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| 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 Softwar
e |
| 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 input_value, uint16_t *table, size_t length); |
| 35 float lut_interp_linear_float(float input_value, float *table, size_t length); |
| 36 uint16_t lut_interp_linear16(uint16_t input_value, uint16_t *table, size_t lengt
h); |
| 37 |
| 38 |
| 39 static inline float lerp(float a, float b, float t) |
| 40 { |
| 41 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_leng
th); |
| 54 |
| 55 struct matrix matrix_invert(struct matrix mat); |
| 56 qcms_bool compute_precache(struct curveType *trc, uint8_t *output); |
| 57 |
| 58 #endif |
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