progs/util/extfuncs.h - third_party/mesa - Git at Google

 /**
  * Utility for getting OpenGL extension function pointers
  * Meant to be #included.
  */

 /* OpenGL 2.0 */
 static PFNGLATTACHSHADERPROC glAttachShader_func = NULL;
 static PFNGLBINDATTRIBLOCATIONPROC glBindAttribLocation_func = NULL;
 static PFNGLCOMPILESHADERPROC glCompileShader_func = NULL;
 static PFNGLCREATEPROGRAMPROC glCreateProgram_func = NULL;
 static PFNGLCREATESHADERPROC glCreateShader_func = NULL;
 static PFNGLDELETEPROGRAMPROC glDeleteProgram_func = NULL;
 static PFNGLDELETESHADERPROC glDeleteShader_func = NULL;
 static PFNGLGETACTIVEATTRIBPROC glGetActiveAttrib_func = NULL;
 static PFNGLGETACTIVEUNIFORMPROC glGetActiveUniform_func = NULL;
 static PFNGLGETATTACHEDSHADERSPROC glGetAttachedShaders_func = NULL;
 static PFNGLGETATTRIBLOCATIONPROC glGetAttribLocation_func = NULL;
 static PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog_func = NULL;
 static PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog_func = NULL;
 static PFNGLGETSHADERIVPROC glGetShaderiv_func = NULL;
 static PFNGLGETPROGRAMIVPROC glGetProgramiv_func = NULL;
 static PFNGLGETSHADERSOURCEPROC glGetShaderSource_func = NULL;
 static PFNGLGETUNIFORMFVPROC glGetUniformfv_func = NULL;
 static PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation_func = NULL;
 static PFNGLISPROGRAMPROC glIsProgram_func = NULL;
 static PFNGLISSHADERPROC glIsShader_func = NULL;
 static PFNGLLINKPROGRAMPROC glLinkProgram_func = NULL;
 static PFNGLSHADERSOURCEPROC glShaderSource_func = NULL;
 static PFNGLUNIFORM1IPROC glUniform1i_func = NULL;
 static PFNGLUNIFORM2IPROC glUniform2i_func = NULL;
 static PFNGLUNIFORM3IPROC glUniform3i_func = NULL;
 static PFNGLUNIFORM4IPROC glUniform4i_func = NULL;
 static PFNGLUNIFORM1FPROC glUniform1f_func = NULL;
 static PFNGLUNIFORM2FPROC glUniform2f_func = NULL;
 static PFNGLUNIFORM3FPROC glUniform3f_func = NULL;
 static PFNGLUNIFORM4FPROC glUniform4f_func = NULL;
 static PFNGLUNIFORM1FVPROC glUniform1fv_func = NULL;
 static PFNGLUNIFORM2FVPROC glUniform2fv_func = NULL;
 static PFNGLUNIFORM3FVPROC glUniform3fv_func = NULL;
 static PFNGLUNIFORM4FVPROC glUniform4fv_func = NULL;
 static PFNGLUNIFORMMATRIX2FVPROC glUniformMatrix2fv_func = NULL;
 static PFNGLUNIFORMMATRIX3FVPROC glUniformMatrix3fv_func = NULL;
 static PFNGLUNIFORMMATRIX4FVPROC glUniformMatrix4fv_func = NULL;
 static PFNGLUSEPROGRAMPROC glUseProgram_func = NULL;
 static PFNGLVERTEXATTRIB1FPROC glVertexAttrib1f_func = NULL;
 static PFNGLVERTEXATTRIB2FPROC glVertexAttrib2f_func = NULL;
 static PFNGLVERTEXATTRIB3FPROC glVertexAttrib3f_func = NULL;
 static PFNGLVERTEXATTRIB4FPROC glVertexAttrib4f_func = NULL;
 static PFNGLVERTEXATTRIB1FVPROC glVertexAttrib1fv_func = NULL;
 static PFNGLVERTEXATTRIB2FVPROC glVertexAttrib2fv_func = NULL;
 static PFNGLVERTEXATTRIB3FVPROC glVertexAttrib3fv_func = NULL;
 static PFNGLVERTEXATTRIB4FVPROC glVertexAttrib4fv_func = NULL;
 static PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer_func = NULL;
 static PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray_func = NULL;
 static PFNGLDISABLEVERTEXATTRIBARRAYPROC glDisableVertexAttribArray_func = NULL;

 /* OpenGL 2.1 */
 static PFNGLUNIFORMMATRIX2X3FVPROC glUniformMatrix2x3fv_func = NULL;
 static PFNGLUNIFORMMATRIX3X2FVPROC glUniformMatrix3x2fv_func = NULL;
 static PFNGLUNIFORMMATRIX2X4FVPROC glUniformMatrix2x4fv_func = NULL;
 static PFNGLUNIFORMMATRIX4X2FVPROC glUniformMatrix4x2fv_func = NULL;
 static PFNGLUNIFORMMATRIX3X4FVPROC glUniformMatrix3x4fv_func = NULL;
 static PFNGLUNIFORMMATRIX4X3FVPROC glUniformMatrix4x3fv_func = NULL;

 /* OpenGL 1.4 */
 static PFNGLPOINTPARAMETERFVPROC glPointParameterfv_func = NULL;
 static PFNGLSECONDARYCOLOR3FVPROC glSecondaryColor3fv_func = NULL;

 /* GL_ARB_vertex/fragment_program */
 static PFNGLBINDPROGRAMARBPROC glBindProgramARB_func = NULL;
 static PFNGLDELETEPROGRAMSARBPROC glDeleteProgramsARB_func = NULL;
 static PFNGLGENPROGRAMSARBPROC glGenProgramsARB_func = NULL;
 static PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC glGetProgramLocalParameterdvARB_func = NULL;
 static PFNGLISPROGRAMARBPROC glIsProgramARB_func = NULL;
 static PFNGLPROGRAMLOCALPARAMETER4DARBPROC glProgramLocalParameter4dARB_func = NULL;
 static PFNGLPROGRAMLOCALPARAMETER4FVARBPROC glProgramLocalParameter4fvARB_func = NULL;
 static PFNGLPROGRAMSTRINGARBPROC glProgramStringARB_func = NULL;
 static PFNGLVERTEXATTRIB1FARBPROC glVertexAttrib1fARB_func = NULL;

 /* GL_APPLE_vertex_array_object */
 static PFNGLBINDVERTEXARRAYAPPLEPROC glBindVertexArrayAPPLE_func = NULL;
 static PFNGLDELETEVERTEXARRAYSAPPLEPROC glDeleteVertexArraysAPPLE_func = NULL;
 static PFNGLGENVERTEXARRAYSAPPLEPROC glGenVertexArraysAPPLE_func = NULL;
 static PFNGLISVERTEXARRAYAPPLEPROC glIsVertexArrayAPPLE_func = NULL;

 /* GL_EXT_stencil_two_side */
 static PFNGLACTIVESTENCILFACEEXTPROC glActiveStencilFaceEXT_func = NULL;

