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 #define WIN32_LEAN_AND_MEAN 13 #include <Windows.h> 14 #include <GL/GL.h> 15 16 /* 17 * Windows makes the GL funcs all be __stdcall instead of __cdecl :( 18 * This implementation will only work if GR_GL_FUNCTION_TYPE is __stdcall. 19 * Otherwise, a springboard would be needed that hides the calling convention. 20 */ 21 22 #define GR_GL_GET_PROC(F) interface->f ## F = (GrGL ## F ## Proc) wglGetProcAddress("gl" #F); 23 #define GR_GL_GET_PROC_SUFFIX(F, S) interface->f ## F = (GrGL ## F ## Proc) wglGetProcAddress("gl" #F #S); 24 25 const GrGLInterface* GrGLCreateNativeInterface() { 26 // wglGetProcAddress requires a context. 27 // GL Function pointers retrieved in one context may not be valid in another 28 // context. For that reason we create a new GrGLInterface each time we're 29 // called. 30 if (NULL != wglGetCurrentContext()) { 31 const char* versionString = (const char*) glGetString(GL_VERSION); 32 const char* extString = (const char*) glGetString(GL_EXTENSIONS); 33 GrGLVersion glVer = GrGLGetVersionFromString(versionString); 34 35 if (glVer < GR_GL_VER(1,5)) { 36 // We must have array and element_array buffer objects. 37 return NULL; 38 } 39 GrGLInterface* interface = new GrGLInterface(); 40 41 // Functions that are part of GL 1.1 will return NULL in 42 // wglGetProcAddress 43 interface->fBindTexture = glBindTexture; 44 interface->fBlendFunc = glBlendFunc; 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 interface->fClear = glClear; 53 interface->fClearColor = glClearColor; 54 interface->fClearStencil = glClearStencil; 55 interface->fColorMask = glColorMask; 56 interface->fCullFace = glCullFace; 57 interface->fDeleteTextures = glDeleteTextures; 58 interface->fDepthMask = glDepthMask; 59 interface->fDisable = glDisable; 60 interface->fDrawArrays = glDrawArrays; 61 interface->fDrawElements = glDrawElements; 62 interface->fDrawBuffer = glDrawBuffer; 63 interface->fEnable = glEnable; 64 interface->fFrontFace = glFrontFace; 65 interface->fFinish = glFinish; 66 interface->fFlush = glFlush; 67 interface->fGenTextures = glGenTextures; 68 interface->fGetError = glGetError; 69 interface->fGetIntegerv = glGetIntegerv; 70 interface->fGetString = glGetString; 71 interface->fGetTexLevelParameteriv = glGetTexLevelParameteriv; 72 interface->fLineWidth = glLineWidth; 73 interface->fLoadIdentity = glLoadIdentity; 74 interface->fLoadMatrixf = glLoadMatrixf; 75 interface->fMatrixMode = glMatrixMode; 76 interface->fPixelStorei = glPixelStorei; 77 interface->fReadBuffer = glReadBuffer; 78 interface->fReadPixels = glReadPixels; 79 