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diff docs/html/sdlglgetprocaddress.html @ 0:74212992fb08

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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
parents
children 55f1f1b3e27d
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+++ b/docs/html/sdlglgetprocaddress.html	Thu Apr 26 16:45:43 2001 +0000
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+<HTML
+><HEAD
+><TITLE
+>SDL_GL_GetProcAddress</TITLE
+><META
+NAME="GENERATOR"
+CONTENT="Modular DocBook HTML Stylesheet Version 1.61
+"><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
+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"
+>Prev</A
+></TD
+><TD
+WIDTH="80%"
+ALIGN="center"
+VALIGN="bottom"
+></TD
+><TD
+WIDTH="10%"
+ALIGN="right"
+VALIGN="bottom"
+><A
+HREF="sdlglgetattribute.html"
+>Next</A
+></TD
+></TR
+></TABLE
+><HR
+ALIGN="LEFT"
+WIDTH="100%"></DIV
+><H1
+><A
+NAME="SDLGLGETPROCADDRESS"
+>SDL_GL_GetProcAddress</A
+></H1
+><DIV
+CLASS="REFNAMEDIV"
+><A
+NAME="AEN2180"
+></A
+><H2
+>Name</H2
+>SDL_GL_GetProcAddress&nbsp;--&nbsp;Get the address of a GL function</DIV
+><DIV
+CLASS="REFSYNOPSISDIV"
+><A
+NAME="AEN2183"
+></A
+><H2
+>Synopsis</H2
+><DIV
+CLASS="FUNCSYNOPSIS"
+><A
+NAME="AEN2184"
+></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="AEN2190"
+></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 <I
+CLASS="EMPHASIS"
+>all</I
+> 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="AEN2198"
+></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="AEN2201"
+></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
+WIDTH="100%"
+BORDER="0"
+CELLPADDING="0"
+CELLSPACING="0"
+><TR
+><TD
+WIDTH="33%"
+ALIGN="left"
+VALIGN="top"
+><A
+HREF="sdlglloadlibrary.html"
+>Prev</A
+></TD
+><TD
+WIDTH="34%"
+ALIGN="center"
+VALIGN="top"
+><A
+HREF="index.html"
+>Home</A
+></TD
+><TD
+WIDTH="33%"
+ALIGN="right"
+VALIGN="top"
+><A
+HREF="sdlglgetattribute.html"
+>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"
+>Up</A
+></TD
+><TD
+WIDTH="33%"
+ALIGN="right"
+VALIGN="top"
+>SDL_GL_GetAttribute</TD
+></TR
+></TABLE
+></DIV
+></BODY
+></HTML
+>
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