So, it's basically the MESA Intel graphics pipeline?
EDIT:
For the downvoters and the unclear, the relevant bit talks about compiling exactly the instructions needed to change the image. As I understand it, this JIT recompilation of pixel shaders is effectively what was implemented in the mesa drivers for Intel chipsets.
Compiling the shaders is a big win, since it allows us to do almost all operations in one pass rather than multiple passes. The service is intended to function on-demand and in real time, so latency matters a lot.
EDIT:
For the downvoters and the unclear, the relevant bit talks about compiling exactly the instructions needed to change the image. As I understand it, this JIT recompilation of pixel shaders is effectively what was implemented in the mesa drivers for Intel chipsets.