NSColor+UKBrightenDarken.m

//
//  NSColor+UKBrightenDarken.m
//  UKBorderlessWidgetizedWindow
//
//  Created by Uli Kusterer on 27.10.09.
//  Copyright 2009 Uli Kusterer.
//
//	This software is provided 'as-is', without any express or implied
//	warranty. In no event will the authors be held liable for any damages
//	arising from the use of this software.
//
//	Permission is granted to anyone to use this software for any purpose,
//	including commercial applications, and to alter it and redistribute it
//	freely, subject to the following restrictions:
//
//	   1. The origin of this software must not be misrepresented; you must not
//	   claim that you wrote the original software. If you use this software
//	   in a product, an acknowledgment in the product documentation would be
//	   appreciated but is not required.
//
//	   2. Altered source versions must be plainly marked as such, and must not be
//	   misrepresented as being the original software.
//
//	   3. This notice may not be removed or altered from any source
//	   distribution.
//

#import "NSColor+UKBrightenDarken.h"


@implementation NSColor (UKBrightenDarken)

-(NSColor*)	brightenColorBy: (CGFloat)percentage
{
	NSColor*	hsbColor = [self colorUsingColorSpaceName: NSCalibratedRGBColorSpace];
	
	return [NSColor colorWithCalibratedHue: [hsbColor hueComponent] saturation: [hsbColor saturationComponent]
						brightness: [hsbColor brightnessComponent] +[hsbColor brightnessComponent] *percentage alpha: [hsbColor alphaComponent]];
}


-(NSColor*)	darkenColorBy: (CGFloat)percentage
{
	NSColor*	hsbColor = [self colorUsingColorSpaceName: NSCalibratedRGBColorSpace];
	
	return [NSColor colorWithCalibratedHue: [hsbColor hueComponent] saturation: [hsbColor saturationComponent]
						brightness: [hsbColor brightnessComponent] -[hsbColor brightnessComponent] *percentage alpha: [hsbColor alphaComponent]];
}

@end