display alternative glyphs specified with OpenType features
Submitted by Daiki Ueno
Link to original bug (#753868)
Description
Created attachment 309686 screenshot, using Adobe Source Sans Pro
At the Typography BOF at GUADEC, Nathan suggested to show alternative glyphs selected by certain OpenType features (such as cv00-90, ss00-20), along with the base glyph.
I am currently working on it in a branch (screenshot attached): https://git.gnome.org/browse/gnome-characters/log/?h=wip/dueno/font-features
The current approach is to show a floating toolbar on the character dialog, by hovering the cursor on the character label. If it is useful, I would like to include it in 3.17.91.
Attachment 309686, "screenshot, using Adobe Source Sans Pro":