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/*
* Copyright (C) 2010 Google 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 AND ITS CONTRIBUTORS "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 OR ITS 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 GraphicsContext3DPrivate_h
#define GraphicsContext3DPrivate_h
#include "Extensions3DChromium.h"
#include "GraphicsContext3D.h"
#include "SkBitmap.h"
#include <wtf/HashSet.h>
#include <wtf/OwnArrayPtr.h>
#include <wtf/OwnPtr.h>
class GrContext;
namespace WebKit {
class WebGraphicsContext3D;
}
namespace WebCore {
class DrawingBuffer;
class Extensions3DChromium;
class GraphicsContext3DContextLostCallbackAdapter;
class GraphicsContext3DErrorMessageCallbackAdapter;
class GrMemoryAllocationChangedCallbackAdapter;
class GraphicsContext3DPrivate {
public:
// Callers must make the context current before using it AND check that the context was created successfully
// via ContextLost before using the context in any way. Once made current on a thread, the context cannot
// be used on any other thread.
static PassRefPtr<GraphicsContext3D> createGraphicsContextFromWebContext(PassOwnPtr<WebKit::WebGraphicsContext3D>, bool preserveDrawingBuffer = false);
// Helper function to provide access to the lower-level WebGraphicsContext3D,
// which is needed for subordinate contexts like WebGL's to share resources
// with the compositor's context.
static WebKit::WebGraphicsContext3D* extractWebGraphicsContext3D(GraphicsContext3D*);
virtual ~GraphicsContext3DPrivate();
WebKit::WebGraphicsContext3D* webContext() const { return m_impl.get(); }
GrContext* grContext();
void markContextChanged();
bool layerComposited() const;
void markLayerComposited();
void paintFramebufferToCanvas(int framebuffer, int width, int height, bool premultiplyAlpha, ImageBuffer*);
void setContextLostCallback(PassOwnPtr<GraphicsContext3D::ContextLostCallback>);
void setErrorMessageCallback(PassOwnPtr<GraphicsContext3D::ErrorMessageCallback>);
// Extensions3D support.
Extensions3D* getExtensions();
bool supportsExtension(const String& name);
bool ensureExtensionEnabled(const String& name);
bool isExtensionEnabled(const String& name);
bool isResourceSafe();
bool preserveDrawingBuffer() const { return m_preserveDrawingBuffer; }
private:
GraphicsContext3DPrivate(PassOwnPtr<WebKit::WebGraphicsContext3D>, bool preserveDrawingBuffer);
void initializeExtensions();
OwnPtr<WebKit::WebGraphicsContext3D> m_impl;
OwnPtr<Extensions3DChromium> m_extensions;
OwnPtr<GraphicsContext3DContextLostCallbackAdapter> m_contextLostCallbackAdapter;
OwnPtr<GraphicsContext3DErrorMessageCallbackAdapter> m_errorMessageCallbackAdapter;
OwnPtr<GrMemoryAllocationChangedCallbackAdapter> m_grContextMemoryAllocationCallbackAdapter;
bool m_initializedAvailableExtensions;
HashSet<String> m_enabledExtensions;
HashSet<String> m_requestableExtensions;
bool m_layerComposited;
bool m_preserveDrawingBuffer;
enum ResourceSafety {
ResourceSafetyUnknown,
ResourceSafe,
ResourceUnsafe
};
ResourceSafety m_resourceSafety;
// If the width and height of the Canvas's backing store don't
// match those that we were given in the most recent call to
// reshape(), then we need an intermediate bitmap to read back the
// frame buffer into. This seems to happen when CSS styles are
// used to resize the Canvas.
SkBitmap m_resizingBitmap;
GrContext* m_grContext;
};
} // namespace WebCore
#endif // GraphicsContext3DPrivate_h
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