SDL_GL_GetProcAddress(3)SDL API ReferenceSDL_GL_GetProcAddress(3)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
SDL Tue 11 Sep 2001, 23SDL_GL_GetProcAddress(3)
