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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 LayerRendererChromium_h
#define LayerRendererChromium_h
#if USE(ACCELERATED_COMPOSITING)
#include "IntRect.h"
#include "LayerChromium.h"
#include "SkBitmap.h"
#include <wtf/HashMap.h>
#include <wtf/Noncopyable.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/Vector.h>
namespace WebCore {
class GLES2Context;
class Page;
class ShaderProgram {
public:
ShaderProgram();
unsigned m_shaderProgramId;
int m_samplerLocation;
int m_matrixLocation;
int m_alphaLocation;
};
// Class that handles drawing of composited render layers using GL.
class LayerRendererChromium : public Noncopyable {
public:
static PassOwnPtr<LayerRendererChromium> create(Page* page);
LayerRendererChromium(Page* page);
~LayerRendererChromium();
// Updates the contents of the root layer that fall inside the updateRect and recomposites
// all the layers.
void drawLayers(const IntRect& updateRect, const IntRect& visibleRect, const IntRect& contentRect, const IntPoint& scrollPosition);
void setRootLayer(PassRefPtr<LayerChromium> layer) { m_rootLayer = layer; }
LayerChromium* rootLayer() { return m_rootLayer.get(); }
void setNeedsDisplay() { m_needsDisplay = true; }
// Frees the texture associated with the given layer.
bool freeLayerTexture(LayerChromium*);
bool hardwareCompositing() const { return m_hardwareCompositing; }
void setRootLayerCanvasSize(const IntSize&);
GraphicsContext* rootLayerGraphicsContext() const { return m_rootLayerGraphicsContext.get(); }
private:
enum ShaderProgramType { DebugBorderProgram, ScrollLayerProgram, ContentLayerProgram, WebGLLayerProgram, NumShaderProgramTypes };
void updateLayersRecursive(LayerChromium* layer, const TransformationMatrix& parentMatrix, float opacity, const IntRect& visibleRect);
void drawLayer(LayerChromium*);
void drawDebugBorder(LayerChromium*, const TransformationMatrix&);
void drawTexturedQuad(const TransformationMatrix& matrix, float width, float height, float opacity);
bool isLayerVisible(LayerChromium*, const TransformationMatrix&, const IntRect& visibleRect);
bool createLayerShader(ShaderProgramType, const char* vertexShaderSource, const char* fragmentShaderSource);
void useShaderProgram(ShaderProgramType);
void bindCommonAttribLocations(ShaderProgramType);
enum VboIds { Vertices, LayerElements };
// These are here only temporarily and should be removed once we switch over to GGL
bool initGL();
bool makeContextCurrent();
bool initializeSharedGLObjects();
int getTextureId(LayerChromium*);
int assignTextureForLayer(LayerChromium*);
ShaderProgram m_shaderPrograms[NumShaderProgramTypes];
unsigned m_rootLayerTextureId;
int m_rootLayerTextureWidth;
int m_rootLayerTextureHeight;
// Shader uniform and attribute locations.
const int m_positionLocation;
const int m_texCoordLocation;
int m_samplerLocation;
int m_matrixLocation;
int m_alphaLocation;
int m_borderColorLocation;
unsigned m_quadVboIds[3];
TransformationMatrix m_projectionMatrix;
RefPtr<LayerChromium> m_rootLayer;
Vector<LayerChromium*> m_layerList;
bool m_needsDisplay;
IntPoint m_scrollPosition;
bool m_hardwareCompositing;
ShaderProgramType m_currentShaderProgramType;
// Map associating layers with textures ids used by the GL compositor.
typedef HashMap<LayerChromium*, unsigned> TextureIdMap;
TextureIdMap m_textureIdMap;
#if PLATFORM(SKIA)
OwnPtr<skia::PlatformCanvas> m_rootLayerCanvas;
OwnPtr<PlatformContextSkia> m_rootLayerSkiaContext;
OwnPtr<GraphicsContext> m_rootLayerGraphicsContext;
#endif
IntSize m_rootLayerCanvasSize;
OwnPtr<GLES2Context> m_gles2Context;
// The WebCore Page that the compositor renders into.
Page* m_page;
};
}
#endif // USE(ACCELERATED_COMPOSITING)
#endif
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