Mesa (master): softpipe: new comment and assertion for face value

[Brian Paul]

Module: Mesa
Branch: master
Commit: 8fd0e453d7ccae2bf71573e99ba486e99b0c6882
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=8fd0e453d7ccae2bf71573e99ba486e99b0c6882

Author: Brian Paul <brianp at vmware.com>
Date:   Sun Apr 18 10:01:04 2010 -0600

softpipe: new comment and assertion for face value

---

 src/gallium/drivers/softpipe/sp_quad_depth_test.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/gallium/drivers/softpipe/sp_quad_depth_test.c b/src/gallium/drivers/softpipe/sp_quad_depth_test.c
index 4ee3196..72117c2 100644
--- a/src/gallium/drivers/softpipe/sp_quad_depth_test.c
+++ b/src/gallium/drivers/softpipe/sp_quad_depth_test.c
@@ -520,6 +520,9 @@ depth_stencil_test_quad(struct quad_stage *qs,
       face = 0;
    }
 
+   /* 0 = front-face, 1 = back-face */
+   assert(face == 0 || face == 1);
+
    /* choose front or back face function, operator, etc */
    /* XXX we could do these initializations once per primitive */
    func    = softpipe->depth_stencil->stencil[face].func;