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Merge pull request #3430 from dreampiggy/feat/add_is_thumbnail 

Added the helper convenient API `sd_isThumbnail`
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DreamPiggy 2022-11-08 22:42:00 +08:00 committed by GitHub
parent 03b46475eb bfa91a291b
commit 35b28d4179
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 22 additions and 11 deletions
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13
SDWebImage/Core/SDWebImageManager.m
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@ -489,19 +489,10 @@ static id<SDImageLoader> _defaultImageLoader;
shouldTransformImage = shouldTransformImage && (!originalImage.sd_isAnimated || (options & SDWebImageTransformAnimatedImage));
shouldTransformImage = shouldTransformImage && (!originalImage.sd_isVector || (options & SDWebImageTransformVectorImage));
// thumbnail check
CGSize thumbnailSize = CGSizeZero;
NSValue *thumbnailSizeValue = originalImage.sd_decodeOptions[SDImageCoderDecodeThumbnailPixelSize];
if (thumbnailSizeValue != nil) {
#if SD_MAC
thumbnailSize = thumbnailSizeValue.sizeValue;
#else
thumbnailSize = thumbnailSizeValue.CGSizeValue;
#endif
}
BOOL shouldEncodeThumbnail = thumbnailSize.width > 0 && thumbnailSize.height > 0;
BOOL isThumbnail = originalImage.sd_isThumbnail;
NSData *cacheData = originalData;
UIImage *cacheImage = originalImage;
if (shouldEncodeThumbnail) {
if (isThumbnail) {
cacheData = nil; // thumbnail don't store full size data
originalImage = nil; // thumbnail don't have full size image
}

6
SDWebImage/Core/UIImage+Metadata.h
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@ -71,6 +71,12 @@
*/
@property (nonatomic, assign) BOOL sd_isTransformed;
/**
A bool value indicating that the image is using thumbnail decode with smaller size, so the image data may not always match original download one.
@note This just check `sd_decodeOptions[.decodeThumbnailPixelSize] > CGSize.zero`
*/
@property (nonatomic, assign, readonly) BOOL sd_isThumbnail;
/**
A dictionary value contains the decode options when decoded from SDWebImage loading system (say, `SDImageCacheDecodeImageData/SDImageLoaderDecode[Progressive]ImageData`)
It may not always available and only image decoding related options will be saved. (including [.decodeScaleFactor, .decodeThumbnailPixelSize, .decodePreserveAspectRatio, .decodeFirstFrameOnly])

13
SDWebImage/Core/UIImage+Metadata.m
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@ -197,6 +197,19 @@
objc_setAssociatedObject(self, @selector(sd_decodeOptions), sd_decodeOptions, OBJC_ASSOCIATION_COPY_NONATOMIC);
}
-(BOOL)sd_isThumbnail {
CGSize thumbnailSize = CGSizeZero;
NSValue *thumbnailSizeValue = self.sd_decodeOptions[SDImageCoderDecodeThumbnailPixelSize];
if (thumbnailSizeValue != nil) {
#if SD_MAC
thumbnailSize = thumbnailSizeValue.sizeValue;
#else
thumbnailSize = thumbnailSizeValue.CGSizeValue;
#endif
}
return thumbnailSize.width > 0 && thumbnailSize.height > 0;
}
- (SDImageCoderOptions *)sd_decodeOptions {
SDImageCoderOptions *value = objc_getAssociatedObject(self, @selector(sd_decodeOptions));
if ([value isKindOfClass:NSDictionary.class]) {

1
SDWebImage/Private/SDAssociatedObject.m
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@ -18,6 +18,7 @@ void SDImageCopyAssociatedObject(UIImage * _Nullable source, UIImage * _Nullable
}
// Image Metadata
target.sd_isIncremental = source.sd_isIncremental;
target.sd_isTransformed = source.sd_isTransformed;
target.sd_decodeOptions = source.sd_decodeOptions;
target.sd_imageLoopCount = source.sd_imageLoopCount;
target.sd_imageFormat = source.sd_imageFormat;