Mercurial > sdl-ios-xcode
diff docs/man3/SDL_GL_GetProcAddress.3 @ 0:74212992fb08
Initial revision
author | Sam Lantinga <slouken@lokigames.com> |
---|---|
date | Thu, 26 Apr 2001 16:45:43 +0000 |
parents | |
children | 55f1f1b3e27d |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/docs/man3/SDL_GL_GetProcAddress.3 Thu Apr 26 16:45:43 2001 +0000 @@ -0,0 +1,48 @@ +.TH "SDL_GL_GetProcAddress" "3" "Mon 12 Mar 2001, 01:04" "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" +.PP +Returns 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, Mon 12 Mar 2001, 01:04