From f74cf5f80ea6ea16abb38c28c2b4826b8559017b Mon Sep 17 00:00:00 2001 From: Ian Romanick Date: Tue, 4 Mar 2014 11:08:05 +0200 Subject: [PATCH] i965: Enable EWA anisotropic filtering algorithm Volume 4, part 1 of the Ivybridge PRM says, "Generally, the EWA approximation algorithm results in higher image quality than the legacy algorithm." Using a classic anisotropic filtering "tunnel" demo, it appears that there is *no* anisotropic filtering on IVB without this bit set. Signed-off-by: Ian Romanick Reviewed-by: Kenneth Graunke --- src/mesa/drivers/dri/i965/gen7_sampler_state.c | 1 + 1 file changed, 1 insertion(+) diff --git a/src/mesa/drivers/dri/i965/gen7_sampler_state.c b/src/mesa/drivers/dri/i965/gen7_sampler_state.c index 968c410345e..709a783f141 100644 --- a/src/mesa/drivers/dri/i965/gen7_sampler_state.c +++ b/src/mesa/drivers/dri/i965/gen7_sampler_state.c @@ -82,6 +82,7 @@ gen7_update_sampler_state(struct brw_context *brw, int unit, int ss_index, if (gl_sampler->MaxAnisotropy > 1.0) { sampler->ss0.min_filter = BRW_MAPFILTER_ANISOTROPIC; sampler->ss0.mag_filter = BRW_MAPFILTER_ANISOTROPIC; + sampler->ss0.aniso_algorithm = 1; if (gl_sampler->MaxAnisotropy > 2.0) { sampler->ss3.max_aniso = MIN2((gl_sampler->MaxAnisotropy - 2) / 2, -- 2.30.2