.TH "SDL_GL_SetAttribute" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" .SH "NAME"SDL_GL_SetAttribute\- Set a special SDL/OpenGL attribute.SH "SYNOPSIS".PP\fB#include "SDL\&.h".sp\fBint \fBSDL_GL_SetAttribute\fP\fR(\fBSDL_GLattr attr, int value\fR);.SH "DESCRIPTION".PPSets 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\&..SH "RETURN VALUE".PPReturns \fB0\fR on success, or \fB-1\fR on error\&..SH "EXAMPLE".PP.nf\f(CWSDL_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;}\fR.fi.PP.PP.RS\fBNote:  .PPThe \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\&..RE.SH "SEE ALSO".PP\fI\fBSDL_GL_GetAttribute\fP\fR, \fIGL Attributes\fR...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01