/**
* libgamma — Display server abstraction layer for gamma ramp adjustments
* Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
*
* This library 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 library 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 library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "gamma-helper.h"
#include "libgamma-method.h"
#include "libgamma-error.h"
#include <errno.h>
#include <stdlib.h>
#include <stdint.h>
#define ANY bits64
/**
* Get current the gamma ramps for a CRTC, re-encoding version
*
* @param this The CRTC state
* @param ramps The gamma ramps to fill with the current values
* @param depth_user The depth of the gamma ramps that are provided by the user,
* `-1` for `float`, `-2` for `double`
* @param depth_system The depth of the gamma ramps as required by the adjustment method,
* `-1` for `float`, `-2` for `double`
* @param fun Function that is to be used read the ramps, its parameters have
* the same function as those of this function with the same names,
* and the return value too is identical
* @return Zero on success, otherwise (negative) the value of an
* error identifier provided by this library
*/
int libgamma_translated_ramp_get_(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps_any_t* restrict ramps,
signed depth_user, signed depth_system,
libgamma_get_ramps_any_fun* fun)
{
size_t n = ramps->ANY.red_size + ramps->ANY.green_size + ramps->ANY.blue_size;
size_t d, i;
int r, e;
libgamma_gamma_ramps_any_t ramps_sys;
uint64_t* ramps_full;
switch (depth_system)
{
case 16: d = sizeof(uint16_t); break;
case 32: d = sizeof(uint32_t); break;
case 64: d = sizeof(uint64_t); break;
case -1: d = sizeof(float); break;
case -2: d = sizeof(double); break;
default:
return errno = EINVAL, LIBGAMMA_ERRNO_SET;
}
ramps_sys.ANY. red_size = ramps->ANY. red_size;
ramps_sys.ANY.green_size = ramps->ANY.green_size;
ramps_sys.ANY. blue_size = ramps->ANY. blue_size;
ramps_sys.ANY.red = malloc(n * d);
ramps_sys.ANY.green = (void*)(((char*)(ramps_sys.ANY. red)) + ramps->ANY. red_size * d / sizeof(char));
ramps_sys.ANY.blue = (void*)(((char*)(ramps_sys.ANY.green)) + ramps->ANY.green_size * d / sizeof(char));
if (ramps_sys.ANY.red == NULL)
return LIBGAMMA_ERRNO_SET;
if ((r = fun(this, &ramps_sys)))
{
e = errno;
free(ramps_sys.ANY.red);
return errno = e, r;
}
ramps_full = malloc(n * sizeof(uint64_t));
if (ramps_full)
{
e = errno;
free(ramps_sys.ANY.red);
return errno = e, r;
}
switch (depth_system)
{
case 16:
for (i = 0; i < n; i++)
ramps_full[i] = (uint64_t)(ramps_sys.bits16.red[i]) * 0x0001000100010001ULL;
break;
case 32:
for (i = 0; i < n; i++)
ramps_full[i] = (uint64_t)(ramps_sys.bits32.red[i]) * 0x0000000100000001ULL;
break;
case 64:
for (i = 0; i < n; i++)
ramps_full[i] = ramps_sys.bits64.red[i];
break;
case -1:
for (i = 0; i < n; i++)
ramps_full[i] = (uint64_t)(ramps_sys.float_single.red[i] * (float)UINT64_MAX);
break;
case -2:
for (i = 0; i < n; i++)
ramps_full[i] = (uint64_t)(ramps_sys.float_double.red[i] * (double)UINT64_MAX);
break;
default: /* This is not possible. */
abort();
break;
}
free(ramps_sys.ANY.red);
if ((0 < depth_user) && (depth_user < 64))
for (i = 0; i < n; i++)
{
ramps_full[i] >>= (64 - depth_user - 1);
ramps_full[i] = (ramps_full[i] & 1) | (ramps_full[i] >> 1);
}
switch (depth_user)
{
case 16:
for (i = 0; i < n; i++)
ramps->bits16.red[i] = (uint16_t)(ramps_full[i]);
break;
case 32:
for (i = 0; i < n; i++)
ramps->bits32.red[i] = (uint32_t)(ramps_full[i]);
break;
case 64:
for (i = 0; i < n; i++)
ramps->bits64.red[i] = ramps_full[i];
break;
case -1:
for (i = 0; i < n; i++)
ramps->float_single.red[i] = (float)(ramps_full[i]) / (float)UINT64_MAX;
break;
case -2:
for (i = 0; i < n; i++)
ramps->float_double.red[i] = (double)(ramps_full[i]) / (double)UINT64_MAX;
break;
default: /* This is not possible. */
abort();
break;
}
free(ramps_full);
return 0;
}
/**
* Set the gamma ramps for a CRTC, re-encoding version
*
* @param this The CRTC state
* @param ramps The gamma ramps to apply
* @param depth_user The depth of the gamma ramps that are provided by the user,
* `-1` for `float`, `-2` for `double`
* @param depth_system The depth of the gamma ramps as required by the adjustment method,
* `-1` for `float`, `-2` for `double`
* @param fun Function that is to be used write the ramps, its parameters have
* the same function as those of this function with the same names,
* and the return value too is identical
* @return Zero on success, otherwise (negative) the value of an
* error identifier provided by this library
*/
int libgamma_translated_ramp_set_(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps_any_t ramps,
signed depth_user, signed depth_system,
libgamma_set_ramps_any_fun* fun)
{
}
#undef ANY
