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/**
* crt-calibrator – Calibration utility for CRT monitors
* Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
*
* 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/>.
*/
#ifndef CRT_CALIBRATOR_STATE_H
#define CRT_CALIBRATOR_STATE_H
#include "framebuffer.h"
#include "drmgamma.h"
#include <stddef.h>
/**
* The framebuffers on the system
*/
extern framebuffer_t* restrict framebuffers;
/**
* The number of elements in `framebuffers`
*/
extern size_t framebuffer_count;
/**
* The graphics cards on the system
*/
extern drm_card_t* restrict cards;
/**
* The number of elements in `cards`
*/
extern size_t card_count;
/**
* The connected CRT controllers on the system
*/
extern drm_crtc_t* restrict crtcs;
/**
* The software brightness setting on each connected CRT controller, on each channel
*/
extern double* restrict brightnesses[3];
/**
* The software contrast setting on each connected CRT controller, on each channel
*/
extern double* restrict contrasts[3];
/**
* The gamma correction on each connected CRT controller, on each channel
*/
extern double* restrict gammas[3];
/**
* The number of elements in `crtcs`, `brightnesses[]`, `contrasts[]` and `gammas[]`
*/
extern size_t crtc_count;
/**
* Acquire video control
*
* @return Zero on success, -1 on error
*/
int acquire_video(void);
/**
* Release video control
*/
void release_video(void);
#endif
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