Implement InterpolationMedium to filter animated images

Source/platform/graphics/GraphicsContext.cpp

Index: Source/platform/graphics/GraphicsContext.cpp
diff --git a/Source/platform/graphics/GraphicsContext.cpp b/Source/platform/graphics/GraphicsContext.cpp
index 9f62b29a780eb6f06ee663c9839aeaec46aa7def..6abe21495fcb98ab816c019efaf7ee542d297120 100644
--- a/Source/platform/graphics/GraphicsContext.cpp
+++ b/Source/platform/graphics/GraphicsContext.cpp
@@ -1027,16 +1027,16 @@ void GraphicsContext::drawImage(Image* image, const IntPoint& p, CompositeOperat
     drawImage(image, FloatRect(IntRect(p, image->size())), FloatRect(FloatPoint(), FloatSize(image->size())), op, shouldRespectImageOrientation);
 }
 
-void GraphicsContext::drawImage(Image* image, const IntRect& r, CompositeOperator op, RespectImageOrientationEnum shouldRespectImageOrientation, bool useLowQualityScale)
+void GraphicsContext::drawImage(Image* image, const IntRect& r, CompositeOperator op, RespectImageOrientationEnum shouldRespectImageOrientation)
 {
     if (!image)
         return;
-    drawImage(image, FloatRect(r), FloatRect(FloatPoint(), FloatSize(image->size())), op, shouldRespectImageOrientation, useLowQualityScale);
+    drawImage(image, FloatRect(r), FloatRect(FloatPoint(), FloatSize(image->size())), op, shouldRespectImageOrientation);
 }
 
-void GraphicsContext::drawImage(Image* image, const FloatRect& dest, const FloatRect& src, CompositeOperator op, RespectImageOrientationEnum shouldRespectImageOrientation, bool useLowQualityScale)
+void GraphicsContext::drawImage(Image* image, const FloatRect& dest, const FloatRect& src, CompositeOperator op, RespectImageOrientationEnum shouldRespectImageOrientation)
 {
-    drawImage(image, dest, src, op, blink::WebBlendModeNormal, shouldRespectImageOrientation, useLowQualityScale);
+    drawImage(image, dest, src, op, blink::WebBlendModeNormal, shouldRespectImageOrientation);
 }
 
 void GraphicsContext::drawImage(Image* image, const FloatRect& dest)
@@ -1046,40 +1046,22 @@ void GraphicsContext::drawImage(Image* image, const FloatRect& dest)
     drawImage(image, dest, FloatRect(IntRect(IntPoint(), image->size())));
 }
 
-void GraphicsContext::drawImage(Image* image, const FloatRect& dest, const FloatRect& src, CompositeOperator op, WebBlendMode blendMode, RespectImageOrientationEnum shouldRespectImageOrientation, bool useLowQualityScale)
-{    if (paintingDisabled() || !image)
+void GraphicsContext::drawImage(Image* image, const FloatRect& dest, const FloatRect& src, CompositeOperator op, WebBlendMode blendMode, RespectImageOrientationEnum shouldRespectImageOrientation)
+{
+    if (paintingDisabled() || !image)
         return;
-
-    InterpolationQuality previousInterpolationQuality = InterpolationDefault;
-
-    if (useLowQualityScale) {
-        previousInterpolationQuality = imageInterpolationQuality();
-        setImageInterpolationQuality(InterpolationLow);
-    }
-
     image->draw(this, dest, src, op, blendMode, shouldRespectImageOrientation);
-
-    if (useLowQualityScale)
-        setImageInterpolationQuality(previousInterpolationQuality);
 }
 
-void GraphicsContext::drawTiledImage(Image* image, const IntRect& destRect, const IntPoint& srcPoint, const IntSize& tileSize, CompositeOperator op, bool useLowQualityScale, WebBlendMode blendMode, const IntSize& repeatSpacing)
+void GraphicsContext::drawTiledImage(Image* image, const IntRect& destRect, const IntPoint& srcPoint, const IntSize& tileSize, CompositeOperator op, WebBlendMode blendMode, const IntSize& repeatSpacing)
 {
     if (paintingDisabled() || !image)
         return;
-
-    if (useLowQualityScale) {
-        InterpolationQuality previousInterpolationQuality = imageInterpolationQuality();
-        setImageInterpolationQuality(InterpolationLow);
-        image->drawTiled(this, destRect, srcPoint, tileSize, op, blendMode, repeatSpacing);
-        setImageInterpolationQuality(previousInterpolationQuality);
-    } else {
-        image->drawTiled(this, destRect, srcPoint, tileSize, op, blendMode, repeatSpacing);
-    }
+    image->drawTiled(this, destRect, srcPoint, tileSize, op, blendMode, repeatSpacing);
 }
 
 void GraphicsContext::drawTiledImage(Image* image, const IntRect& dest, const IntRect& srcRect,
-    const FloatSize& tileScaleFactor, Image::TileRule hRule, Image::TileRule vRule, CompositeOperator op, bool useLowQualityScale)
+    const FloatSize& tileScaleFactor, Image::TileRule hRule, Image::TileRule vRule, CompositeOperator op)
 {
     if (paintingDisabled() || !image)
         return;
@@ -1090,14 +1072,7 @@ void GraphicsContext::drawTiledImage(Image* image, const IntRect& dest, const In
         return;
     }
 
