Thank you both for all the thoughts...

There's a fork at https://github.com/dtorop/darktable with a branch
"xtrans2" with the changes so far, bundled into a few commits.

Misc. notes

- I haven't tested if the switch to LibRaw 0.16.0 breaks other things.

- That would be interesting if RawSpeed ends up supporting Fuji
sensors... As the LibRaw loading seems functional now, that could still
be a starting point for the rest of the work?

- Right now "filters" in image_ t is overloaded to differentiate Bayer
from X-Trans mosaics. If "filters" is 9 (an arbitrary magic number from
dcraw), the mosaic layout is in "xtrans", not "filters". Would it be
better to have a flag to specify if the image has a Bayer or X-Trans
mosaic? Not to bloat the image_t even more...

- The in-progress demosaic code uses linear interpolation modified from
dcraw (a slight improvement from the grayscale code I mentioned
yesterday). The mosaic is visible in the 1:1 view, though, perhaps from
an roi offsetting mistake on my part.

- The in-progress fast clip/zoom code is totally off, a quick/flawed
rehash of existing DT code.

The point about maintenance of code not used by core devs seems really
key... Still am glad if any of this so far is of use. Am happy to hear
further thoughts, and I'll hope to improve this.

Thank you,
Dan


On Tue, Feb 4, 2014, at 05:43 AM, Tobias Ellinghaus wrote:
> Am Dienstag, 4. Februar 2014, 10:08:24 schrieb johannes hanika:
> 
> [...]
> 
> > > - A potential patch could be pretty invasive -- not just requiring the
> > > LibRaw upgrade
> > 
> > that's great, we should have done that earlier i guess.
> 
> AFAIK there is ongoing work to support some of these Fuji sensors in
> rawspeed, 
> so maybe it would be better to wait for that update and ignore libraw.
> That 
> part is going to die as soon as possible anyway.
> 
> [...]
> 
> Tobias
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