forked from KolibriOS/kolibrios
251 lines
3.4 KiB
HTML
251 lines
3.4 KiB
HTML
|
<HTML
|
||
|
|
><HEAD
|
||
|
|
><TITLE
|
||
|
|
>SDL_GL_GetProcAddress</TITLE
|
||
|
|
><META
|
||
|
|
NAME="GENERATOR"
|
||
|
|
CONTENT="Modular DocBook HTML Stylesheet Version 1.64
|
||
|
|
"><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="AEN2259"
|
||
|
|
></A
|
||
|
|
><H2
|
||
|
|
>Name</H2
|
||
|
|
>SDL_GL_GetProcAddress -- Get the address of a GL function</DIV
|
||
|
|
><DIV
|
||
|
|
CLASS="REFSYNOPSISDIV"
|
||
|
|
><A
|
||
|
|
NAME="AEN2262"
|
||
|
|
></A
|
||
|
|
><H2
|
||
|
|
>Synopsis</H2
|
||
|
|
><DIV
|
||
|
|
CLASS="FUNCSYNOPSIS"
|
||
|
|
><A
|
||
|
|
NAME="AEN2263"
|
||
|
|
></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="AEN2269"
|
||
|
|
></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="AEN2277"
|
||
|
|
></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="AEN2280"
|
||
|
|
></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
|
||
|
|
>
|