path: root/kwin/kompmgr/kompmgr.c

/*
 * $Id$
 *
 * Copyright © 2003 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.
 */


/* Modified by Matthew Hawn. I don't know what to say here so follow what it
   says above. Not that I can really do anything about it
*/

/* Modified by Dan Doel*/

/* Modified by Timothy Pearson
 *
 * CHANGELOG:
 * http://patchwork.freedesktop.org/patch/1049/	[Add default background color option]		08/11/2011
 * http://patchwork.freedesktop.org/patch/1052/ [Prevent flicker on root pixmap change]		08/11/2011
 *
 * TODO:
 * http://patchwork.freedesktop.org/patch/1053/ [Fix window mapping with re-used window ids]
*/

/*
Version 2.x of xcompmgr, kompmgr changes by Thomas L�bking and Heiko Przybyl
check baghira.sf.net for more infos
*/
#define _VERSION_ 2.02
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <sys/poll.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/extensions/Xcomposite.h>
#include <X11/extensions/Xdamage.h>
#include <X11/extensions/Xrender.h>
#include <X11/extensions/shape.h>

#if COMPOSITE_MAJOR > 0 || COMPOSITE_MINOR >= 2
#define HAS_NAME_WINDOW_PIXMAP 1
#endif

#define CAN_DO_USABLE 1

#define _TOPHEIGHT_(x) ((x >> 24) & 0xff)
#define _RIGHTWIDTH_(x) ((x >> 16) & 0xff)
#define _BOTTOMHEIGHT_(x) ((x >> 8) & 0xff)
#define _LEFTWIDTH_(x) (x & 0xff)

typedef struct _ignore {
    struct _ignore	*next;
    unsigned long	sequence;
} ignore;

typedef struct _win {
    struct _win		*next;
    Window		id;
#if HAS_NAME_WINDOW_PIXMAP
    Pixmap		pixmap;
#endif
    XWindowAttributes	a;
#if CAN_DO_USABLE
    Bool		usable;		    /* mapped and all damaged at one point */
    XRectangle		damage_bounds;	    /* bounds of damage */
#endif
    Bool                isInFade;
    int			mode;
    int			damaged;
    Damage		damage;
    Picture		picture;
    Picture		alphaPict;
    Picture		shadowPict;
    XserverRegion	borderSize;
    XserverRegion	decoRegion;
    XserverRegion	contentRegion;
    XserverRegion	extents;
    unsigned int	preShadeOpacity;
    Picture		shadow;
   /*Picture		alpha;*/
    int			shadow_dx;
    int			shadow_dy;
    int			shadow_width;
    int			shadow_height;
    unsigned int	opacity;
    unsigned int	shadowSize;
    Atom                windowType;
    unsigned long	damage_sequence;    /* sequence when damage was created */
    Bool                shapable; /* this will allow window managers to exclude windows if just the deco is tqshaped*/
    unsigned int                 decoHash;
    Picture             dimPicture;

    /* for drawing translucent windows */
    XserverRegion	borderClip;
    struct _win		*prev_trans;
} win;

typedef struct _conv {
    int	    size;
    double  *data;
} conv;

typedef struct _fade {
    struct _fade	*next;
    win			*w;
    double		cur;
    double		finish;
    double		step;
    void		(*callback) (Display *dpy, win *w, Bool gone);
    Display		*dpy;
    unsigned int			decoHash;
    Bool		gone;
} fade;

win             *list;
fade		*fades;
Display		*dpy;
char	        *display = 0;
int		scr;
Window		root;
Picture		rootPicture;
Picture		rootBuffer;
Picture		blackPicture;
Picture		transBlackPicture;
Picture		rootTile;
XserverRegion	allDamage;
Bool		clipChanged;
#if HAS_NAME_WINDOW_PIXMAP
Bool		hasNamePixmap;
#endif
XRenderColor	fill_color;
int		root_height, root_width;
ignore		*ignore_head, **ignore_tail = &ignore_head;
int		xfixes_event, xfixes_error;
int		damage_event, damage_error;
int		composite_event, composite_error;
int		render_event, render_error;
Bool		synchronize;
int		composite_opcode;
Bool		screen_damaged = False;
Bool            disable_argb = False;

int             tqshapeEvent;

/* find these once and be done with it */
Atom		opacityAtom;
Atom		shadowAtom;
Atom		shadeAtom;
Atom		shapableAtom;
Atom            decoHashAtom;
Atom            dimAtom;
Atom            deskChangeAtom;
Atom            winTypeAtom;
Atom            winDesktopAtom;
Atom            winDockAtom;
Atom            winToolbarAtom;
Atom            winMenuAtom;
Atom            winUtilAtom;
Atom            winSplashAtom;
Atom            winDialogAtom;
Atom            winNormalAtom;

/* opacity property name; sometime soon I'll write up an EWMH spec for it */
#define OPACITY_PROP	"_KDE_WM_WINDOW_OPACITY"
#define SHADOW_PROP	"_KDE_WM_WINDOW_SHADOW"
#define SHADE_PROP	"_KDE_WM_WINDOW_SHADE"
#define SHAPABLE_PROP	"_KDE_WM_WINDOW_SHAPABLE"
#define DECOHASH_PROP	"_KDE_WM_WINDOW_DECOHASH"
#define DIM_PROP	"_KDE_WM_WINDOW_DIM"
#define DESKCHANGE_PROP "_KDE_WM_DESKTOP_CHANGE"

#define TRANSLUCENT	0xe0000000
#define OPAQUE		0xffffffff

conv            *gaussianMap;

#define WINDOW_SOLID	0
#define WINDOW_TRANS	1
#define WINDOW_ARGB	2

#define TRANS_OPACITY	0.75

#define DEBUG_REPAINT 0
#define DEBUG_EVENTS 0
#define MONITOR_REPAINT 0

#define SHADOWS		1
#define SHARP_SHADOW	0

typedef enum _compMode {
    CompSimple,		/* looks like a regular X server */
    CompServerShadows,	/* use window alpha for shadow; sharp, but precise */
    CompClientShadows	/* use window extents for shadow, blurred */
} CompMode;

static void
determine_mode(Display *dpy, win *w);
    
static double
get_opacity_percent(Display *dpy, win *w, double def);

static XserverRegion
win_extents (Display *dpy, win *w);

CompMode    compMode = CompSimple;

int	    shadowRadius = 12;
int         shadowOffsetX = 0;
int         shadowOffsetY = 0;
double      shadowOpacity = .75;
XRenderColor shadowColor;

double  fade_in_step =  0.028;
double  fade_out_step = 0.03;
int	fade_delta =	10;
int	fade_time =	0;
Bool	fadeWindows = False;
Bool	fadeMenuWindows = False;
Bool    excludeDockShadows = False;
Bool	fadeTrans = False;

Bool	autoRedirect = False;

/* For shadow precomputation */
int            Gsize = -1;
unsigned char *shadowCorner = NULL;
unsigned char *shadowTop = NULL;

XRenderPictFormat* sXRenderFindVisualFormat(Display *dpy, _Xconst Visual *visual)
{
    XRenderPictFormat* format = XRenderFindVisualFormat(dpy,visual);
    if (format)
        return format;
    else
        return XRenderFindStandardFormat (dpy, PictStandardRGB24);
}

int
get_time_in_milliseconds ()
{
    struct timeval  tv;

    gettimeofday (&tv, NULL);
    return tv.tv_sec * 1000 + tv.tv_usec / 1000;
}

fade *
find_fade (win *w)
{
    fade    *f;
    
    for (f = fades; f; f = f->next)
    {
	if (f->w == w)
	    return f;
    }
    return 0;
}

void dequeue_fade (Display *dpy, fade *f)
{
   fade    **prev;
   f->w->isInFade = False;
   f->w->decoHash = f->decoHash;

   for (prev = &fades; *prev; prev = &(*prev)->next)
      if (*prev == f)
      {
         *prev = f->next;
         if (f->callback)
         {
            (*f->callback) (dpy, f->w, f->gone);
         }
         free (f);
         break;
      }
}

void
cleanup_fade (Display *dpy, win *w)
{
    fade *f = find_fade (w);
    if (f)
      dequeue_fade (dpy, f);
}

void
enqueue_fade (Display *dpy, fade *f)
{
    f->w->isInFade = True;
    if (!fades)
      fade_time = get_time_in_milliseconds () + fade_delta;
    f->next = fades;
    fades = f;
}

static void unmap_callback (Display *dpy, win *w, Bool gone);

static void
set_fade (Display *dpy, win *w, double start, double finish, double step,
		void (*callback) (Display *dpy, win *w, Bool gone),
		Bool gone, Bool exec_callback, Bool override, Bool wholeWin)
{
	fade    *f;

	f = find_fade (w);
	if (!f)
	{
		if (start == finish)
			return;
		f = malloc (sizeof (fade));
		f->next = 0;
		f->w = w;
		f->decoHash = w->decoHash;
		f->cur = start;
		enqueue_fade (dpy, f);
	}
	else if(!override)
		return;
	else
	{
		if (exec_callback && f->callback)
			(*f->callback)(dpy, f->w, f->gone);
	}
	if (finish < 0)
		finish = 0;
	if (finish > 1)
		finish = 1;
	f->finish = finish;
	if (f->cur < finish)
		f->step = step;
	else if (f->cur > finish)
		f->step = -step;
	f->gone = gone && (exec_callback || f->callback != unmap_callback);
	f->callback = callback;
	w->opacity = f->cur * OPAQUE;
	if (wholeWin)
		w->decoHash = 0;
#if 0
	printf ("set_fade start %g step %g\n", f->cur, f->step);
#endif
	determine_mode (dpy, w);
	if (w->shadow)
	{
		XRenderFreePicture (dpy, w->shadow);
		w->shadow = None;
                if( w->extents != None )
                    XFixesDestroyRegion( dpy, w->extents );
		w->extents = win_extents (dpy, w);
	}
}

	int
fade_timeout (void)
{
	int now;
	int	delta;
	if (!fades)
		return -1;
	now = get_time_in_milliseconds();
	delta = fade_time - now;
	if (delta < 0)
		delta = 0;
	/*    printf ("timeout %d\n", delta); */
	return delta;
}

	void
run_fades (Display *dpy)
{
	int	    now = get_time_in_milliseconds();
	fade    *f, *next;
	int	    steps;
	Bool    need_dequeue;

#if 0
	printf ("run fades\n");
#endif
	if (fade_time - now > 0)
		return;
	steps = 1 + (now - fade_time) / fade_delta;
        for (next = fades; (f = next); )
	{
		win *w = f->w;
		next = f->next;
		f->cur += f->step * steps;
		if (f->cur >= 1)
			f->cur = 1;
		else if (f->cur < 0)
			f->cur = 0;
#if 0
		printf ("opacity now %g -> %g\n", f->cur, f->finish);
#endif
		w->opacity = f->cur * OPAQUE;
		need_dequeue = False;
		if (f->step > 0)
		{
			if (f->cur >= f->finish)
			{
				w->opacity = f->finish*OPAQUE;
				need_dequeue = True;
			}
		}
		else
		{
			if (f->cur <= f->finish)
			{
				w->opacity = f->finish*OPAQUE;
				need_dequeue = True;
			}
		}
		if (w->shadow)
		{
			XRenderFreePicture (dpy, w->shadow);
			w->shadow = None;
                        if( w->extents != None )
                            XFixesDestroyRegion( dpy, w->extents );
			w->extents = win_extents(dpy, w);
		}
      determine_mode (dpy, w);
      /* Must do this last as it might destroy f->w in callbacks */
      if (need_dequeue)
         dequeue_fade (dpy, f);
	}
	fade_time = now + fade_delta;
}

