From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- gfx/qcms/transform_util.h | 104 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 gfx/qcms/transform_util.h (limited to 'gfx/qcms/transform_util.h') diff --git a/gfx/qcms/transform_util.h b/gfx/qcms/transform_util.h new file mode 100644 index 000000000..9d9514e99 --- /dev/null +++ b/gfx/qcms/transform_util.h @@ -0,0 +1,104 @@ +/* vim: set ts=8 sw=8 noexpandtab: */ +// qcms +// Copyright (C) 2009 Mozilla Foundation +// Copyright (C) 1998-2007 Marti Maria +// +// Permission is hereby granted, free of charge, to any person obtaining +// a copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the Software +// is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO +// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +#ifndef _QCMS_TRANSFORM_UTIL_H +#define _QCMS_TRANSFORM_UTIL_H + +#include +#include + +#define CLU(table,x,y,z) table[(x*len + y*x_len + z*xy_len)*3] + +//XXX: could use a bettername +typedef uint16_t uint16_fract_t; + +float lut_interp_linear(double value, uint16_t *table, int length); +float lut_interp_linear_float(float value, float *table, int length); +uint16_t lut_interp_linear16(uint16_t input_value, uint16_t *table, int length); + + +static inline float lerp(float a, float b, float t) +{ + return a*(1.f-t) + b*t; +} + +static inline unsigned char clamp_u8(float v) +{ + if (v > 255.) + return 255; + else if (v < 0) + return 0; + else + return floorf(v+.5); +} + +static inline float clamp_float(float a) +{ + /* One would naturally write this function as the following: + if (a > 1.) + return 1.; + else if (a < 0) + return 0; + else + return a; + + However, that version will let NaNs pass through which is undesirable + for most consumers. + */ + + if (a > 1.) + return 1.; + else if (a >= 0) + return a; + else // a < 0 or a is NaN + return 0; +} + +static inline float u8Fixed8Number_to_float(uint16_t x) +{ + // 0x0000 = 0. + // 0x0100 = 1. + // 0xffff = 255 + 255/256 + return x/256.; +} + +float *build_input_gamma_table(struct curveType *TRC); +struct matrix build_colorant_matrix(qcms_profile *p); +void build_output_lut(struct curveType *trc, + uint16_t **output_gamma_lut, size_t *output_gamma_lut_length); + +struct matrix matrix_invert(struct matrix mat); +qcms_bool compute_precache(struct curveType *trc, uint8_t *output); + +// Tested by GTest +#ifdef __cplusplus +extern "C" { +#endif + +uint16_fract_t lut_inverse_interp16(uint16_t Value, uint16_t LutTable[], int length); + +#ifdef __cplusplus +} +#endif + +#endif -- cgit v1.2.3