shpacked.c revision 05b261ec 
1/*
2 *
3 * Copyright © 2000 Keith Packard
4 *
5 * Permission to use, copy, modify, distribute, and sell this software and its
6 * documentation for any purpose is hereby granted without fee, provided that
7 * the above copyright notice appear in all copies and that both that
8 * copyright notice and this permission notice appear in supporting
9 * documentation, and that the name of Keith Packard not be used in
10 * advertising or publicity pertaining to distribution of the software without
11 * specific, written prior permission.  Keith Packard makes no
12 * representations about the suitability of this software for any purpose.  It
13 * is provided "as is" without express or implied warranty.
14 *
15 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
17 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
18 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
19 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
20 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
21 * PERFORMANCE OF THIS SOFTWARE.
22 */
23
24#ifdef HAVE_DIX_CONFIG_H
25#include <dix-config.h>
26#endif
27
28#include <stdlib.h>
29
30#include    <X11/X.h>
31#include    "scrnintstr.h"
32#include    "windowstr.h"
33#include    <X11/fonts/font.h>
34#include    "dixfontstr.h"
35#include    <X11/fonts/fontstruct.h>
36#include    "mi.h"
37#include    "regionstr.h"
38#include    "globals.h"
39#include    "gcstruct.h"
40#include    "shadow.h"
41#include    "fb.h"
42
43void
44shadowUpdatePacked (ScreenPtr	    pScreen,
45		    shadowBufPtr    pBuf)
46{
47    RegionPtr	damage = shadowDamage (pBuf);
48    PixmapPtr	pShadow = pBuf->pPixmap;
49    int		nbox = REGION_NUM_RECTS (damage);
50    BoxPtr	pbox = REGION_RECTS (damage);
51    FbBits	*shaBase, *shaLine, *sha;
52    FbStride	shaStride;
53    int		scrBase, scrLine, scr;
54    int		shaBpp;
55    int		shaXoff, shaYoff; /* XXX assumed to be zero */
56    int		x, y, w, h, width;
57    int         i;
58    FbBits	*winBase = NULL, *win;
59    CARD32      winSize;
60
61    fbGetDrawable (&pShadow->drawable, shaBase, shaStride, shaBpp, shaXoff, shaYoff);
62    while (nbox--)
63    {
64	x = pbox->x1 * shaBpp;
65	y = pbox->y1;
66	w = (pbox->x2 - pbox->x1) * shaBpp;
67	h = pbox->y2 - pbox->y1;
68
69	scrLine = (x >> FB_SHIFT);
70	shaLine = shaBase + y * shaStride + (x >> FB_SHIFT);
71
72	x &= FB_MASK;
73	w = (w + x + FB_MASK) >> FB_SHIFT;
74
75	while (h--)
76	{
77	    winSize = 0;
78	    scrBase = 0;
79	    width = w;
80	    scr = scrLine;
81	    sha = shaLine;
82	    while (width) {
83		/* how much remains in this window */
84		i = scrBase + winSize - scr;
85		if (i <= 0 || scr < scrBase)
86		{
87		    winBase = (FbBits *) (*pBuf->window) (pScreen,
88							  y,
89							  scr * sizeof (FbBits),
90							  SHADOW_WINDOW_WRITE,
91							  &winSize,
92							  pBuf->closure);
93		    if(!winBase)
94			return;
95		    scrBase = scr;
96		    winSize /= sizeof (FbBits);
97		    i = winSize;
98		}
99		win = winBase + (scr - scrBase);
100		if (i > width)
101		    i = width;
102		width -= i;
103		scr += i;
104#define PickBit(a,i)	(((a) >> (i)) & 1)
105		while (i--)
106		    *win++ = *sha++;
107	    }
108	    shaLine += shaStride;
109	    y++;
110	}
111	pbox++;
112    }
113}
114
115shadowUpdateProc shadowUpdatePackedWeak(void) { return shadowUpdatePacked; }
116