Add support for SVG Clip paths in HTML

Source/core/rendering/RenderLayer.h

Index: Source/core/rendering/RenderLayer.h
diff --git a/Source/core/rendering/RenderLayer.h b/Source/core/rendering/RenderLayer.h
index 5871a502fb9036b79b1d2b1bb0f9a6679b22da5e..debff6614e6ab251528bf71449ac377b8744ba49 100644
--- a/Source/core/rendering/RenderLayer.h
+++ b/Source/core/rendering/RenderLayer.h
@@ -49,6 +49,7 @@
 #include "core/rendering/LayerPaintingInfo.h"
 #include "core/rendering/RenderBox.h"
 #include "core/rendering/RenderLayerBlendInfo.h"
+#include "core/rendering/RenderLayerClipPathInfo.h"
 #include "core/rendering/RenderLayerClipper.h"
 #include "core/rendering/RenderLayerFilterInfo.h"
 #include "core/rendering/RenderLayerReflectionInfo.h"
@@ -302,7 +303,7 @@ public:
     // FIXME: reflections should force transform-style to be flat in the style: https://bugs.webkit.org/show_bug.cgi?id=106959
     bool shouldPreserve3D() const { return !renderer()->hasReflection() && renderer()->style()->transformStyle3D() == TransformStyle3DPreserve3D; }
 
-    void filterNeedsPaintInvalidation();
+    void SVGEffectsNeedsPaintInvalidation();

[pdr., 2014/08/04 17:06:32]

We should use "svgEffectsNeedPaintInvalidation" (lowercase 'svg' and just a
singular need)

[f(malita), 2014/08/05 14:13:07]

+1.

[Shanmuga Pandi, 2014/08/06 14:51:34]

Done.

     bool hasFilter() const { return renderer()->hasFilter(); }
 
     bool paintsWithBlendMode() const;
@@ -643,6 +644,8 @@ private:
 
     void updateReflectionInfo(const RenderStyle*);
 
+    void updateClipPathInfo(const RenderStyle* oldStyle, const RenderStyle* newStyle);
+
     // FIXME: We could lazily allocate our ScrollableArea based on style properties ('overflow', ...)
     // but for now, we are always allocating it for RenderBox as it's safer.
     bool requiresScrollableArea() const { return renderBox(); }
@@ -770,6 +773,7 @@ private:
     RenderLayerClipper m_clipper; // FIXME: Lazily allocate?
     OwnPtr<RenderLayerStackingNode> m_stackingNode;
     OwnPtr<RenderLayerReflectionInfo> m_reflectionInfo;
+    OwnPtr<RenderLayerClipPathInfo> m_clipPathInfo;

[f(malita), 2014/08/05 14:13:08]

This increases the size of all RenderLayers, but very few of them actually get a
clip path. I think using a static map just like RenderLayerFilterInfo would make
more sense.

[Shanmuga Pandi, 2014/08/06 14:51:34]

Initially I tried that way (Patch set1). But I thought static map is not needed
and like copy-pasta , so removed the unnecessary code and followed like
m_reflectionInfo.

     RenderLayerBlendInfo m_blendInfo;
 
     LayoutSize m_subpixelAccumulation; // The accumulated subpixel offset of a composited layer's composited bounds compared to absolute coordinates.