Merge pull request #11 from SirCmpwn/libinput

[WIP] libinput backend

11 files changed, 1082 insertions, 19 deletions

diff --git a/backend/CMakeLists.txt b/backend/CMakeLists.txt
index 91f0f06e..9594c318 100644
--- a/backend/CMakeLists.txt
+++ b/backend/CMakeLists.txt
@@ -2,6 +2,7 @@ include_directories(
 	${PROTOCOLS_INCLUDE_DIRS}
 	${WAYLAND_INCLUDE_DIR}
 	${DRM_INCLUDE_DIRS}
+    ${LIBINPUT_INCLUDE_DIRS}
 )
 
 add_library(wlr-backend
@@ -9,11 +10,22 @@ add_library(wlr-backend
     #wayland/registry.c
     #wayland/wl_seat.c
     #wayland/wl_output.c
+
     drm/backend.c
     drm/drm.c
-    udev.c
+
+    libinput/backend.c
+    libinput/events.c
+    libinput/keyboard.c
+    libinput/pointer.c
+    libinput/touch.c
+    libinput/tablet_tool.c
+    libinput/tablet_pad.c
+
+    multi/backend.c
     backend.c
     egl.c
+    udev.c
 )
 
 target_link_libraries(wlr-backend
@@ -26,5 +38,6 @@ target_link_libraries(wlr-backend
     ${EGL_LIBRARIES}
     ${SYSTEMD_LIBRARIES}
     ${UDEV_LIBRARIES}
+    ${LIBINPUT_LIBRARIES}
     ${GBM_LIBRARIES}
 )
diff --git a/backend/backend.c b/backend/backend.c
index 38b65dca..02fd7479 100644
--- a/backend/backend.c
+++ b/backend/backend.c
@@ -3,10 +3,15 @@
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
+#include <libinput.h>
 #include <wlr/session.h>
 #include <wlr/backend/interface.h>
+#include <wlr/backend/drm.h>
+#include <wlr/backend/libinput.h>
+#include <wlr/backend/multi.h>
+#include "backend/libinput.h"
+#include "backend/udev.h"
 #include "common/log.h"
-#include "backend/drm.h"
 
 struct wlr_backend *wlr_backend_create(const struct wlr_backend_impl *impl,
 		struct wlr_backend_state *state) {
@@ -17,14 +22,10 @@ struct wlr_backend *wlr_backend_create(const struct wlr_backend_impl *impl,
 	}
 	backend->state = state;
 	backend->impl = impl;
+	wl_signal_init(&backend->events.input_add);
+	wl_signal_init(&backend->events.input_remove);
 	wl_signal_init(&backend->events.output_add);
 	wl_signal_init(&backend->events.output_remove);
-	wl_signal_init(&backend->events.keyboard_add);
-	wl_signal_init(&backend->events.keyboard_remove);
-	wl_signal_init(&backend->events.pointer_add);
-	wl_signal_init(&backend->events.pointer_remove);
-	wl_signal_init(&backend->events.touch_add);
-	wl_signal_init(&backend->events.touch_remove);
 	return backend;
 }
 
@@ -51,12 +52,27 @@ struct wlr_backend *wlr_backend_autocreate(struct wl_display *display,
 		wlr_log(L_ERROR, "Failed to open DRM device");
 		goto error_udev;
 	}
-	struct wlr_backend *wlr;
-	wlr = wlr_drm_backend_create(display, session, udev, gpu);
-	if (!wlr) {
+	struct wlr_backend *multi = wlr_multi_backend_create();
+	if (!multi) {
 		goto error_gpu;
 	}
-	return wlr;
+	struct wlr_backend *libinput =
+		wlr_libinput_backend_create(display, session, udev);
+	if (!libinput) {
+		goto error_multi;
+	}
+	struct wlr_backend *drm =
+		wlr_drm_backend_create(display, session, udev, gpu);
+	if (!drm) {
+		goto error_libinput;
+	}
+	wlr_multi_backend_add(multi, libinput);
+	wlr_multi_backend_add(multi, drm);
+	return multi;
+error_libinput:
+	wlr_backend_destroy(libinput);
+error_multi:
+	wlr_backend_destroy(multi);
 error_gpu:
 	close(gpu);
 error_udev:
@@ -64,3 +80,7 @@ error_udev:
 error:
 	return NULL;
 }
+
+struct libinput_device *wlr_libinput_get_device_handle(struct wlr_input_device *dev) {
+	return dev->state->handle;
+}
diff --git a/backend/drm/drm.c b/backend/drm/drm.c
index d6a3f8a2..befbfb94 100644
--- a/backend/drm/drm.c
+++ b/backend/drm/drm.c
@@ -112,8 +112,8 @@ static void wlr_drm_output_end(struct wlr_output_state *output) {
 	drmModePageFlip(renderer->fd, output->crtc, fb_id, DRM_MODE_PAGE_FLIP_EVENT, output);
 	output->pageflip_pending = true;
 
