Change filter quality when scaling-down in drawImage

third_party/WebKit/Source/platform/graphics/CrossfadeGeneratedImage.cpp

Index: third_party/WebKit/Source/platform/graphics/CrossfadeGeneratedImage.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/CrossfadeGeneratedImage.cpp b/third_party/WebKit/Source/platform/graphics/CrossfadeGeneratedImage.cpp
index f3c28073dd30e1bdb7200873200ca6e45ee08ae3..876206440dc2cb577938222b799dbb2af7041dd2 100644
--- a/third_party/WebKit/Source/platform/graphics/CrossfadeGeneratedImage.cpp
+++ b/third_party/WebKit/Source/platform/graphics/CrossfadeGeneratedImage.cpp
@@ -62,14 +62,14 @@ void CrossfadeGeneratedImage::drawCrossfade(SkCanvas* canvas, const SkPaint& pai
     // TODO(junov): This code should probably be propagating the RespectImageOrientationEnum
     // form CrossfadeGeneratedImage::draw. Code was written this way during refactoring to
     // avoid modifying existing behavior, but this warrants further investigation. crbug.com/472634
-    m_fromImage->draw(canvas, imagePaint, destRect, fromImageRect, DoNotRespectImageOrientation, clampMode);
+    m_fromImage->draw(canvas, imagePaint, destRect, fromImageRect, true, DoNotRespectImageOrientation, clampMode);
     imagePaint.setXfermodeMode(SkXfermode::kPlus_Mode);
     imageAlpha = clampedAlphaForBlending(m_percentage);
     imagePaint.setAlpha(imageAlpha > 255 ? 255 : imageAlpha);
-    m_toImage->draw(canvas, imagePaint, destRect, toImageRect, DoNotRespectImageOrientation, clampMode);
+    m_toImage->draw(canvas, imagePaint, destRect, toImageRect, true, DoNotRespectImageOrientation, clampMode);
 }
 
-void CrossfadeGeneratedImage::draw(SkCanvas* canvas, const SkPaint& paint, const FloatRect& dstRect, const FloatRect& srcRect, RespectImageOrientationEnum, ImageClampingMode clampMode)
+void CrossfadeGeneratedImage::draw(SkCanvas* canvas, const SkPaint& paint, const FloatRect& dstRect, const FloatRect& srcRect, bool imageSmoothingEnabled, RespectImageOrientationEnum, ImageClampingMode clampMode)
 {
     // Draw nothing if either of the images hasn't loaded yet.
     if (m_fromImage == Image::nullImage() || m_toImage == Image::nullImage())
@@ -82,7 +82,11 @@ void CrossfadeGeneratedImage::draw(SkCanvas* canvas, const SkPaint& paint, const
         canvas->scale(dstRect.width() / srcRect.width(), dstRect.height() / srcRect.height());
     canvas->translate(-srcRect.x(), -srcRect.y());
 
-    drawCrossfade(canvas, paint, clampMode);
+    SkPaint adjustedPaint = paint;
+    if (!imageSmoothingEnabled && Image::isDrawScalingDown(srcRect, dstRect))
+        adjustedPaint.setFilterQuality(kLow_SkFilterQuality);
+
+    drawCrossfade(canvas, adjustedPaint, clampMode);
 }
 
 void CrossfadeGeneratedImage::drawTile(GraphicsContext& context, const FloatRect& srcRect)