Created attachment 126454 [details]
Example of Glow Effects
The the DrawingML 126.96.36.199 Glow Effect is stored in OOXML as <a:effectLst> and <a:glow> elements. Such as:
Currently we do not support it. It's similar to a centered soft shadow like effect.
Why should we care about trying to implement these questionable OpenOfficeXML? They are not native to ODF and would each have to be parsed during filter import and "simulated" on drawing shapes.
Issue with import, and issues with export back to OOXML.
We gain what?
Any improvement in MSO interoperability is a win.
I singled out this effect, because I've encountered it in several documents, one where a diagram was unreadable because of our lack of support. Of the other effects that you listed, 3/8 are shadow where we already have excellent support. We do our best to simulate them, and as long as no changes are made we pass the preserved OOXML values on export.
We don’t’ need to fully support this effect, just like we do not fully support all of the OOXML shadow parameters. However rendering something, even if it’s just a centered shadow, is better than what we do now.
Ok, if someone wishes to work on it..