#define SHADOW_OFFSET_X	((-shadowRadius * 7 / 5) - shadowOffsetX * shadowRadius / 100) * w->shadowSize
#define SHADOW_OFFSET_Y	((-shadowRadius * 7 / 5) - shadowOffsetY * shadowRadius / 100) * w->shadowSize
/*#define SHADOW_OFFSET_X	(w->shadowSize * -shadowRadius * 7 / 500) - w->shadowSize * shadowOffsetX * shadowRadius / 10000
#define SHADOW_OFFSET_Y	(w->shadowSize * -shadowRadius * 7 / 500) - w->shadowSize * shadowOffsetY * shadowRadius / 10000*/

	static double
gaussian (double r, double x, double y)
{
	return ((1 / (sqrt (2 * M_PI * r))) *
			exp ((- (x * x + y * y)) / (2 * r * r)));
}


	static conv *
make_gaussian_map (Display *dpy, double r)
{
	conv	    *c;
	int		    size = ((int) ceil ((r * 3)) + 1) & ~1;
	int		    center = size / 2;
	int		    x, y;
	double	    t;
	double	    g;

	c = malloc (sizeof (conv) + size * size * sizeof (double));
	c->size = size;
	c->data = (double *) (c + 1);
	t = 0.0;
	for (y = 0; y < size; y++)
		for (x = 0; x < size; x++)
		{
			g = gaussian (r, (double) (x - center), (double) (y - center));
			t += g;
			c->data[y * size + x] = g;
		}
	/*    printf ("gaussian total %f\n", t); */
	for (y = 0; y < size; y++)
		for (x = 0; x < size; x++)
		{
			c->data[y*size + x] /= t;
		}
	return c;
}

/*
 * A picture will help
 *
 *	-center   0                width  width+center
 *  -center +-----+-------------------+-----+
 *	    |     |                   |     |
 *	    |     |                   |     |
 *        0 +-----+-------------------+-----+
 *	    |     |                   |     |
 *	    |     |                   |     |
 *	    |     |                   |     |
 *   height +-----+-------------------+-----+
 *	    |     |                   |     |
 * height+  |     |                   |     |
 *  center  +-----+-------------------+-----+
 */

	static unsigned char
sum_gaussian (conv *map, double opacity, int x, int y, int width, int height)
{
	int	    fx, fy;
	double  *g_data;
	double  *g_line = map->data;
	int	    g_size = map->size;
	int	    center = g_size / 2;
	int	    fx_start, fx_end;
	int	    fy_start, fy_end;
	double  v;

	/*
	 * Compute set of filter values which are "in range",
	 * that's the set with:
	 *	0 <= x + (fx-center) && x + (fx-center) < width &&
	 *  0 <= y + (fy-center) && y + (fy-center) < height
	 *
	 *  0 <= x + (fx - center)	x + fx - center < width
	 *  center - x <= fx	fx < width + center - x
	 */

	fx_start = center - x;
	if (fx_start < 0)
		fx_start = 0;
	fx_end = width + center - x;
	if (fx_end > g_size)
		fx_end = g_size;

	fy_start = center - y;
	if (fy_start < 0)
		fy_start = 0;
	fy_end = height + center - y;
	if (fy_end > g_size)
		fy_end = g_size;

	g_line = g_line + fy_start * g_size + fx_start;

	v = 0;
	for (fy = fy_start; fy < fy_end; fy++)
	{
		g_data = g_line;
		g_line += g_size;

		for (fx = fx_start; fx < fx_end; fx++)
			v += *g_data++;
	}
	if (v > 1)
		v = 1;

	return ((unsigned char) (v * opacity * 255.0));
}

/* precompute shadow corners and sides to save time for large windows */
	static void
presum_gaussian (conv *map)
{
	int center = map->size/2;
	int opacity, x, y;

	Gsize = map->size;

	if (shadowCorner)
		free ((void *)shadowCorner);
	if (shadowTop)
		free ((void *)shadowTop);

	shadowCorner = (unsigned char *)(malloc ((Gsize + 1) * (Gsize + 1) * 26));
	shadowTop = (unsigned char *)(malloc ((Gsize + 1) * 26));

	for (x = 0; x <= Gsize; x++)
	{
		shadowTop[25 * (Gsize + 1) + x] = sum_gaussian (map, 1, x - center, center, Gsize * 2, Gsize * 2);
		for(opacity = 0; opacity < 25; opacity++)
			shadowTop[opacity * (Gsize + 1) + x] = shadowTop[25 * (Gsize + 1) + x] * opacity / 25;
		for(y = 0; y <= x; y++)
		{
			shadowCorner[25 * (Gsize + 1) * (Gsize + 1) + y * (Gsize + 1) + x]
				= sum_gaussian (map, 1, x - center, y - center, Gsize * 2, Gsize * 2);
			shadowCorner[25 * (Gsize + 1) * (Gsize + 1) + x * (Gsize + 1) + y]
				= shadowCorner[25 * (Gsize + 1) * (Gsize + 1) + y * (Gsize + 1) + x];
			for(opacity = 0; opacity < 25; opacity++)
				shadowCorner[opacity * (Gsize + 1) * (Gsize + 1) + y * (Gsize + 1) + x]
					= shadowCorner[opacity * (Gsize + 1) * (Gsize + 1) + x * (Gsize + 1) + y]
					= shadowCorner[25 * (Gsize + 1) * (Gsize + 1) + y * (Gsize + 1) + x] * opacity / 25;
		}
	}
}

	static XImage *
make_shadow (Display *dpy, double opacity, int width, int height)
{
	XImage	    *ximage;
	unsigned char   *data;
	int		    gsize = gaussianMap->size;
	int		    ylimit, xlimit;
	int		    swidth = width + gsize;
	int		    sheight = height + gsize;
	int		    center = gsize / 2;
	int		    x, y;
	unsigned char   d;
	int		    x_diff;
	int             opacity_int = (int)(opacity * 25);
	data = malloc (swidth * sheight * sizeof (unsigned char));
	if (!data)
		return 0;
	ximage = XCreateImage (dpy,
			DefaultVisual(dpy, DefaultScreen(dpy)),
			8,
			ZPixmap,
			0,
			(char *) data,
			swidth, sheight, 8, swidth * sizeof (unsigned char));
	if (!ximage)
	{
		free (data);
		return 0;
	}
	/*
	 * Build the gaussian in sections
	 */

	/*
	 * center (fill the complete data array)
	 */
	if (Gsize > 0)
		d = shadowTop[opacity_int * (Gsize + 1) + Gsize];
	else
		d = sum_gaussian (gaussianMap, opacity, center, center, width, height);
	memset(data, d, sheight * swidth);

	/*
	 * corners
	 */
	ylimit = gsize;
	if (ylimit > sheight / 2)
		ylimit = (sheight + 1) / 2;
	xlimit = gsize;
	if (xlimit > swidth / 2)
		xlimit = (swidth + 1) / 2;

	for (y = 0; y < ylimit; y++)
		for (x = 0; x < xlimit; x++)
		{
			if (xlimit == Gsize && ylimit == Gsize)
				d = shadowCorner[opacity_int * (Gsize + 1) * (Gsize + 1) + y * (Gsize + 1) + x];
			else
				d = sum_gaussian (gaussianMap, opacity, x - center, y - center, width, height);
			data[y * swidth + x] = d;
			data[(sheight - y - 1) * swidth + x] = d;
			data[(sheight - y - 1) * swidth + (swidth - x - 1)] = d;
			data[y * swidth + (swidth - x - 1)] = d;
		}

	/*
	 * top/bottom
	 */
	x_diff = swidth - (gsize * 2);
	if (x_diff > 0 && ylimit > 0)
	{
		for (y = 0; y < ylimit; y++)
		{
			if (ylimit == Gsize)
				d = shadowTop[opacity_int * (Gsize + 1) + y];
			else
				d = sum_gaussian (gaussianMap, opacity, center, y - center, width, height);
			memset (&data[y * swidth + gsize], d, x_diff);
			memset (&data[(sheight - y - 1) * swidth + gsize], d, x_diff);
		}
	}

	/*
	 * sides
	 */

	for (x = 0; x < xlimit; x++)
	{
		if (xlimit == Gsize)
			d = shadowTop[opacity_int * (Gsize + 1) + x];
		else
			d = sum_gaussian (gaussianMap, opacity, x - center, center, width, height);
		for (y = gsize; y < sheight - gsize; y++)
		{
			data[y * swidth + x] = d;
			data[y * swidth + (swidth - x - 1)] = d;
		}
	}

	return ximage;
}

	static Picture
shadow_picture (Display *dpy, double opacity, Picture alpha_pict, int width, int height, int *wp, int *hp)
{
	XImage  *shadowImage;
	Pixmap  shadowPixmap;
	Pixmap  finalPixmap;
	Picture shadowPicture;
	Picture finalPicture;
	GC	    gc;

	shadowImage = make_shadow (dpy, opacity, width, height);
	if (!shadowImage)
		return None;
	shadowPixmap = XCreatePixmap (dpy, root, 
			shadowImage->width,
			shadowImage->height,
			8);
	if (!shadowPixmap)
	{
		XDestroyImage (shadowImage);
		return None;
	}

	shadowPicture = XRenderCreatePicture (dpy, shadowPixmap,
			XRenderFindStandardFormat (dpy, PictStandardA8),
			0, 0);
	if (!shadowPicture)
	{
		XDestroyImage (shadowImage);
		XFreePixmap (dpy, shadowPixmap);
		return None;
	}

	gc = XCreateGC (dpy, shadowPixmap, 0, 0);
	if (!gc)
	{
		XDestroyImage (shadowImage);
		XFreePixmap (dpy, shadowPixmap);
		XRenderFreePicture (dpy, shadowPicture);
		return None;
	}

	XPutImage (dpy, shadowPixmap, gc, shadowImage, 0, 0, 0, 0, 
			shadowImage->width,
			shadowImage->height);
	*wp = shadowImage->width;
	*hp = shadowImage->height;
	XFreeGC (dpy, gc);
	XDestroyImage (shadowImage);
	XFreePixmap (dpy, shadowPixmap);
	return shadowPicture;
}

	Picture
solid_picture (Display *dpy, Bool argb, double a, double r, double g, double b)
{
	Pixmap			pixmap;
	Picture			picture;
	XRenderPictureAttributes	pa;
	XRenderColor		c;

	pixmap = XCreatePixmap (dpy, root, 1, 1, argb ? 32 : 8);
	if (!pixmap)
		return None;

	pa.repeat = True;
	picture = XRenderCreatePicture (dpy, pixmap,
			XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8),
			CPRepeat,
			&pa);
	if (!picture)
	{
		XFreePixmap (dpy, pixmap);
		return None;
	}

	c.alpha = a * 0xffff;
	c.red = r * 0xffff;
	c.green = g * 0xffff;
	c.blue = b * 0xffff;
	XRenderFillRectangle (dpy, PictOpSrc, picture, &c, 0, 0, 1, 1);
	XFreePixmap (dpy, pixmap);
	return picture;
}

	void
discard_ignore (Display *dpy, unsigned long sequence)
{
	while (ignore_head)
	{
		if ((long) (sequence - ignore_head->sequence) > 0)
		{
			ignore  *next = ignore_head->next;
			free (ignore_head);
			ignore_head = next;
			if (!ignore_head)
				ignore_tail = &ignore_head;
		}
		else
			break;
	}
}

	void
set_ignore (Display *dpy, unsigned long sequence)
{
	ignore  *i = malloc (sizeof (ignore));
	if (!i)
		return;
	i->sequence = sequence;
	i->next = 0;
	*ignore_tail = i;
	ignore_tail = &i->next;
}

	int
should_ignore (Display *dpy, unsigned long sequence)
{
	discard_ignore (dpy, sequence);
	return ignore_head && ignore_head->sequence == sequence;
}

	static win *
find_win (Display *dpy, Window id)
{
	win	*w;

	for (w = list; w; w = w->next)
		if (w->id == id)
			return w;
	return 0;
}

static char *backgroundProps[] = {
	"_XROOTPMAP_ID",
	"_XSETROOT_ID",
	0,
};

static Picture
root_tile (Display *dpy)
{
	Picture	    picture;
	Atom	    actual_type;
	Pixmap	    pixmap;
	int		    actual_format;
	unsigned long   nitems;
	unsigned long   bytes_after;
	unsigned char   *prop;
	Bool	    fill;
	XRenderPictureAttributes	pa;
	int		    p;

	pixmap = None;
	for (p = 0; backgroundProps[p]; p++)
	{
		if (XGetWindowProperty (dpy, root, XInternAtom (dpy, backgroundProps[p], False),
					0, 4, False, AnyPropertyType,
					&actual_type, &actual_format, &nitems, &bytes_after, &prop) == Success &&
				actual_type == XInternAtom (dpy, "PIXMAP", False) && actual_format == 32 && nitems == 1)
		{
			pixmap = *(long*)prop;
			XFree (prop);
			fill = False;
			break;
		}
	}
	if (!pixmap)
	{
		pixmap = XCreatePixmap (dpy, root, 1, 1, DefaultDepth (dpy, scr));
		fill = True;
	}
	pa.repeat = True;
	picture = XRenderCreatePicture (dpy, pixmap,
			sXRenderFindVisualFormat (dpy,
				DefaultVisual (dpy, scr)),
			CPRepeat, &pa);
	if (fill)
	{
		XRenderFillRectangle (dpy, PictOpSrc, picture, &fill_color,
				0, 0, 1, 1);
	}
	return picture;
}

static void
paint_root (Display *dpy)
{
	if (!rootTile)
		rootTile = root_tile (dpy);