-    if (useLowQualityScale) {
-        InterpolationQuality previousInterpolationQuality = imageInterpolationQuality();
-        setImageInterpolationQuality(InterpolationLow);
-        image->drawTiled(this, dest, srcRect, tileScaleFactor, hRule, vRule, op);
-        setImageInterpolationQuality(previousInterpolationQuality);
-    } else {
-        image->drawTiled(this, dest, srcRect, tileScaleFactor, hRule, vRule, op);
-    }
+    image->drawTiled(this, dest, srcRect, tileScaleFactor, hRule, vRule, op);
 }
 
 void GraphicsContext::drawImageBuffer(ImageBuffer* image, const IntPoint& p, CompositeOperator op, WebBlendMode blendMode)
@@ -1107,11 +1082,11 @@ void GraphicsContext::drawImageBuffer(ImageBuffer* image, const IntPoint& p, Com
     drawImageBuffer(image, FloatRect(IntRect(p, image->size())), FloatRect(FloatPoint(), FloatSize(image->size())), op, blendMode);
 }
 
-void GraphicsContext::drawImageBuffer(ImageBuffer* image, const IntRect& r, CompositeOperator op, WebBlendMode blendMode, bool useLowQualityScale)
+void GraphicsContext::drawImageBuffer(ImageBuffer* image, const IntRect& r, CompositeOperator op, WebBlendMode blendMode)
 {
     if (!image)
         return;
-    drawImageBuffer(image, FloatRect(r), FloatRect(FloatPoint(), FloatSize(image->size())), op, blendMode, useLowQualityScale);
+    drawImageBuffer(image, FloatRect(r), FloatRect(FloatPoint(), FloatSize(image->size())), op, blendMode);
 }
 
 void GraphicsContext::drawImageBuffer(ImageBuffer* image, const IntPoint& dest, const IntRect& srcRect, CompositeOperator op, WebBlendMode blendMode)
@@ -1119,9 +1094,9 @@ void GraphicsContext::drawImageBuffer(ImageBuffer* image, const IntPoint& dest,
     drawImageBuffer(image, FloatRect(IntRect(dest, srcRect.size())), FloatRect(srcRect), op, blendMode);
 }
 
-void GraphicsContext::drawImageBuffer(ImageBuffer* image, const IntRect& dest, const IntRect& srcRect, CompositeOperator op, WebBlendMode blendMode, bool useLowQualityScale)
+void GraphicsContext::drawImageBuffer(ImageBuffer* image, const IntRect& dest, const IntRect& srcRect, CompositeOperator op, WebBlendMode blendMode)
 {
-    drawImageBuffer(image, FloatRect(dest), FloatRect(srcRect), op, blendMode, useLowQualityScale);
+    drawImageBuffer(image, FloatRect(dest), FloatRect(srcRect), op, blendMode);
 }
 
 void GraphicsContext::drawImageBuffer(ImageBuffer* image, const FloatRect& dest)
@@ -1131,19 +1106,11 @@ void GraphicsContext::drawImageBuffer(ImageBuffer* image, const FloatRect& dest)
     drawImageBuffer(image, dest, FloatRect(IntRect(IntPoint(), image->size())));
 }
 
-void GraphicsContext::drawImageBuffer(ImageBuffer* image, const FloatRect& dest, const FloatRect& src, CompositeOperator op, WebBlendMode blendMode, bool useLowQualityScale)
+void GraphicsContext::drawImageBuffer(ImageBuffer* image, const FloatRect& dest, const FloatRect& src, CompositeOperator op, WebBlendMode blendMode)
 {
     if (paintingDisabled() || !image)
         return;
-
-    if (useLowQualityScale) {
-        InterpolationQuality previousInterpolationQuality = imageInterpolationQuality();
-        setImageInterpolationQuality(InterpolationLow);
-        image->draw(this, dest, src, op, blendMode, useLowQualityScale);
-        setImageInterpolationQuality(previousInterpolationQuality);
-    } else {
-        image->draw(this, dest, src, op, blendMode, useLowQualityScale);
-    }
+    image->draw(this, dest, src, op, blendMode);
 }
 
 void GraphicsContext::writePixels(const SkImageInfo& info, const void* pixels, size_t rowBytes, int x, int y)