1 /* babl - dynamically extendable universal pixel conversion library.
2 * Copyright (C) 2005, Øyvind Kolås.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 3 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General
15 * Public License along with this library; if not, see
16 * <https://www.gnu.org/licenses/>.
17 */
18
19 #include <math.h>
20 #include <babl/babl.h>
21 #include <stdio.h>
22
23 #define PIXELS 6
24 #define TOLERANCE 0
25
26 unsigned char source_buf [PIXELS * 3] =
27 { 0, 0, 0,
28 127, 127, 127,
29 255, 255, 255,
30 255, 0.0, 0.0,
31 0.0, 255, 0.0,
32 0.0, 0.0, 255 };
33
34 unsigned char reference_buf [PIXELS * 3] =
35 { 0, 128, 128,
36 136, 128, 128,
37 255, 128, 128,
38 138, 209, 198,
39 224, 49, 209,
40 75, 196, 16 };
41
42 unsigned char destination_buf [PIXELS * 3];
43
44 static int
test(void)45 test (void)
46 {
47 int i;
48 int OK = 1;
49
50 babl_process (babl_fish ("R'G'B' u8", "CIE Lab u8"),
51 source_buf, destination_buf,
52 PIXELS);
53
54 for (i = 0; i < PIXELS * 3; i++)
55 {
56 if (fabs (1.0 * destination_buf[i] - reference_buf[i]) > TOLERANCE)
57 {
58 fprintf (stderr, "%2i (%2i%%3=%i, %2i/3=%i) is %i should be %i",
59 i, i, i % 3, i, i / 3, destination_buf[i], reference_buf[i]);
60 OK = 0;
61 }
62 }
63 if (!OK)
64 return -1;
65 return 0;
66 }
67
68 int
main(int argc,char ** argv)69 main (int argc,
70 char **argv)
71 {
72 babl_init ();
73 if (test ())
74 return -1;
75 babl_exit ();
76 return 0;
77 }
78