forked from bunder/qpakman
/
im_color.cc
483 lines (408 loc) · 18.7 KB
/
im_color.cc
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//------------------------------------------------------------------------
// Color Management
//------------------------------------------------------------------------
//
// Copyright (c) 2008 Andrew J Apted
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
//------------------------------------------------------------------------
#include "headers.h"
#include "main.h"
#include <map>
#include "im_color.h"
#include "im_image.h"
#define MAX_COLOR_CACHE 1024
static std::map<u32_t, byte> color_cache;
static byte palette[256*3];
static bool allow_fullbright = false;
static byte transparent_color = 0;
const byte quake1_palette[256*3] =
{
0, 0, 0, 15, 15, 15, 31, 31, 31, 47, 47, 47, 63, 63, 63,
75, 75, 75, 91, 91, 91, 107,107,107, 123,123,123, 139,139,139,
155,155,155, 171,171,171, 187,187,187, 203,203,203, 219,219,219,
235,235,235, 15, 11, 7, 23, 15, 11, 31, 23, 11, 39, 27, 15,
47, 35, 19, 55, 43, 23, 63, 47, 23, 75, 55, 27, 83, 59, 27,
91, 67, 31, 99, 75, 31, 107, 83, 31, 115, 87, 31, 123, 95, 35,
131,103, 35, 143,111, 35, 11, 11, 15, 19, 19, 27, 27, 27, 39,
39, 39, 51, 47, 47, 63, 55, 55, 75, 63, 63, 87, 71, 71,103,
79, 79,115, 91, 91,127, 99, 99,139, 107,107,151, 115,115,163,
123,123,175, 131,131,187, 139,139,203, 0, 0, 0, 7, 7, 0,
11, 11, 0, 19, 19, 0, 27, 27, 0, 35, 35, 0, 43, 43, 7,
47, 47, 7, 55, 55, 7, 63, 63, 7, 71, 71, 7, 75, 75, 11,
83, 83, 11, 91, 91, 11, 99, 99, 11, 107,107, 15, 7, 0, 0,
15, 0, 0, 23, 0, 0, 31, 0, 0, 39, 0, 0, 47, 0, 0,
55, 0, 0, 63, 0, 0, 71, 0, 0, 79, 0, 0, 87, 0, 0,
95, 0, 0, 103, 0, 0, 111, 0, 0, 119, 0, 0, 127, 0, 0,
19, 19, 0, 27, 27, 0, 35, 35, 0, 47, 43, 0, 55, 47, 0,
67, 55, 0, 75, 59, 7, 87, 67, 7, 95, 71, 7, 107, 75, 11,
119, 83, 15, 131, 87, 19, 139, 91, 19, 151, 95, 27, 163, 99, 31,
175,103, 35, 35, 19, 7, 47, 23, 11, 59, 31, 15, 75, 35, 19,
87, 43, 23, 99, 47, 31, 115, 55, 35, 127, 59, 43, 143, 67, 51,
159, 79, 51, 175, 99, 47, 191,119, 47, 207,143, 43, 223,171, 39,
239,203, 31, 255,243, 27, 11, 7, 0, 27, 19, 0, 43, 35, 15,
55, 43, 19, 71, 51, 27, 83, 55, 35, 99, 63, 43, 111, 71, 51,
127, 83, 63, 139, 95, 71, 155,107, 83, 167,123, 95, 183,135,107,
195,147,123, 211,163,139, 227,179,151, 171,139,163, 159,127,151,
147,115,135, 139,103,123, 127, 91,111, 119, 83, 99, 107, 75, 87,
95, 63, 75, 87, 55, 67, 75, 47, 55, 67, 39, 47, 55, 31, 35,
