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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 GraphicsContextGPU_h
#define GraphicsContextGPU_h
#include "AffineTransform.h"
#include "Color.h"
#include "ColorSpace.h"
#include "GraphicsTypes.h"
#include "ImageSource.h"
#include "LoopBlinnPathCache.h"
#include "Texture.h"
#include <wtf/HashMap.h>
#include <wtf/Noncopyable.h>
#include <wtf/Vector.h>
namespace WebCore {
class Color;
class DrawingBuffer;
class FloatRect;
class GraphicsContext3D;
class Path;
class SharedGraphicsContext3D;
class GraphicsContextGPU {
WTF_MAKE_NONCOPYABLE(GraphicsContextGPU);
public:
GraphicsContextGPU(SharedGraphicsContext3D*, DrawingBuffer*, const IntSize&);
~GraphicsContextGPU();
void fillPath(const Path&);
void fillRect(const FloatRect&, const Color&, ColorSpace);
void fillRect(const FloatRect&);
void clearRect(const FloatRect&);
void setFillColor(const Color&, ColorSpace);
void setAlpha(float alpha);
void setShadowColor(const Color&, ColorSpace);
void setShadowOffset(const FloatSize&);
void setShadowBlur(float);
void setShadowsIgnoreTransforms(bool);
void setCompositeOperation(CompositeOperator);
void translate(float x, float y);
void rotate(float angleInRadians);
void scale(const FloatSize&);
void concatCTM(const AffineTransform&);
void setCTM(const AffineTransform&);
void clipPath(const Path&);
void clipOut(const Path&);
void save();
void restore();
// non-standard functions
// These are not standard GraphicsContext functions, and should be pushed
// down into a PlatformContextGLES2 at some point.
// This version is called by the canvas->canvas draws.
void drawTexturedRect(unsigned texture, const IntSize& textureSize, const FloatRect& srcRect, const FloatRect& dstRect, ColorSpace, CompositeOperator);
// This version is called by BitmapImage::draw().
void drawTexturedRect(Texture*, const FloatRect& srcRect, const FloatRect& dstRect, ColorSpace, CompositeOperator);
// This version is called by the above, and by the software->hardware uploads.
void drawTexturedRect(Texture*, const FloatRect& srcRect, const FloatRect& dstRect, const AffineTransform&, float alpha, ColorSpace, CompositeOperator, bool clip);
Texture* createTexture(NativeImagePtr, Texture::Format, int width, int height);
Texture* getTexture(NativeImagePtr);
SharedGraphicsContext3D* context() const { return m_context; }
void bindFramebuffer();
DrawingBuffer* drawingBuffer() const { return m_drawingBuffer; }
private:
void applyState();
void scissorClear(float x, float y, float width, float height);
void drawTexturedRectTile(Texture* texture, int tile, const FloatRect& srcRect, const FloatRect& dstRect, const AffineTransform&, float alpha);
void drawTexturedQuad(const IntSize& textureSize, const FloatRect& srcRect, const FloatRect& dstRect, const AffineTransform&, float alpha);
void drawTexturedQuadMitchell(const IntSize& textureSize, const FloatRect& srcRect, const FloatRect& dstRect, const AffineTransform&, float alpha);
void convolveRect(unsigned texture, const IntSize& textureSize, const FloatRect& srcRect, const FloatRect& dstRect, float imageIncrement[2], const float* kernel, int kernelWidth);
void tesselateAndFillPath(const Path&, const Color&);
void fillPathInternal(const Path&, const Color&);
void fillRectInternal(const FloatRect&, const Color&);
FloatRect flipRect(const FloatRect&);
void clearBorders(const FloatRect&, int width);
void beginShadowDraw();
void endShadowDraw(const FloatRect& boundingBox);
void beginStencilDraw(unsigned op);
void applyClipping(bool enable);
void checkGLError(const char* header);
IntSize m_size;
SharedGraphicsContext3D* m_context;
DrawingBuffer* m_drawingBuffer;
struct State;
typedef WTF::Vector<State> StateVector;
StateVector m_stateStack;
State* m_state;
AffineTransform m_flipMatrix;
// Members for GPU-accelerated path rendering.
LoopBlinnPathCache m_pathCache;
unsigned m_pathIndexBuffer;
unsigned m_pathVertexBuffer;
};
}
#endif // GraphicsContextGPU_h
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