int(d.firstVal(tTileLength))
+
+		if blockWidth != 0 {
+			blocksAcross = (d.config.Width + blockWidth - 1) / blockWidth
+		}
+		if blockHeight != 0 {
+			blocksDown = (d.config.Height + blockHeight - 1) / blockHeight
+		}
+
+		blockCounts = d.features[tTileByteCounts]
+		blockOffsets = d.features[tTileOffsets]
+
+	} else {
+		if int(d.firstVal(tRowsPerStrip)) != 0 {
+			blockHeight = int(d.firstVal(tRowsPerStrip))
+		}
+
+		if blockHeight != 0 {
+			blocksDown = (d.config.Height + blockHeight - 1) / blockHeight
+		}
+
+		blockOffsets = d.features[tStripOffsets]
+		blockCounts = d.features[tStripByteCounts]
+	}
+
+	// Check if we have the right number of strips/tiles, offsets and counts.
+	if n := blocksAcross * blocksDown; len(blockOffsets) < n || len(blockCounts) < n {
+		return nil, FormatError("inconsistent header")
+	}
+
+	imgRect := image.Rect(0, 0, d.config.Width, d.config.Height)
+	switch d.mode {
+	case mGray, mGrayInvert:
+		if d.bpp == 16 {
+			img = image.NewGray16(imgRect)
+		} else {
+			img = image.NewGray(imgRect)
+		}
+	case mPaletted:
+		img = image.NewPaletted(imgRect, d.palette)
+	case mNRGBA:
+		if d.bpp == 16 {
+			img = image.NewNRGBA64(imgRect)
+		} else {
+			img = image.NewNRGBA(imgRect)
+		}
+	case mRGB, mRGBA:
+		if d.bpp == 16 {
+			img = image.NewRGBA64(imgRect)
+		} else {
+			img = image.NewRGBA(imgRect)
+		}
+	}
+
+	for i := 0; i < blocksAcross; i++ {
+		blkW := blockWidth
+		if !blockPadding && i == blocksAcross-1 && d.config.Width%blockWidth != 0 {
+			blkW = d.config.Width % blockWidth
+		}
+		for j := 0; j < blocksDown; j++ {
+			blkH := blockHeight
+			if !blockPadding && j == blocksDown-1 && d.config.Height%blockHeight != 0 {
+				blkH = d.config.Height % blockHeight
+			}
+			offset := int64(blockOffsets[j*blocksAcross+i])
+			n := int64(blockCounts[j*blocksAcross+i])
+			switch d.firstVal(tCompression) {
+
+			// According to the spec, Compression does not have a default value,
+			// but some tools interpret a missing Compression value as none so we do
+			// the same.
+			case cNone, 0:
+				if b, ok := d.r.(*buffer); ok {
+					d.buf, err = b.Slice(int(offset), int(n))
+				} else {
+					d.buf = make([]byte, n)
+					_, err = d.r.ReadAt(d.buf, offset)
+				}
+			case cG3:
+				inv := d.firstVal(tPhotometricInterpretation) == pWhiteIsZero
+				order := ccittFillOrder(d.firstVal(tFillOrder))
+				r := ccitt.NewReader(io.NewSectionReader(d.r, offset, n), order, ccitt.Group3, blkW, blkH, &ccitt.Options{Invert: inv, Align: false})
+				d.buf, err = ioutil.ReadAll(r)
+			case cG4:
+				inv := d.firstVal(tPhotometricInterpretation) == pWhiteIsZero
+				order := ccittFillOrder(d.firstVal(tFillOrder))
+				r := ccitt.NewReader(io.NewSectionReader(d.r, offset, n), order, ccitt.Group4, blkW, blkH, &ccitt.Options{Invert: inv, Align: false})
+				d.buf, err = ioutil.ReadAll(r)
+			case cLZW:
+				r := lzw.NewReader(io.NewSectionReader(d.r, offset, n), lzw.MSB, 8)
+				d.buf, err = ioutil.ReadAll(r)
+				r.Close()
+			case cDeflate, cDeflateOld:
+				var r io.ReadCloser
+				r, err = zlib.NewReader(io.NewSectionReader(d.r, offset, n))
+				if err != nil {
+					return nil, err
+				}
+				d.buf, err = ioutil.ReadAll(r)
+				r.Close()
+			case cPackBits:
+				d.buf, err = unpackBits(io.NewSectionReader(d.r, offset, n))
+			default:
+				err = UnsupportedError(fmt.Sprintf("compression value %d", d.firstVal(tCompression)))
+			}
+			if err != nil {
+				return nil, err
+			}
+
+			xmin := i * blockWidth
+			ymin := j * blockHeight
+			xmax := xmin + blkW
+			ymax := ymin + blkH
+			err = d.decode(img, xmin, ymin, xmax, ymax)
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+	return
+}
+
+func init() {
+	image.RegisterFormat("tiff", leHeader, Decode, DecodeConfig)
+	image.RegisterFormat("tiff", beHeader, Decode, DecodeConfig)
+}

