plug in BlitFramebuffer function
diff --git a/src/mesa/drivers/common/driverfuncs.c b/src/mesa/drivers/common/driverfuncs.c
index 9fe4ee3..7f577b6 100644
--- a/src/mesa/drivers/common/driverfuncs.c
+++ b/src/mesa/drivers/common/driverfuncs.c
@@ -210,6 +210,10 @@
driver->FramebufferRenderbuffer = _mesa_framebuffer_renderbuffer;
#endif
+#if FEATURE_EXT_framebuffer_blit
+ driver->BlitFramebuffer = _swrast_BlitFramebuffer;
+#endif
+
/* query objects */
driver->NewQueryObject = _mesa_new_query_object;
driver->BeginQuery = NULL;