43, 23, 27, 35, 19, 19, 23, 11, 11, 15, 7, 7, 187,115,159,
175,107,143, 163, 95,131, 151, 87,119, 139, 79,107, 127, 75, 95,
115, 67, 83, 107, 59, 75, 95, 51, 63, 83, 43, 55, 71, 35, 43,
59, 31, 35, 47, 23, 27, 35, 19, 19, 23, 11, 11, 15, 7, 7,
219,195,187, 203,179,167, 191,163,155, 175,151,139, 163,135,123,
151,123,111, 135,111, 95, 123, 99, 83, 107, 87, 71, 95, 75, 59,
83, 63, 51, 67, 51, 39, 55, 43, 31, 39, 31, 23, 27, 19, 15,
15, 11, 7, 111,131,123, 103,123,111, 95,115,103, 87,107, 95,
79, 99, 87, 71, 91, 79, 63, 83, 71, 55, 75, 63, 47, 67, 55,
43, 59, 47, 35, 51, 39, 31, 43, 31, 23, 35, 23, 15, 27, 19,
11, 19, 11, 7, 11, 7, 255,243, 27, 239,223, 23, 219,203, 19,
203,183, 15, 187,167, 15, 171,151, 11, 155,131, 7, 139,115, 7,
123, 99, 7, 107, 83, 0, 91, 71, 0, 75, 55, 0, 59, 43, 0,
43, 31, 0, 27, 15, 0, 11, 7, 0, 0, 0,255, 11, 11,239,
19, 19,223, 27, 27,207, 35, 35,191, 43, 43,175, 47, 47,159,
47, 47,143, 47, 47,127, 47, 47,111, 47, 47, 95, 43, 43, 79,
35, 35, 63, 27, 27, 47, 19, 19, 31, 11, 11, 15, 43, 0, 0,
59, 0, 0, 75, 7, 0, 95, 7, 0, 111, 15, 0, 127, 23, 7,
147, 31, 7, 163, 39, 11, 183, 51, 15, 195, 75, 27, 207, 99, 43,
219,127, 59, 227,151, 79, 231,171, 95, 239,191,119, 247,211,139,
167,123, 59, 183,155, 55, 199,195, 55, 231,227, 87, 127,191,255,
171,231,255, 215,255,255, 103, 0, 0, 139, 0, 0, 179, 0, 0,
215, 0, 0, 255, 0, 0, 255,243,147, 255,247,199, 255,255,255,
159, 91, 83
};
const byte quake2_palette[256*3] =
{
0, 0, 0, 15, 15, 15, 31, 31, 31, 47, 47, 47, 63, 63, 63,
75, 75, 75, 91, 91, 91, 107,107,107, 123,123,123, 139,139,139,
155,155,155, 171,171,171, 187,187,187, 203,203,203, 219,219,219,
235,235,235, 99, 75, 35, 91, 67, 31, 83, 63, 31, 79, 59, 27,
71, 55, 27, 63, 47, 23, 59, 43, 23, 51, 39, 19, 47, 35, 19,
43, 31, 19, 39, 27, 15, 35, 23, 15, 27, 19, 11, 23, 15, 11,
19, 15, 7, 15, 11, 7, 95, 95,111, 91, 91,103, 91, 83, 95,
87, 79, 91, 83, 75, 83, 79, 71, 75, 71, 63, 67, 63, 59, 59,
59, 55, 55, 51, 47, 47, 47, 43, 43, 39, 39, 39, 35, 35, 35,
27, 27, 27, 23, 23, 23, 19, 19, 19, 143,119, 83, 123, 99, 67,
115, 91, 59, 103, 79, 47, 207,151, 75, 167,123, 59, 139,103, 47,
111, 83, 39, 235,159, 39, 203,139, 35, 175,119, 31, 147, 99, 27,
119, 79, 23, 91, 59, 15, 63, 39, 11, 35, 23, 7, 167, 59, 43,
159, 47, 35, 151, 43, 27, 139, 39, 19, 127, 31, 15, 115, 23, 11,
103, 23, 7, 87, 19, 0, 75, 15, 0, 67, 15, 0, 59, 15, 0,
51, 11, 0, 43, 11, 0, 35, 11, 0, 27, 7, 0, 19, 7, 0,
