method renderMask

Source

void renderMask(RenderState renderState) {
  if (renderState.renderContext is RenderContextCanvas) {
    var commands = _getCommands(false);
    var context = new _GraphicsContextCanvasMask(renderState);
    _updateContext(context, commands);
  } else {
    var commands = _getCommands(true);
    var context = new GraphicsContextRenderMask(renderState);
    _updateContext(context, commands);
  }
}