1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 // Renderbuffer.h: Defines the wrapper class Renderbuffer, as well as the 16 // class hierarchy used to store its contents: RenderbufferStorage, Colorbuffer, 17 // DepthStencilbuffer, Depthbuffer and Stencilbuffer. Implements GL renderbuffer 18 // objects and related functionality. [OpenGL ES 2.0.24] section 4.4.3 page 108. 19 20 #ifndef LIBGLES_CM_RENDERBUFFER_H_ 21 #define LIBGLES_CM_RENDERBUFFER_H_ 22 23 #include "common/Object.hpp" 24 #include "common/Image.hpp" 25 26 #include <GLES/gl.h> 27 28 namespace es1 29 { 30 class Texture2D; 31 class Renderbuffer; 32 class Colorbuffer; 33 class DepthStencilbuffer; 34 35 class RenderbufferInterface 36 { 37 public: 38 RenderbufferInterface(); 39 40 virtual ~RenderbufferInterface() {}; 41 42 virtual void addProxyRef(const Renderbuffer *proxy); 43 virtual void releaseProxy(const Renderbuffer *proxy); 44 45 virtual egl::Image *getRenderTarget() = 0; 46 virtual egl::Image *createSharedImage() = 0; 47 virtual bool isShared() const = 0; 48 49 virtual GLsizei getWidth() const = 0; 50 virtual GLsizei getHeight() const = 0; 51 virtual GLenum getFormat() const = 0; 52 virtual sw::Format getInternalFormat() const = 0; 53 virtual GLsizei getSamples() const = 0; 54 55 GLuint getRedSize() const; 56 GLuint getGreenSize() const; 57 GLuint getBlueSize() const; 58 GLuint getAlphaSize() const; 59 GLuint getDepthSize() const; 60 GLuint getStencilSize() const; 61 }; 62 63 class RenderbufferTexture2D : public RenderbufferInterface 64 { 65 public: 66 RenderbufferTexture2D(Texture2D *texture); 67 68 virtual ~RenderbufferTexture2D(); 69 70 virtual void addProxyRef(const Renderbuffer *proxy); 71 virtual void releaseProxy(const Renderbuffer *proxy); 72 73 virtual egl::Image *getRenderTarget(); 74 virtual egl::Image *createSharedImage(); 75 virtual bool isShared() const; 76 77 virtual GLsizei getWidth() const; 78 virtual GLsizei getHeight() const; 79 virtual GLenum getFormat() const; 80 virtual sw::Format getInternalFormat() const; 81 virtual GLsizei getSamples() const; 82 83 private: 84 gl::BindingPointer<Texture2D> mTexture2D; 85 }; 86 87 // A class derived from RenderbufferStorage is created whenever glRenderbufferStorage 88 // is called. The specific concrete type depends on whether the internal format is 89 // colour depth, stencil or packed depth/stencil. 90 class RenderbufferStorage : public RenderbufferInterface 91 { 92 public: 93 RenderbufferStorage(); 94 95 virtual ~RenderbufferStorage() = 0; 96 97 virtual egl::Image *getRenderTarget() = 0; 98 virtual egl::Image *createSharedImage() = 0; 99 virtual bool isShared() const = 0; 100 101 virtual GLsizei getWidth() const; 102 virtual GLsizei getHeight() const; 103 virtual GLenum getFormat() const; 104 virtual sw::Format getInternalFormat() const; 105 virtual GLsizei getSamples() const; 106 107 protected: 108 GLsizei mWidth; 109 GLsizei mHeight; 110 GLenum format; 111 sw::Format internalFormat; 112 GLsizei mSamples; 113 }; 114 115 // Renderbuffer implements the GL renderbuffer object. 116 // It's only a proxy for a RenderbufferInterface instance; the internal object 117 // can change whenever glRenderbufferStorage is called. 118 class Renderbuffer : public gl::NamedObject 119 { 120 public: 121 Renderbuffer(GLuint name, RenderbufferInterface *storage); 122 123 virtual ~Renderbuffer(); 124 125 // These functions from Object are overloaded here because 126 // Textures need to maintain their own count of references to them via 127 // Renderbuffers/RenderbufferTextures. These functions invoke those 128 // reference counting functions on the RenderbufferInterface. 129 virtual void addRef(); 130 virtual void release(); 131 132 egl::Image *getRenderTarget(); 133 virtual egl::Image *createSharedImage(); 134 virtual bool isShared() const; 135 136 GLsizei getWidth() const; 137 GLsizei getHeight() const; 138 GLenum getFormat() const; 139 sw::Format getInternalFormat() const; 140 GLuint getRedSize() const; 141 GLuint getGreenSize() const; 142 GLuint getBlueSize() const; 143 GLuint getAlphaSize() const; 144 GLuint getDepthSize() const; 145 GLuint getStencilSize() const; 146 GLsizei getSamples() const; 147 148 void setStorage(RenderbufferStorage *newStorage); 149 150 private: 151 RenderbufferInterface *mInstance; 152 }; 153 154 class Colorbuffer : public RenderbufferStorage 155 { 156 public: 157 explicit Colorbuffer(egl::Image *renderTarget); 158 Colorbuffer(GLsizei width, GLsizei height, GLenum format, GLsizei samples); 159 160 virtual ~Colorbuffer(); 161 162 virtual egl::Image *getRenderTarget(); 163 virtual egl::Image *createSharedImage(); 164 virtual bool isShared() const; 165 166 private: 167 egl::Image *mRenderTarget; 168 }; 169 170 class DepthStencilbuffer : public RenderbufferStorage 171 { 172 public: 173 explicit DepthStencilbuffer(egl::Image *depthStencil); 174 DepthStencilbuffer(GLsizei width, GLsizei height, GLsizei samples); 175 176 ~DepthStencilbuffer(); 177 178 virtual egl::Image *getRenderTarget(); 179 virtual egl::Image *createSharedImage(); 180 virtual bool isShared() const; 181 182 protected: 183 egl::Image *mDepthStencil; 184 }; 185 186 class Depthbuffer : public DepthStencilbuffer 187 { 188 public: 189 explicit Depthbuffer(egl::Image *depthStencil); 190 Depthbuffer(GLsizei width, GLsizei height, GLsizei samples); 191 192 virtual ~Depthbuffer(); 193 }; 194 195 class Stencilbuffer : public DepthStencilbuffer 196 { 197 public: 198 explicit Stencilbuffer(egl::Image *depthStencil); 199 Stencilbuffer(GLsizei width, GLsizei height, GLsizei samples); 200 201 virtual ~Stencilbuffer(); 202 }; 203 } 204 205 #endif // LIBGLES_CM_RENDERBUFFER_H_ 206
