1 2/* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10#include "gl/GrGLInterface.h" 11#include "../GrGLUtil.h" 12 13#define GL_GLEXT_PROTOTYPES 14#include "osmesa_wrapper.h" 15 16#define GR_GL_GET_PROC(F) interface->f ## F = (GrGL ## F ## Proc) \ 17 OSMesaGetProcAddress("gl" #F); 18#define GR_GL_GET_PROC_SUFFIX(F, S) interface->f ## F = (GrGL ## F ## Proc) \ 19 OSMesaGetProcAddress("gl" #F #S); 20 21// We use OSMesaGetProcAddress for every gl function to avoid accidentally using 22// non-Mesa gl functions. 23 24const GrGLInterface* GrGLCreateMesaInterface() { 25 if (NULL != OSMesaGetCurrentContext()) { 26 GrGLGetStringProc getString = (GrGLGetStringProc) OSMesaGetProcAddress("glGetString"); 27 const char* versionString = (const char*) getString(GL_VERSION); 28 const char* extString = (const char*) getString(GL_EXTENSIONS); 29 GrGLVersion glVer = GrGLGetVersionFromString(versionString); 30 31 if (glVer < GR_GL_VER(1,5)) { 32 // We must have array and element_array buffer objects. 33 return NULL; 34 } 35 GrGLInterface* interface = new GrGLInterface(); 36 37 GR_GL_GET_PROC(ActiveTexture); 38 GR_GL_GET_PROC(BeginQuery); 39 GR_GL_GET_PROC(AttachShader); 40 GR_GL_GET_PROC(BindAttribLocation); 41 GR_GL_GET_PROC(BindBuffer); 42 GR_GL_GET_PROC(BindFragDataLocation); 43 GR_GL_GET_PROC(BindTexture); 44 GR_GL_GET_PROC(BlendFunc); 45 46 if (glVer >= GR_GL_VER(1,4) || 47 GrGLHasExtensionFromString("GL_ARB_imaging", extString) || 48 GrGLHasExtensionFromString("GL_EXT_blend_color", extString)) { 49 GR_GL_GET_PROC(BlendColor); 50 } 51 52 GR_GL_GET_PROC(BufferData); 53 GR_GL_GET_PROC(BufferSubData); 54 GR_GL_GET_PROC(Clear); 55 GR_GL_GET_PROC(ClearColor); 56 GR_GL_GET_PROC(ClearStencil); 57 GR_GL_GET_PROC(ColorMask); 58 GR_GL_GET_PROC(CompileShader); 59 GR_GL_GET_PROC(CompressedTexImage2D); 60 GR_GL_GET_PROC(CreateProgram); 61 GR_GL_GET_PROC(CreateShader); 62 GR_GL_GET_PROC(CullFace); 63 GR_GL_GET_PROC(DeleteBuffers); 64 GR_GL_GET_PROC(DeleteProgram); 65 GR_GL_GET_PROC(DeleteQueries); 66 GR_GL_GET_PROC(DeleteShader); 67 GR_GL_GET_PROC(DeleteTextures); 68 GR_GL_GET_PROC(DepthMask); 69 GR_GL_GET_PROC(Disable); 70 GR_GL_GET_PROC(DisableVertexAttribArray); 71 GR_GL_GET_PROC(DrawArrays); 72 GR_GL_GET_PROC(DrawBuffer); 73 GR_GL_GET_PROC(DrawBuffers); 74 GR_GL_GET_PROC(DrawElements); 75 GR_GL_GET_PROC(Enable); 76 GR_GL_GET_PROC(EnableVertexAttribArray); 77 GR_GL_GET_PROC(EndQuery); 78 GR_GL_GET_PROC(Finish); 79 GR_GL_GET_PROC(Flush); 80 GR_GL_GET_PROC(FrontFace); 81 GR_GL_GET_PROC(GenBuffers); 82 GR_GL_GET_PROC(GenQueries); 83 GR_GL_GET_PROC(GetBufferParameteriv); 84 GR_GL_GET_PROC(GetError); 85 GR_GL_GET_PROC(GetIntegerv); 86 GR_GL_GET_PROC(GetProgramInfoLog); 87 GR_GL_GET_PROC(GetProgramiv); 88 if (glVer >= GR_GL_VER(3,3) || 89 GrGLHasExtensionFromString("GL_ARB_timer_query", extString)) { 90 GR_GL_GET_PROC(GetQueryObjecti64v); 91 GR_GL_GET_PROC(GetQueryObjectui64v) 92 GR_GL_GET_PROC(QueryCounter); 93 } else if (GrGLHasExtensionFromString("GL_EXT_timer_query", extString)) { 94 GR_GL_GET_PROC_SUFFIX(GetQueryObjecti64v, EXT); 95 GR_GL_GET_PROC_SUFFIX(GetQueryObjectui64v, EXT); 96 } 97 GR_GL_GET_PROC(GetQueryObjectiv); 98 GR_GL_GET_PROC(GetQueryObjectuiv); 99 GR_GL_GET_PROC(GetQueryiv); 100 GR_GL_GET_PROC(GetShaderInfoLog); 101 GR_GL_GET_PROC(GetShaderiv); 102 GR_GL_GET_PROC(GetString); 103 GR_GL_GET_PROC(GetTexLevelParameteriv); 104 GR_GL_GET_PROC(GenTextures); 105 GR_GL_GET_PROC(GetUniformLocation); 106 GR_GL_GET_PROC(LineWidth); 107 GR_GL_GET_PROC(LinkProgram); 108 GR_GL_GET_PROC(MapBuffer); 109 