Use SkImage as a backing store for copying 2d Contexts to ImageBitmaps.

Source/core/platform/graphics/GraphicsContext.cpp

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 21 matching lines @@
 #include "core/platform/graphics/ImageBuffer.h"
 #include "core/platform/graphics/IntRect.h"
 #include "core/platform/graphics/RoundedRect.h"
 #include "core/platform/graphics/TextRunIterator.h"
 #include "core/platform/graphics/skia/SkiaUtils.h"
 #include "core/platform/text/BidiResolver.h"
 #include "third_party/skia/include/core/SkAnnotation.h"
 #include "third_party/skia/include/core/SkColorFilter.h"
 #include "third_party/skia/include/core/SkData.h"
 #include "third_party/skia/include/core/SkDevice.h"
+#include "third_party/skia/include/core/SkImage.h"
 #include "third_party/skia/include/core/SkRRect.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
 #include "third_party/skia/include/effects/SkBlurMaskFilter.h"
 #include "third_party/skia/include/effects/SkCornerPathEffect.h"
 #include "weborigin/KURL.h"
 #include "wtf/Assertions.h"
 #include "wtf/MathExtras.h"
 
 #if OS(DARWIN)
 #include <ApplicationServices/ApplicationServices.h>
@@ skipping 958 matching lines @@
         previousInterpolationQuality = imageInterpolationQuality();
         setImageInterpolationQuality(InterpolationLow);
     }
 
     image->draw(this, dest, src, op, blendMode, shouldRespectImageOrientation);
 
     if (useLowQualityScale)
         setImageInterpolationQuality(previousInterpolationQuality);
 }
 
+void GraphicsContext::drawImage(SkImage* image, const FloatRect& dest, const FloatRect& src, CompositeOperator op, BlendMode blendMode, bool useLowQualityScale)
+{
+    if (paintingDisabled() || !image)
+        return;
+
+    InterpolationQuality previousInterpolationQuality = InterpolationDefault;
+
+    if (useLowQualityScale) {
+        previousInterpolationQuality = imageInterpolationQuality();
+        setImageInterpolationQuality(InterpolationLow);
+    }
+
+    image->draw(canvas(), dest, src, 0);
+
+    if (useLowQualityScale)
+        setImageInterpolationQuality(previousInterpolationQuality);
+}
+
 void GraphicsContext::drawTiledImage(Image* image, const IntRect& destRect, const IntPoint& srcPoint, const IntSize& tileSize, CompositeOperator op, bool useLowQualityScale, BlendMode blendMode)
 {
     if (paintingDisabled() || !image)
         return;
 
     if (useLowQualityScale) {
         InterpolationQuality previousInterpolationQuality = imageInterpolationQuality();
         setImageInterpolationQuality(InterpolationLow);
         image->drawTiled(this, destRect, srcPoint, tileSize, op, blendMode);
         setImageInterpolationQuality(previousInterpolationQuality);
@@ skipping 865 matching lines @@
 
 void GraphicsContext::didDrawTextInRect(const SkRect& textRect)
 {
     if (m_trackTextRegion) {
         TRACE_EVENT0("skia", "PlatformContextSkia::trackTextRegion");
         m_textRegion.join(textRect);
     }
 }
 
 }