Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>pull/1/head
Johannes Schindelin
14 years ago
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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
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<html>
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<head>
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<title>LibVNCServer/LibVNCClient</title>
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</head>
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<body>
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<h1>LibVNCServer/LibVNCClient</h1>
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<br>
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If you have problems updating with CVS, here is a <a href=LibVNCServer-0.8pre.tar.gz>preliminary version</a>. If you are looking for more information
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on Karl's wonderful x11vnc, either download it
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<a href=http://sourceforge.net/project/showfiles.php?group_id=32584>here</a>, or
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look at <a href=http://www.karlrunge.com/x11vnc/>x11vnc's homepage</a>.
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<p>
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<h2> News </h2>
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<strong>2005/09/29</strong> LibVNCServer now sports a brand new method to extend the protocol, thanks to Rohit Kumar! He also extended the library to support RFB 3.7. Furthermore, he contributed TightVNC file transfer protocol support to LibVNCServer!
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<p>
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<strong>2005/05/25</strong> LibVNCClient now features ZRLE decoding!
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<p>
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<strong>2005/05/15</strong> Another round of valgrinding completed. This time it is augmented by changes instigated by using Linus' sparse. In the course, the complete sources were converted to ANSI C.
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<p>
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<strong>2005/05/07</strong> The member socketInitDone was renamed to socketState, and no longer contains a bool value. This allows us to quit a server cleanly from the event loop via rfbShutdownServer(), so that the structures can be cleaned up properly. This is demonstrated in examples/example.c.
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<p>
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<strong>2005/01/21</strong> The function rfbMakeMaskFromAlphaSource() applies a Floyd-Steinberg dither to approximate a binary mask from a cursor with alpha channel. A demonstration can be found in test/cursortest.c.
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<p>
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<strong>2005/01/16</strong> Renamed this page to reflect that LibVNCClient is actually very usable.
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<p>
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<strong>2005/01/16</strong> Karl Runge has done awesome work to support cursors with alpha blending! You can try it with x11vnc as in CVS, or wait a few more days for x11vnc to be released officially!
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<p>
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<strong>2005/01/15</strong> Happy new year! It begins with a new macro recorder based on LibVNCServer/LibVNCClient using perl as script language. The macro recorder is itself written in perl, and writes out perl scripts, acting as a VNC proxy, so that you can connect a vncviewer to it, and it records all your input, possibly looking for a certain button, image, word, etc. before continuing. I called it VisualNaCro, and it's in CVS.
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<p>
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<strong>2004/12/20</strong> Just before christmas, a new release! Version 0.7 brings you the first non-beta of LibVNCServer...
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<p>
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<strong>2004/12/02</strong> Finally MinGW32 support. I only had problems with a vncviewer which wouldn't connect to localhost: I use SDLvncviewer...
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<p>
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<strong>2004/12/01</strong> LibVNCClient is getting better and better... Expect a very powerful client soon!
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<p>
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<strong>2004/10/16</strong> LibVNCServer has automated test, thanks to LibVNCClient (included). It doesn't do ZRLE yet, and exposed some bugs, the only remaining of these is CoRRE (not sure yet if it's a bug in the client or the server).
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<p>
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<strong>2004/09/14</strong> Added
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<a href=http://libvncserver.sourceforge.net/success.html>
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Success stories</a>.
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<p>
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<strong>2004/09/07</strong> The API was cleaned up. The structures and functions now have a prefix (mostly "rfb", sometimes "zrle" or "sra") in order not to clutter the namespace, while the structure's members don't need such a prefix.
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<p>
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<strong>2004/08/17</strong> I finally came around to fix mouse behaviour in QEMU's VNC frontend for Windows 98. Please find the patch <a href=qemu/>here</a>. If mouse behaves strangely, try to wiggle the pointer to a free spot on the desktop, hit Ctrl+Shift and release them. After that, the mouse should behave nicely.
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<p>
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<strong>2004/06/07</strong> After silently being added almost a year ago, libvncclient's API was modified for real use, and three examples were added: ppmtest (a very simple demo), SDLvncviewer, and vnc2mpg (which lets you record your VNC session to a movie). Automated regression tests of the libraries are planned.
