progs/util/extfuncs.h

   1 /**
   2  * Utility for getting OpenGL extension function pointers
   3  * Meant to be #included.
   4  */
   5
   6 /* OpenGL 2.0 */
   7 static PFNGLATTACHSHADERPROC glAttachShader_func = NULL;
   8 static PFNGLBINDATTRIBLOCATIONPROC glBindAttribLocation_func = NULL;
   9 static PFNGLCOMPILESHADERPROC glCompileShader_func = NULL;
  10 static PFNGLCREATEPROGRAMPROC glCreateProgram_func = NULL;
  11 static PFNGLCREATESHADERPROC glCreateShader_func = NULL;
  12 static PFNGLDELETEPROGRAMPROC glDeleteProgram_func = NULL;
  13 static PFNGLDELETESHADERPROC glDeleteShader_func = NULL;
  14 static PFNGLGETACTIVEATTRIBPROC glGetActiveAttrib_func = NULL;
  15 static PFNGLGETACTIVEUNIFORMPROC glGetActiveUniform_func = NULL;
  16 static PFNGLGETATTACHEDSHADERSPROC glGetAttachedShaders_func = NULL;
  17 static PFNGLGETATTRIBLOCATIONPROC glGetAttribLocation_func = NULL;
  18 static PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog_func = NULL;
  19 static PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog_func = NULL;
  20 static PFNGLGETSHADERIVPROC glGetShaderiv_func = NULL;
  21 static PFNGLGETPROGRAMIVPROC glGetProgramiv_func = NULL;
  22 static PFNGLGETSHADERSOURCEPROC glGetShaderSource_func = NULL;
  23 static PFNGLGETUNIFORMFVPROC glGetUniformfv_func = NULL;
  24 static PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation_func = NULL;
  25 static PFNGLISPROGRAMPROC glIsProgram_func = NULL;
  26 static PFNGLISSHADERPROC glIsShader_func = NULL;
  27 static PFNGLLINKPROGRAMPROC glLinkProgram_func = NULL;
  28 static PFNGLSHADERSOURCEPROC glShaderSource_func = NULL;
  29 static PFNGLUNIFORM1IPROC glUniform1i_func = NULL;
  30 static PFNGLUNIFORM2IPROC glUniform2i_func = NULL;
  31 static PFNGLUNIFORM3IPROC glUniform3i_func = NULL;
  32 static PFNGLUNIFORM4IPROC glUniform4i_func = NULL;
  33 static PFNGLUNIFORM1FPROC glUniform1f_func = NULL;
  34 static PFNGLUNIFORM2FPROC glUniform2f_func = NULL;
  35 static PFNGLUNIFORM3FPROC glUniform3f_func = NULL;
  36 static PFNGLUNIFORM4FPROC glUniform4f_func = NULL;
  37 static PFNGLUNIFORM1FVPROC glUniform1fv_func = NULL;
  38 static PFNGLUNIFORM2FVPROC glUniform2fv_func = NULL;
  39 static PFNGLUNIFORM3FVPROC glUniform3fv_func = NULL;
  40 static PFNGLUNIFORM4FVPROC glUniform4fv_func = NULL;
  41 static PFNGLUNIFORMMATRIX2FVPROC glUniformMatrix2fv_func = NULL;
  42 static PFNGLUNIFORMMATRIX3FVPROC glUniformMatrix3fv_func = NULL;
  43 static PFNGLUNIFORMMATRIX4FVPROC glUniformMatrix4fv_func = NULL;
  44 static PFNGLUSEPROGRAMPROC glUseProgram_func = NULL;
  45 static PFNGLVERTEXATTRIB1FPROC glVertexAttrib1f_func = NULL;
  46 static PFNGLVERTEXATTRIB2FPROC glVertexAttrib2f_func = NULL;
  47 static PFNGLVERTEXATTRIB3FPROC glVertexAttrib3f_func = NULL;
  48 static PFNGLVERTEXATTRIB4FPROC glVertexAttrib4f_func = NULL;
  49 static PFNGLVERTEXATTRIB1FVPROC glVertexAttrib1fv_func = NULL;
  50 static PFNGLVERTEXATTRIB2FVPROC glVertexAttrib2fv_func = NULL;
  51 static PFNGLVERTEXATTRIB3FVPROC glVertexAttrib3fv_func = NULL;
  52 static PFNGLVERTEXATTRIB4FVPROC glVertexAttrib4fv_func = NULL;
