mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-01 14:45:29 +00:00
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/* 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 <stdlib.h>
|
|
|
|
#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);
|
|
|
|
|
|
#endif
|