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/*
* Copyright (C) 2010, 2011, 2012 Research In Motion Limited. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef EGLImageLayerWebKitThread_h
#define EGLImageLayerWebKitThread_h
#if USE(ACCELERATED_COMPOSITING)
#include "EGLImageLayerCompositingThreadClient.h"
#include "LayerWebKitThread.h"
namespace WebCore {
// Base class for EGLImage based layers
// The subclass must reimplement updateTextureContentsIfNeeded() to call updateFrontBuffer
// with the appropriate parameters, and make sure to call deleteFrontBuffer() from its
// destructor.
class EGLImageLayerWebKitThread : public LayerWebKitThread {
public:
virtual ~EGLImageLayerWebKitThread();
virtual void setNeedsDisplay();
protected:
EGLImageLayerWebKitThread(LayerType);
virtual void updateTextureContentsIfNeeded() = 0;
virtual void commitPendingTextureUploads();
virtual void deleteTextures() = 0;
// The context must be current before you call any of these
void updateFrontBuffer(const IntSize&, unsigned backBufferTexture);
void deleteFrontBuffer();
private:
bool createImageIfNeeded(const IntSize&);
void createShaderIfNeeded();
void blitToFrontBuffer(unsigned backBufferTexture);
RefPtr<EGLImageLayerCompositingThreadClient> m_client;
bool m_needsDisplay;
unsigned m_frontBufferTexture;
unsigned m_fbo;
unsigned m_program;
void* m_image;
Vector<void*> m_garbage;
IntSize m_size;
};
}
#endif // USE(ACCELERATED_COMPOSITING)
#endif // EGLImageLayerWebKitThread_h
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