//
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// YYFrameImage.m
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// YYImage <https://github.com/ibireme/YYImage>
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//
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// Created by ibireme on 14/12/9.
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// Copyright (c) 2015 ibireme.
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//
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// This source code is licensed under the MIT-style license found in the
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// LICENSE file in the root directory of this source tree.
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//
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#import "YYFrameImage.h"
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#import "YYImageCoder.h"
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/**
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Return the path scale.
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e.g.
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<table>
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<tr><th>Path </th><th>Scale </th></tr>
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<tr><td>"icon.png" </td><td>1 </td></tr>
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<tr><td>"icon@2x.png" </td><td>2 </td></tr>
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<tr><td>"icon@2.5x.png" </td><td>2.5 </td></tr>
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<tr><td>"icon@2x" </td><td>1 </td></tr>
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<tr><td>"icon@2x..png" </td><td>1 </td></tr>
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<tr><td>"icon@2x.png/" </td><td>1 </td></tr>
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</table>
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*/
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static CGFloat _NSStringPathScale(NSString *string) {
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if (string.length == 0 || [string hasSuffix:@"/"]) return 1;
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NSString *name = string.stringByDeletingPathExtension;
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__block CGFloat scale = 1;
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NSRegularExpression *pattern = [NSRegularExpression regularExpressionWithPattern:@"@[0-9]+\\.?[0-9]*x$" options:NSRegularExpressionAnchorsMatchLines error:nil];
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[pattern enumerateMatchesInString:name options:kNilOptions range:NSMakeRange(0, name.length) usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) {
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if (result.range.location >= 3) {
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scale = [string substringWithRange:NSMakeRange(result.range.location + 1, result.range.length - 2)].doubleValue;
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}
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}];
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return scale;
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}
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@implementation YYFrameImage {
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NSUInteger _loopCount;
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NSUInteger _oneFrameBytes;
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NSArray *_imagePaths;
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NSArray *_imageDatas;
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NSArray *_frameDurations;
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}
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- (instancetype)initWithImagePaths:(NSArray *)paths oneFrameDuration:(NSTimeInterval)oneFrameDuration loopCount:(NSUInteger)loopCount {
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NSMutableArray *durations = [NSMutableArray new];
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for (int i = 0, max = (int)paths.count; i < max; i++) {
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[durations addObject:@(oneFrameDuration)];
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}
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return [self initWithImagePaths:paths frameDurations:durations loopCount:loopCount];
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}
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- (instancetype)initWithImagePaths:(NSArray *)paths frameDurations:(NSArray *)frameDurations loopCount:(NSUInteger)loopCount {
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if (paths.count == 0) return nil;
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if (paths.count != frameDurations.count) return nil;
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NSString *firstPath = paths[0];
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NSData *firstData = [NSData dataWithContentsOfFile:firstPath];
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CGFloat scale = _NSStringPathScale(firstPath);
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UIImage *firstCG = [[[UIImage alloc] initWithData:firstData] yy_imageByDecoded];
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self = [self initWithCGImage:firstCG.CGImage scale:scale orientation:UIImageOrientationUp];
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if (!self) return nil;
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long frameByte = CGImageGetBytesPerRow(firstCG.CGImage) * CGImageGetHeight(firstCG.CGImage);
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_oneFrameBytes = (NSUInteger)frameByte;
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_imagePaths = paths.copy;
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_frameDurations = frameDurations.copy;
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_loopCount = loopCount;
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return self;
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}
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- (instancetype)initWithImageDataArray:(NSArray *)dataArray oneFrameDuration:(NSTimeInterval)oneFrameDuration loopCount:(NSUInteger)loopCount {
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NSMutableArray *durations = [NSMutableArray new];
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for (int i = 0, max = (int)dataArray.count; i < max; i++) {
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[durations addObject:@(oneFrameDuration)];
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}
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return [self initWithImageDataArray:dataArray frameDurations:durations loopCount:loopCount];
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}
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- (instancetype)initWithImageDataArray:(NSArray *)dataArray frameDurations:(NSArray *)frameDurations loopCount:(NSUInteger)loopCount {
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if (dataArray.count == 0) return nil;
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if (dataArray.count != frameDurations.count) return nil;
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NSData *firstData = dataArray[0];
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CGFloat scale = [UIScreen mainScreen].scale;
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UIImage *firstCG = [[[UIImage alloc] initWithData:firstData] yy_imageByDecoded];
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self = [self initWithCGImage:firstCG.CGImage scale:scale orientation:UIImageOrientationUp];
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if (!self) return nil;
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long frameByte = CGImageGetBytesPerRow(firstCG.CGImage) * CGImageGetHeight(firstCG.CGImage);
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_oneFrameBytes = (NSUInteger)frameByte;
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_imageDatas = dataArray.copy;
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_frameDurations = frameDurations.copy;
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_loopCount = loopCount;
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return self;
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}
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#pragma mark - YYAnimtedImage
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- (NSUInteger)animatedImageFrameCount {
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if (_imagePaths) {
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return _imagePaths.count;
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} else if (_imageDatas) {
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return _imageDatas.count;
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} else {
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return 1;
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}
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}
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- (NSUInteger)animatedImageLoopCount {
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return _loopCount;
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}
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- (NSUInteger)animatedImageBytesPerFrame {
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return _oneFrameBytes;
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}
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- (UIImage *)animatedImageFrameAtIndex:(NSUInteger)index {
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if (_imagePaths) {
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if (index >= _imagePaths.count) return nil;
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NSString *path = _imagePaths[index];
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CGFloat scale = _NSStringPathScale(path);
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NSData *data = [NSData dataWithContentsOfFile:path];
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return [[UIImage imageWithData:data scale:scale] yy_imageByDecoded];
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} else if (_imageDatas) {
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if (index >= _imageDatas.count) return nil;
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NSData *data = _imageDatas[index];
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return [[UIImage imageWithData:data scale:[UIScreen mainScreen].scale] yy_imageByDecoded];
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} else {
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return index == 0 ? self : nil;
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}
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}
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- (NSTimeInterval)animatedImageDurationAtIndex:(NSUInteger)index {
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if (index >= _frameDurations.count) return 0;
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NSNumber *num = _frameDurations[index];
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return [num doubleValue];
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}
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@end
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