This is not correct. Right now, the GPU Driver for Asahi Linux is not written in Rust/C++ yet (because that's a lot of work). Instead, the prototype driver is written in Python, and when it is done, then it will be rewritten in Rust/C++ once it works correctly. It runs on a host system, receives OpenGL calls (like the demo application shown at the bottom), and then creates a pile of GPU instructions that are then sent over USB to run on the real GPU in the m1n1 preboot environment. So, in practice, the GPU is being reverse-engineered, is doing the rendering, it's just that the OpenGL -> GPU layer is being handled outside Linux in a simpler language for development speed. This prototype GPU driver has 94% openGLES test suite compliance at this point.

> It will probably take many years to reverse engineer.

The last 6% is probably decently hard, but it will probably not be terribly hard to finish - and not long for this team thereafter to change the Python code into an actual Linux driver considering the sheer number of drivers they've already written. Once you have openGLES, you have a HW-accelerated desktop, at least through most desktop environments. Video acceleration is another story they haven't started on, but its generally easy by comparison. Might take another year or two for full OpenGL or Vulkan though.