The main function is responsible for initialization of global variables and starting the user interface. The source code of the main function is placed in ./main.c in the Osiris source code tree and given in Fig 5.3.
There are several global variables. They are declared and well commented in ./main.h file in the Osiris source code tree.
The initialization of user interface creates all top-level windows such as controller_window and editor_window which are the main windows of the Controller and the Editor modules respectively.
Furthermore the main function starts a GTK main loop which controls the behavior of the user interface (see Section 5.4 and Appendix B).
![\begin{figure}\begin{center}
\begin{verbatim}int
main (int argc, char *argv[])...
...als();
g_free(global_font);
return 0;
}\end{verbatim} \end{center}\end{figure}](img22.png)