1 files changed, 79 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/RenderSVGResourceClipper.h b/Source/WebCore/rendering/RenderSVGResourceClipper.h
new file mode 100644
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+++ b/Source/WebCore/rendering/RenderSVGResourceClipper.h
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+/*
+ * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef RenderSVGResourceClipper_h
+#define RenderSVGResourceClipper_h
+
+#if ENABLE(SVG)
+#include "FloatRect.h"
+#include "GraphicsContext.h"
+#include "ImageBuffer.h"
+#include "IntSize.h"
+#include "Path.h"
+#include "RenderSVGResourceContainer.h"
+#include "SVGClipPathElement.h"
+#include "SVGUnitTypes.h"
+
+#include <wtf/HashMap.h>
+#include <wtf/OwnPtr.h>
+
+namespace WebCore {
+
+struct ClipperData : FastAllocBase {
+    OwnPtr<ImageBuffer> clipMaskImage;
+};
+
+class RenderSVGResourceClipper : public RenderSVGResourceContainer {
+public:
+    RenderSVGResourceClipper(SVGClipPathElement*);
+    virtual ~RenderSVGResourceClipper();
+
+    virtual const char* renderName() const { return "RenderSVGResourceClipper"; }
+
+    virtual void removeAllClientsFromCache(bool markForInvalidation = true);
+    virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true);
+
+    virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode);
+    virtual FloatRect resourceBoundingBox(RenderObject*);
+
+    virtual RenderSVGResourceType resourceType() const { return ClipperResourceType; }
+    
+    bool hitTestClipContent(const FloatRect&, const FloatPoint&);
+
+    SVGUnitTypes::SVGUnitType clipPathUnits() const { return toUnitType(static_cast<SVGClipPathElement*>(node())->clipPathUnits()); }
+
+    static RenderSVGResourceType s_resourceType;
+private:
+    // clipPath can be clipped too, but don't have a boundingBox or repaintRect. So we can't call
+    // applyResource directly and use the rects from the object, since they are empty for RenderSVGResources
+    bool applyClippingToContext(RenderObject*, const FloatRect&, const FloatRect&, GraphicsContext*);
+    bool pathOnlyClipping(GraphicsContext*, const FloatRect&);
+    bool drawContentIntoMaskImage(ClipperData*, const FloatRect& objectBoundingBox);
+    void calculateClipContentRepaintRect();
+
+    bool m_invalidationBlocked;
+    FloatRect m_clipBoundaries;
+    HashMap<RenderObject*, ClipperData*> m_clipper;
+};
+
+}
+
+#endif
+#endif