/src/libjpeg-turbo.2.0.x/cmyk.h
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1 | | /* |
2 | | * cmyk.h |
3 | | * |
4 | | * Copyright (C) 2017-2018, D. R. Commander. |
5 | | * For conditions of distribution and use, see the accompanying README.ijg |
6 | | * file. |
7 | | * |
8 | | * This file contains convenience functions for performing quick & dirty |
9 | | * CMYK<->RGB conversion. This algorithm is suitable for testing purposes |
10 | | * only. Properly converting between CMYK and RGB requires a color management |
11 | | * system. |
12 | | */ |
13 | | |
14 | | #ifndef CMYK_H |
15 | | #define CMYK_H |
16 | | |
17 | | #include <jinclude.h> |
18 | | #define JPEG_INTERNALS |
19 | | #include <jpeglib.h> |
20 | | #include "jconfigint.h" |
21 | | |
22 | | |
23 | | /* Fully reversible */ |
24 | | |
25 | | INLINE |
26 | | LOCAL(void) |
27 | | rgb_to_cmyk(JSAMPLE r, JSAMPLE g, JSAMPLE b, JSAMPLE *c, JSAMPLE *m, |
28 | | JSAMPLE *y, JSAMPLE *k) |
29 | 13.6M | { |
30 | 13.6M | double ctmp = 1.0 - ((double)r / 255.0); |
31 | 13.6M | double mtmp = 1.0 - ((double)g / 255.0); |
32 | 13.6M | double ytmp = 1.0 - ((double)b / 255.0); |
33 | 13.6M | double ktmp = MIN(MIN(ctmp, mtmp), ytmp); |
34 | | |
35 | 13.6M | if (ktmp == 1.0) ctmp = mtmp = ytmp = 0.0; |
36 | 8.63M | else { |
37 | 8.63M | ctmp = (ctmp - ktmp) / (1.0 - ktmp); |
38 | 8.63M | mtmp = (mtmp - ktmp) / (1.0 - ktmp); |
39 | 8.63M | ytmp = (ytmp - ktmp) / (1.0 - ktmp); |
40 | 8.63M | } |
41 | 13.6M | *c = (JSAMPLE)(255.0 - ctmp * 255.0 + 0.5); |
42 | 13.6M | *m = (JSAMPLE)(255.0 - mtmp * 255.0 + 0.5); |
43 | 13.6M | *y = (JSAMPLE)(255.0 - ytmp * 255.0 + 0.5); |
44 | 13.6M | *k = (JSAMPLE)(255.0 - ktmp * 255.0 + 0.5); |
45 | 13.6M | } Line | Count | Source | 29 | 7.54M | { | 30 | 7.54M | double ctmp = 1.0 - ((double)r / 255.0); | 31 | 7.54M | double mtmp = 1.0 - ((double)g / 255.0); | 32 | 7.54M | double ytmp = 1.0 - ((double)b / 255.0); | 33 | 7.54M | double ktmp = MIN(MIN(ctmp, mtmp), ytmp); | 34 | | | 35 | 7.54M | if (ktmp == 1.0) ctmp = mtmp = ytmp = 0.0; | 36 | 7.02M | else { | 37 | 7.02M | ctmp = (ctmp - ktmp) / (1.0 - ktmp); | 38 | 7.02M | mtmp = (mtmp - ktmp) / (1.0 - ktmp); | 39 | 7.02M | ytmp = (ytmp - ktmp) / (1.0 - ktmp); | 40 | 7.02M | } | 41 | 7.54M | *c = (JSAMPLE)(255.0 - ctmp * 255.0 + 0.5); | 42 | 7.54M | *m = (JSAMPLE)(255.0 - mtmp * 255.0 + 0.5); | 43 | 7.54M | *y = (JSAMPLE)(255.0 - ytmp * 255.0 + 0.5); | 44 | 7.54M | *k = (JSAMPLE)(255.0 - ktmp * 255.0 + 0.5); | 45 | 7.54M | } |
Line | Count | Source | 29 | 6.06M | { | 30 | 6.06M | double ctmp = 1.0 - ((double)r / 255.0); | 31 | 6.06M | double mtmp = 1.0 - ((double)g / 255.0); | 32 | 6.06M | double ytmp = 1.0 - ((double)b / 255.0); | 33 | 6.06M | double ktmp = MIN(MIN(ctmp, mtmp), ytmp); | 34 | | | 35 | 6.06M | if (ktmp == 1.0) ctmp = mtmp = ytmp = 0.0; | 36 | 1.61M | else { | 37 | 1.61M | ctmp = (ctmp - ktmp) / (1.0 - ktmp); | 38 | 1.61M | mtmp = (mtmp - ktmp) / (1.0 - ktmp); | 39 | 1.61M | ytmp = (ytmp - ktmp) / (1.0 - ktmp); | 40 | 1.61M | } | 41 | 6.06M | *c = (JSAMPLE)(255.0 - ctmp * 255.0 + 0.5); | 42 | 6.06M | *m = (JSAMPLE)(255.0 - mtmp * 255.0 + 0.5); | 43 | 6.06M | *y = (JSAMPLE)(255.0 - ytmp * 255.0 + 0.5); | 44 | 6.06M | *k = (JSAMPLE)(255.0 - ktmp * 255.0 + 0.5); | 45 | 6.06M | } |
Unexecuted instantiation: wrbmp.c:rgb_to_cmyk Unexecuted instantiation: wrppm.c:rgb_to_cmyk |
46 | | |
47 | | |
48 | | /* Fully reversible only for C/M/Y/K values generated with rgb_to_cmyk() */ |
49 | | |
50 | | INLINE |
51 | | LOCAL(void) |
52 | | cmyk_to_rgb(JSAMPLE c, JSAMPLE m, JSAMPLE y, JSAMPLE k, JSAMPLE *r, JSAMPLE *g, |
53 | | JSAMPLE *b) |
54 | 0 | { |
55 | 0 | *r = (JSAMPLE)((double)c * (double)k / 255.0 + 0.5); |
56 | 0 | *g = (JSAMPLE)((double)m * (double)k / 255.0 + 0.5); |
57 | 0 | *b = (JSAMPLE)((double)y * (double)k / 255.0 + 0.5); |
58 | 0 | } Unexecuted instantiation: rdbmp.c:cmyk_to_rgb Unexecuted instantiation: rdppm.c:cmyk_to_rgb Unexecuted instantiation: wrbmp.c:cmyk_to_rgb Unexecuted instantiation: wrppm.c:cmyk_to_rgb |
59 | | |
60 | | |
61 | | #endif /* CMYK_H */ |