--- a/Renderer/Engine/task/DrawSpan.cc	Tue May 25 19:14:44 2010 +0900
+++ b/Renderer/Engine/task/DrawSpan.cc	Fri May 28 01:47:42 2010 +0900
@@ -462,6 +462,23 @@
 static int
 run(SchedTask *smanager, void *rbuf, void *wbuf)
 {
+
+
+  if ((int)smanager->get_param(5) == 0) {
+
+    int rangex_start = (long)smanager->get_param(2);
+    int rangex_end   = (long)smanager->get_param(3);
+
+    int rangex = rangex_end - rangex_start + 1;
+    int rangey = (long)smanager->get_param(4);
+
+    linebuf_init(smanager, rangex, rangey, 0);
+
+    return 0;
+
+  }
+
+
     G g0;
     Gptr g = &g0;