Mesa (master): i965: be clear that the Fallback field is a boolean, not a bitfield

[Brian Paul]

Module: Mesa
Branch: master
Commit: e9b17d6477f99838fc7f261ea1b8d47eea12f42f
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=e9b17d6477f99838fc7f261ea1b8d47eea12f42f

Author: Brian Paul <brianp at vmware.com>
Date:   Tue Oct 27 09:31:31 2009 -0600

i965: be clear that the Fallback field is a boolean, not a bitfield

---

 src/mesa/drivers/dri/i965/brw_draw_upload.c  |    4 ++--
 src/mesa/drivers/dri/i965/brw_fallback.c     |    6 +++++-
 src/mesa/drivers/dri/i965/brw_state_upload.c |    2 +-
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_draw_upload.c b/src/mesa/drivers/dri/i965/brw_draw_upload.c
index a3ff6c5..0fefbd9 100644
--- a/src/mesa/drivers/dri/i965/brw_draw_upload.c
+++ b/src/mesa/drivers/dri/i965/brw_draw_upload.c
@@ -375,7 +375,7 @@ static void brw_prepare_vertices(struct brw_context *brw)
     * isn't an issue at this point.
     */
    if (brw->vb.nr_enabled >= BRW_VEP_MAX) {
-      intel->Fallback = 1;
+      intel->Fallback = GL_TRUE; /* boolean, not bitfield */
       return;
    }
 
@@ -427,7 +427,7 @@ static void brw_prepare_vertices(struct brw_context *brw)
 	    /* Position array not properly enabled:
 	     */
             if (input->glarray->StrideB == 0) {
-               intel->Fallback = 1;
+               intel->Fallback = GL_TRUE; /* boolean, not bitfield */
                return;
             }
 
diff --git a/src/mesa/drivers/dri/i965/brw_fallback.c b/src/mesa/drivers/dri/i965/brw_fallback.c
index d27c6c2..562a178 100644
--- a/src/mesa/drivers/dri/i965/brw_fallback.c
+++ b/src/mesa/drivers/dri/i965/brw_fallback.c
@@ -133,7 +133,11 @@ const struct brw_tracked_state brw_check_fallback = {
 
 
 
-/* Not used:
+/**
+ * Called by the INTEL_FALLBACK() macro.
+ * NOTE: this is a no-op for the i965 driver.  The brw->intel.Fallback
+ * field is treated as a boolean, not a bitmask.  It's only set in a
+ * couple of places.
  */
 void intelFallback( struct intel_context *intel, GLuint bit, GLboolean mode )
 {
diff --git a/src/mesa/drivers/dri/i965/brw_state_upload.c b/src/mesa/drivers/dri/i965/brw_state_upload.c
index b817b74..ee447af 100644
--- a/src/mesa/drivers/dri/i965/brw_state_upload.c
+++ b/src/mesa/drivers/dri/i965/brw_state_upload.c
@@ -308,7 +308,7 @@ void brw_validate_state( struct brw_context *brw )
    if (brw->state.dirty.brw & BRW_NEW_CONTEXT)
       brw_clear_batch_cache(brw);
 
-   brw->intel.Fallback = 0;
+   brw->intel.Fallback = GL_FALSE; /* boolean, not bitfield */
 
    /* do prepare stage for all atoms */
    for (i = 0; i < Elements(atoms); i++) {