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X-Bullshit: hardware database database-aware package-aware property API 
Subject: Re: [9front] Blie - blended layers image editor
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11.08.2024 20:50:22 sl@stanleylieber.com:
> paint(1) has some nice design choices. following programs like sam
> and acme, you can do things like this:
>
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <command
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 Executes command and reads the canvas from its standard
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 output.
>
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 >command
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 Executes command and writes the canvas to its standard
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 input.
>
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |command
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 Transforms the canvas by piping it through command.
>
> this allows a lot of features to be towed outside the layer-compositing
> program entirely, and any such tools can also be reused for other
> applications.

Yes, exactly.

In blie, that should be easily doable as an effect/pipe layer, which would =
be a separate layer type that doesn't have any bitmap data itself, but pipe=
s the image through any command (or commands) you'd like, for example a blo=
om filter.

The bonus would be that this is non-destructive, so you can adjust the base=
 layers and still get the same effect added on it. You can also move that l=
ayer around, which changes the image, but you don't lose any data.

That's also the idea behind farbfeld (if you want to look at it): have an i=
mage format that's as simple as possible so you can send the data in a pipe=
. Farbfeld is not primarily designed as a storage format, more like an inte=
rmediate format: png2ff <src.png | filterA | filterB | ff2png >dst.png. (I =
don't plan to add farbfeld support as it's not a plan 9 thing. I built some=
 ff to plan 9 image converter a while ago though.)

sirjofri