/*
 * $Id$
 *
 * 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
is_root (Display *dpy, Window window)
{
    int	s;
    
    for (s = 0; s < ScreenCount (dpy); s++)
	if (window == RootWindow (dpy, s))
	    return True;
    return False;
}

Bool
_xlightpipe_init_window (Display *display, Window window, light_pipe_window *lpw)
{
    XWindowAttributes	attr;
    light_pipe_display	*lpd = _xlightpipe_find_display (display);
    int			level;

    if (!lpd)
	return False;
    
    lpw->display = display;
    lpw->window = window;
    XSelectInput (display, window, LP_WINDOW_EVENT_MASK);
    if (!XGetWindowAttributes (display, window, &attr))
	return False;
    
    lpw->public.geometry.x = attr.x;
    lpw->public.geometry.y = attr.y;
    lpw->public.geometry.width = attr.width;
    lpw->public.geometry.height = attr.height;
    lpw->public.border_width = attr.border_width;

    lpw->public.damage.x = 0;
    lpw->public.damage.y = 0;
    lpw->public.damage.width = 0;
    lpw->public.damage.height = 0;
    
    lpw->public.image = 0;

    lpw->display = display;
    lpw->window = window;
    lpw->visual = attr.visual;
    lpw->depth = attr.depth;

    if (lpw->public.damage_region)
	level = XDamageReportDeltaRectangles;
    else
	level = XDamageReportBoundingBox;
    lpw->damage = XDamageCreate (display, window, level);

    lpw->repair = XFixesCreateRegion (display, 0, 0);

    /*
     * Ensure that the window contents are available even when occluded
     */
    if (!is_root (display, window))
	XCompositeRedirectWindow (display, window, CompositeRedirectAutomatic);

    lpw->next_damaged = 0;

    if (!_xlightpipe_create_window_image (lpw))
    {
	XSelectInput (display, window, 0);
	return False;
    }
    
    if (attr.map_state == IsViewable)
	_xlightpipe_damage_window (lpw, 0, 0, attr.width, attr.height);
    return True;
}

void
_xlightpipe_fini_window (Display *display, Window window, light_pipe_window *lpw)
{
    XSelectInput (display, window, 0);
    _xlightpipe_undamage_window (lpw);
    if (!is_root (display, window))
        XCompositeUnredirectWindow (display, window, CompositeRedirectAutomatic);
    XDamageDestroy (display, lpw->damage);
    _xlightpipe_destroy_window_image (lpw);
}