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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 LayoutSVGResourceClipper_h
#define LayoutSVGResourceClipper_h
#include "core/layout/svg/LayoutSVGResourceContainer.h"
#include "core/svg/SVGClipPathElement.h"
#include "third_party/skia/include/core/SkRefCnt.h"
class SkPicture;
namespace blink {
class LayoutSVGResourceClipper final : public LayoutSVGResourceContainer {
public:
explicit LayoutSVGResourceClipper(SVGClipPathElement*);
~LayoutSVGResourceClipper() override;
const char* name() const override { return "LayoutSVGResourceClipper"; }
void removeAllClientsFromCache(bool markForInvalidation = true) override;
void removeClientFromCache(LayoutObject*,
bool markForInvalidation = true) override;
FloatRect resourceBoundingBox(const FloatRect& referenceBox);
static const LayoutSVGResourceType s_resourceType = ClipperResourceType;
LayoutSVGResourceType resourceType() const override { return s_resourceType; }
bool hitTestClipContent(const FloatRect&, const FloatPoint&);
SVGUnitTypes::SVGUnitType clipPathUnits() const {
return toSVGClipPathElement(element())
->clipPathUnits()
->currentValue()
->enumValue();
}
bool asPath(const AffineTransform&, const FloatRect& referenceBox, Path&);
sk_sp<const SkPicture> createContentPicture();
bool hasCycle() { return m_inClipExpansion; }
void beginClipExpansion() {
ASSERT(!m_inClipExpansion);
m_inClipExpansion = true;
}
void endClipExpansion() {
ASSERT(m_inClipExpansion);
m_inClipExpansion = false;
}
private:
void calculateLocalClipBounds();
// Return true if the clip path was calculated or a cached value is available.
bool calculateClipContentPathIfNeeded();
// Cache of the clip path when using path clipping.
Path m_clipContentPath;
// Cache of the clip path picture when falling back to masking for clipping.
sk_sp<const SkPicture> m_clipContentPicture;
FloatRect m_localClipBounds;
// Reference cycle detection.
bool m_inClipExpansion;
};
DEFINE_LAYOUT_SVG_RESOURCE_TYPE_CASTS(LayoutSVGResourceClipper,
ClipperResourceType);
} // namespace blink
#endif
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