st/mesa: automatically set per-sample interpolation if using SampleID/Pos

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
2015-09-27 19:54:57 +02:00
parent 4e9fc7e4e2
commit 6b0f21cb28
2 changed files with 10 additions and 2 deletions
--- a/src/mesa/state_tracker/st_program.c
+++ b/src/mesa/state_tracker/st_program.c
@@ -619,7 +619,9 @@ st_translate_fragment_program(struct st_context *st,
         else
            interpLocation[slot] = TGSI_INTERPOLATE_LOC_CENTER;

-         if (key->persample_shading)
+         if (stfp->Base.Base.SystemValuesRead & (SYSTEM_BIT_SAMPLE_ID |
+                                                 SYSTEM_BIT_SAMPLE_POS) ||
+             key->persample_shading)
            interpLocation[slot] = TGSI_INTERPOLATE_LOC_SAMPLE;

         switch (attr) {