  53 static PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer_func = NULL;
  54 static PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray_func = NULL;
  55 static PFNGLDISABLEVERTEXATTRIBARRAYPROC glDisableVertexAttribArray_func = NULL;
  56
  57 /* OpenGL 2.1 */
  58 static PFNGLUNIFORMMATRIX2X3FVPROC glUniformMatrix2x3fv_func = NULL;
  59 static PFNGLUNIFORMMATRIX3X2FVPROC glUniformMatrix3x2fv_func = NULL;
  60 static PFNGLUNIFORMMATRIX2X4FVPROC glUniformMatrix2x4fv_func = NULL;
  61 static PFNGLUNIFORMMATRIX4X2FVPROC glUniformMatrix4x2fv_func = NULL;
  62 static PFNGLUNIFORMMATRIX3X4FVPROC glUniformMatrix3x4fv_func = NULL;
  63 static PFNGLUNIFORMMATRIX4X3FVPROC glUniformMatrix4x3fv_func = NULL;
  64
  65 /* OpenGL 1.4 */
  66 static PFNGLPOINTPARAMETERFVPROC glPointParameterfv_func = NULL;
  67 static PFNGLSECONDARYCOLOR3FVPROC glSecondaryColor3fv_func = NULL;
  68
  69 /* GL_ARB_vertex/fragment_program */
  70 static PFNGLBINDPROGRAMARBPROC glBindProgramARB_func = NULL;
  71 static PFNGLDELETEPROGRAMSARBPROC glDeleteProgramsARB_func = NULL;
  72 static PFNGLGENPROGRAMSARBPROC glGenProgramsARB_func = NULL;
  73 static PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC glGetProgramLocalParameterdvARB_func = NULL;
  74 static PFNGLISPROGRAMARBPROC glIsProgramARB_func = NULL;
  75 static PFNGLPROGRAMLOCALPARAMETER4DARBPROC glProgramLocalParameter4dARB_func = NULL;
  76 static PFNGLPROGRAMLOCALPARAMETER4FVARBPROC glProgramLocalParameter4fvARB_func = NULL;
  77 static PFNGLPROGRAMSTRINGARBPROC glProgramStringARB_func = NULL;
  78 static PFNGLVERTEXATTRIB1FARBPROC glVertexAttrib1fARB_func = NULL;
  79
  80 /* GL_APPLE_vertex_array_object */
  81 static PFNGLBINDVERTEXARRAYAPPLEPROC glBindVertexArrayAPPLE_func = NULL;
  82 static PFNGLDELETEVERTEXARRAYSAPPLEPROC glDeleteVertexArraysAPPLE_func = NULL;
  83 static PFNGLGENVERTEXARRAYSAPPLEPROC glGenVertexArraysAPPLE_func = NULL;
  84 static PFNGLISVERTEXARRAYAPPLEPROC glIsVertexArrayAPPLE_func = NULL;
  85
  86 /* GL_EXT_stencil_two_side */
  87 static PFNGLACTIVESTENCILFACEEXTPROC glActiveStencilFaceEXT_func = NULL;
  88
  89 /* GL_ARB_buffer_object */
  90 static PFNGLGENBUFFERSARBPROC glGenBuffersARB_func = NULL;
  91 static PFNGLDELETEBUFFERSARBPROC glDeleteBuffersARB_func = NULL;
  92 static PFNGLBINDBUFFERARBPROC glBindBufferARB_func = NULL;
  93 static PFNGLBUFFERDATAARBPROC glBufferDataARB_func = NULL;
  94 static PFNGLBUFFERSUBDATAARBPROC glBufferSubDataARB_func = NULL;
  95 static PFNGLMAPBUFFERARBPROC glMapBufferARB_func = NULL;
  96 static PFNGLUNMAPBUFFERARBPROC glUnmapBufferARB_func = NULL;
  97
  98 /* GL_EXT_framebuffer_object */
  99 static PFNGLISRENDERBUFFEREXTPROC glIsRenderbufferEXT_func = NULL;
 100 static PFNGLBINDRENDERBUFFEREXTPROC glBindRenderbufferEXT_func = NULL;
 101 static PFNGLDELETERENDERBUFFERSEXTPROC glDeleteRenderbuffersEXT_func = NULL;
 102 static PFNGLGENRENDERBUFFERSEXTPROC glGenRenderbuffersEXT_func = NULL;
 103 static PFNGLRENDERBUFFERSTORAGEEXTPROC glRenderbufferStorageEXT_func = NULL;
