53 lines
2.0 KiB
Objective-C
53 lines
2.0 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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* 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 "SDWebImageCompat.h"
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/**
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UIImage category about force decode feature (avoid Image/IO's lazy decoding during rendering behavior).
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*/
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@interface UIImage (ForceDecode)
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/**
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A bool value indicating whether the image has already been decoded. This can help to avoid extra force decode.
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Force decode is used for 2 cases:
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-- 1. for ImageIO created image (via `CGImageCreateWithImageSource` SPI), it's lazy and we trigger the decode before rendering
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-- 2. for non-ImageIO created image (via `CGImageCreate` API), we can ensure it's alignment is suitable to render on screen without copy by CoreAnimation
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@note For coder plugin developer, always use the SDImageCoderHelper's `colorSpaceGetDeviceRGB`/`preferredPixelFormat` to create CGImage.
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@note For more information why force decode, see: https://github.com/path/FastImageCache#byte-alignment
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@note From v5.17.0, the default value is always NO. Use `SDImageForceDecodePolicy` to control complicated policy.
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*/
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@property (nonatomic, assign) BOOL sd_isDecoded;
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/**
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Decode the provided image. This is useful if you want to force decode the image before rendering to improve performance.
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@param image The image to be decoded
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@return The decoded image
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*/
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+ (nullable UIImage *)sd_decodedImageWithImage:(nullable UIImage *)image;
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/**
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Decode and scale down the provided image
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@param image The image to be decoded
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@return The decoded and scaled down image
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*/
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+ (nullable UIImage *)sd_decodedAndScaledDownImageWithImage:(nullable UIImage *)image;
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/**
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Decode and scale down the provided image with limit bytes
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@param image The image to be decoded
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@param bytes The limit bytes size. Provide 0 to use the build-in limit.
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@return The decoded and scaled down image
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*/
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+ (nullable UIImage *)sd_decodedAndScaledDownImageWithImage:(nullable UIImage *)image limitBytes:(NSUInteger)bytes;
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@end
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