redhat man page for sdl_gl_setattribute

SDL_GL_SetAttribute(3)						 SDL API Reference					    SDL_GL_SetAttribute(3)

NAME
       SDL_GL_SetAttribute- Set a special SDL/OpenGL attribute

SYNOPSIS
       #include "SDL.h"

       int SDL_GL_SetAttribute(SDL_GLattr attr, int value);

DESCRIPTION
       Sets  the  OpenGL  attribute attr to value. The attributes you set don't take effect until after a call to SDL_SetVideoMode. You should use
       SDL_GL_GetAttribute to check the values after a SDL_SetVideoMode call.

RETURN VALUE
       Returns 0 on success, or -1 on error.

EXAMPLE
       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
       ", SDL_GetError());
	 SDL_Quit();
	 return;
       }

	      Note:

	      The SDL_DOUBLEBUF 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.

SEE ALSO
       SDL_GL_GetAttribute, GL Attributes

SDL
							      Tue 11 Sep 2001, 23:01					    SDL_GL_SetAttribute(3)