 104 static PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC glGetRenderbufferParameterivEXT_func = NULL;
 105 static PFNGLISFRAMEBUFFEREXTPROC glIsFramebufferEXT_func = NULL;
 106 static PFNGLBINDFRAMEBUFFEREXTPROC glBindFramebufferEXT_func = NULL;
 107 static PFNGLDELETEFRAMEBUFFERSEXTPROC glDeleteFramebuffersEXT_func = NULL;
 108 static PFNGLGENFRAMEBUFFERSEXTPROC glGenFramebuffersEXT_func = NULL;
 109 static PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC glCheckFramebufferStatusEXT_func = NULL;
 110 static PFNGLFRAMEBUFFERTEXTURE1DEXTPROC glFramebufferTexture1DEXT_func = NULL;
 111 static PFNGLFRAMEBUFFERTEXTURE2DEXTPROC glFramebufferTexture2DEXT_func = NULL;
 112 static PFNGLFRAMEBUFFERTEXTURE3DEXTPROC glFramebufferTexture3DEXT_func = NULL;
 113 static PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC glFramebufferRenderbufferEXT_func = NULL;
 114 static PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC glGetFramebufferAttachmentParameterivEXT_func = NULL;
 115 static PFNGLGENERATEMIPMAPEXTPROC glGenerateMipmapEXT_func = NULL;
 116
 117 /* GL_ARB_framebuffer_object */
 118 static PFNGLISRENDERBUFFERPROC glIsRenderbuffer_func = NULL;
 119 static PFNGLBINDRENDERBUFFERPROC glBindRenderbuffer_func = NULL;
 120 static PFNGLDELETERENDERBUFFERSPROC glDeleteRenderbuffers_func = NULL;
 121 static PFNGLGENRENDERBUFFERSPROC glGenRenderbuffers_func = NULL;
 122 static PFNGLRENDERBUFFERSTORAGEPROC glRenderbufferStorage_func = NULL;
 123 static PFNGLGETRENDERBUFFERPARAMETERIVPROC glGetRenderbufferParameteriv_func = NULL;
 124 static PFNGLISFRAMEBUFFERPROC glIsFramebuffer_func = NULL;
 125 static PFNGLBINDFRAMEBUFFERPROC glBindFramebuffer_func = NULL;
 126 static PFNGLDELETEFRAMEBUFFERSPROC glDeleteFramebuffers_func = NULL;
 127 static PFNGLGENFRAMEBUFFERSPROC glGenFramebuffers_func = NULL;
 128 static PFNGLCHECKFRAMEBUFFERSTATUSPROC glCheckFramebufferStatus_func = NULL;
 129 static PFNGLFRAMEBUFFERTEXTURE1DPROC glFramebufferTexture1D_func = NULL;
 130 static PFNGLFRAMEBUFFERTEXTURE2DPROC glFramebufferTexture2D_func = NULL;
 131 static PFNGLFRAMEBUFFERTEXTURE3DPROC glFramebufferTexture3D_func = NULL;
 132 static PFNGLFRAMEBUFFERRENDERBUFFERPROC glFramebufferRenderbuffer_func = NULL;
 133 static PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC glGetFramebufferAttachmentParameteriv_func = NULL;
 134 static PFNGLGENERATEMIPMAPPROC glGenerateMipmap_func = NULL;
 135 static PFNGLBLITFRAMEBUFFERPROC glBlitFramebuffer_func = NULL;
 136 static PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC glRenderbufferStorageMultisample_func = NULL;
 137 static PFNGLFRAMEBUFFERTEXTURELAYERPROC glFramebufferTextureLayer_func = NULL;
 138
 139
 140 static void
 141 GetExtensionFuncs(void)
 142 {
 143    /* OpenGL 2.0 */
 144    glAttachShader_func = (PFNGLATTACHSHADERPROC) glutGetProcAddress("glAttachShader");
 145    glBindAttribLocation_func = (PFNGLBINDATTRIBLOCATIONPROC) glutGetProcAddress("glBindAttribLocation");
 146    glCompileShader_func = (PFNGLCOMPILESHADERPROC) glutGetProcAddress("glCompileShader");
