i915: Override mip filter to nearest with aniso

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.

Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

diff --git a/src/mesa/drivers/dri/i915/i830_texstate.c b/src/mesa/drivers/dri/i915/i830_texstate.c
index b1414c7..00731e6 100644 (file)
--- 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) {