[Mesa-dev] [PATCH 4/9] i915: Override mip filter to nearest with aniso

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

gen2 doesn't supporte linear mip filter with anisotropic min/mag
filtering. The hardware would automagically downgrade the min/mag
filters to linear in such cases, which IMO looks worse than forcing
the mip filter to nearest.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 src/mesa/drivers/dri/i915/i830_texstate.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/mesa/drivers/dri/i915/i830_texstate.c b/src/mesa/drivers/dri/i915/i830_texstate.c
index b1414c7..00731e6 100644
--- a/src/mesa/drivers/dri/i915/i830_texstate.c
+++ b/src/mesa/drivers/dri/i915/i830_texstate.c
@@ -225,6 +225,8 @@ i830_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
       if (sampler->MaxAnisotropy > 1.0) {
          minFilt = FILTER_ANISOTROPIC;
          magFilt = FILTER_ANISOTROPIC;
+         /* no trilinear + anisotropic */
+         mipFilt = MIPFILTER_NEAREST;
       }
       else {
          switch (sampler->MagFilter) {
-- 
1.8.5.5