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 // Framebuffer.h: Defines the Framebuffer class. Implements GL framebuffer 16 // objects and related functionality. [OpenGL ES 2.0.24] section 4.4 page 105. 17 18 #ifndef LIBGLESV2_FRAMEBUFFER_H_ 19 #define LIBGLESV2_FRAMEBUFFER_H_ 20 21 #include "Context.h" 22 #include "common/Object.hpp" 23 #include "common/Image.hpp" 24 25 #include <GLES2/gl2.h> 26 27 namespace es2 28 { 29 class Renderbuffer; 30 class Colorbuffer; 31 class Depthbuffer; 32 class Stencilbuffer; 33 class DepthStencilbuffer; 34 35 class Framebuffer 36 { 37 public: 38 Framebuffer(); 39 40 virtual ~Framebuffer(); 41 42 void setColorbuffer(GLenum type, GLuint colorbuffer, GLuint index, GLint level = 0, GLint layer = 0); 43 void setDepthbuffer(GLenum type, GLuint depthbuffer, GLint level = 0, GLint layer = 0); 44 void setStencilbuffer(GLenum type, GLuint stencilbuffer, GLint level = 0, GLint layer = 0); 45 46 void setReadBuffer(GLenum buf); 47 void setDrawBuffer(GLuint index, GLenum buf); 48 GLenum getReadBuffer() const; 49 GLenum getDrawBuffer(GLuint index) const; 50 51 void detachTexture(GLuint texture); 52 void detachRenderbuffer(GLuint renderbuffer); 53 54 egl::Image *getRenderTarget(GLuint index); 55 egl::Image *getReadRenderTarget(); 56 egl::Image *getDepthBuffer(); 57 egl::Image *getStencilBuffer(); 58 59 Renderbuffer *getColorbuffer(GLuint index) const; 60 Renderbuffer *getReadColorbuffer() const; 61 Renderbuffer *getDepthbuffer() const; 62 Renderbuffer *getStencilbuffer() const; 63 64 GLenum getReadBufferType(); 65 GLenum getColorbufferType(GLuint index); 66 GLenum getDepthbufferType(); 67 GLenum getStencilbufferType(); 68 69 GLuint getColorbufferName(GLuint index); 70 GLuint getDepthbufferName(); 71 GLuint getStencilbufferName(); 72 73 GLint getColorbufferLayer(GLuint index); 74 GLint getDepthbufferLayer(); 75 GLint getStencilbufferLayer(); 76 77 bool hasStencil(); 78 79 GLenum completeness(); 80 GLenum completeness(int &width, int &height, int &samples); 81 82 GLenum getImplementationColorReadFormat() const; 83 GLenum getImplementationColorReadType() const; 84 GLenum getDepthReadFormat() const; 85 GLenum getDepthReadType() const; 86 isDefaultFramebuffer()87 virtual bool isDefaultFramebuffer() const { return false; } 88 89 static bool IsRenderbuffer(GLenum type); 90 91 protected: 92 GLuint getReadBufferIndex() const; 93 94 GLenum readBuffer; 95 GLenum drawBuffer[MAX_COLOR_ATTACHMENTS]; 96 97 GLenum mColorbufferType[MAX_COLOR_ATTACHMENTS]; 98 gl::BindingPointer<Renderbuffer> mColorbufferPointer[MAX_COLOR_ATTACHMENTS]; 99 GLint mColorbufferLayer[MAX_COLOR_ATTACHMENTS]; 100 101 GLenum mDepthbufferType; 102 gl::BindingPointer<Renderbuffer> mDepthbufferPointer; 103 GLint mDepthbufferLayer; 104 105 GLenum mStencilbufferType; 106 gl::BindingPointer<Renderbuffer> mStencilbufferPointer; 107 GLint mStencilbufferLayer; 108 109 private: 110 Renderbuffer *lookupRenderbuffer(GLenum type, GLuint handle, GLint level) const; 111 }; 112 113 class DefaultFramebuffer : public Framebuffer 114 { 115 public: 116 DefaultFramebuffer(); 117 DefaultFramebuffer(Colorbuffer *colorbuffer, DepthStencilbuffer *depthStencil); 118 isDefaultFramebuffer()119 bool isDefaultFramebuffer() const override { return true; } 120 }; 121 122 } 123 124 #endif // LIBGLESV2_FRAMEBUFFER_H_ 125