Use blitframebuffer to implement copySurface.

gm/mixedxfermodes.cpp

 
 /*
  * Copyright 2013 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 "SkBitmap.h"
 #include "SkRandom.h"
@@ skipping 27 matching lines @@
 protected:
     virtual SkString onShortName() {
         return SkString("mixed_xfermodes");
     }
 
     virtual SkISize onISize() {
         return make_isize(790, 640);
     }
 
     virtual void onDraw(SkCanvas* canvas) {
-        // FIXME: Currently necessary for GPU to be able to make dst-copy in SampleApp because
-        // main layer is not a texture.
-        SkPaint layerPaint;
-        layerPaint.setXfermodeMode(SkXfermode::kSrc_Mode);
-        canvas->saveLayer(NULL, &layerPaint);
-
         SkPaint bgPaint;
         bgPaint.setShader(fBG.get());
         canvas->drawPaint(bgPaint);
         SkISize size = canvas->getDeviceSize();
         SkScalar areaSqrt = SkScalarSqrt((SkIntToScalar(size.fWidth * size.fHeight)));
         SkScalar minR = areaSqrt / 10;
         SkScalar maxR = areaSqrt / 4;
         SkMWCRandom random;
         for (int i = 0; i < kNumCircles; ++i) {
             SkScalar cx = random.nextRangeScalar(0, SkIntToScalar(size.fWidth));
@@ skipping 15 matching lines @@
 
         // FIXME: Remove text draw once this GM is finished.
         SkPaint txtPaint;
         txtPaint.setTextSize(areaSqrt / 20);
         txtPaint.setAntiAlias(true);
         static const char kTxt[] = "Work in progres... Do not baseline.";
         canvas->drawText(kTxt, strlen(kTxt),
                          areaSqrt/50,
                          SkIntToScalar(size.fHeight / 2),
                          txtPaint);
-
-        canvas->restore();
     }
 
 private:
     enum {
         kMinR = 10,
         kMaxR = 50,
         kNumCircles = 50,
     };
     SkAutoTUnref<SkShader> fBG;
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new MixedXfermodesGM; }
 static GMRegistry reg(MyFactory);
 
 }