 /* GL_ARB_buffer_object */
 static PFNGLGENBUFFERSARBPROC glGenBuffersARB_func = NULL;
 static PFNGLDELETEBUFFERSARBPROC glDeleteBuffersARB_func = NULL;
 static PFNGLBINDBUFFERARBPROC glBindBufferARB_func = NULL;
 static PFNGLBUFFERDATAARBPROC glBufferDataARB_func = NULL;
 static PFNGLBUFFERSUBDATAARBPROC glBufferSubDataARB_func = NULL;
 static PFNGLMAPBUFFERARBPROC glMapBufferARB_func = NULL;
 static PFNGLUNMAPBUFFERARBPROC glUnmapBufferARB_func = NULL;

 /* GL_EXT_framebuffer_object */
 static PFNGLISRENDERBUFFEREXTPROC glIsRenderbufferEXT_func = NULL;
 static PFNGLBINDRENDERBUFFEREXTPROC glBindRenderbufferEXT_func = NULL;
 static PFNGLDELETERENDERBUFFERSEXTPROC glDeleteRenderbuffersEXT_func = NULL;
 static PFNGLGENRENDERBUFFERSEXTPROC glGenRenderbuffersEXT_func = NULL;
 static PFNGLRENDERBUFFERSTORAGEEXTPROC glRenderbufferStorageEXT_func = NULL;
 static PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC glGetRenderbufferParameterivEXT_func = NULL;
 static PFNGLISFRAMEBUFFEREXTPROC glIsFramebufferEXT_func = NULL;
 static PFNGLBINDFRAMEBUFFEREXTPROC glBindFramebufferEXT_func = NULL;
 static PFNGLDELETEFRAMEBUFFERSEXTPROC glDeleteFramebuffersEXT_func = NULL;
 static PFNGLGENFRAMEBUFFERSEXTPROC glGenFramebuffersEXT_func = NULL;
 static PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC glCheckFramebufferStatusEXT_func = NULL;
 static PFNGLFRAMEBUFFERTEXTURE1DEXTPROC glFramebufferTexture1DEXT_func = NULL;
 static PFNGLFRAMEBUFFERTEXTURE2DEXTPROC glFramebufferTexture2DEXT_func = NULL;
 static PFNGLFRAMEBUFFERTEXTURE3DEXTPROC glFramebufferTexture3DEXT_func = NULL;
 static PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC glFramebufferRenderbufferEXT_func = NULL;
 static PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC glGetFramebufferAttachmentParameterivEXT_func = NULL;
 static PFNGLGENERATEMIPMAPEXTPROC glGenerateMipmapEXT_func = NULL;

 /* GL_ARB_framebuffer_object */
 static PFNGLISRENDERBUFFERPROC glIsRenderbuffer_func = NULL;
 static PFNGLBINDRENDERBUFFERPROC glBindRenderbuffer_func = NULL;
 static PFNGLDELETERENDERBUFFERSPROC glDeleteRenderbuffers_func = NULL;
 static PFNGLGENRENDERBUFFERSPROC glGenRenderbuffers_func = NULL;
 static PFNGLRENDERBUFFERSTORAGEPROC glRenderbufferStorage_func = NULL;
 static PFNGLGETRENDERBUFFERPARAMETERIVPROC glGetRenderbufferParameteriv_func = NULL;
 static PFNGLISFRAMEBUFFERPROC glIsFramebuffer_func = NULL;
 static PFNGLBINDFRAMEBUFFERPROC glBindFramebuffer_func = NULL;
 static PFNGLDELETEFRAMEBUFFERSPROC glDeleteFramebuffers_func = NULL;
 static PFNGLGENFRAMEBUFFERSPROC glGenFramebuffers_func = NULL;
 static PFNGLCHECKFRAMEBUFFERSTATUSPROC glCheckFramebufferStatus_func = NULL;
 static PFNGLFRAMEBUFFERTEXTURE1DPROC glFramebufferTexture1D_func = NULL;
 static PFNGLFRAMEBUFFERTEXTURE2DPROC glFramebufferTexture2D_func = NULL;
 static PFNGLFRAMEBUFFERTEXTURE3DPROC glFramebufferTexture3D_func = NULL;
 static PFNGLFRAMEBUFFERRENDERBUFFERPROC glFramebufferRenderbuffer_func = NULL;
 static PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC glGetFramebufferAttachmentParameteriv_func = NULL;
 static PFNGLGENERATEMIPMAPPROC glGenerateMipmap_func = NULL;
 static PFNGLBLITFRAMEBUFFERPROC glBlitFramebuffer_func = NULL;
 static PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC glRenderbufferStorageMultisample_func = NULL;
 static PFNGLFRAMEBUFFERTEXTURELAYERPROC glFramebufferTextureLayer_func = NULL;


