.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_GetProcAddress\fP\fR(\fBconst char* proc\fR);.SH "DESCRIPTION".PPReturns the address of the GL function \fBproc\fR, or \fBNULL\fR if the function is not found\&. If the GL library is loaded at runtime, with \fI\fBSDL_GL_LoadLibrary\fP\fR, then \fIall\fP 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\fI\fBSDL_GL_LoadLibrary\fP\fR...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01