/*
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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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* 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 "SDImageCoder.h"
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/**
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This is the abstract class for all animated coder, which use the Image/IO API. You can not use this directly as real coders. A exception will be raised if you use this class.
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All of the properties need the subclass to implement and works as expected.
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For Image/IO, See Apple's documentation: https://developer.apple.com/documentation/imageio
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*/
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@interface SDImageIOAnimatedCoder : NSObject <SDProgressiveImageCoder, SDAnimatedImageCoder>
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#pragma mark - Subclass Override
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/**
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The supported animated image format. Such as `SDImageFormatGIF`.
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@note Subclass override.
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*/
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@property (class, readonly) SDImageFormat imageFormat;
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/**
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The supported image format UTI Type. Such as `kSDUTTypeGIF`.
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This can be used for cases when we can not detect `SDImageFormat. Such as progressive decoding's hint format `kCGImageSourceTypeIdentifierHint`.
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@note Subclass override.
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*/
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@property (class, readonly, nonnull) NSString *imageUTType;
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/**
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The image container property key used in Image/IO API. Such as `kCGImagePropertyGIFDictionary`.
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@note Subclass override.
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*/
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@property (class, readonly, nonnull) NSString *dictionaryProperty;
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/**
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The image unclamped delay time property key used in Image/IO API. Such as `kCGImagePropertyGIFUnclampedDelayTime`
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@note Subclass override.
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*/
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@property (class, readonly, nonnull) NSString *unclampedDelayTimeProperty;
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/**
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The image delay time property key used in Image/IO API. Such as `kCGImagePropertyGIFDelayTime`.
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@note Subclass override.
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*/
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@property (class, readonly, nonnull) NSString *delayTimeProperty;
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/**
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The image loop count property key used in Image/IO API. Such as `kCGImagePropertyGIFLoopCount`.
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@note Subclass override.
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*/
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@property (class, readonly, nonnull) NSString *loopCountProperty;
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/**
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The default loop count when there are no any loop count information inside image container metadata.
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For example, for GIF format, the standard use 1 (play once). For APNG format, the standard use 0 (infinity loop).
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@note Subclass override.
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*/
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@property (class, readonly) NSUInteger defaultLoopCount;
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@end
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