The website is now maintained independently

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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Johannes Schindelin 12 years ago
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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
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<title>LibVNCServer/LibVNCClient</title>
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<h1>LibVNCServer/LibVNCClient</h1>
<br>
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
on Karl's wonderful x11vnc, either download it
<a href=http://sourceforge.net/project/showfiles.php?group_id=32584>here</a>, or
look at <a href=http://www.karlrunge.com/x11vnc/>x11vnc's homepage</a>.
<p>
<h2> News </h2>
<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!
<p>
<strong>2005/05/25</strong> LibVNCClient now features ZRLE decoding!
<p>
<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.
<p>
<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.
<p>
<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.
<p>
<strong>2005/01/16</strong> Renamed this page to reflect that LibVNCClient is actually very usable.
<p>
<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!
<p>
<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.
<p>
<strong>2004/12/20</strong> Just before christmas, a new release! Version 0.7 brings you the first non-beta of LibVNCServer...
<p>
<strong>2004/12/02</strong> Finally MinGW32 support. I only had problems with a vncviewer which wouldn't connect to localhost: I use SDLvncviewer...
<p>
<strong>2004/12/01</strong> LibVNCClient is getting better and better... Expect a very powerful client soon!
<p>
<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).
<p>
<strong>2004/09/14</strong> Added
<a href=http://libvncserver.sourceforge.net/success.html>
Success stories</a>.
<p>
<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.
<p>
<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.
<p>
<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.
<p>
<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.
<p>
<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.
<p>
<strong>2004/02/29</strong> LibVNCServer is listed as a project using <a href=http://valgrind.kde.org/>Valgrind</a>!
<p>
<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)!
<p>
<strong>2003/02/21</strong> rdp2vnc is in rdesktop's CVS.
<p>
<strong>2003/02/19</strong> A preliminary patch for rdesktop (CVS) to make
rdp2vnc, a translator from Windows Terminal Server's protocol to VNC's protocol,
is <a href=rdesktop-cvs+vnc.diff.gz>available</a>. It needs a new version of
libvncserver; try CVS until I release 0.6.
<p>
<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!
<p>
<strong>2002/07/28</strong> Version 0.4 is out! Biggest feature: NewFB encoding. Quite a few bugfixes also (Thanks to all!).
<p>
<strong>2001/12/14</strong> A new version of
<a href=http://prdownloads.sourceforge.net/libvncserver/rdesktop-1.1.0+vnc-0.2.tar.gz>rdesktop+vnc</a> is available!
(Includes support for other platforms keyboard mapping with plain rdesktop!)
<p>
<strong>2001/10/23</strong> Added a link to my homepage at the end.
<p>
<strong>2001/10/18</strong> I released the rdp2vnc extensions as well as
patches for general keyboard handling, working inside Xvnc and
process_text2 (the famous "font:" error) to rdesktop. Please find it on
the <a href=http://sourceforge.net/project/showfiles.php?group_id=32584>
download page</a>.
<p>
<strong>2001/10/13</strong> A snapshot of
<a href=http://sourceforge.net/project/showfiles.php?group_id=32584>
LibVNCServer</a> and
<a href=http://sourceforge.net/project/showfiles.php?group_id=32584>
RDP2VNC</a>
is now available. You can also download the
<a href=http://sourceforge.net/project/showfiles.php?group_id=32584>
diff</a> against rdesktop-1.1.0.
rdp2vnc also contains the patches for keyboards other than PC keyboards,
and you can specify "-k fr" again.
<p><br>
<h2> Introduction </h2>
If you don't know VNC, have a look at
<a href=http://www.uk.research.att.com/vnc/>the original VNC</a> or at
<a href=http://www.tridiavnc.com/>Tridia VNC</a>, who also have commercial
support for it.
<p>
Now that you know what it is, maybe you want to make your own server.
If this is not the case, you can ignore the rest of this page an go on
surfing the internet.
<p>
Now that you want to make a VNC server, that is, a server which speaks
the RFB protocol, you can download this library from
<a href=http://sf.net/projects/libvncserver/>sourceforge</a>.
