Blender Git Commit Log

Fix T77830: Crash in VR session when opening material preview

Draw-manager mutex has to be set before activating OpenGL/GPU context.
Otherwise, parallel jobs (like preview rendering) may try to activate
the context from another thread.

Also: Use WM wrappers for activating/releasing OpenGL context, which
have an additional assert check.

Suggest to backport this for 2.83.1.