interface->fScissor = glScissor; 80 interface->fStencilFunc = glStencilFunc; 81 interface->fStencilMask = glStencilMask; 82 interface->fStencilOp = glStencilOp; 83 interface->fTexImage2D = glTexImage2D; 84 interface->fTexParameteri = glTexParameteri; 85 interface->fTexParameteriv = glTexParameteriv; 86 if (glVer >= GR_GL_VER(4,2) || 87 GrGLHasExtensionFromString("GL_ARB_texture_storage", extString)) { 88 GR_GL_GET_PROC(TexStorage2D); 89 } else if (GrGLHasExtensionFromString("GL_EXT_texture_storage", extString)) { 90 GR_GL_GET_PROC_SUFFIX(TexStorage2D, EXT); 91 } 92 interface->fTexSubImage2D = glTexSubImage2D; 93 interface->fViewport = glViewport; 94 95 GR_GL_GET_PROC(ActiveTexture); 96 GR_GL_GET_PROC(AttachShader); 97 GR_GL_GET_PROC(BeginQuery); 98 GR_GL_GET_PROC(BindAttribLocation); 99 GR_GL_GET_PROC(BindBuffer); 100 GR_GL_GET_PROC(BindFragDataLocation); 101 GR_GL_GET_PROC(BufferData); 102 GR_GL_GET_PROC(BufferSubData); 103 GR_GL_GET_PROC(CompileShader); 104 GR_GL_GET_PROC(CompressedTexImage2D); 105 GR_GL_GET_PROC(CreateProgram); 106 GR_GL_GET_PROC(CreateShader); 107 GR_GL_GET_PROC(DeleteBuffers); 108 GR_GL_GET_PROC(DeleteQueries); 109 GR_GL_GET_PROC(DeleteProgram); 110 GR_GL_GET_PROC(DeleteShader); 111 GR_GL_GET_PROC(DisableVertexAttribArray); 112 GR_GL_GET_PROC(DrawBuffers); 113 GR_GL_GET_PROC(EnableVertexAttribArray); 114 GR_GL_GET_PROC(EndQuery); 115 GR_GL_GET_PROC(GenBuffers); 116 GR_GL_GET_PROC(GenQueries); 117 GR_GL_GET_PROC(GetBufferParameteriv); 118 GR_GL_GET_PROC(GetQueryiv); 119 GR_GL_GET_PROC(GetQueryObjectiv); 120 GR_GL_GET_PROC(GetQueryObjectuiv); 121 if (glVer > GR_GL_VER(3,3) || 122 GrGLHasExtensionFromString("GL_ARB_timer_query", extString)) { 123 GR_GL_GET_PROC(GetQueryObjecti64v); 124 GR_GL_GET_PROC(GetQueryObjectui64v); 125 GR_GL_GET_PROC(QueryCounter); 126 } else if (GrGLHasExtensionFromString("GL_EXT_timer_query", extString)) { 127 GR_GL_GET_PROC_SUFFIX(GetQueryObjecti64v, EXT); 128 GR_GL_GET_PROC_SUFFIX(GetQueryObjectui64v, EXT); 129 } 130 GR_GL_GET_PROC(GetProgramInfoLog); 131 GR_GL_GET_PROC(GetProgramiv); 132 GR_GL_GET_PROC(GetShaderInfoLog); 133 GR_GL_GET_PROC(GetShaderiv); 134 GR_GL_GET_PROC(GetUniformLocation); 135 GR_GL_GET_PROC(LinkProgram); 136 if (GrGLHasExtensionFromString("GL_NV_framebuffer_multisample_coverage", extString)) { 137 GR_GL_GET_PROC_SUFFIX(RenderbufferStorageMultisampleCoverage, NV); 138 } 139 GR_GL_GET_PROC(ShaderSource); 140 GR_GL_GET_PROC(StencilFuncSeparate); 141 GR_GL_GET_PROC(StencilMaskSeparate); 142 GR_GL_GET_PROC(StencilOpSeparate); 143 GR_GL_GET_PROC(Uniform1f); 144 GR_GL_GET_PROC(Uniform1i); 145 GR_GL_GET_PROC(Uniform1fv); 146 