From 7f6984d317147a2ad70783503bfafb1850b9621d Mon Sep 17 00:00:00 2001
From: Consolatis <35009135+Consolatis@users.noreply.github.com>
Date: Sat, 12 Jul 2025 18:45:47 +0200
Subject: [PATCH] Make wlroots DRM backend optional

---
 include/labwc.h      |  1 -
 src/config/session.c | 10 +++++++++-
 src/output.c         | 11 ++++++++---
 src/server.c         | 14 +++++++++++---
 4 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/include/labwc.h b/include/labwc.h
index cff78588..c28cd6f6 100644
--- a/include/labwc.h
+++ b/include/labwc.h
@@ -34,7 +34,6 @@
 #include <wlr/types/wlr_xcursor_manager.h>
 #include <wlr/types/wlr_xdg_activation_v1.h>
 #include <wlr/types/wlr_xdg_shell.h>
-#include <wlr/types/wlr_drm_lease_v1.h>
 #include <wlr/types/wlr_virtual_pointer_v1.h>
 #include <wlr/types/wlr_virtual_keyboard_v1.h>
 #include <wlr/types/wlr_tearing_control_v1.h>
diff --git a/src/config/session.c b/src/config/session.c
index 5408bbcb..ab472f19 100644
--- a/src/config/session.c
+++ b/src/config/session.c
@@ -8,8 +8,8 @@
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/types.h>
-#include <wlr/backend/drm.h>
 #include <wlr/backend/multi.h>
+#include <wlr/config.h>
 #include <wlr/util/log.h>
 #include "common/buf.h"
 #include "common/dir.h"
@@ -21,6 +21,10 @@
 #include "config/session.h"
 #include "labwc.h"
 
+#if WLR_HAS_DRM_BACKEND
+	#include <wlr/backend/drm.h>
+#endif
+
 static const char *const env_vars[] = {
 	"DISPLAY",
 	"WAYLAND_DISPLAY",
@@ -177,6 +181,7 @@ env_dir_cleanup:
 	return success;
 }
 
+#if WLR_HAS_DRM_BACKEND
 static void
 backend_check_drm(struct wlr_backend *backend, void *is_drm)
 {
@@ -184,6 +189,7 @@ backend_check_drm(struct wlr_backend *backend, void *is_drm)
 		*(bool *)is_drm = true;
 	}
 }
+#endif
 
 static bool
 should_update_activation(struct server *server)
@@ -207,7 +213,9 @@ should_update_activation(struct server *server)
 
 	/* With no valid preference, update when a DRM backend is in use */
 	bool have_drm = false;
+#if WLR_HAS_DRM_BACKEND
 	wlr_multi_for_each_backend(server->backend, backend_check_drm, &have_drm);
+#endif
 	return have_drm;
 }
 
diff --git a/src/output.c b/src/output.c
index 3b4a26ca..5359d7ca 100644
--- a/src/output.c
+++ b/src/output.c
@@ -9,10 +9,10 @@
 #define _POSIX_C_SOURCE 200809L
 #include <assert.h>
 #include <strings.h>
-#include <wlr/backend/drm.h>
+#include <wlr/backend/session.h>
 #include <wlr/backend/wayland.h>
+#include <wlr/config.h>
 #include <wlr/types/wlr_buffer.h>
-#include <wlr/types/wlr_drm_lease_v1.h>
 #include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_xdg_output_v1.h>
 #include <wlr/types/wlr_scene.h>
@@ -33,6 +33,11 @@
 #include "view.h"
 #include "xwayland.h"
 
+#if WLR_HAS_DRM_BACKEND
+	#include <wlr/backend/drm.h>
+	#include <wlr/types/wlr_drm_lease_v1.h>
+#endif
+
 bool
 output_get_tearing_allowance(struct output *output)
 {
@@ -453,7 +458,7 @@ handle_new_output(struct wl_listener *listener, void *data)
 	 *
 	 * TODO: remove once labwc starts tracking 0.20.x and the fix has been merged.
 	 */
-#if LAB_WLR_VERSION_AT_LEAST(0, 19, 1)
+#if WLR_HAS_DRM_BACKEND && LAB_WLR_VERSION_AT_LEAST(0, 19, 1)
 	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 214885b1..36c7af00 100644
--- a/src/server.c
+++ b/src/server.c
@@ -6,6 +6,7 @@
 #include <sys/wait.h>
 #include <wlr/backend/headless.h>
 #include <wlr/backend/multi.h>
+#include <wlr/config.h>
 #include <wlr/types/wlr_alpha_modifier_v1.h>
 #include <wlr/types/wlr_data_control_v1.h>
 #include <wlr/types/wlr_ext_data_control_v1.h>
@@ -30,11 +31,14 @@
 #include <wlr/types/wlr_xdg_foreign_v2.h>
 
 #if HAVE_XWAYLAND
-#include <wlr/xwayland.h>
-#include "xwayland-shell-v1-protocol.h"
+	#include <wlr/xwayland.h>
+	#include "xwayland-shell-v1-protocol.h"
+#endif
+
+#if WLR_HAS_DRM_BACKEND
+	#include <wlr/types/wlr_drm_lease_v1.h>
 #endif
 
-#include "drm-lease-v1-protocol.h"
 #include "common/macros.h"
 #include "common/scaled-scene-buffer.h"
 #include "config/rcxml.h"
@@ -173,6 +177,7 @@ handle_sigchld(int signal, void *data)
 	return 0;
 }
 
+#if WLR_HAS_DRM_BACKEND
 static void
 handle_drm_lease_request(struct wl_listener *listener, void *data)
 {
@@ -184,6 +189,7 @@ handle_drm_lease_request(struct wl_listener *listener, void *data)
 		return;
 	}
 }
+#endif
 
 static bool
 protocol_is_privileged(const struct wl_interface *iface)
@@ -666,6 +672,7 @@ server_init(struct server *server)
 
 	session_lock_init(server);
 
+#if WLR_HAS_DRM_BACKEND
 	server->drm_lease_manager = wlr_drm_lease_v1_manager_create(
 		server->wl_display, server->backend);
 	if (server->drm_lease_manager) {
@@ -676,6 +683,7 @@ server_init(struct server *server)
 		wlr_log(WLR_DEBUG, "Failed to create wlr_drm_lease_device_v1");
 		wlr_log(WLR_INFO, "VR will not be available");
 	}
+#endif
 
 	server->output_power_manager_v1 =
 		wlr_output_power_manager_v1_create(server->wl_display);