vendor/golang.org/x/image/tiff/writer.go

@@ -0,0 +1,438 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package tiff
+
+import (
+	"bytes"
+	"compress/zlib"
+	"encoding/binary"
+	"image"
+	"io"
+	"sort"
+)
+
+// The TIFF format allows to choose the order of the different elements freely.
+// The basic structure of a TIFF file written by this package is:
+//
+//   1. Header (8 bytes).
+//   2. Image data.
+//   3. Image File Directory (IFD).
+//   4. "Pointer area" for larger entries in the IFD.
+
+// We only write little-endian TIFF files.
+var enc = binary.LittleEndian
+
+// An ifdEntry is a single entry in an Image File Directory.
+// A value of type dtRational is composed of two 32-bit values,
+// thus data contains two uints (numerator and denominator) for a single number.
+type ifdEntry struct {
+	tag      int
+	datatype int
+	data     []uint32
+}
+
+func (e ifdEntry) putData(p []byte) {
+	for _, d := range e.data {
+		switch e.datatype {
+		case dtByte, dtASCII:
+			p[0] = byte(d)
+			p = p[1:]
+		case dtShort:
+			enc.PutUint16(p, uint16(d))
+			p = p[2:]
+		case dtLong, dtRational:
+			enc.PutUint32(p, uint32(d))
+			p = p[4:]
+		}
+	}
+}
+
+type byTag []ifdEntry
+
+func (d byTag) Len() int           { return len(d) }
+func (d byTag) Less(i, j int) bool { return d[i].tag < d[j].tag }
+func (d byTag) Swap(i, j int)      { d[i], d[j] = d[j], d[i] }
+
+func encodeGray(w io.Writer, pix []uint8, dx, dy, stride int, predictor bool) error {
+	if !predictor {
+		return writePix(w, pix, dy, dx, stride)
+	}
+	buf := make([]byte, dx)
+	for y := 0; y < dy; y++ {
+		min := y*stride + 0
+		max := y*stride + dx
+		off := 0
+		var v0 uint8
+		for i := min; i < max; i++ {
+			v1 := pix[i]
+			buf[off] = v1 - v0
+			v0 = v1
+			off++
+		}
+		if _, err := w.Write(buf); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func encodeGray16(w io.Writer, pix []uint8, dx, dy, stride int, predictor bool) error {
+	buf := make([]byte, dx*2)
+	for y := 0; y < dy; y++ {
+		min := y*stride + 0
+		max := y*stride + dx*2
+		off := 0
+		var v0 uint16
+		for i := min; i < max; i += 2 {
+			// An image.Gray16's Pix is in big-endian order.
+			v1 := uint16(pix[i])<<8 | uint16(pix[i+1])
+			if predictor {
+				v0, v1 = v1, v1-v0
+			}
+			// We only write little-endian TIFF files.
+			buf[off+0] = byte(v1)
+			buf[off+1] = byte(v1 >> 8)
+			off += 2
+		}
+		if _, err := w.Write(buf); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func encodeRGBA(w io.Writer, pix []uint8, dx, dy, stride int, predictor bool) error {
+	if !predictor {
+		return writePix(w, pix, dy, dx*4, stride)
+	}
+	buf := make([]byte, dx*4)
+	for y := 0; y < dy; y++ {
+		min := y*stride + 0
+		max := y*stride + dx*4
+		off := 0
+		var r0, g0, b0, a0 uint8
+		for i := min; i < max; i += 4 {
+			r1, g1, b1, a1 := pix[i+0], pix[i+1], pix[i+2], pix[i+3]
+			buf[off+0] = r1 - r0
+			buf[off+1] = g1 - g0
+			buf[off+2] = b1 - b0
+			buf[off+3] = a1 - a0
+			off += 4
+			r0, g0, b0, a0 = r1, g1, b1, a1
+		}
+		if _, err := w.Write(buf); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func encodeRGBA64(w io.Writer, pix []uint8, dx, dy, stride int, predictor bool) error {
+	buf := make([]byte, dx*8)
+	for y := 0; y < dy; y++ {
+		min := y*stride + 0
+		max := y*stride + dx*8
+		off := 0
+		var r0, g0, b0, a0 uint16
+		for i := min; i < max; i += 8 {
+			// An image.RGBA64's Pix is in big-endian order.
+			r1 := uint16(pix[i+0])<<8 | uint16(pix[i+1])
+			g1 := uint16(pix[i+2])<<8 | uint16(pix[i+3])
+			b1 := uint16(pix[i+4])<<8 | uint16(pix[i+5])
+			a1 := uint16(pix[i+6])<<8 | uint16(pix[i+7])
+			if predictor {
+				r0, r1 = r1, r1-r0
+				g0, g1 = g1, g1-g0
+				b0, b1 = b1, b1-b0
+				a0, a1 = a1, a1-a0
+			}
+			// We only write little-endian TIFF files.
+			buf[off+0] = byte(r1)
+			buf[off+1] = byte(r1 >> 8)
+			buf[off+2] = byte(g1)
+			buf[off+3] = byte(g1 >> 8)
+			buf[off+4] = byte(b1)
+			buf[off+5] = byte(b1 >> 8)
+			buf[off+6] = byte(a1)
+			buf[off+7] = byte(a1 >> 8)
+			off += 8
+		}
+		if _, err := w.Write(buf); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func encode(w io.Writer, m image.Image, predictor bool) error {
+	bounds := m.Bounds()
+	buf := make([]byte, 4*bounds.Dx())
+	for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
+		off := 0
+		if predictor {
+			var r0, g0, b0, a0 uint8
+			for x := bounds.Min.X; x < bounds.Max.X; x++ {
+				r, g, b, a := m.At(x, y).RGBA()
+				r1 := uint8(r >> 8)
+				g1 := uint8(g >> 8)
+				b1 := uint8(b >> 8)
+				a1 := uint8(a >> 8)
+				buf[off+0] = r1 - r0
+				buf[off+1] = g1 - g0
+				buf[off+2] = b1 - b0
+				buf[off+3] = a1 - a0
+				off += 4
+				r0, g0, b0, a0 = r1, g1, b1, a1
+			}
+		} else {
+			for x := bounds.Min.X; x < bounds.Max.X; x++ {
+				r, g, b, a := m.At(x, y).RGBA()
+				buf[off+0] = uint8(r >> 8)
+				buf[off+1] = uint8(g >> 8)
+				buf[off+2] = uint8(b >> 8)
+				buf[off+3] = uint8(a >> 8)
+				off += 4
+			}
+		}
+		if _, err := w.Write(buf); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// writePix writes the internal byte array of an image to w. It is less general
+// but much faster then encode. writePix is used when pix directly
+// corresponds to one of the TIFF image types.
+func writePix(w io.Writer, pix []byte, nrows, length, stride int) error {
+	if length == stride {
+		_, err := w.Write(pix[:nrows*length])
+		return err
+	}
+	for ; nrows > 0; nrows-- {
+		if _, err := w.Write(pix[:length]); err != nil {
+			return err
+		}
+		pix = pix[stride:]
+	}
+	return nil
+}
+
+func writeIFD(w io.Writer, ifdOffset int, d []ifdEntry) error {
+	var buf [ifdLen]byte
+	// Make space for "pointer area" containing IFD entry data
+	// longer than 4 bytes.
+	parea := make([]byte, 1024)
+	pstart := ifdOffset + ifdLen*len(d) + 6
+	var o int // Current offset in parea.
+
+	// The IFD has to be written with the tags in ascending order.
+	sort.Sort(byTag(d))
+
+	// Write the number of entries in this IFD.
+	if err := binary.Write(w, enc, uint16(len(d))); err != nil {
+		return err
+	}
+	for _, ent := range d {
+		enc.PutUint16(buf[0:2], uint16(ent.tag))
+		enc.PutUint16(buf[2:4], uint16(ent.datatype))
+		count := uint32(len(ent.data))
+		if ent.datatype == dtRational {
+			count /= 2
+		}
+		enc.PutUint32(buf[4:8], count)
+		datalen := int(count * lengths[ent.datatype])
+		if datalen <= 4 {
+			ent.putData(buf[8:12])
+		} else {
+			if (o + datalen) > len(parea) {
+				newlen := len(parea) + 1024
+				for (o + datalen) > newlen {
+					newlen += 1024
+				}
+				newarea := make([]byte, newlen)
+				copy(newarea, parea)
+				parea = newarea
+			}
+			ent.putData(parea[o : o+datalen])
+			enc.PutUint32(buf[8:12], uint32(pstart+o))
+			o += datalen
+		}
+		if _, err := w.Write(buf[:]); err != nil {
+			return err
+		}
+	}
+	// The IFD ends with the offset of the next IFD in the file,
+	// or zero if it is the last one (page 14).
+	if err := binary.Write(w, enc, uint32(0)); err != nil {
+		return err
+	}
+	_, err := w.Write(parea[:o])
+	return err
+}
+
+// Options are the encoding parameters.
+type Options struct {
+	// Compression is the type of compression used.
+	Compression CompressionType
+	// Predictor determines whether a differencing predictor is used;
+	// if true, instead of each pixel's color, the color difference to the
+	// preceding one is saved.  This improves the compression for certain
+	// types of images and compressors. For example, it works well for
+	// photos with Deflate compression.
+	Predictor bool
+}
+
+// Encode writes the image m to w. opt determines the options used for
+// encoding, such as the compression type. If opt is nil, an uncompressed
+// image is written.
+func Encode(w io.Writer, m image.Image, opt *Options) error {
+	d := m.Bounds().Size()
+
+	compression := uint32(cNone)
+	predictor := false
+	if opt != nil {
+		compression = opt.Compression.specValue()
+		// The predictor field is only used with LZW. See page 64 of the spec.
+		predictor = opt.Predictor && compression == cLZW
+	}
+
+	_, err := io.WriteString(w, leHeader)
+	if err != nil {
+		return err
+	}
+
+	// Compressed data is written into a buffer first, so that we
+	// know the compressed size.
+	var buf bytes.Buffer
+	// dst holds the destination for the pixel data of the image --
+	// either w or a writer to buf.
+	var dst io.Writer
+	// imageLen is the length of the pixel data in bytes.
+	// The offset of the IFD is imageLen + 8 header bytes.
+	var imageLen int
+
+	switch compression {
+	case cNone:
+		dst = w
+		// Write IFD offset before outputting pixel data.
+		switch m.(type) {
+		case *image.Paletted:
+			imageLen = d.X * d.Y * 1
+		case *image.Gray:
+			imageLen = d.X * d.Y * 1
+		case *image.Gray16:
+			imageLen = d.X * d.Y * 2
+		case *image.RGBA64:
+			imageLen = d.X * d.Y * 8
+		case *image.NRGBA64:
+			imageLen = d.X * d.Y * 8
+		default:
+			imageLen = d.X * d.Y * 4
+		}
+		err = binary.Write(w, enc, uint32(imageLen+8))
+		if err != nil {
+			return err
+		}
+	case cDeflate:
+		dst = zlib.NewWriter(&buf)
+	}
+
+	pr := uint32(prNone)
+	photometricInterpretation := uint32(pRGB)
+	samplesPerPixel := uint32(4)
+	bitsPerSample := []uint32{8, 8, 8, 8}
+	extraSamples := uint32(0)
+	colorMap := []uint32{}
+
+	if predictor {
+		pr = prHorizontal
+	}
+	switch m := m.(type) {
+	case *image.Paletted:
+		photometricInterpretation = pPaletted
+		samplesPerPixel = 1
+		bitsPerSample = []uint32{8}
+		colorMap = make([]uint32, 256*3)
+		for i := 0; i < 256 && i < len(m.Palette); i++ {
+			r, g, b, _ := m.Palette[i].RGBA()
+			colorMap[i+0*256] = uint32(r)
+			colorMap[i+1*256] = uint32(g)
+			colorMap[i+2*256] = uint32(b)
+		}
+		err = encodeGray(dst, m.Pix, d.X, d.Y, m.Stride, predictor)
+	case *image.Gray:
+		photometricInterpretation = pBlackIsZero
+		samplesPerPixel = 1
+		bitsPerSample = []uint32{8}
+		err = encodeGray(dst, m.Pix, d.X, d.Y, m.Stride, predictor)
+	case *image.Gray16:
+		photometricInterpretation = pBlackIsZero
+		samplesPerPixel = 1
+		bitsPerSample = []uint32{16}
+		err = encodeGray16(dst, m.Pix, d.X, d.Y, m.Stride, predictor)
+	case *image.NRGBA:
+		extraSamples = 2 // Unassociated alpha.
+		err = encodeRGBA(dst, m.Pix, d.X, d.Y, m.Stride, predictor)
+	case *image.NRGBA64:
+		extraSamples = 2 // Unassociated alpha.
+		bitsPerSample = []uint32{16, 16, 16, 16}
+		err = encodeRGBA64(dst, m.Pix, d.X, d.Y, m.Stride, predictor)
+	case *image.RGBA:
+		extraSamples = 1 // Associated alpha.
+		err = encodeRGBA(dst, m.Pix, d.X, d.Y, m.Stride, predictor)
+	case *image.RGBA64:
+		extraSamples = 1 // Associated alpha.
+		bitsPerSample = []uint32{16, 16, 16, 16}
+		err = encodeRGBA64(dst, m.Pix, d.X, d.Y, m.Stride, predictor)
+	default:
+		extraSamples = 1 // Associated alpha.
+		err = encode(dst, m, predictor)
+	}
+	if err != nil {
+		return err
+	}
+
+	if compression != cNone {
+		if err = dst.(io.Closer).Close(); err != nil {
+			return err
+		}
+		imageLen = buf.Len()
+		if err = binary.Write(w, enc, uint32(imageLen+8)); err != nil {
+			return err
+		}
+		if _, err = buf.WriteTo(w); err != nil {
+			return err
+		}
+	}
+
+	ifd := []ifdEntry{
+		{tImageWidth, dtShort, []uint32{uint32(d.X)}},
+		{tImageLength, dtShort, []uint32{uint32(d.Y)}},
+		{tBitsPerSample, dtShort, bitsPerSample},
+		{tCompression, dtShort, []uint32{compression}},
+		{tPhotometricInterpretation, dtShort, []uint32{photometricInterpretation}},
+		{tStripOffsets, dtLong, []uint32{8}},
+		{tSamplesPerPixel, dtShort, []uint32{samplesPerPixel}},
+		{tRowsPerStrip, dtShort, []uint32{uint32(d.Y)}},
+		{tStripByteCounts, dtLong, []uint32{uint32(imageLen)}},
+		// There is currently no support for storing the image
+		// resolution, so give a bogus value of 72x72 dpi.
+		{tXResolution, dtRational, []uint32{72, 1}},
+		{tYResolution, dtRational, []uint32{72, 1}},
+		{tResolutionUnit, dtShort, []uint32{resPerInch}},
+	}
+	if pr != prNone {
+		ifd = append(ifd, ifdEntry{tPredictor, dtShort, []uint32{pr}})
+	}
+	if len(colorMap) != 0 {
+		ifd = append(ifd, ifdEntry{tColorMap, dtShort, colorMap})
+	}
+	if extraSamples > 0 {
+		ifd = append(ifd, ifdEntry{tExtraSamples, dtShort, []uint32{extraSamples}})
+	}
+
+	return writeIFD(w, imageLen+8, ifd)
+}

