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Twinside avatar Twinside commented on July 30, 2024

Is there a use case where this is really problematic?

from juicy.pixels.

Twinside avatar Twinside commented on July 30, 2024

Ah ok, make sense for YA* formats, I'll look into it

from juicy.pixels.

iger avatar iger commented on July 30, 2024

Yes, it's for specifying transparency and it should only be present if there are extra values such as alpha in the data stream.

Sorry about not making myself clear.

I added the bug, because saving of RGBA images was already implemented and it (also) did not generate the tags. On programs I have tried (eye of gnome, gimp, Image Magick) the presence of the tag did not seem to make a difference on either RGBA or YA images. Programs seem to have good defaults as this is the most common use of an extra channel.

So no, it is not problematic, for now, for my use along with these programs.

Still, the generated RGBA and YA files are not proper tiffs and there are other valid uses of extra channels.

from juicy.pixels.

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