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<p>
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<strong>2004/06/02</strong> <a href=http://www.karlrunge.com/x11vnc/>x11vnc</a>-0.6.1 was released! This reflects the long way the original, small example has gone, improved in many possible ways and having a broad user base.
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<p>
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<strong>2004/05/29</strong> Some <a href=qemu/>patches</a> were created for <a href=http://fabrice.bellard.free.fr/qemu/>QEMU</a>, a FAST! emulator by Fabrice Bellard, to control those sessions with a vncviewer.
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<p>
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<strong>2004/02/29</strong> LibVNCServer is listed as a project using <a href=http://valgrind.kde.org/>Valgrind</a>!
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<p>
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<strong>2003/11/07</strong> Version 0.6 is out! x11vnc performance boosts! You no longer need a c++ compiler in order to have ZRLE coding! LinuxVNC was added (This is to the text console what x11vnc is to X11)!
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<p>
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<strong>2003/02/21</strong> rdp2vnc is in rdesktop's CVS.
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<p>
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<strong>2003/02/19</strong> A preliminary patch for rdesktop (CVS) to make
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rdp2vnc, a translator from Windows Terminal Server's protocol to VNC's protocol,
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is <a href=rdesktop-cvs+vnc.diff.gz>available</a>. It needs a new version of
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libvncserver; try CVS until I release 0.6.
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<p>
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<strong>2003/02/09</strong> Version 0.5 is out! Features include autoconf based configure, rpm package (YMMV), cleanup of directory structure, NEW x11vnc! ZRLE encoding! HTTP tunnelling through LibVNCServer's HTTP support! Many bug fixes!
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<p>
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<strong>2002/07/28</strong> Version 0.4 is out! Biggest feature: NewFB encoding. Quite a few bugfixes also (Thanks to all!).
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<p>
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<strong>2001/12/14</strong> A new version of
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<a href=http://prdownloads.sourceforge.net/libvncserver/rdesktop-1.1.0+vnc-0.2.tar.gz>rdesktop+vnc</a> is available!
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(Includes support for other platforms keyboard mapping with plain rdesktop!)
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<p>
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<strong>2001/10/23</strong> Added a link to my homepage at the end.
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<p>
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<strong>2001/10/18</strong> I released the rdp2vnc extensions as well as
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patches for general keyboard handling, working inside Xvnc and
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process_text2 (the famous "font:" error) to rdesktop. Please find it on
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the <a href=http://sourceforge.net/project/showfiles.php?group_id=32584>
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download page</a>.
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<p>
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<strong>2001/10/13</strong> A snapshot of
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<a href=http://sourceforge.net/project/showfiles.php?group_id=32584>
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LibVNCServer</a> and
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<a href=http://sourceforge.net/project/showfiles.php?group_id=32584>
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RDP2VNC</a>
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is now available. You can also download the
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<a href=http://sourceforge.net/project/showfiles.php?group_id=32584>
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diff</a> against rdesktop-1.1.0.
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rdp2vnc also contains the patches for keyboards other than PC keyboards,
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and you can specify "-k fr" again.
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<p><br>
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<h2> Introduction </h2>
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If you don't know VNC, have a look at
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<a href=http://www.uk.research.att.com/vnc/>the original VNC</a> or at
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<a href=http://www.tridiavnc.com/>Tridia VNC</a>, who also have commercial
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support for it.
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<p>
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Now that you know what it is, maybe you want to make your own server.
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If this is not the case, you can ignore the rest of this page an go on
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surfing the internet.
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<p>
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Now that you want to make a VNC server, that is, a server which speaks
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the RFB protocol, you can download this library from
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<a href=http://sf.net/projects/libvncserver/>sourceforge</a>.
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<p>
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The simplest server looks like this:<br><br>
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<pre>
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#include <rfb/rfb.h>
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int main(int argc,char** argv)
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{
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rfbScreenInfoPtr server=rfbGetScreen(&argc,argv,400,300,8,3,4);
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server->frameBuffer=malloc(400*300*4);
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rfbInitServer(server);
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rfbRunEventLoop(server,-1,FALSE);
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return(0);
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}
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</pre>
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This sample creates a 400x300 frame buffer in true colour. There are
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4 bytes per pixel, because 3 (which are only used instead of all 4) is
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such an odd number. Then the server is initialized and a blocking event
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loop is started.
