1 /* 2 Copyright 2011 Google Inc. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 #include "GrGLInterface.h" 18 19 #include <GL/glx.h> 20 #include <GL/gl.h> 21 #include <GL/glext.h> 22 #include <GL/glu.h> 23 24 #define GR_GL_GET_PROC(F) gDefaultInterface.f ## F = (GrGL ## F ## Proc) \ 25 glXGetProcAddress(reinterpret_cast<const GLubyte*>("gl" #F)); 26 #define GR_GL_GET_PROC_SUFFIX(F, S) gDefaultInterface.f ## F = (GrGL ## F ## Proc) \ 27 glXGetProcAddress(reinterpret_cast<const GLubyte*>("gl" #F #S)); 28 29 void GrGLSetDefaultGLInterface() { 30 static GrGLInterface gDefaultInterface; 31 static bool gDefaultInterfaceInit; 32 if (!gDefaultInterfaceInit && NULL != glXGetCurrentContext()) { 33 int major, minor; 34 const char* versionString = (const char*) glGetString(GL_VERSION); 35 const char* extString = (const char*) glGetString(GL_EXTENSIONS); 36 gl_version_from_string(&major, &minor, versionString); 37 38 if (major == 1 && minor < 5) { 39 // We must have array and element_array buffer objects. 40 return; 41 } 42 43 gDefaultInterface.fActiveTexture = glActiveTexture; 44 GR_GL_GET_PROC(AttachShader); 45 GR_GL_GET_PROC(BindAttribLocation); 46 GR_GL_GET_PROC(BindBuffer); 47 gDefaultInterface.fBindTexture = glBindTexture; 48 gDefaultInterface.fBlendColor = glBlendColor; 49 gDefaultInterface.fBlendFunc = glBlendFunc; 50 GR_GL_GET_PROC(BufferData); 51 GR_GL_GET_PROC(BufferSubData); 52 gDefaultInterface.fClear = glClear; 53 gDefaultInterface.fClearColor = glClearColor; 54 gDefaultInterface.fClearStencil = glClearStencil; 55 gDefaultInterface.fClientActiveTexture = glClientActiveTexture; 56 gDefaultInterface.fColorMask = glColorMask; 57 gDefaultInterface.fColorPointer = glColorPointer; 58 gDefaultInterface.fColor4ub = glColor4ub; 59 GR_GL_GET_PROC(CompileShader); 60 gDefaultInterface.fCompressedTexImage2D = glCompressedTexImage2D; 61 GR_GL_GET_PROC(CreateProgram); 62 GR_GL_GET_PROC(CreateShader); 63 gDefaultInterface.fCullFace = glCullFace; 64 GR_GL_GET_PROC(DeleteBuffers); 65 GR_GL_GET_PROC(DeleteProgram); 66 GR_GL_GET_PROC(DeleteShader); 67 gDefaultInterface.fDeleteTextures = glDeleteTextures; 68 gDefaultInterface.fDepthMask = glDepthMask; 69 gDefaultInterface.fDisable = glDisable; 70 gDefaultInterface.fDisableClientState = glDisableClientState; 71 GR_GL_GET_PROC(DisableVertexAttribArray); 72 gDefaultInterface.fDrawArrays = glDrawArrays; 73 gDefaultInterface.fDrawElements = glDrawElements; 74 gDefaultInterface.fEnable = glEnable; 75 gDefaultInterface.fEnableClientState = glEnableClientState; 76 GR_GL_GET_PROC(EnableVertexAttribArray); 77 gDefaultInterface.fFrontFace = glFrontFace; 78 GR_GL_GET_PROC(GenBuffers); 79 GR_GL_GET_PROC(GetBufferParameteriv); 80 gDefaultInterface.fGetError = glGetError; 81 gDefaultInterface.fGetIntegerv = glGetIntegerv; 82 GR_GL_GET_PROC(GetProgramInfoLog); 83 GR_GL_GET_PROC(GetProgramiv); 84 GR_GL_GET_PROC(GetShaderInfoLog); 85 GR_GL_GET_PROC(GetShaderiv); 86 gDefaultInterface.fGetString = glGetString; 87 gDefaultInterface.fGenTextures = glGenTextures; 88 GR_GL_GET_PROC(GetUniformLocation); 89 gDefaultInterface.fLineWidth = glLineWidth; 90 GR_GL_GET_PROC(LinkProgram); 91 gDefaultInterface.fLoadMatrixf = glLoadMatrixf; 92 GR_GL_GET_PROC(MapBuffer); 93 gDefaultInterface.fMatrixMode = glMatrixMode; 94 gDefaultInterface.fPointSize = glPointSize; 95 gDefaultInterface.fPixelStorei = glPixelStorei; 96 gDefaultInterface.fReadPixels = glReadPixels; 97 