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