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- <title>"SDL_GL_GetProcAddress"("3") manual page</title>
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- <a href='#toc'>Table of Contents</a><p>
-
- <h2><a name='sect0' href='#toc0'>Name</a></h2>
- SDL_GL_GetProcAddress- Get the address of a GL function
- <h2><a name='sect1' href='#toc1'>Synopsis</a></h2>
- <p>
- <b>#include
- "SDL.h" <p>
- </b><b>void *<b>SDL_GL_GetProcAddress</b></b>(<b>const char* proc</b>);
- <h2><a name='sect2' href='#toc2'>Description</a></h2>
- <p>
- Returns
- the address of the GL function <b>proc</b>, or <b>NULL</b> if the function is not found.
- If the GL library is loaded at runtime, with <i><b>SDL_GL_LoadLibrary</b></i>, then <i>all</i>
- GL functions must be retrieved this way. Usually this is used to retrieve
- function pointers to OpenGL extensions.
- <h2><a name='sect3' href='#toc3'>Example</a></h2>
- <p>
- <br>
- <pre>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{
- .
- .
- }
- </pre><p>
-
- <h2><a name='sect4' href='#toc4'>See Also</a></h2>
- <p>
- <i><b>SDL_GL_LoadLibrary</b></i>
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- <li><a name='toc0' href='#sect0'>Name</a></li>
- <li><a name='toc1' href='#sect1'>Synopsis</a></li>
- <li><a name='toc2' href='#sect2'>Description</a></li>
- <li><a name='toc3' href='#sect3'>Example</a></li>
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