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https://issues.apache.org/jira/browse/CB-2896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13627846#comment-13627846
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Sébastien BUREL commented on CB-2896:
-------------------------------------
Yes i try to retreive the exif part on my server, i have also try with open
source tools ans got the same problems.
In fact i have isolated the bug, when you call createExifIFDFromDict for the
second time (subExifIFD), the offset you calculate doesn't take in account that
second position. Then the data with a length > 8 are append with a wrong
offset. It concern DateTimeDigitized and DateTimeOriginal.
I didn't tried to find a fix because i found the
CGImageDestinationAddImageFromSource solution.
For my application, i also need GeoTagging and Metadata for image coming from
SaveAlbum and Photo library.
Using the same trick, i am abble to make jpeg with metadat including geotagging
from assetsLibrary:
NSDictionary *metadata = [info
objectForKey:@"UIImagePickerControllerMediaMetadata"];
if (metadata) {
CGImageSourceRef sourceImage =
CGImageSourceCreateWithData((__bridge_retained CFDataRef)data, NULL);
CFStringRef sourceType = CGImageSourceGetType(sourceImage);
CGImageDestinationRef destinationImage =
CGImageDestinationCreateWithData((__bridge CFMutableDataRef)data, sourceType,
1, NULL);
CGImageDestinationAddImageFromSource(destinationImage,
sourceImage, 0, (__bridge CFDictionaryRef)metadata);
CGImageDestinationFinalize(destinationImage);
CFRelease(sourceImage);
CFRelease(destinationImage);
}
else {
NSURL *url = [info
objectForKey:UIImagePickerControllerReferenceURL];
if (url) {
self.data = data;
void
(^ALAssetsLibraryAssetForURLResultBlock)(ALAsset *) = ^(ALAsset *asset) {
CDVPluginResult* result = nil;
NSDictionary *metadata =
asset.defaultRepresentation.metadata;
CGImageSourceRef sourceImage =
CGImageSourceCreateWithData((__bridge_retained CFDataRef)self.data, NULL);
CFStringRef sourceType =
CGImageSourceGetType(sourceImage);
CGImageDestinationRef
destinationImage = CGImageDestinationCreateWithData((__bridge
CFMutableDataRef)self.data, sourceType, 1, NULL);
CGImageDestinationAddImageFromSource(destinationImage, sourceImage, 0,
(__bridge CFDictionaryRef)metadata);
CGImageDestinationFinalize(destinationImage);
CFRelease(sourceImage);
CFRelease(destinationImage);
.....
};
ALAssetsLibrary *library = [[ALAssetsLibrary
alloc] init];
[library assetForURL:url
resultBlock:ALAssetsLibraryAssetForURLResultBlock failureBlock:^(NSError
*error) {}];
self.hasPendingOperation = YES;
return;
}
}
/* splice loc */
//CDVJpegHeaderWriter* exifWriter = [[CDVJpegHeaderWriter alloc] init];
//NSString* headerstring = [exifWriter createExifAPP1:[info
objectForKey:@"UIImagePickerControllerMediaMetadata"]];
//[exifWriter spliceExifBlockIntoJpeg:data withExifBlock:headerstring];
}
> Multipart exif tags are not written correctly
> ---------------------------------------------
>
> Key: CB-2896
> URL: https://issues.apache.org/jira/browse/CB-2896
> Project: Apache Cordova
> Issue Type: Bug
> Components: iOS
> Affects Versions: 2.6.0
> Reporter: Lorin Beer
> Assignee: Lorin Beer
> Priority: Critical
> Fix For: 2.6.0
>
>
> multi-part (complex) tags are not written correctly. this leads to an exif
> string which is of the correct size (and therefore is not reported as an
> error) but cannot be read back out.
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