123, 95, 75, 115, 87, 67, 107, 83, 63, 103, 79, 59, 95, 71, 55,
87, 67, 51, 83, 63, 47, 75, 55, 43, 67, 51, 39, 63, 47, 35,
55, 39, 27, 47, 35, 23, 39, 27, 19, 31, 23, 15, 23, 15, 11,
15, 11, 7, 111, 59, 23, 95, 55, 23, 83, 47, 23, 67, 43, 23,
55, 35, 19, 39, 27, 15, 27, 19, 11, 15, 11, 7, 179, 91, 79,
191,123,111, 203,155,147, 215,187,183, 203,215,223, 179,199,211,
159,183,195, 135,167,183, 115,151,167, 91,135,155, 71,119,139,
47,103,127, 23, 83,111, 19, 75,103, 15, 67, 91, 11, 63, 83,
7, 55, 75, 7, 47, 63, 7, 39, 51, 0, 31, 43, 0, 23, 31,
0, 15, 19, 0, 7, 11, 0, 0, 0, 139, 87, 87, 131, 79, 79,
123, 71, 71, 115, 67, 67, 107, 59, 59, 99, 51, 51, 91, 47, 47,
87, 43, 43, 75, 35, 35, 63, 31, 31, 51, 27, 27, 43, 19, 19,
31, 15, 15, 19, 11, 11, 11, 7, 7, 0, 0, 0, 151,159,123,
143,151,115, 135,139,107, 127,131, 99, 119,123, 95, 115,115, 87,
107,107, 79, 99, 99, 71, 91, 91, 67, 79, 79, 59, 67, 67, 51,
55, 55, 43, 47, 47, 35, 35, 35, 27, 23, 23, 19, 15, 15, 11,
159, 75, 63, 147, 67, 55, 139, 59, 47, 127, 55, 39, 119, 47, 35,
107, 43, 27, 99, 35, 23, 87, 31, 19, 79, 27, 15, 67, 23, 11,
55, 19, 11, 43, 15, 7, 31, 11, 7, 23, 7, 0, 11, 0, 0,
0, 0, 0, 119,123,207, 111,115,195, 103,107,183, 99, 99,167,
91, 91,155, 83, 87,143, 75, 79,127, 71, 71,115, 63, 63,103,
55, 55, 87, 47, 47, 75, 39, 39, 63, 35, 31, 47, 27, 23, 35,
19, 15, 23, 11, 7, 7, 155,171,123, 143,159,111, 135,151, 99,
123,139, 87, 115,131, 75, 103,119, 67, 95,111, 59, 87,103, 51,
75, 91, 39, 63, 79, 27, 55, 67, 19, 47, 59, 11, 35, 47, 7,
27, 35, 0, 19, 23, 0, 11, 15, 0, 0,255, 0, 35,231, 15,
63,211, 27, 83,187, 39, 95,167, 47, 95,143, 51, 95,123, 51,
255,255,255, 255,255,211, 255,255,167, 255,255,127, 255,255, 83,
255,255, 39, 255,235, 31, 255,215, 23, 255,191, 15, 255,171, 7,
255,147, 0, 239,127, 0, 227,107, 0, 211, 87, 0, 199, 71, 0,
183, 59, 0, 171, 43, 0, 155, 31, 0, 143, 23, 0, 127, 15, 0,
115, 7, 0, 95, 0, 0, 71, 0, 0, 47, 0, 0, 27, 0, 0,
239, 0, 0, 55, 55,255, 255, 0, 0, 0, 0,255, 43, 43, 35,
27, 27, 23, 19, 19, 15, 235,151,127, 195,115, 83, 159, 87, 51,
123, 63, 27, 235,211,199, 199,171,155, 167,139,119, 135,107, 87,
159, 91, 83
};
const byte hexen2_palette[256*3] =
{
0, 0, 0, 0, 0, 0, 8, 8, 8, 16, 16, 16, 24, 24, 24,
32, 32, 32, 40, 40, 40, 48, 48, 48, 56, 56, 56, 64, 64, 64,
72, 72, 72, 80, 80, 80, 84, 84, 84, 88, 88, 88, 96, 96, 96,
104,104,104, 112,112,112, 120,120,120, 128,128,128, 136,136,136,
148,148,148, 156,156,156, 168,168,168, 180,180,180, 184,184,184,
