https://bugs.winehq.org/show_bug.cgi?id=39180
--- Comment #49 from Guillaume Charifi guillaume.charifi@sfr.fr --- No, it is *not* a Mesa bug, it's a missing feature in Wine. I implemented it locally and text displays correctly. By the way, I've implemented enough of tessellation to be able to run Unigine Heaven, and I'm now working on compute shaders. :)