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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
#include "core/rendering/svg/RenderSVGResourceContainer.h"
#include "core/svg/SVGClipPathElement.h"
namespace WebCore {
class DisplayList;
struct ClipperContext {
WTF_MAKE_FAST_ALLOCATED;
public:
enum ClipperState { NotAppliedState, AppliedPathState, AppliedMaskState };
ClipperContext()
: state(NotAppliedState)
{
}
ClipperState state;
};
class RenderSVGResourceClipper FINAL : public RenderSVGResourceContainer {
public:
explicit 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) OVERRIDE FINAL;
virtual void postApplyResource(RenderObject*, GraphicsContext*&, unsigned short, const Path*, const RenderSVGShape*) OVERRIDE FINAL;
// FIXME: Filters are also stateful resources that could benefit from having their state managed
// on the caller stack instead of the current hashmap. We should look at refactoring these
// into a general interface that can be shared.
bool applyStatefulResource(RenderObject*, GraphicsContext*&, ClipperContext&);
void postApplyStatefulResource(RenderObject*, GraphicsContext*&, ClipperContext&);
// 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
// FIXME: We made applyClippingToContext public because we cannot call applyResource on HTML elements (it asserts on RenderObject::objectBoundingBox)
bool applyClippingToContext(RenderObject*, const FloatRect&, const FloatRect&, GraphicsContext*, ClipperContext&);
FloatRect resourceBoundingBox(RenderObject*);
virtual RenderSVGResourceType resourceType() const { return s_resourceType; }
bool hitTestClipContent(const FloatRect&, const FloatPoint&);
SVGUnitTypes::SVGUnitType clipPathUnits() const { return toSVGClipPathElement(element())->clipPathUnitsCurrentValue(); }
static const RenderSVGResourceType s_resourceType;
private:
bool tryPathOnlyClipping(GraphicsContext*, const AffineTransform&, const FloatRect&);
void drawClipMaskContent(GraphicsContext*, const FloatRect& targetBoundingBox);
PassRefPtr<DisplayList> asDisplayList(GraphicsContext*, const AffineTransform&);
void calculateClipContentRepaintRect();
RefPtr<DisplayList> m_clipContentDisplayList;
FloatRect m_clipBoundaries;
// Reference cycle detection.
bool m_inClipExpansion;
};
DEFINE_RENDER_SVG_RESOURCE_TYPE_CASTS(RenderSVGResourceClipper, ClipperResourceType);
}
#endif
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