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Filtrr - An iOS Image filter library based on Alex Michael's filtrr.js (https://github.com/alexmic/filtrr) At this point thousand thanks to Alex for sharing. If you like this, like us on Facebook :) http://www.facebook.com/WeAre42dp and feel free to join the iOS developer group on Facebook: http://www.facebook.com/groups/130540617023687/ Copyright (C) 2012 42dp Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. How to use ----------- This is pretty simple: 1. a) #import "UIImage+FiltrrCompositions.h" if you want to use the predefined effects or b) #import "UIImage+Filtrr.h" if you want to compose your own effects 2a) Just call the method on your image and you will get back a manipulated image. UIImage *img = [UIImage imageNamed:@"test.jpg"]; img = [img e1]; anImageViewController.image = img; 2b) To compose your own effect: UIImage *img = [UIImage imageNamed:@"test.jpg"]; UIImage *topImage = [img duplicate]; topImage = [[topImage saturationByFactor:0] blur]; img = [self multiply:topImage]; RGBA minrgb, maxrgb; minrgb = RGBAMake(60, 35, 10, 255); maxrgb = RGBAMake(170, 140, 160, 255); img = [[[self tintWithMinRGB:minrgb MaxRGB:maxrgb] contrastByFactor:0.8] brightnessByFactor:10]; anImageViewController.image = img; Enjoy it and feel free to send me your composed effects!