mirror of
https://github.com/xcp-ng/xenadmin.git
synced 2024-11-23 12:30:50 +01:00
1435 lines
50 KiB
C#
1435 lines
50 KiB
C#
/* Copyright (c) Cloud Software Group, Inc.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using System.Threading;
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using System.IO;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.Text;
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using System.Text.RegularExpressions;
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using System.Runtime.InteropServices;
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using System.Security.Cryptography;
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using XenCenterLib;
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namespace DotNetVnc
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{
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public class VNCStream
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{
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private const int RAW_ENCODING = 0;
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private const int COPY_RECTANGLE_ENCODING = 1;
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private const int RRE_ENCODING = 2;
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private const int CORRE_ENCODING = 4;
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private const int HEXTILE_ENCODING = 5;
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private const int CURSOR_PSEUDO_ENCODING = -239;
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private const int DESKTOP_SIZE_PSEUDO_ENCODING = -223;
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private const int XENCENTER_ENCODING = -254;
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private const int QEMU_EXT_KEY_ENCODING = -258;
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private const int SET_PIXEL_FORMAT = 0;
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private const int SET_ENCODINGS = 2;
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private const int FRAMEBUFFER_UPDATE_REQUEST = 3;
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private const int KEY_EVENT = 4;
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private const int KEY_SCAN_EVENT = 254;
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private const int QEMU_MSG = 255;
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private const int POINTER_EVENT = 5;
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private const int CLIENT_CUT_TEXT = 6;
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private const int RAW_SUBENCODING = 1;
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private const int BACKGROUND_SPECIFIED_SUBENCODING = 2;
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private const int FOREGROUND_SPECIFIED_SUBENCODING = 4;
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private const int ANY_SUBRECTS_SUBENCODING = 8;
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private const int SUBRECTS_COLORED_SUBENCODING = 16;
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private const int FRAME_BUFFER_UPDATE = 0;
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private const int BELL = 2;
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private const int SERVER_CUT_TEXT = 3;
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private const int QEMU_EXT_KEY_EVENT = 0;
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private static readonly log4net.ILog Log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
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private Thread thread;
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#region Current color properties
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private int bitsPerPixel;
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private int bytesPerPixel;
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private int depth;
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private bool bigEndian;
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private bool trueColor;
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private int redMax;
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private int greenMax;
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private int blueMax;
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private int redMaxPlus1;
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private int greenMaxPlus1;
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private int blueMaxPlus1;
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private int redMaxOver2;
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private int greenMaxOver2;
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private int blueMaxOver2;
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private int redShift;
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private int greenShift;
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private int blueShift;
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private bool rgb565;
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#endregion
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/// <summary>
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/// This event will be fired when an error occurs. The helper thread is guaranteed to be
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/// closing down at this point.
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/// </summary>
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public event Action<object,Exception> ErrorOccurred;
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public event EventHandler ConnectionSuccess;
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/// <summary>
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/// The encodings used. Note that these are ordered: preferred encoding first.
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/// </summary>
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private static readonly int[] encodings = {
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CORRE_ENCODING,
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RRE_ENCODING,
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COPY_RECTANGLE_ENCODING,
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RAW_ENCODING,
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CURSOR_PSEUDO_ENCODING,
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DESKTOP_SIZE_PSEUDO_ENCODING,
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XENCENTER_ENCODING,
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QEMU_EXT_KEY_ENCODING
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};
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private readonly IVNCGraphicsClient client;
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private readonly MyStream stream;
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private readonly object writeLock = new object();
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private readonly object pauseMonitor = new object();
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private volatile bool running = true;
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private bool paused;
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private int _width;
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private int _height;
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private bool _incremental;
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private bool qemu_ext_key_encoding;
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private PixelFormat pixelFormat;
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private PixelFormat pixelFormatCursor;
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private byte[] _data = new byte[1228800]; //640*480*32bpp
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private byte[] data_8bpp;
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private readonly long imageUpdateThreshold;
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public readonly object updateMonitor = new object();
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[System.Diagnostics.CodeAnalysis.SuppressMessage("csharpsquid",
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"S5547:Cipher algorithms should be robust",
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Justification = "Needed by the server side.")]