 static void
 GetExtensionFuncs(void)
 {
    /* OpenGL 2.0 */
    glAttachShader_func = (PFNGLATTACHSHADERPROC) glutGetProcAddress("glAttachShader");
    glBindAttribLocation_func = (PFNGLBINDATTRIBLOCATIONPROC) glutGetProcAddress("glBindAttribLocation");
    glCompileShader_func = (PFNGLCOMPILESHADERPROC) glutGetProcAddress("glCompileShader");
    glCreateProgram_func = (PFNGLCREATEPROGRAMPROC) glutGetProcAddress("glCreateProgram");
    glCreateShader_func = (PFNGLCREATESHADERPROC) glutGetProcAddress("glCreateShader");
    glDeleteProgram_func = (PFNGLDELETEPROGRAMPROC) glutGetProcAddress("glDeleteProgram");
    glDeleteShader_func = (PFNGLDELETESHADERPROC) glutGetProcAddress("glDeleteShader");
    glGetActiveAttrib_func = (PFNGLGETACTIVEATTRIBPROC) glutGetProcAddress("glGetActiveAttrib");
    glGetActiveUniform_func = (PFNGLGETACTIVEUNIFORMPROC) glutGetProcAddress("glGetActiveUniform");
    glGetAttachedShaders_func = (PFNGLGETATTACHEDSHADERSPROC) glutGetProcAddress("glGetAttachedShaders");
    glGetAttribLocation_func = (PFNGLGETATTRIBLOCATIONPROC) glutGetProcAddress("glGetAttribLocation");
    glGetProgramInfoLog_func = (PFNGLGETPROGRAMINFOLOGPROC) glutGetProcAddress("glGetProgramInfoLog");
    glGetShaderInfoLog_func = (PFNGLGETSHADERINFOLOGPROC) glutGetProcAddress("glGetShaderInfoLog");
    glGetProgramiv_func = (PFNGLGETPROGRAMIVPROC) glutGetProcAddress("glGetProgramiv");
    glGetShaderiv_func = (PFNGLGETSHADERIVPROC) glutGetProcAddress("glGetShaderiv");
    glGetShaderSource_func = (PFNGLGETSHADERSOURCEPROC) glutGetProcAddress("glGetShaderSource");
    glGetUniformLocation_func = (PFNGLGETUNIFORMLOCATIONPROC) glutGetProcAddress("glGetUniformLocation");
    glGetUniformfv_func = (PFNGLGETUNIFORMFVPROC) glutGetProcAddress("glGetUniformfv");
    glIsProgram_func = (PFNGLISPROGRAMPROC) glutGetProcAddress("glIsProgram");
    glIsShader_func = (PFNGLISSHADERPROC) glutGetProcAddress("glIsShader");
    glLinkProgram_func = (PFNGLLINKPROGRAMPROC) glutGetProcAddress("glLinkProgram");
    glShaderSource_func = (PFNGLSHADERSOURCEPROC) glutGetProcAddress("glShaderSource");
    glUniform1i_func = (PFNGLUNIFORM1IPROC) glutGetProcAddress("glUniform1i");
    glUniform2i_func = (PFNGLUNIFORM2IPROC) glutGetProcAddress("glUniform2i");
    glUniform3i_func = (PFNGLUNIFORM3IPROC) glutGetProcAddress("glUniform3i");
    glUniform4i_func = (PFNGLUNIFORM4IPROC) glutGetProcAddress("glUniform3i");
    glUniform1f_func = (PFNGLUNIFORM1FPROC) glutGetProcAddress("glUniform1f");
    glUniform2f_func = (PFNGLUNIFORM2FPROC) glutGetProcAddress("glUniform2f");
    glUniform3f_func = (PFNGLUNIFORM3FPROC) glutGetProcAddress("glUniform3f");
    glUniform4f_func = (PFNGLUNIFORM4FPROC) glutGetProcAddress("glUniform4f");
    glUniform1fv_func = (PFNGLUNIFORM1FVPROC) glutGetProcAddress("glUniform1fv");
    glUniform2fv_func = (PFNGLUNIFORM2FVPROC) glutGetProcAddress("glUniform2fv");
    glUniform3fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform3fv");
    glUniform4fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform4fv");
    glUniformMatrix2fv_func = (PFNGLUNIFORMMATRIX2FVPROC) glutGetProcAddress("glUniformMatrix2fv");
    glUniformMatrix3fv_func = (PFNGLUNIFORMMATRIX3FVPROC) glutGetProcAddress("glUniformMatrix3fv");
    glUniformMatrix4fv_func = (PFNGLUNIFORMMATRIX4FVPROC) glutGetProcAddress("glUniformMatrix4fv");
    glUseProgram_func = (PFNGLUSEPROGRAMPROC) glutGetProcAddress("glUseProgram");
    glVertexAttrib1f_func = (PFNGLVERTEXATTRIB1FPROC) glutGetProcAddress("glVertexAttrib1f");
    glVertexAttrib2f_func = (PFNGLVERTEXATTRIB2FPROC) glutGetProcAddress("glVertexAttrib2f");
    glVertexAttrib3f_func = (PFNGLVERTEXATTRIB3FPROC) glutGetProcAddress("glVertexAttrib3f");
    glVertexAttrib4f_func = (PFNGLVERTEXATTRIB4FPROC) glutGetProcAddress("glVertexAttrib4f");
    glVertexAttrib1fv_func = (PFNGLVERTEXATTRIB1FVPROC) glutGetProcAddress("glVertexAttrib1fv");
    glVertexAttrib2fv_func = (PFNGLVERTEXATTRIB2FVPROC) glutGetProcAddress("glVertexAttrib2fv");
    glVertexAttrib3fv_func = (PFNGLVERTEXATTRIB3FVPROC) glutGetProcAddress("glVertexAttrib3fv");
    glVertexAttrib4fv_func = (PFNGLVERTEXATTRIB4FVPROC) glutGetProcAddress("glVertexAttrib4fv");

    glVertexAttribPointer_func = (PFNGLVERTEXATTRIBPOINTERPROC) glutGetProcAddress("glVertexAttribPointer");
    glEnableVertexAttribArray_func = (PFNGLENABLEVERTEXATTRIBARRAYPROC) glutGetProcAddress("glEnableVertexAttribArray");
    glDisableVertexAttribArray_func = (PFNGLDISABLEVERTEXATTRIBARRAYPROC) glutGetProcAddress("glDisableVertexAttribArray");

    /* OpenGL 2.1 */
    glUniformMatrix2x3fv_func = (PFNGLUNIFORMMATRIX2X3FVPROC) glutGetProcAddress("glUniformMatrix2x3fv");
    glUniformMatrix3x2fv_func = (PFNGLUNIFORMMATRIX3X2FVPROC) glutGetProcAddress("glUniformMatrix3x2fv");
    glUniformMatrix2x4fv_func = (PFNGLUNIFORMMATRIX2X4FVPROC) glutGetProcAddress("glUniformMatrix2x4fv");
    glUniformMatrix4x2fv_func = (PFNGLUNIFORMMATRIX4X2FVPROC) glutGetProcAddress("glUniformMatrix4x2fv");
    glUniformMatrix3x4fv_func = (PFNGLUNIFORMMATRIX3X4FVPROC) glutGetProcAddress("glUniformMatrix3x4fv");
    glUniformMatrix4x3fv_func = (PFNGLUNIFORMMATRIX4X3FVPROC) glutGetProcAddress("glUniformMatrix4x3fv");

    /* OpenGL 1.4 */
    glPointParameterfv_func = (PFNGLPOINTPARAMETERFVPROC) glutGetProcAddress("glPointParameterfv");
    glSecondaryColor3fv_func = (PFNGLSECONDARYCOLOR3FVPROC) glutGetProcAddress("glSecondaryColor3fv");

    /* GL_ARB_vertex/fragment_program */
    glBindProgramARB_func = (PFNGLBINDPROGRAMARBPROC) glutGetProcAddress("glBindProgramARB");
    glDeleteProgramsARB_func = (PFNGLDELETEPROGRAMSARBPROC) glutGetProcAddress("glDeleteProgramsARB");
    glGenProgramsARB_func = (PFNGLGENPROGRAMSARBPROC) glutGetProcAddress("glGenProgramsARB");
    glGetProgramLocalParameterdvARB_func = (PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC) glutGetProcAddress("glGetProgramLocalParameterdvARB");
    glIsProgramARB_func = (PFNGLISPROGRAMARBPROC) glutGetProcAddress("glIsProgramARB");
    glProgramLocalParameter4dARB_func = (PFNGLPROGRAMLOCALPARAMETER4DARBPROC) glutGetProcAddress("glProgramLocalParameter4dARB");
    glProgramLocalParameter4fvARB_func = (PFNGLPROGRAMLOCALPARAMETER4FVARBPROC) glutGetProcAddress("glProgramLocalParameter4fvARB");
    glProgramStringARB_func = (PFNGLPROGRAMSTRINGARBPROC) glutGetProcAddress("glProgramStringARB");
    glVertexAttrib1fARB_func = (PFNGLVERTEXATTRIB1FARBPROC) glutGetProcAddress("glVertexAttrib1fARB");

    /* GL_APPLE_vertex_array_object */
    glBindVertexArrayAPPLE_func = (PFNGLBINDVERTEXARRAYAPPLEPROC) glutGetProcAddress("glBindVertexArrayAPPLE");
    glDeleteVertexArraysAPPLE_func = (PFNGLDELETEVERTEXARRAYSAPPLEPROC) glutGetProcAddress("glDeleteVertexArraysAPPLE");
    glGenVertexArraysAPPLE_func = (PFNGLGENVERTEXARRAYSAPPLEPROC) glutGetProcAddress("glGenVertexArraysAPPLE");
    glIsVertexArrayAPPLE_func = (PFNGLISVERTEXARRAYAPPLEPROC) glutGetProcAddress("glIsVertexArrayAPPLE");