<p>
The simplest server looks like this:<br><br>
<pre>
#include &lt;rfb/rfb.h&gt;
int main(int argc,char** argv)
{
rfbScreenInfoPtr server=rfbGetScreen(&argc,argv,400,300,8,3,4);
server->frameBuffer=malloc(400*300*4);
rfbInitServer(server);
rfbRunEventLoop(server,-1,FALSE);
return(0);
}
</pre>
This sample creates a 400x300 frame buffer in true colour. There are
4 bytes per pixel, because 3 (which are only used instead of all 4) is
such an odd number. Then the server is initialized and a blocking event
loop is started.
<p>
Of course, this program only shows rubbish (whatever is in the frame
buffer you malloc'd), but it proves that writing a server can be
very easy.
<p>
For details (especially if you want to write a real server) look into the
provided examples, pnmshow.c and example.c, and into the README. You find
there documentation for much more complicated servers.
<p>
Serious comments, suggestions, pizzas, etc. go to
<a href=mailto:Johannes.Schindelin@RuBBISHgmx.de>me</a>
(delete the RuBBISH).
<p>
Here are some links:
<p>
LibVNCServer is an adapted
<a href=http://www.redstonesoftware.com/vnc.html>OSXvnc-server</a> by
<a href=mailto:mcguirk@incompleteness.net>Dan McGuirk</a>,
which is in turn an adapted original
<a href=http://www.uk.research.att.com/vnc/>Xvnc</a>.
<p>
I use it to to drive a
<strong>Windows Terminal Server (RDP) to RFB converter</strong> with it.
Much work has been done to make
<a href=http://www.rdesktop.org/>rdesktop</a>
a good X client to Windows Terminal Services (both NT and 2000, see
<a href=http://bibl4.oru.se/projects/rdesktop/>rdesktop patches</a>).
Previous work was done by <a href=mailto:tme23@cam.ac.uk>Tim Edmonds</a>
who has set up such a converter named
<a href=http://www-lce.eng.cam.ac.uk/~tme23/vdesktop/>vdesktop</a>
including a single client server and a multi client server, rdp2vnc.
Unfortunately he used the example code from rfbcounter, which can encode only
RRE, which is not a good compression.
<p>
<a href=http://libvncserver.sourceforge.net/success.html>Other people</a>
have used this library as well.
<p>
If you want to know about other of my projects, look at
<a href=http://wrzx69.rz.uni-wuerzburg.de/~gene099/index.html>my homepage</a>.
<hr>
Project hosted on the fantastic
<A href="http://sourceforge.net">
<IMG src="http://sourceforge.net/sflogo.php?group_id=32584"
width="88" height="31" border="0" alt="SourceForge Logo"></A><br>
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Last modified: Mon Jan 17 18:23:00 MESZ 2005
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<title>Success stories</title>
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<ul>
<li>
<a href=http://www.karlrunge.com>Karl Runge</a> took my first version of
x11vnc, which was just a proof-of-concept that the library actually is
usable, and turned it into a <a href=http://www.karlrunge.com/x11vnc/>
fully fledged application</a>.
<li>
Tim Jansen created <a href=http://www.tjansen.de/krfb/>KRFB</a>, which is
x11vnc integrated into KDE.
<li>
Jeff Mock of <a href=http://alfa.naic.edu>the world's largest radio telescope
in Arecibo</a> sent me a nice
<a href=http://libvncserver.sourceforge.net/alfa-vnc.gif>screenshot</a>,
describing his use of LibVNCServer:
<p>
<i>I've been using it for about 4 months
on a project to build a new spectrometer for the radio telescope at
Arecibo. Arecibo is the largest radio telescope in the world (305m!) in
Puerto Rico. It has 10-times the collecting area of the second largest
telescope in Effelsburg (maybe near you?).
<p>
The project is an embedded linux box that boots from a compact flash
card. The root filesystem is only about 5MB. X wasn't reasonable
for such a small embedded system, but libvncserver was perfect. On
the console we run graphical diagnostics that write directly to the
frame buffer. It was a simple matter to hook this direct-framebuffer
application to libvncserver. This way we can easily view the
diagnostics for the spectrometer from the control room (or anyplace
else for that matter).</i>
<li>
michu let me know that <a href=http://ssl.bulix.org/projects/lcd4linux/>
LCD4Linux</a> has a VNC backend using LibVNCServer.
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