// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
package com.cloud.consoleproxy.vnc.packet.server;
import java.io.DataInputStream;
import java.io.IOException;
import com.cloud.consoleproxy.ConsoleProxyClientListener;
import com.cloud.consoleproxy.vnc.BufferedImageCanvas;
import com.cloud.consoleproxy.vnc.RfbConstants;
import com.cloud.consoleproxy.vnc.VncScreenDescription;
import com.cloud.consoleproxy.vnc.packet.server.CopyRect;
import com.cloud.consoleproxy.vnc.packet.server.RawRect;
import com.cloud.consoleproxy.vnc.packet.server.Rect;
public class FramebufferUpdatePacket {
private final VncScreenDescription screen;
private final BufferedImageCanvas canvas;
private final ConsoleProxyClientListener clientListener;
public FramebufferUpdatePacket(BufferedImageCanvas canvas, VncScreenDescription screen, DataInputStream is, ConsoleProxyClientListener clientListener) throws IOException {
this.screen = screen;
this.canvas = canvas;
this.clientListener = clientListener;
readPacketData(is);
}
private void readPacketData(DataInputStream is) throws IOException {
is.skipBytes(1);// Skip padding
// Read number of rectangles
int numberOfRectangles = is.readUnsignedShort();
// For all rectangles
for (int i = 0; i < numberOfRectangles; i++) {
// Read coordinate of rectangle
int x = is.readUnsignedShort();
int y = is.readUnsignedShort();
int width = is.readUnsignedShort();
int height = is.readUnsignedShort();
int encodingType = is.readInt();
// Process rectangle
Rect rect;
switch (encodingType) {
case RfbConstants.ENCODING_RAW: {
rect = new RawRect(screen, x, y, width, height, is);
break;
}
case RfbConstants.ENCODING_COPY_RECT: {
rect = new CopyRect(x, y, width, height, is);
break;
}
case RfbConstants.ENCODING_DESKTOP_SIZE: {
rect = new FrameBufferSizeChangeRequest(canvas, width, height);
if (this.clientListener != null)
this.clientListener.onFramebufferSizeChange(width, height);
break;
}
default:
throw new RuntimeException("Unsupported ecnoding: " + encodingType);
}
paint(rect, canvas);
if (this.clientListener != null)
this.clientListener.onFramebufferUpdate(rect.getX(), rect.getY(), rect.getWidth(), rect.getHeight());
}
}
public void paint(Rect rect, BufferedImageCanvas canvas) {
// Draw rectangle on offline buffer
rect.paint(canvas.getOfflineImage(), canvas.getOfflineGraphics());
// Request update of repainted area
canvas.repaint(rect.getX(), rect.getY(), rect.getWidth(), rect.getHeight());
}
}