    /* GL_EXT_stencil_two_side */
    glActiveStencilFaceEXT_func = (PFNGLACTIVESTENCILFACEEXTPROC) glutGetProcAddress("glActiveStencilFaceEXT");

    /* GL_ARB_vertex_buffer_object */
    glGenBuffersARB_func = (PFNGLGENBUFFERSARBPROC) glutGetProcAddress("glGenBuffersARB");
    glDeleteBuffersARB_func = (PFNGLDELETEBUFFERSARBPROC) glutGetProcAddress("glDeleteBuffersARB");
    glBindBufferARB_func = (PFNGLBINDBUFFERARBPROC) glutGetProcAddress("glBindBufferARB");
    glBufferDataARB_func = (PFNGLBUFFERDATAARBPROC) glutGetProcAddress("glBufferDataARB");
    glBufferSubDataARB_func = (PFNGLBUFFERSUBDATAARBPROC) glutGetProcAddress("glBufferSubDataARB");
    glMapBufferARB_func = (PFNGLMAPBUFFERARBPROC) glutGetProcAddress("glMapBufferARB");
    glUnmapBufferARB_func = (PFNGLUNMAPBUFFERARBPROC) glutGetProcAddress("glUnmapBufferARB");

    /* GL_EXT_framebuffer_object */
    glIsRenderbufferEXT_func = (PFNGLISRENDERBUFFEREXTPROC) glutGetProcAddress("glIsRenderbufferEXT");
    glBindRenderbufferEXT_func = (PFNGLBINDRENDERBUFFEREXTPROC) glutGetProcAddress("glBindRenderbufferEXT");
    glDeleteRenderbuffersEXT_func = (PFNGLDELETERENDERBUFFERSEXTPROC) glutGetProcAddress("glDeleteRenderbuffersEXT");
    glGenRenderbuffersEXT_func = (PFNGLGENRENDERBUFFERSEXTPROC) glutGetProcAddress("glGenRenderbuffersEXT");
    glRenderbufferStorageEXT_func = (PFNGLRENDERBUFFERSTORAGEEXTPROC) glutGetProcAddress("glRenderbufferStorageEXT");
    glGetRenderbufferParameterivEXT_func = (PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC) glutGetProcAddress("glGetRenderbufferParameterivEXT");
    glIsFramebufferEXT_func = (PFNGLISFRAMEBUFFEREXTPROC) glutGetProcAddress("glIsFramebufferEXT");
    glBindFramebufferEXT_func = (PFNGLBINDFRAMEBUFFEREXTPROC) glutGetProcAddress("glBindFramebufferEXT");
    glDeleteFramebuffersEXT_func = (PFNGLDELETEFRAMEBUFFERSEXTPROC) glutGetProcAddress("glDeleteFramebuffersEXT");
    glGenFramebuffersEXT_func = (PFNGLGENFRAMEBUFFERSEXTPROC) glutGetProcAddress("glGenFramebuffersEXT");
    glCheckFramebufferStatusEXT_func = (PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC) glutGetProcAddress("glCheckFramebufferStatusEXT");
    glFramebufferTexture1DEXT_func = (PFNGLFRAMEBUFFERTEXTURE1DEXTPROC) glutGetProcAddress("glFramebufferTexture1DEXT");
    glFramebufferTexture2DEXT_func = (PFNGLFRAMEBUFFERTEXTURE2DEXTPROC) glutGetProcAddress("glFramebufferTexture2DEXT");
    glFramebufferTexture3DEXT_func = (PFNGLFRAMEBUFFERTEXTURE3DEXTPROC) glutGetProcAddress("glFramebufferTexture3DEXT");
    glFramebufferRenderbufferEXT_func = (PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC) glutGetProcAddress("glFramebufferRenderbufferEXT");
    glGetFramebufferAttachmentParameterivEXT_func = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC) glutGetProcAddress("glGetFramebufferAttachmentParameterivEXT");
    glGenerateMipmapEXT_func = (PFNGLGENERATEMIPMAPEXTPROC) glutGetProcAddress("glGenerateMipmapEXT");

    /* GL_ARB_framebuffer_object */
    glIsRenderbuffer_func = (PFNGLISRENDERBUFFERPROC) glutGetProcAddress("glIsRenderbuffer");
    glBindRenderbuffer_func = (PFNGLBINDRENDERBUFFERPROC) glutGetProcAddress("glBindRenderbuffer");
    glDeleteRenderbuffers_func = (PFNGLDELETERENDERBUFFERSPROC) glutGetProcAddress("glDeleteRenderbuffers");
    glGenRenderbuffers_func = (PFNGLGENRENDERBUFFERSPROC) glutGetProcAddress("glGenRenderbuffers");
    glRenderbufferStorage_func = (PFNGLRENDERBUFFERSTORAGEPROC) glutGetProcAddress("glRenderbufferStorage");
    glGetRenderbufferParameteriv_func = (PFNGLGETRENDERBUFFERPARAMETERIVPROC) glutGetProcAddress("glGetRenderbufferParameteriv");
    glIsFramebuffer_func = (PFNGLISFRAMEBUFFERPROC) glutGetProcAddress("glIsFramebuffer");
    glBindFramebuffer_func = (PFNGLBINDFRAMEBUFFERPROC) glutGetProcAddress("glBindFramebuffer");
    glDeleteFramebuffers_func = (PFNGLDELETEFRAMEBUFFERSPROC) glutGetProcAddress("glDeleteFramebuffers");
    glGenFramebuffers_func = (PFNGLGENFRAMEBUFFERSPROC) glutGetProcAddress("glGenFramebuffers");
    glCheckFramebufferStatus_func = (PFNGLCHECKFRAMEBUFFERSTATUSPROC) glutGetProcAddress("glCheckFramebufferStatus");
    glFramebufferTexture1D_func = (PFNGLFRAMEBUFFERTEXTURE1DPROC) glutGetProcAddress("glFramebufferTexture1D");
    glFramebufferTexture2D_func = (PFNGLFRAMEBUFFERTEXTURE2DPROC) glutGetProcAddress("glFramebufferTexture2D");
    glFramebufferTexture3D_func = (PFNGLFRAMEBUFFERTEXTURE3DPROC) glutGetProcAddress("glFramebufferTexture3D");
    glFramebufferRenderbuffer_func = (PFNGLFRAMEBUFFERRENDERBUFFERPROC) glutGetProcAddress("glFramebufferRenderbuffer");
    glGetFramebufferAttachmentParameteriv_func = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC) glutGetProcAddress("glGetFramebufferAttachmentParameteriv");
    glGenerateMipmap_func = (PFNGLGENERATEMIPMAPPROC) glutGetProcAddress("glGenerateMipmap");
    glBlitFramebuffer_func = (PFNGLBLITFRAMEBUFFERPROC) glutGetProcAddress("glBlitFramebuffer");
    glRenderbufferStorageMultisample_func = (PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC) glutGetProcAddress("glRenderbufferStorageMultisample");
    glFramebufferTextureLayer_func = (PFNGLFRAMEBUFFERTEXTURELAYERPROC) glutGetProcAddress("glFramebufferTextureLayer");
 }
	/**
	* Utility for getting OpenGL extension function pointers
	* Meant to be #included.
	*/