vendor/golang.org/x/sys/internal/unsafeheader/unsafeheader.go

@@ -1,30 +0,0 @@
-// Copyright 2020 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package unsafeheader contains header declarations for the Go runtime's
-// slice and string implementations.
-//
-// This package allows x/sys to use types equivalent to
-// reflect.SliceHeader and reflect.StringHeader without introducing
-// a dependency on the (relatively heavy) "reflect" package.
-package unsafeheader
-
-import (
-	"unsafe"
-)
-
-// Slice is the runtime representation of a slice.
-// It cannot be used safely or portably and its representation may change in a later release.
-type Slice struct {
-	Data unsafe.Pointer
-	Len  int
-	Cap  int
-}
-
-// String is the runtime representation of a string.
-// It cannot be used safely or portably and its representation may change in a later release.
-type String struct {
-	Data unsafe.Pointer
-	Len  int
-}

vendor/golang.org/x/sys/unix/.gitignore

@@ -1,2 +0,0 @@
-_obj/
-unix.test

vendor/golang.org/x/sys/unix/README.md

@@ -1,184 +0,0 @@
-# Building `sys/unix`
-
-The sys/unix package provides access to the raw system call interface of the
-underlying operating system. See: https://godoc.org/golang.org/x/sys/unix
-
-Porting Go to a new architecture/OS combination or adding syscalls, types, or
-constants to an existing architecture/OS pair requires some manual effort;
-however, there are tools that automate much of the process.
-
-## Build Systems
-
-There are currently two ways we generate the necessary files. We are currently
-migrating the build system to use containers so the builds are reproducible.
-This is being done on an OS-by-OS basis. Please update this documentation as
-components of the build system change.
-
-### Old Build System (currently for `GOOS != "linux"`)
-
-The old build system generates the Go files based on the C header files
-present on your system. This means that files
-for a given GOOS/GOARCH pair must be generated on a system with that OS and
-architecture. This also means that the generated code can differ from system
-to system, based on differences in the header files.
-
-To avoid this, if you are using the old build system, only generate the Go
-files on an installation with unmodified header files. It is also important to
-keep track of which version of the OS the files were generated from (ex.
-Darwin 14 vs Darwin 15). This makes it easier to track the progress of changes
-and have each OS upgrade correspond to a single change.
-
-To build the files for your current OS and architecture, make sure GOOS and
-GOARCH are set correctly and run `mkall.sh`. This will generate the files for
-your specific system. Running `mkall.sh -n` shows the commands that will be run.
-
-Requirements: bash, go
-
-### New Build System (currently for `GOOS == "linux"`)
-
-The new build system uses a Docker container to generate the go files directly
-from source checkouts of the kernel and various system libraries. This means
-that on any platform that supports Docker, all the files using the new build
-system can be generated at once, and generated files will not change based on
-what the person running the scripts has installed on their computer.
-
-The OS specific files for the new build system are located in the `${GOOS}`
-directory, and the build is coordinated by the `${GOOS}/mkall.go` program. When
-the kernel or system library updates, modify the Dockerfile at
-`${GOOS}/Dockerfile` to checkout the new release of the source.
-
-To build all the files under the new build system, you must be on an amd64/Linux
-system and have your GOOS and GOARCH set accordingly. Running `mkall.sh` will
-then generate all of the files for all of the GOOS/GOARCH pairs in the new build
-system. Running `mkall.sh -n` shows the commands that will be run.
-
-Requirements: bash, go, docker
-
-## Component files
-
-This section describes the various files used in the code generation process.
-It also contains instructions on how to modify these files to add a new
-architecture/OS or to add additional syscalls, types, or constants. Note that
-if you are using the new build system, the scripts/programs cannot be called normally.
-They must be called from within the docker container.
-
-### asm files
-
-The hand-written assembly file at `asm_${GOOS}_${GOARCH}.s` implements system
-call dispatch. There are three entry points:
-```
-  func Syscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
-  func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
-  func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
-```
-The first and second are the standard ones; they differ only in how many
-arguments can be passed to the kernel. The third is for low-level use by the
-ForkExec wrapper. Unlike the first two, it does not call into the scheduler to
-let it know that a system call is running.
-
-When porting Go to an new architecture/OS, this file must be implemented for
-each GOOS/GOARCH pair.
-
-### mksysnum
-
-Mksysnum is a Go program located at `${GOOS}/mksysnum.go` (or `mksysnum_${GOOS}.go`
-for the old system). This program takes in a list of header files containing the
-syscall number declarations and parses them to produce the corresponding list of
-Go numeric constants. See `zsysnum_${GOOS}_${GOARCH}.go` for the generated
-constants.
-
-Adding new syscall numbers is mostly done by running the build on a sufficiently
-new installation of the target OS (or updating the source checkouts for the
-new build system). However, depending on the OS, you may need to update the
-parsing in mksysnum.
-
-### mksyscall.go
-
-The `syscall.go`, `syscall_${GOOS}.go`, `syscall_${GOOS}_${GOARCH}.go` are
-hand-written Go files which implement system calls (for unix, the specific OS,
-or the specific OS/Architecture pair respectively) that need special handling
-and list `//sys` comments giving prototypes for ones that can be generated.
-
-The mksyscall.go program takes the `//sys` and `//sysnb` comments and converts
-them into syscalls. This requires the name of the prototype in the comment to
-match a syscall number in the `zsysnum_${GOOS}_${GOARCH}.go` file. The function
-prototype can be exported (capitalized) or not.
-
-Adding a new syscall often just requires adding a new `//sys` function prototype
-with the desired arguments and a capitalized name so it is exported. However, if
-you want the interface to the syscall to be different, often one will make an
-unexported `//sys` prototype, an then write a custom wrapper in
-`syscall_${GOOS}.go`.
-
-### types files
-
-For each OS, there is a hand-written Go file at `${GOOS}/types.go` (or
-`types_${GOOS}.go` on the old system). This file includes standard C headers and
-creates Go type aliases to the corresponding C types. The file is then fed
-through godef to get the Go compatible definitions. Finally, the generated code
-is fed though mkpost.go to format the code correctly and remove any hidden or
-private identifiers. This cleaned-up code is written to
-`ztypes_${GOOS}_${GOARCH}.go`.
-
-The hardest part about preparing this file is figuring out which headers to
-include and which symbols need to be `#define`d to get the actual data
-structures that pass through to the kernel system calls. Some C libraries
-preset alternate versions for binary compatibility and translate them on the
-way in and out of system calls, but there is almost always a `#define` that can
-get the real ones.
-See `types_darwin.go` and `linux/types.go` for examples.
-
-To add a new type, add in the necessary include statement at the top of the
-file (if it is not already there) and add in a type alias line. Note that if
-your type is significantly different on different architectures, you may need
-some `#if/#elif` macros in your include statements.
-
-### mkerrors.sh
-
-This script is used to generate the system's various constants. This doesn't
-just include the error numbers and error strings, but also the signal numbers
-an a wide variety of miscellaneous constants. The constants come from the list
-of include files in the `includes_${uname}` variable. A regex then picks out
-the desired `#define` statements, and generates the corresponding Go constants.
-The error numbers and strings are generated from `#include <errno.h>`, and the
-signal numbers and strings are generated from `#include <signal.h>`. All of
-these constants are written to `zerrors_${GOOS}_${GOARCH}.go` via a C program,
-`_errors.c`, which prints out all the constants.
-
-To add a constant, add the header that includes it to the appropriate variable.
-Then, edit the regex (if necessary) to match the desired constant. Avoid making
-the regex too broad to avoid matching unintended constants.
-
-### mkmerge.go
-
-This program is used to extract duplicate const, func, and type declarations
-from the generated architecture-specific files listed below, and merge these
-into a common file for each OS.
-
-The merge is performed in the following steps:
-1. Construct the set of common code that is idential in all architecture-specific files.
-2. Write this common code to the merged file.
-3. Remove the common code from all architecture-specific files.
-
-
-## Generated files
-
-### `zerrors_${GOOS}_${GOARCH}.go`
-
-A file containing all of the system's generated error numbers, error strings,
-signal numbers, and constants. Generated by `mkerrors.sh` (see above).
-
-### `zsyscall_${GOOS}_${GOARCH}.go`
-
-A file containing all the generated syscalls for a specific GOOS and GOARCH.
-Generated by `mksyscall.go` (see above).
-
-### `zsysnum_${GOOS}_${GOARCH}.go`
-
-A list of numeric constants for all the syscall number of the specific GOOS
-and GOARCH. Generated by mksysnum (see above).
-
-### `ztypes_${GOOS}_${GOARCH}.go`
-
-A file containing Go types for passing into (or returning from) syscalls.
-Generated by godefs and the types file (see above).

