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
43 void
shadowUpdatePacked(ScreenPtr pScreen,shadowBufPtr pBuf)44 shadowUpdatePacked(ScreenPtr pScreen, shadowBufPtr pBuf)
45 {
46 RegionPtr damage = DamageRegion(pBuf->pDamage);
47 PixmapPtr pShadow = pBuf->pPixmap;
48 int nbox = RegionNumRects(damage);
49 BoxPtr pbox = RegionRects(damage);
50 FbBits *shaBase, *shaLine, *sha;
51 FbStride shaStride;
52 int scrBase, scrLine, scr;
53 int shaBpp;
54 _X_UNUSED int shaXoff, shaYoff;
55 int x, y, w, h, width;
56 int i;
57 FbBits *winBase = NULL, *win;
58 CARD32 winSize;
59
60 fbGetDrawable(&pShadow->drawable, shaBase, shaStride, shaBpp, shaXoff,
61 shaYoff);
62 while (nbox--) {
63 x = pbox->x1 * shaBpp;
64 y = pbox->y1;
65 w = (pbox->x2 - pbox->x1) * shaBpp;
66 h = pbox->y2 - pbox->y1;
67
68 scrLine = (x >> FB_SHIFT);
69 shaLine = shaBase + y * shaStride + (x >> FB_SHIFT);
70
71 x &= FB_MASK;
72 w = (w + x + FB_MASK) >> FB_SHIFT;
73
74 while (h--) {
75 winSize = 0;
76 scrBase = 0;
77 width = w;
78 scr = scrLine;
79 sha = shaLine;
80 while (width) {
81 /* how much remains in this window */
82 i = scrBase + winSize - scr;
83 if (i <= 0 || scr < scrBase) {
84 winBase = (FbBits *) (*pBuf->window) (pScreen,
85 y,
86 scr * sizeof(FbBits),
87 SHADOW_WINDOW_WRITE,
88 &winSize,
89 pBuf->closure);
90 if (!winBase)
91 return;
92 scrBase = scr;
93 winSize /= sizeof(FbBits);
94 i = winSize;
95 }
96 win = winBase + (scr - scrBase);
97 if (i > width)
98 i = width;
99 width -= i;
100 scr += i;
101 memcpy(win, sha, i * sizeof(FbBits));
102 sha += i;
103 }
104 shaLine += shaStride;
105 y++;
106 }
107 pbox++;
108 }
109 }
110