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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