[Mesa-dev] [PATCH] r600g: 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/evergreen_state.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/gallium/drivers/r600/evergreen_state.c b/src/gallium/drivers/r600/evergreen_state.c
index 6595267..4da333a 100644
--- a/src/gallium/drivers/r600/evergreen_state.c
+++ b/src/gallium/drivers/r600/evergreen_state.c
@@ -3033,6 +3033,10 @@ void evergreen_update_ps_state(struct pipe_context *ctx, struct r600_pipe_shader
 		if (sid) {
 			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