Hi,
TL;DR: the sticky preview ("Z") mode of lighttable is very slow for me. I
think that this can be improved by preloading of the next image in the
background. How can I enable that? Pointers to a correct place within
sources are welcome, but I've already glanced through lighttable.c, and I
have to admit I feel a bit lost because I don't know DT's internals.
Details: I've got a bunch of pictures of dancing people taken at high ISOs,
and I have a preset for auto-applying e.g. profiled denoise for all of them
at import time. I don't have a discrete GPU, so the denoising alone can
take several seconds. Now, I would like to pick a best image from each
series (f/1.4 can be tricky, especially with a dim-lit scene of dancing
people who blink and what not...). The lighttable's sticky preview appears
to be a perfect tool for this -- it show me enough details to evaluate
pictures, and it's easy to use rating from there. However, showing an image
for the first time is very slow here (several seconds) because there's no
preload. Here's what I would like DT to have:
- Notice that I'm browsing in the preview mode, and preload the next couple
of images in the current view as a background activity.
- Have a way to pregenerate all of these preview images in advance, for
example over night, to save my time when I'm eyeballing the pictures.
The thumbnail pregenerating should respect my display profile. I have a
wide-gamut screen, so `darktable-cli --generate-cache` is not suitable for
me. I also move between two workplaces with different screens with a
different display profile, so bonus points for being able to specify these
profiles separately from what I have connected right now, but that's a
low-priority thing for me.
I think that I could possibly make it a little bit faster if I switched to
using the embedded thumbnails from RAWs in the preview mode (I tried that a
long time ago). However, the display profile does not appear to be applied
to the embedded JPEG thumbs, which sucks because the colors are way off
without this.
Maybe my workflow is weird. Should I adapt myself and change something to
better use what DT makes available?
Cheers,
Jan
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