From: Axel Davy <axel.davy@ens.fr>
Date: Sat, 19 Mar 2016 18:57:00 +0000 (+0100)
Subject: radeonsi: Change default behaviour for undefined COLOR0
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=fc3533c088d61888f5eae8e11fff2e1120d21777;p=mesa.git

radeonsi: Change default behaviour for undefined COLOR0

d3d 9 needs COLOR0 to be 1.0 on all channels when
undefined. 0.0 for the others is fine.
GL behaviour is undefined.

Signed-off-by: Axel Davy <axel.davy@ens.fr>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
---

diff --git a/src/gallium/drivers/radeonsi/si_state_shaders.c b/src/gallium/drivers/radeonsi/si_state_shaders.c
index 11e73098253..13066ff3c7d 100644
--- a/src/gallium/drivers/radeonsi/si_state_shaders.c
+++ b/src/gallium/drivers/radeonsi/si_state_shaders.c
@@ -1406,6 +1406,9 @@ static unsigned si_get_ps_input_cntl(struct si_context *sctx,
 		 * Don't set any other bits.
 		 * (FLAT_SHADE=1 completely changes behavior) */
 		ps_input_cntl = S_028644_OFFSET(0x20);
+		/* D3D 9 behaviour. GL is undefined */
+		if (name == TGSI_SEMANTIC_COLOR && index == 0)
+			ps_input_cntl |= S_028644_DEFAULT_VAL(3);
 	}
 	return ps_input_cntl;
 }