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, size_t length); 35 float lut_interp_linear_float(float value, float *table, size_t length); 36 uint16_t lut_interp_linear16(uint16_t input_value, uint16_t *table, size_t length); 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_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 60
