[Rawstudio-dev] various patches for svn-2079

[Ille]

Hi,

I join some patches to be applied to rawstudio-svn-2079.

The toolbox patch add spinbuttons to the sliders, as many users asked
for it.
Also it set the default value for tint to 1.0, don't know if this is a
problem only for me, my raw files appears way to reddish...

The x3f patch permit auto rotation of x3f files according to the x3f
header's rotation field. It also add a check in dcraw.cc to be sure x3f
pixels values do not exceed 4095. Surely this check must be done
somewhere else (to not modify dcraw.cc), but it seemed to me the
easiest way for now, as my computing skills are not so good.
It also add two new fields to the metadata struct: exposure and
sharpness, as those are defined in the x3f header.
Plus I tried to get the extended data correctly loaded, so that work
done with Sigma Photo Pro could be reused in rawstudio. the result is
truly not exact, but I will try to enhance this.

TODO:
- I can't save as jpeg anymore, as the jpeg writer tries to write exif
datas, but x3f's exif are not well recognized by libexiv2.
- I would like to be able to store the corrections applied in rawstudio
directly in the x3f file, as extended data permit this.
- I would like to try to implement the X3FillLight function.
- I would also like to implement a better white balance correction for
  x3f files.


Regards,
Ille

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