Mercurial > sdl-ios-xcode
view docs/html/sdlglgetprocaddress.html @ 1621:f12379c41042
Fixes bug #195:
The proper name of Apple's operating system is "Mac OS X" not "MacOS X", as can
bee seen in many places, for example http://www.apple.com/macosx/). This
contrasts the naming of the old operating system, which was called "MacOS" and
today is often refered to as "MacOS Classic".
The attached patches fixes the misuse of the name "MacOS X" in both the SDL12
and sdlweb CVS modules.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Thu, 13 Apr 2006 13:08:26 +0000 |
parents | 355632dca928 |
children |
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<HTML ><HEAD ><TITLE >SDL_GL_GetProcAddress</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="SDL Library Documentation" HREF="index.html"><LINK REL="UP" TITLE="Video" HREF="video.html"><LINK REL="PREVIOUS" TITLE="SDL_GL_LoadLibrary" HREF="sdlglloadlibrary.html"><LINK REL="NEXT" TITLE="SDL_GL_GetAttribute" HREF="sdlglgetattribute.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFF8DC" TEXT="#000000" LINK="#0000ee" VLINK="#551a8b" ALINK="#ff0000" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >SDL Library Documentation</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="sdlglloadlibrary.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="sdlglgetattribute.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SDLGLGETPROCADDRESS" ></A >SDL_GL_GetProcAddress</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN2678" ></A ><H2 >Name</H2 >SDL_GL_GetProcAddress -- Get the address of a GL function</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN2681" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN2682" ></A ><P ></P ><PRE CLASS="FUNCSYNOPSISINFO" >#include "SDL.h"</PRE ><P ><CODE ><CODE CLASS="FUNCDEF" >void *<B CLASS="FSFUNC" >SDL_GL_GetProcAddress</B ></CODE >(const char* proc);</CODE ></P ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN2688" ></A ><H2 >Description</H2 ><P >Returns the address of the GL function <TT CLASS="PARAMETER" ><I >proc</I ></TT >, or <SPAN CLASS="RETURNVALUE" >NULL</SPAN > if the function is not found. If the GL library is loaded at runtime, with <A HREF="sdlglloadlibrary.html" ><TT CLASS="FUNCTION" >SDL_GL_LoadLibrary</TT ></A >, then <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >all</I ></SPAN > GL functions must be retrieved this way. Usually this is used to retrieve function pointers to OpenGL extensions.</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN2696" ></A ><H2 >Example</H2 ><PRE CLASS="PROGRAMLISTING" >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.\n"); has_multitexture=0; } . . . . if(has_multitexture){ glActiveTextureARB_ptr(GL_TEXTURE0_ARB); . . } else{ . . }</PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN2699" ></A ><H2 >See Also</H2 ><P ><A HREF="sdlglloadlibrary.html" ><TT CLASS="FUNCTION" >SDL_GL_LoadLibrary</TT ></A ></P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="sdlglloadlibrary.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="sdlglgetattribute.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SDL_GL_LoadLibrary</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="video.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SDL_GL_GetAttribute</TD ></TR ></TABLE ></DIV ></BODY ></HTML >