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Top Forums UNIX for Advanced & Expert Users How a windowing system is implemented in C ? Post 302888398 by coolatt on Friday 14th of February 2014 05:31:53 AM
Old 02-14-2014
Debian How a windowing system is implemented in C ?

Hi All,
I was wondering how using C the programmers have implemented a GUI (x window & ms windows). Am curious to learn about the overall architecture.

I learned a bit about graphics primitives, memory mapped io, etc
I want to learn more whether the above is the foundation upon which modern GUI are built on both Windows & Linux.
Also, i want to know how the Kernel comes into play here.
 

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Ekiga(1)							   Version 2.00 							  Ekiga(1)

NAME
Ekiga - SIP and H.323 Voice over IP and Videoconferencing for UN*X SYNOPSIS
ekiga [-d level] [-c URL] DESCRIPTION
Ekiga is a SIP and H.323 VoIP, IP Telephony and Video Conferencing application which complies to the SIP and H.323 protocols. It can con- nect to a variety of other SIP and H323 applications including specific hardware. Ekiga can work with or without a webcam, and is able to create pure audio communications or traditional audio+video communications. Ekiga was formerly known as GnomeMeeting. Ekiga has been designed for the GNOME desktop and therefore uses gconfd-2(1) for storing its userdata. It offers to configure almost every option from within the GUI. Command-line options include -d to turn on debugging during calls. -c to call another URL. OPTIONS
-d level turn on debugging (on the console), level should be between 1 and 4. -c URL Calls the given URL. Ekiga can be running or not when invoking that option. SIP, H.323 and CALLTO URLs are supported. FILES
/etc/gconf/gconf.xml.defaults/apps/ekiga/ The system wide configuration file. See gconf-config(1) for further details on gconf. (The actual place can differ depending on your system's configuration) ~/.gconf/apps/ekiga Per user configuration file. See gconf-config(1) for further details. ENVIRONMENT
On startup Ekiga reads the system-wide gconf schemas (like every other GNOME2 app should do) from /etc/gconf/gconf.xml.defaults/apps. Every modification of the gconf keys using the GUI, gconftool or gconf-editor is reflected in real-time by Ekiga. DOCUMENTATION
More documentation is available in the manual available through Ekiga's Help menu. There is also a FAQ at: http://www.ekiga.org GETTING HELP
Feel free to join #ekiga on irc.gnome.org (GIMPnet) or the ML at: http://mail.gnome.org/mailman/listinfo/ekiga-list after having read the FAQ at http://www.ekiga.org/ . AUTHOR
Damien Sandras <dsandras at seconix dot com> OTHER INFO
The webpage for Ekiga is at http://www.ekiga.org. You can find info about Ekiga there and download the latest version. Either as packages for all major distributions or as sourcecode. Patched version of the libs are available, if necessary. COPYRIGHT
Copyright (C) 2000-2008 Damien Sandras This is free software licensed under the GPLv2; see the LICENSE file in the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. SEE ALSO
gconf-config(1), gconfd-1(1), gconfd-2(1), gconftool-1(1), gconftool-2(1), gconfigger(1) Linux 10 January 2006 Ekiga(1)
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