Difference between revisions of "HOWTO-Backends"

HOWTO-Backends (view source)

8 bytes added , 21:46, 3 April 2006

Mention deinit of backend code

1,510

edits

@@ Line 20: / Line 20: @@
 # Subclass OSystem. You could copy the content of <tt>backends/null/null.cpp</tt> to <tt>backends/foobar/foobar.cpp</tt> to get a skeleton. As you progress, it might be helpful to look at other backends to learn how they do things.
 # Make sure to provide the <tt>main</tt> function in your backend (the actual main function of ScummVM is <tt>scummvm_main</tt>, which your backend must invoke at some point).
-# Instantiate OSystem class and assign it to <tt>g_system</tt>, do that before calling <tt>scumm_main</tt> i.e.:
+# Instantiate OSystem class and assign it to <tt>g_system</tt>, do that before calling <tt>scumm_main</tt>
-  g_system = new OSystem_SDL();
+# Deinit properly after calling <tt>scumm_main</tt>, particularly call <tt>g_system->quit()</tt>
-  assert(g_system);
-  scummvm_main(argc, argv);
 # If appropriate, edit <tt>configure</tt> to add your backend (this is only necessary if you are going to use the "./configure && make" build system).
 # Modify <tt>common/system.cpp</tt> and <tt>backends/intern.h</tt> to make it aware of your backend. Mostly, this means telling it about your OSystem factory function (I'll leave the code there to document itself, if you don't understand it, ask us on IRC or on our mailing list).