362 lines
10 KiB
Go
362 lines
10 KiB
Go
package gocv
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/*
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#include <stdlib.h>
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#include "highgui_gocv.h"
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*/
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import "C"
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import (
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"image"
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"runtime"
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"unsafe"
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)
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// Window is a wrapper around OpenCV's "HighGUI" named windows.
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// While OpenCV was designed for use in full-scale applications and can be used
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// within functionally rich UI frameworks (such as Qt*, WinForms*, or Cocoa*)
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// or without any UI at all, sometimes there it is required to try functionality
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// quickly and visualize the results. This is what the HighGUI module has been designed for.
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//
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// For further details, please see:
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// http://docs.opencv.org/master/d7/dfc/group__highgui.html
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//
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type Window struct {
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name string
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open bool
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}
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// NewWindow creates a new named OpenCV window
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//
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// For further details, please see:
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// http://docs.opencv.org/master/d7/dfc/group__highgui.html#ga5afdf8410934fd099df85c75b2e0888b
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//
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func NewWindow(name string) *Window {
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runtime.LockOSThread()
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cName := C.CString(name)
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defer C.free(unsafe.Pointer(cName))
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C.Window_New(cName, 0)
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return &Window{name: name, open: true}
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}
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// Close closes and deletes a named OpenCV Window.
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//
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// For further details, please see:
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// http://docs.opencv.org/master/d7/dfc/group__highgui.html#ga851ccdd6961022d1d5b4c4f255dbab34
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//
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func (w *Window) Close() error {
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cName := C.CString(w.name)
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defer C.free(unsafe.Pointer(cName))
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C.Window_Close(cName)
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w.open = false
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runtime.UnlockOSThread()
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return nil
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}
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// IsOpen checks to see if the Window seems to be open.
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func (w *Window) IsOpen() bool {
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return w.open
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}
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// WindowFlag value for SetWindowProperty / GetWindowProperty.
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type WindowFlag float32
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const (
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// WindowNormal indicates a normal window.
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WindowNormal WindowFlag = 0x00000000
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// WindowAutosize indicates a window sized based on the contents.
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WindowAutosize WindowFlag = 0x00000001
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// WindowFullscreen indicates a full-screen window.
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WindowFullscreen WindowFlag = 1
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// WindowFreeRatio indicates allow the user to resize without maintaining aspect ratio.
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WindowFreeRatio WindowFlag = 0x00000100
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// WindowKeepRatio indicates always maintain an aspect ratio that matches the contents.
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WindowKeepRatio WindowFlag = 0x00000000
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)
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// WindowPropertyFlag flags for SetWindowProperty / GetWindowProperty.
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type WindowPropertyFlag int
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const (
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// WindowPropertyFullscreen fullscreen property
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// (can be WINDOW_NORMAL or WINDOW_FULLSCREEN).
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WindowPropertyFullscreen WindowPropertyFlag = 0
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// WindowPropertyAutosize is autosize property
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// (can be WINDOW_NORMAL or WINDOW_AUTOSIZE).
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WindowPropertyAutosize WindowPropertyFlag = 1
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// WindowPropertyAspectRatio window's aspect ration
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// (can be set to WINDOW_FREERATIO or WINDOW_KEEPRATIO).
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WindowPropertyAspectRatio WindowPropertyFlag = 2
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// WindowPropertyOpenGL opengl support.
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WindowPropertyOpenGL WindowPropertyFlag = 3
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// WindowPropertyVisible or not.
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WindowPropertyVisible WindowPropertyFlag = 4
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)
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// GetWindowProperty returns properties of a window.
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//
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// For further details, please see:
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// https://docs.opencv.org/master/d7/dfc/group__highgui.html#gaaf9504b8f9cf19024d9d44a14e461656
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//
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func (w *Window) GetWindowProperty(flag WindowPropertyFlag) float64 {
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cName := C.CString(w.name)
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defer C.free(unsafe.Pointer(cName))
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return float64(C.Window_GetProperty(cName, C.int(flag)))
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}
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// SetWindowProperty changes parameters of a window dynamically.
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//
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// For further details, please see:
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// https://docs.opencv.org/master/d7/dfc/group__highgui.html#ga66e4a6db4d4e06148bcdfe0d70a5df27
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//
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func (w *Window) SetWindowProperty(flag WindowPropertyFlag, value WindowFlag) {
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cName := C.CString(w.name)
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defer C.free(unsafe.Pointer(cName))
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C.Window_SetProperty(cName, C.int(flag), C.double(value))
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}
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// SetWindowTitle updates window title.
