SDL_GL_GetProcAddress(3) SDL API Reference SDL_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, 23:01 SDL_GL_GetProcAddress(3)