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/* See LICENSE file for copyright and license details. */
#include "types-ramps.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <libclut.h>
/**
* The name of the process
*/
extern char *restrict argv0;
/**
* Marshal a ramp trio
*
* @param this The ramps
* @param buf Output buffer for the marshalled ramps,
* `NULL` just measure how large the buffers
* needs to be
* @param ramps_size The byte-size of ramps
* @return The number of marshalled byte
*/
size_t
gamma_ramps_marshal(const union gamma_ramps *restrict this, void *restrict buf, size_t ramps_size)
{
if (buf)
memcpy(buf, this->u8.red, ramps_size);
return ramps_size;
}
/**
* Unmarshal a ramp trio
*
* @param this Output for the ramps, `.red_size`, `.green_size`,
* and `.blue_size` must already be set
* @param buf Buffer with the marshalled ramps
* @param ramps_size The byte-size of ramps
* @return The number of unmarshalled bytes, 0 on error
*/
size_t
gamma_ramps_unmarshal(union gamma_ramps *restrict this, const void *restrict buf, size_t ramps_size)
{
size_t depth = ramps_size / (this->u8.red_size + this->u8.green_size + this->u8.blue_size);
int r = 0;
switch (depth) {
case 1:
r = libgamma_gamma_ramps8_initialise(&this->u8);
break;
case 2:
r = libgamma_gamma_ramps16_initialise(&this->u16);
break;
case 4:
r = libgamma_gamma_ramps32_initialise(&this->u32);
break;
case 8:
r = libgamma_gamma_ramps64_initialise(&this->u64);
break;
default:
if (depth == sizeof(float))
r = libgamma_gamma_rampsf_initialise(&this->f);
else if (depth == sizeof(double))
r = libgamma_gamma_rampsd_initialise(&this->d);
else
abort();
break;
}
if (r) {
libgamma_perror(argv0, r);
errno = 0;
return 0;
}
memcpy(this->u8.red, buf, ramps_size);
return ramps_size;
}
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