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#include "gl/GrGLExtensions.h" 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 27 GrGLGetStringProc getString = (GrGLGetStringProc) OSMesaGetProcAddress("glGetString"); 28 GrGLGetStringiProc getStringi = (GrGLGetStringiProc) OSMesaGetProcAddress("glGetStringi"); 29 GrGLGetIntegervProc getIntegerv = 30 (GrGLGetIntegervProc) OSMesaGetProcAddress("glGetIntegerv"); 31 32 GrGLExtensions extensions; 33 if (!extensions.init(kDesktop_GrGLBinding, getString, getStringi, getIntegerv)) { 34 return NULL; 35 } 36 37 const char* versionString = (const char*) getString(GL_VERSION); 38 GrGLVersion glVer = GrGLGetVersionFromString(versionString); 39 40 if (glVer < GR_GL_VER(1,5)) { 41 // We must have array and element_array buffer objects. 42 return NULL; 43 } 44 GrGLInterface* interface = new GrGLInterface(); 45 46 GR_GL_GET_PROC(ActiveTexture); 47 GR_GL_GET_PROC(BeginQuery); 48 GR_GL_GET_PROC(AttachShader); 49 GR_GL_GET_PROC(BindAttribLocation); 50 GR_GL_GET_PROC(BindBuffer); 51 GR_GL_GET_PROC(BindFragDataLocation); 52 GR_GL_GET_PROC(BindTexture); 53 GR_GL_GET_PROC(BlendFunc); 54 55 if (glVer >= GR_GL_VER(1,4) || 56 extensions.has("GL_ARB_imaging") || 57 extensions.has("GL_EXT_blend_color")) { 58 GR_GL_GET_PROC(BlendColor); 59 } 60 61 GR_GL_GET_PROC(BufferData); 62 GR_GL_GET_PROC(BufferSubData); 63 GR_GL_GET_PROC(Clear); 64 GR_GL_GET_PROC(ClearColor); 65 GR_GL_GET_PROC(ClearStencil); 66 GR_GL_GET_PROC(ColorMask); 67 GR_GL_GET_PROC(CompileShader); 68 GR_GL_GET_PROC(CompressedTexImage2D); 69 GR_GL_GET_PROC(CopyTexSubImage2D); 70 GR_GL_GET_PROC(CreateProgram); 71 GR_GL_GET_PROC(CreateShader); 72 GR_GL_GET_PROC(CullFace); 73 GR_GL_GET_PROC(DeleteBuffers); 74 GR_GL_GET_PROC(DeleteProgram); 75 GR_GL_GET_PROC(DeleteQueries); 76 GR_GL_GET_PROC(DeleteShader); 77 GR_GL_GET_PROC(DeleteTextures); 78 GR_GL_GET_PROC(DepthMask); 79 GR_GL_GET_PROC(Disable); 80 GR_GL_GET_PROC(DisableVertexAttribArray); 81 GR_GL_GET_PROC(DrawArrays); 82 GR_GL_GET_PROC(DrawBuffer); 83 GR_GL_GET_PROC(DrawBuffers); 84 GR_GL_GET_PROC(DrawElements); 85 GR_GL_GET_PROC(Enable); 86 GR_GL_GET_PROC(EnableVertexAttribArray); 87 GR_GL_GET_PROC(EndQuery); 88 GR_GL_GET_PROC(Finish); 89 GR_GL_GET_PROC(Flush); 90 GR_GL_GET_PROC(FrontFace); 91 GR_GL_GET_PROC(GenBuffers); 92 GR_GL_GET_PROC(GenerateMipmap); 93 GR_GL_GET_PROC(GenQueries); 94 GR_GL_GET_PROC(GetBufferParameteriv); 95 GR_GL_GET_PROC(GetError); 96 GR_GL_GET_PROC(GetIntegerv); 97 GR_GL_GET_PROC(GetProgramInfoLog); 98 GR_GL_GET_PROC(GetProgramiv); 99 if (glVer >= GR_GL_VER(3,3) || extensions.has("GL_ARB_timer_query")) { 100 GR_GL_GET_PROC(GetQueryObjecti64v); 101 GR_GL_GET_PROC(GetQueryObjectui64v) 102 GR_GL_GET_PROC(QueryCounter); 103 } else if (extensions.has("GL_EXT_timer_query")) { 104 GR_GL_GET_PROC_SUFFIX(GetQueryObjecti64v, EXT); 105 GR_GL_GET_PROC_SUFFIX(GetQueryObjectui64v, EXT); 106 } 107 GR_GL_GET_PROC(GetQueryObjectiv); 108 GR_GL_GET_PROC(GetQueryObjectuiv); 109 GR_GL_GET_PROC(GetQueryiv); 110 GR_GL_GET_PROC(GetShaderInfoLog); 111 GR_GL_GET_PROC(GetShaderiv); 112 GR_GL_GET_PROC(GetString); 113 GR_GL_GET_PROC(GetStringi); 114 GR_GL_GET_PROC(GetTexLevelParameteriv); 115 GR_GL_GET_PROC(GenTextures); 116 GR_GL_GET_PROC(GetUniformLocation); 117 GR_GL_GET_PROC(LineWidth); 118 GR_GL_GET_PROC(LinkProgram); 119 GR_GL_GET_PROC(MapBuffer); 120 GR_GL_GET_PROC(PixelStorei); 121 GR_GL_GET_PROC(ReadBuffer); 122 GR_GL_GET_PROC(ReadPixels); 123 GR_GL_GET_PROC(Scissor); 124 GR_GL_GET_PROC(ShaderSource); 125 GR_GL_GET_PROC(StencilFunc); 