screen-share: Add option to start screen sharing on weston startup

Currently the screen sharing has to be manually started after weston has
started by pressing Ctrl+Alt+S on a keyboard. Add new bool config option
to the screen-share section which permits starting the screen sharing of
all outputs on weston start up. This is useful e.g. for doing screen
mirroring between two devices over network.

Signed-off-by: Marek Vasut <marex@denx.de>

compositor/screen-share.c

@@ -1165,8 +1165,10 @@ wet_module_init(struct weston_compositor *compositor,
 		int *argc, char *argv[])
 {
 	struct screen_share *ss;
+	struct weston_output *output;
 	struct weston_config *config;
 	struct weston_config_section *section;
+	bool start_on_startup = false;
 
 	ss = zalloc(sizeof *ss);
 	if (ss == NULL)
@@ -1182,5 +1184,12 @@ wet_module_init(struct weston_compositor *compositor,
 	weston_compositor_add_key_binding(compositor, KEY_S,
 				          MODIFIER_CTRL | MODIFIER_ALT,
 					  share_output_binding, ss);
+
+	if (weston_config_section_get_bool(section, "start-on-startup",
+					   &start_on_startup, false) == 0) {
+		wl_list_for_each(output, &compositor->output_list, link)
+			weston_output_share(output, ss->command);
+	}
+
 	return 0;
 }

man/weston.ini.man

@@ -669,6 +669,12 @@ sets the path to the xserver to run (string).
 sets the command to start a fullscreen-shell server for screen sharing (string).
 .RE
 .RE
+.TP 7
+.BI "start-on-startup=" "false"
+If set to true, start screen sharing of all outputs available on Weston startup.
+Set to false by default.
+.RE
+.RE
 .SH "AUTOLAUNCH SECTION"
 .TP 7
 .BI "path=" "/usr/bin/echo"

weston.ini.in

@@ -79,6 +79,7 @@ path=@libexecdir@/weston-keyboard
 
 [screen-share]
 command=@bindir@/weston --backend=rdp-backend.so --shell=fullscreen-shell.so --no-clients-resize
+#start-on-startup=false
 
 #[xwayland]
 #path=@bindir@/Xwayland