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| // | |||
| // UIImage+MTTiling.h | |||
| // PSFoundation | |||
| // | |||
| // Created by Matthias Tretter on 15.03.11. | |||
| // Copyright 2011 @myell0w. All rights reserved. | |||
| // | |||
| // Taken from: | |||
| // http://www.cimgf.com/2011/03/01/subduing-catiledlayer/ | |||
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| #import <Foundation/Foundation.h> | |||
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| @interface UIImage (MTTiling) | |||
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| - (void)saveTilesOfSize:(CGSize)size | |||
| toDirectory:(NSString*)directoryPath | |||
| usingPrefix:(NSString*)prefix; | |||
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| @end | |||
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| // | |||
| // UIImage+MTTiling.m | |||
| // PSFoundation | |||
| // | |||
| // Created by Matthias Tretter on 15.03.11. | |||
| // Copyright 2011 Peter Steinberger. All rights reserved. | |||
| // | |||
| // Taken from: | |||
| // http://www.cimgf.com/2011/03/01/subduing-catiledlayer/ | |||
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| #import "UIImage+MTTiling.h" | |||
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| @implementation UIImage (MTTiling) | |||
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| - (void)saveTilesOfSize:(CGSize)size | |||
| toDirectory:(NSString*)directoryPath | |||
| usingPrefix:(NSString*)prefix | |||
| { | |||
| CGFloat cols = [self size].width / size.width; | |||
| CGFloat rows = [self size].height / size.height; | |||
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| int fullColumns = floorf(cols); | |||
| int fullRows = floorf(rows); | |||
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| CGFloat remainderWidth = [self size].width - (fullColumns * size.width); | |||
| CGFloat remainderHeight = [self size].height - (fullRows * size.height); | |||
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| if (cols > fullColumns) fullColumns++; | |||
| if (rows > fullRows) fullRows++; | |||
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| CGImageRef fullImage = [self CGImage]; | |||
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| for (int y = 0; y < fullRows; ++y) { | |||
| for (int x = 0; x < fullColumns; ++x) { | |||
| CGSize tileSize = size; | |||
| if (x + 1 == fullColumns && remainderWidth > 0) { | |||
| // Last column | |||
| tileSize.width = remainderWidth; | |||
| } | |||
| if (y + 1 == fullRows && remainderHeight > 0) { | |||
| // Last row | |||
| tileSize.height = remainderHeight; | |||
| } | |||
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| CGImageRef tileImage = CGImageCreateWithImageInRect(fullImage, | |||
| (CGRect){{x*size.width, y*size.height}, | |||
| tileSize}); | |||
| NSData *imageData = UIImagePNGRepresentation([UIImage imageWithCGImage:tileImage]); | |||
| NSString *path = [NSString stringWithFormat:@"%@/%@%d_%d.png", | |||
| directoryPath, prefix, x, y]; | |||
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| [imageData writeToFile:path atomically:NO]; | |||
| } | |||
| } | |||
| } | |||
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| @end | |||
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