126 GR_GL_GET_PROC(StencilFuncSeparate); 127 GR_GL_GET_PROC(StencilMask); 128 GR_GL_GET_PROC(StencilMaskSeparate); 129 GR_GL_GET_PROC(StencilOp); 130 GR_GL_GET_PROC(StencilOpSeparate); 131 GR_GL_GET_PROC(TexImage2D) 132 GR_GL_GET_PROC(TexParameteri); 133 GR_GL_GET_PROC(TexParameteriv); 134 GR_GL_GET_PROC(TexStorage2D); 135 if (NULL == interface->fTexStorage2D) { 136 GR_GL_GET_PROC_SUFFIX(TexStorage2D, EXT); 137 } 138 GR_GL_GET_PROC(TexSubImage2D); 139 GR_GL_GET_PROC(Uniform1f); 140 GR_GL_GET_PROC(Uniform1i); 141 GR_GL_GET_PROC(Uniform1fv); 142 GR_GL_GET_PROC(Uniform1iv); 143 GR_GL_GET_PROC(Uniform2f); 144 GR_GL_GET_PROC(Uniform2i); 145 GR_GL_GET_PROC(Uniform2fv); 146 GR_GL_GET_PROC(Uniform2iv); 147 GR_GL_GET_PROC(Uniform3f); 148 GR_GL_GET_PROC(Uniform3i); 149 GR_GL_GET_PROC(Uniform3fv); 150 GR_GL_GET_PROC(Uniform3iv); 151 GR_GL_GET_PROC(Uniform4f); 152 GR_GL_GET_PROC(Uniform4i); 153 GR_GL_GET_PROC(Uniform4fv); 154 GR_GL_GET_PROC(Uniform4iv); 155 GR_GL_GET_PROC(UniformMatrix2fv); 156 GR_GL_GET_PROC(UniformMatrix3fv); 157 GR_GL_GET_PROC(UniformMatrix4fv); 158 GR_GL_GET_PROC(UnmapBuffer); 159 GR_GL_GET_PROC(UseProgram); 160 GR_GL_GET_PROC(VertexAttrib4fv); 161 GR_GL_GET_PROC(VertexAttribPointer); 162 GR_GL_GET_PROC(Viewport); 163 164 if (glVer >= GR_GL_VER(3,0) || extensions.has("GL_ARB_vertex_array_object")) { 165 // no ARB suffix for GL_ARB_vertex_array_object 166 GR_GL_GET_PROC(BindVertexArray); 167 GR_GL_GET_PROC(DeleteVertexArrays); 168 GR_GL_GET_PROC(GenVertexArrays); 169 } 170 171 // First look for GL3.0 FBO or GL_ARB_framebuffer_object (same since 172 // GL_ARB_framebuffer_object doesn't use ARB suffix.) 173 if (glVer >= GR_GL_VER(3,0) || extensions.has("GL_ARB_framebuffer_object")) { 174 GR_GL_GET_PROC(GenFramebuffers); 175 GR_GL_GET_PROC(GetFramebufferAttachmentParameteriv); 176 GR_GL_GET_PROC(GetRenderbufferParameteriv); 177 GR_GL_GET_PROC(BindFramebuffer); 178 GR_GL_GET_PROC(FramebufferTexture2D); 179 GR_GL_GET_PROC(CheckFramebufferStatus); 180 GR_GL_GET_PROC(DeleteFramebuffers); 181 GR_GL_GET_PROC(RenderbufferStorage); 182 GR_GL_GET_PROC(GenRenderbuffers); 183 GR_GL_GET_PROC(DeleteRenderbuffers); 184 GR_GL_GET_PROC(FramebufferRenderbuffer); 185 GR_GL_GET_PROC(BindRenderbuffer); 186 GR_GL_GET_PROC(RenderbufferStorageMultisample); 187 GR_GL_GET_PROC(BlitFramebuffer); 188 } else if (extensions.has("GL_EXT_framebuffer_object")) { 189 GR_GL_GET_PROC_SUFFIX(GenFramebuffers, EXT); 190 GR_GL_GET_PROC_SUFFIX(GetFramebufferAttachmentParameteriv, EXT); 191 GR_GL_GET_PROC_SUFFIX(GetRenderbufferParameteriv, EXT); 192 GR_GL_GET_PROC_SUFFIX(BindFramebuffer, EXT); 193 GR_GL_GET_PROC_SUFFIX(FramebufferTexture2D, EXT); 194 GR_GL_GET_PROC_SUFFIX(CheckFramebufferStatus, EXT); 195 GR_GL_GET_PROC_SUFFIX(DeleteFramebuffers, EXT); 196 GR_GL_GET_PROC_SUFFIX(RenderbufferStorage, EXT); 197 GR_GL_GET_PROC_SUFFIX(GenRenderbuffers, EXT); 198 GR_GL_GET_PROC_SUFFIX(DeleteRenderbuffers, EXT); 199 GR_GL_GET_PROC_SUFFIX(FramebufferRenderbuffer, EXT); 200 GR_GL_GET_PROC_SUFFIX(BindRenderbuffer, EXT); 201 if (extensions.has("GL_EXT_framebuffer_multisample")) { 202 GR_GL_GET_PROC_SUFFIX(RenderbufferStorageMultisample, EXT); 203 } 204 if (extensions.has("GL_EXT_framebuffer_blit")) { 205 GR_GL_GET_PROC_SUFFIX(BlitFramebuffer, EXT); 206 } 207 } else { 208 // we must have FBOs 209 delete interface; 210 return NULL; 211 } 212 GR_GL_GET_PROC(BindFragDataLocationIndexed); 213 interface->fBindingsExported = kDesktop_GrGLBinding; 214 return interface; 215 } else { 216 return NULL; 217 } 218} 219