gistfile1.m

//
//  AppDelegate.m
//  MouseTest
//
//  Created by Seth Willits on 1/30/14.
//  Copyright (c) 2014 Araelium Group. All rights reserved.
//

#import "AppDelegate.h"



#define dispatch_after_s(secs, queue, block) dispatch_after(dispatch_time(DISPATCH_TIME_NOW, secs * NSEC_PER_SEC), queue, block)
#define QMAIN dispatch_get_main_queue()



@implementation AppDelegate
{
	CGDisplayModeRef oldMode;
	CGDisplayModeRef newMode;
}



- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
	oldMode = CGDisplayCopyDisplayMode(CGMainDisplayID());
	newMode = QZ_BestMode(32, 1280, 960); //!!!!!!!!!!!!!!!!!!!!!! pick a display size your screen supports
	
	
	dispatch_after_s(2.0, QMAIN, ^{
		CGError error = CGDisplaySetDisplayMode(CGMainDisplayID(), newMode, NULL);
		if (error) NSLog(@"%d", error);
		
		CGSetDisplayTransferByFormula(CGMainDisplayID(), 0.0, 1.0, 0.5, 0.0, 1.0, 0.5, 0.0, 1.0, 0.5);
	});
	
}


- (void)applicationWillTerminate:(NSNotification *)notification
{
	CGDisplaySetDisplayMode(CGMainDisplayID(), oldMode, NULL);
}



CGDisplayModeRef QZ_BestMode(const int bpp, const int w, const int h)
{
    CGDisplayModeRef best = NULL;
	
    if (bpp == 0) {
        return NULL;
    }
	
	/* apparently, we have to roll our own now. :/ */
	CFArrayRef mode_list = CGDisplayCopyAllDisplayModes(CGMainDisplayID(), NULL);
	if (mode_list != NULL) {
		const CFIndex num_modes = CFArrayGetCount(mode_list);
		CFIndex i;
		for (i = 0; i < num_modes; i++) {
			CGDisplayModeRef vidmode = (CGDisplayModeRef)CFArrayGetValueAtIndex(mode_list, i);
			
			CFStringRef fmt = CGDisplayModeCopyPixelEncoding(vidmode);
			int thisw = (int)CGDisplayModeGetWidth(vidmode);
			int thish = (int)CGDisplayModeGetHeight(vidmode);
			int thisbpp = 0;
			
			
			/* we only care about the 32-bit modes... */
			if (CFStringCompare(fmt, CFSTR(IO32BitDirectPixels),
								kCFCompareCaseInsensitive) == kCFCompareEqualTo) {
				thisbpp = 32;
			}
			
			CFRelease(fmt);
			
			
			/* We only care about exact matches, apparently. */
			if ((thisbpp == bpp) && (thisw == w) && (thish == h)) {
				best = vidmode;
				break;  /* got it! */
			}
		}
		CGDisplayModeRetain((CGDisplayModeRef) best);  /* NULL is ok */
		CFRelease(mode_list);
	}
	
	return best;
}


@end