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private DESCryptoServiceProvider des = new DESCryptoServiceProvider
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{
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Padding = PaddingMode.None,
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Mode = CipherMode.ECB
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};
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public VNCStream(IVNCGraphicsClient client, Stream stream, bool startPaused)
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{
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this.client = client;
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this.stream = new MyStream(stream);
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paused = startPaused;
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if (!Win32.QueryPerformanceFrequency(out var freq))
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{
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System.Diagnostics.Trace.Assert(false);
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}
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imageUpdateThreshold = freq / 3;
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}
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public void Connect(char[] password)
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{
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System.Diagnostics.Trace.Assert(thread == null);
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thread = new Thread(Run)
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{
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Name = $"VNC connection to {client.VmName} - {client.UUID}",
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IsBackground = true
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};
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thread.Start(password);
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}
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private void CheckProtocolVersion()
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{
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byte[] buffer = new byte[12];
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stream.readFully(buffer, 0, 12);
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char[] chars = new char[12];
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Encoding.ASCII.GetDecoder().GetChars(buffer, 0, 12, chars, 0);
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String s = new String(chars);
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Regex regex = new Regex("RFB ([0-9]{3})\\.([0-9]{3})\n");
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Match match = regex.Match(s);
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if (!match.Success)
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throw new VNCException("Unexpected protocol version " + s);
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int major = Int32.Parse(match.Groups[1].Value);
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int minor = Int32.Parse(match.Groups[2].Value);
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if (major < 3)
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throw new VNCException($"Unsupported protocol version {major}.{minor}");
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}
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private void SendProtocolVersion()
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{
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lock (writeLock)
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{
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byte[] bytes = Encoding.ASCII.GetBytes("RFB 003.003\n");
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stream.Write(bytes, 0, bytes.Length);
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stream.Flush();
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}
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}
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private void ReadPixelFormat()
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{
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bitsPerPixel = stream.readCard8();
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depth = stream.readCard8();
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bigEndian = stream.readFlag();
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trueColor = stream.readFlag();
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redMax = stream.readCard16();
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greenMax = stream.readCard16();
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blueMax = stream.readCard16();
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redShift = stream.readCard8();
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greenShift = stream.readCard8();
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blueShift = stream.readCard8();
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stream.readPadding(3);
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Log.Debug("readPixelFormat " + bitsPerPixel + " " + depth);
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}
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private void WritePixelFormat()
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{
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Log.Debug("writePixelFormat " + bitsPerPixel + " " + depth);
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stream.writeInt8(SET_PIXEL_FORMAT);
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stream.writePadding(3);
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stream.writeInt8(bitsPerPixel);
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stream.writeInt8(depth);
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stream.writeFlag(bigEndian);
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stream.writeFlag(trueColor);
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stream.writeInt16(redMax);
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stream.writeInt16(greenMax);
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stream.writeInt16(blueMax);
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stream.writeInt8(redShift);
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stream.writeInt8(greenShift);
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stream.writeInt8(blueShift);
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stream.writePadding(3);
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}
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private void Force32bpp()
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{
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Log.Debug("force32bpp()");
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bitsPerPixel = 32;
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depth = 24;
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trueColor = true;
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redMax = 255;
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greenMax = 255;
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blueMax = 255;
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redShift = 16;
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greenShift = 8;
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blueShift = 0;
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// Note that we keep the endian value from the server.
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SetupPixelFormat();
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lock (writeLock)
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{
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WritePixelFormat();
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}
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}
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private void SetupPixelFormat()
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{
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Log.Debug("setupPixelFormat(" + bitsPerPixel + ")");
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bytesPerPixel = bitsPerPixel >> 3;
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redMaxPlus1 = redMax + 1;
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greenMaxPlus1 = greenMax + 1;
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blueMaxPlus1 = blueMax + 1;
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redMaxOver2 = redMax >> 1;
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greenMaxOver2 = greenMax >> 1;
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blueMaxOver2 = blueMax >> 1;
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if (bitsPerPixel == 32 || bitsPerPixel == 8)
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{
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pixelFormat = PixelFormat.Format32bppRgb;
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pixelFormatCursor = PixelFormat.Format32bppArgb;
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}
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else if (bitsPerPixel == 16)
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{
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rgb565 = redShift == 11;
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pixelFormat =
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rgb565 ?
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PixelFormat.Format16bppRgb565 :
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PixelFormat.Format16bppRgb555;
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pixelFormatCursor = PixelFormat.Format16bppArgb1555;
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}
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else
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{
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throw new IOException("unexpected bits per pixel: " + bitsPerPixel);
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}
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}
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private void WriteSetEncodings()
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{
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Log.Debug("writeSetEncodings");
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stream.writeInt8(SET_ENCODINGS);
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stream.writePadding(1);
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stream.writeInt16(encodings.Length);
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foreach (var encoding in encodings)
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stream.writeInt32(encoding);
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}
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private void WriteFramebufferUpdateRequest(int x, int y, int width, int height, bool incremental)
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{
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stream.writeInt8(FRAMEBUFFER_UPDATE_REQUEST);
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stream.writeFlag(incremental);
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stream.writeInt16(x);
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stream.writeInt16(y);
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stream.writeInt16(width);
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stream.writeInt16(height);
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}
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private void AuthenticationExchange(char[] password)
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{
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Log.Debug("authenticationExchange");
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int scheme = stream.readCard32();
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switch (scheme)
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{
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case 0:
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var reason = stream.readString();
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throw new VNCException("connection failed: " + reason);
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case 1:
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// no authentication needed
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break;
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case 2:
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PasswordAuthentication(password);
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break;
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default:
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throw new VNCException("unexpected authentication scheme: " + scheme);
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}
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}
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private void PasswordAuthentication(char[] password)
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{
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byte[] keyBytes = new byte[8];
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for (int i = 0; i < 8 && i < password.Length; ++i)
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keyBytes[i] = Reverse((byte)password[i]);
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ICryptoTransform cipher = des.CreateEncryptor(keyBytes, null);
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byte[] challenge = new byte[16];
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stream.readFully(challenge, 0, 16);
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byte[] response = cipher.TransformFinalBlock(challenge, 0, 16);
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stream.Write(response, 0, 16);
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stream.Flush();
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int status = stream.readCard32();
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switch (status)
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{
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case 0:
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break;
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case 1:
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case 2:
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throw new VNCAuthenticationException();
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default:
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throw new VNCException("Bad Authentication Response");
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}
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}
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private static byte Reverse(byte v)
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{
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byte r = 0;
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if ((v & 0x01) != 0) r |= 0x80;
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if ((v & 0x02) != 0) r |= 0x40;
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if ((v & 0x04) != 0) r |= 0x20;
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if ((v & 0x08) != 0) r |= 0x10;
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if ((v & 0x10) != 0) r |= 0x08;
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if ((v & 0x20) != 0) r |= 0x04;
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if ((v & 0x40) != 0) r |= 0x02;
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if ((v & 0x80) != 0) r |= 0x01;
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return r;
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}
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private void InitializeClient()
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{
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Log.Debug("clientInitialisation");
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lock (writeLock)
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{
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stream.writeFlag(true); // shared
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stream.Flush();
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}
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}
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private void InitializateServer()
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{
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Log.Debug("serverInitialisation");
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int width = stream.readCard16();
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int height = stream.readCard16();
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ReadPixelFormat();
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stream.readString(); /* The desktop name -- we don't care. */
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if (trueColor)
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{
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SetupPixelFormat();
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lock (writeLock)
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{
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WritePixelFormat();
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}
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}
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else
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{
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Force32bpp();
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}
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DesktopSize(width, height);
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lock (writeLock)
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{
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WriteSetEncodings();
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}
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}
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/**
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* Expects to be lock on writeLock.
