Dne středa 04 únor 2009 Vladimir Nadvornik napsal(a):
> Hi,
>
> I'd like to hear your opinion on image orientation handling. There are 2
> possibilities:
>
> 1. edit/Adjust functions which rotate the image only on the screen +
> external programs (exiftran) that rotate the image file permanently
> - that is how it worked until now
>
> 2. edit/Adjust will update the metadata (either directly Exif in the image
> or the metadata in ~/.geeqie/ if the image file is not writable) +
> one external program that transforms the image according to orientation
> stored in the metadata (exiftran -a)
>
It seems to be necessary to explain in detail how the metadata writting
works in alpha3:
- Modified metadata (keywords and comment in alpha3) are stored
in write queue. A button on status bar (next to color) indicates non-empty
queue.
- Queue is written on disk, it happens after click on the button, switch to
another image, directory or timeout. Corresponding options are
"Write metadata after timeout"
"Write metadata on image change"
"Write metadata on directory change"
- Geeqie decides where the metadata will be written. If there is any problem
or "Ask before writting to image files", it shows a dialog with a summary
and waits for confirmation.
metadata are written
- to the image if "Store keywords and comments as XMP tags in image files"
is checked and the file format is marked as "Writable" in the "Filtering"
tab.
- to XMP sidecar file if "Store keywords and comments as XMP tags in image
files" is checked and the file format is marked as "Sidecar is allowed"
in the "Filtering" tab. The XMP specification allows sidecars only for raw
files.
- to ~/.geeqie/metadata/.../*.gq.xmp as a fallback if the options above
failed. There can be a warning if "Warn if the image files are unwritable"
is checked.
- Geeqie works internally with xmp which is converted to Exif and IPTC if the
metadata are written to image file.
If the data are written to image or to sidecar, any corresponding file under
~/.geeqie/metadata is deleted.
All the options are in the "Advanced" preferences tab.
"Store keywords and comments as XMP tags in image files" is disabled by
default.
For details see:
http://www.adobe.com/devnet/xmp/pdfs/XMPSpecificationPart3.pdf
Vladimir
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