i965: Ignore anisotropic filtering in nearest mode.

This fixes both Europa Universalis IV and Stellaris rendering on i965.
This was tested on SKL.

This fix was discovered by Jakub Szuppe at Stream HPC
(https://streamhpc.com/).

bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96958
bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=95530
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Tested-by: Dylan Baker <dylan@pnwbakers.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Cc: 17.1 <mesa-stable@lists.freedesktop.org>

diff --git a/src/mesa/drivers/dri/i965/brw_sampler_state.c b/src/mesa/drivers/dri/i965/brw_sampler_state.c
index 5d57a35f20f311849b21c6ccba1fe55b7089cad7..26bf0cb3e2d59425928867449220ff232a472aa6 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_sampler_state.c
+++ b/src/mesa/drivers/dri/i965/brw_sampler_state.c
@@ -450,8 +450,10 @@ brw_update_sampler_state(struct brw_context *brw,
    /* Enable anisotropic filtering if desired. */
    unsigned max_anisotropy = BRW_ANISORATIO_2;
    if (sampler->MaxAnisotropy > 1.0f) {
-      min_filter = BRW_MAPFILTER_ANISOTROPIC;
-      mag_filter = BRW_MAPFILTER_ANISOTROPIC;
+      if (min_filter == BRW_MAPFILTER_LINEAR)
+         min_filter = BRW_MAPFILTER_ANISOTROPIC;
+      if (mag_filter == BRW_MAPFILTER_LINEAR)
+         mag_filter = BRW_MAPFILTER_ANISOTROPIC;
 
       if (sampler->MaxAnisotropy > 2.0f) {
         max_anisotropy =