-	output->bo_last = output->bo_current;
-	output->bo_current = bo;
+	output->bo[1] = output->bo[0];
+	output->bo[0] = bo;
 }
 
 void wlr_drm_output_start_renderer(struct wlr_output_state *output) {
@@ -141,8 +141,8 @@ void wlr_drm_output_start_renderer(struct wlr_output_state *output) {
 	drmModePageFlip(renderer->fd, output->crtc, fb_id,
 			DRM_MODE_PAGE_FLIP_EVENT, output);
 
-	output->bo_last = NULL;
-	output->bo_current = bo;
+	output->bo[1] = NULL;
+	output->bo[0] = bo;
 }
 
 static bool display_init_renderer(struct wlr_drm_renderer *renderer,
@@ -280,6 +280,63 @@ static void wlr_drm_output_transform(struct wlr_output_state *output,
 	output->wlr_output->transform = transform;
 }
 
+static void wlr_drm_cursor_bo_update(struct wlr_output_state *output,
+		uint32_t width, uint32_t height) {
+	if (output->cursor_width == width && output->cursor_height == height) {
+		return;
+	}
+	wlr_log(L_DEBUG, "Allocating new cursor bos");
+	struct wlr_backend_state *state =
+		wl_container_of(output->renderer, state, renderer);
+	for (size_t i = 0; i < 2; ++i) {
+		output->cursor_bo[i] = gbm_bo_create(state->renderer.gbm,
+				width, height, GBM_FORMAT_ARGB8888,
+				GBM_BO_USE_CURSOR | GBM_BO_USE_WRITE);
+		if (!output->cursor_bo[i]) {
+			wlr_log(L_ERROR, "Failed to create cursor bo");
+			return;
+		}
+		if (!get_fb_for_bo(state->fd, output->cursor_bo[i])) {
+			wlr_log(L_ERROR, "Failed to create cursor fb");
+			return;
+		}
+	}
+}
+
+static bool wlr_drm_output_set_cursor(struct wlr_output_state *output,
+		const uint8_t *buf, int32_t stride, uint32_t width, uint32_t height) {
+	struct wlr_backend_state *state =
+		wl_container_of(output->renderer, state, renderer);
+	if (!buf) {
+		drmModeSetCursor(state->fd, output->crtc, 0, 0, 0);
+		return true;
+	}
+	wlr_drm_cursor_bo_update(output, width, height);
+	struct gbm_bo *bo;
+	output->current_cursor ^= 1;
+	bo = output->cursor_bo[output->current_cursor];
+	uint32_t _buf[width * height];
+	memset(_buf, 0, sizeof(_buf));
+	for (size_t i = 0; i < height; ++i) {
+		memcpy(_buf + i * width,
+				buf + i * stride,
+				width * 4);
+	}
+	if (gbm_bo_write(bo, _buf, sizeof(_buf)) < 0) {
+		wlr_log(L_ERROR, "Failed to write cursor to bo");
+		return false;
+	}
+	return !drmModeSetCursor(state->fd, output->crtc,
+			gbm_bo_get_handle(bo).s32, width, height);
+}
+
+static bool wlr_drm_output_move_cursor(struct wlr_output_state *output,
+		int x, int y) {
+	struct wlr_backend_state *state =
+		wl_container_of(output->renderer, state, renderer);
+	return !drmModeMoveCursor(state->fd, output->crtc, x, y);
+}
+
 static void wlr_drm_output_destroy(struct wlr_output_state *output) {
 	wlr_drm_output_cleanup(output, true);
 	free(output);
@@ -289,6 +346,8 @@ static struct wlr_output_impl output_impl = {
 	.enable = wlr_drm_output_enable,
 	.set_mode = wlr_drm_output_set_mode,
 	.transform = wlr_drm_output_transform,
+	.set_cursor = wlr_drm_output_set_cursor,
+	.move_cursor = wlr_drm_output_move_cursor,
 	.destroy = wlr_drm_output_destroy,
 };
 