	XRenderComposite (dpy, PictOpSrc,
			rootTile, None, rootBuffer,
			0, 0, 0, 0, 0, 0, root_width, root_height);
}

static XserverRegion
win_extents (Display *dpy, win *w)
{
	XRectangle	    r;

	r.x = w->a.x;
	r.y = w->a.y;
	r.width = w->a.width + w->a.border_width * 2;
	r.height = w->a.height + w->a.border_width * 2;
	if (compMode != CompSimple && w->shadowSize > 0 && !(w->windowType == winDockAtom && excludeDockShadows))
	{
		if (compMode == CompServerShadows || w->mode != WINDOW_ARGB)
		{
			XRectangle  sr;

			if (compMode == CompServerShadows)
			{
				w->shadow_dx = 2;
				w->shadow_dy = 7;
				w->shadow_width = w->a.width;
				w->shadow_height = w->a.height;
			}
			else
			{
				w->shadow_dx = SHADOW_OFFSET_X;
				w->shadow_dx = w->shadow_dx / 100;
				w->shadow_dy = SHADOW_OFFSET_Y;
				w->shadow_dy = w->shadow_dy / 100;
				if (!w->shadow)
				{
					double	opacity = shadowOpacity;
					if (w->shadowSize > 100)
						opacity = opacity/(w->shadowSize*0.015);
					if (w->mode == WINDOW_TRANS)
						opacity = opacity * ((double)w->opacity)/((double)OPAQUE);
					w->shadow = shadow_picture (dpy, opacity, w->alphaPict,
							w->a.width + w->a.border_width * 2 - 2*(shadowRadius - (w->shadowSize*shadowRadius/100)) ,
							w->a.height + w->a.border_width * 2 - 2*(shadowRadius - (w->shadowSize*shadowRadius/100)),
							&w->shadow_width, &w->shadow_height);
   				/*int kill;
   				w->alpha = shadow_picture (dpy, 0.9, w->alphaPict,
   				                            w->a.width + w->a.border_width * 2,
   				                            w->a.height + w->a.border_width * 2,
   				                            &kill, &kill);*/
				}
			}
			sr.x = w->a.x + w->shadow_dx;
			sr.y = w->a.y + w->shadow_dy;
			sr.width = w->shadow_width;
			sr.height = w->shadow_height;
			if (sr.x < r.x)
			{
				r.width = (r.x + r.width) - sr.x;
				r.x = sr.x;
			}
			if (sr.y < r.y)
			{
				r.height = (r.y + r.height) - sr.y;
				r.y = sr.y;
			}
			if (sr.x + sr.width > r.x + r.width)
				r.width = sr.x + sr.width - r.x;
			if (sr.y + sr.height > r.y + r.height)
				r.height = sr.y + sr.height - r.y;
		}
	}
	return XFixesCreateRegion (dpy, &r, 1);
}

	static XserverRegion
border_size (Display *dpy, win *w)
{
	XserverRegion   border;
	/*
	 * if window doesn't exist anymore,  this will generate an error
	 * as well as not generate a region.  Perhaps a better XFixes
	 * architecture would be to have a request that copies instead
	 * of creates, that way you'd just end up with an empty region
	 * instead of an invalid XID.
	 */
	set_ignore (dpy, NextRequest (dpy));
	border = XFixesCreateRegionFromWindow (dpy, w->id, WindowRegionBounding);
	/* translate this */
	set_ignore (dpy, NextRequest (dpy));
	XFixesTranslateRegion (dpy, border,
			w->a.x + w->a.border_width,
			w->a.y + w->a.border_width);
	return border;
}

	static XserverRegion
deco_region (Display *dpy, win *w)
{
	XserverRegion   title;
	XRectangle	    r; /*titlebounding rect*/
	/*
	 * if window doesn't exist anymore,  this will generate an error
	 * as well as not generate a region.  Perhaps a better XFixes
	 * architecture would be to have a request that copies instead
	 * of creates, that way you'd just end up with an empty region
	 * instead of an invalid XID.
	 */
   r.x = w->a.x - w->a.border_width + _LEFTWIDTH_(w->decoHash);
   r.y = w->a.y - w->a.border_width + _TOPHEIGHT_(w->decoHash);
   r.width = w->a.width + w->a.border_width * 2 - _LEFTWIDTH_(w->decoHash) - _RIGHTWIDTH_(w->decoHash);
   r.height = w->a.height + w->a.border_width - _TOPHEIGHT_(w->decoHash) - _BOTTOMHEIGHT_(w->decoHash);
	set_ignore (dpy, NextRequest (dpy));
	title = XFixesCreateRegion (dpy, &r, 1);
	if (!w->borderSize)
		w->borderSize = border_size (dpy, w);
	set_ignore (dpy, NextRequest (dpy));
   XFixesSubtractRegion(dpy, title, w->borderSize, title);
	return title;
}

	static XserverRegion
content_region (Display *dpy, win *w)
{
	XserverRegion   content;
	XRectangle	    r; /*contentbounding rect*/
	/*
	 * if window doesn't exist anymore,  this will generate an error
	 * as well as not generate a region.  Perhaps a better XFixes
	 * architecture would be to have a request that copies instead
	 * of creates, that way you'd just end up with an empty region
	 * instead of an invalid XID.
	 */
   r.x = w->a.x - w->a.border_width + _LEFTWIDTH_(w->decoHash);
   r.y = w->a.y - w->a.border_width + _TOPHEIGHT_(w->decoHash);
   r.width = w->a.width + w->a.border_width * 2 - _LEFTWIDTH_(w->decoHash) - _RIGHTWIDTH_(w->decoHash);
   r.height = w->a.height + w->a.border_width - _TOPHEIGHT_(w->decoHash) - _BOTTOMHEIGHT_(w->decoHash);
	set_ignore (dpy, NextRequest (dpy));
	content = XFixesCreateRegion (dpy, &r, 1);
	if (!w->borderSize)
		w->borderSize = border_size (dpy, w);
	set_ignore (dpy, NextRequest (dpy));
	XFixesIntersectRegion(dpy, content, w->borderSize, content);
	return content;
}

	static void
paint_all (Display *dpy, XserverRegion region)
{
	win	*w;
	win	*t = 0;

	if (!region)
	{
		XRectangle  r;
		r.x = 0;
		r.y = 0;
		r.width = root_width;
		r.height = root_height;
		region = XFixesCreateRegion (dpy, &r, 1);
	}
#if MONITOR_REPAINT
	rootBuffer = rootPicture;
#else
	if (!rootBuffer)
	{
		Pixmap	rootPixmap = XCreatePixmap (dpy, root, root_width, root_height,
				DefaultDepth (dpy, scr));
		rootBuffer = XRenderCreatePicture (dpy, rootPixmap,
				sXRenderFindVisualFormat (dpy,
					DefaultVisual (dpy, scr)),
				0, 0);
		XFreePixmap (dpy, rootPixmap);
	}
#endif
	XFixesSetPictureClipRegion (dpy, rootPicture, 0, 0, region);
#if MONITOR_REPAINT
	XRenderComposite (dpy, PictOpSrc, blackPicture, None, rootPicture,
			0, 0, 0, 0, 0, 0, root_width, root_height);
#endif
#if DEBUG_REPAINT
	printf ("paint:");
#endif
	for (w = list; w; w = w->next)
	{
#if CAN_DO_USABLE
		if (!w->usable)
			continue;
#endif
		/* never painted, ignore it */
		if ((!screen_damaged) && (!w->damaged))
			continue;

		/* skip invisible windows */
		if (w->a.x + w->a.width < 1 || w->a.y + w->a.height < 1 || w->a.x >= root_width || w->a.y >= root_height)
			continue;

		if (!w->picture)
		{
			XRenderPictureAttributes	pa;
			XRenderPictFormat		*format;
			Drawable			draw = w->id;

#if HAS_NAME_WINDOW_PIXMAP
			if (hasNamePixmap && !w->pixmap)
				w->pixmap = XCompositeNameWindowPixmap (dpy, w->id);
			if (w->pixmap)
				draw = w->pixmap;
#endif
			format = sXRenderFindVisualFormat (dpy, w->a.visual);
			pa.subwindow_mode = IncludeInferiors;
			w->picture = XRenderCreatePicture (dpy, draw,
					format,
					CPSubwindowMode,
					&pa);
		}
#if DEBUG_REPAINT
		printf (" 0x%x", w->id);
#endif
		if (clipChanged)
		{
			if (w->borderSize)
			{
				set_ignore (dpy, NextRequest (dpy));
				XFixesDestroyRegion (dpy, w->borderSize);
				w->borderSize = None;
			}
			if (w->decoRegion)
			{
				set_ignore (dpy, NextRequest (dpy));
				XFixesDestroyRegion (dpy, w->decoRegion);
				w->decoRegion = None;
			}
			if (w->contentRegion)
			{
				set_ignore (dpy, NextRequest (dpy));
				XFixesDestroyRegion (dpy, w->contentRegion);
				w->contentRegion = None;
			}
			if (w->extents)
			{
				XFixesDestroyRegion (dpy, w->extents);
				w->extents = None;
			}
			if (w->borderClip)
			{
				XFixesDestroyRegion (dpy, w->borderClip);
				w->borderClip = None;
			}
		}
		if (!w->borderSize)
			w->borderSize = border_size (dpy, w);
		if (!w->extents)
			w->extents = win_extents (dpy, w);
		if ((w->mode == WINDOW_SOLID) || ((w->mode == WINDOW_TRANS) && w->decoHash))
		{
			int	x, y, wid, hei;
#if HAS_NAME_WINDOW_PIXMAP
			x = w->a.x;
			y = w->a.y;
			wid = w->a.width + w->a.border_width * 2;
			hei = w->a.height + w->a.border_width * 2;
#else
			x = w->a.x + w->a.border_width;
			y = w->a.y + w->a.border_width;
			wid = w->a.width;
			hei = w->a.height;
#endif
			XFixesSetPictureClipRegion (dpy, rootBuffer, 0, 0, region);
			set_ignore (dpy, NextRequest (dpy));
			/*XFixesSubtractRegion (dpy, region, region, w->borderSize);
			  set_ignore (dpy, NextRequest (dpy));*/
			if (w->mode == WINDOW_SOLID)
			{
				XFixesSubtractRegion (dpy, region, region, w->borderSize);
				set_ignore (dpy, NextRequest (dpy));
				XRenderComposite (dpy, PictOpSrc, w->picture, None, rootBuffer,
						0, 0, 0, 0, x, y, wid, hei);
            if (w->dimPicture)
               XRenderComposite (dpy, PictOpOver, w->dimPicture, None, rootBuffer, 0, 0, 0, 0, x, y, wid, hei);
			}
			else
         {
            if (!w->contentRegion)
               w->contentRegion = content_region (dpy, w);
            XFixesSubtractRegion (dpy, region, region, w->contentRegion);
            set_ignore (dpy, NextRequest (dpy));
            /*solid part*/
            XRenderComposite (dpy, PictOpSrc, w->picture, None, rootBuffer,
                              _LEFTWIDTH_(w->decoHash), _TOPHEIGHT_(w->decoHash), 0, 0,
                              x + _LEFTWIDTH_(w->decoHash),
                              y + _TOPHEIGHT_(w->decoHash),
                              wid - _LEFTWIDTH_(w->decoHash) - _RIGHTWIDTH_(w->decoHash),
                              hei - _TOPHEIGHT_(w->decoHash) - _BOTTOMHEIGHT_(w->decoHash));
         }
		}
		if (!w->borderClip)
		{
			w->borderClip = XFixesCreateRegion (dpy, 0, 0);
			XFixesCopyRegion (dpy, w->borderClip, region);
		}
		w->prev_trans = t;
		t = w;
	}
#if DEBUG_REPAINT
	printf ("\n");
	fflush (stdout);
#endif
	XFixesSetPictureClipRegion (dpy, rootBuffer, 0, 0, region);
	paint_root (dpy);
	for (w = t; w; w = w->prev_trans)
	{
		/*skip desktop */
		if (w->windowType == winDesktopAtom)
			continue;