	/* OpenGL 2.0 */
	static PFNGLATTACHSHADERPROC glAttachShader_func = NULL;
	static PFNGLBINDATTRIBLOCATIONPROC glBindAttribLocation_func = NULL;
	static PFNGLCOMPILESHADERPROC glCompileShader_func = NULL;
	static PFNGLCREATEPROGRAMPROC glCreateProgram_func = NULL;
	static PFNGLCREATESHADERPROC glCreateShader_func = NULL;
	static PFNGLDELETEPROGRAMPROC glDeleteProgram_func = NULL;
	static PFNGLDELETESHADERPROC glDeleteShader_func = NULL;
	static PFNGLGETACTIVEATTRIBPROC glGetActiveAttrib_func = NULL;
	static PFNGLGETACTIVEUNIFORMPROC glGetActiveUniform_func = NULL;
	static PFNGLGETATTACHEDSHADERSPROC glGetAttachedShaders_func = NULL;
	static PFNGLGETATTRIBLOCATIONPROC glGetAttribLocation_func = NULL;
	static PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog_func = NULL;
	static PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog_func = NULL;
	static PFNGLGETSHADERIVPROC glGetShaderiv_func = NULL;
	static PFNGLGETPROGRAMIVPROC glGetProgramiv_func = NULL;
	static PFNGLGETSHADERSOURCEPROC glGetShaderSource_func = NULL;
	static PFNGLGETUNIFORMFVPROC glGetUniformfv_func = NULL;
	static PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation_func = NULL;
	static PFNGLISPROGRAMPROC glIsProgram_func = NULL;
	static PFNGLISSHADERPROC glIsShader_func = NULL;
	static PFNGLLINKPROGRAMPROC glLinkProgram_func = NULL;
	static PFNGLSHADERSOURCEPROC glShaderSource_func = NULL;
	static PFNGLUNIFORM1IPROC glUniform1i_func = NULL;
	static PFNGLUNIFORM2IPROC glUniform2i_func = NULL;
	static PFNGLUNIFORM3IPROC glUniform3i_func = NULL;
	static PFNGLUNIFORM4IPROC glUniform4i_func = NULL;
	static PFNGLUNIFORM1FPROC glUniform1f_func = NULL;
	static PFNGLUNIFORM2FPROC glUniform2f_func = NULL;
	static PFNGLUNIFORM3FPROC glUniform3f_func = NULL;
	static PFNGLUNIFORM4FPROC glUniform4f_func = NULL;
	static PFNGLUNIFORM1FVPROC glUniform1fv_func = NULL;
	static PFNGLUNIFORM2FVPROC glUniform2fv_func = NULL;
	static PFNGLUNIFORM3FVPROC glUniform3fv_func = NULL;
	static PFNGLUNIFORM4FVPROC glUniform4fv_func = NULL;
	static PFNGLUNIFORMMATRIX2FVPROC glUniformMatrix2fv_func = NULL;
	static PFNGLUNIFORMMATRIX3FVPROC glUniformMatrix3fv_func = NULL;
	static PFNGLUNIFORMMATRIX4FVPROC glUniformMatrix4fv_func = NULL;
	static PFNGLUSEPROGRAMPROC glUseProgram_func = NULL;
	static PFNGLVERTEXATTRIB1FPROC glVertexAttrib1f_func = NULL;
	static PFNGLVERTEXATTRIB2FPROC glVertexAttrib2f_func = NULL;
	static PFNGLVERTEXATTRIB3FPROC glVertexAttrib3f_func = NULL;
	static PFNGLVERTEXATTRIB4FPROC glVertexAttrib4f_func = NULL;
	static PFNGLVERTEXATTRIB1FVPROC glVertexAttrib1fv_func = NULL;
	static PFNGLVERTEXATTRIB2FVPROC glVertexAttrib2fv_func = NULL;
	static PFNGLVERTEXATTRIB3FVPROC glVertexAttrib3fv_func = NULL;
	static PFNGLVERTEXATTRIB4FVPROC glVertexAttrib4fv_func = NULL;
	static PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer_func = NULL;
	static PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray_func = NULL;
	static PFNGLDISABLEVERTEXATTRIBARRAYPROC glDisableVertexAttribArray_func = NULL;

	/* OpenGL 2.1 */
	static PFNGLUNIFORMMATRIX2X3FVPROC glUniformMatrix2x3fv_func = NULL;
	static PFNGLUNIFORMMATRIX3X2FVPROC glUniformMatrix3x2fv_func = NULL;
	static PFNGLUNIFORMMATRIX2X4FVPROC glUniformMatrix2x4fv_func = NULL;
	static PFNGLUNIFORMMATRIX4X2FVPROC glUniformMatrix4x2fv_func = NULL;
	static PFNGLUNIFORMMATRIX3X4FVPROC glUniformMatrix3x4fv_func = NULL;
	static PFNGLUNIFORMMATRIX4X3FVPROC glUniformMatrix4x3fv_func = NULL;

	/* OpenGL 1.4 */
	static PFNGLPOINTPARAMETERFVPROC glPointParameterfv_func = NULL;
	static PFNGLSECONDARYCOLOR3FVPROC glSecondaryColor3fv_func = NULL;

	/* GL_ARB_vertex/fragment_program */
	static PFNGLBINDPROGRAMARBPROC glBindProgramARB_func = NULL;
	static PFNGLDELETEPROGRAMSARBPROC glDeleteProgramsARB_func = NULL;
	static PFNGLGENPROGRAMSARBPROC glGenProgramsARB_func = NULL;
	static PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC glGetProgramLocalParameterdvARB_func = NULL;
	static PFNGLISPROGRAMARBPROC glIsProgramARB_func = NULL;
	static PFNGLPROGRAMLOCALPARAMETER4DARBPROC glProgramLocalParameter4dARB_func = NULL;
	static PFNGLPROGRAMLOCALPARAMETER4FVARBPROC glProgramLocalParameter4fvARB_func = NULL;
	static PFNGLPROGRAMSTRINGARBPROC glProgramStringARB_func = NULL;
	static PFNGLVERTEXATTRIB1FARBPROC glVertexAttrib1fARB_func = NULL;

	/* GL_APPLE_vertex_array_object */
	static PFNGLBINDVERTEXARRAYAPPLEPROC glBindVertexArrayAPPLE_func = NULL;
	static PFNGLDELETEVERTEXARRAYSAPPLEPROC glDeleteVertexArraysAPPLE_func = NULL;
	static PFNGLGENVERTEXARRAYSAPPLEPROC glGenVertexArraysAPPLE_func = NULL;
	static PFNGLISVERTEXARRAYAPPLEPROC glIsVertexArrayAPPLE_func = NULL;

	/* GL_EXT_stencil_two_side */
	static PFNGLACTIVESTENCILFACEEXTPROC glActiveStencilFaceEXT_func = NULL;

