CIFunHouse/Custom Filters/TiltShift.m
/* |
File: TiltShift.m |
Abstract: |
Version: 1.0 |
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple |
Inc. ("Apple") in consideration of your agreement to the following |
terms, and your use, installation, modification or redistribution of |
this Apple software constitutes acceptance of these terms. If you do |
not agree with these terms, please do not use, install, modify or |
redistribute this Apple software. |
In consideration of your agreement to abide by the following terms, and |
subject to these terms, Apple grants you a personal, non-exclusive |
license, under Apple's copyrights in this original Apple software (the |
"Apple Software"), to use, reproduce, modify and redistribute the Apple |
Software, with or without modifications, in source and/or binary forms; |
provided that if you redistribute the Apple Software in its entirety and |
without modifications, you must retain this notice and the following |
text and disclaimers in all such redistributions of the Apple Software. |
Neither the name, trademarks, service marks or logos of Apple Inc. may |
be used to endorse or promote products derived from the Apple Software |
without specific prior written permission from Apple. Except as |
expressly stated in this notice, no other rights or licenses, express or |
implied, are granted by Apple herein, including but not limited to any |
patent rights that may be infringed by your derivative works or by other |
works in which the Apple Software may be incorporated. |
The Apple Software is provided by Apple on an "AS IS" basis. APPLE |
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION |
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS |
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND |
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS. |
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL |
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, |
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED |
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), |
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE |
POSSIBILITY OF SUCH DAMAGE. |
Copyright (C) 2013 Apple Inc. All Rights Reserved. |
*/ |
#if TARGET_OS_IPHONE |
#import <CoreImage/CoreImage.h> |
#else |
#import <QuartzCore/QuartzCore.h> |
#endif |
@interface TiltShift : CIFilter |
{ |
CIImage *inputImage; |
NSNumber *inputRadius; |
} |
@property (retain, nonatomic) CIImage *inputImage; |
@property (copy, nonatomic) NSNumber *inputRadius; |
@end |
@implementation TiltShift |
@synthesize inputImage; |
@synthesize inputRadius; |
+ (NSDictionary *)customAttributes |
{ |
return @{ |
kCIAttributeFilterDisplayName : |
@"Tilt Shift", |
kCIAttributeFilterCategories : |
@[kCICategoryBlur, kCICategoryVideo, kCICategoryInterlaced, kCICategoryNonSquarePixels, kCICategoryStillImage], |
@"inputRadius" : |
@{ |
kCIAttributeMin : @0.0, |
kCIAttributeSliderMin : @0.0, |
kCIAttributeSliderMax : @30.0, |
kCIAttributeDefault : @10.0, |
kCIAttributeIdentity : @0.0, |
kCIAttributeType : kCIAttributeTypeScalar |
} |
}; |
} |
- (void)setDefaults |
{ |
self.inputRadius = @10.0; |
} |
- (CIImage *)outputImage |
{ |
if ( [inputRadius floatValue] < 0.16f ) // if radius is too small to have any effect just return input image |
return inputImage; |
CIImage *blurredImage = [[[CIFilter filterWithName:@"CIGaussianBlur" keysAndValues:@"inputRadius", inputRadius, kCIInputImageKey, inputImage, nil] valueForKey:kCIOutputImageKey] imageByCroppingToRect:[inputImage extent]]; |
CGFloat h = [inputImage extent].size.height; |
CIColor *opaqueGreen = [CIColor colorWithRed:0.0 green:1.0 blue:0.0 alpha:1.0]; |
CIColor *transparentGreen = [CIColor colorWithRed:0.0 green:1.0 blue:0.0 alpha:0.0]; |
CIImage *gradient0 = [[CIFilter filterWithName:@"CILinearGradient" keysAndValues: |
@"inputPoint0", [CIVector vectorWithX:0.0 Y:h*0.75], |
@"inputPoint1", [CIVector vectorWithX:0.0 Y:h*0.50], |
@"inputColor0", opaqueGreen, |
@"inputColor1", transparentGreen, nil] valueForKey:kCIOutputImageKey]; |
CIImage *gradient1 = [[CIFilter filterWithName:@"CILinearGradient" keysAndValues: |
@"inputPoint0", [CIVector vectorWithX:0.0 Y:h*0.25], |
@"inputPoint1", [CIVector vectorWithX:0.0 Y:h*0.50], |
@"inputColor0", opaqueGreen, |
@"inputColor1", transparentGreen, nil] valueForKey:kCIOutputImageKey]; |
CIImage *maskImage = [[CIFilter filterWithName:@"CIAdditionCompositing" keysAndValues: |
kCIInputImageKey, gradient0, kCIInputBackgroundImageKey, gradient1, |
nil] valueForKey:kCIOutputImageKey]; |
return [[CIFilter filterWithName:@"CIBlendWithMask" keysAndValues: |
kCIInputImageKey, blurredImage, |
@"inputMaskImage", maskImage, |
@"inputBackgroundImage", inputImage, nil] |
valueForKey:kCIOutputImageKey]; |
} |
@end |
Copyright © 2013 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2013-06-13