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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.
 ");
   has_multitexture=0;
 }
 .
 .
 .
 .
 if(has_multitexture){
   glActiveTextureARB_ptr(GL_TEXTURE0_ARB);
   .
   .
 }
 else{
   .
   .
 }
 

SEE ALSO

SDL_GL_LoadLibrary