Mesa-dri.patch

   1 commit 2407e48f2805e27e76e2e1d7083926c4077d9032
   2 Author: Xiang, Haihao <haihao.xiang@intel.com>
   3 Date:   Wed Dec 5 10:31:35 2007 +0800
   4
   5     Don't Swap buffer if a DRIDrawable is entirely obscured
   6     by another window.
   7
   8 diff --git a/src/mesa/drivers/dri/common/dri_util.c b/src/mesa/drivers/dri/common/dri_util.c
   9 index 2e2e64c..2b378a5 100644
  10 --- a/src/mesa/drivers/dri/common/dri_util.c
  11 +++ b/src/mesa/drivers/dri/common/dri_util.c
  12 @@ -336,6 +336,9 @@ static void driSwapBuffers(__DRIdrawable *drawable)
  13      __DRIdrawablePrivate *dPriv = drawable->private;
  14      drm_clip_rect_t rect;
  15
  16 +    if (!dPriv->numClipRects)
  17 +        return;
  18 +
  19      dPriv->swapBuffers(dPriv);
  20
  21      /* Check that we actually have the new damage report method */