SP: Use a high-quality image filter regardless of CTM.

Source/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 938 matching lines @@
 }
 
 SkFilterQuality GraphicsContext::computeFilterQuality(Image* image, const FloatRect& dest, const FloatRect& src) const
 {
     InterpolationQuality resampling;
     if (printing()) {
         resampling = InterpolationNone;
     } else if (image->isLazyDecodedBitmap()) {
         resampling = InterpolationHigh;
     } else {
-        // Take into account scale applied to the canvas when computing sampling mode (e.g. CSS scale or page scale).
-        // FIXME: In slimming paint, we create GCs on the fly when entering a new DisplayItemList
-        // scope, so relying on getTotalMatrix here is not sound.
         SkRect destRectTarget = dest;
-        SkMatrix totalMatrix = getTotalMatrix();
-        if (!(totalMatrix.getType() & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)))
-            totalMatrix.mapRect(&destRectTarget, dest);
-
-        resampling = computeInterpolationQuality(totalMatrix,
+        resampling = computeInterpolationQuality(
             SkScalarToFloat(src.width()), SkScalarToFloat(src.height()),
             SkScalarToFloat(destRectTarget.width()), SkScalarToFloat(destRectTarget.height()),
             image->isImmutableBitmap());
     }
 
     if (resampling == InterpolationNone) {
         // FIXME: This is to not break tests (it results in the filter bitmap flag
         // being set to true). We need to decide if we respect InterpolationNone
         // being returned from computeInterpolationQuality.
         resampling = InterpolationLow;
@@ skipping 591 matching lines @@
     static const SkPMColor colors[] = {
         SkPreMultiplyARGB(0x60, 0xFF, 0x00, 0x00), // More transparent red
         SkPreMultiplyARGB(0x60, 0xC0, 0xC0, 0xC0)  // More transparent gray
     };
 
     return colors[index];
 }
 #endif
 
 } // namespace blink