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UIColor-RGBA.mm
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UIColor-RGBA.mm
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/* $NoKeywords: $ */
/*
//
// Copyright (c) 1993-2011 Robert McNeel & Associates. All rights reserved.
// Portions Copyright (C) 2009 Apple Inc. All Rights Reserved.
// Rhinoceros is a registered trademark of Robert McNeel & Assoicates.
//
// THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY.
// ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AND OF
// MERCHANTABILITY ARE HEREBY DISCLAIMED.
//
// For complete openNURBS copyright information see <http://www.opennurbs.org>.
//
////////////////////////////////////////////////////////////////
*/
#import "UIColor-RGBA.h"
@implementation UIColor (RGBA)
- (CGColorSpaceModel) colorSpaceModel
{
return CGColorSpaceGetModel(CGColorGetColorSpace(self.CGColor));
}
- (NSString *) colorSpaceString
{
switch ([self colorSpaceModel])
{
case kCGColorSpaceModelUnknown:
return @"kCGColorSpaceModelUnknown";
case kCGColorSpaceModelMonochrome:
return @"kCGColorSpaceModelMonochrome";
case kCGColorSpaceModelRGB:
return @"kCGColorSpaceModelRGB";
case kCGColorSpaceModelCMYK:
return @"kCGColorSpaceModelCMYK";
case kCGColorSpaceModelLab:
return @"kCGColorSpaceModelLab";
case kCGColorSpaceModelDeviceN:
return @"kCGColorSpaceModelDeviceN";
case kCGColorSpaceModelIndexed:
return @"kCGColorSpaceModelIndexed";
case kCGColorSpaceModelPattern:
return @"kCGColorSpaceModelPattern";
default:
return @"Not a valid color space";
}
}
- (BOOL) canProvideRGBComponents
{
return (([self colorSpaceModel] == kCGColorSpaceModelRGB) ||
([self colorSpaceModel] == kCGColorSpaceModelMonochrome));
}
- (CGFloat) red
{
NSAssert (self.canProvideRGBComponents, @"Must be a RGB color to use -red, -green, -blue");
const CGFloat *c = CGColorGetComponents(self.CGColor);
return c[0];
}
- (CGFloat) green
{
NSAssert (self.canProvideRGBComponents, @"Must be a RGB color to use -red, -green, -blue");
const CGFloat *c = CGColorGetComponents(self.CGColor);
if ([self colorSpaceModel] == kCGColorSpaceModelMonochrome) return c[0];
return c[1];
}
- (CGFloat) blue
{
NSAssert (self.canProvideRGBComponents, @"Must be a RGB color to use -red, -green, -blue");
const CGFloat *c = CGColorGetComponents(self.CGColor);
if ([self colorSpaceModel] == kCGColorSpaceModelMonochrome) return c[0];
return c[2];
}
- (CGFloat) alpha
{
const CGFloat *c = CGColorGetComponents(self.CGColor);
return c[CGColorGetNumberOfComponents(self.CGColor)-1];
}
@end