SDL_GL_GetProcAddress.3
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- .TH "SDL_GL_GetProcAddress" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference"
- .SH "NAME"
- SDL_GL_GetProcAddress- Get the address of a GL function
- .SH "SYNOPSIS"
- .PP
- fB#include "SDL&.h"
- .sp
- fBvoid *fBSDL_GL_GetProcAddressfPfR(fBconst char* procfR);
- .SH "DESCRIPTION"
- .PP
- Returns the address of the GL function fBprocfR, or fBNULLfR if the function is not found&. If the GL library is loaded at runtime, with fIfBSDL_GL_LoadLibraryfPfR, then fIallfP GL functions must be retrieved this way&. Usually this is used to retrieve function pointers to OpenGL extensions&.
- .SH "EXAMPLE"
- .PP
- .nf
- f(CWtypedef 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{
- &.
- &.
- }fR
- .fi
- .PP
- .SH "SEE ALSO"
- .PP
- fIfBSDL_GL_LoadLibraryfPfR
- ..." created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01