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<p>
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Of course, this program only shows rubbish (whatever is in the frame
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buffer you malloc'd), but it proves that writing a server can be
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very easy.
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<p>
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For details (especially if you want to write a real server) look into the
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provided examples, pnmshow.c and example.c, and into the README. You find
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there documentation for much more complicated servers.
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<p>
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Serious comments, suggestions, pizzas, etc. go to
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<a href=mailto:Johannes.Schindelin@RuBBISHgmx.de>me</a>
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(delete the RuBBISH).
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<p>
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Here are some links:
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<p>
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LibVNCServer is an adapted
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<a href=http://www.redstonesoftware.com/vnc.html>OSXvnc-server</a> by
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<a href=mailto:mcguirk@incompleteness.net>Dan McGuirk</a>,
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which is in turn an adapted original
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<a href=http://www.uk.research.att.com/vnc/>Xvnc</a>.
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<p>
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I use it to to drive a
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<strong>Windows Terminal Server (RDP) to RFB converter</strong> with it.
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Much work has been done to make
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<a href=http://www.rdesktop.org/>rdesktop</a>
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a good X client to Windows Terminal Services (both NT and 2000, see
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<a href=http://bibl4.oru.se/projects/rdesktop/>rdesktop patches</a>).
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Previous work was done by <a href=mailto:tme23@cam.ac.uk>Tim Edmonds</a>
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who has set up such a converter named
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<a href=http://www-lce.eng.cam.ac.uk/~tme23/vdesktop/>vdesktop</a>
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including a single client server and a multi client server, rdp2vnc.
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Unfortunately he used the example code from rfbcounter, which can encode only
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RRE, which is not a good compression.
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<p>
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<a href=http://libvncserver.sourceforge.net/success.html>Other people</a>
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have used this library as well.
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<p>
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If you want to know about other of my projects, look at
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<a href=http://wrzx69.rz.uni-wuerzburg.de/~gene099/index.html>my homepage</a>.
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<hr>
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Project hosted on the fantastic
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<A href="http://sourceforge.net">
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<IMG src="http://sourceforge.net/sflogo.php?group_id=32584"
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width="88" height="31" border="0" alt="SourceForge Logo"></A><br>
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<!-- Created: Thu Sep 27 12:27:41 MESZ 2001 -->
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<!-- hhmts start -->
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Last modified: Mon Jan 17 18:23:00 MESZ 2005
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<!-- hhmts end -->
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</body>
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</html>
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@ -1,45 +0,0 @@
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<html>
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<head>
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<title>Success stories</title>
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</head>
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<body>
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<ul>
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<li>
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<a href=http://www.karlrunge.com>Karl Runge</a> took my first version of
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x11vnc, which was just a proof-of-concept that the library actually is
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usable, and turned it into a <a href=http://www.karlrunge.com/x11vnc/>
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fully fledged application</a>.
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<li>
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Tim Jansen created <a href=http://www.tjansen.de/krfb/>KRFB</a>, which is
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x11vnc integrated into KDE.
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<li>
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Jeff Mock of <a href=http://alfa.naic.edu>the world's largest radio telescope
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in Arecibo</a> sent me a nice
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<a href=http://libvncserver.sourceforge.net/alfa-vnc.gif>screenshot</a>,
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describing his use of LibVNCServer:
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<p>
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<i>I've been using it for about 4 months
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on a project to build a new spectrometer for the radio telescope at
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Arecibo. Arecibo is the largest radio telescope in the world (305m!) in
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Puerto Rico. It has 10-times the collecting area of the second largest
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telescope in Effelsburg (maybe near you?).
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<p>
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The project is an embedded linux box that boots from a compact flash
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card. The root filesystem is only about 5MB. X wasn't reasonable
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for such a small embedded system, but libvncserver was perfect. On
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the console we run graphical diagnostics that write directly to the
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frame buffer. It was a simple matter to hook this direct-framebuffer
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application to libvncserver. This way we can easily view the
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diagnostics for the spectrometer from the control room (or anyplace
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else for that matter).</i>
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<li>
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michu let me know that <a href=http://ssl.bulix.org/projects/lcd4linux/>
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LCD4Linux</a> has a VNC backend using LibVNCServer.
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</body>
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</html>
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