No objections from me --
Can I ask you to post links here to example images after this is done?
(both .ora files and PNG final rendering, please :-) )
I could probably have this ported into GIMP reading of ORA's
(I will probably have to expand these clipping layers as layer masks
for the time being)
( of course, there is no promise for writing this as it is not a GIMP
feature as of yet).
js
-><-
On 7 April 2015 at 05:58, Andrew Chadwick <[email protected]> wrote:
> Hi, CREATE-friends --
>
> We'd like to add support for the "Destination Atop" and (especially)
> "Source Atop" compositing modes in MyPaint, to allow users to make
> groups clipped by their bottom layer's alpha. Use case: add shadows
> and highlighting without having to create a separate masking layer set
> to dst-in/dst-out.
>
> https://github.com/mypaint/mypaint/pull/284
> https://github.com/mypaint/mypaint/issues/181#issuecomment-89778738
>
> http://www.w3.org/TR/compositing-1/#porterduffcompositingoperators_srcatop
> http://www.w3.org/TR/compositing-1/#porterduffcompositingoperators_dstatop
>
> Does anyone have any objection to "svg:src-atop" and "svg:dst-atop"
> being added to the list at:
>
> https://wiki.freedesktop.org/www/Specifications/OpenRaster/Draft/LayersStack/#composite-opattribute
>
> The blending function for the modes is to be Normal.
>
> I'm Cc:ing Boud because I bet Krita already has this... Hopefully the
> naming of the element won't be an issue; the pattern has always been
> fairly obvious.
>
> --
> Andrew Chadwick
>
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