extgl.cpp

PDE simulator on GPU.

    /* Extension names should not have spaces. */
    where = (GLubyte *) strchr(name, ' ');
    if (where || *name == '\0')
        return 0;
    extensions = glGetString(GL_EXTENSIONS);
    /* It takes a bit of care to be fool-proof about parsing the
         OpenGL extensions string. Don't be fooled by sub-strings,
        etc. */
    start = extensions;
    for (;;) 
    {
        where = (GLubyte *) strstr((const char *) start, name);
        if (!where)
            break;
        terminator = where + strlen(name);
        if (where == start || *(where - 1) == ' ')
            if (*terminator == ' ' || *terminator == '\0')
            {
                sprintf(extgl_ExtString, "%s%s ", extgl_ExtString, name);
                return 1;
            }
                
        start = terminator;
    }
    return 0;
}

void extgl_InitARBMultitexture()
{
#if defined(_WIN32) || defined(__CYGWIN__) || defined(__MINGW32__)
#ifdef GL_ARB_multitexture
    if (!extgl_Extensions.ARB_multitexture)
        return;
    glActiveTextureARB = (glActiveTextureARBPROC) extgl_GetProcAddress("glActiveTextureARB");
    glClientActiveTextureARB = (glClientActiveTextureARBPROC) extgl_GetProcAddress("glClientActiveTextureARB");

    glMultiTexCoord1dARB = (glMultiTexCoord1dARBPROC) extgl_GetProcAddress("glMultiTexCoord1dARB");
    glMultiTexCoord1dvARB = (glMultiTexCoord1dvARBPROC) extgl_GetProcAddress("glMultiTexCoord1dvARB");
    glMultiTexCoord1fARB = (glMultiTexCoord1fARBPROC) extgl_GetProcAddress("glMultiTexCoord1fARB");
    glMultiTexCoord1fvARB = (glMultiTexCoord1fvARBPROC) extgl_GetProcAddress("glMultiTexCoord1fvARB");
    glMultiTexCoord1iARB = (glMultiTexCoord1iARBPROC) extgl_GetProcAddress("glMultiTexCoord1iARB");
    glMultiTexCoord1ivARB = (glMultiTexCoord1ivARBPROC) extgl_GetProcAddress("glMultiTexCoord1ivARB");
    glMultiTexCoord1sARB = (glMultiTexCoord1sARBPROC) extgl_GetProcAddress("glMultiTexCoord1sARB");
    glMultiTexCoord1svARB = (glMultiTexCoord1svARBPROC) extgl_GetProcAddress("glMultiTexCoord1svARB");

    glMultiTexCoord2dARB = (glMultiTexCoord2dARBPROC) extgl_GetProcAddress("glMultiTexCoord2dARB");
    glMultiTexCoord2dvARB = (glMultiTexCoord2dvARBPROC) extgl_GetProcAddress("glMultiTexCoord2dvARB");
    glMultiTexCoord2fARB = (glMultiTexCoord2fARBPROC) extgl_GetProcAddress("glMultiTexCoord2fARB");
    glMultiTexCoord2fvARB = (glMultiTexCoord2fvARBPROC) extgl_GetProcAddress("glMultiTexCoord2fvARB");
    glMultiTexCoord2iARB = (glMultiTexCoord2iARBPROC) extgl_GetProcAddress("glMultiTexCoord2iARB");
    glMultiTexCoord2ivARB = (glMultiTexCoord2ivARBPROC) extgl_GetProcAddress("glMultiTexCoord2ivARB");
    glMultiTexCoord2sARB = (glMultiTexCoord2sARBPROC) extgl_GetProcAddress("glMultiTexCoord2sARB");
    glMultiTexCoord2svARB = (glMultiTexCoord2svARBPROC) extgl_GetProcAddress("glMultiTexCoord2svARB");

    glMultiTexCoord3dARB = (glMultiTexCoord3dARBPROC) extgl_GetProcAddress("glMultiTexCoord3dARB");
    glMultiTexCoord3dvARB = (glMultiTexCoord3dvARBPROC) extgl_GetProcAddress("glMultiTexCoord3dvARB");
    glMultiTexCoord3fARB = (glMultiTexCoord3fARBPROC) extgl_GetProcAddress("glMultiTexCoord3fARB");
    glMultiTexCoord3fvARB = (glMultiTexCoord3fvARBPROC) extgl_GetProcAddress("glMultiTexCoord3fvARB");
    glMultiTexCoord3iARB = (glMultiTexCoord3iARBPROC) extgl_GetProcAddress("glMultiTexCoord3iARB");
    glMultiTexCoord3ivARB = (glMultiTexCoord3ivARBPROC) extgl_GetProcAddress("glMultiTexCoord3ivARB");
    glMultiTexCoord3sARB = (glMultiTexCoord3sARBPROC) extgl_GetProcAddress("glMultiTexCoord3sARB");
    glMultiTexCoord3svARB = (glMultiTexCoord3svARBPROC) extgl_GetProcAddress("glMultiTexCoord3svARB");