		if (w->shadowSize > 0){
			switch (compMode) {
				case CompSimple:
					break;
				case CompServerShadows:
					/* dont' bother drawing shadows on desktop windows */
					if (w->windowType == winDesktopAtom)
					        break;
					XFixesSetPictureClipRegion (dpy, rootBuffer, 0, 0, w->borderClip);
					set_ignore (dpy, NextRequest (dpy));
					if (w->opacity != OPAQUE && !w->shadowPict)
						w->shadowPict = solid_picture (dpy, True,
								(double) w->opacity / OPAQUE * 0.3,
								0, 0, 0);
					XRenderComposite (dpy, PictOpOver, 
							w->shadowPict ? w->shadowPict : transBlackPicture,
							w->picture, rootBuffer,
							0, 0, 0, 0,
							w->a.x + w->shadow_dx,
							w->a.y + w->shadow_dy,
							w->shadow_width, w->shadow_height);
					break;
				case CompClientShadows:
					if (w->shadow && w->windowType != winDesktopAtom)
					{
						XFixesSetPictureClipRegion (dpy, rootBuffer, 0, 0, w->borderClip);
						XRenderComposite (dpy, PictOpOver, blackPicture, w->shadow, rootBuffer,
								0, 0, 0, 0,
								w->a.x + w->shadow_dx,
								w->a.y + w->shadow_dy,
								w->shadow_width, w->shadow_height);
					}
					break;
			}
		}
		if (w->opacity != OPAQUE && !w->alphaPict)
			w->alphaPict = solid_picture (dpy, False, 
					(double) w->opacity / OPAQUE, shadowColor.red, shadowColor.green, shadowColor.blue);
		if (w->mode == WINDOW_TRANS)
		{
			int	x, y, wid, hei;
			XFixesIntersectRegion (dpy, w->borderClip, w->borderClip, w->borderSize);
			XFixesSetPictureClipRegion (dpy, rootBuffer, 0, 0, w->borderClip);
#if HAS_NAME_WINDOW_PIXMAP
			x = w->a.x;
			y = w->a.y;
			wid = w->a.width + w->a.border_width * 2;
			hei = w->a.height + w->a.border_width * 2;
#else
			x = w->a.x + w->a.border_width;
			y = w->a.y + w->a.border_width;
			wid = w->a.width;
			hei = w->a.height;
#endif
			set_ignore (dpy, NextRequest (dpy));
			if (!w->decoHash)
			{
				XRenderComposite (dpy, PictOpOver, w->picture, w->alphaPict, rootBuffer,
						0, 0, 0, 0, x, y, wid, hei);
			}
			else
			{
						/*trans part*/
                  /* PICTURE ;)
                  |-----------------------------|
                  |             top             |
                  |-----------------------------|
                  |l |                       | r|
                  |e |                       | i|
                  |f |                       | g|
                  |t |                       | h|
                  |--------------------------| t|
                  |           bottom         |  |
                  |--------------------------|--|*/
                  /*top*/
   				XRenderComposite (dpy, PictOpOver, w->picture, w->alphaPict, rootBuffer,
   				                  0, 0, 0, 0, x, y, wid, _TOPHEIGHT_(w->decoHash));
                  /*right*/
   				XRenderComposite (dpy, PictOpOver, w->picture, w->alphaPict, rootBuffer,
   				                  wid - _RIGHTWIDTH_(w->decoHash), _TOPHEIGHT_(w->decoHash),
   				                  0, 0,
   				                  x + wid - _RIGHTWIDTH_(w->decoHash),
   				                  y + _TOPHEIGHT_(w->decoHash), _RIGHTWIDTH_(w->decoHash),
   				                  hei - _TOPHEIGHT_(w->decoHash));
                  /*bottom*/
   				XRenderComposite (dpy, PictOpOver, w->picture, w->alphaPict, rootBuffer,
   				                  0, hei - _BOTTOMHEIGHT_(w->decoHash), 0, 0,
   				                  x, y + hei - _BOTTOMHEIGHT_(w->decoHash),
   				                  wid - _RIGHTWIDTH_(w->decoHash), _BOTTOMHEIGHT_(w->decoHash));
                  /*left*/
   				XRenderComposite (dpy, PictOpOver, w->picture, w->alphaPict, rootBuffer,
   				                  0, _TOPHEIGHT_(w->decoHash), 0, 0,
   				                  x, y + _TOPHEIGHT_(w->decoHash),
   				                  _LEFTWIDTH_(w->decoHash), hei - _TOPHEIGHT_(w->decoHash) - _BOTTOMHEIGHT_(w->decoHash));
		   }
		}
		else if (w->mode == WINDOW_ARGB)
		{
			int	x, y, wid, hei;
			XFixesIntersectRegion (dpy, w->borderClip, w->borderClip, w->borderSize);
			XFixesSetPictureClipRegion (dpy, rootBuffer, 0, 0, w->borderClip);
#if HAS_NAME_WINDOW_PIXMAP
			x = w->a.x;
			y = w->a.y;
			wid = w->a.width + w->a.border_width * 2;
			hei = w->a.height + w->a.border_width * 2;
#else
			x = w->a.x + w->a.border_width;
			y = w->a.y + w->a.border_width;
			wid = w->a.width;
			hei = w->a.height;
#endif
			set_ignore (dpy, NextRequest (dpy));
			XRenderComposite (dpy, PictOpOver, w->picture, w->alphaPict, rootBuffer,
					0, 0, 0, 0, 
					x, y, wid, hei);
		}
		XFixesDestroyRegion (dpy, w->borderClip);
		w->borderClip = None;
	}
	XFixesDestroyRegion (dpy, region);
	if (rootBuffer != rootPicture)
	{
#if 0
		XTransform	t;
		t.matrix[0][0] = XDoubleToFixed (3.0 /*/ scale*/);
		t.matrix[0][1] = 0.0;
		t.matrix[0][2] = 0.0;

		t.matrix[1][0] = 0.0;
		t.matrix[1][1] = XDoubleToFixed (1.0 /*/ scale*/);
		t.matrix[1][2] = 0.0;

		t.matrix[2][0] = 0.0;
		t.matrix[2][1] = 0.0;
		t.matrix[2][2] = XDoubleToFixed (1.0);

		XRenderSetPictureTransform (dpy, rootBuffer, &t);
#endif
		XFixesSetPictureClipRegion (dpy, rootBuffer, 0, 0, None);
		XRenderComposite (dpy, PictOpSrc, rootBuffer, None, rootPicture,
				0, 0, 0, 0, 0, 0, root_width, root_height);
	}
	screen_damaged = False;
}

static void
add_damage (Display *dpy, XserverRegion damage)
{
	if (allDamage)
	{
		XFixesUnionRegion (dpy, allDamage, allDamage, damage);
		XFixesDestroyRegion (dpy, damage);
	}
	else
		allDamage = damage;
}

static void
repair_win (Display *dpy, win *w)
{
	XserverRegion   parts;

	if (!w->damaged)
	{
		parts = win_extents (dpy, w);
		set_ignore (dpy, NextRequest (dpy));
		XDamageSubtract (dpy, w->damage, None, None);
	}
	else
	{
		XserverRegion	o;
		parts = XFixesCreateRegion (dpy, 0, 0);
		set_ignore (dpy, NextRequest (dpy));
		XDamageSubtract (dpy, w->damage, None, parts);
		XFixesTranslateRegion (dpy, parts,
				w->a.x + w->a.border_width,
				w->a.y + w->a.border_width);
		if (compMode == CompServerShadows)
		{
			o = XFixesCreateRegion (dpy, 0, 0);
			XFixesCopyRegion (dpy, o, parts);
			XFixesTranslateRegion (dpy, o, w->shadow_dx, w->shadow_dy);
			XFixesUnionRegion (dpy, parts, parts, o);
			XFixesDestroyRegion (dpy, o);
		}
	}
	add_damage (dpy, parts);
	w->damaged = 1;
}

static unsigned int
get_opacity_prop(Display *dpy, win *w, unsigned int def);

static void
map_win (Display *dpy, Window id, unsigned long sequence, Bool fade)
{
	win		*w = find_win (dpy, id);
	Drawable	back;

	if (!w)
		return;
	w->a.map_state = IsViewable;

	/* This needs to be here or else we lose transparency messages */
	XSelectInput (dpy, id, PropertyChangeMask);

#if CAN_DO_USABLE
	w->damage_bounds.x = w->damage_bounds.y = 0;
	w->damage_bounds.width = w->damage_bounds.height = 0;
#endif
	w->damaged = 0;

	if ((fade && fadeWindows) || (fade && fadeMenuWindows && w->windowType == winMenuAtom))
		set_fade (dpy, w, 0, get_opacity_prop(dpy, w, OPAQUE)*1.0/OPAQUE, fade_in_step, 0, False, True, True, True);
}

static void
finish_unmap_win (Display *dpy, win *w)
{
	w->damaged = 0;
#if CAN_DO_USABLE
	w->usable = False;
#endif
	if (w->extents != None)
	{
		add_damage (dpy, w->extents);    /* destroys region */
		w->extents = None;
	}

#if HAS_NAME_WINDOW_PIXMAP
	if (w->pixmap)
	{
		XFreePixmap (dpy, w->pixmap);
		w->pixmap = None;
	}
#endif

	if (w->picture)
	{
		set_ignore (dpy, NextRequest (dpy));
		XRenderFreePicture (dpy, w->picture);
		w->picture = None;
	}