 147    glCreateProgram_func = (PFNGLCREATEPROGRAMPROC) glutGetProcAddress("glCreateProgram");
 148    glCreateShader_func = (PFNGLCREATESHADERPROC) glutGetProcAddress("glCreateShader");
 149    glDeleteProgram_func = (PFNGLDELETEPROGRAMPROC) glutGetProcAddress("glDeleteProgram");
 150    glDeleteShader_func = (PFNGLDELETESHADERPROC) glutGetProcAddress("glDeleteShader");
 151    glGetActiveAttrib_func = (PFNGLGETACTIVEATTRIBPROC) glutGetProcAddress("glGetActiveAttrib");
 152    glGetActiveUniform_func = (PFNGLGETACTIVEUNIFORMPROC) glutGetProcAddress("glGetActiveUniform");
 153    glGetAttachedShaders_func = (PFNGLGETATTACHEDSHADERSPROC) glutGetProcAddress("glGetAttachedShaders");
 154    glGetAttribLocation_func = (PFNGLGETATTRIBLOCATIONPROC) glutGetProcAddress("glGetAttribLocation");
 155    glGetProgramInfoLog_func = (PFNGLGETPROGRAMINFOLOGPROC) glutGetProcAddress("glGetProgramInfoLog");
 156    glGetShaderInfoLog_func = (PFNGLGETSHADERINFOLOGPROC) glutGetProcAddress("glGetShaderInfoLog");
 157    glGetProgramiv_func = (PFNGLGETPROGRAMIVPROC) glutGetProcAddress("glGetProgramiv");
 158    glGetShaderiv_func = (PFNGLGETSHADERIVPROC) glutGetProcAddress("glGetShaderiv");
 159    glGetShaderSource_func = (PFNGLGETSHADERSOURCEPROC) glutGetProcAddress("glGetShaderSource");
 160    glGetUniformLocation_func = (PFNGLGETUNIFORMLOCATIONPROC) glutGetProcAddress("glGetUniformLocation");
 161    glGetUniformfv_func = (PFNGLGETUNIFORMFVPROC) glutGetProcAddress("glGetUniformfv");
 162    glIsProgram_func = (PFNGLISPROGRAMPROC) glutGetProcAddress("glIsProgram");
 163    glIsShader_func = (PFNGLISSHADERPROC) glutGetProcAddress("glIsShader");
 164    glLinkProgram_func = (PFNGLLINKPROGRAMPROC) glutGetProcAddress("glLinkProgram");
 165    glShaderSource_func = (PFNGLSHADERSOURCEPROC) glutGetProcAddress("glShaderSource");
 166    glUniform1i_func = (PFNGLUNIFORM1IPROC) glutGetProcAddress("glUniform1i");
 167    glUniform2i_func = (PFNGLUNIFORM2IPROC) glutGetProcAddress("glUniform2i");
 168    glUniform3i_func = (PFNGLUNIFORM3IPROC) glutGetProcAddress("glUniform3i");
 169    glUniform4i_func = (PFNGLUNIFORM4IPROC) glutGetProcAddress("glUniform3i");
 170    glUniform1f_func = (PFNGLUNIFORM1FPROC) glutGetProcAddress("glUniform1f");
 171    glUniform2f_func = (PFNGLUNIFORM2FPROC) glutGetProcAddress("glUniform2f");
 172    glUniform3f_func = (PFNGLUNIFORM3FPROC) glutGetProcAddress("glUniform3f");
 173    glUniform4f_func = (PFNGLUNIFORM4FPROC) glutGetProcAddress("glUniform4f");
 174    glUniform1fv_func = (PFNGLUNIFORM1FVPROC) glutGetProcAddress("glUniform1fv");
 175    glUniform2fv_func = (PFNGLUNIFORM2FVPROC) glutGetProcAddress("glUniform2fv");
 176    glUniform3fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform3fv");
 177    glUniform4fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform4fv");
 178    glUniformMatrix2fv_func = (PFNGLUNIFORMMATRIX2FVPROC) glutGetProcAddress("glUniformMatrix2fv");
 179    glUniformMatrix3fv_func = (PFNGLUNIFORMMATRIX3FVPROC) glutGetProcAddress("glUniformMatrix3fv");
 180    glUniformMatrix4fv_func = (PFNGLUNIFORMMATRIX4FVPROC) glutGetProcAddress("glUniformMatrix4fv");
