[Mesa-dev] [PATCH 0/5] Gallium: Passing drirc options to create_screen() and fixing Rocket League

[Ilia Mirkin]

On Tue, Jun 20, 2017 at 6:54 PM, Marek Olšák <maraeo at gmail.com> wrote:
> The first pipe_screen flag is a drirc option to fix incorrect grass
> rendering in Rocket League for radeonsi. Rocket League expects DirectX
> behavior for partial derivative computations after discard/kill, but
> radeonsi implements the more efficient but stricter OpenGL behavior
> and that will remain our default behavior. The new screen flag forces
> radeonsi to use the DX behavior for that game.

For those of us following along at home... can you provide a brief
reminder of what the DX behavior is, and how does it differ from GL
behavior? In case one might want to fix this for nouveau (if a fix is
needed at all)...

Thanks,

  -ilia