68 lines
1.8 KiB
Objective-C
68 lines
1.8 KiB
Objective-C
/*
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* This file is part of the SDWebImage package.
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* (c) Olivier Poitrey <rs@dailymotion.com>
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*
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* Created by james <https://github.com/mystcolor> on 9/28/11.
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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#import <Foundation/Foundation.h>
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#import "SDWebImageCompat.h"
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@protocol SDWebImageDecoderDelegate;
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/**
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* Decoding image data is the most expensive step, and it is performed on the main thread. SDWebImageDecoder force the
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* image decoding in a separate thread so UIImage will have high chance to reuse the cached result when used by UI in
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* the main thread.
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*
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* @see https://github.com/rs/SDWebImage/pull/18
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*/
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@interface SDWebImageDecoder : NSObject
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{
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NSOperationQueue *imageDecodingQueue;
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}
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/**
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* Returns a shared global instance of image decoder
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*
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* @return An SDWebImageDecoder shared instance
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*/
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+ (SDWebImageDecoder *)sharedImageDecoder;
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/**
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* Pre-decode a given image in a separate thread.
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*
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* @param image The image to pre-decode
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* @param delegate The object to notify once pre-decoding is completed
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* @param info A user info object
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*/
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- (void)decodeImage:(UIImage *)image withDelegate:(id <SDWebImageDecoderDelegate>)delegate userInfo:(NSDictionary *)info;
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@end
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/**
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* Delegate protocol for SDWebImageDecoder
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*/
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@protocol SDWebImageDecoderDelegate <NSObject>
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/**
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* Called when pre-decoding is completed
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*
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* @param decoder The image decoder instance
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* @param image The pre-decoded image
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* @param userInfo the provided user info dictionary
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*/
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- (void)imageDecoder:(SDWebImageDecoder *)decoder didFinishDecodingImage:(UIImage *)image userInfo:(NSDictionary *)userInfo;
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@end
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@interface UIImage (ForceDecode)
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+ (UIImage *)decodedImageWithImage:(UIImage *)image;
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@end
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