	/* don't care about properties anymore */
	set_ignore (dpy, NextRequest (dpy));
	XSelectInput(dpy, w->id, 0);

	if (w->borderSize)
	{
		set_ignore (dpy, NextRequest (dpy));
		XFixesDestroyRegion (dpy, w->borderSize);
		w->borderSize = None;
	}
        
        if (w->decoRegion)
        {
            set_ignore (dpy, NextRequest (dpy));
            XFixesDestroyRegion (dpy, w->decoRegion);
            w->decoRegion = None;
        }
        
        if (w->contentRegion)
        {
            set_ignore (dpy, NextRequest (dpy));
            XFixesDestroyRegion (dpy, w->contentRegion);
            w->contentRegion = None;
        }
	
        if (w->shadow)
	{
		XRenderFreePicture (dpy, w->shadow);
		w->shadow = None;
	}
	if (w->borderClip)
	{
		XFixesDestroyRegion (dpy, w->borderClip);
		w->borderClip = None;
	}

	clipChanged = True;
}

#if HAS_NAME_WINDOW_PIXMAP
static void
unmap_callback (Display *dpy, win *w, Bool gone)
{
	finish_unmap_win (dpy, w);
}
#endif

static void
unmap_win (Display *dpy, Window id, Bool fade)
{
	win *w = find_win (dpy, id);
	if (!w)
		return;
	w->a.map_state = IsUnmapped;
#if HAS_NAME_WINDOW_PIXMAP
	if ((w->pixmap && fade && fadeWindows) || (w->pixmap && fade && fadeMenuWindows && w->windowType == winMenuAtom))
                    set_fade (dpy, w, w->opacity*1.0/OPAQUE, 0.0, fade_out_step, unmap_callback, False, False, True, True);
	else
#endif
	finish_unmap_win (dpy, w);
}

/* Get the opacity prop from window
   not found: default
   otherwise the value
   */
	static unsigned int
get_opacity_prop(Display *dpy, win *w, unsigned int def)
{
	Atom actual;
	int format;
	unsigned long n, left;

	unsigned char *data;
	int result = XGetWindowProperty(dpy, w->id, opacityAtom, 0L, 1L, False, 
			XA_CARDINAL, &actual, &format, 
			&n, &left, &data);
	if (result == Success && data != NULL && format == 32 )
	{
		unsigned int i;
		i = *(long*)data;
		XFree( (void *) data);
		return i;
	}
	return def;
}

	static unsigned int
get_shadow_prop(Display *dpy, win *w)
{
	Atom actual;
	int format;
	unsigned long n, left;

	unsigned char *data = NULL;
	int result = XGetWindowProperty(dpy, w->id, shadowAtom, 0L, 1L, False, 
			XA_CARDINAL, &actual, &format, 
			&n, &left, &data);
	if (result == Success && data != NULL && format == 32 )
	{
		unsigned int i;
		i = *(long*)data;
		XFree( (void *) data);
		/*i added this for security reaons but limiting a value to 200% is somewhat indiscriminate
		  if (i > 200)
		  return 200;
		  else*/
		return i;
	}
	return 100;
}

	static unsigned int
get_shade_prop(Display *dpy, win *w)
{
	Atom actual;
	int format;
	unsigned long n, left;

	unsigned char *data = NULL;
	int result = XGetWindowProperty(dpy, w->id, shadeAtom, 0L, 1L, False, 
			XA_CARDINAL, &actual, &format, 
			&n, &left, &data);
	if (result == Success && data != NULL && format == 32 )
	{
		unsigned int i;
		i = *(long*)data;
		XFree( (void *) data);
		return i;
	}
	return 0;
}

	static Bool
get_shapable_prop(Display *dpy, win *w)
{
	Atom actual;
	int format;
	unsigned long n, left;

	unsigned char *data = NULL;
	int result = XGetWindowProperty(dpy, w->id, shapableAtom, 0L, 1L, False, 
			XA_CARDINAL, &actual, &format, 
			&n, &left, &data);
	if (result == Success && data != NULL && format == 32 )
	{
		unsigned int i;
		i = *(long*)data;
		XFree( (void *) data);
		return i==1;
	}
	return True; /*in general, the window should be shapable*/
}

static unsigned int
get_decoHash_prop(Display *dpy, win *w)
{
	Atom actual;
	int format;
	unsigned long n, left;

	unsigned char *data = NULL;
	int result = XGetWindowProperty(dpy, w->id, decoHashAtom, 0L, 1L, False, 
			XA_CARDINAL, &actual, &format, 
			&n, &left, &data);
	if (result == Success && data != NULL && format == 32 )
	{
		unsigned int i;
		i = *(long*)data;
		XFree( (void *) data);
		return i;
	}
	return 0; /*no titlebar*/
}

static unsigned int
get_dim_prop(Display *dpy, win *w)
{
    Atom actual;
    int format;
    unsigned long n, left;
    
    unsigned char *data = NULL;
    int result = XGetWindowProperty(dpy, w->id, dimAtom, 0L, 1L, False, 
                                    XA_CARDINAL, &actual, &format, 
                                    &n, &left, &data);
    if (result == Success && data != NULL)
    {
        unsigned int i;
        memcpy (&i, data, sizeof (unsigned int));
        XFree( (void *) data);
        if (i == 0) i = 1;
        return i;
    }
    return OPAQUE; /*in general, the window is not dimmed*/
}

static unsigned int
get_deskchange_prop(Display *dpy, Window id)
{
    Atom actual;
    int format;
    unsigned long n, left;
    
    unsigned char *data = NULL;
    int result = XGetWindowProperty(dpy, id, deskChangeAtom, 0L, 1L, False,
    XA_CARDINAL, &actual, &format,
    &n, &left, &data);
    if (result == Success && data != NULL)
    {
        unsigned int i;
        memcpy (&i, data, sizeof (unsigned int));
        XFree( (void *) data);
        if (i < 3)
            return i;
    }
    return 0; /*no valid change state*/
}

/* Get the opacity property from the window in a percent format
   not found: default
otherwise: the value
*/
	static double
get_opacity_percent(Display *dpy, win *w, double def)
{
	if (w && w->isInFade)
	{
		fade *f = find_fade(w);
		return f->finish;
	}
	else
	{
		unsigned int opacity = get_opacity_prop (dpy, w, (unsigned int)(OPAQUE*def));
		return opacity*1.0/OPAQUE;
	}
}
#if 0
static void
damage_tqshape(Display *dpy, win *w, XRectangle *tqshape_damage)
{
    set_ignore (dpy, NextRequest (dpy));
    XserverRegion region = XFixesCreateRegion (dpy, tqshape_damage, 1);
    set_ignore (dpy, NextRequest (dpy));
    XserverRegion tmpRegion;
    add_damage(dpy, region);
    win *i;
    XRectangle *rect;
    int n;
    for (i = w; i; i = i->next)
    {
        XFixesIntersectRegion (dpy, tmpRegion, region, w->extents);
        rect = XFixesFetchRegion (dpy, region, &n);
        free(rect);
        printf("%d\n",n);
        if (n != 1)
        {
            w->damage = True;
            XFixesSubtractRegion (dpy, region, region, w->extents);
        }
        else
            break;
    }
    set_ignore (dpy, NextRequest (dpy));
    XFixesDestroyRegion (dpy, tmpRegion);
    set_ignore (dpy, NextRequest (dpy));
    XFixesDestroyRegion (dpy, region);
}
#endif

/* determine mode for window all in one place.
   Future might check for menu flag and other cool things
   */

	static Atom
get_wintype_prop(Display * dpy, Window w)
{
	Atom actual;
	int format;
	unsigned long n, left;

	unsigned char *data;
	int result = XGetWindowProperty (dpy, w, winTypeAtom, 0L, 1L, False,
			XA_ATOM, &actual, &format,
			&n, &left, &data);

	if (result == Success && data != None && format == 32 )
	{
		Atom a;
		a = *(long*)data;
		XFree ( (void *) data);
		return a;
	}
	return winNormalAtom;
}

	static void
determine_mode(Display *dpy, win *w)
{
	int mode;
	XRenderPictFormat *format;
	unsigned int default_opacity;

	/* if trans prop == -1 fall back on  previous tests*/

	if (w->alphaPict)
	{
		XRenderFreePicture (dpy, w->alphaPict);
		w->alphaPict = None;
	}
	if (w->shadowPict)
	{
		XRenderFreePicture (dpy, w->shadowPict);
		w->shadowPict = None;
	}

	if (w->a.class == InputOnly)
	{
		format = 0;
	}
	else
	{
		format = XRenderFindVisualFormat (dpy, w->a.visual);
	}

        if (!disable_argb && format && format->type == PictTypeDirect && format->direct.alphaMask)
	{
		mode = WINDOW_ARGB;
	}
	else if (w->opacity != OPAQUE)
	{
		mode = WINDOW_TRANS;
	}
	else
	{
		mode = WINDOW_SOLID;
	}
	w->mode = mode;
	if (w->extents)
	{
		XserverRegion damage;
		damage = XFixesCreateRegion (dpy, 0, 0);
		XFixesCopyRegion (dpy, damage, w->extents);
		add_damage (dpy, damage);
	}
}

	static Atom
determine_wintype (Display *dpy, Window w)
{
	Window       root_return, parent_return;
	Window      *children = NULL;
	unsigned int nchildren, i;
	Atom         type;

	type = get_wintype_prop (dpy, w);
	if (type != winNormalAtom)
		return type;

	if (!XQueryTree (dpy, w, &root_return, &parent_return, &children,
				&nchildren))
	{
		/* XQueryTree failed. */
		if (children)
			XFree ((void *)children);
		return winNormalAtom;
	}

	for (i = 0;i < nchildren;i++)
	{
		type = determine_wintype (dpy, children[i]);
		if (type != winNormalAtom)
			return type;
	}

	if (children)
		XFree ((void *)children);

	return winNormalAtom;
}

	static void
add_win (Display *dpy, Window id, Window prev)
{
	win				*new = malloc (sizeof (win));
	win				**p;
        unsigned int			tmp;

	if (!new)
		return;
	if (prev)
	{
		for (p = &list; *p; p = &(*p)->next)
			if ((*p)->id == prev)
				break;
	}
	else
		p = &list;
	new->id = id;
	set_ignore (dpy, NextRequest (dpy));
	if (!XGetWindowAttributes (dpy, id, &new->a))
	{
		free (new);
		return;
	}
	new->damaged = 0;
#if CAN_DO_USABLE
	new->usable = False;
#endif
#if HAS_NAME_WINDOW_PIXMAP
	new->pixmap = None;
#endif
	new->picture = None;
	if (new->a.class == InputOnly)
	{
		new->damage_sequence = 0;
		new->damage = None;
	}
	else
	{
		new->damage_sequence = NextRequest (dpy);
		new->damage = XDamageCreate (dpy, id, XDamageReportNonEmpty);
	}
	new->isInFade = False;
	new->alphaPict = None;
	new->shadowPict = None;
	new->borderSize = None;
	new->extents = None;
	new->shadow = None;
	new->shadow_dx = 0;
	new->shadow_dy = 0;
	new->shadow_width = 0;
	new->shadow_height = 0;
	new->opacity = OPAQUE;
	new->shadowSize = 100;
	new->decoHash = 0;

	new->borderClip = None;
	new->prev_trans = 0;

	XShapeSelectInput( dpy, id, ShapeNotifyMask );

	/* moved mode setting to one place */
        new->opacity = get_opacity_prop (dpy, new, OPAQUE);
	new->shadowSize = get_shadow_prop (dpy, new);
	new->shapable = get_shapable_prop(dpy, new);
	new->decoHash = get_decoHash_prop(dpy, new);
	tmp = get_dim_prop(dpy, new);
        new->dimPicture = (tmp < OPAQUE) ? solid_picture (dpy, True, (double)tmp/OPAQUE, 0.1, 0.1, 0.1) : None;
	new->windowType = determine_wintype (dpy, new->id);
        determine_mode (dpy, new);

	new->next = *p;
	*p = new;
	if (new->a.map_state == IsViewable)
		map_win (dpy, id, new->damage_sequence - 1, True);
}

	void
restack_win (Display *dpy, win *w, Window new_above)
{
	Window  old_above;

	if (w->next)
		old_above = w->next->id;
	else
		old_above = None;
	if (old_above != new_above)
	{
		win **prev;

