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/* xscreensaver, Copyright (c) 2000, 2002 by Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*/
/* xscreensaver-gl-helper -- prints the ID of the best visual to use
for GL programs on stdout.
*/
#include "utils.h"
#include "visual.h"
#include <GL/gl.h>
#include <GL/glx.h>
char *progname = 0;
char *progclass = "XScreenSaver";
int
main (int argc, char **argv)
{
Display *dpy;
Screen *screen;
Visual *visual;
char *d = getenv ("DISPLAY");
int i;
progname = argv[0];
for (i = 1; i < argc; i++)
{
if (argv[i][0] == '-' && argv[i][1] == '-') argv[i]++;
if (strlen(argv[i]) >= 2 &&
!strncmp ("-display", argv[i], strlen(argv[i])))
{
if (i == argc-1) goto LOSE;
d = argv[i+1];
i++;
}
else
{
LOSE:
fprintf (stderr, "usage: %s [ -display host:dpy.screen ]\n",
progname);
fprintf (stderr,
"This program prints out the ID of the best "
"X visual for GL programs to use.\n");
exit (1);
}
}
dpy = XOpenDisplay (d);
if (!dpy)
{
fprintf (stderr, "%s: couldn't open display %s\n", progname,
(d ? d : "(null)"));
exit (1);
}
screen = DefaultScreenOfDisplay (dpy);
visual = get_gl_visual (screen);
if (visual)
printf ("0x%x\n", (unsigned int) XVisualIDFromVisual (visual));
else
printf ("none\n");
exit (0);
}
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