OpenGL Connundrum
This advice is only a fallback from my real advice, which is running away from such a project/team/company and letting your (former) manager deal with self-imposed trouble.
@OP - is the reason for not being able to use ANGLE the BSD license? TitaniumGL is another option that's freeware but only supports GL1.4; no shaders but better at least than software-emulated 1.1 (I've little experience of it so can't vouch for it's quality).
It has to do with more requirements, but that may be based on legal; I really don't know. Thanks for the suggestions though!
@OP - is the reason for not being able to use ANGLE the BSD license? TitaniumGL is another option that's freeware but only supports GL1.4; no shaders but better at least than software-emulated 1.1 (I've little experience of it so can't vouch for it's quality).
It has to do with more requirements, but that may be based on legal; I really don't know. Thanks for the suggestions though!
Couldn't you statically link to ANGLE for your Windows build?
Just an update for anyone reading this in the future: I implemented a GL 1.1 render path and the results were ~10fps @ 1080p and ~35fps @ 1280x1024. This is compared to ~80fps and ~100fps when rendering as non-emulated GL 2.1.