		/* unhook */
		for (prev = &list; *prev; prev = &(*prev)->next)
			if ((*prev) == w)
				break;
		*prev = w->next;

		/* rehook */
		for (prev = &list; *prev; prev = &(*prev)->next)
		{
			if ((*prev)->id == new_above)
				break;
		}
		w->next = *prev;
		*prev = w;
	}
}

	static void
configure_win (Display *dpy, XConfigureEvent *ce)
{
	win		    *w = find_win (dpy, ce->window);
	Window	    above;
	XserverRegion   damage = None;

	if (!w)
	{
		if (ce->window == root)
		{
			if (rootBuffer)
			{
				XRenderFreePicture (dpy, rootBuffer);
				rootBuffer = None;
			}
			root_width = ce->width;
			root_height = ce->height;
		}
		return;
	}
#if CAN_DO_USABLE
	if (w->usable)
#endif
	{
		damage = XFixesCreateRegion (dpy, 0, 0);
		if (w->extents != None)
                    XFixesCopyRegion (dpy, damage, w->extents);
	}
	w->a.x = ce->x;
	w->a.y = ce->y;
	if (w->a.width != ce->width || w->a.height != ce->height)
	{
#if HAS_NAME_WINDOW_PIXMAP
		if (w->pixmap)
		{
			XFreePixmap (dpy, w->pixmap);
			w->pixmap = None;
			if (w->picture)
			{
				XRenderFreePicture (dpy, w->picture);
				w->picture = None;
			}
		}
#endif
		if (w->shadow)
		{
			XRenderFreePicture (dpy, w->shadow);
			w->shadow = None;
		}
	}
	w->a.width = ce->width;
	w->a.height = ce->height;
	w->a.border_width = ce->border_width;
	w->a.override_redirect = ce->override_redirect;
        restack_win (dpy, w, ce->above);
	if (damage)
	{
		XserverRegion	extents = win_extents (dpy, w);
                XFixesUnionRegion (dpy, damage, damage, extents);
                XFixesDestroyRegion (dpy, extents);
		add_damage (dpy, damage);
	}
	clipChanged = True;
}

	static void
circulate_win (Display *dpy, XCirculateEvent *ce)
{
	win	    *w = find_win (dpy, ce->window);
	Window  new_above;

	if (!w)
		return;

	if (ce->place == PlaceOnTop)
		new_above = list->id;
	else
		new_above = None;
	restack_win (dpy, w, new_above);
	clipChanged = True;
}

	static void
finish_destroy_win (Display *dpy, Window id, Bool gone)
{
	win	**prev, *w;

	for (prev = &list; (w = *prev); prev = &w->next)
		if (w->id == id)
		{
			if (!gone)
				finish_unmap_win (dpy, w);
			*prev = w->next;
			if (w->picture)
			{
				set_ignore (dpy, NextRequest (dpy));
				XRenderFreePicture (dpy, w->picture);
				w->picture = None;
			}
			if (w->alphaPict)
			{
				XRenderFreePicture (dpy, w->alphaPict);
				w->alphaPict = None;
			}
			if (w->shadowPict)
			{
				XRenderFreePicture (dpy, w->shadowPict);
				w->shadowPict = None;
			}
			if (w->shadow)
			{
				XRenderFreePicture (dpy, w->shadow);
				w->shadow = None;
			}
			if (w->damage != None)
			{
				set_ignore (dpy, NextRequest (dpy));
				XDamageDestroy (dpy, w->damage);
				w->damage = None;
			}
			cleanup_fade (dpy, w);
			free (w);
			break;
		}
}

#if HAS_NAME_WINDOW_PIXMAP
static void
destroy_callback (Display *dpy, win *w, Bool gone)
{
	finish_destroy_win (dpy, w->id, gone);
}
#endif

static void
destroy_win (Display *dpy, Window id, Bool gone, Bool fade)
{
	win *w = find_win (dpy, id);
#if HAS_NAME_WINDOW_PIXMAP
	if ((w && w->pixmap && fade && fadeWindows) || (w && w->pixmap && fade && fadeWindows && w->windowType == winMenuAtom))
		set_fade (dpy, w, w->opacity*1.0/OPAQUE, 0.0, fade_out_step, destroy_callback, gone, False, True, True);
	else
#endif
	{
		finish_destroy_win (dpy, id, gone);
	}
}

/*
   static void
   dump_win (win *w)
   {
   printf ("\t%08lx: %d x %d + %d + %d (%d)\n", w->id,
   w->a.width, w->a.height, w->a.x, w->a.y, w->a.border_width);
   }


   static void
   dump_wins (void)
   {
   win	*w;

   printf ("windows:\n");
   for (w = list; w; w = w->next)
   dump_win (w);
   }
   */

	static void
damage_win (Display *dpy, XDamageNotifyEvent *de)
{
	win	*w = find_win (dpy, de->drawable);

	if (!w)
		return;
#if CAN_DO_USABLE
	if (!w->usable)
	{
		if (w->damage_bounds.width == 0 || w->damage_bounds.height == 0)
		{
			w->damage_bounds = de->area;
		}
		else
		{
			if (de->area.x < w->damage_bounds.x)
			{
				w->damage_bounds.width += (w->damage_bounds.x - de->area.x);
				w->damage_bounds.x = de->area.x;
			}
			if (de->area.y < w->damage_bounds.y)
			{
				w->damage_bounds.height += (w->damage_bounds.y - de->area.y);
				w->damage_bounds.y = de->area.y;
			}
			if (de->area.x + de->area.width > w->damage_bounds.x + w->damage_bounds.width)
				w->damage_bounds.width = de->area.x + de->area.width - w->damage_bounds.x;
			if (de->area.y + de->area.height > w->damage_bounds.y + w->damage_bounds.height)
				w->damage_bounds.height = de->area.y + de->area.height - w->damage_bounds.y;
		}
#if 0
		printf ("unusable damage %d, %d: %d x %d bounds %d, %d: %d x %d\n",
				de->area.x,
				de->area.y,
				de->area.width,
				de->area.height,
				w->damage_bounds.x,
				w->damage_bounds.y,
				w->damage_bounds.width,
				w->damage_bounds.height);
#endif
		if (w->damage_bounds.x <= 0 && 
				w->damage_bounds.y <= 0 &&
				w->a.width <= w->damage_bounds.x + w->damage_bounds.width &&
				w->a.height <= w->damage_bounds.y + w->damage_bounds.height)
		{
			clipChanged = True;
			if ((fadeWindows) || (fadeMenuWindows && w->windowType == winMenuAtom))
				set_fade (dpy, w, 0, get_opacity_percent (dpy, w, 1.0), fade_in_step, 0, False, True, True, False);
			w->usable = True;
		}
	}
	if (w->usable)
#endif
		repair_win (dpy, w);
}

static void
damage_screen (Display *dpy)
{
	XserverRegion region;
	XRectangle r;

	r.x = 0;
	r.y = 0;
	r.width = root_width;
	r.height = root_height;

	region = XFixesCreateRegion (dpy, &r, 1);
	add_damage (dpy, region);
	screen_damaged = True;
}

static int
error (Display *dpy, XErrorEvent *ev)
{
	int	    o;
	char    *name = 0;

	if (should_ignore (dpy, ev->serial))
		return 0;

	if (ev->request_code == composite_opcode &&
			ev->minor_code == X_CompositeRedirectSubwindows)
	{
		fprintf (stderr, "Another composite manager is already running\n");
		exit (1);
	}

	o = ev->error_code - xfixes_error;
	switch (o) {
		case BadRegion: name = "BadRegion";	break;
		default: break;
	}
	o = ev->error_code - damage_error;
	switch (o) {
		case BadDamage: name = "BadDamage";	break;
		default: break;
	}
	o = ev->error_code - render_error;
	switch (o) {
		case BadPictFormat: name ="BadPictFormat"; break;
		case BadPicture: name ="BadPicture"; break;
		case BadPictOp: name ="BadPictOp"; break;
		case BadGlyphSet: name ="BadGlyphSet"; break;
		case BadGlyph: name ="BadGlyph"; break;
		default: break;
	}

#ifndef NDEBUG
	fprintf (stderr,"error %d request %d minor %d serial %d\n",
			ev->error_code, ev->request_code, ev->minor_code, ev->serial);
#endif

	/*    abort ();	    this is just annoying to most people */
	return 0;
}

	static void
expose_root (Display *dpy, Window root, XRectangle *rects, int nrects)
{
	XserverRegion  region = XFixesCreateRegion (dpy, rects, nrects);

	add_damage (dpy, region);
}


	static int
ev_serial (XEvent *ev)
{
	if ((ev->type & 0x7f) != KeymapNotify)
		return ev->xany.serial;
	return NextRequest (ev->xany.display);
}


	static char *
ev_name (XEvent *ev)
{
	static char	buf[128];
	switch (ev->type & 0x7f) {
		case Expose:
			return "Expose";
		case MapNotify:
			return "Map";
		case UnmapNotify:
			return "Unmap";
		case ReparentNotify:
			return "Reparent";
		case CirculateNotify:
			return "Circulate";
		default:
			if (ev->type == damage_event + XDamageNotify)
				return "Damage";
			sprintf (buf, "Event %d", ev->type);
			return buf;
	}
}

	static Window
ev_window (XEvent *ev)
{
	switch (ev->type) {
		case Expose:
			return ev->xexpose.window;
		case MapNotify:
			return ev->xmap.window;
		case UnmapNotify:
			return ev->xunmap.window;
		case ReparentNotify:
			return ev->xreparent.window;
		case CirculateNotify:
			return ev->xcirculate.window;
		default:
			if (ev->type == damage_event + XDamageNotify){
				fprintf(stderr, "%d", ev->type);
				return ((XDamageNotifyEvent *) ev)->drawable;
			}
			return 0;
	}
}

void
setShadowColor(char *value){  /*format nach #xxxxxx (html) �ndern?*/
	unsigned int tmp;
	char **res = NULL;
	tmp = strtoul(value, res, 16);
	if( !value || strlen(value) < 6 || strlen(value) > 8 || (*(value+1) == 'x' && strlen(value) < 8) || res != NULL ){
		shadowColor.red = 0;
		shadowColor.green = 0;
		shadowColor.blue = 0;
		printf("wrong hexadecimal (use 0xXXXXXX or XXXXXX)! defaulting to black...\n");
		return;
	}
	shadowColor.blue = tmp&0xff;
	tmp >>= 8;
	shadowColor.green = tmp&0xff;
	tmp >>= 8;
	shadowColor.red = tmp&0xff;
}

typedef enum _option{
	Display_=0,
	Compmode,
	ExcludeDockShadows,
	FadeWindows,
	FadeTrans,
	AutoRedirect,
	Synchronize,
	ShadowColor,
	ShadowRadius,
	ShadowOpacity,
	ShadowOffsetX,
	ShadowOffsetY,
	FadeOutStep,
	FadeInStep,
	FadeDelta,
	DisableARGB,
	FadeMenuWindows,
	NUMBEROFOPTIONS
} Option;

const char *
options[NUMBEROFOPTIONS] = {
	"Display",              /*0*/
	"Compmode",             /*1*/
	"ExcludeDockShadows",   /*2*/
	"FadeWindows",          /*3*/
	"FadeTrans",            /*4*/
	"AutoRedirect",         /*5*/
	"Synchronize",          /*6*/
	"ShadowColor",          /*7*/
	"ShadowRadius",         /*8*/
	"ShadowOpacity",        /*9*/
	"ShadowOffsetX",        /*10*/
	"ShadowOffsetY",        /*11*/
	"FadeOutStep",          /*12*/
	"FadeInStep",           /*13*/
	"FadeDelta",            /*14*/
	"DisableARGB",          /*15*/
	"FadeMenuWindows",      /*16*/
	/*put your thingy in here...*/    
};

