FlightGear flight simulator for Sailfish OS. This is a full port of FlightGear 2020.3.19 — not a remote viewer, not a streaming client. The simulator runs on the device. ### Why this was hard Sailfish OS has no desktop OpenGL. The GPU only speaks OpenGL ES through libhybris and the proprietary vendor blob. FlightGear and OpenSceneGraph need desktop GL including the fixed-function pipeline — glBegin, matrix stack, display lists. The way around it is Mesa Zink, which translates OpenGL to Vulkan, and Vulkan is reachable through libhybris.
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