gallium: fix fog vs. pointcoord attribute handling in mesa->TGSI conversion

diff --git a/src/mesa/state_tracker/st_program.c b/src/mesa/state_tracker/st_program.c
index 936a6e32ea14de7151ae77b617b2d1fc821de17f..b2abf0286e73cd54f08af4e01ed6bbceea4383bc 100644 (file)
--- a/src/mesa/state_tracker/st_program.c
+++ b/src/mesa/state_tracker/st_program.c
@@ -409,7 +409,10 @@ st_translate_fragment_program(struct st_context *st,
             interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
             break;
          case FRAG_ATTRIB_FOGC:
-            stfp->input_semantic_name[slot] = TGSI_SEMANTIC_FOG;
+            if (stfp->Base.UsesPointCoord)
+               stfp->input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
+            else
+               stfp->input_semantic_name[slot] = TGSI_SEMANTIC_FOG;
             stfp->input_semantic_index[slot] = 0;
             interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
             break;