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//
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// For further details, please see:
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// https://docs.opencv.org/master/d7/dfc/group__highgui.html#ga56f8849295fd10d0c319724ddb773d96
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//
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func (w *Window) SetWindowTitle(title string) {
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cName := C.CString(w.name)
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defer C.free(unsafe.Pointer(cName))
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cTitle := C.CString(title)
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defer C.free(unsafe.Pointer(cTitle))
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C.Window_SetTitle(cName, cTitle)
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}
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// IMShow displays an image Mat in the specified window.
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// This function should be followed by the WaitKey function which displays
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// the image for specified milliseconds. Otherwise, it won't display the image.
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//
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// For further details, please see:
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// http://docs.opencv.org/master/d7/dfc/group__highgui.html#ga453d42fe4cb60e5723281a89973ee563
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//
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func (w *Window) IMShow(img Mat) {
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cName := C.CString(w.name)
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defer C.free(unsafe.Pointer(cName))
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C.Window_IMShow(cName, img.p)
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}
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// WaitKey waits for a pressed key.
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// This function is the only method in OpenCV's HighGUI that can fetch
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// and handle events, so it needs to be called periodically
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// for normal event processing
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//
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// For further details, please see:
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// http://docs.opencv.org/master/d7/dfc/group__highgui.html#ga5628525ad33f52eab17feebcfba38bd7
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//
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func (w *Window) WaitKey(delay int) int {
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return int(C.Window_WaitKey(C.int(delay)))
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}
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// MoveWindow moves window to the specified position.
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//
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// For further details, please see:
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// https://docs.opencv.org/master/d7/dfc/group__highgui.html#ga8d86b207f7211250dbe6e28f76307ffb
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//
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func (w *Window) MoveWindow(x, y int) {
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cName := C.CString(w.name)
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defer C.free(unsafe.Pointer(cName))
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C.Window_Move(cName, C.int(x), C.int(y))
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}
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// ResizeWindow resizes window to the specified size.
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//
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// For further details, please see:
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// https://docs.opencv.org/master/d7/dfc/group__highgui.html#ga9e80e080f7ef33f897e415358aee7f7e
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//
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func (w *Window) ResizeWindow(width, height int) {
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cName := C.CString(w.name)
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defer C.free(unsafe.Pointer(cName))
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C.Window_Resize(cName, C.int(width), C.int(height))
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}
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// SelectROI selects a Region Of Interest (ROI) on the given image.
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// It creates a window and allows user to select a ROI using mouse.
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//
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// Controls:
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// use space or enter to finish selection,
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// use key c to cancel selection (function will return a zero Rect).
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//
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// For further details, please see:
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// https://docs.opencv.org/master/d7/dfc/group__highgui.html#ga8daf4730d3adf7035b6de9be4c469af5
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//
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func (w *Window) SelectROI(img Mat) image.Rectangle {
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cName := C.CString(w.name)
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defer C.free(unsafe.Pointer(cName))
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r := C.Window_SelectROI(cName, img.p)
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rect := image.Rect(int(r.x), int(r.y), int(r.x+r.width), int(r.y+r.height))
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return rect
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}
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// SelectROIs selects multiple Regions Of Interest (ROI) on the given image.
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// It creates a window and allows user to select ROIs using mouse.
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//
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// Controls:
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// use space or enter to finish current selection and start a new one
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// use esc to terminate multiple ROI selection process
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//
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// For further details, please see:
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// https://docs.opencv.org/master/d7/dfc/group__highgui.html#ga0f11fad74a6432b8055fb21621a0f893
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//
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func (w *Window) SelectROIs(img Mat) []image.Rectangle {
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cName := C.CString(w.name)
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defer C.free(unsafe.Pointer(cName))
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ret := C.Window_SelectROIs(cName, img.p)
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defer C.Rects_Close(ret)
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return toRectangles(ret)
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}
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// Deprecated: use Window.SelectROI instead
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func SelectROI(name string, img Mat) image.Rectangle {
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cName := C.CString(name)
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defer C.free(unsafe.Pointer(cName))
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r := C.Window_SelectROI(cName, img.p)
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rect := image.Rect(int(r.x), int(r.y), int(r.x+r.width), int(r.y+r.height))
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return rect
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}
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// Deprecated: use Window.SelectROIs instead
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func SelectROIs(name string, img Mat) []image.Rectangle {
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cName := C.CString(name)
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defer C.free(unsafe.Pointer(cName))
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ret := C.Window_SelectROIs(cName, img.p)
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defer C.Rects_Close(ret)
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return toRectangles(ret)
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}
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// WaitKey that is not attached to a specific Window.
