i965: Fix source depth reg setting for FSes reading and writing to depth.

[mesa.git] / src / mesa / drivers / dri / i965 / brw_wm_iz.c

diff --git a/src/mesa/drivers/dri/i965/brw_wm_iz.c b/src/mesa/drivers/dri/i965/brw_wm_iz.c
index bd60ac9b3159542012e953d824057031a9318499..7e2b1c79dedf1293604f533919ae0fa590be39d4 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_wm_iz.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_iz.c
@@ -118,6 +118,7 @@ const struct {
 
 void brw_wm_lookup_iz( GLuint line_aa,
                       GLuint lookup,
+                      GLboolean ps_uses_depth,
                       struct brw_wm_prog_key *key )
 {
    GLuint reg = 2;
@@ -127,7 +128,7 @@ void brw_wm_lookup_iz( GLuint line_aa,
    if (lookup & IZ_PS_COMPUTES_DEPTH_BIT)
       key->computes_depth = 1;
 
-   if (wm_iz_table[lookup].sd_present) {
+   if (wm_iz_table[lookup].sd_present || ps_uses_depth) {
       key->source_depth_reg = reg;
       reg += 2;
    }