--- a/src/main/java/com/glavsoft/rfb/encoding/decoder/ZRLEDecoder.java	Fri Feb 21 18:20:36 2020 +0900
+++ b/src/main/java/com/glavsoft/rfb/encoding/decoder/ZRLEDecoder.java	Sat Feb 22 01:54:33 2020 +0900
@@ -101,6 +101,7 @@
 				deflater.deflate(c1);
 				flushMuticast(rfb, bytes);
 			}
+			System.out.println("blocking "+rect);
 			return;
 		}
 
@@ -208,13 +209,13 @@
 					boolean end = flushDeflator(false," end of phase 0 ");
 					width = 0;
 					flushRectangle(c1rect,c1.position());
-					if (end) {
+					c1rect = new FramebufferUpdateRectangle(rect.x,c1rect.y+tileH,0,0);
+					if (end || c1rect.y + tileY >= rect.y+rect.height) {
 						flushMuticast(rfb,bytes);
 						return;
 					}
 					c1.position(c1.position()+ RECT_HEADER_SIZE); // header space
 					prevC1Offset = c1.position();
-					c1rect = new FramebufferUpdateRectangle(rect.x,c1rect.y+tileH,0,0);
 				}
 			} else {  // phase 1
 				if (width >= rect.width) { // next line
@@ -227,7 +228,7 @@
 						c0rect = c1rect;
 					}
 					c1rect = new FramebufferUpdateRectangle(rect.x, c0rect.y+c0rect.height, 0, 0);
-					if (end) {
+					if (end || c1rect.y + tileY >= rect.y+rect.height) {
 						c0rect = null; // next will be first phase 1 case
 						flushMuticast(rfb,bytes);
 						return;
@@ -279,6 +280,8 @@
 		private void flushRectangle(FramebufferUpdateRectangle rect,int pos) {
 			if (rect.width==0) return;
 			System.out.println("sending broadcast" + rect);
+			if (rect.y >= this.rect.y+this.rect.height)
+				System.out.println("over y broadcast" + this.rect);
 			c1.putShort(prevC1Offset - 16, (short) rect.x);
 			c1.putShort(prevC1Offset - 14, (short) rect.y);
 			c1.putShort(prevC1Offset - 12, (short) rect.width);