vendor/golang.org/x/sys/unix/affinity_linux.go

@@ -1,86 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// CPU affinity functions
-
-package unix
-
-import (
-	"math/bits"
-	"unsafe"
-)
-
-const cpuSetSize = _CPU_SETSIZE / _NCPUBITS
-
-// CPUSet represents a CPU affinity mask.
-type CPUSet [cpuSetSize]cpuMask
-
-func schedAffinity(trap uintptr, pid int, set *CPUSet) error {
-	_, _, e := RawSyscall(trap, uintptr(pid), uintptr(unsafe.Sizeof(*set)), uintptr(unsafe.Pointer(set)))
-	if e != 0 {
-		return errnoErr(e)
-	}
-	return nil
-}
-
-// SchedGetaffinity gets the CPU affinity mask of the thread specified by pid.
-// If pid is 0 the calling thread is used.
-func SchedGetaffinity(pid int, set *CPUSet) error {
-	return schedAffinity(SYS_SCHED_GETAFFINITY, pid, set)
-}
-
-// SchedSetaffinity sets the CPU affinity mask of the thread specified by pid.
-// If pid is 0 the calling thread is used.
-func SchedSetaffinity(pid int, set *CPUSet) error {
-	return schedAffinity(SYS_SCHED_SETAFFINITY, pid, set)
-}
-
-// Zero clears the set s, so that it contains no CPUs.
-func (s *CPUSet) Zero() {
-	for i := range s {
-		s[i] = 0
-	}
-}
-
-func cpuBitsIndex(cpu int) int {
-	return cpu / _NCPUBITS
-}
-
-func cpuBitsMask(cpu int) cpuMask {
-	return cpuMask(1 << (uint(cpu) % _NCPUBITS))
-}
-
-// Set adds cpu to the set s.
-func (s *CPUSet) Set(cpu int) {
-	i := cpuBitsIndex(cpu)
-	if i < len(s) {
-		s[i] |= cpuBitsMask(cpu)
-	}
-}
-
-// Clear removes cpu from the set s.
-func (s *CPUSet) Clear(cpu int) {
-	i := cpuBitsIndex(cpu)
-	if i < len(s) {
-		s[i] &^= cpuBitsMask(cpu)
-	}
-}
-
-// IsSet reports whether cpu is in the set s.
-func (s *CPUSet) IsSet(cpu int) bool {
-	i := cpuBitsIndex(cpu)
-	if i < len(s) {
-		return s[i]&cpuBitsMask(cpu) != 0
-	}
-	return false
-}
-
-// Count returns the number of CPUs in the set s.
-func (s *CPUSet) Count() int {
-	c := 0
-	for _, b := range s {
-		c += bits.OnesCount64(uint64(b))
-	}
-	return c
-}

vendor/golang.org/x/sys/unix/aliases.go

@@ -1,15 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build (aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos) && go1.9
-// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos
-// +build go1.9
-
-package unix
-
-import "syscall"
-
-type Signal = syscall.Signal
-type Errno = syscall.Errno
-type SysProcAttr = syscall.SysProcAttr

vendor/golang.org/x/sys/unix/asm_aix_ppc64.s

@@ -1,18 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build gc
-// +build gc
-
-#include "textflag.h"
-
-//
-// System calls for ppc64, AIX are implemented in runtime/syscall_aix.go
-//
-
-TEXT ·syscall6(SB),NOSPLIT,$0-88
-	JMP	syscall·syscall6(SB)
-
-TEXT ·rawSyscall6(SB),NOSPLIT,$0-88
-	JMP	syscall·rawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_bsd_386.s

@@ -1,29 +0,0 @@
-// Copyright 2021 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build (darwin || freebsd || netbsd || openbsd) && gc
-// +build darwin freebsd netbsd openbsd
-// +build gc
-
-#include "textflag.h"
-
-// System call support for 386 BSD
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-28
-	JMP	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-40
-	JMP	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-52
-	JMP	syscall·Syscall9(SB)
-
-TEXT	·RawSyscall(SB),NOSPLIT,$0-28
-	JMP	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
-	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_bsd_amd64.s

@@ -1,29 +0,0 @@
-// Copyright 2021 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build (darwin || dragonfly || freebsd || netbsd || openbsd) && gc
-// +build darwin dragonfly freebsd netbsd openbsd
-// +build gc
-
-#include "textflag.h"
-
-// System call support for AMD64 BSD
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-56
-	JMP	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-104
-	JMP	syscall·Syscall9(SB)
-
-TEXT	·RawSyscall(SB),NOSPLIT,$0-56
-	JMP	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_bsd_arm.s

@@ -1,29 +0,0 @@
-// Copyright 2021 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build (darwin || freebsd || netbsd || openbsd) && gc
-// +build darwin freebsd netbsd openbsd
-// +build gc
-
-#include "textflag.h"
-
-// System call support for ARM BSD
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-28
-	B	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-40
-	B	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-52
-	B	syscall·Syscall9(SB)
-
-TEXT	·RawSyscall(SB),NOSPLIT,$0-28
-	B	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
-	B	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_bsd_arm64.s

@@ -1,29 +0,0 @@
-// Copyright 2021 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build (darwin || freebsd || netbsd || openbsd) && gc
-// +build darwin freebsd netbsd openbsd
-// +build gc
-
-#include "textflag.h"
-
-// System call support for ARM64 BSD
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-56
-	JMP	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-104
-	JMP	syscall·Syscall9(SB)
-
-TEXT	·RawSyscall(SB),NOSPLIT,$0-56
-	JMP	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_linux_386.s

@@ -1,66 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build gc
-// +build gc
-
-#include "textflag.h"
-
-//
-// System calls for 386, Linux
-//
-
-// See ../runtime/sys_linux_386.s for the reason why we always use int 0x80
-// instead of the glibc-specific "CALL 0x10(GS)".
-#define INVOKE_SYSCALL	INT	$0x80
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT ·Syscall(SB),NOSPLIT,$0-28
-	JMP	syscall·Syscall(SB)
-
-TEXT ·Syscall6(SB),NOSPLIT,$0-40
-	JMP	syscall·Syscall6(SB)
-
-TEXT ·SyscallNoError(SB),NOSPLIT,$0-24
-	CALL	runtime·entersyscall(SB)
-	MOVL	trap+0(FP), AX  // syscall entry
-	MOVL	a1+4(FP), BX
-	MOVL	a2+8(FP), CX
-	MOVL	a3+12(FP), DX
-	MOVL	$0, SI
-	MOVL	$0, DI
-	INVOKE_SYSCALL
-	MOVL	AX, r1+16(FP)
-	MOVL	DX, r2+20(FP)
-	CALL	runtime·exitsyscall(SB)
-	RET
-
-TEXT ·RawSyscall(SB),NOSPLIT,$0-28
-	JMP	syscall·RawSyscall(SB)
-
-TEXT ·RawSyscall6(SB),NOSPLIT,$0-40
-	JMP	syscall·RawSyscall6(SB)
-
-TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-24
-	MOVL	trap+0(FP), AX  // syscall entry
-	MOVL	a1+4(FP), BX
-	MOVL	a2+8(FP), CX
-	MOVL	a3+12(FP), DX
-	MOVL	$0, SI
-	MOVL	$0, DI
-	INVOKE_SYSCALL
-	MOVL	AX, r1+16(FP)
-	MOVL	DX, r2+20(FP)
-	RET
-
-TEXT ·socketcall(SB),NOSPLIT,$0-36
-	JMP	syscall·socketcall(SB)
-
-TEXT ·rawsocketcall(SB),NOSPLIT,$0-36
-	JMP	syscall·rawsocketcall(SB)
-
-TEXT ·seek(SB),NOSPLIT,$0-28
-	JMP	syscall·seek(SB)

vendor/golang.org/x/sys/unix/asm_linux_amd64.s

@@ -1,58 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build gc
-// +build gc
-
-#include "textflag.h"
-
-//
-// System calls for AMD64, Linux
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT ·Syscall(SB),NOSPLIT,$0-56
-	JMP	syscall·Syscall(SB)
-
-TEXT ·Syscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·Syscall6(SB)
-
-TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
-	CALL	runtime·entersyscall(SB)
-	MOVQ	a1+8(FP), DI
-	MOVQ	a2+16(FP), SI
-	MOVQ	a3+24(FP), DX
-	MOVQ	$0, R10
-	MOVQ	$0, R8
-	MOVQ	$0, R9
-	MOVQ	trap+0(FP), AX	// syscall entry
-	SYSCALL
-	MOVQ	AX, r1+32(FP)
-	MOVQ	DX, r2+40(FP)
-	CALL	runtime·exitsyscall(SB)
-	RET
-
-TEXT ·RawSyscall(SB),NOSPLIT,$0-56
-	JMP	syscall·RawSyscall(SB)
-
-TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·RawSyscall6(SB)
-
-TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48
-	MOVQ	a1+8(FP), DI
-	MOVQ	a2+16(FP), SI
-	MOVQ	a3+24(FP), DX
-	MOVQ	$0, R10
-	MOVQ	$0, R8
-	MOVQ	$0, R9
-	MOVQ	trap+0(FP), AX	// syscall entry
-	SYSCALL
-	MOVQ	AX, r1+32(FP)
-	MOVQ	DX, r2+40(FP)
-	RET
-
-TEXT ·gettimeofday(SB),NOSPLIT,$0-16
-	JMP	syscall·gettimeofday(SB)

