1 files changed, 17 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_shader.c b/src/mesa/state_tracker/st_atom_shader.c
index ee649be885..8b3bb5cc03 100644
--- a/src/mesa/state_tracker/st_atom_shader.c
+++ b/src/mesa/state_tracker/st_atom_shader.c
@@ -139,6 +139,23 @@ find_translated_vp(struct st_context *st,
          if (fragInputsRead & (1 << inAttr)) {
             stfp->input_to_slot[inAttr] = numIn;
             numIn++;
+            if (((1 << inAttr) & FRAG_BIT_FOGC)) {
+               /* leave placeholders for the
+                * extra registers we extract from fog */
+               if (stfp->Base.UsesFrontFacing) {
+                  if (!stfp->Base.UsesFogFragCoord)
+                     --stfp->input_to_slot[inAttr];
+                  else
+                     ++numIn;
+               }
+               if (stfp->Base.UsesPointCoord) {
+                  if (!stfp->Base.UsesFrontFacing &&
+                      !stfp->Base.UsesFogFragCoord)
+                     stfp->input_to_slot[inAttr] -= 2;
+                  else
+                     ++numIn;
+               }
+            }
          }
          else {
             stfp->input_to_slot[inAttr] = UNUSED;