@@ -457,6 +516,29 @@ void wlr_drm_scan_connectors(struct wlr_backend_state *state) {
 			snprintf(wlr_output->name, sizeof(wlr_output->name), "%s-%"PRIu32,
 				 conn_name[conn->connector_type],
 				 conn->connector_type_id);
+			wlr_output->phys_width = conn->mmWidth;
+			wlr_output->phys_height = conn->mmHeight;
+			switch (conn->subpixel) {
+			case DRM_MODE_SUBPIXEL_UNKNOWN:
+				wlr_output->subpixel = WL_OUTPUT_SUBPIXEL_UNKNOWN;
+				break;
+			case DRM_MODE_SUBPIXEL_HORIZONTAL_RGB:
+				wlr_output->subpixel = WL_OUTPUT_SUBPIXEL_HORIZONTAL_RGB;
+				break;
+			case DRM_MODE_SUBPIXEL_HORIZONTAL_BGR:
+				wlr_output->subpixel = WL_OUTPUT_SUBPIXEL_HORIZONTAL_BGR;
+				break;
+			case DRM_MODE_SUBPIXEL_VERTICAL_RGB:
+				wlr_output->subpixel = WL_OUTPUT_SUBPIXEL_VERTICAL_RGB;
+				break;
+			case DRM_MODE_SUBPIXEL_VERTICAL_BGR:
+				wlr_output->subpixel = WL_OUTPUT_SUBPIXEL_VERTICAL_BGR;
+				break;
+			case DRM_MODE_SUBPIXEL_NONE:
+			default:
+				wlr_output->subpixel = WL_OUTPUT_SUBPIXEL_NONE;
+				break;
+			}
 
 			drmModeEncoder *curr_enc = drmModeGetEncoder(state->fd, conn->encoder_id);
 			if (curr_enc) {
@@ -519,9 +601,9 @@ static void page_flip_handler(int fd, unsigned seq,
 	struct wlr_backend_state *state =
 		wl_container_of(output->renderer, state, renderer);
 
-	if (output->bo_last) {
-		gbm_surface_release_buffer(output->gbm, output->bo_last);
-		output->bo_last = NULL;
+	if (output->bo[1]) {
+		gbm_surface_release_buffer(output->gbm, output->bo[1]);
+		output->bo[1] = NULL;
 	}
 
