1 /*
2 * tableinitcmtemplate.c - template for initialising lookup tables for
3 * translation from a colour map to true colour.
4 *
5 * This file shouldn't be compiled. It is included multiple times by
6 * translate.c, each time with a different definition of the macro OUT.
7 * For each value of OUT, this file defines a function which allocates an
8 * appropriately sized lookup table and initialises it.
9 *
10 * I know this code isn't nice to read because of all the macros, but
11 * efficiency is important here.
12 */
13
14 /*
15 * OSXvnc Copyright (C) 2001 Dan McGuirk <mcguirk@incompleteness.net>.
16 * Original Xvnc code Copyright (C) 1999 AT&T Laboratories Cambridge.
17 * All Rights Reserved.
18 *
19 * This is free software; you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License as published by
21 * the Free Software Foundation; either version 2 of the License, or
22 * (at your option) any later version.
23 *
24 * This software is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with this software; if not, write to the Free Software
31 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
32 * USA.
33 */
34
35 #if !defined(OUT)
36 #error "This file shouldn't be compiled."
37 #error "It is included as part of translate.c"
38 #endif
39
40 #define OUT_T CONCAT3E(uint,OUT,_t)
41 #define SwapOUT(x) CONCAT2E(Swap,OUT(x))
42 #define rfbInitColourMapSingleTableOUT \
43 CONCAT2E(rfbInitColourMapSingleTable,OUT)
44
45 static void
rfbInitColourMapSingleTableOUT(char ** table,rfbPixelFormat * in,rfbPixelFormat * out,rfbColourMap * colourMap)46 rfbInitColourMapSingleTableOUT(char **table, rfbPixelFormat *in,
47 rfbPixelFormat *out,rfbColourMap* colourMap)
48 {
49 uint32_t i, r, g, b;
50 OUT_T *t;
51 uint32_t nEntries = 1 << in->bitsPerPixel;
52 int shift = colourMap->is16?16:8;
53
54 if (*table) free(*table);
55 *table = (char *)malloc(nEntries * sizeof(OUT_T));
56 t = (OUT_T *)*table;
57
58 for (i = 0; i < nEntries; i++) {
59 r = g = b = 0;
60 if(i < colourMap->count) {
61 if(colourMap->is16) {
62 r = colourMap->data.shorts[3*i+0];
63 g = colourMap->data.shorts[3*i+1];
64 b = colourMap->data.shorts[3*i+2];
65 } else {
66 r = colourMap->data.bytes[3*i+0];
67 g = colourMap->data.bytes[3*i+1];
68 b = colourMap->data.bytes[3*i+2];
69 }
70 }
71 t[i] = ((((r * (1 + out->redMax)) >> shift) << out->redShift) |
72 (((g * (1 + out->greenMax)) >> shift) << out->greenShift) |
73 (((b * (1 + out->blueMax)) >> shift) << out->blueShift));
74 #if (OUT != 8)
75 if (out->bigEndian != in->bigEndian) {
76 t[i] = SwapOUT(t[i]);
77 }
78 #endif
79 }
80 }
81
82 #undef OUT_T
83 #undef SwapOUT
84 #undef rfbInitColourMapSingleTableOUT
85