i965: Fix extending VB packets

Computation of the delta of this array from the last had a silly little
bug and ignored any initial delta==0 causing grief in Nexuiz and
friends.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/src/mesa/drivers/dri/i965/brw_draw_upload.c b/src/mesa/drivers/dri/i965/brw_draw_upload.c
index 4478ef9..e96c32a 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_draw_upload.c
+++ b/src/mesa/drivers/dri/i965/brw_draw_upload.c
@@ -484,7 +484,7 @@ static void brw_prepare_vertices(struct brw_context *brw)
    }
 
    /* can we simply extend the current vb? */
-   if (0 && j == brw->vb.nr_current_buffers) {
+   if (j == brw->vb.nr_current_buffers) {
       int delta = 0;
       for (i = 0; i < j; i++) {
         int d;
@@ -494,7 +494,7 @@ static void brw_prepare_vertices(struct brw_context *brw)
            break;
 
         d = brw->vb.buffers[i].offset - brw->vb.current_buffers[i].offset;
-        if (delta == 0)
+        if (i == 0)
            delta = d / brw->vb.current_buffers[i].stride;
         if (delta * brw->vb.current_buffers[i].stride != d)
            break;