vendor/golang.org/x/sys/unix/asm_linux_arm.s

@@ -1,57 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build gc
-// +build gc
-
-#include "textflag.h"
-
-//
-// System calls for arm, Linux
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT ·Syscall(SB),NOSPLIT,$0-28
-	B	syscall·Syscall(SB)
-
-TEXT ·Syscall6(SB),NOSPLIT,$0-40
-	B	syscall·Syscall6(SB)
-
-TEXT ·SyscallNoError(SB),NOSPLIT,$0-24
-	BL	runtime·entersyscall(SB)
-	MOVW	trap+0(FP), R7
-	MOVW	a1+4(FP), R0
-	MOVW	a2+8(FP), R1
-	MOVW	a3+12(FP), R2
-	MOVW	$0, R3
-	MOVW	$0, R4
-	MOVW	$0, R5
-	SWI	$0
-	MOVW	R0, r1+16(FP)
-	MOVW	$0, R0
-	MOVW	R0, r2+20(FP)
-	BL	runtime·exitsyscall(SB)
-	RET
-
-TEXT ·RawSyscall(SB),NOSPLIT,$0-28
-	B	syscall·RawSyscall(SB)
-
-TEXT ·RawSyscall6(SB),NOSPLIT,$0-40
-	B	syscall·RawSyscall6(SB)
-
-TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-24
-	MOVW	trap+0(FP), R7	// syscall entry
-	MOVW	a1+4(FP), R0
-	MOVW	a2+8(FP), R1
-	MOVW	a3+12(FP), R2
-	SWI	$0
-	MOVW	R0, r1+16(FP)
-	MOVW	$0, R0
-	MOVW	R0, r2+20(FP)
-	RET
-
-TEXT ·seek(SB),NOSPLIT,$0-28
-	B	syscall·seek(SB)

vendor/golang.org/x/sys/unix/asm_linux_arm64.s

@@ -1,53 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build linux && arm64 && gc
-// +build linux
-// +build arm64
-// +build gc
-
-#include "textflag.h"
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT ·Syscall(SB),NOSPLIT,$0-56
-	B	syscall·Syscall(SB)
-
-TEXT ·Syscall6(SB),NOSPLIT,$0-80
-	B	syscall·Syscall6(SB)
-
-TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
-	BL	runtime·entersyscall(SB)
-	MOVD	a1+8(FP), R0
-	MOVD	a2+16(FP), R1
-	MOVD	a3+24(FP), R2
-	MOVD	$0, R3
-	MOVD	$0, R4
-	MOVD	$0, R5
-	MOVD	trap+0(FP), R8	// syscall entry
-	SVC
-	MOVD	R0, r1+32(FP)	// r1
-	MOVD	R1, r2+40(FP)	// r2
-	BL	runtime·exitsyscall(SB)
-	RET
-
-TEXT ·RawSyscall(SB),NOSPLIT,$0-56
-	B	syscall·RawSyscall(SB)
-
-TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
-	B	syscall·RawSyscall6(SB)
-
-TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48
-	MOVD	a1+8(FP), R0
-	MOVD	a2+16(FP), R1
-	MOVD	a3+24(FP), R2
-	MOVD	$0, R3
-	MOVD	$0, R4
-	MOVD	$0, R5
-	MOVD	trap+0(FP), R8	// syscall entry
-	SVC
-	MOVD	R0, r1+32(FP)
-	MOVD	R1, r2+40(FP)
-	RET

vendor/golang.org/x/sys/unix/asm_linux_mips64x.s

@@ -1,57 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build linux && (mips64 || mips64le) && gc
-// +build linux
-// +build mips64 mips64le
-// +build gc
-
-#include "textflag.h"
-
-//
-// System calls for mips64, Linux
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT ·Syscall(SB),NOSPLIT,$0-56
-	JMP	syscall·Syscall(SB)
-
-TEXT ·Syscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·Syscall6(SB)
-
-TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
-	JAL	runtime·entersyscall(SB)
-	MOVV	a1+8(FP), R4
-	MOVV	a2+16(FP), R5
-	MOVV	a3+24(FP), R6
-	MOVV	R0, R7
-	MOVV	R0, R8
-	MOVV	R0, R9
-	MOVV	trap+0(FP), R2	// syscall entry
-	SYSCALL
-	MOVV	R2, r1+32(FP)
-	MOVV	R3, r2+40(FP)
-	JAL	runtime·exitsyscall(SB)
-	RET
-
-TEXT ·RawSyscall(SB),NOSPLIT,$0-56
-	JMP	syscall·RawSyscall(SB)
-
-TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·RawSyscall6(SB)
-
-TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48
-	MOVV	a1+8(FP), R4
-	MOVV	a2+16(FP), R5
-	MOVV	a3+24(FP), R6
-	MOVV	R0, R7
-	MOVV	R0, R8
-	MOVV	R0, R9
-	MOVV	trap+0(FP), R2	// syscall entry
-	SYSCALL
-	MOVV	R2, r1+32(FP)
-	MOVV	R3, r2+40(FP)
-	RET

vendor/golang.org/x/sys/unix/asm_linux_mipsx.s

@@ -1,55 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build linux && (mips || mipsle) && gc
-// +build linux
-// +build mips mipsle
-// +build gc
-
-#include "textflag.h"
-
-//
-// System calls for mips, Linux
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT ·Syscall(SB),NOSPLIT,$0-28
-	JMP syscall·Syscall(SB)
-
-TEXT ·Syscall6(SB),NOSPLIT,$0-40
-	JMP syscall·Syscall6(SB)
-
-TEXT ·Syscall9(SB),NOSPLIT,$0-52
-	JMP syscall·Syscall9(SB)
-
-TEXT ·SyscallNoError(SB),NOSPLIT,$0-24
-	JAL	runtime·entersyscall(SB)
-	MOVW	a1+4(FP), R4
-	MOVW	a2+8(FP), R5
-	MOVW	a3+12(FP), R6
-	MOVW	R0, R7
-	MOVW	trap+0(FP), R2	// syscall entry
-	SYSCALL
-	MOVW	R2, r1+16(FP)	// r1
-	MOVW	R3, r2+20(FP)	// r2
-	JAL	runtime·exitsyscall(SB)
-	RET
-
-TEXT ·RawSyscall(SB),NOSPLIT,$0-28
-	JMP syscall·RawSyscall(SB)
-
-TEXT ·RawSyscall6(SB),NOSPLIT,$0-40
-	JMP syscall·RawSyscall6(SB)
-
-TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-24
-	MOVW	a1+4(FP), R4
-	MOVW	a2+8(FP), R5
-	MOVW	a3+12(FP), R6
-	MOVW	trap+0(FP), R2	// syscall entry
-	SYSCALL
-	MOVW	R2, r1+16(FP)
-	MOVW	R3, r2+20(FP)
-	RET

vendor/golang.org/x/sys/unix/asm_linux_ppc64x.s

@@ -1,45 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build linux && (ppc64 || ppc64le) && gc
-// +build linux
-// +build ppc64 ppc64le
-// +build gc
-
-#include "textflag.h"
-
-//
-// System calls for ppc64, Linux
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
-	BL	runtime·entersyscall(SB)
-	MOVD	a1+8(FP), R3
-	MOVD	a2+16(FP), R4
-	MOVD	a3+24(FP), R5
-	MOVD	R0, R6
-	MOVD	R0, R7
-	MOVD	R0, R8
-	MOVD	trap+0(FP), R9	// syscall entry
-	SYSCALL R9
-	MOVD	R3, r1+32(FP)
-	MOVD	R4, r2+40(FP)
-	BL	runtime·exitsyscall(SB)
-	RET
-
-TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48
-	MOVD	a1+8(FP), R3
-	MOVD	a2+16(FP), R4
-	MOVD	a3+24(FP), R5
-	MOVD	R0, R6
-	MOVD	R0, R7
-	MOVD	R0, R8
-	MOVD	trap+0(FP), R9	// syscall entry
-	SYSCALL R9
-	MOVD	R3, r1+32(FP)
-	MOVD	R4, r2+40(FP)
-	RET

vendor/golang.org/x/sys/unix/asm_linux_riscv64.s

@@ -1,49 +0,0 @@
-// Copyright 2019 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build riscv64 && gc
-// +build riscv64
-// +build gc
-
-#include "textflag.h"
-
-//
-// System calls for linux/riscv64.
-//
-// Where available, just jump to package syscall's implementation of
-// these functions.
-
-TEXT ·Syscall(SB),NOSPLIT,$0-56
-	JMP	syscall·Syscall(SB)
-
-TEXT ·Syscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·Syscall6(SB)
-
-TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
-	CALL	runtime·entersyscall(SB)
-	MOV	a1+8(FP), A0
-	MOV	a2+16(FP), A1
-	MOV	a3+24(FP), A2
-	MOV	trap+0(FP), A7	// syscall entry
-	ECALL
-	MOV	A0, r1+32(FP)	// r1
-	MOV	A1, r2+40(FP)	// r2
-	CALL	runtime·exitsyscall(SB)
-	RET
-
-TEXT ·RawSyscall(SB),NOSPLIT,$0-56
-	JMP	syscall·RawSyscall(SB)
-
-TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·RawSyscall6(SB)
-
-TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48
-	MOV	a1+8(FP), A0
-	MOV	a2+16(FP), A1
-	MOV	a3+24(FP), A2
-	MOV	trap+0(FP), A7	// syscall entry
-	ECALL
-	MOV	A0, r1+32(FP)
-	MOV	A1, r2+40(FP)
-	RET

vendor/golang.org/x/sys/unix/asm_linux_s390x.s

@@ -1,57 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build linux && s390x && gc
-// +build linux
-// +build s390x
-// +build gc
-
-#include "textflag.h"
-
-//
-// System calls for s390x, Linux
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT ·Syscall(SB),NOSPLIT,$0-56
-	BR	syscall·Syscall(SB)
-
-TEXT ·Syscall6(SB),NOSPLIT,$0-80
-	BR	syscall·Syscall6(SB)
-
-TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
-	BL	runtime·entersyscall(SB)
-	MOVD	a1+8(FP), R2
-	MOVD	a2+16(FP), R3
-	MOVD	a3+24(FP), R4
-	MOVD	$0, R5
-	MOVD	$0, R6
-	MOVD	$0, R7
-	MOVD	trap+0(FP), R1	// syscall entry
-	SYSCALL
-	MOVD	R2, r1+32(FP)
-	MOVD	R3, r2+40(FP)
-	BL	runtime·exitsyscall(SB)
-	RET
-
-TEXT ·RawSyscall(SB),NOSPLIT,$0-56
-	BR	syscall·RawSyscall(SB)
-
-TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
-	BR	syscall·RawSyscall6(SB)
-
-TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48
-	MOVD	a1+8(FP), R2
-	MOVD	a2+16(FP), R3
-	MOVD	a3+24(FP), R4
-	MOVD	$0, R5
-	MOVD	$0, R6
-	MOVD	$0, R7
-	MOVD	trap+0(FP), R1	// syscall entry
-	SYSCALL
-	MOVD	R2, r1+32(FP)
-	MOVD	R3, r2+40(FP)
-	RET

vendor/golang.org/x/sys/unix/asm_openbsd_mips64.s

@@ -1,30 +0,0 @@
-// Copyright 2019 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build gc
-// +build gc
-
-#include "textflag.h"
-
-//
-// System call support for mips64, OpenBSD
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-56
-	JMP	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-104
-	JMP	syscall·Syscall9(SB)
-
-TEXT	·RawSyscall(SB),NOSPLIT,$0-56
-	JMP	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_solaris_amd64.s

