i965/gen7: Fix point sprite texture coordinate overrides.

This is exactly analogous to Eric's Gen6 change in commit
f304bb8a5d040d99db47a65813d216d11c66fb47.  His explanation:

"We were assuming that the input attribute n to the FS was
 FRAG_ATTRIB_TEXn, which happened to be true often enough for our
 testcases."

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
NOTE: This is a candidate for the 7.11 branch.

diff --git a/src/mesa/drivers/dri/i965/gen7_sf_state.c b/src/mesa/drivers/dri/i965/gen7_sf_state.c
index aeeb4f2..e36c44a 100644 (file)
--- a/src/mesa/drivers/dri/i965/gen7_sf_state.c
+++ b/src/mesa/drivers/dri/i965/gen7_sf_state.c
@@ -58,12 +58,6 @@ upload_sbe_state(struct brw_context *brw)
       dw1 |= GEN6_SF_POINT_SPRITE_LOWERLEFT;
 
    dw10 = 0;
-   if (ctx->Point.PointSprite) {
-       for (i = 0; i < 8; i++) {
-          if (ctx->Point.CoordReplace[i])
-              dw10 |= (1 << i);
-       }
-   }
 
    /* _NEW_LIGHT (flat shading) */
    dw11 = 0;
@@ -79,6 +73,12 @@ upload_sbe_state(struct brw_context *brw)
       if (!(brw->fragment_program->Base.InputsRead & BITFIELD64_BIT(attr)))
         continue;
 
+      if (ctx->Point.PointSprite &&
+         attr >= FRAG_ATTRIB_TEX0 && attr <= FRAG_ATTRIB_TEX7 &&
+         ctx->Point.CoordReplace[attr - FRAG_ATTRIB_TEX0]) {
+        dw10 |= (1 << input_index);
+      }
+
       /* The hardware can only do the overrides on 16 overrides at a
        * time, and the other up to 16 have to be lined up so that the
        * input index = the output index.  We'll need to do some