-/* xlock-gc.c --- xscreensaver compatibility layer for xlockmore GL modules.
- * xscreensaver, Copyright (c) 1997, 1998 Jamie Zawinski <jwz@netscape.com>
+/* xlock-gl.c --- xscreensaver compatibility layer for xlockmore GL modules.
+ * xscreensaver, Copyright (c) 1997, 1998, 1999 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
*
* This file, along with xlockmore.h, make it possible to compile an xlockmore
* GL module into a standalone program, and thus use it with xscreensaver.
- * By Jamie Zawinski <jwz@netscape.com> on 31-May-97.
+ * By Jamie Zawinski <jwz@jwz.org> on 31-May-97.
*/
#include <stdio.h>
return ptr;
}
}
-
-
-Visual *
-get_gl_visual (Screen *screen, char *name, char *class)
-{
- char *string = get_string_resource (name, class);
- XVisualInfo *vi = 0;
- Bool done_once = False;
-
- AGAIN:
- if (!string || !*string ||
- !strcmp (string, "best") ||
- !strcmp (string, "color") ||
- !strcmp (string, "default"))
- {
- Display *dpy = DisplayOfScreen (screen);
- int screen_num = screen_number (screen);
- int attrs[20];
- int i = 0;
- Bool dbuf_p = !get_boolean_resource ("noBuffer", "NoBuffer");
-
- done_once = True;
-
- attrs[i++] = GLX_RGBA;
- attrs[i++] = GLX_RED_SIZE; attrs[i++] = 1;
- attrs[i++] = GLX_GREEN_SIZE; attrs[i++] = 1;
- attrs[i++] = GLX_BLUE_SIZE; attrs[i++] = 1;
- attrs[i++] = GLX_DEPTH_SIZE; attrs[i++] = 1;
- if (dbuf_p)
- attrs[i++] = GLX_DOUBLEBUFFER;
- attrs[i++] = 0;
-
- vi = glXChooseVisual (dpy, screen_num, attrs);
- if (vi) goto DONE;
-
- /* Try without double-buffering. */
- attrs[i - 1] = 0;
- vi = glXChooseVisual (dpy, screen_num, attrs);
- if (vi) goto DONE;
-
- /* Try mono. */
- i = 0;
- if (dbuf_p)
- attrs[i++] = GLX_DOUBLEBUFFER;
- attrs[i++] = 0;
- vi = glXChooseVisual (dpy, screen_num, attrs);
- if (vi) goto DONE;
-
- /* Try mono without double-buffering. */
- attrs[0] = 0;
- vi = glXChooseVisual (dpy, screen_num, attrs);
- }
-
- DONE:
- {
- Visual *v;
- if (vi)
- {
- v = vi->visual;
- XFree (vi);
- }
- else
- {
- v = get_visual (screen, string, False, True);
- if (!v)
- {
- if (done_once)
- v = DefaultVisualOfScreen (screen);
- else
- {
- free (string);
- string = 0;
- goto AGAIN;
- }
- }
- }
-
- free (string);
- return v;
- }
-}