path: root/src/fake_quartz.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/>.
 */
#ifndef BLUESHIFT_FAKE_QUARTZ_H
#define BLUESHIFT_FAKE_QUARTZ_H


/* This header file contains some capabilities of
   <CoreGraphics/CGDirectDisplay.h> and <CoreGraphics/CGError.h>,
   and can be used modify gamma ramps without Mac OS X and Quartz
   but with its API.
   
   The content of this file is based on the documentation found on:
   
   https://developer.apple.com/library/mac/documentation/GraphicsImaging/Reference/Quartz_Services_Ref/Reference/reference.html
   
   https://developer.apple.com/library/mac/documentation/CoreGraphics/Reference/CoreGraphicsConstantsRef/Reference/reference.html#//apple_ref/c/tdef/CGError
*/


#include <stdint.h>


typedef int32_t CGError;
#define kCGErrorSuccess 0

typedef float CGGammaValue;
typedef uint32_t CGDirectDisplayID;


CGError CGGetActiveDisplayList(uint32_t max_size, CGDirectDisplayID* displays_out, uint32_t* count_out);

CGError CGSetDisplayTransferByTable(CGDirectDisplayID display, uint32_t gamma_size, const CGGammaValue* red,
				    const CGGammaValue* green, const CGGammaValue* blue);

CGError CGGetDisplayTransferByTable(CGDirectDisplayID display, uint32_t gamma_size, CGGammaValue* red,
				    CGGammaValue* green, CGGammaValue* blue, uint32_t *gamma_size_out);

void CGDisplayRestoreColorSyncSettings(void);

uint32_t CGDisplayGammaTableCapacity(CGDirectDisplayID display);


#endif