GR_GL_GET_PROC(PixelStorei); 110 GR_GL_GET_PROC(ReadBuffer); 111 GR_GL_GET_PROC(ReadPixels); 112 GR_GL_GET_PROC(Scissor); 113 GR_GL_GET_PROC(ShaderSource); 114 GR_GL_GET_PROC(StencilFunc); 115 GR_GL_GET_PROC(StencilFuncSeparate); 116 GR_GL_GET_PROC(StencilMask); 117 GR_GL_GET_PROC(StencilMaskSeparate); 118 GR_GL_GET_PROC(StencilOp); 119 GR_GL_GET_PROC(StencilOpSeparate); 120 GR_GL_GET_PROC(TexImage2D) 121 GR_GL_GET_PROC(TexParameteri); 122 GR_GL_GET_PROC(TexParameteriv); 123 GR_GL_GET_PROC(TexStorage2D); 124 if (NULL == interface->fTexStorage2D) { 125 GR_GL_GET_PROC_SUFFIX(TexStorage2D, EXT); 126 } 127 GR_GL_GET_PROC(TexSubImage2D); 128 GR_GL_GET_PROC(Uniform1f); 129 GR_GL_GET_PROC(Uniform1i); 130 GR_GL_GET_PROC(Uniform1fv); 131 GR_GL_GET_PROC(Uniform1iv); 132 GR_GL_GET_PROC(Uniform2f); 133 GR_GL_GET_PROC(Uniform2i); 134 GR_GL_GET_PROC(Uniform2fv); 135 GR_GL_GET_PROC(Uniform2iv); 136 GR_GL_GET_PROC(Uniform3f); 137 GR_GL_GET_PROC(Uniform3i); 138 GR_GL_GET_PROC(Uniform3fv); 139 GR_GL_GET_PROC(Uniform3iv); 140 GR_GL_GET_PROC(Uniform4f); 141 GR_GL_GET_PROC(Uniform4i); 142 GR_GL_GET_PROC(Uniform4fv); 143 GR_GL_GET_PROC(Uniform4iv); 144 GR_GL_GET_PROC(UniformMatrix2fv); 145 GR_GL_GET_PROC(UniformMatrix3fv); 146 GR_GL_GET_PROC(UniformMatrix4fv); 147 GR_GL_GET_PROC(UnmapBuffer); 148 GR_GL_GET_PROC(UseProgram); 149 GR_GL_GET_PROC(VertexAttrib4fv); 150 GR_GL_GET_PROC(VertexAttribPointer); 151 GR_GL_GET_PROC(Viewport); 152 153 // First look for GL3.0 FBO or GL_ARB_framebuffer_object (same since 154 // GL_ARB_framebuffer_object doesn't use ARB suffix.) 155 if (glVer >= GR_GL_VER(3,0) || 156 GrGLHasExtensionFromString("GL_ARB_framebuffer_object", 157 extString)) { 158 GR_GL_GET_PROC(GenFramebuffers); 159 GR_GL_GET_PROC(GetFramebufferAttachmentParameteriv); 160 GR_GL_GET_PROC(GetRenderbufferParameteriv); 161 GR_GL_GET_PROC(BindFramebuffer); 162 GR_GL_GET_PROC(FramebufferTexture2D); 163 GR_GL_GET_PROC(CheckFramebufferStatus); 164 GR_GL_GET_PROC(DeleteFramebuffers); 165 GR_GL_GET_PROC(RenderbufferStorage); 166 GR_GL_GET_PROC(GenRenderbuffers); 167 GR_GL_GET_PROC(DeleteRenderbuffers); 168 GR_GL_GET_PROC(FramebufferRenderbuffer); 169 GR_GL_GET_PROC(BindRenderbuffer); 170 GR_GL_GET_PROC(RenderbufferStorageMultisample); 171 GR_GL_GET_PROC(BlitFramebuffer); 172 } else if (GrGLHasExtensionFromString("GL_EXT_framebuffer_object", 173 extString)) { 174 GR_GL_GET_PROC_SUFFIX(GenFramebuffers, EXT); 175 GR_GL_GET_PROC_SUFFIX(GetFramebufferAttachmentParameteriv, EXT); 176 GR_GL_GET_PROC_SUFFIX(GetRenderbufferParameteriv, EXT); 177 GR_GL_GET_PROC_SUFFIX(BindFramebuffer, EXT); 178 GR_GL_GET_PROC_SUFFIX(FramebufferTexture2D, EXT); 179 GR_GL_GET_PROC_SUFFIX(CheckFramebufferStatus, EXT); 180 GR_GL_GET_PROC_SUFFIX(DeleteFramebuffers, EXT); 181 GR_GL_GET_PROC_SUFFIX(RenderbufferStorage, EXT); 182 GR_GL_GET_PROC_SUFFIX(GenRenderbuffers, EXT); 183 GR_GL_GET_PROC_SUFFIX(DeleteRenderbuffers, EXT); 184 GR_GL_GET_PROC_SUFFIX(FramebufferRenderbuffer, EXT); 185 GR_GL_GET_PROC_SUFFIX(BindRenderbuffer, EXT); 186 if (GrGLHasExtensionFromString("GL_EXT_framebuffer_multisample", 187 extString)) { 188 GR_GL_GET_PROC_SUFFIX(RenderbufferStorageMultisample, EXT); 189 } 190 if (GrGLHasExtensionFromString("GL_EXT_framebuffer_blit", 191 extString)) { 192 GR_GL_GET_PROC_SUFFIX(BlitFramebuffer, EXT); 193 } 194 } else { 195 // we must have FBOs 196 delete interface; 197 return NULL; 198 } 199 GR_GL_GET_PROC(BindFragDataLocationIndexed); 200 interface->fBindingsExported = kDesktop_GrGLBinding; 201 return interface; 202 } else { 203 return NULL; 204 } 205} 206