Clamp background tiles when possible

third_party/WebKit/Source/platform/graphics/Image.h

 /*
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, 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 138 matching lines @@
   // setImageObserverDisabled() other than from ImageObserverDisabler.
   void setImageObserverDisabled(bool disabled) {
     m_imageObserverDisabled = disabled;
   }
 
   enum TileRule { StretchTile, RoundTile, SpaceTile, RepeatTile };
 
   virtual sk_sp<SkImage> imageForCurrentFrame(const ColorBehavior&) = 0;
   virtual PassRefPtr<Image> imageForDefaultFrame();
 
-  virtual void drawPattern(GraphicsContext&,
-                           const FloatRect&,
-                           const FloatSize&,
-                           const FloatPoint& phase,
-                           SkBlendMode,
-                           const FloatRect&,
-                           const FloatSize& repeatSpacing = FloatSize());
-
   enum ImageClampingMode {
     ClampImageToSourceRect,
     DoNotClampImageToSourceRect
   };
 
   virtual void draw(SkCanvas*,
                     const SkPaint&,
                     const FloatRect& dstRect,
                     const FloatRect& srcRect,
                     RespectImageOrientationEnum,
@@ skipping 29 matching lines @@
                            SkBlendMode,
                            const FloatSize& repeatSpacing);
   void drawTiledBorder(GraphicsContext&,
                        const FloatRect& dstRect,
                        const FloatRect& srcRect,
                        const FloatSize& tileScaleFactor,
                        TileRule hRule,
                        TileRule vRule,
                        SkBlendMode);
 
+  virtual void drawPattern(GraphicsContext&,
+                           const FloatRect&,
+                           const FloatSize&,
+                           const FloatPoint& phase,
+                           SkBlendMode,
+                           const FloatRect&,
+                           const FloatSize& repeatSpacing = FloatSize());
+
  private:
   RefPtr<SharedBuffer> m_encodedImageData;
   // TODO(Oilpan): consider having Image on the Oilpan heap and
   // turn this into a Member<>.
   //
   // The observer (an ImageResourceContent) is an untraced member, with the
   // ImageResourceContent being responsible for clearing itself out.
   UntracedMember<ImageObserver> m_imageObserver;
   bool m_imageObserverDisabled;
 };
 
 #define DEFINE_IMAGE_TYPE_CASTS(typeName)                          \
   DEFINE_TYPE_CASTS(typeName, Image, image, image->is##typeName(), \
                     image.is##typeName())
 
 }  // namespace blink
 
 #endif