 181    glUseProgram_func = (PFNGLUSEPROGRAMPROC) glutGetProcAddress("glUseProgram");
 182    glVertexAttrib1f_func = (PFNGLVERTEXATTRIB1FPROC) glutGetProcAddress("glVertexAttrib1f");
 183    glVertexAttrib2f_func = (PFNGLVERTEXATTRIB2FPROC) glutGetProcAddress("glVertexAttrib2f");
 184    glVertexAttrib3f_func = (PFNGLVERTEXATTRIB3FPROC) glutGetProcAddress("glVertexAttrib3f");
 185    glVertexAttrib4f_func = (PFNGLVERTEXATTRIB4FPROC) glutGetProcAddress("glVertexAttrib4f");
 186    glVertexAttrib1fv_func = (PFNGLVERTEXATTRIB1FVPROC) glutGetProcAddress("glVertexAttrib1fv");
 187    glVertexAttrib2fv_func = (PFNGLVERTEXATTRIB2FVPROC) glutGetProcAddress("glVertexAttrib2fv");
 188    glVertexAttrib3fv_func = (PFNGLVERTEXATTRIB3FVPROC) glutGetProcAddress("glVertexAttrib3fv");
 189    glVertexAttrib4fv_func = (PFNGLVERTEXATTRIB4FVPROC) glutGetProcAddress("glVertexAttrib4fv");
 190
 191    glVertexAttribPointer_func = (PFNGLVERTEXATTRIBPOINTERPROC) glutGetProcAddress("glVertexAttribPointer");
 192    glEnableVertexAttribArray_func = (PFNGLENABLEVERTEXATTRIBARRAYPROC) glutGetProcAddress("glEnableVertexAttribArray");
 193    glDisableVertexAttribArray_func = (PFNGLDISABLEVERTEXATTRIBARRAYPROC) glutGetProcAddress("glDisableVertexAttribArray");
 194
 195    /* OpenGL 2.1 */
 196    glUniformMatrix2x3fv_func = (PFNGLUNIFORMMATRIX2X3FVPROC) glutGetProcAddress("glUniformMatrix2x3fv");
 197    glUniformMatrix3x2fv_func = (PFNGLUNIFORMMATRIX3X2FVPROC) glutGetProcAddress("glUniformMatrix3x2fv");
 198    glUniformMatrix2x4fv_func = (PFNGLUNIFORMMATRIX2X4FVPROC) glutGetProcAddress("glUniformMatrix2x4fv");
 199    glUniformMatrix4x2fv_func = (PFNGLUNIFORMMATRIX4X2FVPROC) glutGetProcAddress("glUniformMatrix4x2fv");
 200    glUniformMatrix3x4fv_func = (PFNGLUNIFORMMATRIX3X4FVPROC) glutGetProcAddress("glUniformMatrix3x4fv");
 201    glUniformMatrix4x3fv_func = (PFNGLUNIFORMMATRIX4X3FVPROC) glutGetProcAddress("glUniformMatrix4x3fv");
 202
 203    /* OpenGL 1.4 */
 204    glPointParameterfv_func = (PFNGLPOINTPARAMETERFVPROC) glutGetProcAddress("glPointParameterfv");
 205    glSecondaryColor3fv_func = (PFNGLSECONDARYCOLOR3FVPROC) glutGetProcAddress("glSecondaryColor3fv");
 206
 207    /* GL_ARB_vertex/fragment_program */
 208    glBindProgramARB_func = (PFNGLBINDPROGRAMARBPROC) glutGetProcAddress("glBindProgramARB");
 209    glDeleteProgramsARB_func = (PFNGLDELETEPROGRAMSARBPROC) glutGetProcAddress("glDeleteProgramsARB");
 210    glGenProgramsARB_func = (PFNGLGENPROGRAMSARBPROC) glutGetProcAddress("glGenProgramsARB");
 211    glGetProgramLocalParameterdvARB_func = (PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC) glutGetProcAddress("glGetProgramLocalParameterdvARB");
 212    glIsProgramARB_func = (PFNGLISPROGRAMARBPROC) glutGetProcAddress("glIsProgramARB");
 213    glProgramLocalParameter4dARB_func = (PFNGLPROGRAMLOCALPARAMETER4DARBPROC) glutGetProcAddress("glProgramLocalParameter4dARB");
 214    glProgramLocalParameter4fvARB_func = (PFNGLPROGRAMLOCALPARAMETER4FVARBPROC) glutGetProcAddress("glProgramLocalParameter4fvARB");
