1 /* 2 * Copyright (c) 2010, Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef GLES2Canvas_h 32 #define GLES2Canvas_h 33 34 #include "AffineTransform.h" 35 #include "Color.h" 36 #include "ColorSpace.h" 37 #include "GraphicsTypes.h" 38 #include "ImageSource.h" 39 #include "LoopBlinnPathCache.h" 40 #include "Texture.h" 41 42 #include <wtf/HashMap.h> 43 #include <wtf/Noncopyable.h> 44 #include <wtf/Vector.h> 45 46 namespace WebCore { 47 48 class Color; 49 class DrawingBuffer; 50 class FloatRect; 51 class GraphicsContext3D; 52 class Path; 53 class SharedGraphicsContext3D; 54 55 class GLES2Canvas { 56 WTF_MAKE_NONCOPYABLE(GLES2Canvas); 57 public: 58 GLES2Canvas(SharedGraphicsContext3D*, DrawingBuffer*, const IntSize&); 59 ~GLES2Canvas(); 60 61 void fillPath(const Path&); 62 void fillRect(const FloatRect&, const Color&, ColorSpace); 63 void fillRect(const FloatRect&); 64 void clearRect(const FloatRect&); 65 void setFillColor(const Color&, ColorSpace); 66 void setAlpha(float alpha); 67 void setShadowColor(const Color&, ColorSpace); 68 void setShadowOffset(const FloatSize&); 69 void setShadowBlur(float); 70 void setShadowsIgnoreTransforms(bool); 71 void setCompositeOperation(CompositeOperator); 72 void translate(float x, float y); 73 void rotate(float angleInRadians); 74 void scale(const FloatSize&); 75 void concatCTM(const AffineTransform&); 76 void setCTM(const AffineTransform&); 77 void clipPath(const Path&); 78 void clipOut(const Path&); 79 80 void save(); 81 void restore(); 82 83 // non-standard functions 84 // These are not standard GraphicsContext functions, and should be pushed 85 // down into a PlatformContextGLES2 at some point. 86 87 // This version is called by the canvas->canvas draws. 88 void drawTexturedRect(unsigned texture, const IntSize& textureSize, const FloatRect& srcRect, const FloatRect& dstRect, ColorSpace, CompositeOperator); 89 // This version is called by BitmapImage::draw(). 90 void drawTexturedRect(Texture*, const FloatRect& srcRect, const FloatRect& dstRect, ColorSpace, CompositeOperator); 91 // This version is called by the above, and by the software->hardware uploads. 92 void drawTexturedRect(Texture*, const FloatRect& srcRect, const FloatRect& dstRect, const AffineTransform&, float alpha, ColorSpace, CompositeOperator, bool clip); 93 Texture* createTexture(NativeImagePtr, Texture::Format, int width, int height); 94 Texture* getTexture(NativeImagePtr); 95 context()96 SharedGraphicsContext3D* context() const { return m_context; } 97 98 void bindFramebuffer(); 99 drawingBuffer()100 DrawingBuffer* drawingBuffer() const { return m_drawingBuffer; } 101 102 private: 103 void applyState(); 104 void scissorClear(float x, float y, float width, float height); 105 void drawTexturedRectTile(Texture* texture, int tile, const FloatRect& srcRect, const FloatRect& dstRect, const AffineTransform&, float alpha); 106 void drawTexturedQuad(const IntSize& textureSize, const FloatRect& srcRect, const FloatRect& dstRect, const AffineTransform&, float alpha); 107 void drawTexturedQuadMitchell(const IntSize& textureSize, const FloatRect& srcRect, const FloatRect& dstRect, const AffineTransform&, float alpha); 108 void convolveRect(unsigned texture, const IntSize& textureSize, const FloatRect& srcRect, const FloatRect& dstRect, float imageIncrement[2], const float* kernel, int kernelWidth); 109 110 void tesselateAndFillPath(const Path&, const Color&); 111 void fillPathInternal(const Path&, const Color&); 112 void fillRectInternal(const FloatRect&, const Color&); 113 FloatRect flipRect(const FloatRect&); 114 void clearBorders(const FloatRect&, int width); 115 void beginShadowDraw(); 116 void endShadowDraw(const FloatRect& boundingBox); 117 void beginStencilDraw(unsigned op); 118 void applyClipping(bool enable); 119 void checkGLError(const char* header); 120 121 IntSize m_size; 122 123 SharedGraphicsContext3D* m_context; 124 DrawingBuffer* m_drawingBuffer; 125 126 struct State; 127 typedef WTF::Vector<State> StateVector; 128 StateVector m_stateStack; 129 State* m_state; 130 AffineTransform m_flipMatrix; 131 132 // Members for GPU-accelerated path rendering. 133 LoopBlinnPathCache m_pathCache; 134 unsigned m_pathIndexBuffer; 135 unsigned m_pathVertexBuffer; 136 }; 137 138 } 139 140 #endif // GLES2Canvas_h 141