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Share Extension: Use different image scaling approach to avoid memory-limit-exceeded crashes

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This commit is contained in:
Ilya Laktyushin 2019-10-20 23:38:05 +04:00
parent 8f070557fa
commit ee68b7b539
1 changed files with 37 additions and 10 deletions
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47
submodules/ShareItems/Sources/TGItemProviderSignals.m
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@ -198,16 +198,43 @@ static CGSize TGFitSize(CGSize size, CGSize maxSize) {
} else {
if ([(NSObject *)item respondsToSelector:@selector(absoluteString)]) {
NSURL *url = (NSURL *)item;
UIImage *image = [[UIImage alloc] initWithContentsOfFile:[url path]];
if (image != nil) {
UIImage *result = TGScaleImageToPixelSize(image, TGFitSize(image.size, maxSize));
NSData *resultData = UIImageJPEGRepresentation(result, 0.52f);
if (resultData != nil) {
[subscriber putNext:@{@"scaledImageData": resultData, @"scaledImageDimensions": [NSValue valueWithCGSize:result.size]}];
[subscriber putCompletion];
} else {
[subscriber putError:nil];
}
CGImageSourceRef src = CGImageSourceCreateWithURL((__bridge CFURLRef) url, NULL);
CFDictionaryRef options = (__bridge CFDictionaryRef) @{
(id) kCGImageSourceCreateThumbnailWithTransform : @YES,
(id) kCGImageSourceCreateThumbnailFromImageAlways : @YES,
(id) kCGImageSourceThumbnailMaxPixelSize : @(maxSize.width)
};
CGImageRef image = CGImageSourceCreateThumbnailAtIndex(src, 0, options);
CFRelease(src);
if (image == nil) {
[subscriber putError:nil];
return;
}
NSString *tempPath = [NSTemporaryDirectory() stringByAppendingPathComponent:[[NSString alloc] initWithFormat:@"img%d", (int)arc4random()]];
CFURLRef tempUrl = (__bridge CFURLRef)[NSURL fileURLWithPath:tempPath];
CGImageDestinationRef destination = CGImageDestinationCreateWithURL(tempUrl, kUTTypeJPEG, 1, NULL);
NSDictionary *properties = @{ (__bridge NSString *)kCGImageDestinationLossyCompressionQuality: @(0.52)};
CGImageDestinationSetProperties(destination, (__bridge CFDictionaryRef)properties);
CGImageDestinationAddImage(destination, image, nil);
if (!CGImageDestinationFinalize(destination)) {
CFRelease(destination);
[subscriber putError:nil];
return;
}
CFRelease(destination);
NSData *resultData = [[NSData alloc] initWithContentsOfFile:tempPath options:NSDataReadingMappedIfSafe error:nil];
if (resultData != nil) {
[subscriber putNext:@{@"scaledImageData": resultData, @"scaledImageDimensions": [NSValue valueWithCGSize:CGSizeMake(CGImageGetWidth(image), CGImageGetHeight(image))]}];
[subscriber putCompletion];
} else {
[subscriber putError:nil];
}