57dcfb4e55
I've read the papers on EWA filters and it seems like the calculate
DDQ = 2 * A after the scaling of A happens. This seems to make
things less blurry and more like real aniso.
Fixes: 2135aba8 ("softpipe: Constify variables")
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11917>