void
setValue(Option option, char *value ){
	switch(option){ /*please keep that upside-down, because this way adding a new option is easier (all in one view)*/

		case FadeDelta:
			fade_delta = atoi(value);
			if (fade_delta < 1)
				fade_delta = 10;
			break;
		case FadeInStep:
			fade_in_step = atof(value);
			if (fade_in_step <= 0)
				fade_in_step = 0.01;
			break;
		case FadeOutStep:
			fade_out_step = atof(value);
			if (fade_out_step <= 0)
				fade_out_step = 0.01;
			break;
		case ShadowOffsetY:
			shadowOffsetY = atoi(value);
			break;
		case ShadowOffsetX:
			shadowOffsetX = atoi(value);
			break;
		case ShadowOpacity:
			shadowOpacity = atof(value);
			break;
		case ShadowRadius:
			shadowRadius = atoi(value);
			break;                    
		case ShadowColor:
			setShadowColor(value);
			break;
		case Synchronize:
			synchronize = ( strcasecmp(value, "true") == 0 );
			break;
		case AutoRedirect:
			autoRedirect = ( strcasecmp(value, "true") == 0 );
			break;
		case FadeTrans:
			fadeTrans = ( strcasecmp(value, "true") == 0 );
			break;
		case FadeWindows:
			fadeWindows = ( strcasecmp(value, "true") == 0 );
			break;
		case FadeMenuWindows:
			fadeMenuWindows = ( strcasecmp(value, "true") == 0 );
			break;
		case ExcludeDockShadows:
			excludeDockShadows = ( strcasecmp(value, "true") == 0 );
			break;
		case Compmode:
			if( strcasecmp(value, "CompClientShadows") == 0 ){
				compMode = CompClientShadows;
			}
			else if( strcasecmp(value, "CompServerShadows") == 0 ){
				compMode = CompServerShadows;
			}
			else{
				compMode = CompSimple; /*default*/
			}
			break;
		case Display_:
                        break;
			display = strdup(value);
			break;
		case DisableARGB:
			disable_argb = ( strcasecmp(value, "true") == 0 );
			break;
		default:
			break;
	}
}

int
setParameter(char *line){
	char *name = strtok(line, "=");
	char *value = line+strlen(name)+1;
	Option i;
	for(i=Display_; i < NUMBEROFOPTIONS; i++){
		if( strcasecmp(name, *(options+i) ) == 0 ){
			setValue(i, value);
			name = value = NULL;
			return 1;
		}
	}
	printf("ignored unknown option: <%s>\n", name);
	name = value = NULL;
	return 0;
}

void
loadConfig(char *filename){
	FILE           *file = NULL;
	char            line[ 1024 ];
	size_t          length = 0;
	Bool            wasNull = False;
	Bool            section = False;

	if( filename == NULL ){
		const char *home = getenv("HOME");
		const char *configfile = "/.xcompmgrrc"; 
		int n = strlen(home)+strlen(configfile)+1;
		filename = (char*)malloc(n*sizeof(char));
		memset(filename,0,n);
		wasNull = True;

		strcat(filename, home);
		strcat(filename, configfile);
	}

	printf("trying '%s' as configfile\n\n", filename);

	if( (file = fopen(filename, "r")) == NULL ){
		printf("failed to open config file. does it exist?\n");
		if( wasNull ){
			free(filename);
			filename = NULL;
		}
		return;
	}

	/*find section*/
	while( !section && fgets(line, 1023, file) != NULL ){
		if( strcmp(line, "[xcompmgr]\n") == 0 )
			section = True;
	}
	/*read and set values*/
	while( section && fgets(line, 1023, file) != NULL ){
		int ret = strlen( line );
		if( ret > 1 ){
			if( *line == '[' )/*found new section - maybe check for '\n'?*/
				break;
			*(line+ret-1) = '\0';
			setParameter(line);
		}
	}
	printf("\nfinished parsing the config file\n");
	fclose(file);
	if( wasNull ){
		free(filename);
		filename = NULL;
	}
}

	void
usage (char *program)
{
	fprintf (stderr, "%s v1.0\n", program);
	fprintf (stderr, "usage: %s [options]\n", program);
	fprintf (stderr, "Options\n");
	fprintf (stderr, "   -d display\n      Specifies which display should be managed.\n");
	fprintf (stderr, "   -r radius\n      Specifies the blur radius for client-side shadows. (default 12)\n");
	fprintf (stderr, "   -o opacity\n      Specifies the translucency for client-side shadows. (default .75)\n");
	fprintf (stderr, "   -l left-offset\n      Specifies the left offset for client-side shadows. (default -15)\n");
	fprintf (stderr, "   -t top-offset\n      Specifies the top offset for clinet-side shadows. (default -15)\n");
	fprintf (stderr, "   -b color\n      Specifies the background color to use if no root pixmap is set. (default is a gray)\n");
	fprintf (stderr, "   -I fade-in-step\n      Specifies the opacity change between steps while fading in. (default 0.028)\n");
	fprintf (stderr, "   -O fade-out-step\n      Specifies the opacity change between steps while fading out. (default 0.03)\n");
	fprintf (stderr, "   -D fade-delta-time\n      Specifies the time between steps in a fade in milliseconds. (default 10)\n");
	fprintf (stderr, "   -a\n      Use automatic server-side compositing. Faster, but no special effects.\n");
	fprintf (stderr, "   -c\n      Draw client-side shadows with fuzzy edges.\n");
	fprintf (stderr, "   -C\n      Avoid drawing shadows on dock/panel windows.\n");
	fprintf (stderr, "   -f\n      Fade windows in/out when opening/closing.\n");
	fprintf (stderr, "   -F\n      Fade windows during opacity changes.\n");
	fprintf (stderr, "   -n\n      Normal client-side compositing with transparency support\n");
	fprintf (stderr, "   -s\n      Draw server-side shadows with sharp edges.\n");
	fprintf (stderr, "   -S\n      Enable synchronous operation (for debugging).\n");
	fprintf (stderr, "   -x [0x]XXXXXX\n      Choose Custom Color in hex format\n");
	fprintf (stderr, "   -v\n      Print version Number and exit\n");
	fprintf (stderr, "   -h\n      Print this help\n");
	exit (1);
}

static void
give_me_a_name(void)
{
  Window w;

  w = XCreateSimpleWindow (dpy, RootWindow(dpy, 0), 0, 0, 1, 1, 0, None,
		  None);
  Xutf8SetWMProperties(dpy, w, "kcompmgr", "kcompmgr", NULL, 0, NULL, NULL,
		  NULL);
}	

int
main (int argc, char **argv)
{
	XEvent	    ev;
	Window	    root_return, parent_return;
	Window	    *children;
	Pixmap	    transPixmap;
	Pixmap	    blackPixmap;
	unsigned int    nchildren;
	int		    i;
	XRenderPictureAttributes	pa;
	XRenderColor		c;
	XRectangle	    *expose_rects = 0;
	int		    size_expose = 0;
	int		    n_expose = 0;
	struct pollfd   ufd;
	int		    n;
	int		    last_update;
	int		    now;
	int		    p;
	int		    composite_major, composite_minor;

	int		    o;
	char		    *fill_color_name = NULL;
	char **res = NULL;

	shadowColor.red = 0;
	shadowColor.green = 0;
	shadowColor.blue = 0;

	loadConfig(NULL); /*we do that before cmdline-parsing, so config-values can be overridden*/
	/*used for shadow colors*/
	while ((o = getopt (argc, argv, "D:I:O:d:r:o:l:t:b:scnfFmCaSx:vh")) != -1)
	{
		switch (o) {
			case 'd':
				display = optarg;
				break;
			case 'D':
				fade_delta = atoi (optarg);
				if (fade_delta < 1)
					fade_delta = 10;
				break;
			case 'I':
				fade_in_step = atof (optarg);
				if (fade_in_step <= 0)
					fade_in_step = 0.01;
				break;
			case 'O':
				fade_out_step = atof (optarg);
				if (fade_out_step <= 0)
					fade_out_step = 0.01;
				break;
			case 's':
				compMode = CompServerShadows;
				break;
			case 'c':
				compMode = CompClientShadows;
				break;
			case 'C':
				excludeDockShadows = True;
				break;
			case 'n':
				compMode = CompSimple;
				break;
			case 'f':
				fadeWindows = True;
				break;
			case 'm':
				fadeMenuWindows = True;
				break;
			case 'F':
				fadeTrans = True;
				break;
			case 'a':
				autoRedirect = True;
				break;
			case 'S':
				synchronize = True;
				break;
			case 'r':
				shadowRadius = atoi (optarg);
				break;
			case 'o':
				shadowOpacity = atof (optarg);
				break;
			case 'l':
				shadowOffsetX = atoi (optarg);
				break;
			case 't':
				shadowOffsetY = atoi (optarg);
				break;
			case 'b':
				fill_color_name = optarg;
				break;
			case 'x':
				if( compMode != CompClientShadows ){
					fprintf(stderr, "sorry, but we need ClientShadows (-c) for coloring to work properly!\ndefaulting to black...\n");
					break;
				}
				setShadowColor(optarg);
				break;
			case 'v': fprintf (stderr, "%s v%-3.2f\n", argv[0], _VERSION_); exit (0);
			case 'h':
			default:
				  usage (argv[0]);
				  break;
		}
	}

	dpy = XOpenDisplay (display);
	if (!dpy)
	{
		fprintf (stderr, "Can't open display\n");
		exit (1);
	}
	XSetErrorHandler (error);
	if (synchronize)
		XSynchronize (dpy, 1);
	scr = DefaultScreen (dpy);
	root = RootWindow (dpy, scr);

	if (!XRenderQueryExtension (dpy, &render_event, &render_error))
	{
		fprintf (stderr, "No render extension\n");
		exit (1);
	}
	if (!XQueryExtension (dpy, COMPOSITE_NAME, &composite_opcode,
				&composite_event, &composite_error))
	{
		fprintf (stderr, "No composite extension\n");
		exit (1);
	}
	XCompositeQueryVersion (dpy, &composite_major, &composite_minor);
#if HAS_NAME_WINDOW_PIXMAP
	if (composite_major > 0 || composite_minor >= 2)
		hasNamePixmap = True;
#endif

	if (!XDamageQueryExtension (dpy, &damage_event, &damage_error))
	{
		fprintf (stderr, "No damage extension\n");
		exit (1);
	}
	if (!XFixesQueryExtension (dpy, &xfixes_event, &xfixes_error))
	{
		fprintf (stderr, "No XFixes extension\n");
		exit (1);
	}

	fprintf(stderr, "Started\n");

	give_me_a_name();