196,196,196, 204,204,204, 212,212,212, 224,224,224, 232,232,232,
240,240,240, 252,252,252, 8, 8, 12, 16, 16, 20, 24, 24, 28,
28, 32, 36, 36, 36, 44, 44, 44, 52, 48, 52, 60, 56, 56, 68,
64, 64, 72, 76, 76, 88, 92, 92,104, 108,112,128, 128,132,152,
152,156,176, 168,172,196, 188,196,220, 32, 24, 20, 40, 32, 28,
48, 36, 32, 52, 44, 40, 60, 52, 44, 68, 56, 52, 76, 64, 56,
84, 72, 64, 92, 76, 72, 100, 84, 76, 108, 92, 84, 112, 96, 88,
120,104, 96, 128,112,100, 136,116,108, 144,124,112, 20, 24, 20,
28, 32, 28, 32, 36, 32, 40, 44, 40, 44, 48, 44, 48, 56, 48,
56, 64, 56, 64, 68, 64, 68, 76, 68, 84, 92, 84, 104,112,104,
120,128,120, 140,148,136, 156,164,152, 172,180,168, 188,196,184,
48, 32, 8, 60, 40, 8, 72, 48, 16, 84, 56, 20, 92, 64, 28,
100, 72, 36, 108, 80, 44, 120, 92, 52, 136,104, 60, 148,116, 72,
160,128, 84, 168,136, 92, 180,144,100, 188,152,108, 196,160,116,
204,168,124, 16, 20, 16, 20, 28, 20, 24, 32, 24, 28, 36, 28,
32, 44, 32, 36, 48, 36, 40, 56, 40, 44, 60, 44, 48, 68, 48,
52, 76, 52, 60, 84, 60, 68, 92, 64, 76,100, 72, 84,108, 76,
92,116, 84, 100,128, 92, 24, 12, 8, 32, 16, 8, 40, 20, 8,
52, 24, 12, 60, 28, 12, 68, 32, 12, 76, 36, 16, 84, 44, 20,
92, 48, 24, 100, 56, 28, 112, 64, 32, 120, 72, 36, 128, 80, 44,
144, 92, 56, 168,112, 72, 192,132, 88, 24, 4, 4, 36, 4, 4,
48, 0, 0, 60, 0, 0, 68, 0, 0, 80, 0, 0, 88, 0, 0,
100, 0, 0, 112, 0, 0, 132, 0, 0, 152, 0, 0, 172, 0, 0,
192, 0, 0, 212, 0, 0, 232, 0, 0, 252, 0, 0, 16, 12, 32,
28, 20, 48, 32, 28, 56, 40, 36, 68, 52, 44, 80, 60, 56, 92,
68, 64,104, 80, 72,116, 88, 84,128, 100, 96,140, 108,108,152,
120,116,164, 132,132,176, 144,144,188, 156,156,200, 172,172,212,
36, 20, 4, 52, 24, 4, 68, 32, 4, 80, 40, 0, 100, 48, 4,
124, 60, 4, 140, 72, 4, 156, 88, 8, 172,100, 8, 188,116, 12,
204,128, 12, 220,144, 16, 236,160, 20, 252,184, 56, 248,200, 80,
248,220,120, 20, 16, 4, 28, 24, 8, 36, 32, 8, 44, 40, 12,
52, 48, 16, 56, 56, 16, 64, 64, 20, 68, 72, 24, 72, 80, 28,
80, 92, 32, 84,104, 40, 88,116, 44, 92,128, 52, 92,140, 52,
92,148, 56, 96,160, 64, 60, 16, 16, 72, 24, 24, 84, 28, 28,
100, 36, 36, 112, 44, 44, 124, 52, 48, 140, 64, 56, 152, 76, 64,
44, 20, 8, 56, 28, 12, 72, 32, 16, 84, 40, 20, 96, 44, 28,
112, 52, 32, 124, 56, 40, 140, 64, 48, 24, 20, 16, 36, 28, 20,
44, 36, 28, 56, 44, 32, 64, 52, 36, 72, 60, 44, 80, 68, 48,
92, 76, 52, 100, 84, 60, 112, 92, 68, 120,100, 72, 132,112, 80,
144,120, 88, 152,128, 96, 160,136,104, 168,148,112, 36, 24, 12,
