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