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Merge pull request #2136 from dreampiggy/fix_storeImage_nil_data_format 

When store image with no data for SDImageCache, check whether it contains alpha to use PNG or JPEG format
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DreamPiggy 2017-12-20 00:03:22 +08:00 committed by GitHub
parent bfe92374d0 2872f94a3a
commit 47c1248a1b
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1 changed files with 8 additions and 2 deletions
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10
SDWebImage/SDImageCache.m
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@ -217,8 +217,14 @@ FOUNDATION_STATIC_INLINE NSUInteger SDCacheCostForImage(UIImage *image) {
@autoreleasepool {
NSData *data = imageData;
if (!data && image) {
// If we do not have any data to detect image format, use PNG format
data = [[SDWebImageCodersManager sharedInstance] encodedDataWithImage:image format:SDImageFormatPNG];
// If we do not have any data to detect image format, check whether it contains alpha channel to use PNG or JPEG format
SDImageFormat format;
if (SDCGImageRefContainsAlpha(image.CGImage)) {
format = SDImageFormatPNG;
} else {
format = SDImageFormatJPEG;
}
data = [[SDWebImageCodersManager sharedInstance] encodedDataWithImage:image format:format];
}
[self storeImageDataToDisk:data forKey:key];
}