SDL_GL_GetProcAddress

Name

SDL_GL_GetProcAddress -- Get the address of a GL function

Synopsis

#include "SDL.h"

void *SDL_GL_GetProcAddress(const char* proc);

Description

Returns the address of the GL function proc, or NULL if the function is not found. If the GL library is loaded at runtime, with SDL_GL_LoadLibrary, then all GL functions must be retrieved this way. Usually this is used to retrieve function pointers to OpenGL extensions.

Example

        typedef void (*GL_ActiveTextureARB_Func)(unsigned int);
        GL_ActiveTextureARB_Func glActiveTextureARB_ptr = 0;
        int has_multitexture=1;
        .
        .
        .
        /* Get function pointer */
        glActiveTextureARB_ptr=(GL_ActiveTextureARB_Func) SDL_GL_GetProcAddress("glActiveTextureARB");
        
        /* Check for a valid function ptr */
        if(!glActiveTextureARB_ptr){
          fprintf(stderr, "Multitexture Extensions not present.\n");
          has_multitexture=0;
        }
        .
        .
        .
        .
        if(has_multitexture){
          glActiveTextureARB_ptr(GL_TEXTURE0_ARB);
          .
          .
        }
        else{
          .
          .
        }

See Also

SDL_GL_LoadLibrary