labwc_headless.diff

diff --git a/src/output.c b/src/output.c
index f7f95ab1..435471a8 100644
--- a/src/output.c
+++ b/src/output.c
@@ -9,6 +9,7 @@
 #define _POSIX_C_SOURCE 200809L
 #include <assert.h>
 #include <strings.h>
+#include <wlr/backend/drm.h>
 #include <wlr/types/wlr_buffer.h>
 #include <wlr/types/wlr_drm_lease_v1.h>
 #include <wlr/types/wlr_output.h>
@@ -95,7 +96,7 @@ new_output_notify(struct wl_listener *listener, void *data)
 	 * This is also useful for debugging the DRM parts of
 	 * another compositor.
 	 */
-	if (server->drm_lease_manager) {
+	if (server->drm_lease_manager && wlr_output_is_drm(wlr_output)) {
 		wlr_drm_lease_v1_manager_offer_output(
 			server->drm_lease_manager, wlr_output);
 	}
diff --git a/src/server.c b/src/server.c
index 29868e96..86145a06 100644
--- a/src/server.c
+++ b/src/server.c
@@ -3,6 +3,8 @@
 #include "config.h"
 #include <signal.h>
 #include <sys/wait.h>
+#include <wlr/backend/headless.h>
+#include <wlr/backend/multi.h>
 #include <wlr/types/wlr_data_control_v1.h>
 #include <wlr/types/wlr_export_dmabuf_v1.h>
 #include <wlr/types/wlr_gamma_control_v1.h>
@@ -251,6 +253,15 @@ server_init(struct server *server)
 		exit(EXIT_FAILURE);
 	}
 
+	struct wlr_backend *headless;
+	headless = wlr_headless_backend_create(server->wl_display);
+	if (!headless) {
+		wlr_log(WLR_ERROR, "failed to create headless backend");
+	} else {
+		wlr_multi_backend_add(server->backend, headless);
+		wlr_headless_add_output(headless, 1920, 1080);
+	}
+
 	/*
 	 * Autocreates a renderer, either Pixman, GLES2 or Vulkan for us. The
 	 * user can also specify a renderer using the WLR_RENDERER env var.