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/*
* Copyright (C) 2010, 2011, 2012 Research In Motion Limited. All rights reserved.
* 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 LayerRenderer_h
#define LayerRenderer_h
#if USE(ACCELERATED_COMPOSITING)
#include "Extensions3DOpenGLES.h"
#include "IntRect.h"
#include "LayerData.h"
#include "LayerFilterRenderer.h"
#include "TransformationMatrix.h"
#include <BlackBerryPlatformGLES2Context.h>
#include <BlackBerryPlatformIntRectRegion.h>
#include <wtf/HashSet.h>
#include <wtf/Noncopyable.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/Vector.h>
namespace WebCore {
class LayerCompositingThread;
class LayerRendererSurface;
class LayerRenderingResults {
public:
LayerRenderingResults() : wasEmpty(true), needsAnimationFrame(false) { }
void addHolePunchRect(const IntRect&);
IntRect holePunchRect(size_t index) const;
size_t holePunchRectSize() { return m_holePunchRects.size(); }
static const int NumberOfDirtyRects = 3;
const IntRect& dirtyRect(int i) const { return m_dirtyRects[i]; }
void addDirtyRect(const IntRect& dirtyRect);
bool isEmpty() const;
bool wasEmpty;
BlackBerry::Platform::IntRectRegion dirtyRegion;
bool needsAnimationFrame;
private:
Vector<IntRect> m_holePunchRects; // Rects are in compositing surface coordinates.
IntRect m_dirtyRects[NumberOfDirtyRects];
};
// Class that handles drawing of composited render layers using GL.
class LayerRenderer {
WTF_MAKE_NONCOPYABLE(LayerRenderer);
public:
static TransformationMatrix orthoMatrix(float left, float right, float bottom, float top, float nearZ, float farZ);
static PassOwnPtr<LayerRenderer> create(BlackBerry::Platform::Graphics::GLES2Context*);
LayerRenderer(BlackBerry::Platform::Graphics::GLES2Context*);
~LayerRenderer();
void releaseLayerResources();
// In order to render the layers, you must do the following 3 operations, in order.
// 1. Upload textures and other operations that should be performed at the beginning of each frame.
// Note, this call also resets the last rendering results.
void prepareFrame(double animationTime, LayerCompositingThread* rootLayer);
// 2. Set the OpenGL viewport and store other viewport-related parameters
// viewport is the GL viewport
// clipRect is an additional clip rect, if clipping is required beyond the clipping effect of the viewport.
// visibleRect is the subrect of the web page that you wish to composite, expressed in content coordinates
// The last two parameters are required to draw fixed position elements in the right place:
// layoutRect is the subrect of the web page that the WebKit thread believes is visible (scroll position, actual visible size).
// contentsSize is the contents size of the web page
void setViewport(const IntRect& viewport, const IntRect& clipRect, const FloatRect& visibleRect, const IntRect& layoutRect, const IntSize& contentsSize);
// 3. Prepares all the layers for compositing
// transform is the model-view-project matrix that goes all the way from contents to normalized device coordinates.
void compositeLayers(const TransformationMatrix&, LayerCompositingThread* rootLayer);
void compositeBuffer(const TransformationMatrix&, const FloatRect& contents, BlackBerry::Platform::Graphics::Buffer*, bool contentsOpaque, float opacity);
void drawCheckerboardPattern(const TransformationMatrix&, const FloatRect& contents);
// Keep track of layers that need cleanup when the LayerRenderer is destroyed
void addLayer(LayerCompositingThread*);
bool removeLayer(LayerCompositingThread*);
// Keep track of layers that need to release their textures when we swap buffers
void addLayerToReleaseTextureResourcesList(LayerCompositingThread*);
bool hardwareCompositing() const { return m_hardwareCompositing; }
void setClearSurfaceOnDrawLayers(bool clear) { m_clearSurfaceOnDrawLayers = clear; }
bool clearSurfaceOnDrawLayers() const { return m_clearSurfaceOnDrawLayers; }
BlackBerry::Platform::Graphics::GLES2Context* context() const { return m_context; }
const LayerRenderingResults& lastRenderingResults() const { return m_lastRenderingResults; }
// Schedule a commit on the WebKit thread at the end of rendering
// Used when a layer discovers during rendering that it needs a commit.
