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+<HTML
+><HEAD
+><TITLE
+>SDL_GL_GetProcAddress</TITLE
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+><HR
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+><H1
+><A
+NAME="SDLGLGETPROCADDRESS"
+></A
+>SDL_GL_GetProcAddress</H1
+><DIV
+CLASS="REFNAMEDIV"
+><A
+NAME="AEN2678"
+></A
+><H2
+>Name</H2
+>SDL_GL_GetProcAddress&nbsp;--&nbsp;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
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+>Up</A
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+>
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