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 4-bit pixels, stored in 2 32-bit words
49 * containing
50 * - 16 4-bit chunky pixels on input
51 * - permutated planar data (2 planes per 32-bit word) on output
52 */
53
c2p_16x4(CARD32 d[2])54 static void c2p_16x4(CARD32 d[2])
55 {
56 transp2(d, 8);
57 transp2(d, 2);
58 transp2x(d, 1);
59 transp2(d, 16);
60 transp2(d, 4);
61 transp2(d, 1);
62 }
63
64
65 /*
66 * Store a full block of iplan2p4 data after c2p conversion
67 */
68
store_iplan2p4(void * dst,const CARD32 d[2])69 static inline void store_iplan2p4(void *dst, const CARD32 d[2])
70 {
71 CARD32 *p = dst;
72
73 *p++ = d[0];
74 *p++ = d[1];
75 }
76
77
78 void
shadowUpdateIplan2p4(ScreenPtr pScreen,shadowBufPtr pBuf)79 shadowUpdateIplan2p4(ScreenPtr pScreen, shadowBufPtr pBuf)
80 {
81 RegionPtr damage = DamageRegion(pBuf->pDamage);
82 PixmapPtr pShadow = pBuf->pPixmap;
83 int nbox = RegionNumRects(damage);
84 BoxPtr pbox = RegionRects(damage);
85 FbBits *shaBase;
86 CARD16 *shaLine, *sha;
87 FbStride shaStride;
88 int scrLine;
89 _X_UNUSED int shaBpp, shaXoff, shaYoff;
90 int x, y, w, h;
91 int i, n;
92 CARD16 *win;
93 _X_UNUSED CARD32 winSize;
94 union {
95 CARD8 bytes[8];
96 CARD32 words[2];
97 } d;
98
99 fbGetDrawable(&pShadow->drawable, shaBase, shaStride, shaBpp, shaXoff,
100 shaYoff);
101 shaStride *= sizeof(FbBits) / sizeof(CARD16);
102
103 while (nbox--) {
104 x = pbox->x1;
105 y = pbox->y1;
106 w = pbox->x2 - pbox->x1;
107 h = pbox->y2 - pbox->y1;
108
109 scrLine = (x & -16) / 2;
110 shaLine = (CARD16 *)shaBase + y * shaStride + scrLine / sizeof(CARD16);
111
112 n = ((x & 15) + w + 15) / 16; /* number of c2p units in scanline */
113
114 while (h--) {
115 sha = shaLine;
116 win = (CARD16 *) (*pBuf->window) (pScreen,
117 y,
118 scrLine,
119 SHADOW_WINDOW_WRITE,
120 &winSize,
121 pBuf->closure);
122 if (!win)
123 return;
124 for (i = 0; i < n; i++) {
125 memcpy(d.bytes, sha, sizeof(d.bytes));
126 c2p_16x4(d.words);
127 store_iplan2p4(win, d.words);
128 sha += sizeof(d.bytes) / sizeof(*sha);
129 win += sizeof(d.bytes) / sizeof(*win);
130 }
131 shaLine += shaStride;
132 y++;
133 }
134 pbox++;
135 }
136 }
137