virtual void onDrawContent(SkCanvas* canvas) {
SkPaint paint;
paint.setShader(fGrad);
// canvas->translate(this->width()/2, this->height()/2);
canvas->translate(64, 64);
canvas->drawPaint(paint);
SkPicture pic;
SkCanvas* c = pic.beginRecording(100, 100, 0);
SkCanvas::LayerIter layerIterator(c, false);
layerIterator.next();
layerIterator.done();
}
static bool isCanvasMultiLayered(SkCanvas* canvas)
{
SkCanvas::LayerIter layerIterator(canvas, false);
layerIterator.next();
return !layerIterator.done();
}