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/* See LICENSE file for copyright and license details. */
#define IN_LIBGAMMA_DUMMY
#include "common.h"
/**
* Restore the gamma ramps for a CRTC to the system settings for that CRTC
* and ignore the method's capabilities
*
* @param this The CRTC data
* @return Zero on success, otherwise (negative) the value of an
* error identifier provided by this library
*/
int
libgamma_dummy_internal_crtc_restore_forced(struct libgamma_dummy_crtc *restrict data)
{
size_t rn = data->info. red_gamma_size;
size_t gn = data->info.green_gamma_size;
size_t bn = data->info. blue_gamma_size;
double rm = (double)(rn - 1);
double gm = (double)(gn - 1);
double bm = (double)(bn - 1);
size_t i;
if (!data->gamma_red)
return 0;
#define RESET_RAMPS(TYPE, MAX)\
do {\
TYPE *red = data->gamma_red;\
TYPE *green = data->gamma_green;\
TYPE *blue = data->gamma_blue;\
for (i = 0; i < rn; i++) red [i] = (TYPE)((double)(MAX) * ((double)i / rm));\
for (i = 0; i < gn; i++) green[i] = (TYPE)((double)(MAX) * ((double)i / gm));\
for (i = 0; i < bn; i++) blue [i] = (TYPE)((double)(MAX) * ((double)i / bm));\
} while (0)
if (data->info.gamma_depth == 8) RESET_RAMPS(uint8_t, INT8_MAX);
else if (data->info.gamma_depth == 16) RESET_RAMPS(uint16_t, INT16_MAX);
else if (data->info.gamma_depth == 32) RESET_RAMPS(uint32_t, INT32_MAX);
else if (data->info.gamma_depth == 64) RESET_RAMPS(uint64_t, INT64_MAX);
else if (data->info.gamma_depth == -1) RESET_RAMPS(float, 1);
else RESET_RAMPS(double, 1);
#undef RESET_RAMPS
return 0;
}
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