wip!themes: Add example twincam theme

This probably shouldn't go to plymouth upstream, but be a separate project?

configure.ac

@@ -331,6 +331,7 @@ AC_CONFIG_FILES([Makefile po/Makefile.in
            themes/spinner/Makefile
            themes/script/Makefile
            themes/bgrt/Makefile
+           themes/twincam/Makefile
            images/Makefile
 	   scripts/plymouth-generate-initrd
 	   scripts/plymouth-populate-initrd

themes/Makefile.am

@@ -1,2 +1,2 @@
-SUBDIRS = spinfinity fade-in text details solar glow script spinner tribar bgrt
+SUBDIRS = spinfinity fade-in text details solar glow script spinner tribar bgrt twincam
 MAINTAINERCLEANFILES = Makefile.in

themes/twincam/Makefile.am

@@ -0,0 +1,13 @@
+themedir = $(datadir)/plymouth/themes/twincam
+nodist_theme_DATA = twincam.plymouth
+
+MAINTAINERCLEANFILES = Makefile.in twincam.plymouth
+CLEANFILES = twincam.plymouth
+
+twincam.plymouth: $(srcdir)/twincam.plymouth.desktop
+	$(AM_V_GEN) \
+	sed -e 's,[@]PLYMOUTH_THEME_PATH[@],$(PLYMOUTH_THEME_PATH),g' \
+	$(srcdir)/twincam.plymouth.desktop | \
+	    $(MSGFMT) --desktop --template /proc/self/fd/0 -d $(top_srcdir)/po -o $@
+
+EXTRA_DIST = twincam.plymouth.desktop

themes/twincam/twincam.plymouth.desktop

@@ -0,0 +1,7 @@
+[Plymouth Theme]
+Name=Twincam
+Description=Plugin that shows the system cameras as the splash
+ModuleName=external-command
+
+[external-command]
+Command=/usr/bin/twincam