	/* GL_ARB_buffer_object */
	static PFNGLGENBUFFERSARBPROC glGenBuffersARB_func = NULL;
	static PFNGLDELETEBUFFERSARBPROC glDeleteBuffersARB_func = NULL;
	static PFNGLBINDBUFFERARBPROC glBindBufferARB_func = NULL;
	static PFNGLBUFFERDATAARBPROC glBufferDataARB_func = NULL;
	static PFNGLBUFFERSUBDATAARBPROC glBufferSubDataARB_func = NULL;
	static PFNGLMAPBUFFERARBPROC glMapBufferARB_func = NULL;
	static PFNGLUNMAPBUFFERARBPROC glUnmapBufferARB_func = NULL;

	/* GL_EXT_framebuffer_object */
	static PFNGLISRENDERBUFFEREXTPROC glIsRenderbufferEXT_func = NULL;
	static PFNGLBINDRENDERBUFFEREXTPROC glBindRenderbufferEXT_func = NULL;
	static PFNGLDELETERENDERBUFFERSEXTPROC glDeleteRenderbuffersEXT_func = NULL;
	static PFNGLGENRENDERBUFFERSEXTPROC glGenRenderbuffersEXT_func = NULL;
	static PFNGLRENDERBUFFERSTORAGEEXTPROC glRenderbufferStorageEXT_func = NULL;
	static PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC glGetRenderbufferParameterivEXT_func = NULL;
	static PFNGLISFRAMEBUFFEREXTPROC glIsFramebufferEXT_func = NULL;
	static PFNGLBINDFRAMEBUFFEREXTPROC glBindFramebufferEXT_func = NULL;
	static PFNGLDELETEFRAMEBUFFERSEXTPROC glDeleteFramebuffersEXT_func = NULL;
	static PFNGLGENFRAMEBUFFERSEXTPROC glGenFramebuffersEXT_func = NULL;
	static PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC glCheckFramebufferStatusEXT_func = NULL;
	static PFNGLFRAMEBUFFERTEXTURE1DEXTPROC glFramebufferTexture1DEXT_func = NULL;
	static PFNGLFRAMEBUFFERTEXTURE2DEXTPROC glFramebufferTexture2DEXT_func = NULL;
	static PFNGLFRAMEBUFFERTEXTURE3DEXTPROC glFramebufferTexture3DEXT_func = NULL;
	static PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC glFramebufferRenderbufferEXT_func = NULL;
	static PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC glGetFramebufferAttachmentParameterivEXT_func = NULL;
	static PFNGLGENERATEMIPMAPEXTPROC glGenerateMipmapEXT_func = NULL;

	/* GL_ARB_framebuffer_object */
	static PFNGLISRENDERBUFFERPROC glIsRenderbuffer_func = NULL;
	static PFNGLBINDRENDERBUFFERPROC glBindRenderbuffer_func = NULL;
	static PFNGLDELETERENDERBUFFERSPROC glDeleteRenderbuffers_func = NULL;
	static PFNGLGENRENDERBUFFERSPROC glGenRenderbuffers_func = NULL;
	static PFNGLRENDERBUFFERSTORAGEPROC glRenderbufferStorage_func = NULL;
	static PFNGLGETRENDERBUFFERPARAMETERIVPROC glGetRenderbufferParameteriv_func = NULL;
	static PFNGLISFRAMEBUFFERPROC glIsFramebuffer_func = NULL;
	static PFNGLBINDFRAMEBUFFERPROC glBindFramebuffer_func = NULL;
	static PFNGLDELETEFRAMEBUFFERSPROC glDeleteFramebuffers_func = NULL;
	static PFNGLGENFRAMEBUFFERSPROC glGenFramebuffers_func = NULL;
	static PFNGLCHECKFRAMEBUFFERSTATUSPROC glCheckFramebufferStatus_func = NULL;
	static PFNGLFRAMEBUFFERTEXTURE1DPROC glFramebufferTexture1D_func = NULL;
	static PFNGLFRAMEBUFFERTEXTURE2DPROC glFramebufferTexture2D_func = NULL;
	static PFNGLFRAMEBUFFERTEXTURE3DPROC glFramebufferTexture3D_func = NULL;
	static PFNGLFRAMEBUFFERRENDERBUFFERPROC glFramebufferRenderbuffer_func = NULL;
	static PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC glGetFramebufferAttachmentParameteriv_func = NULL;
	static PFNGLGENERATEMIPMAPPROC glGenerateMipmap_func = NULL;
	static PFNGLBLITFRAMEBUFFERPROC glBlitFramebuffer_func = NULL;
	static PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC glRenderbufferStorageMultisample_func = NULL;
	static PFNGLFRAMEBUFFERTEXTURELAYERPROC glFramebufferTextureLayer_func = NULL;