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*/
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private void WriteKey(int command, bool down, int key)
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{
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stream.writeInt8(command); //Send Scancodes
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stream.writeFlag(down);
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stream.writePadding(2);
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stream.writeInt32(key);
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}
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private void WriteQemuExtKey(int command, bool down, int key, int sym)
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{
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stream.writeInt8(command);
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stream.writeInt8(QEMU_EXT_KEY_EVENT);
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stream.writePadding(1);
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stream.writeFlag(down);
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stream.writeInt32(sym);
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stream.writeInt32(key);
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}
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/**
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* use_qemu_ext_key_encoding: Dictates if we want to use QEMU_EXT_KEY encoding.
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*
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* XS6.2 doesn't properly support QEMU_EXT_KEY and XS6.5 supports QEMU_EXT_KEY encoding
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* only if XS65ESP1051 is applied, so restrict QEMU_EXT_KEY encoding to Inverness and above.
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*/
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public void keyScanEvent(bool down, int key, int sym, bool use_qemu_ext_key_encoding)
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{
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lock (writeLock)
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{
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try
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{
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if (qemu_ext_key_encoding && use_qemu_ext_key_encoding)
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{
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WriteQemuExtKey(QEMU_MSG, down, key, sym);
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}
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else
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{
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WriteKey(KEY_SCAN_EVENT, down, key);
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}
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stream.Flush();
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}
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catch (IOException e)
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{
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Log.Warn(e, e);
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}
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}
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}
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public void keyCodeEvent(bool down, int key)
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{
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lock (writeLock)
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{
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try
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{
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WriteKey(KEY_EVENT, down, key);
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stream.Flush();
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}
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catch (IOException e)
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{
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Log.Warn(e, e);
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}
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}
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}
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public void PointerEvent(int buttonMask, int x, int y)
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{
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if (x < 0)
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{
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x = 0;
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}
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else if (x >= _width)
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{
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x = _width - 1;
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}
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if (y < 0)
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{
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y = 0;
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}
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else if (y >= _height)
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{
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y = _height - 1;
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}
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lock (writeLock)
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{
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try
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{
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PointerEvent_(buttonMask, x, y);
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stream.Flush();
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}
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catch (IOException e)
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{
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Log.Warn(e, e);
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}
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}
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}
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public void PointerWheelEvent(int x, int y, int r)
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{
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lock (writeLock)
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{
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try
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{
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/*
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The RFB protocol specifies a down-up pair for each
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scroll of the wheel, on button 4 for scrolling up, and
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button 5 for scrolling down.
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*/
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int m;
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if (r < 0)
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{
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r = -r;
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m = 8;
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}
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else
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{
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m = 16;
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}
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for (int i = 0; i < r; i++)
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{
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PointerEvent_(m, x, y);
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PointerEvent_(0, x, y);
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}
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stream.Flush();
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}
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catch (IOException e)
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{
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Log.Warn(e, e);
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}
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}
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}
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private void PointerEvent_(int buttonMask, int x, int y)
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{
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stream.writeInt8(POINTER_EVENT);
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stream.writeInt8(buttonMask);
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stream.writeInt16(x);
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stream.writeInt16(y);
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}
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public void ClientCutText(string text)
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{
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Log.Debug("cutEvent");
|
|
|
|
lock (writeLock)
|
|
{
|
|
try
|
|
{
|
|
stream.writeInt8(CLIENT_CUT_TEXT);
|
|
stream.writePadding(3);
|
|
stream.writeString(text);
|
|
stream.Flush();
|
|
}
|
|
catch (IOException e)
|
|
{
|
|
Log.Warn(e, e);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates an image in place in this.data. It expects the pixel data to already be in this.data.
