forked from KolibriOS/kolibrios
278 lines
3.8 KiB
HTML
278 lines
3.8 KiB
HTML
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<HTML
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><HEAD
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><TITLE
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>SDL_GL_SetAttribute</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.64
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"><LINK
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REL="HOME"
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TITLE="SDL Library Documentation"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Video"
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HREF="video.html"><LINK
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REL="PREVIOUS"
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TITLE="SDL_GL_GetAttribute"
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HREF="sdlglgetattribute.html"><LINK
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REL="NEXT"
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TITLE="SDL_GL_SwapBuffers"
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HREF="sdlglswapbuffers.html"></HEAD
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><BODY
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CLASS="REFENTRY"
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BGCOLOR="#FFF8DC"
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TEXT="#000000"
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LINK="#0000ee"
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VLINK="#551a8b"
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ALINK="#ff0000"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>SDL Library Documentation</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="sdlglgetattribute.html"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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></TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="sdlglswapbuffers.html"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><H1
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><A
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NAME="SDLGLSETATTRIBUTE"
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>SDL_GL_SetAttribute</A
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></H1
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><DIV
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CLASS="REFNAMEDIV"
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><A
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NAME="AEN2323"
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></A
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><H2
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>Name</H2
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>SDL_GL_SetAttribute -- Set a special SDL/OpenGL attribute</DIV
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><DIV
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CLASS="REFSYNOPSISDIV"
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><A
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NAME="AEN2326"
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></A
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><H2
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>Synopsis</H2
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><DIV
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CLASS="FUNCSYNOPSIS"
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><A
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NAME="AEN2327"
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></A
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><P
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></P
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><PRE
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CLASS="FUNCSYNOPSISINFO"
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>#include "SDL.h"</PRE
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><P
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><CODE
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><CODE
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CLASS="FUNCDEF"
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>int <B
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CLASS="FSFUNC"
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>SDL_GL_SetAttribute</B
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></CODE
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>(SDL_GLattr attr, int value);</CODE
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></P
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><P
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></P
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></DIV
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN2333"
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></A
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><H2
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>Description</H2
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><P
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>Sets the OpenGL <A
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HREF="sdlglattr.html"
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>attribute</A
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> <TT
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CLASS="PARAMETER"
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><I
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>attr</I
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></TT
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> to <TT
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CLASS="PARAMETER"
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><I
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>value</I
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></TT
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>. The attributes you set don't take effect until after a call to <A
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HREF="sdlsetvideomode.html"
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><TT
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CLASS="FUNCTION"
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>SDL_SetVideoMode</TT
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></A
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>. You should use <A
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HREF="sdlglgetattribute.html"
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><TT
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CLASS="FUNCTION"
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>SDL_GL_GetAttribute</TT
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></A
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> to check the values after a <TT
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CLASS="FUNCTION"
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>SDL_SetVideoMode</TT
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> call.</P
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN2344"
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></A
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><H2
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>Return Value</H2
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><P
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>Returns <SPAN
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CLASS="RETURNVALUE"
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>0</SPAN
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> on success, or <SPAN
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CLASS="RETURNVALUE"
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>-1</SPAN
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> on error.</P
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN2349"
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></A
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><H2
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>Example</H2
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><PRE
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CLASS="PROGRAMLISTING"
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>SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 5 );
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SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 5 );
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SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 5 );
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SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, 16 );
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SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
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if ( (screen=SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL )) == NULL ) {
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fprintf(stderr, "Couldn't set GL mode: %s\n", SDL_GetError());
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SDL_Quit();
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return;
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}</PRE
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><DIV
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CLASS="NOTE"
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><BLOCKQUOTE
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CLASS="NOTE"
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><P
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><B
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>Note: </B
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>The <TT
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CLASS="LITERAL"
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>SDL_DOUBLEBUF</TT
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> 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
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></BLOCKQUOTE
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></DIV
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN2355"
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></A
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><H2
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>See Also</H2
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><P
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><A
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HREF="sdlglgetattribute.html"
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><TT
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CLASS="FUNCTION"
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>SDL_GL_GetAttribute</TT
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></A
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>,
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<A
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HREF="sdlglattr.html"
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>GL Attributes</A
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></P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="sdlglgetattribute.html"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="sdlglswapbuffers.html"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>SDL_GL_GetAttribute</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="video.html"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>SDL_GL_SwapBuffers</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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>
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