1 .TH "SDL_GL_SetAttribute" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" 

     2 .SH "NAME"

     3 SDL_GL_SetAttribute \- Set a special SDL/OpenGL attribute

     4 .SH "SYNOPSIS"

     5 .PP

     6 \fB#include "SDL\&.h"

     7 .sp

     8 \fBint \fBSDL_GL_SetAttribute\fP\fR(\fBSDL_GLattr attr, int value\fR);

     9 .SH "DESCRIPTION"

    10 .PP

    11 Sets the OpenGL \fIattribute\fR \fBattr\fR to \fBvalue\fR\&. The attributes you set don\&'t take effect until after a call to \fI\fBSDL_SetVideoMode\fP\fR\&. You should use \fI\fBSDL_GL_GetAttribute\fP\fR to check the values after a \fBSDL_SetVideoMode\fP call\&.

    12 .SH "RETURN VALUE"

    13 .PP

    14 Returns \fB0\fR on success, or \fB-1\fR on error\&.

    15 .SH "EXAMPLE"

    16 .PP

    17 .nf

    18 \f(CWSDL_GL_SetAttribute( SDL_GL_RED_SIZE, 5 );

    19 SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 5 );

    20 SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 5 );

    21 SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, 16 );

    22 SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );

    23 if ( (screen=SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL )) == NULL ) {

    24   fprintf(stderr, "Couldn\&'t set GL mode: %s

    25 ", SDL_GetError());

    26   SDL_Quit();

    27   return;

    28 }\fR

    29 .fi

    30 .PP

    31 .PP

    32 .RS

    33 \fBNote:  

    34 .PP

    35 The \fBSDL_DOUBLEBUF\fP 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\&.

    36 .RE

    37 .SH "SEE ALSO"

    38 .PP

    39 \fI\fBSDL_GL_GetAttribute\fP\fR, \fIGL Attributes\fR

    40 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01