func main() {
fmt.Println("Hello World!")
text := C.CString("Hello World!")
defer C.free(unsafe.Pointer(text))
C.cvNamedWindow(text, 1)
img := unsafe.Pointer(C.cvCreateImage(C.cvSize(640, 480), C.IPL_DEPTH_8U, 1))
C.cvSet(img, C.cvScalar(0, 0, 0, 0), nil)
var font C.CvFont
C.cvInitFont(&font, C.CV_FONT_HERSHEY_SIMPLEX|C.CV_FONT_ITALIC,
1.0, 1.0, 0, 1, 8)
C.cvPutText(img, text, C.cvPoint(200, 400), &font,
C.cvScalar(255, 255, 0, 0))
C.cvShowImage(text, img)
C.cvWaitKey(0)
}
/* create window */
func NewWindow(name string, flags ...int) *Window {
win_flags := C.int(CV_WINDOW_AUTOSIZE)
if len(flags) > 0 {
win_flags = C.int(flags[0])
}
win := &Window{
name: name,
name_c: C.CString(name),
flags: win_flags,
trackbarHandle: make(map[string]TrackbarFunc, 50),
trackbarMax: make(map[string]int, 50),
trackbarVal: make(map[string]int, 50),
trackbarName: make(map[string](*C.char), 50),
trackbarParam: make(map[string]([]interface{}), 50),
}
C.cvNamedWindow(win.name_c, win.flags)
C.SetMouseCallback(win.name_c)
allWindows[win.name] = win
return win
}