46 строки
1.2 KiB
Objective-C
46 строки
1.2 KiB
Objective-C
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT 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 <React/RCTGIFImageDecoder.h>
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#import <ImageIO/ImageIO.h>
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#import <QuartzCore/QuartzCore.h>
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#import <React/RCTUtils.h>
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#import <React/RCTAnimatedImage.h>
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@implementation RCTGIFImageDecoder
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RCT_EXPORT_MODULE()
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- (BOOL)canDecodeImageData:(NSData *)imageData
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{
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char header[7] = {};
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[imageData getBytes:header length:6];
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return !strcmp(header, "GIF87a") || !strcmp(header, "GIF89a");
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}
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- (RCTImageLoaderCancellationBlock)decodeImageData:(NSData *)imageData
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size:(CGSize)size
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scale:(CGFloat)scale
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resizeMode:(RCTResizeMode)resizeMode
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completionHandler:(RCTImageLoaderCompletionBlock)completionHandler
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{
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RCTAnimatedImage *image = [[RCTAnimatedImage alloc] initWithData:imageData scale:scale];
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if (!image) {
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completionHandler(nil, nil);
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return ^{};
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}
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completionHandler(nil, image);
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return ^{};
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}
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@end
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