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/**
* libgamma -- Display server abstraction layer for gamma ramp adjustments
* Copyright (C) 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/>.
*/
#ifndef LIBGAMMA_GAMMA_HELPER_H
#define LIBGAMMA_GAMMA_HELPER_H
#include "libgamma-method.h"
/**
* Gamma ramp structure union for different depths.
*/
typedef union libgamma_gamma_ramps_any
{
/**
* 8-bit gamma ramps.
*/
libgamma_gamma_ramps8_t bits8;
/**
* 16-bit gamma ramps.
*/
libgamma_gamma_ramps16_t bits16;
/**
* 32-bit gamma ramps.
*/
libgamma_gamma_ramps32_t bits32;
/**
* 64-bit gamma ramps.
*/
libgamma_gamma_ramps64_t bits64;
/**
* Single precision float gamma ramps.
*/
libgamma_gamma_rampsf_t float_single;
/**
* Double precision float gamma ramps.
*/
libgamma_gamma_rampsd_t float_double;
} libgamma_gamma_ramps_any_t;
/**
* A function for reading the gamma ramps from a CRTC.
*
* @param this The CRTC state.
* @param ramps The store for the gamma ramps.
* @return Zero on success, otherwise (negative) the value of an
* error identifier provided by this library.
*/
typedef int libgamma_get_ramps_any_fun(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps_any_t* restrict ramps);
/**
* A function for writing the gamma ramps to a CRTC.
*
* @param this The CRTC state.
* @param ramps The gamma ramps.
* @return Zero on success, otherwise (negative) the value of an
* error identifier provided by this library.
*/
typedef int libgamma_set_ramps_any_fun(libgamma_crtc_state_t* restrict this,
libgamma_gamma_ramps_any_t ramps);
/**
* Get the current gamma ramps for a CRTC, re-encoding versio.n
*
* @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.
*/
#define libgamma_translated_ramp_get(this, ramps, depth_user, depth_system, fun) \
libgamma_translated_ramp_get_(this, ramps, depth_user, depth_system, \
(libgamma_get_ramps_any_fun*)(fun))
/**
* 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.
*/
#define libgamma_translated_ramp_set(this, ramps, depth_user, depth_system, fun) \
libgamma_translated_ramp_set_(this, ramps, depth_user, depth_system, \
(libgamma_set_ramps_any_fun*)(fun))
/**
* Get the current 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);
/**
* 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);
#endif
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