[SVG] DisplayList-based patterns.

Source/platform/graphics/Pattern.h

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2007-2008 Torch Mobile, Inc.
  * Copyright (C) 2013 Google, 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
@@ skipping 11 matching lines @@
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef Pattern_h
 #define Pattern_h
 
-#include "SkShader.h"
 #include "platform/PlatformExport.h"
-#include "platform/graphics/Image.h"
 #include "platform/transforms/AffineTransform.h"
 
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 
+class SkShader;
+
 namespace blink {
 
+class DisplayList;
+class Image;
+class NativeImageSkia;
+
 class PLATFORM_EXPORT Pattern : public RefCounted<Pattern> {
 public:
     enum RepeatMode {
         RepeatModeX    = 1 << 0,
         RepeatModeY    = 1 << 1,
 
         RepeatModeNone = 0,
         RepeatModeXY   = RepeatModeX | RepeatModeY
     };
 
     static PassRefPtr<Pattern> createBitmapPattern(PassRefPtr<Image> tileImage,
         RepeatMode = RepeatModeXY);
+    static PassRefPtr<Pattern> createDisplayListPattern(PassRefPtr<DisplayList>,
+        RepeatMode = RepeatModeXY);
     ~Pattern();
 
     SkShader* shader();
 
     void setPatternSpaceTransform(const AffineTransform& patternSpaceTransformation);
 
 private:
     Pattern(PassRefPtr<Image>, RepeatMode);
+    Pattern(PassRefPtr<DisplayList>, RepeatMode);
 
     RefPtr<NativeImageSkia> m_tileImage;
+    RefPtr<DisplayList> m_tileDisplayList;
     RepeatMode m_repeatMode;
     AffineTransform m_patternSpaceTransformation;
     RefPtr<SkShader> m_pattern;
     int m_externalMemoryAllocated;
 };
 
 } //namespace
 
 #endif