//
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// YYSpriteImage.m
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// YYImage <https://github.com/ibireme/YYImage>
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//
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// Created by ibireme on 15/4/21.
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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 "YYSpriteSheetImage.h"
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@implementation YYSpriteSheetImage
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- (instancetype)initWithSpriteSheetImage:(UIImage *)image
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contentRects:(NSArray *)contentRects
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frameDurations:(NSArray *)frameDurations
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loopCount:(NSUInteger)loopCount {
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if (!image.CGImage) return nil;
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if (contentRects.count < 1 || frameDurations.count < 1) return nil;
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if (contentRects.count != frameDurations.count) return nil;
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self = [super initWithCGImage:image.CGImage scale:image.scale orientation:image.imageOrientation];
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if (!self) return nil;
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_contentRects = contentRects.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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- (CGRect)contentsRectForCALayerAtIndex:(NSUInteger)index {
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CGRect layerRect = CGRectMake(0, 0, 1, 1);
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if (index >= _contentRects.count) return layerRect;
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CGSize imageSize = self.size;
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CGRect rect = [self animatedImageContentsRectAtIndex:index];
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if (imageSize.width > 0.01 && imageSize.height > 0.01) {
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layerRect.origin.x = rect.origin.x / imageSize.width;
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layerRect.origin.y = rect.origin.y / imageSize.height;
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layerRect.size.width = rect.size.width / imageSize.width;
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layerRect.size.height = rect.size.height / imageSize.height;
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layerRect = CGRectIntersection(layerRect, CGRectMake(0, 0, 1, 1));
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if (CGRectIsNull(layerRect) || CGRectIsEmpty(layerRect)) {
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layerRect = CGRectMake(0, 0, 1, 1);
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}
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}
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return layerRect;
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}
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#pragma mark @protocol YYAnimatedImage
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- (NSUInteger)animatedImageFrameCount {
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return _contentRects.count;
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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 0;
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}
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- (UIImage *)animatedImageFrameAtIndex:(NSUInteger)index {
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return self;
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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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return ((NSNumber *)_frameDurations[index]).doubleValue;
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}
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- (CGRect)animatedImageContentsRectAtIndex:(NSUInteger)index {
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if (index >= _contentRects.count) return CGRectZero;
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return ((NSValue *)_contentRects[index]).CGRectValue;
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}
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@end
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