@@ -1,18 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build gc
-// +build gc
-
-#include "textflag.h"
-
-//
-// System calls for amd64, Solaris are implemented in runtime/syscall_solaris.go
-//
-
-TEXT ·sysvicall6(SB),NOSPLIT,$0-88
-	JMP	syscall·sysvicall6(SB)
-
-TEXT ·rawSysvicall6(SB),NOSPLIT,$0-88
-	JMP	syscall·rawSysvicall6(SB)

vendor/golang.org/x/sys/unix/asm_zos_s390x.s

@@ -1,426 +0,0 @@
-// Copyright 2020 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build zos && s390x && gc
-// +build zos
-// +build s390x
-// +build gc
-
-#include "textflag.h"
-
-#define PSALAA            1208(R0)
-#define GTAB64(x)           80(x)
-#define LCA64(x)            88(x)
-#define CAA(x)               8(x)
-#define EDCHPXV(x)        1016(x)       // in the CAA
-#define SAVSTACK_ASYNC(x)  336(x)       // in the LCA
-
-// SS_*, where x=SAVSTACK_ASYNC
-#define SS_LE(x)             0(x)
-#define SS_GO(x)             8(x)
-#define SS_ERRNO(x)         16(x)
-#define SS_ERRNOJR(x)       20(x)
-
-#define LE_CALL BYTE $0x0D; BYTE $0x76; // BL R7, R6
-
-TEXT ·clearErrno(SB),NOSPLIT,$0-0
-	BL	addrerrno<>(SB)
-	MOVD	$0, 0(R3)
-	RET
-
-// Returns the address of errno in R3.
-TEXT addrerrno<>(SB),NOSPLIT|NOFRAME,$0-0
-	// Get library control area (LCA).
-	MOVW	PSALAA, R8
-	MOVD	LCA64(R8), R8
-
-	// Get __errno FuncDesc.
-	MOVD	CAA(R8), R9
-	MOVD	EDCHPXV(R9), R9
-	ADD	$(0x156*16), R9
-	LMG	0(R9), R5, R6
-
-	// Switch to saved LE stack.
-	MOVD	SAVSTACK_ASYNC(R8), R9
-	MOVD	0(R9), R4
-	MOVD	$0, 0(R9)
-
-	// Call __errno function.
-	LE_CALL
-	NOPH
-
-	// Switch back to Go stack.
-	XOR	R0, R0      // Restore R0 to $0.
-	MOVD	R4, 0(R9)   // Save stack pointer.
-	RET
-
-TEXT ·syscall_syscall(SB),NOSPLIT,$0-56
-	BL	runtime·entersyscall(SB)
-	MOVD	a1+8(FP), R1
-	MOVD	a2+16(FP), R2
-	MOVD	a3+24(FP), R3
-
-	// Get library control area (LCA).
-	MOVW	PSALAA, R8
-	MOVD	LCA64(R8), R8
-
-	// Get function.
-	MOVD	CAA(R8), R9
-	MOVD	EDCHPXV(R9), R9
-	MOVD	trap+0(FP), R5
-	SLD	$4, R5
-	ADD	R5, R9
-	LMG	0(R9), R5, R6
-
-	// Restore LE stack.
-	MOVD	SAVSTACK_ASYNC(R8), R9
-	MOVD	0(R9), R4
-	MOVD	$0, 0(R9)
-
-	// Call function.
-	LE_CALL
-	NOPH
-	XOR	R0, R0      // Restore R0 to $0.
-	MOVD	R4, 0(R9)   // Save stack pointer.
-
-	MOVD	R3, r1+32(FP)
-	MOVD	R0, r2+40(FP)
-	MOVD	R0, err+48(FP)
-	MOVW	R3, R4
-	CMP	R4, $-1
-	BNE	done
-	BL	addrerrno<>(SB)
-	MOVWZ	0(R3), R3
-	MOVD	R3, err+48(FP)
-done:
-	BL	runtime·exitsyscall(SB)
-	RET
-
-TEXT ·syscall_rawsyscall(SB),NOSPLIT,$0-56
-	MOVD	a1+8(FP), R1
-	MOVD	a2+16(FP), R2
-	MOVD	a3+24(FP), R3
-
-	// Get library control area (LCA).
-	MOVW	PSALAA, R8
-	MOVD	LCA64(R8), R8
-
-	// Get function.
-	MOVD	CAA(R8), R9
-	MOVD	EDCHPXV(R9), R9
-	MOVD	trap+0(FP), R5
-	SLD	$4, R5
-	ADD	R5, R9
-	LMG	0(R9), R5, R6
-
-	// Restore LE stack.
-	MOVD	SAVSTACK_ASYNC(R8), R9
-	MOVD	0(R9), R4
-	MOVD	$0, 0(R9)
-
-	// Call function.
-	LE_CALL
-	NOPH
-	XOR	R0, R0      // Restore R0 to $0.
-	MOVD	R4, 0(R9)   // Save stack pointer.
-
-	MOVD	R3, r1+32(FP)
-	MOVD	R0, r2+40(FP)
-	MOVD	R0, err+48(FP)
-	MOVW	R3, R4
-	CMP	R4, $-1
-	BNE	done
-	BL	addrerrno<>(SB)
-	MOVWZ	0(R3), R3
-	MOVD	R3, err+48(FP)
-done:
-	RET
-
-TEXT ·syscall_syscall6(SB),NOSPLIT,$0-80
-	BL	runtime·entersyscall(SB)
-	MOVD	a1+8(FP), R1
-	MOVD	a2+16(FP), R2
-	MOVD	a3+24(FP), R3
-
-	// Get library control area (LCA).
-	MOVW	PSALAA, R8
-	MOVD	LCA64(R8), R8
-
-	// Get function.
-	MOVD	CAA(R8), R9
-	MOVD	EDCHPXV(R9), R9
-	MOVD	trap+0(FP), R5
-	SLD	$4, R5
-	ADD	R5, R9
-	LMG	0(R9), R5, R6
-
-	// Restore LE stack.
-	MOVD	SAVSTACK_ASYNC(R8), R9
-	MOVD	0(R9), R4
-	MOVD	$0, 0(R9)
-
-	// Fill in parameter list.
-	MOVD	a4+32(FP), R12
-	MOVD	R12, (2176+24)(R4)
-	MOVD	a5+40(FP), R12
-	MOVD	R12, (2176+32)(R4)
-	MOVD	a6+48(FP), R12
-	MOVD	R12, (2176+40)(R4)
-
-	// Call function.
-	LE_CALL
-	NOPH
-	XOR	R0, R0      // Restore R0 to $0.
-	MOVD	R4, 0(R9)   // Save stack pointer.
-
-	MOVD	R3, r1+56(FP)
-	MOVD	R0, r2+64(FP)
-	MOVD	R0, err+72(FP)
-	MOVW	R3, R4
-	CMP	R4, $-1
-	BNE	done
-	BL	addrerrno<>(SB)
-	MOVWZ	0(R3), R3
-	MOVD	R3, err+72(FP)
-done:
-	BL	runtime·exitsyscall(SB)
-	RET
-
-TEXT ·syscall_rawsyscall6(SB),NOSPLIT,$0-80
-	MOVD	a1+8(FP), R1
-	MOVD	a2+16(FP), R2
-	MOVD	a3+24(FP), R3
-
-	// Get library control area (LCA).
-	MOVW	PSALAA, R8
-	MOVD	LCA64(R8), R8
-
-	// Get function.
-	MOVD	CAA(R8), R9
-	MOVD	EDCHPXV(R9), R9
-	MOVD	trap+0(FP), R5
-	SLD	$4, R5
-	ADD	R5, R9
-	LMG	0(R9), R5, R6
-
-	// Restore LE stack.
-	MOVD	SAVSTACK_ASYNC(R8), R9
-	MOVD	0(R9), R4
-	MOVD	$0, 0(R9)
-
-	// Fill in parameter list.
-	MOVD	a4+32(FP), R12
-	MOVD	R12, (2176+24)(R4)
-	MOVD	a5+40(FP), R12
-	MOVD	R12, (2176+32)(R4)
-	MOVD	a6+48(FP), R12
-	MOVD	R12, (2176+40)(R4)
-
-	// Call function.