|
|
/// </summary>
|
|
/// <param name="width"></param>
|
|
/// <param name="height"></param>
|
|
/// <param name="x"></param>
|
|
/// <param name="y"></param>
|
|
/// <param name="start">the start of image data in this.data</param>
|
|
/// <param name="length">the length of image data in this data</param>
|
|
/// <param name="maskLength">length of cursor mask (after the image in this.data), as specified by
|
|
/// the RFB protocol specification for the Cursor pseudo-encoding (1-bpp, packed). If 0,
|
|
/// the mask is assumed to be totally opaque (as used by normal "raw" packets). Masks are not
|
|
/// supported for 8-bpp images.</param>
|
|
/// <param name="cursor"></param>
|
|
private void CreateImage(int width, int height, int x, int y, int start, int length, int maskLength, bool cursor)
|
|
{
|
|
if (width == 0 || height == 0)
|
|
return;
|
|
|
|
byte[] dataToRender;
|
|
int stride;
|
|
|
|
if (bitsPerPixel == 32)
|
|
{
|
|
stride = width * 4;
|
|
dataToRender = _data;
|
|
|
|
System.Diagnostics.Debug.Assert(length == height * stride);
|
|
|
|
if (cursor)
|
|
{
|
|
// for mask
|
|
int j = 0; // bit within the current byte (k)
|
|
int k = start + length; //byte
|
|
int m = 0; // bit within the current row
|
|
|
|
for (int i = start; i < start + length; i += 4)
|
|
{
|
|
bool mask = (_data[k] & (1 << (7 - j))) == 0;
|
|
_data[i + 3] = (byte)(mask ? 0 : 0xff);
|
|
|
|
j++;
|
|
m++;
|
|
|
|
if (m == width)
|
|
{
|
|
j = 0;
|
|
m = 0;
|
|
k++;
|
|
}
|
|
else if (j > 7)
|
|
{
|
|
j = 0;
|
|
k++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else if (bitsPerPixel == 16)
|
|
{
|
|
// Bitmap requires that stride is a multiple of 4, so we
|
|
// will have to expand the data if width is odd.
|
|
bool expand_data = width % 2 == 1;
|
|
int stride_correction = expand_data ? 2 : 0;
|
|
stride = width * 2 + stride_correction;
|
|
dataToRender = expand_data ? new byte[stride * height] : _data;
|
|
|
|
System.Diagnostics.Debug.Assert(length == height * width * 2);
|
|
|
|
if (cursor)
|
|
{
|
|
int p = 0; // Byte within the destination data_to_render.
|
|
// for mask
|
|
int j = 0; // bit within the current byte (k)
|
|
int k = start + length; //byte
|
|
int m = 0; // bit within the current row
|
|
|
|
for (int i = start; i < start + length; i += 2)
|
|
{
|
|
bool mask = (_data[k] & (1 << (7 - j))) == 0;
|
|
byte mask_bit = (byte)(mask ? 0 : 0x80);
|
|
|
|
if (rgb565)
|
|
{
|
|
// Convert the 565 data into 1555.
|
|
dataToRender[p] = (byte)((_data[i] & 0x1f) | ((_data[i] & 0xe0) >> 1));
|
|
dataToRender[p + 1] = (byte)(((_data[i + 1] & 0x7) >> 1) | (_data[i + 1] & 0x78) | mask_bit);
|
|
}
|
|
else
|
|
{
|
|
// Add the mask bit -- everything else is OK because it's already 555.
|
|
dataToRender[p] = _data[i];
|
|
dataToRender[p + 1] = (byte)(_data[i + 1] | mask_bit);
|
|
}
|
|
|
|
j++;
|
|
m++;
|
|
p += 2;
|
|
|
|
if (m == width)
|
|
{
|
|
j = 0;
|
|
m = 0;
|
|
k++;
|
|
p += stride_correction;
|
|
}
|
|
else if (j > 7)
|
|
{
|
|
j = 0;
|
|
k++;
|
|
}
|
|
}
|
|
}
|
|
else if (expand_data)
|
|
{
|
|
int w2 = width * 2;
|
|
int i = start; // Byte within the source data.
|
|
int p = 0; // Byte within the destination data_to_render.
|
|
|
|
for (int m = 0; m < height; m++)
|
|
{
|
|
Array.Copy(_data, i, dataToRender, p, w2);
|
|
i += w2;
|
|
p += stride;
|
|
}
|
|
}
|
|
}
|
|
else if (bitsPerPixel == 8)
|
|
{
|
|
stride = width * 4;
|
|
dataToRender = data_8bpp;
|
|
|
|
System.Diagnostics.Debug.Assert(length == width * height);
|
|
|
|
// for mask
|
|
int j = 0; // bit within the current byte (k)
|
|
int k = start + length; //byte
|
|
int m = 0; // bit within the current row
|
|
|
|
for (int i = start, n = 0; i < start + length; i++, n += 4)
|
|
{
|
|
data_8bpp[n + 2] = (byte)(((((_data[i] >> redShift) & redMax) << 8) + redMaxOver2) / redMaxPlus1);
|
|
data_8bpp[n + 1] = (byte)(((((_data[i] >> greenShift) & greenMax) << 8) + greenMaxOver2) / greenMaxPlus1);
|
|
data_8bpp[n] = (byte)(((((_data[i] >> blueShift) & blueMax) << 8) + blueMaxOver2) / blueMaxPlus1);
|
|
if (cursor)
|
|
{
|
|
bool mask = (_data[k] & (1 << (7 - j))) == 0;
|
|
data_8bpp[n + 3] = (byte)(mask ? 0 : 0xff);
|
|
|
|
j++;
|
|
m++;
|
|
|
|
if (m == width)
|
|
{
|
|
j = 0;
|
|
m = 0;
|
|
k++;
|
|
}
|
|
else if (j > 7)
|
|
{
|
|
j = 0;
|
|
k++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
data_8bpp[n + 3] = 0;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
throw new Exception("unexpected bits per pixel");
|
|
}
|
|
|
|
BitmapToClient(width, height, x, y, start, stride, cursor, dataToRender);
|
|
}
|
|
|
|
private void BitmapToClient(int width, int height, int x, int y, int start, int stride, bool cursor, byte [] img)
|
|
{
|
|
GCHandle handle = GCHandle.Alloc(img, GCHandleType.Pinned);
|
|
try
|
|
{
|
|
IntPtr pointer = Marshal.UnsafeAddrOfPinnedArrayElement(img, start);
|
|
using (Bitmap bitmap = new Bitmap(width, height, stride, cursor ? pixelFormatCursor : pixelFormat, pointer))
|
|
{
|
|
if (cursor)
|
|
{
|
|
client.ClientSetCursor(bitmap, x, y, width, height);
|
|
}
|
|
else
|
|
{
|
|
client.ClientDrawImage(bitmap, x, y, width, height);
|
|
}
|
|
}
|
|
}
|
|
catch (ArgumentException exn)
|
|
{
|
|
Log.Error(exn, exn);
|
|
}
|
|
finally
|
|
{
|
|
handle.Free();
|
|
}
|
|
}
|
|
|
|
private void ReadRawEncoding(int x, int y, int width, int height)
|
|
{
|
|
ReadRawEncoding_(0, x, y, width, height, false);
|
|
}
|
|
|
|
/**
|
|
* @param mask If true, read a mask after the raw data, as used by the
|
|
* Cursor pseudo-encoding.
