dispose method
void
dispose()
Call the dispose method to release memory allocated by WebGL.
Implementation
void dispose() {
if (_texture != null) {
_renderingContext?.deleteTexture(_texture);
}
if (_source is ImageBitmap) {
(_source as ImageBitmap).close();
}
_texture = null;
_source = null;
_canvas = null;
_renderingContext = null;
_contextIdentifier = -1;
_globalFrameListeners.remove(_onGlobalFrame);
}