1/* vim: set ts=8 sw=8 noexpandtab: */
2//  qcms
3//  Copyright (C) 2009 Mozilla Foundation
4//  Copyright (C) 1998-2007 Marti Maria
5//
6// Permission is hereby granted, free of charge, to any person obtaining
7// a copy of this software and associated documentation files (the "Software"),
8// to deal in the Software without restriction, including without limitation
9// the rights to use, copy, modify, merge, publish, distribute, sublicense,
10// and/or sell copies of the Software, and to permit persons to whom the Software
11// is furnished to do so, subject to the following conditions:
12//
13// The above copyright notice and this permission notice shall be included in
14// all copies or substantial portions of the Software.
15//
16// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
18// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23
24#ifndef _QCMS_TRANSFORM_UTIL_H
25#define _QCMS_TRANSFORM_UTIL_H
26
27#include <stdlib.h>
28
29#define CLU(table,x,y,z) table[(x*len + y*x_len + z*xy_len)*3]
30
31//XXX: could use a bettername
32typedef uint16_t uint16_fract_t;
33
34float lut_interp_linear(double value, uint16_t *table, size_t length);
35float lut_interp_linear_float(float value, float *table, size_t length);
36uint16_t lut_interp_linear16(uint16_t input_value, uint16_t *table, size_t length);
37
38
39static inline float lerp(float a, float b, float t)
40{
41        return a*(1.f-t) + b*t;
42}
43
44unsigned char clamp_u8(float v);
45float clamp_float(float a);
46
47float u8Fixed8Number_to_float(uint16_t x);
48
49
50float *build_input_gamma_table(struct curveType *TRC);
51struct matrix build_colorant_matrix(qcms_profile *p);
52void build_output_lut(struct curveType *trc,
53                      uint16_t **output_gamma_lut, size_t *output_gamma_lut_length);
54
55struct matrix matrix_invert(struct matrix mat);
56qcms_bool compute_precache(struct curveType *trc, uint8_t *output);
57
58
59#endif
60