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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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER 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 VideoLayerChromium_h
#define VideoLayerChromium_h
#if USE(ACCELERATED_COMPOSITING)
#include "LayerChromium.h"
#include "VideoFrameProvider.h"
namespace WebCore {
// A Layer that contains a Video element.
class VideoLayerChromium : public LayerChromium {
public:
static PassRefPtr<VideoLayerChromium> create(GraphicsLayerChromium* owner = 0,
VideoFrameProvider* = 0);
virtual ~VideoLayerChromium();
virtual void updateContents();
virtual bool drawsContent() { return true; }
virtual void draw();
class SharedValues {
public:
explicit SharedValues(GraphicsContext3D*);
~SharedValues();
unsigned yuvShaderProgram() const { return m_yuvShaderProgram; }
unsigned rgbaShaderProgram() const { return m_rgbaShaderProgram; }
int yuvShaderMatrixLocation() const { return m_yuvShaderMatrixLocation; }
int rgbaShaderMatrixLocation() const { return m_rgbaShaderMatrixLocation; }
int yuvWidthScaleFactorLocation() const { return m_yuvWidthScaleFactorLocation; }
int rgbaWidthScaleFactorLocation() const { return m_rgbaWidthScaleFactorLocation; }
int yTextureLocation() const { return m_yTextureLocation; }
int uTextureLocation() const { return m_uTextureLocation; }
int vTextureLocation() const { return m_vTextureLocation; }
int yuvAlphaLocation() const { return m_yuvAlphaLocation; }
int rgbaAlphaLocation() const { return m_rgbaAlphaLocation; }
int rgbaTextureLocation() const { return m_rgbaTextureLocation; }
int ccMatrixLocation() const { return m_ccMatrixLocation; }
bool initialized() const { return m_initialized; };
private:
GraphicsContext3D* m_context;
unsigned m_yuvShaderProgram;
unsigned m_rgbaShaderProgram;
int m_yuvShaderMatrixLocation;
int m_yuvWidthScaleFactorLocation;
int m_rgbaShaderMatrixLocation;
int m_rgbaWidthScaleFactorLocation;
int m_ccMatrixLocation;
int m_yTextureLocation;
int m_uTextureLocation;
int m_vTextureLocation;
int m_rgbaTextureLocation;
int m_yuvAlphaLocation;
int m_rgbaAlphaLocation;
bool m_initialized;
};
private:
VideoLayerChromium(GraphicsLayerChromium* owner, VideoFrameProvider*);
static unsigned determineTextureFormat(VideoFrameChromium*);
bool allocateTexturesIfNeeded(GraphicsContext3D*, VideoFrameChromium*, unsigned textureFormat);
void updateYUVContents(GraphicsContext3D*, const VideoFrameChromium*);
void updateRGBAContents(GraphicsContext3D*, const VideoFrameChromium*);
void allocateTexture(GraphicsContext3D*, unsigned textureId, const IntSize& dimensions, unsigned textureFormat);
void updateTexture(GraphicsContext3D*, unsigned textureId, const IntSize& dimensions, unsigned textureFormat, const void* data);
void drawYUV(const SharedValues*);
void drawRGBA(const SharedValues*);
static const float yuv2RGB[9];
bool m_skipsDraw;
VideoFrameChromium::Format m_frameFormat;
OwnPtr<VideoFrameProvider> m_provider;
unsigned m_textures[3];
IntSize m_textureSizes[3];
IntSize m_frameSizes[3];
};
}
#endif // USE(ACCELERATED_COMPOSITING)
#endif
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