GR_GL_GET_PROC(Uniform1iv); 147 GR_GL_GET_PROC(Uniform2f); 148 GR_GL_GET_PROC(Uniform2i); 149 GR_GL_GET_PROC(Uniform2fv); 150 GR_GL_GET_PROC(Uniform2iv); 151 GR_GL_GET_PROC(Uniform3f); 152 GR_GL_GET_PROC(Uniform3i); 153 GR_GL_GET_PROC(Uniform3fv); 154 GR_GL_GET_PROC(Uniform3iv); 155 GR_GL_GET_PROC(Uniform4f); 156 GR_GL_GET_PROC(Uniform4i); 157 GR_GL_GET_PROC(Uniform4fv); 158 GR_GL_GET_PROC(Uniform4iv); 159 GR_GL_GET_PROC(UniformMatrix2fv); 160 GR_GL_GET_PROC(UniformMatrix3fv); 161 GR_GL_GET_PROC(UniformMatrix4fv); 162 GR_GL_GET_PROC(UseProgram); 163 GR_GL_GET_PROC(VertexAttrib4fv); 164 GR_GL_GET_PROC(VertexAttribPointer); 165 GR_GL_GET_PROC(BindFragDataLocationIndexed); 166 167 // First look for GL3.0 FBO or GL_ARB_framebuffer_object (same since 168 // GL_ARB_framebuffer_object doesn't use ARB suffix.) 169 if (glVer > GR_GL_VER(3,0) || 170 GrGLHasExtensionFromString("GL_ARB_framebuffer_object", extString)) { 171 GR_GL_GET_PROC(GenFramebuffers); 172 GR_GL_GET_PROC(GetFramebufferAttachmentParameteriv); 173 GR_GL_GET_PROC(GetRenderbufferParameteriv); 174 GR_GL_GET_PROC(BindFramebuffer); 175 GR_GL_GET_PROC(FramebufferTexture2D); 176 GR_GL_GET_PROC(CheckFramebufferStatus); 177 GR_GL_GET_PROC(DeleteFramebuffers); 178 GR_GL_GET_PROC(RenderbufferStorage); 179 GR_GL_GET_PROC(GenRenderbuffers); 180 GR_GL_GET_PROC(DeleteRenderbuffers); 181 GR_GL_GET_PROC(FramebufferRenderbuffer); 182 GR_GL_GET_PROC(BindRenderbuffer); 183 GR_GL_GET_PROC(RenderbufferStorageMultisample); 184 GR_GL_GET_PROC(BlitFramebuffer); 185 } else if (GrGLHasExtensionFromString("GL_EXT_framebuffer_object", 186 extString)) { 187 GR_GL_GET_PROC_SUFFIX(GenFramebuffers, EXT); 188 GR_GL_GET_PROC_SUFFIX(GetFramebufferAttachmentParameteriv, EXT); 189 GR_GL_GET_PROC_SUFFIX(GetRenderbufferParameteriv, EXT); 190 GR_GL_GET_PROC_SUFFIX(BindFramebuffer, EXT); 191 GR_GL_GET_PROC_SUFFIX(FramebufferTexture2D, EXT); 192 GR_GL_GET_PROC_SUFFIX(CheckFramebufferStatus, EXT); 193 GR_GL_GET_PROC_SUFFIX(DeleteFramebuffers, EXT); 194 GR_GL_GET_PROC_SUFFIX(RenderbufferStorage, EXT); 195 GR_GL_GET_PROC_SUFFIX(GenRenderbuffers, EXT); 196 GR_GL_GET_PROC_SUFFIX(DeleteRenderbuffers, EXT); 197 GR_GL_GET_PROC_SUFFIX(FramebufferRenderbuffer, EXT); 198 GR_GL_GET_PROC_SUFFIX(BindRenderbuffer, EXT); 199 if (GrGLHasExtensionFromString("GL_EXT_framebuffer_multisample", extString)) { 200 GR_GL_GET_PROC_SUFFIX(RenderbufferStorageMultisample, EXT); 201 } 202 if (GrGLHasExtensionFromString("GL_EXT_framebuffer_blit", extString)) { 203 GR_GL_GET_PROC_SUFFIX(BlitFramebuffer, EXT); 204 } 205 } else { 206 // we must have FBOs 207 delete interface; 208 return NULL; 209 } 210 GR_GL_GET_PROC(MapBuffer); 211 GR_GL_GET_PROC(UnmapBuffer); 212 213 if (GrGLHasExtensionFromString("GL_NV_path_rendering", extString)) { 214 GR_GL_GET_PROC_SUFFIX(PathCommands, NV); 215 GR_GL_GET_PROC_SUFFIX(PathCoords, NV); 216 GR_GL_GET_PROC_SUFFIX(PathSubCommands, NV); 217 GR_GL_GET_PROC_SUFFIX(PathSubCoords, NV); 218 GR_GL_GET_PROC_SUFFIX(PathString, NV); 219 GR_GL_GET_PROC_SUFFIX(PathGlyphs, NV); 220 GR_GL_GET_PROC_SUFFIX(PathGlyphRange, NV); 221 GR_GL_GET_PROC_SUFFIX(WeightPaths, NV); 222 GR_GL_GET_PROC_SUFFIX(CopyPath, NV); 223 GR_GL_GET_PROC_SUFFIX(InterpolatePaths, NV); 224 GR_GL_GET_PROC_SUFFIX(TransformPath, NV); 225 GR_GL_GET_PROC_SUFFIX(PathParameteriv, NV); 226 GR_GL_GET_PROC_SUFFIX(PathParameteri, NV); 227 GR_GL_GET_PROC_SUFFIX(PathParameterfv, NV); 228 GR_GL_GET_PROC_SUFFIX(PathParameterf, NV); 229 GR_GL_GET_PROC_SUFFIX(PathDashArray, NV); 230 GR_GL_GET_PROC_SUFFIX(GenPaths, NV); 231 GR_GL_GET_PROC_SUFFIX(DeletePaths, NV); 232 GR_GL_GET_PROC_SUFFIX(IsPath, NV); 233 GR_GL_GET_PROC_SUFFIX(PathStencilFunc, NV); 234 GR_GL_GET_PROC_SUFFIX(PathStencilDepthOffset, NV); 235 GR_GL_GET_PROC_SUFFIX(StencilFillPath, NV); 236 GR_GL_GET_PROC_SUFFIX(StencilStrokePath, NV); 237 GR_GL_GET_PROC_SUFFIX(StencilFillPathInstanced, NV); 238 GR_GL_GET_PROC_SUFFIX(StencilStrokePathInstanced, NV); 239 GR_GL_GET_PROC_SUFFIX(PathCoverDepthFunc, NV); 240 GR_GL_GET_PROC_SUFFIX(PathColorGen, NV); 241 GR_GL_GET_PROC_SUFFIX(PathTexGen, NV); 242 GR_GL_GET_PROC_SUFFIX(PathFogGen, NV); 243 GR_GL_GET_PROC_SUFFIX(CoverFillPath, NV); 244 GR_GL_GET_PROC_SUFFIX(CoverStrokePath, NV); 245 GR_GL_GET_PROC_SUFFIX(CoverFillPathInstanced, NV); 246 GR_GL_GET_PROC_SUFFIX(CoverStrokePathInstanced, NV); 247 GR_GL_GET_PROC_SUFFIX(GetPathParameteriv, NV); 248 GR_GL_GET_PROC_SUFFIX(GetPathParameterfv, NV); 249 GR_GL_GET_PROC_SUFFIX(GetPathCommands, NV); 250 GR_GL_GET_PROC_SUFFIX(GetPathCoords, NV); 251 GR_GL_GET_PROC_SUFFIX(GetPathDashArray, NV); 252 GR_GL_GET_PROC_SUFFIX(GetPathMetrics, NV); 253 GR_GL_GET_PROC_SUFFIX(GetPathMetricRange, NV); 254 GR_GL_GET_PROC_SUFFIX(GetPathSpacing, NV); 255 GR_GL_GET_PROC_SUFFIX(GetPathColorGeniv, NV); 256 GR_GL_GET_PROC_SUFFIX(GetPathColorGenfv, NV); 257 GR_GL_GET_PROC_SUFFIX(GetPathTexGeniv, NV); 258 GR_GL_GET_PROC_SUFFIX(GetPathTexGenfv, NV); 259 GR_GL_GET_PROC_SUFFIX(IsPointInFillPath, NV); 260 GR_GL_GET_PROC_SUFFIX(IsPointInStrokePath, NV); 261 GR_GL_GET_PROC_SUFFIX(GetPathLength, NV); 262 GR_GL_GET_PROC_SUFFIX(PointAlongPath, NV); 263 } 264 265 interface->fBindingsExported = kDesktop_GrGLBinding; 266 267 return interface; 268 } else { 269 return NULL; 270 } 271 } 272