    glMultiTexCoord4dARB = (glMultiTexCoord4dARBPROC) extgl_GetProcAddress("glMultiTexCoord4dARB");
    glMultiTexCoord4dvARB = (glMultiTexCoord4dvARBPROC) extgl_GetProcAddress("glMultiTexCoord4dvARB");
    glMultiTexCoord4fARB = (glMultiTexCoord4fARBPROC) extgl_GetProcAddress("glMultiTexCoord4fARB");
    glMultiTexCoord4fvARB = (glMultiTexCoord4fvARBPROC) extgl_GetProcAddress("glMultiTexCoord4fvARB");
    glMultiTexCoord4iARB = (glMultiTexCoord4iARBPROC) extgl_GetProcAddress("glMultiTexCoord4iARB");
    glMultiTexCoord4ivARB = (glMultiTexCoord4ivARBPROC) extgl_GetProcAddress("glMultiTexCoord4ivARB");
    glMultiTexCoord4sARB = (glMultiTexCoord4sARBPROC) extgl_GetProcAddress("glMultiTexCoord4sARB");
    glMultiTexCoord4svARB = (glMultiTexCoord4svARBPROC) extgl_GetProcAddress("glMultiTexCoord4svARB");
#endif /* GL_ARB_multitexture */
#endif /* WIN32 */
}


void extgl_InitEXTDepthBoundsTest()
{
#ifdef GL_EXT_depth_bounds_test
    if (!extgl_Extensions.EXT_depth_bounds_test)
        return;
    glDepthBoundsEXT = (glDepthBoundsEXTPROC) extgl_GetProcAddress("glDepthBoundsEXT"); 
#endif /* GL_EXT_depth_bounds_test */
}
void extgl_InitARBVertexBufferObject()
{
#ifdef GL_ARB_vertex_buffer_object
    if (!extgl_Extensions.ARB_vertex_buffer_object)
        return;
    glBindBufferARB = (glBindBufferARBPROC) extgl_GetProcAddress("glBindBufferARB");
    glDeleteBuffersARB = (glDeleteBuffersARBPROC) extgl_GetProcAddress("glDeleteBuffersARB");
    glGenBuffersARB = (glGenBuffersARBPROC) extgl_GetProcAddress("glGenBuffersARB");
    glIsBufferARB = (glIsBufferARBPROC) extgl_GetProcAddress("glIsBufferARB");
    glBufferDataARB = (glBufferDataARBPROC) extgl_GetProcAddress("glBufferDataARB");
    glBufferSubDataARB = (glBufferSubDataARBPROC) extgl_GetProcAddress("glBufferSubDataARB");
    glGetBufferSubDataARB = (glGetBufferSubDataARBPROC) extgl_GetProcAddress("glGetBufferSubDataARB");
    glMapBufferARB = (glMapBufferARBPROC) extgl_GetProcAddress("glMapBufferARB");
    glUnmapBufferARB = (glUnmapBufferARBPROC) extgl_GetProcAddress("glUnmapBufferARB");
    glGetBufferParameterivARB = (glGetBufferParameterivARBPROC) extgl_GetProcAddress("glGetBufferParameterivARB");
    glGetBufferPointervARB = (glGetBufferPointervARBPROC) extgl_GetProcAddress("glGetBufferPointervARB");
#endif /* GL_ARB_vertex_buffer_object */
}


void extgl_InitEXTBlendMinmax()
{
#ifdef GL_EXT_blend_minmax
    if (!extgl_Extensions.EXT_blend_minmax)
        return;
    glBlendEquationEXT = (glBlendEquationEXTPROC) extgl_GetProcAddress("glBlendEquationEXT");
#endif /* GL_EXT_blend_minmax */
}


void extgl_InitEXTBlendColor()
{
#ifdef GL_EXT_blend_color
    if (!extgl_Extensions.EXT_blend_color)
        return;
    glBlendColorEXT = (glBlendColorEXTPROC) extgl_GetProcAddress("glBlendColorEXT");
#endif /* GL_EXT_blend_color */
}

