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/*
* Copyright (C) 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CanvasRenderingContext_h
#define CanvasRenderingContext_h
#include "core/html/HTMLCanvasElement.h"
#include "platform/heap/Handle.h"
#include "wtf/HashSet.h"
#include "wtf/Noncopyable.h"
#include "wtf/text/StringHash.h"
namespace blink { class WebLayer; }
namespace WebCore {
class CanvasImageSource;
class HTMLCanvasElement;
class KURL;
class WebGLObject;
class CanvasRenderingContext : public NoBaseWillBeGarbageCollectedFinalized<CanvasRenderingContext> {
WTF_MAKE_NONCOPYABLE(CanvasRenderingContext);
WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
public:
virtual ~CanvasRenderingContext() { }
#if !ENABLE(OILPAN)
void ref() { m_canvas->ref(); }
void deref() { m_canvas->deref(); }
#endif
HTMLCanvasElement* canvas() const { return m_canvas; }
virtual bool is2d() const { return false; }
virtual bool is3d() const { return false; }
virtual bool isAccelerated() const { return false; }
virtual bool hasAlpha() const { return true; }
virtual void paintRenderingResultsToCanvas() {}
virtual blink::WebLayer* platformLayer() const { return 0; }
virtual void trace(Visitor* visitor) { visitor->trace(m_canvas); }
bool wouldTaintOrigin(CanvasImageSource*);
protected:
CanvasRenderingContext(HTMLCanvasElement*);
private:
RawPtrWillBeMember<HTMLCanvasElement> m_canvas;
HashSet<String> m_cleanURLs;
HashSet<String> m_dirtyURLs;
};
} // namespace WebCore
#endif
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