Change filter quality when scaling-down in drawImage

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/graphics/PaintGeneratedImage.h"
 
 #include "platform/geometry/FloatRect.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "third_party/skia/include/core/SkPicture.h"
 
 namespace blink {
 
-void PaintGeneratedImage::draw(SkCanvas* canvas, const SkPaint& paint, const FloatRect& destRect, const FloatRect& srcRect, RespectImageOrientationEnum, ImageClampingMode)
+void PaintGeneratedImage::draw(SkCanvas* canvas, const SkPaint& paint, const FloatRect& destRect, const FloatRect& srcRect, bool imageSmoothingEnabled, RespectImageOrientationEnum, ImageClampingMode)
 {
     SkAutoCanvasRestore ar(canvas, true);
     canvas->clipRect(destRect);
     canvas->translate(destRect.x(), destRect.y());
     if (destRect.size() != srcRect.size())
         canvas->scale(destRect.width() / srcRect.width(), destRect.height() / srcRect.height());
     canvas->translate(-srcRect.x(), -srcRect.y());
-    canvas->drawPicture(m_picture.get(), nullptr, &paint);
+
+    SkPaint adjustedPaint = paint;
+    if (!imageSmoothingEnabled && Image::isDrawScalingDown(srcRect, destRect))
+        adjustedPaint.setFilterQuality(kLow_SkFilterQuality);
+
+    canvas->drawPicture(m_picture.get(), nullptr, &adjustedPaint);
 }
 
 void PaintGeneratedImage::drawTile(GraphicsContext& context, const FloatRect& srcRect)
 {
     context.drawPicture(m_picture.get());
 }
 
 } // namespace blink