|
|
* @param start The position in this.data to start using
|
|
*/
|
|
private void ReadRawEncoding_(int start, int x, int y, int width, int height, bool cursor)
|
|
{
|
|
if (width < 0 || height < 0)
|
|
{
|
|
throw new VNCException("Invalid size: " + width + " x " +
|
|
height);
|
|
}
|
|
|
|
int length = width * height * bytesPerPixel;
|
|
if (_data.Length < start + length)
|
|
throw new VNCException("Server error: received rectangle bigger than desktop!");
|
|
stream.readFully(_data, start, length);
|
|
|
|
int maskLength = 0;
|
|
if (cursor)
|
|
{
|
|
// 1 bit mask.
|
|
int scanline = (width + 7) >> 3;
|
|
maskLength = scanline * height;
|
|
System.Diagnostics.Trace.Assert(_data.Length >= start + length + maskLength);
|
|
stream.readFully(_data, start + length, maskLength);
|
|
}
|
|
|
|
CreateImage(width, height, x, y, start, length, maskLength, cursor);
|
|
}
|
|
|
|
private void ReadCopyRectangleEncoding(int dx, int dy, int width, int height)
|
|
{
|
|
int x = stream.readCard16();
|
|
int y = stream.readCard16();
|
|
client.ClientCopyRectangle(x, y, width, height, dx, dy);
|
|
}
|
|
|
|
private Color ReadColor()
|
|
{
|
|
byte[] color = ReadColorBytes();
|
|
return Color.FromArgb(color[2], color[1], color[0]);
|
|
}
|
|
|
|
private byte[] ReadColorBytes(byte[] color, int start)
|
|
{
|
|
uint pixel;
|
|
switch (bitsPerPixel)
|
|
{
|
|
case 32:
|
|
pixel = (uint)(color[start] |
|
|
color[start + 1] << 8 |
|
|
color[start + 2] << 16 |
|
|
color[start + 3] << 24);
|
|
break;
|
|
case 16:
|
|
pixel = (uint)(color[start] |
|
|
color[start + 1] << 8);
|
|
break;
|
|
default:
|
|
pixel = color[start];
|
|
break;
|
|
}
|
|
|
|
byte[] newColor = new byte[4];
|
|
|
|
//ARGB Encoding
|
|
newColor[3] = 0xFF;
|
|
newColor[2] = (byte)(((((pixel >> redShift) & redMax) << 8) + redMaxOver2) / redMaxPlus1);
|
|
newColor[1] = (byte)(((((pixel >> greenShift) & greenMax) << 8) + greenMaxOver2) / greenMaxPlus1);
|
|
newColor[0] = (byte)(((((pixel >> blueShift) & blueMax) << 8) + blueMaxOver2) / blueMaxPlus1);
|
|
|
|
return newColor;
|
|
}
|
|
|
|
private byte[] ReadColorBytes()
|
|
{
|
|
int n = bitsPerPixel >> 3;
|
|
byte[] color = new byte[n];
|
|
|
|
stream.readFully(color, 0, n);
|
|
|
|
return ReadColorBytes(color, 0);
|
|
}
|
|
|
|
private void ReadRREEncoding(int x, int y, int width, int height)
|
|
{
|
|
int n = stream.readCard32();
|
|
Color background = ReadColor();
|
|
client.ClientFillRectangle(x, y, width, height, background);
|
|
for (int i = 0; i < n; ++i)
|
|
{
|
|
Color foreground = ReadColor();
|
|
int rx = stream.readCard16();
|
|
int ry = stream.readCard16();
|
|
int rw = stream.readCard16();
|
|
int rh = stream.readCard16();
|
|
client.ClientFillRectangle(x + rx, y + ry, rw, rh, foreground);
|
|
}
|
|
}
|
|
|
|
private void ReadCoRREEncoding(int x, int y, int width, int height)
|
|
{
|
|
int n = stream.readCard32();
|
|
Color background = ReadColor();
|
|
client.ClientFillRectangle(x, y, width, height, background);
|
|
for (int i = 0; i < n; ++i)
|
|
{
|
|
Color foreground = ReadColor();
|
|
int rx = stream.readCard8();
|
|
int ry = stream.readCard8();
|
|
int rw = stream.readCard8();
|
|
int rh = stream.readCard8();
|
|
client.ClientFillRectangle(x + rx, y + ry, rw, rh, foreground);
|
|
}
|
|
}
|
|
|
|
private void ReadFillRectangles(int rx, int ry, int n)
|
|
{
|
|
int pixelSize = (bitsPerPixel + 7) >> 3;
|
|
int length = n * (pixelSize + 2);
|
|
stream.readFully(_data, 0, length);
|
|
int index = 0;
|
|
for (int i = 0; i < n; ++i)
|
|
{
|
|
Color foreground = ReadColor();
|
|
int sxy = _data[index++] & 0xff;
|
|
int sx = sxy >> 4;
|
|
int sy = sxy & 0xf;
|
|
int swh = _data[index++] & 0xff;
|
|
