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)