[Mesa-dev] [PATCH 2/3] radeonsi: Change default behaviour for undefined COLOR0

[Axel Davy]

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 at ens.fr>
---
 src/gallium/drivers/radeonsi/si_state_shaders.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gallium/drivers/radeonsi/si_state_shaders.c b/src/gallium/drivers/radeonsi/si_state_shaders.c
index 0248958..b788ae0 100644
--- a/src/gallium/drivers/radeonsi/si_state_shaders.c
+++ b/src/gallium/drivers/radeonsi/si_state_shaders.c
@@ -1473,6 +1473,9 @@ 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;
 }
-- 
2.7.3