int sw = (swh >> 4) + 1;
|
|
int sh = (swh & 0xf) + 1;
|
|
client.ClientFillRectangle(
|
|
rx + sx, ry + sy, sw, sh, foreground
|
|
);
|
|
}
|
|
}
|
|
|
|
private void ReadRectangles(int rx, int ry, int n, Color foreground)
|
|
{
|
|
for (int i = 0; i < n; ++i)
|
|
{
|
|
int sxy = stream.readCard8();
|
|
int sx = sxy >> 4;
|
|
int sy = sxy & 0xf;
|
|
int swh = stream.readCard8();
|
|
int sw = (swh >> 4) + 1;
|
|
int sh = (swh & 0xf) + 1;
|
|
client.ClientFillRectangle(
|
|
rx + sx, ry + sy, sw, sh, foreground
|
|
);
|
|
}
|
|
}
|
|
|
|
private void FillRectBytes(byte[] data, int stride, int x, int y, int width, int height, byte[] color)
|
|
{
|
|
// Fast path thin rectangles
|
|
|
|
int p = (y * stride) + (x * 4);
|
|
int skip;
|
|
|
|
if (width == 1 && height == 1)
|
|
{
|
|
data[p + 0] = color[0];
|
|
data[p + 1] = color[1];
|
|
data[p + 2] = color[2];
|
|
data[p + 3] = color[3];
|
|
}
|
|
else if (width == 1)
|
|
{
|
|
skip = stride - 4;
|
|
|
|
for (int i = 0; i < height; i++)
|
|
{
|
|
data[p + 0] = color[0];
|
|
data[p + 1] = color[1];
|
|
data[p + 2] = color[2];
|
|
data[p + 3] = color[3];
|
|
|
|
p += skip;
|
|
}
|
|
}
|
|
else if (height == 1)
|
|
{
|
|
for (int i = 0; i < width; i++)
|
|
{
|
|
data[p + 0] = color[0];
|
|
data[p + 1] = color[1];
|
|
data[p + 2] = color[2];
|
|
data[p + 3] = color[3];
|
|
|
|
p += 4;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
skip = stride - (width * 4);
|
|
|
|
for (int j = 0; j < height; j++)
|
|
{
|
|
for (int i = 0; i < width; i++)
|
|
{
|
|
data[p + 0] = color[0];
|
|
data[p + 1] = color[1];
|
|
data[p + 2] = color[2];
|
|
data[p + 3] = color[3];
|
|
|
|
p += 4;
|
|
}
|
|
p += skip;
|
|
}
|
|
}
|
|
}
|
|
|
|
private void ReadHextileEncoding(int x, int y, int width, int height)
|
|
{
|
|
/*
|
|
* Basically, we have two ways of doing this.
|
|
* 1. Draw the hextile to a byte buffer, convert to image
|
|
* and draw to client
|
|
* 2. Draw the individual rectangles of the hex encoding
|
|
* directly to the client
|
|
*
|
|
* I have found its faster to do 1) when size is > 64
|
|
*/
|
|
//GraphicsUtils.startTime();
|
|
if (width * height > 64)
|
|
{
|
|
byte[] background = { 0, 0, 0, 0xFF }; // Black
|
|
byte[] foreground = { 0xFF, 0xFF, 0xFF, 0xFF }; // White
|
|
|
|
byte[] buff = new byte[width * height * 4]; //assume 32 bpp
|
|
int stride = width * 4;
|
|
|
|
for (int sy = 0; sy < height; sy += 16)
|
|
{
|
|
int sheight = Math.Min(16, height - sy);
|
|
|
|
for (int sx = 0; sx < width; sx += 16)
|
|
{
|
|
int swidth = Math.Min(16, width - sx);
|
|
|
|
int mask = stream.readCard8();
|
|
|
|
if ((mask & RAW_SUBENCODING) != 0)
|
|
{
|
|
int length = swidth * sheight * 4;
|
|
stream.readFully(_data, 0, length);
|
|
|
|
int index = 0;
|
|
int skip = stride - (swidth * 4);
|
|
int p = (sy * stride) + (sx * 4);
|
|
|
|
for (int i = 0; i < sheight; i++)
|
|
{
|
|
for (int j = 0; j < swidth; j++)
|
|
{
|
|
byte[] color = ReadColorBytes(_data, index);
|
|
|
|
index += 4; //assumed 32bpp here
|
|
|
|
buff[p + 3] = color[3];
|
|
buff[p + 2] = color[2];
|
|
buff[p + 1] = color[1];
|
|
buff[p + 0] = color[0];
|
|
|
|
p += 4;
|
|
}
|
|
|
|
p += skip;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if ((mask & BACKGROUND_SPECIFIED_SUBENCODING) != 0)
|
|
{
|
|
background = ReadColorBytes();
|
|
}
|
|
|
|
FillRectBytes(buff, stride, sx, sy, swidth, sheight, background);
|
|
|
|
if ((mask & FOREGROUND_SPECIFIED_SUBENCODING) != 0)
|
|
{
|
|
foreground = ReadColorBytes();
|
|
}
|
|
|
|
if ((mask & ANY_SUBRECTS_SUBENCODING) != 0)
|
|
{
|
|
int n = stream.readCard8();
|
|
if ((mask & SUBRECTS_COLORED_SUBENCODING) != 0)
|
|
{
|
|
int length = n * 6; //assume 32bpp
|
|
stream.readFully(_data, 0, length);
