[Kde-imaging] QtRaw, a Qt image plugin using libraw

[Marcel Wiesweg]

> 
> More on file formats: the plugin announces itself as supporting the
> following formats:  cr2, arw, nef, raf and dng. The list is hardcoded in
> RawPlugin::keys(). Is there something smarter to do there (like getting such
> a list from libraw)?

Yes getting the list from libkdcraw... see its file rawfiles.h

> 
> The plugin also does something weird in RawPlugin::capabilities(), adding
> tif format there. I am not sure this is a good idea.
> 
> Anyway, your feedback on this is welcome. It would be nice if we can get
> distributions to ship this plugin, but before pushing distros to package it,
> I want to make sure it does not interfer with existing raw support in
> digiKam and other imaging applications.

digikam uses libkdcraw and no QImageIO architecture for this.
RAW files are 16 bit data; QImage is 8 bit. Auto conversion is good, often the 
embedded preview is better for the purpose of having something in 8 bit to 
display; most though, the preview is smaller. Not necessarily.
So it should be clear, from the plugins documentation, that you'll always have 
a sort of lossy conversion.