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 32 4-bit pixels, stored in 4 32-bit words
49 * containing
50 * - 32 4-bit chunky pixels on input
51 * - permutated planar data (1 plane per 32-bit word) on output
52 */
53
c2p_32x4(CARD32 d[4])54 static void c2p_32x4(CARD32 d[4])
55 {
56 transp4(d, 16, 2);
57 transp4(d, 8, 1);
58 transp4(d, 4, 2);
59 transp4(d, 2, 1);
60 transp4(d, 1, 2);
61 }
62
63
64 /*
65 * Store a full block of permutated planar data after c2p conversion
66 */
67
store_afb4(void * dst,unsigned int stride,const CARD32 d[4])68 static inline void store_afb4(void *dst, unsigned int stride,
69 const CARD32 d[4])
70 {
71 CARD8 *p = dst;
72
73 *(CARD32 *)p = d[3]; p += stride;
74 *(CARD32 *)p = d[1]; p += stride;
75 *(CARD32 *)p = d[2]; p += stride;
76 *(CARD32 *)p = d[0]; p += stride;
77 }
78
79
80 void
shadowUpdateAfb4(ScreenPtr pScreen,shadowBufPtr pBuf)81 shadowUpdateAfb4(ScreenPtr pScreen, shadowBufPtr pBuf)
82 {
83 RegionPtr damage = DamageRegion(pBuf->pDamage);
84 PixmapPtr pShadow = pBuf->pPixmap;
85 int nbox = RegionNumRects(damage);
86 BoxPtr pbox = RegionRects(damage);
87 FbBits *shaBase;
88 CARD32 *shaLine, *sha;
89 FbStride shaStride;
90 int scrLine;
91 _X_UNUSED int shaBpp, shaXoff, shaYoff;
92 int x, y, w, h;
93 int i, n;
94 CARD32 *win;
95 CARD32 off, winStride;
96 union {
97 CARD8 bytes[16];
98 CARD32 words[4];
99 } d;
100
101 fbGetDrawable(&pShadow->drawable, shaBase, shaStride, shaBpp, shaXoff,
102 shaYoff);
103 if (sizeof(FbBits) != sizeof(CARD32))
104 shaStride = shaStride * sizeof(FbBits) / sizeof(CARD32);
105
106 while (nbox--) {
107 x = pbox->x1;
108 y = pbox->y1;
109 w = pbox->x2 - pbox->x1;
110 h = pbox->y2 - pbox->y1;
111
112 scrLine = (x & -32) / 2;
113 shaLine = (CARD32 *)shaBase + y * shaStride + scrLine / sizeof(CARD32);
114
115 off = scrLine / 4; /* byte offset in bitplane scanline */
116 n = ((x & 31) + w + 31) / 32; /* number of c2p units in scanline */
117
118 while (h--) {
119 sha = shaLine;
120 win = (CARD32 *) (*pBuf->window) (pScreen,
121 y,
122 off,
123 SHADOW_WINDOW_WRITE,
124 &winStride,
125 pBuf->closure);
126 if (!win)
127 return;
128 for (i = 0; i < n; i++) {
129 memcpy(d.bytes, sha, sizeof(d.bytes));
130 c2p_32x4(d.words);
131 store_afb4(win++, winStride, d.words);
132 sha += sizeof(d.bytes) / sizeof(*sha);
133 }
134 shaLine += shaStride;
135 y++;
136 }
137 pbox++;
138 }
139 }
140