On 30 July 2013 14:06, Chris Forbes <chr...@ijw.co.nz> wrote: > 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, >
Aha! That's what I was missing, thanks.
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