-	LE_CALL
-	NOPH
-	XOR	R0, R0      // Restore R0 to $0.
-	MOVD	R4, 0(R9)   // Save stack pointer.
-
-	MOVD	R3, r1+56(FP)
-	MOVD	R0, r2+64(FP)
-	MOVD	R0, err+72(FP)
-	MOVW	R3, R4
-	CMP	R4, $-1
-	BNE	done
-	BL	·rrno<>(SB)
-	MOVWZ	0(R3), R3
-	MOVD	R3, err+72(FP)
-done:
-	RET
-
-TEXT ·syscall_syscall9(SB),NOSPLIT,$0
-	BL	runtime·entersyscall(SB)
-	MOVD	a1+8(FP), R1
-	MOVD	a2+16(FP), R2
-	MOVD	a3+24(FP), R3
-
-	// Get library control area (LCA).
-	MOVW	PSALAA, R8
-	MOVD	LCA64(R8), R8
-
-	// Get function.
-	MOVD	CAA(R8), R9
-	MOVD	EDCHPXV(R9), R9
-	MOVD	trap+0(FP), R5
-	SLD	$4, R5
-	ADD	R5, R9
-	LMG	0(R9), R5, R6
-
-	// Restore LE stack.
-	MOVD	SAVSTACK_ASYNC(R8), R9
-	MOVD	0(R9), R4
-	MOVD	$0, 0(R9)
-
-	// Fill in parameter list.
-	MOVD	a4+32(FP), R12
-	MOVD	R12, (2176+24)(R4)
-	MOVD	a5+40(FP), R12
-	MOVD	R12, (2176+32)(R4)
-	MOVD	a6+48(FP), R12
-	MOVD	R12, (2176+40)(R4)
-	MOVD	a7+56(FP), R12
-	MOVD	R12, (2176+48)(R4)
-	MOVD	a8+64(FP), R12
-	MOVD	R12, (2176+56)(R4)
-	MOVD	a9+72(FP), R12
-	MOVD	R12, (2176+64)(R4)
-
-	// Call function.
-	LE_CALL
-	NOPH
-	XOR	R0, R0      // Restore R0 to $0.
-	MOVD	R4, 0(R9)   // Save stack pointer.
-
-	MOVD	R3, r1+80(FP)
-	MOVD	R0, r2+88(FP)
-	MOVD	R0, err+96(FP)
-	MOVW	R3, R4
-	CMP	R4, $-1
-	BNE	done
-	BL	addrerrno<>(SB)
-	MOVWZ	0(R3), R3
-	MOVD	R3, err+96(FP)
-done:
-        BL	runtime·exitsyscall(SB)
-        RET
-
-TEXT ·syscall_rawsyscall9(SB),NOSPLIT,$0
-	MOVD	a1+8(FP), R1
-	MOVD	a2+16(FP), R2
-	MOVD	a3+24(FP), R3
-
-	// Get library control area (LCA).
-	MOVW	PSALAA, R8
-	MOVD	LCA64(R8), R8
-
-	// Get function.
-	MOVD	CAA(R8), R9
-	MOVD	EDCHPXV(R9), R9
-	MOVD	trap+0(FP), R5
-	SLD	$4, R5
-	ADD	R5, R9
-	LMG	0(R9), R5, R6
-
-	// Restore LE stack.
-	MOVD	SAVSTACK_ASYNC(R8), R9
-	MOVD	0(R9), R4
-	MOVD	$0, 0(R9)
-
-	// Fill in parameter list.
-	MOVD	a4+32(FP), R12
-	MOVD	R12, (2176+24)(R4)
-	MOVD	a5+40(FP), R12
-	MOVD	R12, (2176+32)(R4)
-	MOVD	a6+48(FP), R12
-	MOVD	R12, (2176+40)(R4)
-	MOVD	a7+56(FP), R12
-	MOVD	R12, (2176+48)(R4)
-	MOVD	a8+64(FP), R12
-	MOVD	R12, (2176+56)(R4)
-	MOVD	a9+72(FP), R12
-	MOVD	R12, (2176+64)(R4)
-
-	// Call function.
-	LE_CALL
-	NOPH
-	XOR	R0, R0      // Restore R0 to $0.
-	MOVD	R4, 0(R9)   // Save stack pointer.
-
-	MOVD	R3, r1+80(FP)
-	MOVD	R0, r2+88(FP)
-	MOVD	R0, err+96(FP)
-	MOVW	R3, R4
-	CMP	R4, $-1
-	BNE	done
-	BL	addrerrno<>(SB)
-	MOVWZ	0(R3), R3
-	MOVD	R3, err+96(FP)
-done:
-	RET
-
-// func svcCall(fnptr unsafe.Pointer, argv *unsafe.Pointer, dsa *uint64)
-TEXT ·svcCall(SB),NOSPLIT,$0
-	BL	runtime·save_g(SB)   // Save g and stack pointer
-	MOVW	PSALAA, R8
-	MOVD	LCA64(R8), R8
-	MOVD	SAVSTACK_ASYNC(R8), R9
-	MOVD	R15, 0(R9)
-
-	MOVD	argv+8(FP), R1       // Move function arguments into registers
-	MOVD	dsa+16(FP), g
-	MOVD	fnptr+0(FP), R15
-
-	BYTE	$0x0D                // Branch to function
-	BYTE	$0xEF
-
-	BL	runtime·load_g(SB)   // Restore g and stack pointer
-	MOVW	PSALAA, R8
-	MOVD	LCA64(R8), R8
-	MOVD	SAVSTACK_ASYNC(R8), R9
-	MOVD	0(R9), R15
-
-	RET
-
-// func svcLoad(name *byte) unsafe.Pointer
-TEXT ·svcLoad(SB),NOSPLIT,$0
-	MOVD	R15, R2          // Save go stack pointer
-	MOVD	name+0(FP), R0   // Move SVC args into registers
-	MOVD	$0x80000000, R1
-	MOVD	$0, R15
-	BYTE	$0x0A            // SVC 08 LOAD
-	BYTE	$0x08
-	MOVW	R15, R3          // Save return code from SVC
-	MOVD	R2, R15          // Restore go stack pointer
-	CMP	R3, $0           // Check SVC return code
-	BNE	error
-
-	MOVD	$-2, R3          // Reset last bit of entry point to zero
-	AND	R0, R3
-	MOVD	R3, addr+8(FP)   // Return entry point returned by SVC
-	CMP	R0, R3           // Check if last bit of entry point was set
-	BNE	done
-
-	MOVD	R15, R2          // Save go stack pointer
-	MOVD	$0, R15          // Move SVC args into registers (entry point still in r0 from SVC 08)
-	BYTE	$0x0A            // SVC 09 DELETE
-	BYTE	$0x09
-	MOVD	R2, R15          // Restore go stack pointer
-
-error:
-	MOVD	$0, addr+8(FP)   // Return 0 on failure
-done:
-	XOR	R0, R0           // Reset r0 to 0
-	RET
-
-// func svcUnload(name *byte, fnptr unsafe.Pointer) int64
-TEXT ·svcUnload(SB),NOSPLIT,$0
-	MOVD	R15, R2          // Save go stack pointer
-	MOVD	name+0(FP), R0   // Move SVC args into registers
-	MOVD	addr+8(FP), R15
-	BYTE	$0x0A            // SVC 09
-	BYTE	$0x09
-	XOR	R0, R0           // Reset r0 to 0
-	MOVD	R15, R1          // Save SVC return code
-	MOVD	R2, R15          // Restore go stack pointer
-	MOVD	R1, rc+0(FP)     // Return SVC return code
-	RET
-
-// func gettid() uint64
-TEXT ·gettid(SB), NOSPLIT, $0
-	// Get library control area (LCA).
-	MOVW PSALAA, R8
-	MOVD LCA64(R8), R8
-
-	// Get CEECAATHDID
-	MOVD CAA(R8), R9
-	MOVD 0x3D0(R9), R9
-	MOVD R9, ret+0(FP)
-
-	RET