44, 32, 16, 52, 40, 20, 60, 44, 20, 72, 52, 24, 80, 60, 28,
88, 68, 28, 104, 76, 32, 148, 96, 56, 160,108, 64, 172,116, 72,
180,124, 80, 192,132, 88, 204,140, 92, 216,156,108, 60, 20, 92,
100, 36,116, 168, 72,164, 204,108,192, 4, 84, 4, 4,132, 4,
0,180, 0, 0,216, 0, 4, 4,144, 16, 68,204, 36,132,224,
88,168,232, 216, 4, 4, 244, 72, 0, 252,128, 0, 252,172, 24,
252,252,252
};
const byte haktoria_palette[256*3] =
{
0, 0, 0, 8, 8, 8, 16, 16, 16, 25, 25, 25, 33, 33, 33,
41, 41, 41, 49, 49, 49, 57, 57, 57, 66, 66, 66, 74, 74, 74,
82, 82, 82, 90, 90, 90, 98, 98, 98, 107,107,107, 115,115,115,
123,123,123, 131,131,131, 139,139,139, 147,147,147, 156,156,156,
164,164,164, 172,172,172, 180,180,180, 188,188,188, 197,197,197,
205,205,205, 213,213,213, 221,221,221, 229,229,229, 238,238,238,
246,246,246, 254,254,254, 8, 8, 12, 16, 16, 20, 20, 16, 36,
30, 26, 46, 40, 36, 57, 49, 47, 68, 59, 57, 78, 72, 70, 92,
86, 84,106, 99, 97,120, 112,112,135, 125,127,150, 138,141,164,
151,156,179, 174,184,208, 208,208,216, 12, 13, 5, 25, 26, 15,
38, 39, 26, 44, 45, 32, 50, 52, 37, 56, 58, 43, 67, 69, 52,
76, 78, 59, 84, 86, 65, 93, 95, 72, 104,105, 80, 115,115, 88,
125,126, 97, 136,136,105, 145,144,111, 154,151,118, 20, 24, 20,
35, 38, 35, 49, 52, 49, 64, 66, 64, 78, 81, 77, 92, 96, 90,
106,112,104, 116,121,112, 125,131,121, 134,141,130, 144,151,139,
153,161,148, 162,170,157, 171,179,166, 180,187,176, 189,196,185,
48, 32, 8, 60, 40, 8, 72, 48, 16, 84, 56, 20, 92, 64, 28,
100, 72, 36, 108, 80, 44, 120, 92, 52, 136,104, 60, 148,116, 72,
160,128, 84, 168,136, 92, 180,144,100, 188,152,108, 196,160,116,
204,168,124, 16, 20, 16, 20, 28, 20, 24, 32, 24, 28, 36, 28,
32, 44, 32, 36, 48, 36, 40, 56, 40, 44, 60, 44, 48, 68, 48,
52, 76, 52, 60, 84, 60, 68, 92, 64, 76,100, 72, 84,108, 76,
92,116, 84, 100,128, 92, 27, 15, 8, 34, 18, 10, 40, 21, 11,
47, 24, 13, 54, 28, 14, 61, 31, 16, 67, 34, 17, 74, 37, 19,
82, 43, 22, 89, 49, 26, 97, 55, 29, 112, 67, 36, 128, 79, 44,
143, 91, 51, 167,113, 71, 192,135, 91, 24, 4, 4, 46, 4, 4,
68, 3, 3, 89, 3, 3, 111, 3, 3, 133, 2, 2, 155, 2, 2,
177, 2, 2, 198, 2, 2, 220, 1, 1, 242, 1, 1, 245, 44, 44,
247, 87, 87, 250,129,129, 252,172,172, 255,215,215, 2, 4, 41,
2, 4, 51, 1, 4, 62, 1, 4, 73, 1, 4, 83, 0, 4, 93,
0, 4,104, 4, 8,131, 8, 12,157, 12, 16,184, 35, 37,207,
57, 59,230, 80, 80,253, 80,108,253, 80,136,252, 80,164,252,
36, 20, 4, 52, 24, 4, 68, 32, 4, 80, 40, 0, 97, 47, 2,