 215    glProgramStringARB_func = (PFNGLPROGRAMSTRINGARBPROC) glutGetProcAddress("glProgramStringARB");
 216    glVertexAttrib1fARB_func = (PFNGLVERTEXATTRIB1FARBPROC) glutGetProcAddress("glVertexAttrib1fARB");
 217
 218    /* GL_APPLE_vertex_array_object */
 219    glBindVertexArrayAPPLE_func = (PFNGLBINDVERTEXARRAYAPPLEPROC) glutGetProcAddress("glBindVertexArrayAPPLE");
 220    glDeleteVertexArraysAPPLE_func = (PFNGLDELETEVERTEXARRAYSAPPLEPROC) glutGetProcAddress("glDeleteVertexArraysAPPLE");
 221    glGenVertexArraysAPPLE_func = (PFNGLGENVERTEXARRAYSAPPLEPROC) glutGetProcAddress("glGenVertexArraysAPPLE");
 222    glIsVertexArrayAPPLE_func = (PFNGLISVERTEXARRAYAPPLEPROC) glutGetProcAddress("glIsVertexArrayAPPLE");
 223
 224    /* GL_EXT_stencil_two_side */
 225    glActiveStencilFaceEXT_func = (PFNGLACTIVESTENCILFACEEXTPROC) glutGetProcAddress("glActiveStencilFaceEXT");
 226
 227    /* GL_ARB_vertex_buffer_object */
 228    glGenBuffersARB_func = (PFNGLGENBUFFERSARBPROC) glutGetProcAddress("glGenBuffersARB");
 229    glDeleteBuffersARB_func = (PFNGLDELETEBUFFERSARBPROC) glutGetProcAddress("glDeleteBuffersARB");
 230    glBindBufferARB_func = (PFNGLBINDBUFFERARBPROC) glutGetProcAddress("glBindBufferARB");
 231    glBufferDataARB_func = (PFNGLBUFFERDATAARBPROC) glutGetProcAddress("glBufferDataARB");
 232    glBufferSubDataARB_func = (PFNGLBUFFERSUBDATAARBPROC) glutGetProcAddress("glBufferSubDataARB");
 233    glMapBufferARB_func = (PFNGLMAPBUFFERARBPROC) glutGetProcAddress("glMapBufferARB");
 234    glUnmapBufferARB_func = (PFNGLUNMAPBUFFERARBPROC) glutGetProcAddress("glUnmapBufferARB");
 235
 236    /* GL_EXT_framebuffer_object */
 237    glIsRenderbufferEXT_func = (PFNGLISRENDERBUFFEREXTPROC) glutGetProcAddress("glIsRenderbufferEXT");
 238    glBindRenderbufferEXT_func = (PFNGLBINDRENDERBUFFEREXTPROC) glutGetProcAddress("glBindRenderbufferEXT");
 239    glDeleteRenderbuffersEXT_func = (PFNGLDELETERENDERBUFFERSEXTPROC) glutGetProcAddress("glDeleteRenderbuffersEXT");
 240    glGenRenderbuffersEXT_func = (PFNGLGENRENDERBUFFERSEXTPROC) glutGetProcAddress("glGenRenderbuffersEXT");
 241    glRenderbufferStorageEXT_func = (PFNGLRENDERBUFFERSTORAGEEXTPROC) glutGetProcAddress("glRenderbufferStorageEXT");
 242    glGetRenderbufferParameterivEXT_func = (PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC) glutGetProcAddress("glGetRenderbufferParameterivEXT");
 243    glIsFramebufferEXT_func = (PFNGLISFRAMEBUFFEREXTPROC) glutGetProcAddress("glIsFramebufferEXT");
 244    glBindFramebufferEXT_func = (PFNGLBINDFRAMEBUFFEREXTPROC) glutGetProcAddress("glBindFramebufferEXT");
 245    glDeleteFramebuffersEXT_func = (PFNGLDELETEFRAMEBUFFERSEXTPROC) glutGetProcAddress("glDeleteFramebuffersEXT");
 246    glGenFramebuffersEXT_func = (PFNGLGENFRAMEBUFFERSEXTPROC) glutGetProcAddress("glGenFramebuffersEXT");
 247    glCheckFramebufferStatusEXT_func = (PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC) glutGetProcAddress("glCheckFramebufferStatusEXT");
 248    glFramebufferTexture1DEXT_func = (PFNGLFRAMEBUFFERTEXTURE1DEXTPROC) glutGetProcAddress("glFramebufferTexture1DEXT");