	static void
	GetExtensionFuncs(void)
	{
	/* OpenGL 2.0 */
	glAttachShader_func = (PFNGLATTACHSHADERPROC) glutGetProcAddress("glAttachShader");
	glBindAttribLocation_func = (PFNGLBINDATTRIBLOCATIONPROC) glutGetProcAddress("glBindAttribLocation");
	glCompileShader_func = (PFNGLCOMPILESHADERPROC) glutGetProcAddress("glCompileShader");
	glCreateProgram_func = (PFNGLCREATEPROGRAMPROC) glutGetProcAddress("glCreateProgram");
	glCreateShader_func = (PFNGLCREATESHADERPROC) glutGetProcAddress("glCreateShader");
	glDeleteProgram_func = (PFNGLDELETEPROGRAMPROC) glutGetProcAddress("glDeleteProgram");
	glDeleteShader_func = (PFNGLDELETESHADERPROC) glutGetProcAddress("glDeleteShader");
	glGetActiveAttrib_func = (PFNGLGETACTIVEATTRIBPROC) glutGetProcAddress("glGetActiveAttrib");
	glGetActiveUniform_func = (PFNGLGETACTIVEUNIFORMPROC) glutGetProcAddress("glGetActiveUniform");
	glGetAttachedShaders_func = (PFNGLGETATTACHEDSHADERSPROC) glutGetProcAddress("glGetAttachedShaders");
	glGetAttribLocation_func = (PFNGLGETATTRIBLOCATIONPROC) glutGetProcAddress("glGetAttribLocation");
	glGetProgramInfoLog_func = (PFNGLGETPROGRAMINFOLOGPROC) glutGetProcAddress("glGetProgramInfoLog");
	glGetShaderInfoLog_func = (PFNGLGETSHADERINFOLOGPROC) glutGetProcAddress("glGetShaderInfoLog");
	glGetProgramiv_func = (PFNGLGETPROGRAMIVPROC) glutGetProcAddress("glGetProgramiv");
	glGetShaderiv_func = (PFNGLGETSHADERIVPROC) glutGetProcAddress("glGetShaderiv");
	glGetShaderSource_func = (PFNGLGETSHADERSOURCEPROC) glutGetProcAddress("glGetShaderSource");
	glGetUniformLocation_func = (PFNGLGETUNIFORMLOCATIONPROC) glutGetProcAddress("glGetUniformLocation");
	glGetUniformfv_func = (PFNGLGETUNIFORMFVPROC) glutGetProcAddress("glGetUniformfv");
	glIsProgram_func = (PFNGLISPROGRAMPROC) glutGetProcAddress("glIsProgram");
	glIsShader_func = (PFNGLISSHADERPROC) glutGetProcAddress("glIsShader");
	glLinkProgram_func = (PFNGLLINKPROGRAMPROC) glutGetProcAddress("glLinkProgram");
	glShaderSource_func = (PFNGLSHADERSOURCEPROC) glutGetProcAddress("glShaderSource");
	glUniform1i_func = (PFNGLUNIFORM1IPROC) glutGetProcAddress("glUniform1i");
	glUniform2i_func = (PFNGLUNIFORM2IPROC) glutGetProcAddress("glUniform2i");
	glUniform3i_func = (PFNGLUNIFORM3IPROC) glutGetProcAddress("glUniform3i");
	glUniform4i_func = (PFNGLUNIFORM4IPROC) glutGetProcAddress("glUniform3i");
	glUniform1f_func = (PFNGLUNIFORM1FPROC) glutGetProcAddress("glUniform1f");
	glUniform2f_func = (PFNGLUNIFORM2FPROC) glutGetProcAddress("glUniform2f");
	glUniform3f_func = (PFNGLUNIFORM3FPROC) glutGetProcAddress("glUniform3f");
	glUniform4f_func = (PFNGLUNIFORM4FPROC) glutGetProcAddress("glUniform4f");
	glUniform1fv_func = (PFNGLUNIFORM1FVPROC) glutGetProcAddress("glUniform1fv");
	glUniform2fv_func = (PFNGLUNIFORM2FVPROC) glutGetProcAddress("glUniform2fv");
	glUniform3fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform3fv");
	glUniform4fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform4fv");
	glUniformMatrix2fv_func = (PFNGLUNIFORMMATRIX2FVPROC) glutGetProcAddress("glUniformMatrix2fv");
	glUniformMatrix3fv_func = (PFNGLUNIFORMMATRIX3FVPROC) glutGetProcAddress("glUniformMatrix3fv");
	glUniformMatrix4fv_func = (PFNGLUNIFORMMATRIX4FVPROC) glutGetProcAddress("glUniformMatrix4fv");
	glUseProgram_func = (PFNGLUSEPROGRAMPROC) glutGetProcAddress("glUseProgram");
	glVertexAttrib1f_func = (PFNGLVERTEXATTRIB1FPROC) glutGetProcAddress("glVertexAttrib1f");
	glVertexAttrib2f_func = (PFNGLVERTEXATTRIB2FPROC) glutGetProcAddress("glVertexAttrib2f");
	glVertexAttrib3f_func = (PFNGLVERTEXATTRIB3FPROC) glutGetProcAddress("glVertexAttrib3f");
	glVertexAttrib4f_func = (PFNGLVERTEXATTRIB4FPROC) glutGetProcAddress("glVertexAttrib4f");
	glVertexAttrib1fv_func = (PFNGLVERTEXATTRIB1FVPROC) glutGetProcAddress("glVertexAttrib1fv");
	glVertexAttrib2fv_func = (PFNGLVERTEXATTRIB2FVPROC) glutGetProcAddress("glVertexAttrib2fv");
	glVertexAttrib3fv_func = (PFNGLVERTEXATTRIB3FVPROC) glutGetProcAddress("glVertexAttrib3fv");
	glVertexAttrib4fv_func = (PFNGLVERTEXATTRIB4FVPROC) glutGetProcAddress("glVertexAttrib4fv");

	glVertexAttribPointer_func = (PFNGLVERTEXATTRIBPOINTERPROC) glutGetProcAddress("glVertexAttribPointer");
	glEnableVertexAttribArray_func = (PFNGLENABLEVERTEXATTRIBARRAYPROC) glutGetProcAddress("glEnableVertexAttribArray");
	glDisableVertexAttribArray_func = (PFNGLDISABLEVERTEXATTRIBARRAYPROC) glutGetProcAddress("glDisableVertexAttribArray");

	/* OpenGL 2.1 */
	glUniformMatrix2x3fv_func = (PFNGLUNIFORMMATRIX2X3FVPROC) glutGetProcAddress("glUniformMatrix2x3fv");
	glUniformMatrix3x2fv_func = (PFNGLUNIFORMMATRIX3X2FVPROC) glutGetProcAddress("glUniformMatrix3x2fv");
	glUniformMatrix2x4fv_func = (PFNGLUNIFORMMATRIX2X4FVPROC) glutGetProcAddress("glUniformMatrix2x4fv");
	glUniformMatrix4x2fv_func = (PFNGLUNIFORMMATRIX4X2FVPROC) glutGetProcAddress("glUniformMatrix4x2fv");
	glUniformMatrix3x4fv_func = (PFNGLUNIFORMMATRIX3X4FVPROC) glutGetProcAddress("glUniformMatrix3x4fv");
	glUniformMatrix4x3fv_func = (PFNGLUNIFORMMATRIX4X3FVPROC) glutGetProcAddress("glUniformMatrix4x3fv");

	/* OpenGL 1.4 */
	glPointParameterfv_func = (PFNGLPOINTPARAMETERFVPROC) glutGetProcAddress("glPointParameterfv");
	glSecondaryColor3fv_func = (PFNGLSECONDARYCOLOR3FVPROC) glutGetProcAddress("glSecondaryColor3fv");

	/* GL_ARB_vertex/fragment_program */
	glBindProgramARB_func = (PFNGLBINDPROGRAMARBPROC) glutGetProcAddress("glBindProgramARB");
	glDeleteProgramsARB_func = (PFNGLDELETEPROGRAMSARBPROC) glutGetProcAddress("glDeleteProgramsARB");
	glGenProgramsARB_func = (PFNGLGENPROGRAMSARBPROC) glutGetProcAddress("glGenProgramsARB");
	glGetProgramLocalParameterdvARB_func = (PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC) glutGetProcAddress("glGetProgramLocalParameterdvARB");
	glIsProgramARB_func = (PFNGLISPROGRAMARBPROC) glutGetProcAddress("glIsProgramARB");
	glProgramLocalParameter4dARB_func = (PFNGLPROGRAMLOCALPARAMETER4DARBPROC) glutGetProcAddress("glProgramLocalParameter4dARB");
	glProgramLocalParameter4fvARB_func = (PFNGLPROGRAMLOCALPARAMETER4FVARBPROC) glutGetProcAddress("glProgramLocalParameter4fvARB");
	glProgramStringARB_func = (PFNGLPROGRAMSTRINGARBPROC) glutGetProcAddress("glProgramStringARB");
	glVertexAttrib1fARB_func = (PFNGLVERTEXATTRIB1FARBPROC) glutGetProcAddress("glVertexAttrib1fARB");

	/* GL_APPLE_vertex_array_object */
	glBindVertexArrayAPPLE_func = (PFNGLBINDVERTEXARRAYAPPLEPROC) glutGetProcAddress("glBindVertexArrayAPPLE");
	glDeleteVertexArraysAPPLE_func = (PFNGLDELETEVERTEXARRAYSAPPLEPROC) glutGetProcAddress("glDeleteVertexArraysAPPLE");
	glGenVertexArraysAPPLE_func = (PFNGLGENVERTEXARRAYSAPPLEPROC) glutGetProcAddress("glGenVertexArraysAPPLE");
	glIsVertexArrayAPPLE_func = (PFNGLISVERTEXARRAYAPPLEPROC) glutGetProcAddress("glIsVertexArrayAPPLE");

