[CREATE] [Mypaint-discuss] OpenRaster spec: proposal: add svg:src-atop and svg:dst-atop

[Andrew Chadwick]

Done. Revised stack specification:
https://wiki.freedesktop.org/www/Specifications/OpenRaster/Draft/LayersStack/

On 20 April 2015 at 01:23, Andrew Chadwick <a.t.chadwick at gmail.com> wrote:
> Just merged this onto MyPaint's master branch sorry for the delay.
> Sample image and output:
>
> https://github.com/mypaint/mypaint/issues/181#issuecomment-94327844
>
> I'll update the OpenRaster spec shortly.
>
> On 10 April 2015 at 00:20, Andrew Chadwick <a.t.chadwick at gmail.com> wrote:
>> Certainly! I'll press ahead and test the contributed code out this
>> weekend, and update the spec unless anyone has any objections.
>>
>> I'll bump the version to 0.0.5 as well. Heady heights...
>>
>> On 7 April 2015 at 13:49, Joao S. O. Bueno <gwidion at gmail.com> wrote:
>>> 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 <a.t.chadwick at gmail.com> 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
>>>>
>>>> _______________________________________________
>>>> Mypaint-discuss mailing list
>>>> Mypaint-discuss at gna.org
>>>> https://mail.gna.org/listinfo/mypaint-discuss
>>
>>
>>
>> --
>> Andrew Chadwick
>
>
>
> --
> Andrew Chadwick



-- 
Andrew Chadwick