| <HTML |
| ><HEAD |
| ><TITLE |
| >SDL_GL_SetAttribute</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_GetAttribute" |
| HREF="sdlglgetattribute.html"><LINK |
| REL="NEXT" |
| TITLE="SDL_GL_SwapBuffers" |
| HREF="sdlglswapbuffers.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="sdlglgetattribute.html" |
| ACCESSKEY="P" |
| >Prev</A |
| ></TD |
| ><TD |
| WIDTH="80%" |
| ALIGN="center" |
| VALIGN="bottom" |
| ></TD |
| ><TD |
| WIDTH="10%" |
| ALIGN="right" |
| VALIGN="bottom" |
| ><A |
| HREF="sdlglswapbuffers.html" |
| ACCESSKEY="N" |
| >Next</A |
| ></TD |
| ></TR |
| ></TABLE |
| ><HR |
| ALIGN="LEFT" |
| WIDTH="100%"></DIV |
| ><H1 |
| ><A |
| NAME="SDLGLSETATTRIBUTE" |
| ></A |
| >SDL_GL_SetAttribute</H1 |
| ><DIV |
| CLASS="REFNAMEDIV" |
| ><A |
| NAME="AEN2742" |
| ></A |
| ><H2 |
| >Name</H2 |
| >SDL_GL_SetAttribute -- Set a special SDL/OpenGL attribute</DIV |
| ><DIV |
| CLASS="REFSYNOPSISDIV" |
| ><A |
| NAME="AEN2745" |
| ></A |
| ><H2 |
| >Synopsis</H2 |
| ><DIV |
| CLASS="FUNCSYNOPSIS" |
| ><A |
| NAME="AEN2746" |
| ></A |
| ><P |
| ></P |
| ><PRE |
| CLASS="FUNCSYNOPSISINFO" |
| >#include "SDL.h"</PRE |
| ><P |
| ><CODE |
| ><CODE |
| CLASS="FUNCDEF" |
| >int <B |
| CLASS="FSFUNC" |
| >SDL_GL_SetAttribute</B |
| ></CODE |
| >(SDL_GLattr attr, int value);</CODE |
| ></P |
| ><P |
| ></P |
| ></DIV |
| ></DIV |
| ><DIV |
| CLASS="REFSECT1" |
| ><A |
| NAME="AEN2752" |
| ></A |
| ><H2 |
| >Description</H2 |
| ><P |
| >Sets the OpenGL <A |
| HREF="sdlglattr.html" |
| >attribute</A |
| > <TT |
| CLASS="PARAMETER" |
| ><I |
| >attr</I |
| ></TT |
| > to <TT |
| CLASS="PARAMETER" |
| ><I |
| >value</I |
| ></TT |
| >. The attributes you set don't take effect until after a call to <A |
| HREF="sdlsetvideomode.html" |
| ><TT |
| CLASS="FUNCTION" |
| >SDL_SetVideoMode</TT |
| ></A |
| >. You should use <A |
| HREF="sdlglgetattribute.html" |
| ><TT |
| CLASS="FUNCTION" |
| >SDL_GL_GetAttribute</TT |
| ></A |
| > to check the values after a <TT |
| CLASS="FUNCTION" |
| >SDL_SetVideoMode</TT |
| > call.</P |
| ></DIV |
| ><DIV |
| CLASS="REFSECT1" |
| ><A |
| NAME="AEN2763" |
| ></A |
| ><H2 |
| >Return Value</H2 |
| ><P |
| >Returns <SPAN |
| CLASS="RETURNVALUE" |
| >0</SPAN |
| > on success, or <SPAN |
| CLASS="RETURNVALUE" |
| >-1</SPAN |
| > on error.</P |
| ></DIV |
| ><DIV |
| CLASS="REFSECT1" |
| ><A |
| NAME="AEN2768" |
| ></A |
| ><H2 |
| >Example</H2 |
| ><PRE |
| CLASS="PROGRAMLISTING" |
| >SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 5 ); |
| SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 5 ); |
| SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 5 ); |
| SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, 16 ); |
| SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 ); |
| if ( (screen=SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL )) == NULL ) { |
| fprintf(stderr, "Couldn't set GL mode: %s\n", SDL_GetError()); |
| SDL_Quit(); |
| return; |
| }</PRE |
| ><DIV |
| CLASS="NOTE" |
| ><BLOCKQUOTE |
| CLASS="NOTE" |
| ><P |
| ><B |
| >Note: </B |
| >The <TT |
| CLASS="LITERAL" |
| >SDL_DOUBLEBUF</TT |
| > flag is not required to enable double buffering when setting an OpenGL video mode. Double buffering is enabled or disabled using the SDL_GL_DOUBLEBUFFER attribute.</P |
| ></BLOCKQUOTE |
| ></DIV |
| ></DIV |
| ><DIV |
| CLASS="REFSECT1" |
| ><A |
| NAME="AEN2774" |
| ></A |
| ><H2 |
| >See Also</H2 |
| ><P |
| ><A |
| HREF="sdlglgetattribute.html" |
| ><TT |
| CLASS="FUNCTION" |
| >SDL_GL_GetAttribute</TT |
| ></A |
| >, |
| <A |
| HREF="sdlglattr.html" |
| >GL Attributes</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="sdlglgetattribute.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="sdlglswapbuffers.html" |
| ACCESSKEY="N" |
| >Next</A |
| ></TD |
| ></TR |
| ><TR |
| ><TD |
| WIDTH="33%" |
| ALIGN="left" |
| VALIGN="top" |
| >SDL_GL_GetAttribute</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_SwapBuffers</TD |
| ></TR |
| ></TABLE |
| ></DIV |
| ></BODY |
| ></HTML |
| > |
