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a09e091a JB |
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 | ||
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 | ||
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 | |
81 | shadowUpdateAfb4(ScreenPtr pScreen, shadowBufPtr pBuf) | |
82 | { | |
83 | RegionPtr damage = shadowDamage(pBuf); | |
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 | } |