|
|
int index = 0;
|
|
for (int i = 0; i < n; ++i)
|
|
{
|
|
byte[] color = new byte[4];
|
|
uint pixel = (uint)(_data[index + 0] & 0xFF |
|
|
_data[index + 1] << 8 |
|
|
_data[index + 2] << 16 |
|
|
_data[index + 3] << 24);
|
|
|
|
//ARGB Encoding
|
|
color[3] = 0xFF;
|
|
color[2] = (byte)((pixel >> redShift) & redMax);
|
|
color[1] = (byte)((pixel >> greenShift) & greenMax);
|
|
color[0] = (byte)((pixel >> blueShift) & blueMax);
|
|
|
|
index += 4;
|
|
int txy = _data[index++] & 0xff;
|
|
int tx = txy >> 4;
|
|
int ty = txy & 0xf;
|
|
int twh = _data[index++] & 0xff;
|
|
int tw = (twh >> 4) + 1;
|
|
int th = (twh & 0xf) + 1;
|
|
|
|
FillRectBytes(buff, stride, sx + tx, sy + ty, tw, th, color);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (int i = 0; i < n; ++i)
|
|
{
|
|
int txy = stream.readCard8();
|
|
int tx = txy >> 4;
|
|
int ty = txy & 0xf;
|
|
int twh = stream.readCard8();
|
|
int tw = (twh >> 4) + 1;
|
|
int th = (twh & 0xf) + 1;
|
|
|
|
FillRectBytes(buff, stride, sx + tx, sy + ty, tw, th, foreground);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Now convert to image and write to screen
|
|
GCHandle handle = GCHandle.Alloc(buff, GCHandleType.Pinned);
|
|
try
|
|
{
|
|
IntPtr pointer = Marshal.UnsafeAddrOfPinnedArrayElement(buff, 0);
|
|
using (Bitmap bitmap = new Bitmap(width, height, stride, PixelFormat.Format32bppArgb, pointer))
|
|
{
|
|
client.ClientDrawImage(bitmap, x, y, width, height);
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
handle.Free();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Color foreground = Color.White;
|
|
Color background = Color.Black;
|
|
|
|
int xCount = (width + 15) >> 4;
|
|
int yCount = (height + 15) >> 4;
|
|
for (int yi = 0; yi < yCount; ++yi)
|
|
{
|
|
int ry = y + (yi << 4);
|
|
int rh = (yi == (yCount - 1)) ? height & 0xf : 16;
|
|
if (rh == 0)
|
|
{
|
|
rh = 16;
|
|
}
|
|
for (int xi = 0; xi < xCount; ++xi)
|
|
{
|
|
int rx = x + (xi << 4);
|
|
int rw = (xi == (xCount - 1)) ? width & 0xf : 16;
|
|
if (rw == 0)
|
|
{
|
|
rw = 16;
|
|
}
|
|
int mask = stream.readCard8();
|
|
if ((mask & RAW_SUBENCODING) != 0)
|
|
{
|
|
ReadRawEncoding(rx, ry, rw, rh);
|
|
}
|
|
else
|
|
{
|
|
if ((mask & BACKGROUND_SPECIFIED_SUBENCODING) != 0)
|
|
{
|
|
background = ReadColor();
|
|
}
|
|
client.ClientFillRectangle(rx, ry, rw, rh, background);
|
|
if ((mask & FOREGROUND_SPECIFIED_SUBENCODING) != 0)
|
|
{
|
|
foreground = ReadColor();
|
|
}
|
|
if ((mask & ANY_SUBRECTS_SUBENCODING) != 0)
|
|
{
|
|
int n = stream.readCard8();
|
|
if ((mask & SUBRECTS_COLORED_SUBENCODING) != 0)
|
|
{
|
|
ReadFillRectangles(rx, ry, n);
|
|
}
|
|
else
|
|
{
|
|
ReadRectangles(rx, ry, n, foreground);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/*double time = GraphicsUtils.endTime("hextile");
|
|
int size = width * height;
|
|
StatsEntry entry = new StatsEntry();
|
|
entry.time = time;
|
|
entry.size = size;
|
|
|
|
this.client.stats.Add(entry);*/
|
|
}
|
|
|
|
private void ReadCursorPseudoEncoding(int x, int y, int width, int height)
|
|
{
|
|
ReadRawEncoding_(0, x, y, width, height, true);
|
|
}
|
|
|
|
private void ReadFrameBufferUpdate()
|
|
{
|
|
stream.readPadding(1);
|
|
int n = stream.readCard16();
|
|
Log.Debug("reading " + n + " rectangles");
|
|
bool fb_updated = false;
|
|
|
|
Win32.QueryPerformanceCounter(out var start);
|
|
for (int i = 0; i < n; ++i)
|
|
{
|
|
int x = stream.readCard16();
|
|
int y = stream.readCard16();
|
|
int width = stream.readCard16();
|
|
int height = stream.readCard16();
|
|
int encoding = stream.readCard32();
|
|
Log.Debug("read " + x + " " + y + " " + width + " " + height + " " + encoding);
|
|
switch (encoding)