	/* GL_EXT_stencil_two_side */
	glActiveStencilFaceEXT_func = (PFNGLACTIVESTENCILFACEEXTPROC) glutGetProcAddress("glActiveStencilFaceEXT");

	/* GL_ARB_vertex_buffer_object */
	glGenBuffersARB_func = (PFNGLGENBUFFERSARBPROC) glutGetProcAddress("glGenBuffersARB");
	glDeleteBuffersARB_func = (PFNGLDELETEBUFFERSARBPROC) glutGetProcAddress("glDeleteBuffersARB");
	glBindBufferARB_func = (PFNGLBINDBUFFERARBPROC) glutGetProcAddress("glBindBufferARB");
	glBufferDataARB_func = (PFNGLBUFFERDATAARBPROC) glutGetProcAddress("glBufferDataARB");
	glBufferSubDataARB_func = (PFNGLBUFFERSUBDATAARBPROC) glutGetProcAddress("glBufferSubDataARB");
	glMapBufferARB_func = (PFNGLMAPBUFFERARBPROC) glutGetProcAddress("glMapBufferARB");
	glUnmapBufferARB_func = (PFNGLUNMAPBUFFERARBPROC) glutGetProcAddress("glUnmapBufferARB");

	/* GL_EXT_framebuffer_object */
	glIsRenderbufferEXT_func = (PFNGLISRENDERBUFFEREXTPROC) glutGetProcAddress("glIsRenderbufferEXT");
	glBindRenderbufferEXT_func = (PFNGLBINDRENDERBUFFEREXTPROC) glutGetProcAddress("glBindRenderbufferEXT");
	glDeleteRenderbuffersEXT_func = (PFNGLDELETERENDERBUFFERSEXTPROC) glutGetProcAddress("glDeleteRenderbuffersEXT");
	glGenRenderbuffersEXT_func = (PFNGLGENRENDERBUFFERSEXTPROC) glutGetProcAddress("glGenRenderbuffersEXT");
	glRenderbufferStorageEXT_func = (PFNGLRENDERBUFFERSTORAGEEXTPROC) glutGetProcAddress("glRenderbufferStorageEXT");
	glGetRenderbufferParameterivEXT_func = (PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC) glutGetProcAddress("glGetRenderbufferParameterivEXT");
	glIsFramebufferEXT_func = (PFNGLISFRAMEBUFFEREXTPROC) glutGetProcAddress("glIsFramebufferEXT");
	glBindFramebufferEXT_func = (PFNGLBINDFRAMEBUFFEREXTPROC) glutGetProcAddress("glBindFramebufferEXT");
	glDeleteFramebuffersEXT_func = (PFNGLDELETEFRAMEBUFFERSEXTPROC) glutGetProcAddress("glDeleteFramebuffersEXT");
	glGenFramebuffersEXT_func = (PFNGLGENFRAMEBUFFERSEXTPROC) glutGetProcAddress("glGenFramebuffersEXT");
	glCheckFramebufferStatusEXT_func = (PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC) glutGetProcAddress("glCheckFramebufferStatusEXT");
	glFramebufferTexture1DEXT_func = (PFNGLFRAMEBUFFERTEXTURE1DEXTPROC) glutGetProcAddress("glFramebufferTexture1DEXT");
	glFramebufferTexture2DEXT_func = (PFNGLFRAMEBUFFERTEXTURE2DEXTPROC) glutGetProcAddress("glFramebufferTexture2DEXT");
	glFramebufferTexture3DEXT_func = (PFNGLFRAMEBUFFERTEXTURE3DEXTPROC) glutGetProcAddress("glFramebufferTexture3DEXT");
	glFramebufferRenderbufferEXT_func = (PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC) glutGetProcAddress("glFramebufferRenderbufferEXT");
	glGetFramebufferAttachmentParameterivEXT_func = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC) glutGetProcAddress("glGetFramebufferAttachmentParameterivEXT");
	glGenerateMipmapEXT_func = (PFNGLGENERATEMIPMAPEXTPROC) glutGetProcAddress("glGenerateMipmapEXT");

	/* GL_ARB_framebuffer_object */
	glIsRenderbuffer_func = (PFNGLISRENDERBUFFERPROC) glutGetProcAddress("glIsRenderbuffer");
	glBindRenderbuffer_func = (PFNGLBINDRENDERBUFFERPROC) glutGetProcAddress("glBindRenderbuffer");
	glDeleteRenderbuffers_func = (PFNGLDELETERENDERBUFFERSPROC) glutGetProcAddress("glDeleteRenderbuffers");
	glGenRenderbuffers_func = (PFNGLGENRENDERBUFFERSPROC) glutGetProcAddress("glGenRenderbuffers");
	glRenderbufferStorage_func = (PFNGLRENDERBUFFERSTORAGEPROC) glutGetProcAddress("glRenderbufferStorage");
	glGetRenderbufferParameteriv_func = (PFNGLGETRENDERBUFFERPARAMETERIVPROC) glutGetProcAddress("glGetRenderbufferParameteriv");
	glIsFramebuffer_func = (PFNGLISFRAMEBUFFERPROC) glutGetProcAddress("glIsFramebuffer");
	glBindFramebuffer_func = (PFNGLBINDFRAMEBUFFERPROC) glutGetProcAddress("glBindFramebuffer");
	glDeleteFramebuffers_func = (PFNGLDELETEFRAMEBUFFERSPROC) glutGetProcAddress("glDeleteFramebuffers");
	glGenFramebuffers_func = (PFNGLGENFRAMEBUFFERSPROC) glutGetProcAddress("glGenFramebuffers");
	glCheckFramebufferStatus_func = (PFNGLCHECKFRAMEBUFFERSTATUSPROC) glutGetProcAddress("glCheckFramebufferStatus");
	glFramebufferTexture1D_func = (PFNGLFRAMEBUFFERTEXTURE1DPROC) glutGetProcAddress("glFramebufferTexture1D");
	glFramebufferTexture2D_func = (PFNGLFRAMEBUFFERTEXTURE2DPROC) glutGetProcAddress("glFramebufferTexture2D");
	glFramebufferTexture3D_func = (PFNGLFRAMEBUFFERTEXTURE3DPROC) glutGetProcAddress("glFramebufferTexture3D");
	glFramebufferRenderbuffer_func = (PFNGLFRAMEBUFFERRENDERBUFFERPROC) glutGetProcAddress("glFramebufferRenderbuffer");
	glGetFramebufferAttachmentParameteriv_func = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC) glutGetProcAddress("glGetFramebufferAttachmentParameteriv");
	glGenerateMipmap_func = (PFNGLGENERATEMIPMAPPROC) glutGetProcAddress("glGenerateMipmap");
	glBlitFramebuffer_func = (PFNGLBLITFRAMEBUFFERPROC) glutGetProcAddress("glBlitFramebuffer");
	glRenderbufferStorageMultisample_func = (PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC) glutGetProcAddress("glRenderbufferStorageMultisample");
	glFramebufferTextureLayer_func = (PFNGLFRAMEBUFFERTEXTURELAYERPROC) glutGetProcAddress("glFramebufferTextureLayer");
	}