void setNeedsCommit() { m_needsCommit = true; }
IntRect toWebKitDocumentCoordinates(const FloatRect&) const;
// If the layer has already been drawed on a surface.
bool layerAlreadyOnSurface(LayerCompositingThread*) const;
static GLuint loadShader(GLenum type, const char* shaderSource);
static GLuint loadShaderProgram(const char* vertexShaderSource, const char* fragmentShaderSource);
private:
void prepareFrameRecursive(LayerCompositingThread*, double animationTime, bool isContextCurrent);
void updateLayersRecursive(LayerCompositingThread*, const TransformationMatrix& parentMatrix, Vector<RefPtr<LayerCompositingThread> >& surfaceLayers, float opacity, FloatRect clipRect);
void compositeLayersRecursive(LayerCompositingThread*, int stencilValue, FloatRect clipRect);
void updateScissorIfNeeded(const FloatRect& clipRect);
bool useSurface(LayerRendererSurface*);
void drawLayersOnSurfaces(const Vector<RefPtr<LayerCompositingThread> >& surfaceLayers);
void drawDebugBorder(LayerCompositingThread*);
void drawHolePunchRect(LayerCompositingThread*);
IntRect toOpenGLWindowCoordinates(const FloatRect&) const;
IntRect toWebKitWindowCoordinates(const FloatRect&) const;
void bindCommonAttribLocation(int location, const char* attribName);
bool makeContextCurrent();
bool initializeSharedGLObjects();
// GL shader program object IDs.
unsigned m_layerProgramObject[LayerData::NumberOfLayerProgramShaders];
unsigned m_layerMaskProgramObject[LayerData::NumberOfLayerProgramShaders];
unsigned m_colorProgramObject;
unsigned m_checkerProgramObject;
// Shader uniform and attribute locations.
const int m_positionLocation;
const int m_texCoordLocation;
#if ENABLE(CSS_FILTERS)
OwnPtr<LayerFilterRenderer> m_filterRenderer;
#endif
int m_samplerLocation[LayerData::NumberOfLayerProgramShaders];
int m_alphaLocation[LayerData::NumberOfLayerProgramShaders];
int m_maskSamplerLocation[LayerData::NumberOfLayerProgramShaders];
int m_maskSamplerLocationMask[LayerData::NumberOfLayerProgramShaders];
int m_maskAlphaLocation[LayerData::NumberOfLayerProgramShaders];
int m_colorColorLocation;
int m_checkerScaleLocation;
int m_checkerOriginLocation;
int m_checkerSurfaceHeightLocation;
// Current draw configuration.
double m_scale;
double m_animationTime;
FloatRect m_visibleRect;
IntRect m_layoutRect;
IntSize m_contentsSize;
IntRect m_viewport; // In render target coordinates
IntRect m_scissorRect; // In render target coordinates
FloatRect m_clipRect; // In normalized device coordinates
unsigned m_fbo;
LayerRendererSurface* m_currentLayerRendererSurface;
bool m_hardwareCompositing;
bool m_clearSurfaceOnDrawLayers;
// Map associating layers with textures ids used by the GL compositor.
typedef HashSet<LayerCompositingThread*> LayerSet;
LayerSet m_layers;
LayerSet m_layersLockingTextureResources;
BlackBerry::Platform::Graphics::GLES2Context* m_context;
bool m_isRobustnessSupported;
PFNGLGETGRAPHICSRESETSTATUSEXTPROC m_glGetGraphicsResetStatusEXT;
LayerRenderingResults m_lastRenderingResults;
bool m_needsCommit;
};
}
#endif // USE(ACCELERATED_COMPOSITING)
#endif
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