void extgl_InitATIVertexAttribArrayObject()
{
#ifdef GL_ATI_vertex_attrib_array_object
    if (!extgl_Extensions.ATI_vertex_attrib_array_object)
        return;
    glVertexAttribArrayObjectATI = (glVertexAttribArrayObjectATIPROC) extgl_GetProcAddress("glVertexAttribArrayObjectATI");
    glGetVertexAttribArrayObjectfvATI = (glGetVertexAttribArrayObjectfvATIPROC) extgl_GetProcAddress("glGetVertexAttribArrayObjectfvATI");
    glGetVertexAttribArrayObjectivATI = (glGetVertexAttribArrayObjectivATIPROC) extgl_GetProcAddress("glGetVertexAttribArrayObjectivATI");
#endif /* GL_ATI_vertex_attrib_array_object */
}

void extgl_InitATISeparateStencil()
{
#ifdef GL_ATI_separate_stencil
    if (!extgl_Extensions.ATI_separate_stencil)
        return;
    glStencilOpSeparateATI = (glStencilOpSeparateATIPROC) extgl_GetProcAddress("glStencilOpSeparateATI");
    glStencilFuncSeparateATI = (glStencilFuncSeparateATIPROC) extgl_GetProcAddress("glStencilFuncSeparateATI");
#endif /* GL_ATI_separate_stencil */
}

void extgl_InitATIMapObjectBuffer()
{
#ifdef GL_ATI_map_object_buffer
    if (!extgl_Extensions.ATI_map_object_buffer)
        return;
    glMapObjectBufferATI = (glMapObjectBufferATIPROC) extgl_GetProcAddress("glMapObjectBufferATI");
    glUnmapObjectBufferATI = (glUnmapObjectBufferATIPROC) extgl_GetProcAddress("glUnmapObjectBufferATI");
#endif /* GL_ATI_map_object_buffer */
}

void extgl_InitNVPixelDataRange()
{
#ifdef GL_NV_pixel_data_range
    if (!extgl_Extensions.NV_pixel_data_range)
        return;
    glPixelDataRangeNV = (glPixelDataRangeNVPROC) extgl_GetProcAddress("glPixelDataRangeNV");
    glFlushPixelDataRangeNV = (glFlushPixelDataRangeNVPROC) extgl_GetProcAddress("glFlushPixelDataRangeNV");
#endif /* GL_NV_pixel_data_range */
}

void extgl_InitNVHalfFloat()
{
#ifdef GL_NV_half_float
    if (!extgl_Extensions.NV_half_float)
        return;
    glVertex2hNV = (glVertex2hNVPROC) extgl_GetProcAddress("glVertex2hNV");
    glVertex2hvNV = (glVertex2hvNVPROC) extgl_GetProcAddress("glVertex2hvNV");
    glVertex3hNV = (glVertex3hNVPROC) extgl_GetProcAddress("glVertex3hNV");
    glVertex3hvNV = (glVertex3hvNVPROC) extgl_GetProcAddress("glVertex3hvNV");
    glVertex4hNV = (glVertex4hNVPROC) extgl_GetProcAddress("glVertex4hNV");
    glVertex4hvNV = (glVertex4hvNVPROC) extgl_GetProcAddress("glVertex4hvNV");
    glNormal3hNV = (glNormal3hNVPROC) extgl_GetProcAddress("glNormal3hNV");
    glNormal3hvNV = (glNormal3hvNVPROC) extgl_GetProcAddress("glNormal3hvNV");
    glColor3hNV = (glColor3hNVPROC) extgl_GetProcAddress("glColor3hNV");
    glColor3hvNV = (glColor3hvNVPROC) extgl_GetProcAddress("glColor3hvNV");
    glColor4hNV = (glColor4hNVPROC) extgl_GetProcAddress("glColor4hNV");
    glColor4hvNV = (glColor4hvNVPROC) extgl_GetProcAddress("glColor4hvNV");
    glTexCoord1hNV = (glTexCoord1hNVPROC) extgl_GetProcAddress("glTexCoord1hNV");
    glTexCoord1hvNV = (glTexCoord1hvNVPROC) extgl_GetProcAddress("glTexCoord1hvNV");
    glTexCoord2hNV = (glTexCoord2hNVPROC) extgl_GetProcAddress("glTexCoord2hNV");
    glTexCoord2hvNV = (glTexCoord2hvNVPROC) extgl_GetProcAddress("glTexCoord2hvNV");
    glTexCoord3hNV = (glTexCoord3hNVPROC) extgl_GetProcAddress("glTexCoord3hNV");
    glTexCoord3hvNV = (glTexCoord3hvNVPROC) extgl_GetProcAddress("glTexCoord3hvNV");
    glTexCoord4hNV = (glTexCoord4hNVPROC) extgl_GetProcAddress("glTexCoord4hNV");
    glTexCoord4hvNV = (glTexCoord4hvNVPROC) extgl_GetProcAddress("glTexCoord4hvNV");
    
