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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_CALIBRATOR_H
#define CRT_CALIBRATOR_CALIBRATOR_H
#include "framebuffer.h"
#include "drmgamma.h"
#include <stdint.h>
#include <stddef.h>
#include <stdio.h>
/**
* Draw bars in different shades of grey, red, green and blue
* used for calibrating the contrast and brightness
*/
void draw_contrast_brightness(void);
/**
* Draw a seven segment display
*
* @param fb The framebuffer to draw on
* @param colour The intensity of the least intense colour to use
* @param x The X component of the top left corner of the seven segment display
* @param y The Y component of the top left corner of the seven segment display
*/
void draw_digit(framebuffer_t* restrict fb, int colour, uint32_t x, uint32_t y);
/**
* Manipulate a CRT controllers gamma ramps to display a specific digit
* for one of the seven segment display on only that CRT controller's
* monitors
*
* @param crtc The CRT controller information
* @param colour The intensity of the least intense colour in the seven segment display
* @param value The valud of the digit to display
*/
void gamma_digit(drm_crtc_t* restrict crtc, int colour, size_t value);
/**
* Draw an unique index on each monitor
*
* @return Zero on success, -1 on error
*/
int draw_id(void);
/**
* Draw squares used as reference when tweeking the gamma correction
*/
void draw_gamma(void);
/**
* Print a pattern on the screen that can be used when
* calibrating the convergence
*/
void draw_convergence(void);
/**
* Print a pattern on the screen that can be used when
* calibrating the moiré cancellation
*
* @param gap The horizontal and vertical gap, in pixels, between the dots
* @param diagonal Whether to draw dots in a diagonal pattern
*/
void draw_moire(uint32_t gap, int diagonal);
/**
* Analyse the monitors calibrations
*
* @return Zero on success, -1 on error
*/
int read_calibs(void);
/**
* Apply the selected calibrations to the monitors
*
* @return Zero on success, -1 on error
*/
int apply_calibs(void);
/**
* Print calibrations into a file
*
* @param f The file
* @return Zero on success, -1 on error
*/
int save_calibs(FILE* f);
#endif
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