SDL_GL_GetProcAddress - Online Linux Manual PageSection : 3
Updated : Tue 11 Sep 2001, 23:01
Source : SDL
Note : SDL API Reference
NAMESDL_GL_GetProcAddress − Get the address of a GL function
SYNOPSIS#include "SDL.h" void *SDL_GL_GetProcAddress(const char* proc);
DESCRIPTIONReturns 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.
EXAMPLEtypedef 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 ALSOSDL_GL_LoadLibrary 0
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