On Wed, Jul 31, 2013 at 8:53 AM, Paul Berry <stereotype...@gmail.com> wrote:
>Can you point me to some VS code that does this? I thought that if the VS
>wrote only to gl_BackColor, then the VUE map would only contain a slot for
>gl_BackColor.
The VS now does this:
diff --git a/src/mesa/drivers/dri/i965/
brw_vs.c b/src/mesa/drivers/dri/i965/brw_vs.c
index 60b40c5..5b8173d 100644
--- a/src/mesa/drivers/dri/i965/brw_vs.c
+++ b/src/mesa/drivers/dri/i965/brw_vs.c
@@ -277,6 +277,12 @@ do_vs_prog(struct brw_context *brw,
if (c.key.point_coord_replace & (1 << i))
outputs_written |= BITFIELD64_BIT(VARYING_SLOT_TEX0 + i);
}
+
+ /* if back colors are written, allocate slots for front colors too */
+ if (outputs_written & BITFIELD64_BIT(VARYING_SLOT_BFC0))
+ outputs_written |= BITFIELD64_BIT(VARYING_SLOT_COL0);
+ if (outputs_written & BITFIELD64_BIT(VARYING_SLOT_BFC1))
+ outputs_written |= BITFIELD64_BIT(VARYING_SLOT_COL1);
}
brw_compute_vue_map(brw, &prog_data.base.vue_map, outputs_written,
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