Registers a built-in icon for icon theme lookups. The idea
of built-in icons is to allow an application or library
that uses themed icons to function requiring files to
be present in the file system. For instance, the default
images for all of GTK+'s stock icons are registered
as built-icons.
In general, if you use gtk_icon_theme_add_builtin_icon()
you should also install the icon in the icon theme, so
that the icon is generally available.
This function will generally be used with pixbufs loaded
via gdk_pixbuf_new_from_inline().
Since 2.4
Registers a built-in icon for icon theme lookups. The idea of built-in icons is to allow an application or library that uses themed icons to function requiring files to be present in the file system. For instance, the default images for all of GTK+'s stock icons are registered as built-icons. In general, if you use gtk_icon_theme_add_builtin_icon() you should also install the icon in the icon theme, so that the icon is generally available. This function will generally be used with pixbufs loaded via gdk_pixbuf_new_from_inline(). Since 2.4