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fix: Fix image compression on iOS and make it respect to image scale factor #2081

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fix: Fix image compression on iOS and make it respect to image scale factor #2081

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30 changes: 18 additions & 12 deletions ios/src/Compression.m
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Original file line number Diff line number Diff line change
Expand Up @@ -41,25 +41,31 @@ - (ImageResult*) compressImageDimensions:(UIImage*)image
CGFloat oldWidth = image.size.width;
CGFloat oldHeight = image.size.height;

int newWidth = 0;
int newHeight = 0;
int width = oldWidth;
int height = oldHeight;

if (maxWidth < maxHeight) {
newWidth = maxWidth;
newHeight = (oldHeight / oldWidth) * newWidth;
} else {
newHeight = maxHeight;
newWidth = (oldWidth / oldHeight) * newHeight;
if (width > maxWidth) {
height = height * (maxWidth / width);
width = maxWidth;
}

if (height > maxHeight) {
width = width * (maxHeight / height);
height = maxHeight;
}
CGSize newSize = CGSizeMake(newWidth, newHeight);

UIGraphicsImageRenderer *renderer = [[UIGraphicsImageRenderer alloc] initWithSize:newSize];
CGSize newSize = CGSizeMake(width, height);

UIGraphicsImageRendererFormat *format = [[UIGraphicsImageRendererFormat alloc] init];
format.scale = image.scale;

UIGraphicsImageRenderer *renderer = [[UIGraphicsImageRenderer alloc] initWithSize:newSize format:format];
UIImage *resizedImage = [renderer imageWithActions:^(UIGraphicsImageRendererContext * _Nonnull rendererContext) {
[image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
}];

result.width = [NSNumber numberWithFloat:newWidth];
result.height = [NSNumber numberWithFloat:newHeight];
result.width = [NSNumber numberWithFloat:width];
result.height = [NSNumber numberWithFloat:height];
result.image = resizedImage;
return result;
}
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