st/nine: Enforce centroid for color input when multisampling is on

The color inputs must automatically use centroid whether
multisampling is used or not.

Signed-off-by: Axel Davy <[email protected]>
Reviewed-by: Patrick Rudolph <[email protected]>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/nine/pixelshader9.h b/src/gallium/state_trackers/nine/pixelshader9.h
index e09009f6621..6b431813a81 100644
--- a/src/gallium/state_trackers/nine/pixelshader9.h
+++ b/src/gallium/state_trackers/nine/pixelshader9.h
@@ -28,6 +28,7 @@
 #include "nine_state.h"
 #include "basetexture9.h"
 #include "nine_ff.h"
+#include "surface9.h"
 
 struct nine_lconstf;
 
@@ -92,6 +93,10 @@ NinePixelShader9_UpdateKey( struct NinePixelShader9 *ps,
         key |= ((uint64_t)state->rs[D3DRS_FOGTABLEMODE]) << 33;
     }
 
+    /* centroid interpolation automatically used for color ps inputs */
+    if (state->rt[0]->desc.MultiSampleType > 1)
+        key |= ((uint64_t)1) << 34;
+
     if (unlikely(ps->byte_code.version < 0x14)) {
         projected = nine_ff_get_projected_key(state);
         key |= ((uint64_t) projected) << 48;