gallium: Add TEX_FILTER_ANISO img filter

Hardware almost universally expects us to set a special filtering mode
when anisotropic filtering is enabled, as opposed to varying a max-aniso
values.  Do this once in the state tracker & simplify the driver code.

1 files changed, 8 insertions, 11 deletions

diff --git a/src/gallium/drivers/i915simple/i915_state.c b/src/gallium/drivers/i915simple/i915_state.c
index d9ab483bfc..57b195ea8d 100644
--- a/src/gallium/drivers/i915simple/i915_state.c
+++ b/src/gallium/drivers/i915simple/i915_state.c
@@ -71,6 +71,8 @@ static unsigned translate_img_filter( unsigned filter )
       return FILTER_NEAREST;
    case PIPE_TEX_FILTER_LINEAR:
       return FILTER_LINEAR;
+   case PIPE_TEX_FILTER_ANISO:
+      return FILTER_ANISOTROPIC;
    default:
       assert(0);
       return FILTER_NEAREST;
@@ -84,7 +86,7 @@ static unsigned translate_mip_filter( unsigned filter )
       return MIPFILTER_NONE;
    case PIPE_TEX_MIPFILTER_NEAREST:
       return MIPFILTER_NEAREST;
-   case PIPE_TEX_FILTER_LINEAR:
+   case PIPE_TEX_MIPFILTER_LINEAR:
       return MIPFILTER_LINEAR;
    default:
       assert(0);
@@ -211,16 +213,11 @@ i915_create_sampler_state(struct pipe_context *pipe,
    cso->templ = sampler;
 
    mipFilt = translate_mip_filter(sampler->min_mip_filter);
-   if (sampler->max_anisotropy > 1.0) {
-      minFilt = FILTER_ANISOTROPIC;
-      magFilt = FILTER_ANISOTROPIC;
-      if (sampler->max_anisotropy > 2.0) {
-         cso->state[0] |= SS2_MAX_ANISO_4;
-      }
-   }
-   else {
-      minFilt = translate_img_filter( sampler->min_img_filter );
-      magFilt = translate_img_filter( sampler->mag_img_filter );
+   minFilt = translate_img_filter( sampler->min_img_filter );
+   magFilt = translate_img_filter( sampler->mag_img_filter );
+   
+   if (sampler->max_anisotropy > 2.0) {
+      cso->state[0] |= SS2_MAX_ANISO_4;
    }
 
    {