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- /* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
- * Copyright 2009-2011 Pierre Ossman for Cendio AB
- * Copyright (C) 2011 Brian P. Hinz
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
- * USA.
- */
-
- package com.tigervnc.rfb;
-
- import com.tigervnc.rdr.*;
- import java.nio.ByteBuffer;
- import java.nio.charset.Charset;
- import java.util.Iterator;
-
- public class CMsgWriter {
-
- protected CMsgWriter(ConnParams cp_, OutStream os_)
- {
- cp = cp_;
- os = os_;
- }
-
- synchronized public void writeClientInit(boolean shared) {
- os.writeU8(shared?1:0);
- endMsg();
- }
-
- synchronized public void writeSetPixelFormat(PixelFormat pf)
- {
- startMsg(MsgTypes.msgTypeSetPixelFormat);
- os.pad(3);
- pf.write(os);
- endMsg();
- }
-
- synchronized public void writeSetEncodings(int nEncodings, int[] encodings)
- {
- startMsg(MsgTypes.msgTypeSetEncodings);
- os.skip(1);
- os.writeU16(nEncodings);
- for (int i = 0; i < nEncodings; i++)
- os.writeU32(encodings[i]);
- endMsg();
- }
-
- // Ask for encodings based on which decoders are supported. Assumes higher
- // encoding numbers are more desirable.
-
- synchronized public void writeSetEncodings(int preferredEncoding, boolean useCopyRect)
- {
- int nEncodings = 0;
- int[] encodings = new int[Encodings.encodingMax+3];
-
- if (cp.supportsLocalCursor) {
- if (cp.supportsLocalCursorWithAlpha)
- encodings[nEncodings++] = Encodings.pseudoEncodingCursorWithAlpha;
- encodings[nEncodings++] = Encodings.pseudoEncodingCursor;
- encodings[nEncodings++] = Encodings.pseudoEncodingXCursor;
- }
- if (cp.supportsDesktopResize)
- encodings[nEncodings++] = Encodings.pseudoEncodingDesktopSize;
- if (cp.supportsExtendedDesktopSize)
- encodings[nEncodings++] = Encodings.pseudoEncodingExtendedDesktopSize;
- if (cp.supportsDesktopRename)
- encodings[nEncodings++] = Encodings.pseudoEncodingDesktopName;
- if (cp.supportsClientRedirect)
- encodings[nEncodings++] = Encodings.pseudoEncodingClientRedirect;
-
- encodings[nEncodings++] = Encodings.pseudoEncodingLastRect;
- encodings[nEncodings++] = Encodings.pseudoEncodingContinuousUpdates;
- encodings[nEncodings++] = Encodings.pseudoEncodingFence;
-
- if (Decoder.supported(preferredEncoding)) {
- encodings[nEncodings++] = preferredEncoding;
- }
-
- if (useCopyRect) {
- encodings[nEncodings++] = Encodings.encodingCopyRect;
- }
-
- /*
- * Prefer encodings in this order:
- *
- * Tight, ZRLE, Hextile, *
- */
-
- if ((preferredEncoding != Encodings.encodingTight) &&
- Decoder.supported(Encodings.encodingTight))
- encodings[nEncodings++] = Encodings.encodingTight;
-
- if ((preferredEncoding != Encodings.encodingZRLE) &&
- Decoder.supported(Encodings.encodingZRLE))
- encodings[nEncodings++] = Encodings.encodingZRLE;
-
- if ((preferredEncoding != Encodings.encodingHextile) &&
- Decoder.supported(Encodings.encodingHextile))
- encodings[nEncodings++] = Encodings.encodingHextile;
-
- // Remaining encodings
- for (int i = Encodings.encodingMax; i >= 0; i--) {
- switch (i) {
- case Encodings.encodingCopyRect:
- case Encodings.encodingTight:
- case Encodings.encodingZRLE:
- case Encodings.encodingHextile:
- /* These have already been sent earlier */
- break;
- default:
- if ((i != preferredEncoding) && Decoder.supported(i))
- encodings[nEncodings++] = i;
