// 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 vncclient.vnc;
import common.ScreenDescription;
import streamer.BaseElement;
import streamer.ByteBuffer;
import streamer.Element;
import streamer.Link;
import streamer.Pipeline;
import streamer.PipelineImpl;
import streamer.debug.MockSink;
import streamer.debug.MockSource;
public class FrameBufferUpdateRequest extends BaseElement {
// TODO: use object with fields instead of raw values in map
public static final String INCREMENTAL_UPDATE = "incremental";
public static final String TARGET_X = "x";
public static final String TARGET_Y = "y";
public static final String WIDTH = "width";
public static final String HEIGHT = "height";
protected ScreenDescription screen;
public FrameBufferUpdateRequest(String id, ScreenDescription screen) {
super(id);
this.screen = screen;
}
@Override
public void handleData(ByteBuffer buf, Link link) {
if (buf == null)
return;
if (verbose)
System.out.println("[" + this + "] INFO: Data received: " + buf + ".");
Boolean incremental = (Boolean)buf.getMetadata(INCREMENTAL_UPDATE);
Integer x = (Integer)buf.getMetadata(TARGET_X);
Integer y = (Integer)buf.getMetadata(TARGET_Y);
Integer width = (Integer)buf.getMetadata(WIDTH);
Integer height = (Integer)buf.getMetadata(HEIGHT);
buf.unref();
// Set default values when parameters are not set
if (incremental == null)
incremental = false;
if (x == null)
x = 0;
if (y == null)
y = 0;
if (width == null)
width = screen.getFramebufferWidth();
if (height == null)
height = screen.getFramebufferHeight();
ByteBuffer outBuf = new ByteBuffer(10);
outBuf.writeByte(RfbConstants.CLIENT_FRAMEBUFFER_UPDATE_REQUEST);
outBuf.writeByte((incremental) ? RfbConstants.FRAMEBUFFER_INCREMENTAL_UPDATE_REQUEST : RfbConstants.FRAMEBUFFER_FULL_UPDATE_REQUEST);
outBuf.writeShort(x);
outBuf.writeShort(y);
outBuf.writeShort(width);
outBuf.writeShort(height);
if (verbose) {
outBuf.putMetadata("sender", this);
outBuf.putMetadata("dimensions", width + "x" + height + "@" + x + "x" + y);
}
pushDataToAllOuts(outBuf);
}
public static void main(String args[]) {
System.setProperty("streamer.Element.debug", "true");
ScreenDescription screen = new ScreenDescription();
screen.setFramebufferSize(120, 80);
Element adapter = new FrameBufferUpdateRequest("renderer", screen);
Element sink = new MockSink("sink", ByteBuffer.convertByteArraysToByteBuffers(new byte[] {
// Request
RfbConstants.CLIENT_FRAMEBUFFER_UPDATE_REQUEST,
// Full update (redraw area)
RfbConstants.FRAMEBUFFER_FULL_UPDATE_REQUEST,
// X
0, 1,
// Y
0, 2,
// Width
0, 3,
// Height
0, 4}));
ByteBuffer buf = new ByteBuffer(new byte[0]);
buf.putMetadata(TARGET_X, 1);
buf.putMetadata(TARGET_Y, 2);
buf.putMetadata(WIDTH, 3);
buf.putMetadata(HEIGHT, 4);
Element source = new MockSource("source", new ByteBuffer[] {buf});
Pipeline pipeline = new PipelineImpl("test");
pipeline.addAndLink(source, adapter, sink);
pipeline.runMainLoop("source", STDOUT, false, false);
}
}