Discover swaylock extension in registry

include/client/registry.h

@@ -3,6 +3,7 @@
 
 #include <wayland-client.h>
 #include "wayland-desktop-shell-client-protocol.h"
+#include "wayland-swaylock-client-protocol.h"
 #include "list.h"
 
 struct output_state {
@@ -19,6 +20,7 @@ struct registry {
         struct wl_shell *shell;
         struct wl_shm *shm;
         struct desktop_shell *desktop_shell;
+        struct lock *swaylock;
         list_t *outputs;
 };
 

swaybg/main.c

@@ -11,7 +11,6 @@
 #include "list.h"
 
 list_t *surfaces;
-
 struct registry *registry;
 
 enum scaling_mode {

swaylock/main.c

@@ -1,16 +1,43 @@
-#include "wayland-desktop-shell-client-protocol.h"
+#include "wayland-swaylock-client-protocol.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include "client/window.h"
 #include "client/registry.h"
 #include "log.h"
 
+list_t *surfaces;
+struct registry *registry;
+
+enum scaling_mode {
+	SCALING_MODE_STRETCH,
+	SCALING_MODE_FILL,
+	SCALING_MODE_FIT,
+	SCALING_MODE_CENTER,
+	SCALING_MODE_TILE,
+};
+
 void sway_terminate(void) {
 	exit(EXIT_FAILURE);
 }
 
 int main(int argc, char **argv) {
 	init_log(L_INFO);
-	sway_log(L_INFO, "Hello world");
+	surfaces = create_list();
+	registry = registry_poll();
+
+	if (!registry->swaylock) {
+		sway_abort("swaylock requires the compositor to support the swaylock extension.");
+	}
+
+	int i;
+	for (i = 0; i < registry->outputs->length; ++i) {
+		struct output_state *output = registry->outputs->items[i];
+		struct window *window = window_setup(registry, output->width, output->height, false);
+		if (!window) {
+			sway_abort("Failed to create surfaces.");
+		}
+		lock_set_lock_surface(registry->swaylock, output->output, window->surface);
+		list_add(surfaces, window);
+	}
 	return 0;
 }

wayland/registry.c

@@ -2,6 +2,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include "wayland-desktop-shell-client-protocol.h"
+#include "wayland-swaylock-client-protocol.h"
 #include "client/registry.h"
 #include "stringop.h"
 #include "log.h"
@@ -58,6 +59,8 @@ static void registry_global(void *data, struct wl_registry *registry,
 		list_add(reg->outputs, ostate);
 	} else if (strcmp(interface, desktop_shell_interface.name) == 0) {
 		reg->desktop_shell = wl_registry_bind(registry, name, &desktop_shell_interface, version);
+	} else if (strcmp(interface, lock_interface.name) == 0) {
+		reg->swaylock = wl_registry_bind(registry, name, &lock_interface, version);
 	}
 }