gDefaultInterface.fScissor = glScissor; 98 gDefaultInterface.fShadeModel = glShadeModel; 99 GR_GL_GET_PROC(ShaderSource); 100 gDefaultInterface.fStencilFunc = glStencilFunc; 101 GR_GL_GET_PROC(StencilFuncSeparate); 102 gDefaultInterface.fStencilMask = glStencilMask; 103 GR_GL_GET_PROC(StencilMaskSeparate); 104 gDefaultInterface.fStencilOp = glStencilOp; 105 GR_GL_GET_PROC(StencilOpSeparate); 106 gDefaultInterface.fTexCoordPointer = glTexCoordPointer; 107 gDefaultInterface.fTexEnvi = glTexEnvi; 108 gDefaultInterface.fTexImage2D = glTexImage2D; 109 gDefaultInterface.fTexParameteri = glTexParameteri; 110 gDefaultInterface.fTexSubImage2D = glTexSubImage2D; 111 GR_GL_GET_PROC(Uniform1f); 112 GR_GL_GET_PROC(Uniform1i); 113 GR_GL_GET_PROC(Uniform1fv); 114 GR_GL_GET_PROC(Uniform1iv); 115 GR_GL_GET_PROC(Uniform2f); 116 GR_GL_GET_PROC(Uniform2i); 117 GR_GL_GET_PROC(Uniform2fv); 118 GR_GL_GET_PROC(Uniform2iv); 119 GR_GL_GET_PROC(Uniform3f); 120 GR_GL_GET_PROC(Uniform3i); 121 GR_GL_GET_PROC(Uniform3fv); 122 GR_GL_GET_PROC(Uniform3iv); 123 GR_GL_GET_PROC(Uniform4f); 124 GR_GL_GET_PROC(Uniform4i); 125 GR_GL_GET_PROC(Uniform4fv); 126 GR_GL_GET_PROC(Uniform4iv); 127 GR_GL_GET_PROC(UniformMatrix2fv); 128 GR_GL_GET_PROC(UniformMatrix3fv); 129 GR_GL_GET_PROC(UniformMatrix4fv); 130 GR_GL_GET_PROC(UnmapBuffer); 131 GR_GL_GET_PROC(UseProgram); 132 GR_GL_GET_PROC(VertexAttrib4fv); 133 GR_GL_GET_PROC(VertexAttribPointer); 134 gDefaultInterface.fVertexPointer = glVertexPointer; 135 gDefaultInterface.fViewport = glViewport; 136 GR_GL_GET_PROC(BindFragDataLocationIndexed); 137 138 // First look for GL3.0 FBO or GL_ARB_framebuffer_object (same since 139 // GL_ARB_framebuffer_object doesn't use ARB suffix.) 140 if (major >= 3 || has_gl_extension_from_string( 141 "GL_ARB_framebuffer_object", extString)) { 142 GR_GL_GET_PROC(GenFramebuffers); 143 GR_GL_GET_PROC(BindFramebuffer); 144 GR_GL_GET_PROC(FramebufferTexture2D); 145 GR_GL_GET_PROC(CheckFramebufferStatus); 146 GR_GL_GET_PROC(DeleteFramebuffers); 147 GR_GL_GET_PROC(RenderbufferStorage); 148 GR_GL_GET_PROC(GenRenderbuffers); 149 GR_GL_GET_PROC(DeleteRenderbuffers); 150 GR_GL_GET_PROC(FramebufferRenderbuffer); 151 GR_GL_GET_PROC(BindRenderbuffer); 152 GR_GL_GET_PROC(RenderbufferStorageMultisample); 153 GR_GL_GET_PROC(BlitFramebuffer); 154 } else if (has_gl_extension_from_string("GL_EXT_framebuffer_object", 155 extString)) { 156 GR_GL_GET_PROC_SUFFIX(GenFramebuffers, EXT); 157 GR_GL_GET_PROC_SUFFIX(BindFramebuffer, EXT); 158 GR_GL_GET_PROC_SUFFIX(FramebufferTexture2D, EXT); 159 GR_GL_GET_PROC_SUFFIX(CheckFramebufferStatus, EXT); 160 GR_GL_GET_PROC_SUFFIX(DeleteFramebuffers, EXT); 161 GR_GL_GET_PROC_SUFFIX(RenderbufferStorage, EXT); 162 GR_GL_GET_PROC_SUFFIX(GenRenderbuffers, EXT); 163 GR_GL_GET_PROC_SUFFIX(DeleteRenderbuffers, EXT); 164 GR_GL_GET_PROC_SUFFIX(FramebufferRenderbuffer, EXT); 165 GR_GL_GET_PROC_SUFFIX(BindRenderbuffer, EXT); 166 if (has_gl_extension_from_string("GL_EXT_framebuffer_multisample", 167 extString)) { 168 GR_GL_GET_PROC_SUFFIX(RenderbufferStorageMultisample, EXT); 169 } 170 if (has_gl_extension_from_string("GL_EXT_framebuffer_blit", 171 extString)) { 172 GR_GL_GET_PROC_SUFFIX(BlitFramebuffer, EXT); 173 } 174 } else { 175 // we must have FBOs 176 return; 177 } 178 gDefaultInterface.fBindingsExported = kDesktop_GrGLBinding; 179 180 gDefaultInterfaceInit = true; 181 } 182 if (gDefaultInterfaceInit) 183 GrGLSetGLInterface(&gDefaultInterface); 184 } 185