115, 61, 6, 132, 76, 9, 150, 90, 13, 167,105, 17, 185,119, 21,
202,134, 24, 220,148, 28, 230,168, 51, 241,188, 74, 251,208, 97,
251,221,123, 11, 23, 7, 17, 35, 12, 23, 48, 18, 29, 60, 23,
35, 72, 28, 41, 85, 34, 47, 97, 39, 54,112, 46, 62,127, 53,
69,142, 59, 77,157, 66, 84,172, 73, 94,192, 81, 102,213, 91,
111,234,101, 119,255,111, 60, 16, 16, 72, 24, 24, 84, 28, 28,
100, 36, 36, 112, 44, 44, 124, 52, 48, 140, 64, 56, 152, 76, 64,
44, 20, 8, 56, 28, 12, 72, 32, 16, 84, 40, 20, 96, 44, 28,
112, 52, 32, 124, 56, 40, 140, 64, 48, 24, 20, 16, 36, 28, 20,
44, 36, 28, 56, 44, 32, 64, 52, 36, 72, 60, 44, 80, 68, 48,
92, 76, 52, 100, 84, 60, 112, 92, 68, 120,100, 72, 132,112, 80,
144,120, 88, 152,128, 96, 160,136,104, 168,148,112, 43, 13, 64,
71, 24, 97, 100, 36,129, 128, 47,162, 2, 14, 20, 4, 30, 39,
8, 47, 71, 20, 69, 91, 151, 99, 59, 169,114, 70, 186,128, 82,
204,143, 93, 212,156,112, 219,170,130, 227,183,149, 140, 52,156,
168, 63,194, 197, 74,232, 254,169,253, 4, 84, 4, 4,159, 4,
3,234, 3, 121,255,121, 80,196,252, 80,216,252, 80,236,252,
188,252,244, 244, 14, 3, 248, 87, 2, 251,160, 1, 255,233, 0,
159, 91, 83,
};
void COL_WritePalette(const byte *source)
{
memcpy(palette, source, sizeof(palette));
color_cache.clear();
}
void COL_SetPalette(game_kind_e type)
{
switch (type)
{
case GAME_Quake1:
COL_WritePalette(quake1_palette);
break;
case GAME_Quake2:
COL_WritePalette(quake2_palette);
break;
case GAME_Hexen2:
COL_WritePalette(hexen2_palette);
break;
case GAME_Haktoria:
COL_WritePalette(haktoria_palette);
break;
default:
FatalError("COL_SetPalette: unknown game (%d)\n", (int)type);
}
}
void COL_SetTransparent(byte pix)
{
if (transparent_color != pix)
{
transparent_color = pix;
color_cache.clear();
}
}
void COL_SetFullBright(bool enable)
{
if (enable != allow_fullbright)
{
allow_fullbright = enable;
color_cache.clear();
}
}
u32_t COL_ReadPalette(byte pix)
{
byte R = palette[pix*3 + 0];
byte G = palette[pix*3 + 1];
byte B = palette[pix*3 + 2];
return MAKE_RGB(R, G, B);
}
u32_t COL_ReadPalWithTrans(byte pix)
{
if (pix == transparent_color)
return MAKE_RGBA(0, 0, 0, ALPHA_TRANS);
byte R = palette[pix*3 + 0];
byte G = palette[pix*3 + 1];
byte B = palette[pix*3 + 2];
return MAKE_RGB(R, G, B);
}
byte COL_FindColor(const byte *palette, u32_t rgb_col)
{
int best_idx = -1;
int best_dist = (1<<30);
// Note: we skip index #0 (black), which is used for transparency
// in skies. Black is duplicated at index #48 though.
