[Mesa-dev] [PATCH 1/3] r600: 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/r600/r600_state.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/gallium/drivers/r600/r600_state.c b/src/gallium/drivers/r600/r600_state.c
index 3189a13..d448d90 100644
--- a/src/gallium/drivers/r600/r600_state.c
+++ b/src/gallium/drivers/r600/r600_state.c
@@ -2518,6 +2518,10 @@ void r600_update_ps_state(struct pipe_context *ctx, struct r600_pipe_shader *sha
 
 		tmp = S_028644_SEMANTIC(sid);
 
+		/* D3D 9 behaviour. GL is undefined */
+		if (rshader->input[i].name == TGSI_SEMANTIC_COLOR && rshader->input[i].sid == 0)
+			tmp |= S_028644_DEFAULT_VAL(3);
+
 		if (rshader->input[i].name == TGSI_SEMANTIC_POSITION ||
 			rshader->input[i].interpolate == TGSI_INTERPOLATE_CONSTANT ||
 			(rshader->input[i].interpolate == TGSI_INTERPOLATE_COLOR &&
-- 
2.7.3