vc4: Fix point size lookup.

I think I may have regressed this in the NIR conversion.  TGSI-to-NIR is
putting the PSIZ in the .x channel, not .w, so we were grabbing some
garbage for point size, which ended up meaning just not drawing points.

Fixes glean pointAtten and pointsprite.

diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c
index 52317bd02afcfd0a80e3b9daf65aec66503e801b..197577b6c209b8c4389f5b286f38ed76b81e3529 100644 (file)
--- a/src/gallium/drivers/vc4/vc4_program.c
+++ b/src/gallium/drivers/vc4/vc4_program.c
@@ -1171,7 +1171,7 @@ emit_point_size_write(struct vc4_compile *c)
         struct qreg point_size;
 
         if (c->output_point_size_index != -1)
-                point_size = c->outputs[c->output_point_size_index + 3];
+                point_size = c->outputs[c->output_point_size_index];
         else
                 point_size = qir_uniform_f(c, 1.0);