[Digikam-devel] [Bug 210226] Adding Geolocation to image causes Flickr to not recognize EXIF data

[Gilles Caulier]

https://bugs.kde.org/show_bug.cgi?id=210226





--- Comment #29 from Gilles Caulier <caulier gilles gmail com>  2009-10-17 11:35:33 ---
Andreas,

Converting JPG to PNG use libjpeg to open image data and libpng to write image
data. In all case, metadata are not transfered by this way. All is deegate by
libkexiv2 and Exiv2.

I'm sure that no tags like this is added by digiKam and code. Why we will do it
?

Relevant code: 

PNG save image :

http://lxr.kde.org/source/extragear/graphics/digikam/libs/dimg/loaders/pngloader.cpp#555

Metadata transfert : DMetadata = libkexiv2 customization for digiKam

http://lxr.kde.org/source/extragear/graphics/digikam/libs/dimg/loaders/dimgloader.cpp#194

That all (:=))) Each Exif, Iptc, Xmp block are transfered as well from JPG to
PNG. As you know PNG image structure do not depand of metadata. Each metadata
block are hosted in a dedicated png chunk. It's clean and better than TIFF...

Gilles

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