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/**
* libgamma -- Display server abstraction layer for gamma ramp adjustments
* Copyright (C) 2014, 2015 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_TEST_RAMPS_H
#define LIBGAMMA_TEST_RAMPS_H
#include <stdint.h>
#ifndef __GCC__
# define __attribute__(x)
#endif
/**
* X macros of all integer gamma ramps
*/
#define LIST_INTEGER_RAMPS X(ramps8) X(ramps32) X(ramps64) X(ramps16)
/**
* X macros of all floating-point gamma ramps
*/
#define LIST_FLOAT_RAMPS X(rampsf) X(rampsd)
/**
* X macros of all gamma ramps
*/
#define LIST_RAMPS LIST_FLOAT_RAMPS LIST_INTEGER_RAMPS
/* ramps16 is last because we want to make sure that the gamma ramps are
preserved exactly on exit, and we assume RandR X is used. */
/**
* Test mapping function from [0, 1] float encoding value to [0, 2⁸ − 1] integer output value.
*
* @param encoding [0, 1] float encoding value.
* @return [0, 2⁸ − 1] integer output value.
*/
uint8_t invert_ramps8(float encoding) __attribute__((const));
/**
* Test mapping function from [0, 1] float encoding value to [0, 2¹⁶ − 1] integer output value.
*
* @param encoding [0, 1] float encoding value.
* @return [0, 2¹⁶ − 1] integer output value.
*/
uint16_t invert_ramps16(float encoding) __attribute__((const));
/**
* Test mapping function from [0, 1] float encoding value to [0, 2³² − 1] integer output value.
*
* @param encoding [0, 1] float encoding value.
* @return [0, 2³² − 1] integer output value.
*/
uint32_t invert_ramps32(float encoding) __attribute__((const));
/**
* Test mapping function from [0, 1] float encoding value to [0, 2⁶⁴ − 1] integer output value.
*
* @param encoding [0, 1] float encoding value.
* @return [0, 2⁶⁴ − 1] integer output value.
*/
uint64_t invert_ramps64(float encoding) __attribute__((const));
/**
* Test mapping function from [0, 1] float encoding value to [0, 1] float output value.
*
* @param encoding [0, 1] float encoding value.
* @return [0, 1] float output value.
*/
float invert_rampsf(float encoding) __attribute__((const));
/**
* Test mapping function from [0, 1] double precision float encoding
* value to [0, 1] double precision float output value.
*
* @param encoding [0, 1] float encoding value.
* @return [0, 1] float output value.
*/
double invert_rampsd(double encoding) __attribute__((const));
#endif
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