int min_col = (game_type == GAME_Quake1) ? 1 : 0;
int max_col = allow_fullbright ? 255 : 255-32;
for (int i = min_col; i <= max_col; i++)
{
int dr = RGB_R(rgb_col) - palette[i*3+0];
int dg = RGB_G(rgb_col) - palette[i*3+1];
int db = RGB_B(rgb_col) - palette[i*3+2];
int dist = dr*dr + dg*dg + db*db;
// exact match?
if (dist == 0)
return i;
if (dist < best_dist)
{
best_idx = i;
best_dist = dist;
}
}
SYS_ASSERT(best_idx >= 0);
return best_idx;
}
byte COL_MapColor(u32_t rgb_col)
{
if (RGB_A(rgb_col) <= 128)
return transparent_color;
// ignore alpha from now on
rgb_col &= 0xFFFFFF;
if (color_cache.find(rgb_col) != color_cache.end())
return color_cache[rgb_col];
// don't let the color cache grow without limit
if ((int)color_cache.size() >= MAX_COLOR_CACHE)
{
color_cache.clear();
}
byte pal_idx = COL_FindColor(palette, rgb_col);
color_cache[rgb_col] = pal_idx;
return pal_idx;
}
void COL_LoadPaletteFromFile(const char *filename)
{
int length;
u8_t *data = FileLoad(filename, &length);
if (! data)
FatalError("Could not open colors file: %s\n", filename);
// see whether file is text or binary
bool is_binary = false;
for (int i = 0; i < length; i++)
{
if (data[i] & 0x80 || data[i] < 7)
{
is_binary = true;
break;
}
}
printf("Loading colors%s from: %s\n",
is_binary ? "" : " (TEXT)", filename);
if (is_binary)
{
if (length < (int)sizeof(palette))
FatalError("Colors file too short!\n");
memcpy(palette, data, sizeof(palette));
}
else
{
// modify the text : nothing but digits and spaces
for (int i = 0; i < length; i++)
{
if (! isalnum(data[i]))
data[i] = ' ';
}
// parse R,G,B triplets
// NOTE that FileLoad() ensures a NUL-terminated buffer
const char *buf = (char *)data;
for (int pix = 0; pix < 256; pix++)
{
while (*buf == ' ') buf++;
if (*buf == 0)
FatalError("Not enough colors (failed at #%d)\n", pix);
int R=0, G=0, B=0;
int num_chars = 0;
int got = sscanf(buf, "%d %d %d%n", &R, &G, &B, &num_chars);
if (got == EOF || got == 0)
FatalError("Not enough colors (failed at #%d)\n", pix);
if (R < 0 || R > 255 ||
G < 0 || G > 255 ||
B < 0 || B > 255)
{
FatalError("Bad color at #%d : (%d %d %d)\n", pix, R, G, B);
}
palette[pix*3+0] = R;
palette[pix*3+1] = G;
palette[pix*3+2] = B;
buf += num_chars;
}
}
FileFree(data);
}
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