	/* get atoms */
	shadowAtom = XInternAtom (dpy, SHADOW_PROP, False);
	opacityAtom = XInternAtom (dpy, OPACITY_PROP, False);
	shadeAtom = XInternAtom (dpy, SHADE_PROP, False);
	shapableAtom = XInternAtom (dpy, SHAPABLE_PROP, False);
	decoHashAtom = XInternAtom (dpy, DECOHASH_PROP, False);
        dimAtom = XInternAtom (dpy, DIM_PROP, False);
        deskChangeAtom = XInternAtom (dpy, DESKCHANGE_PROP, False);
	winTypeAtom = XInternAtom (dpy, "_NET_WM_WINDOW_TYPE", False);
	winDesktopAtom = XInternAtom (dpy, "_NET_WM_WINDOW_TYPE_DESKTOP", False);
	winDockAtom = XInternAtom (dpy, "_NET_WM_WINDOW_TYPE_DOCK", False);
	winToolbarAtom = XInternAtom (dpy, "_NET_WM_WINDOW_TYPE_TOOLBAR", False);
	winMenuAtom = XInternAtom (dpy, "_NET_WM_WINDOW_TYPE_MENU", False);
	winUtilAtom = XInternAtom (dpy, "_NET_WM_WINDOW_TYPE_UTILITY", False);
	winSplashAtom = XInternAtom (dpy, "_NET_WM_WINDOW_TYPE_SPLASH", False);
	winDialogAtom = XInternAtom (dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
	winNormalAtom = XInternAtom (dpy, "_NET_WM_WINDOW_TYPE_NORMAL", False);

	pa.subwindow_mode = IncludeInferiors;

	if (compMode == CompClientShadows)
	{
		gaussianMap = make_gaussian_map(dpy, shadowRadius);
		presum_gaussian (gaussianMap);
	}

	if (fill_color_name)
	{
		XColor c;
		if (! XParseColor (dpy, DefaultColormap (dpy, scr),
			   fill_color_name, &c))
		{
			fprintf (stderr, "Could not parse fill color.\n");
			exit (1);
		}
		if (! XAllocColor (dpy, DefaultColormap (dpy, scr), &c))
		{
			fprintf (stderr, "Could not allocate color.\n");
			exit (1);
		}

		fill_color.red = c.red;
		fill_color.green = c.green;
		fill_color.blue = c.blue;
	}
	else
	{
		fill_color.red = fill_color.green = fill_color.blue = 0x8080;
	}
	fill_color.alpha = 0xffff;

	root_width = DisplayWidth (dpy, scr);
	root_height = DisplayHeight (dpy, scr);

	rootPicture = XRenderCreatePicture (dpy, root,
			sXRenderFindVisualFormat (dpy,
				DefaultVisual (dpy, scr)),
			CPSubwindowMode,
			&pa);
	blackPicture = solid_picture (dpy, True, 1, (double)(shadowColor.red)/0xff, (double)(shadowColor.green)/0xff, (double)(shadowColor.blue)/0xff);
	if (compMode == CompServerShadows)
		transBlackPicture = solid_picture (dpy, True, 0.3, 0, 0, 0);
	allDamage = None;
	clipChanged = True;
	XGrabServer (dpy);
	if (autoRedirect)
		XCompositeRedirectSubwindows (dpy, root, CompositeRedirectAutomatic);
	else
	{
        int dummy;
		XCompositeRedirectSubwindows (dpy, root, CompositeRedirectManual);
		XSelectInput (dpy, root,
				SubstructureNotifyMask|
				ExposureMask|
				StructureNotifyMask|
				PropertyChangeMask |
				VisibilityChangeMask);

		/*shaping stuff*/
		XShapeQueryExtension(dpy, &tqshapeEvent, &dummy);

		XQueryTree (dpy, root, &root_return, &parent_return, &children, &nchildren);
		for (i = 0; i < nchildren; i++)
			add_win (dpy, children[i], i ? children[i-1] : None);
		XFree (children);
	}
	XUngrabServer (dpy);
	ufd.fd = ConnectionNumber (dpy);
	ufd.events = POLLIN;
	if (!autoRedirect)
		paint_all (dpy, None);
	for (;;)
	{
		/*	dump_wins (); */
		do {
			if (autoRedirect)
				XFlush (dpy);
			if (!QLength (dpy))
			{
				if (poll (&ufd, 1, fade_timeout()) == 0)
				{
					run_fades (dpy);
					break;
				}
			}

			XNextEvent (dpy, &ev);
			if ((ev.type & 0x7f) != KeymapNotify)
				discard_ignore (dpy, ev.xany.serial);
#if DEBUG_EVENTS
			printf ("event %10.10s serial 0x%08x window 0x%08x\n",
					ev_name(&ev), ev_serial (&ev), ev_window (&ev));
#endif
			if (!autoRedirect) switch (ev.type) {
				case CreateNotify:
					add_win (dpy, ev.xcreatewindow.window, 0);
					break;
				case ConfigureNotify:
					configure_win (dpy, &ev.xconfigure);
					break;
				case DestroyNotify:
					destroy_win (dpy, ev.xdestroywindow.window, True, True);
					break;
				case MapNotify:
					map_win (dpy, ev.xmap.window, ev.xmap.serial, True);
					break;
				case UnmapNotify:
					unmap_win (dpy, ev.xunmap.window, True);
					break;
				case ReparentNotify:
					if (ev.xreparent.parent == root)
						add_win (dpy, ev.xreparent.window, 0);
					else
						destroy_win (dpy, ev.xreparent.window, False, True);
					break;
				case CirculateNotify:
					circulate_win (dpy, &ev.xcirculate);
					break;
				case Expose:
					if (ev.xexpose.window == root)
					{
						int more = ev.xexpose.count + 1;
						if (n_expose == size_expose)
						{
							if (expose_rects)
							{
								expose_rects = realloc (expose_rects, 
										(size_expose + more) * 
										sizeof (XRectangle));
								size_expose += more;
							}
							else
							{
								expose_rects = malloc (more * sizeof (XRectangle));
								size_expose = more;
							}
						}
						expose_rects[n_expose].x = ev.xexpose.x;
						expose_rects[n_expose].y = ev.xexpose.y;
						expose_rects[n_expose].width = ev.xexpose.width;
						expose_rects[n_expose].height = ev.xexpose.height;
						n_expose++;
						if (ev.xexpose.count == 0)
						{
							expose_root (dpy, root, expose_rects, n_expose);
							n_expose = 0;
						}
					}
					break;
				case PropertyNotify:
					for (p = 0; backgroundProps[p]; p++)
					{
						if (ev.xproperty.atom == XInternAtom (dpy, backgroundProps[p], False))
						{
							if (rootTile)
							{
								XRenderFreePicture (dpy, rootTile);
								rootTile = None;
								damage_screen (dpy);
								break;
							}
						}
					}
					/* Window set shade? */
					if (ev.xproperty.atom == shadeAtom)
					{
						win * w = find_win(dpy, ev.xproperty.window);
    					if (w){
    					           unsigned int tmp = get_shade_prop(dpy, w);
						if (tmp)
						{
							if (tmp == 1)
							{
								w->preShadeOpacity = w->opacity;
								w->opacity = w->opacity-1; /*assuming that no human being will ever be able to shade an invisable window ;) */
								determine_mode(dpy, w);
							}
							else if (tmp == 2)
							{
								w->opacity = w->preShadeOpacity;
								determine_mode(dpy, w);
							}
						}
						break;
    					}
					}
					else if (ev.xproperty.atom == shapableAtom)
					{
						win * w = find_win(dpy, ev.xproperty.window);
						if (w)
						{
							w->shapable = get_shapable_prop(dpy, w);
							/*			printf("%u is %s shapable\n",w->id,w->shapable?"":"not");*/
						}
						else
							printf("arrrg, window not found\n");
					}
					else if (ev.xproperty.atom == decoHashAtom)
					{
						win * w = find_win(dpy, ev.xproperty.window);
						if (w)
						{
							w->decoHash = get_decoHash_prop(dpy, w);
						}
						else
							printf("arrrg, window not found\n");
					}
                                        else if (ev.xproperty.atom == dimAtom)
                                        {
                                                win * w = find_win(dpy, ev.xproperty.window);
                                                if (w)
                                                {
                                                    unsigned int tmp = get_dim_prop(dpy, w);
                                                    if (w->dimPicture)
                                                    {
                                                        XRenderFreePicture (dpy, w->dimPicture);
                                                        w->dimPicture = None;
                                                    }
                                                    if (tmp < OPAQUE)
                                                        w->dimPicture = solid_picture (dpy, True, (double)tmp/OPAQUE, 0.1, 0.1, 0.1);
                                                }
                                                else
                                                printf("arrrg, window not found\n");
                                        }
					/* check if Trans or Shadow property was changed */    
					else if (ev.xproperty.atom == opacityAtom || ev.xproperty.atom == shadowAtom)
					{
						/* reset mode and redraw window */
						win * w = find_win(dpy, ev.xproperty.window);
						if (w)
						{
                                                    unsigned int tmp;
                                                    unsigned int oldShadowSize = w->shadowSize;
							if (ev.xproperty.atom == opacityAtom)
							{
								tmp = get_opacity_prop(dpy, w, OPAQUE);
   							/*THis will most probably happen if window is in fade - resulting in that the fade process isn't updated or broken -> we may have a wrong opacity in the future*/
   							/*if (tmp == w->opacity)
									break;*/ /*skip if opacity does not change*/
								if (fadeTrans)
								{
									static double start, finish, step;
									start = w->opacity*1.0/OPAQUE;
									finish = (tmp*1.0)/OPAQUE;
									
									if ( start > finish )
										step = fade_out_step;
									else
										step = fade_in_step;
									
								    set_fade (dpy, w, start, finish, step, 0, False, True, True, False);
                                    break;
                                    }
                                else
                                    w->opacity = tmp;
                                }
                            else
                                {
                                tmp = get_shadow_prop(dpy, w);
                                if (tmp == w->shadowSize)
                                    break; /*skip if shadow does not change*/
                                w->shadowSize = tmp;
/*                                if (w->isInFade)
                                    break;*/
                                }
                            if (w->shadow)
                            {
                                XRenderFreePicture (dpy, w->shadow);
                                w->shadow = None;
                            }
                            if (oldShadowSize < w->shadowSize) /* this is important to catch size changes on cleanup with determine_mode*/
                            {
                                if( w->extents != None )
                                    XFixesDestroyRegion( dpy, w->extents );
                                w->extents = win_extents (dpy, w);
                                determine_mode(dpy, w);
                            }
                            else
                            {
                                determine_mode(dpy, w);
                                if( w->extents != None )
                                    XFixesDestroyRegion( dpy, w->extents );
                                w->extents = win_extents (dpy, w);
                            }
		    }
		}
                else if (ev.xproperty.atom == deskChangeAtom)
                {
                    /*just set global variable*/
                    unsigned int tmp = get_deskchange_prop(dpy, ev.xproperty.window);
                    printf("desk change, state:%d\n",tmp);
                }
                break;
	    default:
		if (ev.type == damage_event + XDamageNotify)
                {
                    /*                     printf("damaging win: %u\n",ev.xany.window);*/
		    damage_win (dpy, (XDamageNotifyEvent *) &ev);
                }
                else if (ev.type == tqshapeEvent)
                {
                    win * w = find_win(dpy, ev.xany.window);
#if 1
                    if (w && w->shapable)
#endif
#if 0
                    if (w)
#endif
                    {
#if 0
                        XRectangle rect;
                        rect.x = ((XShapeEvent*)&ev)->x;
                        rect.y = ((XShapeEvent*)&ev)->y;
                        rect.width = ((XShapeEvent*)&ev)->width;
                        rect.height = ((XShapeEvent*)&ev)->height;
                        damage_tqshape(dpy, w, &rect);
#endif
#if 0
			if (w->shadowSize != 0)
			{
			    w->shadowSize = 0;
			    XRenderFreePicture (dpy, w->shadow);
                            w->shadow = None;
			    determine_mode(dpy, w);
                            if( w->extents != None )
                                XFixesDestroyRegion( dpy, w->extents );
                            w->extents = win_extents (dpy, w);
			}
#endif
                        /*this is hardly efficient, but a current workaraound
                        shaping support isn't that good so far (e.g. we lack tqshaped shadows)
                        IDEA: use XRender to scale/shift a copy of the window and then blur it*/
#if 1
                        if (w->picture)
                        {
                        clipChanged = True;
                        repair_win (dpy, w);
                        }
#endif
                    }
                }
		break;
	    }
	} while (QLength (dpy));
	if (allDamage && !autoRedirect)
	{
	    paint_all (dpy, allDamage);
            XSync (dpy, False);
	    allDamage = None;
	    clipChanged = False;
	}
    }

    XClearArea (dpy, root, 0, 0, 0, 0, True);
    XSync (dpy, False);
}