    if ((extgl_Extensions.OpenGL13) || (extgl_Extensions.ARB_multitexture))
    {
        glMultiTexCoord1hNV = (glMultiTexCoord1hNVPROC) extgl_GetProcAddress("glMultiTexCoord1hNV");
        glMultiTexCoord1hvNV = (glMultiTexCoord1hvNVPROC) extgl_GetProcAddress("glMultiTexCoord1hvNV");
        glMultiTexCoord2hNV = (glMultiTexCoord2hNVPROC) extgl_GetProcAddress("glMultiTexCoord2hNV");
        glMultiTexCoord2hvNV = (glMultiTexCoord2hvNVPROC) extgl_GetProcAddress("glMultiTexCoord2hvNV");
        glMultiTexCoord3hNV = (glMultiTexCoord3hNVPROC) extgl_GetProcAddress("glMultiTexCoord3hNV");
        glMultiTexCoord3hvNV = (glMultiTexCoord3hvNVPROC) extgl_GetProcAddress("glMultiTexCoord3hvNV");
        glMultiTexCoord4hNV = (glMultiTexCoord4hNVPROC) extgl_GetProcAddress("glMultiTexCoord4hNV");
        glMultiTexCoord4hvNV = (glMultiTexCoord4hvNVPROC) extgl_GetProcAddress("glMultiTexCoord4hvNV");
    }
    
    if (extgl_Extensions.EXT_fog_coord)
    {
        glFogCoordhNV = (glFogCoordhNVPROC) extgl_GetProcAddress("glFogCoordhNV");
        glFogCoordhvNV = (glFogCoordhvNVPROC) extgl_GetProcAddress("glFogCoordhvNV");
    }
    
    if (extgl_Extensions.EXT_secondary_color)
    {
        glSecondaryColor3hNV = (glSecondaryColor3hNVPROC) extgl_GetProcAddress("glSecondaryColor3hNV");
        glSecondaryColor3hvNV = (glSecondaryColor3hvNVPROC) extgl_GetProcAddress("glSecondaryColor3hvNV");
    }
    
    if (extgl_Extensions.EXT_vertex_weighting)
    {
        glVertexWeighthNV = (glVertexWeighthNVPROC) extgl_GetProcAddress("glVertexWeighthNV");
        glVertexWeighthvNV = (glVertexWeighthvNVPROC) extgl_GetProcAddress("glVertexWeighthvNV");
    }
    
    if (extgl_Extensions.NV_vertex_program)
    {
        glVertexAttrib1hNV = (glVertexAttrib1hNVPROC) extgl_GetProcAddress("glVertexAttrib1hNV");
        glVertexAttrib1hvNV = (glVertexAttrib1hvNVPROC) extgl_GetProcAddress("glVertexAttrib1hvNV");
        glVertexAttrib2hNV = (glVertexAttrib2hNVPROC) extgl_GetProcAddress("glVertexAttrib2hNV");
        glVertexAttrib2hvNV = (glVertexAttrib2hvNVPROC) extgl_GetProcAddress("glVertexAttrib2hvNV");
        glVertexAttrib3hNV = (glVertexAttrib3hNVPROC) extgl_GetProcAddress("glVertexAttrib3hNV");
        glVertexAttrib3hvNV = (glVertexAttrib3hvNVPROC) extgl_GetProcAddress("glVertexAttrib3hvNV");
        glVertexAttrib4hNV = (glVertexAttrib4hNVPROC) extgl_GetProcAddress("glVertexAttrib4hNV");
        glVertexAttrib4hvNV = (glVertexAttrib4hvNVPROC) extgl_GetProcAddress("glVertexAttrib4hvNV");
        glVertexAttribs1hvNV = (glVertexAttribs1hvNVPROC) extgl_GetProcAddress("glVertexAttribs1hvNV");
        glVertexAttribs2hvNV = (glVertexAttribs2hvNVPROC) extgl_GetProcAddress("glVertexAttribs2hvNV");
        glVertexAttribs3hvNV = (glVertexAttribs3hvNVPROC) extgl_GetProcAddress("glVertexAttribs3hvNV");
        glVertexAttribs4hvNV = (glVertexAttribs4hvNVPROC) extgl_GetProcAddress("glVertexAttribs4hvNV");
    }
#endif /* GL_NV_half_float */
}