|
|
{
|
|
case RAW_ENCODING:
|
|
ReadRawEncoding(x, y, width, height);
|
|
break;
|
|
case RRE_ENCODING:
|
|
ReadRREEncoding(x, y, width, height);
|
|
break;
|
|
case CORRE_ENCODING:
|
|
ReadCoRREEncoding(x, y, width, height);
|
|
break;
|
|
case COPY_RECTANGLE_ENCODING:
|
|
ReadCopyRectangleEncoding(x, y, width, height);
|
|
break;
|
|
case HEXTILE_ENCODING:
|
|
ReadHextileEncoding(x, y, width, height);
|
|
break;
|
|
|
|
case CURSOR_PSEUDO_ENCODING:
|
|
ReadCursorPseudoEncoding(x, y, width, height);
|
|
break;
|
|
|
|
case DESKTOP_SIZE_PSEUDO_ENCODING:
|
|
DesktopSize(width, height);
|
|
// Since the desktop size has changed, we want a full buffer update next time
|
|
_incremental = false;
|
|
break;
|
|
|
|
case QEMU_EXT_KEY_ENCODING:
|
|
qemu_ext_key_encoding = true;
|
|
break;
|
|
|
|
default:
|
|
throw new VNCException("unimplemented encoding: " + encoding);
|
|
}
|
|
|
|
Win32.QueryPerformanceCounter(out var end);
|
|
if (end - start > imageUpdateThreshold)
|
|
{
|
|
client.ClientFrameBufferUpdate();
|
|
start = end;
|
|
fb_updated = true;
|
|
}
|
|
else
|
|
{
|
|
fb_updated = false;
|
|
}
|
|
}
|
|
|
|
if (!fb_updated)
|
|
client.ClientFrameBufferUpdate();
|
|
}
|
|
|
|
|
|
private void DesktopSize(int width, int height)
|
|
{
|
|
_width = width;
|
|
_height = height;
|
|
int neededBytes = width * height * bytesPerPixel;
|
|
if (neededBytes > _data.Length)
|
|
{
|
|
_data = new byte[neededBytes];
|
|
}
|
|
if (bitsPerPixel == 8 && (data_8bpp == null || neededBytes * 4 > data_8bpp.Length))
|
|
{
|
|
data_8bpp = new byte[neededBytes * 4];
|
|
}
|
|
client.ClientDesktopSize(width, height);
|
|
}
|
|
|
|
private void ReadServerCutText()
|
|
{
|
|
stream.readPadding(3);
|
|
String text = stream.readString();
|
|
client.ClientCutText(text);
|
|
}
|
|
|
|
private void ReadServerMessage()
|
|
{
|
|
Log.Debug("readServerMessage");
|
|
|
|
int type = stream.readCard8();
|
|
|
|
switch (type)
|
|
{
|
|
case FRAME_BUFFER_UPDATE:
|
|
Log.Debug("Update");
|
|
ReadFrameBufferUpdate();
|
|
break;
|
|
case BELL:
|
|
Log.Debug("Bell");
|
|
client.ClientBell();
|
|
break;
|
|
case SERVER_CUT_TEXT:
|
|
Log.Debug("Cut text");
|
|
ReadServerCutText();
|
|
break;
|
|
default:
|
|
throw new VNCException("unknown server message: " + type);
|
|
}
|
|
}
|
|
|
|
private void Run(object o)
|
|
{
|
|
char[] password = (char[])o;
|
|
|
|
try
|
|
{
|
|
CheckProtocolVersion();
|
|
SendProtocolVersion();
|
|
AuthenticationExchange(password);
|
|
InitializeClient();
|
|
InitializateServer();
|
|
|
|
if (ConnectionSuccess != null)
|
|
ConnectionSuccess(this, null);
|
|
|
|
// Request a full framebuffer update the first time
|
|
_incremental = false;
|
|
|
|
while (running)
|
|
{
|
|
lock (writeLock)
|
|
{
|
|
WriteFramebufferUpdateRequest(0, 0, _width, _height, _incremental);
|
|
stream.Flush();
|
|
}
|
|
|
|
_incremental = true;
|
|
|
|
ReadServerMessage();
|
|
|
|
lock (pauseMonitor)
|
|
{
|
|
lock(updateMonitor)
|
|
Monitor.PulseAll(updateMonitor);
|
|
|
|
if (paused)
|
|
Monitor.Wait(pauseMonitor);
|
|
}
|
|
}
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
if (running && ErrorOccurred != null)
|
|
ErrorOccurred(this, e);
|
|
}
|
|
}
|
|
|
|
public void Close()
|
|
{
|
|
if (!running)
|
|
return;
|
|
|
|
running = false;
|
|
try
|
|
{
|
|
stream.Close();
|
|
lock (pauseMonitor)
|
|
Monitor.PulseAll(pauseMonitor);
|
|
thread.Interrupt();
|
|
}
|
|
catch
|
|
{
|
|
// ignored
|
|
}
|
|
}
|
|
|
|
public void Pause()
|
|
{
|
|
paused = true;
|
|
}
|
|
|
|
public void UnPause(bool fullupdate = false)
|
|
{
|
|
_incremental = !fullupdate;
|
|
paused = false;
|
|
lock (pauseMonitor)
|
|
Monitor.PulseAll(pauseMonitor);
|
|
}
|
|
}
|
|
}
|