i965/clip: Enable interpolation of clip distances

Previously we had disabled interpolation of the clip distances as a
special case, since they were unused.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Paul Berry <stereotype441@gmail.com>

diff --git a/src/mesa/drivers/dri/i965/brw_clip_util.c b/src/mesa/drivers/dri/i965/brw_clip_util.c
index 8500b8b..2ba4dcb 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_clip_util.c
+++ b/src/mesa/drivers/dri/i965/brw_clip_util.c
@@ -256,13 +256,9 @@ void brw_clip_interp_vertex( struct brw_clip_compile *c,
            brw_MOV(p, deref_4f(dest_ptr, delta), brw_imm_f(1));
         else
            brw_MOV(p, deref_4f(dest_ptr, delta), deref_4f(v0_ptr, delta));
-      } else if (varying == VARYING_SLOT_PSIZ ||
-                 varying == VARYING_SLOT_CLIP_DIST0 ||
-                 varying == VARYING_SLOT_CLIP_DIST1) {
-        /* PSIZ doesn't need interpolation because it isn't used by the
-          * fragment shader.  CLIP_DIST0 and CLIP_DIST1 don't need
-          * intepolation because on pre-GEN6, these are just placeholder VUE
-          * slots that don't perform any action.
+      } else if (varying == VARYING_SLOT_PSIZ) {
+         /* PSIZ doesn't need interpolation because it isn't used by the
+          * fragment shader.
           */
       } else if (varying < VARYING_SLOT_MAX) {
         /* This is a true vertex result (and not a special value for the VUE