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Add the support for embed thumbnail for JPEG/HEIF/AVIF

This commit is contained in:
DreamPiggy 2020-04-20 12:22:09 +08:00
parent 8d1d0b0802
commit f84678a44d
4 changed files with 19 additions and 0 deletions
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8
SDWebImage/Core/SDImageCoder.h
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@ -79,6 +79,14 @@ FOUNDATION_EXPORT SDImageCoderOption _Nonnull const SDImageCoderEncodeMaxPixelSi
*/
FOUNDATION_EXPORT SDImageCoderOption _Nonnull const SDImageCoderEncodeMaxFileSize;
/**
A Boolean value indicating the encoding format should contains a thumbnail image into the output data. Only some of image format (like JPEG/HEIF/AVIF) support this behavior. The embed thumbnail will be used during next time thumbnail decoding (provided `.thumbnailPixelSize`), which is faster than full image thumbnail decoding. (NSNumber)
Defaults to NO, which does not embed any thumbnail.
@note The thumbnail image's pixel size is not defined, the encoder can choose the proper pixel size which is suitable for encoding quality.
@note works for `SDImageCoder`
*/
FOUNDATION_EXPORT SDImageCoderOption _Nonnull const SDImageCoderEncodeEmbedThumbnail;
/**
A SDWebImageContext object which hold the original context options from top-level API. (SDWebImageContext)
This option is ignored for all built-in coders and take no effect.

1
SDWebImage/Core/SDImageCoder.m
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@ -18,5 +18,6 @@ SDImageCoderOption const SDImageCoderEncodeCompressionQuality = @"encodeCompress
SDImageCoderOption const SDImageCoderEncodeBackgroundColor = @"encodeBackgroundColor";
SDImageCoderOption const SDImageCoderEncodeMaxPixelSize = @"encodeMaxPixelSize";
SDImageCoderOption const SDImageCoderEncodeMaxFileSize = @"encodeMaxFileSize";
SDImageCoderOption const SDImageCoderEncodeEmbedThumbnail = @"encodeEmbedThumbnail";
SDImageCoderOption const SDImageCoderWebImageContext = @"webImageContext";

5
SDWebImage/Core/SDImageIOAnimatedCoder.m
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@ -484,6 +484,11 @@ static NSString * kSDCGImageDestinationRequestedFileSize = @"kCGImageDestination
// Remove the quality if we have file size limit
properties[(__bridge NSString *)kCGImageDestinationLossyCompressionQuality] = nil;
}
BOOL embedThumbnail = NO;
if (options[SDImageCoderEncodeEmbedThumbnail]) {
embedThumbnail = [options[SDImageCoderEncodeEmbedThumbnail] boolValue];
}
properties[(__bridge NSString *)kCGImageDestinationEmbedThumbnail] = @(embedThumbnail);
BOOL encodeFirstFrame = [options[SDImageCoderEncodeFirstFrameOnly] boolValue];
if (encodeFirstFrame || frames.count == 0) {

5
SDWebImage/Core/SDImageIOCoder.m
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@ -294,6 +294,11 @@ static NSString * kSDCGImageDestinationRequestedFileSize = @"kCGImageDestination
// Remove the quality if we have file size limit
properties[(__bridge NSString *)kCGImageDestinationLossyCompressionQuality] = nil;
}
BOOL embedThumbnail = NO;
if (options[SDImageCoderEncodeEmbedThumbnail]) {
embedThumbnail = [options[SDImageCoderEncodeEmbedThumbnail] boolValue];
}
properties[(__bridge NSString *)kCGImageDestinationEmbedThumbnail] = @(embedThumbnail);
// Add your image to the destination.
CGImageDestinationAddImage(imageDestination, imageRef, (__bridge CFDictionaryRef)properties);