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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkCanvas.h"
// This should be on SkCanvas imho
static void rotateAbout(SkCanvas* canvas, SkScalar degrees,
SkScalar px, SkScalar py) {
canvas->translate(px, py);
canvas->rotate(degrees);
canvas->translate(-px, -py);
}
class SaveLayerGM : public skiagm::GM {
void drawStuff(SkCanvas* canvas, const SkRect& r) {
SkPaint paint;
paint.setAntiAlias(true);
canvas->drawOval(r, paint);
}
public:
SaveLayerGM() {}
protected:
SkString onShortName() {
return SkString("savelayer");
}
virtual SkISize onISize() { return SkISize::Make(100, 100); }
virtual void onDraw(SkCanvas* canvas) {
SkPaint hairpaint;
hairpaint.setAntiAlias(true);
hairpaint.setStyle(SkPaint::kStroke_Style);
hairpaint.setColor(SK_ColorRED);
canvas->translate(50, 50);
SkRect r = SkRect::MakeWH(100, 60);
SkRect r2 = r;
r2.inset(5, 5);
this->drawStuff(canvas, r);
canvas->drawRect(r, hairpaint);
canvas->translate(r.width() * 5/4, 0);
canvas->saveLayer(&r2, NULL);
this->drawStuff(canvas, r);
canvas->restore();
canvas->drawRect(r, hairpaint);
canvas->translate(r.width() * 5/4, 0);
// We need to ensure that we still clip against r2 (after it is rotated)
// even though the layer's bounds will be larger (since they are the
// enclosing rect of rotated-r2).
rotateAbout(canvas, 30, r.centerX(), r.centerY());
canvas->saveLayer(&r2, NULL);
this->drawStuff(canvas, r);
canvas->restore();
canvas->drawRect(r, hairpaint);
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static skiagm::GM* MyFactory(void*) { return new SaveLayerGM; }
static skiagm::GMRegistry reg(MyFactory);
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