/**
* coopgammad -- Cooperative gamma server
* Copyright (C) 2016 Mattias Andrée (maandree@kth.se)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ramps.h"
#include <libclut.h>
#include <errno.h>
#include <stdlib.h>
#include <string.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 != NULL)
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;
}
/**
* Apply a ramp-trio on top of another ramp-trio
*
* @param dest The output for the resulting ramp-trio, must be initialised
* @param application The red, green and blue ramps, as one single raw array,
* of the filter that should be applied
* @param depth -1: `float` stops
* -2: `double` stops
* Other: the number of bits of each (integral) stop
* @param base The CLUT on top of which the new filter should be applied,
* this can be the same pointer as `dest`
*/
void apply(union gamma_ramps* restrict dest, void* restrict application,
int depth, union gamma_ramps* restrict base)
{
union gamma_ramps app;
size_t bytedepth;
size_t red_width, green_width, blue_width;
if (depth == -1)
bytedepth = sizeof(float);
else if (depth == -2)
bytedepth = sizeof(double);
else
bytedepth = (size_t)depth / 8;
red_width = (app.u8.red_size = base->u8.red_size) * bytedepth;
green_width = (app.u8.green_size = base->u8.green_size) * bytedepth;
blue_width = (app.u8.blue_size = base->u8.blue_size) * bytedepth;
app.u8.red = application;
app.u8.green = app.u8.red + red_width;
app.u8.blue = app.u8.green + green_width;
if (dest != base)
{
memcpy(dest->u8.red, base->u8.red, red_width);
memcpy(dest->u8.green, base->u8.green, green_width);
memcpy(dest->u8.blue, base->u8.blue, blue_width);
}
switch (depth)
{
case 8:
libclut_apply(&(dest->u8), UINT8_MAX, uint8_t, &(app.u8), UINT8_MAX, uint8_t, 1, 1, 1);
break;
case 16:
libclut_apply(&(dest->u16), UINT16_MAX, uint16_t, &(app.u16), UINT16_MAX, uint16_t, 1, 1, 1);
break;
case 32:
libclut_apply(&(dest->u32), UINT32_MAX, uint32_t, &(app.u32), UINT32_MAX, uint32_t, 1, 1, 1);
break;
case 64:
libclut_apply(&(dest->u64), UINT64_MAX, uint64_t, &(app.u64), UINT64_MAX, uint64_t, 1, 1, 1);
break;
case -1:
libclut_apply(&(dest->f), 1.0f, float, &(app.d), 1.0f, float, 1, 1, 1);
break;
case -2:
libclut_apply(&(dest->d), (double)1, double, &(app.f), (double)1, double, 1, 1, 1);
break;
default:
abort();
}
}