 249    glFramebufferTexture2DEXT_func = (PFNGLFRAMEBUFFERTEXTURE2DEXTPROC) glutGetProcAddress("glFramebufferTexture2DEXT");
 250    glFramebufferTexture3DEXT_func = (PFNGLFRAMEBUFFERTEXTURE3DEXTPROC) glutGetProcAddress("glFramebufferTexture3DEXT");
 251    glFramebufferRenderbufferEXT_func = (PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC) glutGetProcAddress("glFramebufferRenderbufferEXT");
 252    glGetFramebufferAttachmentParameterivEXT_func = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC) glutGetProcAddress("glGetFramebufferAttachmentParameterivEXT");
 253    glGenerateMipmapEXT_func = (PFNGLGENERATEMIPMAPEXTPROC) glutGetProcAddress("glGenerateMipmapEXT");
 254
 255    /* GL_ARB_framebuffer_object */
 256    glIsRenderbuffer_func = (PFNGLISRENDERBUFFERPROC) glutGetProcAddress("glIsRenderbuffer");
 257    glBindRenderbuffer_func = (PFNGLBINDRENDERBUFFERPROC) glutGetProcAddress("glBindRenderbuffer");
 258    glDeleteRenderbuffers_func = (PFNGLDELETERENDERBUFFERSPROC) glutGetProcAddress("glDeleteRenderbuffers");
 259    glGenRenderbuffers_func = (PFNGLGENRENDERBUFFERSPROC) glutGetProcAddress("glGenRenderbuffers");
 260    glRenderbufferStorage_func = (PFNGLRENDERBUFFERSTORAGEPROC) glutGetProcAddress("glRenderbufferStorage");
 261    glGetRenderbufferParameteriv_func = (PFNGLGETRENDERBUFFERPARAMETERIVPROC) glutGetProcAddress("glGetRenderbufferParameteriv");
 262    glIsFramebuffer_func = (PFNGLISFRAMEBUFFERPROC) glutGetProcAddress("glIsFramebuffer");
 263    glBindFramebuffer_func = (PFNGLBINDFRAMEBUFFERPROC) glutGetProcAddress("glBindFramebuffer");
 264    glDeleteFramebuffers_func = (PFNGLDELETEFRAMEBUFFERSPROC) glutGetProcAddress("glDeleteFramebuffers");
 265    glGenFramebuffers_func = (PFNGLGENFRAMEBUFFERSPROC) glutGetProcAddress("glGenFramebuffers");
 266    glCheckFramebufferStatus_func = (PFNGLCHECKFRAMEBUFFERSTATUSPROC) glutGetProcAddress("glCheckFramebufferStatus");
 267    glFramebufferTexture1D_func = (PFNGLFRAMEBUFFERTEXTURE1DPROC) glutGetProcAddress("glFramebufferTexture1D");
 268    glFramebufferTexture2D_func = (PFNGLFRAMEBUFFERTEXTURE2DPROC) glutGetProcAddress("glFramebufferTexture2D");
 269    glFramebufferTexture3D_func = (PFNGLFRAMEBUFFERTEXTURE3DPROC) glutGetProcAddress("glFramebufferTexture3D");
 270    glFramebufferRenderbuffer_func = (PFNGLFRAMEBUFFERRENDERBUFFERPROC) glutGetProcAddress("glFramebufferRenderbuffer");
 271    glGetFramebufferAttachmentParameteriv_func = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC) glutGetProcAddress("glGetFramebufferAttachmentParameteriv");
 272    glGenerateMipmap_func = (PFNGLGENERATEMIPMAPPROC) glutGetProcAddress("glGenerateMipmap");
 273    glBlitFramebuffer_func = (PFNGLBLITFRAMEBUFFERPROC) glutGetProcAddress("glBlitFramebuffer");
 274    glRenderbufferStorageMultisample_func = (PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC) glutGetProcAddress("glRenderbufferStorageMultisample");
 275    glFramebufferTextureLayer_func = (PFNGLFRAMEBUFFERTEXTURELAYERPROC) glutGetProcAddress("glFramebufferTextureLayer");
 276 }
 277