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// Only use when no Window exists in your application, e.g. command line app.
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//
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func WaitKey(delay int) int {
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return int(C.Window_WaitKey(C.int(delay)))
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}
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// Trackbar is a wrapper around OpenCV's "HighGUI" window Trackbars.
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type Trackbar struct {
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name string
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parent *Window
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}
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// CreateTrackbar creates a trackbar and attaches it to the specified window.
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//
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// For further details, please see:
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// https://docs.opencv.org/master/d7/dfc/group__highgui.html#gaf78d2155d30b728fc413803745b67a9b
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//
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func (w *Window) CreateTrackbar(name string, max int) *Trackbar {
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cName := C.CString(w.name)
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defer C.free(unsafe.Pointer(cName))
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tName := C.CString(name)
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defer C.free(unsafe.Pointer(tName))
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C.Trackbar_Create(cName, tName, C.int(max))
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return &Trackbar{name: name, parent: w}
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}
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// CreateTrackbarWithValue works like CreateTrackbar but also assigns a
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// variable value to be a position synchronized with the trackbar.
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//
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// For further details, please see:
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// https://docs.opencv.org/master/d7/dfc/group__highgui.html#gaf78d2155d30b728fc413803745b67a9b
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//
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func (w *Window) CreateTrackbarWithValue(name string, value *int, max int) *Trackbar {
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cName := C.CString(w.name)
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defer C.free(unsafe.Pointer(cName))
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tName := C.CString(name)
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defer C.free(unsafe.Pointer(tName))
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C.Trackbar_CreateWithValue(cName, tName, (*C.int)(unsafe.Pointer(value)), C.int(max))
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return &Trackbar{name: name, parent: w}
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}
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// GetPos returns the trackbar position.
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//
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// For further details, please see:
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// https://docs.opencv.org/master/d7/dfc/group__highgui.html#ga122632e9e91b9ec06943472c55d9cda8
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//
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func (t *Trackbar) GetPos() int {
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cName := C.CString(t.parent.name)
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defer C.free(unsafe.Pointer(cName))
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tName := C.CString(t.name)
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defer C.free(unsafe.Pointer(tName))
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return int(C.Trackbar_GetPos(cName, tName))
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}
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// SetPos sets the trackbar position.
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//
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// For further details, please see:
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// https://docs.opencv.org/master/d7/dfc/group__highgui.html#ga67d73c4c9430f13481fd58410d01bd8d
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//
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func (t *Trackbar) SetPos(pos int) {
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cName := C.CString(t.parent.name)
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defer C.free(unsafe.Pointer(cName))
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tName := C.CString(t.name)
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defer C.free(unsafe.Pointer(tName))
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C.Trackbar_SetPos(cName, tName, C.int(pos))
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}
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// SetMin sets the trackbar minimum position.
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//
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// For further details, please see:
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// https://docs.opencv.org/master/d7/dfc/group__highgui.html#gabe26ffe8d2b60cc678895595a581b7aa
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//
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func (t *Trackbar) SetMin(pos int) {
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cName := C.CString(t.parent.name)
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defer C.free(unsafe.Pointer(cName))
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tName := C.CString(t.name)
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defer C.free(unsafe.Pointer(tName))
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C.Trackbar_SetMin(cName, tName, C.int(pos))
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}
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// SetMax sets the trackbar maximum position.
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//
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// For further details, please see:
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// https://docs.opencv.org/master/d7/dfc/group__highgui.html#ga7e5437ccba37f1154b65210902fc4480
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//
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func (t *Trackbar) SetMax(pos int) {
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cName := C.CString(t.parent.name)
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defer C.free(unsafe.Pointer(cName))
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tName := C.CString(t.name)
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defer C.free(unsafe.Pointer(tName))
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C.Trackbar_SetMax(cName, tName, C.int(pos))
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}
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