Mesa (master): i965: fix hacked Fallback usage in brw_prepare_vertices()

[Brian Paul]

Module: Mesa
Branch: master
Commit: 8810b8f67135185d1044746bb861fe2ff997626c
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=8810b8f67135185d1044746bb861fe2ff997626c

Author: Brian Paul <brianp at vmware.com>
Date:   Thu Oct 22 16:45:50 2009 -0600

i965: fix hacked Fallback usage in brw_prepare_vertices()

Setting intel->Fallback = 1 clobbered any fallback state that was already
set.  Not sure where this hack originated (the git history is a little
convoluted).  Define and use a new BRW_FALLBACK_DRAW bit instead.  This
shouldn't break anything and could potentially fix some bugs (but no
specific ones are known).

---

 src/mesa/drivers/dri/i965/brw_context.h     |    2 ++
 src/mesa/drivers/dri/i965/brw_draw_upload.c |    6 ++++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index da0e091..b1e7ec8 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -116,6 +116,8 @@
  */
 
 
+#define BRW_FALLBACK_DRAW  (INTEL_FALLBACK_DRIVER << 0)
+
 #define BRW_MAX_CURBE                    (32*16)
 
 struct brw_context;
diff --git a/src/mesa/drivers/dri/i965/brw_draw_upload.c b/src/mesa/drivers/dri/i965/brw_draw_upload.c
index 9d089e1..4f8ceb3 100644
--- a/src/mesa/drivers/dri/i965/brw_draw_upload.c
+++ b/src/mesa/drivers/dri/i965/brw_draw_upload.c
@@ -375,9 +375,10 @@ 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;
+      FALLBACK(intel, BRW_FALLBACK_DRAW, GL_TRUE);
       return;
    }
+   FALLBACK(intel, BRW_FALLBACK_DRAW, GL_FALSE);
 
    for (i = 0; i < brw->vb.nr_enabled; i++) {
       struct brw_vertex_element *input = brw->vb.enabled[i];
@@ -427,9 +428,10 @@ static void brw_prepare_vertices(struct brw_context *brw)
 	    /* Position array not properly enabled:
 	     */
             if (input->glarray->StrideB == 0) {
-               intel->Fallback = 1;
+               FALLBACK(intel, BRW_FALLBACK_DRAW, GL_TRUE);
                return;
             }
+            FALLBACK(intel, BRW_FALLBACK_DRAW, GL_FALSE);
 
 	    interleave = input->glarray->StrideB;
 	    ptr = input->glarray->Ptr;