/*
 * $Id$
 *
 * Copyright © 2004 Keith Packard
 *
 * 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, and that the name of Keith Packard not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Keith Packard makes no
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.
 *
 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

#include "lpint.h"

static Bool
init_display (light_pipe_display *lpd)
{
    if (!XFixesQueryExtension (lpd->display, 
			       &lpd->xfixes.event_base,
			       &lpd->xfixes.error_base))
	return False;
    if (!XDamageQueryExtension (lpd->display, 
				&lpd->damage.event_base,
				&lpd->damage.error_base))
	return False;
    if (XCompositeQueryExtension (lpd->display,
				  &lpd->composite.event_base,
				  &lpd->composite.error_base))
    {
	lpd->has_composite = 1;
    }
    return True;
}

light_pipe_display *
_xlightpipe_find_display (Display *display)
{
    light_pipe_display	*lpd;

    if (XFindContext (display, 0, _xlightpipe_lp_context (), (XPointer *) &lpd) == 0)
	return lpd;
    lpd = malloc (sizeof (light_pipe_display));
    if (!lpd)
	return 0;
    lpd->display = display;
    lpd->damaged = 0;
    lpd->has_composite = 0;
    if (!init_display (lpd))
    {
	free (lpd);
	return 0;
    }
    if (XSaveContext (display, 0, _xlightpipe_lp_context (), (char *) lpd) != 0)
    {
	free (lpd);
	return 0;
    }
    return lpd;
}