path: root/src/blueshift_w32gdi_c.h

/**
 * 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/>.
 */
#include <stdio.h>
#include <stdlib.h>

#ifndef WINVER
# define WINVER  0x0500
#endif
#ifdef FAKE_W32GDI
#  include "fake-w32gdi.h"
#else
#  include <windows.h>
#  include <wingdi.h>
#endif



/**
 * The size of gamma ramps
 */
#define GAMMA_RAMP_SIZE  256



/**
 * Start stage of colour curve control
 * 
 * @return  Zero on success
 */
int blueshift_w32gdi_open(void);

/**
 * Get the number of CRTC:s on the system
 * 
 * @return  The number of CRTC:s on the system
 */
int blueshift_w32gdi_crtc_count(void);

/**
 * Gets the current colour curves
 * 
 * @param   use_crtc  The CRTC to use
 * @return            {the size of the each curve, *the red curve,
 *                    *the green curve, *the blue curve},
 *                    needs to be free:d. `NULL` on error.
 */
uint16_t* blueshift_w32gdi_read(int use_crtc);

/**
 * Apply stage of colour curve control
 * 
 * @param   use_crtc   The CRTC to use, -1 for all
 * @param   rgb_curve  The concatenation of the red, the green and the blue colour curves
 * @return             Zero on success
 */
int blueshift_w32gdi_apply(int use_crtc, uint16_t* rgb_curves);

/**
 * Resource freeing stage of colour curve control
 */
void blueshift_w32gdi_close(void);