Method AddImageProvider

qml.go:231–242

AddImageProvider registers f to be called when an image is requested by QML code with the specified provider identifier. It is a runtime error to register the same provider identifier multiple times. The imgId provided to f is the requested image source, with the "image:" scheme and provider identi

(prvId string, f func(imgId string, width, height int) image.Image)

//   http://qt-project.org/doc/qt-5.0/qtquick/qquickimageprovider.html
//
func (e *Engine) AddImageProvider(prvId string, f func(imgId string, width, height int) image.Image) {
	if _, ok := e.imageProviders[prvId]; ok {
		panic(fmt.Sprintf("engine already has an image provider with id %q", prvId))
	}
	e.imageProviders[prvId] = &f
	cprvId, cprvIdLen := unsafeStringData(prvId)
	RunMain(func() {
		qprvId := C.newString(cprvId, cprvIdLen)
		defer C.delString(qprvId)
		C.engineAddImageProvider(e.addr, qprvId, unsafe.Pointer(&f))
	})
}

//export hookRequestImage
func hookRequestImage(imageFunc unsafe.Pointer, cid *C.char, cidLen, cwidth, cheight C.int) unsafe.Pointer {