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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.
*/
#pragma once
#include "RenderSVGResourceContainer.h"
#include "SVGUnitTypes.h"
#include <wtf/HashMap.h>
namespace WebCore {
class GraphicsContext;
class ImageBuffer;
class SVGClipPathElement;
struct ClipperData {
WTF_MAKE_STRUCT_FAST_ALLOCATED;
struct Inputs {
bool operator==(const Inputs& other) const = default;
FloatRect objectBoundingBox;
FloatRect clippedContentBounds;
FloatSize scale;
float effectiveZoom = 1;
bool paintingDisabled { false };
};
bool invalidate(const Inputs& inputs)
{
if (this->inputs != inputs) {
imageBuffer = nullptr;
this->inputs = inputs;
}
return !imageBuffer;
}
RefPtr<ImageBuffer> imageBuffer;
Inputs inputs;
};
class RenderSVGResourceClipper final : public RenderSVGResourceContainer {
WTF_MAKE_ISO_ALLOCATED(RenderSVGResourceClipper);
public:
RenderSVGResourceClipper(SVGClipPathElement&, RenderStyle&&);
virtual ~RenderSVGResourceClipper();
inline SVGClipPathElement& clipPathElement() const;
void removeAllClientsFromCache(bool markForInvalidation = true) override;
void removeClientFromCache(RenderElement&, bool markForInvalidation = true) override;
bool applyResource(RenderElement&, const RenderStyle&, GraphicsContext*&, OptionSet<RenderSVGResourceMode>) override;
// 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)
// objectBoundingBox ia used to compute clip path geometry when clipPathUnits="objectBoundingBox".
// clippedContentBounds is the bounds of the content to which clipping is being applied.
bool applyClippingToContext(GraphicsContext&, RenderElement&, const FloatRect& objectBoundingBox, const FloatRect& clippedContentBounds, float effectiveZoom = 1);
FloatRect resourceBoundingBox(const RenderObject&) override;
RenderSVGResourceType resourceType() const override { return ClipperResourceType; }
bool hitTestClipContent(const FloatRect&, const FloatPoint&);
inline SVGUnitTypes::SVGUnitType clipPathUnits() const;
private:
bool selfNeedsClientInvalidation() const override { return (everHadLayout() || m_clipperMap.size()) && selfNeedsLayout(); }
void element() const = delete;
ASCIILiteral renderName() const override { return "RenderSVGResourceClipper"_s; }
bool isSVGResourceClipper() const override { return true; }
ClipperData::Inputs computeInputs(const GraphicsContext&, const RenderElement&, const FloatRect& objectBoundingBox, const FloatRect& clippedContentBounds, float effectiveZoom);
bool pathOnlyClipping(GraphicsContext&, const AffineTransform&, const FloatRect&, float effectiveZoom);
bool drawContentIntoMaskImage(ImageBuffer&, const FloatRect& objectBoundingBox, float effectiveZoom);
void calculateClipContentRepaintRect();
FloatRect m_clipBoundaries;
HashMap<const RenderObject*, std::unique_ptr<ClipperData>> m_clipperMap;
};
}
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::RenderSVGResourceClipper)
static bool isType(const WebCore::RenderObject& renderer) { return renderer.isSVGResourceClipper(); }
static bool isType(const WebCore::RenderSVGResource& resource) { return resource.resourceType() == WebCore::ClipperResourceType; }
SPECIALIZE_TYPE_TRAITS_END()
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