vendor/golang.org/x/sys/unix/bluetooth_linux.go

@@ -1,36 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Bluetooth sockets and messages
-
-package unix
-
-// Bluetooth Protocols
-const (
-	BTPROTO_L2CAP  = 0
-	BTPROTO_HCI    = 1
-	BTPROTO_SCO    = 2
-	BTPROTO_RFCOMM = 3
-	BTPROTO_BNEP   = 4
-	BTPROTO_CMTP   = 5
-	BTPROTO_HIDP   = 6
-	BTPROTO_AVDTP  = 7
-)
-
-const (
-	HCI_CHANNEL_RAW     = 0
-	HCI_CHANNEL_USER    = 1
-	HCI_CHANNEL_MONITOR = 2
-	HCI_CHANNEL_CONTROL = 3
-	HCI_CHANNEL_LOGGING = 4
-)
-
-// Socketoption Level
-const (
-	SOL_BLUETOOTH = 0x112
-	SOL_HCI       = 0x0
-	SOL_L2CAP     = 0x6
-	SOL_RFCOMM    = 0x12
-	SOL_SCO       = 0x11
-)

vendor/golang.org/x/sys/unix/cap_freebsd.go

@@ -1,196 +0,0 @@
-// Copyright 2017 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build freebsd
-// +build freebsd
-
-package unix
-
-import (
-	"errors"
-	"fmt"
-)
-
-// Go implementation of C mostly found in /usr/src/sys/kern/subr_capability.c
-
-const (
-	// This is the version of CapRights this package understands. See C implementation for parallels.
-	capRightsGoVersion = CAP_RIGHTS_VERSION_00
-	capArSizeMin       = CAP_RIGHTS_VERSION_00 + 2
-	capArSizeMax       = capRightsGoVersion + 2
-)
-
-var (
-	bit2idx = []int{
-		-1, 0, 1, -1, 2, -1, -1, -1, 3, -1, -1, -1, -1, -1, -1, -1,
-		4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-	}
-)
-
-func capidxbit(right uint64) int {
-	return int((right >> 57) & 0x1f)
-}
-
-func rightToIndex(right uint64) (int, error) {
-	idx := capidxbit(right)
-	if idx < 0 || idx >= len(bit2idx) {
-		return -2, fmt.Errorf("index for right 0x%x out of range", right)
-	}
-	return bit2idx[idx], nil
-}
-
-func caprver(right uint64) int {
-	return int(right >> 62)
-}
-
-func capver(rights *CapRights) int {
-	return caprver(rights.Rights[0])
-}
-
-func caparsize(rights *CapRights) int {
-	return capver(rights) + 2
-}
-
-// CapRightsSet sets the permissions in setrights in rights.
-func CapRightsSet(rights *CapRights, setrights []uint64) error {
-	// This is essentially a copy of cap_rights_vset()
-	if capver(rights) != CAP_RIGHTS_VERSION_00 {
-		return fmt.Errorf("bad rights version %d", capver(rights))
-	}
-
-	n := caparsize(rights)
-	if n < capArSizeMin || n > capArSizeMax {
-		return errors.New("bad rights size")
-	}
-
-	for _, right := range setrights {
-		if caprver(right) != CAP_RIGHTS_VERSION_00 {
-			return errors.New("bad right version")
-		}
-		i, err := rightToIndex(right)
-		if err != nil {
-			return err
-		}
-		if i >= n {
-			return errors.New("index overflow")
-		}
-		if capidxbit(rights.Rights[i]) != capidxbit(right) {
-			return errors.New("index mismatch")
-		}
-		rights.Rights[i] |= right
-		if capidxbit(rights.Rights[i]) != capidxbit(right) {
-			return errors.New("index mismatch (after assign)")
-		}
-	}
-
-	return nil
-}
-
-// CapRightsClear clears the permissions in clearrights from rights.
-func CapRightsClear(rights *CapRights, clearrights []uint64) error {
-	// This is essentially a copy of cap_rights_vclear()
-	if capver(rights) != CAP_RIGHTS_VERSION_00 {
-		return fmt.Errorf("bad rights version %d", capver(rights))
-	}
-
-	n := caparsize(rights)
-	if n < capArSizeMin || n > capArSizeMax {
-		return errors.New("bad rights size")
-	}
-
-	for _, right := range clearrights {
-		if caprver(right) != CAP_RIGHTS_VERSION_00 {
-			return errors.New("bad right version")
-		}
-		i, err := rightToIndex(right)
-		if err != nil {
-			return err
-		}
-		if i >= n {
-			return errors.New("index overflow")
-		}
-		if capidxbit(rights.Rights[i]) != capidxbit(right) {
-			return errors.New("index mismatch")
-		}
-		rights.Rights[i] &= ^(right & 0x01FFFFFFFFFFFFFF)
-		if capidxbit(rights.Rights[i]) != capidxbit(right) {
-			return errors.New("index mismatch (after assign)")
-		}
-	}
-
-	return nil
-}
-
-// CapRightsIsSet checks whether all the permissions in setrights are present in rights.
-func CapRightsIsSet(rights *CapRights, setrights []uint64) (bool, error) {
-	// This is essentially a copy of cap_rights_is_vset()
-	if capver(rights) != CAP_RIGHTS_VERSION_00 {
-		return false, fmt.Errorf("bad rights version %d", capver(rights))
-	}
-
-	n := caparsize(rights)
-	if n < capArSizeMin || n > capArSizeMax {
-		return false, errors.New("bad rights size")
-	}
-
-	for _, right := range setrights {
-		if caprver(right) != CAP_RIGHTS_VERSION_00 {
-			return false, errors.New("bad right version")
-		}
-		i, err := rightToIndex(right)
-		if err != nil {
-			return false, err
-		}
-		if i >= n {
-			return false, errors.New("index overflow")
-		}
-		if capidxbit(rights.Rights[i]) != capidxbit(right) {
-			return false, errors.New("index mismatch")
-		}
-		if (rights.Rights[i] & right) != right {
-			return false, nil
-		}
-	}
-
-	return true, nil
-}
-
-func capright(idx uint64, bit uint64) uint64 {
-	return ((1 << (57 + idx)) | bit)
-}
-
-// CapRightsInit returns a pointer to an initialised CapRights structure filled with rights.
-// See man cap_rights_init(3) and rights(4).
-func CapRightsInit(rights []uint64) (*CapRights, error) {
-	var r CapRights
-	r.Rights[0] = (capRightsGoVersion << 62) | capright(0, 0)
-	r.Rights[1] = capright(1, 0)
-
-	err := CapRightsSet(&r, rights)
-	if err != nil {
-		return nil, err
-	}
-	return &r, nil
-}
-
-// CapRightsLimit reduces the operations permitted on fd to at most those contained in rights.
-// The capability rights on fd can never be increased by CapRightsLimit.
-// See man cap_rights_limit(2) and rights(4).
-func CapRightsLimit(fd uintptr, rights *CapRights) error {
-	return capRightsLimit(int(fd), rights)
-}
-
-// CapRightsGet returns a CapRights structure containing the operations permitted on fd.
-// See man cap_rights_get(3) and rights(4).
-func CapRightsGet(fd uintptr) (*CapRights, error) {
-	r, err := CapRightsInit(nil)
-	if err != nil {
-		return nil, err
-	}
-	err = capRightsGet(capRightsGoVersion, int(fd), r)
-	if err != nil {
-		return nil, err
-	}
-	return r, nil
-}

vendor/golang.org/x/sys/unix/constants.go

@@ -1,14 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
-// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos
-
-package unix
-
-const (
-	R_OK = 0x4
-	W_OK = 0x2
-	X_OK = 0x1
-)

vendor/golang.org/x/sys/unix/dev_aix_ppc.go

@@ -1,27 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build aix && ppc
-// +build aix,ppc
-
-// Functions to access/create device major and minor numbers matching the
-// encoding used by AIX.
-
-package unix
-
-// Major returns the major component of a Linux device number.
-func Major(dev uint64) uint32 {
-	return uint32((dev >> 16) & 0xffff)
-}
-
-// Minor returns the minor component of a Linux device number.
-func Minor(dev uint64) uint32 {
-	return uint32(dev & 0xffff)
-}
-
-// Mkdev returns a Linux device number generated from the given major and minor
-// components.
-func Mkdev(major, minor uint32) uint64 {
-	return uint64(((major) << 16) | (minor))
-}

vendor/golang.org/x/sys/unix/dev_aix_ppc64.go

@@ -1,29 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build aix && ppc64
-// +build aix,ppc64
-
-// Functions to access/create device major and minor numbers matching the
-// encoding used AIX.
-
-package unix
-
-// Major returns the major component of a Linux device number.
-func Major(dev uint64) uint32 {
-	return uint32((dev & 0x3fffffff00000000) >> 32)
-}
-
-// Minor returns the minor component of a Linux device number.
-func Minor(dev uint64) uint32 {
-	return uint32((dev & 0x00000000ffffffff) >> 0)
-}
-
-// Mkdev returns a Linux device number generated from the given major and minor
-// components.
-func Mkdev(major, minor uint32) uint64 {
-	var DEVNO64 uint64
-	DEVNO64 = 0x8000000000000000
-	return ((uint64(major) << 32) | (uint64(minor) & 0x00000000FFFFFFFF) | DEVNO64)
-}

vendor/golang.org/x/sys/unix/dev_darwin.go

@@ -1,24 +0,0 @@
-// Copyright 2017 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Functions to access/create device major and minor numbers matching the
-// encoding used in Darwin's sys/types.h header.
-
-package unix
-
-// Major returns the major component of a Darwin device number.
-func Major(dev uint64) uint32 {
-	return uint32((dev >> 24) & 0xff)
-}
-
-// Minor returns the minor component of a Darwin device number.
-func Minor(dev uint64) uint32 {
-	return uint32(dev & 0xffffff)
-}
-
-// Mkdev returns a Darwin device number generated from the given major and minor
-// components.
-func Mkdev(major, minor uint32) uint64 {
-	return (uint64(major) << 24) | uint64(minor)
-}

vendor/golang.org/x/sys/unix/dev_dragonfly.go

@@ -1,30 +0,0 @@
-// Copyright 2017 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Functions to access/create device major and minor numbers matching the
-// encoding used in Dragonfly's sys/types.h header.
-//
-// The information below is extracted and adapted from sys/types.h:
-//
-// Minor gives a cookie instead of an index since in order to avoid changing the
-// meanings of bits 0-15 or wasting time and space shifting bits 16-31 for
-// devices that don't use them.
-
-package unix
-
-// Major returns the major component of a DragonFlyBSD device number.
-func Major(dev uint64) uint32 {
-	return uint32((dev >> 8) & 0xff)
-}
-
-// Minor returns the minor component of a DragonFlyBSD device number.
-func Minor(dev uint64) uint32 {
-	return uint32(dev & 0xffff00ff)
-}
-
-// Mkdev returns a DragonFlyBSD device number generated from the given major and
-// minor components.
-func Mkdev(major, minor uint32) uint64 {
-	return (uint64(major) << 8) | uint64(minor)
-}

vendor/golang.org/x/sys/unix/dev_freebsd.go

@@ -1,30 +0,0 @@
-// Copyright 2017 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Functions to access/create device major and minor numbers matching the
-// encoding used in FreeBSD's sys/types.h header.
-//
-// The information below is extracted and adapted from sys/types.h:
-//
-// Minor gives a cookie instead of an index since in order to avoid changing the
-// meanings of bits 0-15 or wasting time and space shifting bits 16-31 for
-// devices that don't use them.
-
-package unix
-
-// Major returns the major component of a FreeBSD device number.
-func Major(dev uint64) uint32 {
-	return uint32((dev >> 8) & 0xff)
-}
-
-// Minor returns the minor component of a FreeBSD device number.
-func Minor(dev uint64) uint32 {
-	return uint32(dev & 0xffff00ff)
-}
-
-// Mkdev returns a FreeBSD device number generated from the given major and
-// minor components.
-func Mkdev(major, minor uint32) uint64 {
-	return (uint64(major) << 8) | uint64(minor)
-}