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libglitter_desaturate_double.c
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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
void
libglitter_desaturate_double(double *restrict *rasters, size_t nrasters, size_t rowsize, size_t cellsize,
size_t width, size_t height, double saturation, const double *restrict primary_ys)
{
size_t y, x, ch, raster_y, raster_i;
double intensity;
rowsize *= cellsize;
if (nrasters == 3) {
double *raster1 = rasters[0];
double *raster2 = rasters[1];
double *raster3 = rasters[2];
double primary1_y = primary_ys ? primary_ys[0] : (double)0.212673370378408277403536885686;
double primary2_y = primary_ys ? primary_ys[1] : (double)0.715151730491031756287156895269;
double primary3_y = primary_ys ? primary_ys[2] : (double)0.072174899130559869164791564344;
for (y = 0, raster_y = 0; y < height; y++, raster_y += rowsize) {
for (x = 0, raster_i = raster_y; x < width; x++, raster_i += cellsize) {
intensity = raster1[raster_i] * primary1_y;
intensity += raster2[raster_i] * primary2_y;
intensity += raster3[raster_i] * primary3_y;
raster1[raster_i] = fma(raster1[raster_i] - intensity, saturation, intensity);
raster2[raster_i] = fma(raster2[raster_i] - intensity, saturation, intensity);
raster3[raster_i] = fma(raster3[raster_i] - intensity, saturation, intensity);
}
}
} else {
for (y = 0, raster_y = 0; y < height; y++, raster_y += rowsize) {
for (x = 0, raster_i = raster_y; x < width; x++, raster_i += cellsize) {
intensity = 0;
for (ch = 0; ch < nrasters; ch++)
intensity += rasters[ch][raster_i] * primary_ys[ch];
for (ch = 0; ch < nrasters; ch++)
rasters[ch][raster_i] = fma(rasters[ch][raster_i] - intensity, saturation, intensity);
}
}
}
}
#else
int
main(void)
{
double rasters1[4 * 10 * 3][4], *rasters1list[4], primary_ys[4], saturation;
double rasters2[4 * 10 * 3][4], *rasters2list[4], saturations[4];
size_t i, j;
int randint;
void *randptr = malloc(1);
srand((unsigned int)(uintptr_t)randptr);
free(randptr);
#define RANDOMISE(SAT)\
do {\
saturation = (SAT);\
saturations[0] = saturation;\
saturations[1] = saturation;\
saturations[2] = saturation;\
saturations[3] = saturation;\
for (i = 0; i < 4; i++) {\
rasters1list[i] = rasters1[i];\
rasters2list[i] = rasters2[i];\
randint = rand();\
primary_ys[i] = (double)randint / (double)RAND_MAX;\
for (j = 0; j < 4 * 10 * 3; j++) {\
randint = rand();\
rasters1[j][i] = (double)randint / (double)RAND_MAX;\
}\
}\
memcpy(rasters2, rasters1, sizeof(rasters1));\
} while (0)
RANDOMISE((double)(randint = rand(), randint) / (double)RAND_MAX);
libglitter_desaturate_double(rasters1list, 4, 10, 3, 7, 4, saturation, primary_ys);
libglitter_per_channel_desaturate_double(rasters2list, 4, 10, 3, 7, 4, saturations, primary_ys);
ASSERT(!memcmp(rasters1, rasters2, sizeof(rasters1)));
RANDOMISE((double)(randint = rand(), randint) / (double)RAND_MAX);
libglitter_desaturate_double(rasters1list, 3, 10, 3, 7, 4, saturation, primary_ys);
libglitter_per_channel_desaturate_double(rasters2list, 3, 10, 3, 7, 4, saturations, primary_ys);
ASSERT(!memcmp(rasters1, rasters2, sizeof(rasters1)));
RANDOMISE((double)(randint = rand(), randint) / (double)RAND_MAX);
libglitter_desaturate_double(rasters1list, 3, 10, 3, 7, 4, saturation, NULL);
libglitter_per_channel_desaturate_double(rasters2list, 3, 10, 3, 7, 4, saturations, NULL);
ASSERT(!memcmp(rasters1, rasters2, sizeof(rasters1)));
RANDOMISE(0);
libglitter_desaturate_double(rasters1list, 4, 10, 3, 7, 4, saturation, primary_ys);
libglitter_per_channel_desaturate_double(rasters2list, 4, 10, 3, 7, 4, saturations, primary_ys);
ASSERT(!memcmp(rasters1, rasters2, sizeof(rasters1)));
RANDOMISE(0);
libglitter_desaturate_double(rasters1list, 3, 10, 3, 7, 4, saturation, primary_ys);
libglitter_per_channel_desaturate_double(rasters2list, 3, 10, 3, 7, 4, saturations, primary_ys);
ASSERT(!memcmp(rasters1, rasters2, sizeof(rasters1)));
RANDOMISE(0);
libglitter_desaturate_double(rasters1list, 3, 10, 3, 7, 4, saturation, NULL);
libglitter_per_channel_desaturate_double(rasters2list, 3, 10, 3, 7, 4, saturations, NULL);
ASSERT(!memcmp(rasters1, rasters2, sizeof(rasters1)));
RANDOMISE(1);
libglitter_desaturate_double(rasters1list, 4, 10, 3, 7, 4, saturation, primary_ys);
libglitter_per_channel_desaturate_double(rasters2list, 4, 10, 3, 7, 4, saturations, primary_ys);
ASSERT(!memcmp(rasters1, rasters2, sizeof(rasters1)));
RANDOMISE(1);
libglitter_desaturate_double(rasters1list, 3, 10, 3, 7, 4, saturation, primary_ys);
libglitter_per_channel_desaturate_double(rasters2list, 3, 10, 3, 7, 4, saturations, primary_ys);
ASSERT(!memcmp(rasters1, rasters2, sizeof(rasters1)));
RANDOMISE(1);
libglitter_desaturate_double(rasters1list, 3, 10, 3, 7, 4, saturation, NULL);
libglitter_per_channel_desaturate_double(rasters2list, 3, 10, 3, 7, 4, saturations, NULL);
ASSERT(!memcmp(rasters1, rasters2, sizeof(rasters1)));
return 0;
}
#endif