--- a/src/main/java/jp/ac/u_ryukyu/treevnc/TreeRFBProto.java	Sun Feb 17 17:55:25 2019 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/treevnc/TreeRFBProto.java	Sun Feb 17 18:39:28 2019 +0900
@@ -770,7 +770,7 @@
         int x = rect.x, y = rect.y, w = 0,  h = 0, w0 = 0, h0 = 0;
         deflater.setInput(bytes,prevoffset,span);
         c1rect.height = tiley;
-        if (c1.remaining() < span || x + tilex >= rect.x + rect.width ) {
+        if (c1.remaining() < span || c1rect.x + c1rect.width + tilex >= rect.x + rect.width ) {
             deflater.deflate(c1, Deflater.FULL_FLUSH);
             c1.flip();
             try {
@@ -778,16 +778,17 @@
             } catch (InterruptedException e) {
                 e.printStackTrace();
             }
+            c1rect.x += c1rect.width;
+            if (c1rect.x >= rect.x + rect.width) {
+                c1rect.x = rect.x;
+                c1rect.y += tiley;
+            }
+            c1rect.width = 0;
             c1 = multicastqueue.allocate(deflate_size);
         } else {
             deflater.deflate(c1, Deflater.SYNC_FLUSH);
         }
         c1rect.width += tilex;
-        if (c1rect.width >= rect.width) {
-            c1rect.width = 0;
-            c1rect.x = 0;
-            c1rect.y += tiley;
-        }
     }
 
     private void writeUpdateRectangleWithHeader(ByteBuffer c1, ByteBuffer header, int len2, int x, int y, int w, int h) throws InterruptedException {