1 /*
2 * Copyright © 2013 Geert Uytterhoeven
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Based on shpacked.c, which is Copyright © 2000 Keith Packard
24 */
25
26 #ifdef HAVE_DIX_CONFIG_H
27 #include <dix-config.h>
28 #endif
29
30 #include <stdlib.h>
31
32 #include <X11/X.h>
33 #include "scrnintstr.h"
34 #include "windowstr.h"
35 #include <X11/fonts/font.h>
36 #include "dixfontstr.h"
37 #include <X11/fonts/fontstruct.h>
38 #include "mi.h"
39 #include "regionstr.h"
40 #include "globals.h"
41 #include "gcstruct.h"
42 #include "shadow.h"
43 #include "fb.h"
44 #include "c2p_core.h"
45
46
47 /*
48 * Perform a full C2P step on 16 8-bit pixels, stored in 4 32-bit words
49 * containing
50 * - 16 8-bit chunky pixels on input
51 * - permutated planar data (2 planes per 32-bit word) on output
52 */
53
c2p_16x8(CARD32 d[4])54 static void c2p_16x8(CARD32 d[4])
55 {
56 transp4(d, 8, 2);
57 transp4(d, 1, 2);
58 transp4x(d, 16, 2);
59 transp4x(d, 2, 2);
60 transp4(d, 4, 1);
61 }
62
63
64 /*
65 * Store a full block of permutated iplan2p8 data after c2p conversion
66 */
67
store_iplan2p8(void * dst,const CARD32 d[4])68 static inline void store_iplan2p8(void *dst, const CARD32 d[4])
69 {
70 CARD32 *p = dst;
71
72 *p++ = d[1];
73 *p++ = d[3];
74 *p++ = d[0];
75 *p++ = d[2];
76 }
77
78
79 void
shadowUpdateIplan2p8(ScreenPtr pScreen,shadowBufPtr pBuf)80 shadowUpdateIplan2p8(ScreenPtr pScreen, shadowBufPtr pBuf)
81 {
82 RegionPtr damage = DamageRegion(pBuf->pDamage);
83 PixmapPtr pShadow = pBuf->pPixmap;
84 int nbox = RegionNumRects(damage);
85 BoxPtr pbox = RegionRects(damage);
86 FbBits *shaBase;
87 CARD16 *shaLine, *sha;
88 FbStride shaStride;
89 int scrLine;
90 _X_UNUSED int shaBpp, shaXoff, shaYoff;
91 int x, y, w, h;
92 int i, n;
93 CARD16 *win;
94 _X_UNUSED CARD32 winSize;
95 union {
96 CARD8 bytes[16];
97 CARD32 words[4];
98 } d;
99
100 fbGetDrawable(&pShadow->drawable, shaBase, shaStride, shaBpp, shaXoff,
101 shaYoff);
102 shaStride *= sizeof(FbBits) / sizeof(CARD16);
103
104 while (nbox--) {
105 x = pbox->x1;
106 y = pbox->y1;
107 w = pbox->x2 - pbox->x1;
108 h = pbox->y2 - pbox->y1;
109
110 scrLine = x & -16;
111 shaLine = (CARD16 *)shaBase + y * shaStride + scrLine / sizeof(CARD16);
112
113 n = ((x & 15) + w + 15) / 16; /* number of c2p units in scanline */
114
115 while (h--) {
116 sha = shaLine;
117 win = (CARD16 *) (*pBuf->window) (pScreen,
118 y,
119 scrLine,
120 SHADOW_WINDOW_WRITE,
121 &winSize,
122 pBuf->closure);
123 if (!win)
124 return;
125 for (i = 0; i < n; i++) {
126 memcpy(d.bytes, sha, sizeof(d.bytes));
127 c2p_16x8(d.words);
128 store_iplan2p8(win, d.words);
129 sha += sizeof(d.bytes) / sizeof(*sha);
130 win += sizeof(d.bytes) / sizeof(*win);
131 }
132 shaLine += shaStride;
133 y++;
134 }
135 pbox++;
136 }
137 }
138