1 /*
2
3 Copyright (C) 1991-2001 and beyond by Bungie Studios, Inc.
4 and the "Aleph One" developers.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 This license is contained in the file "COPYING",
17 which is included with this source code; it is available online at
18 http://www.gnu.org/licenses/gpl.html
19
20 */
21 /*
22 * cscluts_sdl.cpp - CLUT handling, SDL implementation
23 *
24 * Written in 2000 by Christian Bauer
25 */
26
27 #include "cseries.h"
28 #include "FileHandler.h"
29 #include "SDL_endian.h"
30
31
32 // Global variables
33 RGBColor rgb_black = {0x0000, 0x0000, 0x0000};
34 RGBColor rgb_white = {0xffff, 0xffff, 0xffff};
35
36 RGBColor system_colors[NUM_SYSTEM_COLORS] =
37 {
38 {0x2666, 0x2666, 0x2666},
39 {0xd999, 0xd999, 0xd999}
40 };
41
42
43 /*
44 * Convert Mac CLUT resource to color_table
45 */
46
build_color_table(color_table * table,LoadedResource & clut)47 void build_color_table(color_table *table, LoadedResource &clut)
48 {
49 // Open stream to CLUT resource
50 SDL_RWops *p = SDL_RWFromMem(clut.GetPointer(), (int)clut.GetLength());
51 assert(p);
52
53 // Check number of colors
54 SDL_RWseek(p, 6, SEEK_CUR);
55 int n = SDL_ReadBE16(p) + 1;
56 // SDL_ReadBE16 returns a Uint16 and thus can never be negative. At least,
57 // that is what it seems.
58 // TODO Eliminate the n < 0 check as it will always evaluate to false
59 if (n < 0)
60 n = 0;
61 else if (n > 256)
62 n = 256;
63 table->color_count = n;
64
65 // Convert color data
66 rgb_color *dst = table->colors;
67 for (int i=0; i<n; i++) {
68 SDL_RWseek(p, 2, SEEK_CUR);
69 dst->red = SDL_ReadBE16(p);
70 dst->green = SDL_ReadBE16(p);
71 dst->blue = SDL_ReadBE16(p);
72 dst++;
73 }
74
75 // Close stream
76 SDL_RWclose(p);
77 }
78