Olivier Fourdan <ofour...@redhat.com> writes:

> When using glamor (either in Xephyr or Xwayland) on hardware with too
> low instructions limit, glamor fallbacks to sw due to large shaders.
>
> This makes glamor unbearably slow on such hardware.
>
> Check reported value for GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB
> and fail in glamor_init() if the limit is lower than 128.

Reviewed and applied to -next.  Thanks!

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