- }
- }
-
- if (cp.compressLevel >= 0 && cp.compressLevel <= 9)
- encodings[nEncodings++] =
- Encodings.pseudoEncodingCompressLevel0 + cp.compressLevel;
- if (cp.qualityLevel >= 0 && cp.qualityLevel <= 9)
- encodings[nEncodings++] =
- Encodings.pseudoEncodingQualityLevel0 + cp.qualityLevel;
-
- writeSetEncodings(nEncodings, encodings);
- }
-
- synchronized public void writeSetDesktopSize(int width, int height,
- ScreenSet layout)
- {
- if (!cp.supportsSetDesktopSize)
- throw new Exception("Server does not support SetDesktopSize");
-
- startMsg(MsgTypes.msgTypeSetDesktopSize);
- os.pad(1);
-
- os.writeU16(width);
- os.writeU16(height);
-
- os.writeU8(layout.num_screens());
- os.pad(1);
-
- for (Iterator<Screen> iter = layout.screens.iterator(); iter.hasNext(); ) {
- Screen refScreen = (Screen)iter.next();
- os.writeU32(refScreen.id);
- os.writeU16(refScreen.dimensions.tl.x);
- os.writeU16(refScreen.dimensions.tl.y);
- os.writeU16(refScreen.dimensions.width());
- os.writeU16(refScreen.dimensions.height());
- os.writeU32(refScreen.flags);
- }
-
- endMsg();
- }
-
- synchronized public void writeFramebufferUpdateRequest(Rect r, boolean incremental)
- {
- startMsg(MsgTypes.msgTypeFramebufferUpdateRequest);
- os.writeU8(incremental?1:0);
- os.writeU16(r.tl.x);
- os.writeU16(r.tl.y);
- os.writeU16(r.width());
- os.writeU16(r.height());
- endMsg();
- }
-
- synchronized public void writeEnableContinuousUpdates(boolean enable,
- int x, int y, int w, int h)
- {
- if (!cp.supportsContinuousUpdates)
- throw new Exception("Server does not support continuous updates");
-
- startMsg(MsgTypes.msgTypeEnableContinuousUpdates);
-
- os.writeU8((enable?1:0));
-
- os.writeU16(x);
- os.writeU16(y);
- os.writeU16(w);
- os.writeU16(h);
-
- endMsg();
- }
-
- synchronized public void writeFence(int flags, int len, byte[] data)
- {
- if (!cp.supportsFence)
- throw new Exception("Server does not support fences");
- if (len > 64)
- throw new Exception("Too large fence payload");
- if ((flags & ~fenceTypes.fenceFlagsSupported) != 0)
- throw new Exception("Unknown fence flags");
-
- startMsg(MsgTypes.msgTypeClientFence);
- os.pad(3);
-
- os.writeU32(flags);
-
- os.writeU8(len);
- os.writeBytes(data, 0, len);
-
- endMsg();
- }
-
- synchronized public void keyEvent(int keysym, boolean down)
- {
- startMsg(MsgTypes.msgTypeKeyEvent);
- os.writeU8(down?1:0);
- os.pad(2);
- os.writeU32(keysym);
- endMsg();
- }
-
- synchronized public void pointerEvent(Point pos, int buttonMask)
- {
- Point p = new Point(pos.x,pos.y);
- if (p.x < 0) p.x = 0;
- if (p.y < 0) p.y = 0;
- if (p.x >= cp.width) p.x = cp.width - 1;
- if (p.y >= cp.height) p.y = cp.height - 1;
-
- startMsg(MsgTypes.msgTypePointerEvent);
- os.writeU8(buttonMask);
- os.writeU16(p.x);
- os.writeU16(p.y);
- endMsg();
- }
-
- synchronized public void writeClientCutText(String str, int len)
- {
- startMsg(MsgTypes.msgTypeClientCutText);
- os.pad(3);
- os.writeU32(len);
- Charset latin1 = Charset.forName("ISO-8859-1");
- ByteBuffer bytes = latin1.encode(str);
- os.writeBytes(bytes.array(), 0, len);
- endMsg();
- }
-
- synchronized public void startMsg(int type) {
- os.writeU8(type);
- }
-
- synchronized public void endMsg() {
- os.flush();
- }
-
- ConnParams cp;
- OutStream os;
- }
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