Compute source/destination rectangles in FEComponentTransfer::applySkia

Source/platform/graphics/filters/FEComponentTransfer.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 171 matching lines @@
         return false;
 
     RefPtr<Image> image = in->asImageBuffer()->copyImage(DontCopyBackingStore);
     RefPtr<NativeImageSkia> nativeImage = image->nativeImageForCurrentFrame();
     if (!nativeImage)
         return false;
 
     unsigned char rValues[256], gValues[256], bValues[256], aValues[256];
     getValues(rValues, gValues, bValues, aValues);
 
+    SkRect skSrc = requestedRegionOfInputImageData(in->absolutePaintRect());
+    SkRect skDst = IntRect(IntPoint(), absolutePaintRect().size());
     SkPaint paint;
     paint.setColorFilter(SkTableColorFilter::CreateARGB(aValues, rValues, gValues, bValues))->unref();
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
-    resultImage->context()->drawBitmap(nativeImage->bitmap(), 0, 0, &paint);
+    resultImage->context()->drawBitmapRect(nativeImage->bitmap(), &skSrc, skDst, &paint);
 
     return true;
 }
 
 PassRefPtr<SkImageFilter> FEComponentTransfer::createImageFilter(SkiaImageFilterBuilder* builder)
 {
     RefPtr<SkImageFilter> input(builder->build(inputEffect(0), operatingColorSpace()));
 
     unsigned char rValues[256], gValues[256], bValues[256], aValues[256];
     getValues(rValues, gValues, bValues, aValues);
@@ skipping 66 matching lines @@
     ts << "{green: " << m_greenFunc << "}\n";
     writeIndent(ts, indent + 2);
     ts << "{blue: " << m_blueFunc << "}\n";
     writeIndent(ts, indent + 2);
     ts << "{alpha: " << m_alphaFunc << "}]\n";
     inputEffect(0)->externalRepresentation(ts, indent + 1);
     return ts;
 }
 
 } // namespace WebCore