
Proposed back in 2018 was the Intel blackhole render extension for OpenGL / GLES as an extension to disable all rendering operations emitted to the GPU through OpenGL rendering commands but without affecting OpenGL pipeline operations.
That extension, INTEL_blackhole_render, saw patches back around that point while now finally for Mesa 20.1-devel this Intel OpenGL extension is seeing mainline support for all drivers.
The INTEL_blackhole_render extension is principally useful for debugging / driver optimization analysis purposes. One of the driving motivators appears to be for analyzing the Intel kernel driver execbuffer overhead.
So INTEL_blackhole_renderer is now the latest OpenGL extension in Git for next quarter's Mesa 20.1.
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