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
32 : typedef uint16_t uint16_fract_t;
33 :
34 : float lut_interp_linear(double value, uint16_t *table, int length);
35 : float lut_interp_linear_float(float value, float *table, int length);
36 : uint16_t lut_interp_linear16(uint16_t input_value, uint16_t *table, int length);
37 :
38 :
39 0 : static inline float lerp(float a, float b, float t)
40 : {
41 0 : return a*(1.f-t) + b*t;
42 : }
43 :
44 : unsigned char clamp_u8(float v);
45 : float clamp_float(float a);
46 :
47 : float u8Fixed8Number_to_float(uint16_t x);
48 :
49 :
50 : float *build_input_gamma_table(struct curveType *TRC);
51 : struct matrix build_colorant_matrix(qcms_profile *p);
52 : void build_output_lut(struct curveType *trc,
53 : uint16_t **output_gamma_lut, size_t *output_gamma_lut_length);
54 :
55 : struct matrix matrix_invert(struct matrix mat);
56 : qcms_bool compute_precache(struct curveType *trc, uint8_t *output);
57 :
58 :
59 : #endif
|