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98 lines
2.3 KiB
98 lines
2.3 KiB
2 months ago
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/*
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* Color spaces tool
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*
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* (c) 2006 Pavel Charvat <pchar@ucw.cz>
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*
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* This software may be freely distributed and used according to the terms
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* of the GNU General Public License.
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*/
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#include <ucw/lib.h>
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#include <images/images.h>
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#include <images/color.h>
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#include <getopt.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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static void NONRET
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usage(void)
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{
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fputs("\
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Usage: ucw-color-tool input-color-space output-color-space\n\
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", stderr);
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exit(1);
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}
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static char *shortopts = "";
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static struct option longopts[] =
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{
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{ NULL, 0, 0, 0 }
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};
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static const struct color_space_info *
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parse_color_space(byte *s)
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{
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if (!strcasecmp(s, "sRGB"))
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return &color_srgb_info;
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else if (!strcasecmp(s, "AdobeRGB") || !strcasecmp(s, "Adobe RGB"))
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return &color_adobe_rgb_info;
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else if (!strcasecmp(s, "CIERGB") || strcasecmp(s, "CIE RGB"))
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return &color_cie_rgb_info;
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else
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die("Unknown color space");
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}
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static void
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print_matrix(double m[9])
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{
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for (uint j = 0; j < 3; j++)
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{
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for (uint i = 0; i < 3; i++)
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printf(" %12.8f", m[i + j * 3]);
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printf("\n");
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}
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}
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int
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main(int argc, char **argv)
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{
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log_init(argv[0]);
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int opt;
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while ((opt = getopt_long(argc, argv, shortopts, longopts, NULL)) >= 0)
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switch (opt)
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{
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default:
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usage();
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}
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if (argc == optind + 1)
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{
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const struct color_space_info *a = parse_color_space(argv[optind]);
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double a_to_xyz[9], xyz_to_a[9];
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color_compute_color_space_to_xyz_matrix(a_to_xyz, &a->chromacity);
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color_invert_matrix(xyz_to_a, a_to_xyz);
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printf("linear %s -> XYZ:\n", a->name);
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print_matrix(a_to_xyz);
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printf("XYZ -> linear %s:\n", a->name);
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print_matrix(xyz_to_a);
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printf("Simple gamma: %.8f\n", a->gamma.simple_gamma);
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printf("Detailed gamma: g=%.8f o=%.8f t=%.8f s=%.8f\n", a->gamma.detailed_gamma, a->gamma.offset, a->gamma.transition, a->gamma.slope);
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}
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else if (argc == optind + 2)
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{
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const struct color_space_info *a = parse_color_space(argv[optind++]);
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const struct color_space_info *b = parse_color_space(argv[optind]);
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double a_to_b[9];
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color_compute_color_spaces_conversion_matrix(a_to_b, &a->chromacity, &b->chromacity);
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printf("linear %s -> linear %s:\n", a->name, b->name);
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print_matrix(a_to_b);
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}
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else
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usage();
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return 0;
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}
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