r600: 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/r600/r600_state.c b/src/gallium/drivers/r600/r600_state.c
index 9774bdd..9a33ab9 100644 (file)
--- a/src/gallium/drivers/r600/r600_state.c
+++ b/src/gallium/drivers/r600/r600_state.c
@@ -2477,6 +2477,10 @@ 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 &&