void extgl_InitATIDrawBuffers()
{
#ifdef GL_ATI_draw_buffers
    if (!extgl_Extensions.ATI_draw_buffers)
        return;
    glDrawBuffersATI = (glDrawBuffersATIPROC) extgl_GetProcAddress("glDrawBuffersATI");
#endif /* GL_ATI_draw_buffers */
}

void extgl_InitARBFragmentProgram()
{
#ifdef GL_ARB_fragment_program
    if (!extgl_Extensions.ARB_fragment_program)
        return;
    glProgramStringARB = (glProgramStringARBPROC) extgl_GetProcAddress("glProgramStringARB");
    glBindProgramARB = (glBindProgramARBPROC) extgl_GetProcAddress("glBindProgramARB");
    glDeleteProgramsARB = (glDeleteProgramsARBPROC) extgl_GetProcAddress("glDeleteProgramsARB");
    glGenProgramsARB = (glGenProgramsARBPROC) extgl_GetProcAddress("glGenProgramsARB");
    glProgramEnvParameter4dARB = (glProgramEnvParameter4dARBPROC) extgl_GetProcAddress("glProgramEnvParameter4dARB");
    glProgramEnvParameter4dvARB = (glProgramEnvParameter4dvARBPROC) extgl_GetProcAddress("glProgramEnvParameter4dvARB");
    glProgramEnvParameter4fARB = (glProgramEnvParameter4fARBPROC) extgl_GetProcAddress("glProgramEnvParameter4fARB");
    glProgramEnvParameter4fvARB = (glProgramEnvParameter4fvARBPROC) extgl_GetProcAddress("glProgramEnvParameter4fvARB");
    glProgramLocalParameter4dARB = (glProgramLocalParameter4dARBPROC) extgl_GetProcAddress("glProgramLocalParameter4dARB");
    glProgramLocalParameter4dvARB = (glProgramLocalParameter4dvARBPROC) extgl_GetProcAddress("glProgramLocalParameter4dvARB");
    glProgramLocalParameter4fARB = (glProgramLocalParameter4fARBPROC) extgl_GetProcAddress("glProgramLocalParameter4fARB");
    glProgramLocalParameter4fvARB = (glProgramLocalParameter4fvARBPROC) extgl_GetProcAddress("glProgramLocalParameter4fvARB");
    glGetProgramEnvParameterdvARB = (glGetProgramEnvParameterdvARBPROC) extgl_GetProcAddress("glGetProgramEnvParameterdvARB");
    glGetProgramEnvParameterfvARB = (glGetProgramEnvParameterfvARBPROC) extgl_GetProcAddress("glGetProgramEnvParameterfvARB");
    glGetProgramLocalParameterdvARB = (glGetProgramLocalParameterdvARBPROC) extgl_GetProcAddress("glGetProgramLocalParameterdvARB");
    glGetProgramLocalParameterfvARB = (glGetProgramLocalParameterfvARBPROC) extgl_GetProcAddress("glGetProgramLocalParameterfvARB");
    glGetProgramivARB = (glGetProgramivARBPROC) extgl_GetProcAddress("glGetProgramivARB");
    glGetProgramStringARB = (glGetProgramStringARBPROC) extgl_GetProcAddress("glGetProgramStringARB");
    glIsProgramARB = (glIsProgramARBPROC) extgl_GetProcAddress("glIsProgramARB");
#endif
}

void extgl_InitNVPrimitiveRestart()
{
#ifdef GL_NV_primitive_restart
    if (!extgl_Extensions.NV_primitive_restart)
        return;
    glPrimitiveRestartNV = (glPrimitiveRestartNVPROC) extgl_GetProcAddress("glPrimitiveRestartNV");
    glPrimitiveRestartIndexNV = (glPrimitiveRestartIndexNVPROC) extgl_GetProcAddress("glPrimitiveRestartIndexNV");
#endif /* GL_NV_primitive_restart */
}

void extgl_InitNVFragmentProgram()
{
#ifdef GL_NV_fragment_program
    if (!extgl_Extensions.NV_fragment_program)
        return;
    glProgramNamedParameter4fNV = (glProgramNamedParameter4fNVPROC) extgl_GetProcAddress("glProgramNamedParameter4fNV");
    glProgramNamedParameter4d