 	output->pageflip_pending = false;
diff --git a/backend/libinput/backend.c b/backend/libinput/backend.c
new file mode 100644
index 00000000..82ba44a6
--- /dev/null
+++ b/backend/libinput/backend.c
@@ -0,0 +1,121 @@
+#include <stdlib.h>
+#include <assert.h>
+#include <libinput.h>
+#include <wlr/session.h>
+#include <wlr/backend/interface.h>
+#include "backend/udev.h"
+#include "backend/libinput.h"
+#include "common/log.h"
+
+static int wlr_libinput_open_restricted(const char *path,
+		int flags, void *_state) {
+	struct wlr_backend_state *state = _state;
+	return wlr_session_open_file(state->session, path);
+}
+
+static void wlr_libinput_close_restricted(int fd, void *_state) {
+	struct wlr_backend_state *state = _state;
+	wlr_session_close_file(state->session, fd);
+}
+
+static const struct libinput_interface libinput_impl = {
+	.open_restricted = wlr_libinput_open_restricted,
+	.close_restricted = wlr_libinput_close_restricted
+};
+
+static int wlr_libinput_readable(int fd, uint32_t mask, void *_state) {
+	struct wlr_backend_state *state = _state;
+	if (libinput_dispatch(state->libinput) != 0) {
+		wlr_log(L_ERROR, "Failed to dispatch libinput");
+		// TODO: some kind of abort?
+		return 0;
+	}
+	struct libinput_event *event;
+	while ((event = libinput_get_event(state->libinput))) {
+		wlr_libinput_event(state, event);
+	}
+	return 0;
+}
+
+static void wlr_libinput_log(struct libinput *libinput,
+		enum libinput_log_priority priority, const char *fmt, va_list args) {
+	_wlr_vlog(L_ERROR, fmt, args);
+}
+
+static bool wlr_libinput_backend_init(struct wlr_backend_state *state) {
+	wlr_log(L_DEBUG, "Initializing libinput");
+	state->libinput = libinput_udev_create_context(&libinput_impl, state,
+			state->udev->udev);
+	if (!state->libinput) {
+		wlr_log(L_ERROR, "Failed to create libinput context");
+		return false;
+	}
+
+	// TODO: Let user customize seat used
+	if (libinput_udev_assign_seat(state->libinput, "seat0") != 0) {
+		wlr_log(L_ERROR, "Failed to assign libinput seat");
+		return false;
+	}
+
+	// TODO: More sophisticated logging
+	libinput_log_set_handler(state->libinput, wlr_libinput_log);
+	libinput_log_set_priority(state->libinput, LIBINPUT_LOG_PRIORITY_ERROR);
+
+	struct wl_event_loop *event_loop =
+		wl_display_get_event_loop(state->display);
+	if (state->input_event) {
+		wl_event_source_remove(state->input_event);
+	}
+	state->input_event = wl_event_loop_add_fd(event_loop,
+			libinput_get_fd(state->libinput), WL_EVENT_READABLE,
+			wlr_libinput_readable, state);
+	if (!state->input_event) {
+		wlr_log(L_ERROR, "Failed to create input event on event loop");
+		return false;
+	}
+	wlr_log(L_DEBUG, "libinput sucessfully initialized");
+	return true;
+}
+
+static void wlr_libinput_backend_destroy(struct wlr_backend_state *state) {
+	// TODO
+}
+
+static struct wlr_backend_impl backend_impl = {
+	.init = wlr_libinput_backend_init,
+	.destroy = wlr_libinput_backend_destroy
+};
+
+struct wlr_backend *wlr_libinput_backend_create(struct wl_display *display,
+		struct wlr_session *session, struct wlr_udev *udev) {
+	assert(display && session && udev);
+
+	struct wlr_backend_state *state = calloc(1, sizeof(struct wlr_backend_state));
+	if (!state) {
+		wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
+		return NULL;
+	}
+
+	struct wlr_backend *backend = wlr_backend_create(&backend_impl, state);
+	if (!backend) {
+		wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
+		goto error_state;
+	}
+
+	if (!(state->devices = list_create())) {
+		wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
+		goto error_backend;
+	}
+
+	state->backend = backend;
+	state->session = session;
+	state->udev = udev;
+	state->display = display;
+
+	return backend;
+error_state:
+	free(state);
+error_backend:
+	wlr_backend_destroy(backend);
+	return NULL;
+}
diff --git a/backend/libinput/events.c b/backend/libinput/events.c
new file mode 100644
index 00000000..2e7cc541
--- /dev/null
+++ b/backend/libinput/events.c
@@ -0,0 +1,188 @@
+#include <stdlib.h>
+#include <assert.h>
+#include <libinput.h>
+#include <wlr/session.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "backend/libinput.h"
+#include "common/log.h"
+#include "types.h"
+
+struct wlr_input_device *get_appropriate_device(
+		enum wlr_input_device_type desired_type,
+		struct libinput_device *device) {
+	list_t *devices = libinput_device_get_user_data(device);
+	if (!devices) {
+		return NULL;
+	}
+	for (size_t i = 0; i < devices->length; ++i) {
+		struct wlr_input_device *dev = devices->items[i];
+		if (dev->type == desired_type) {
+			return dev;
+		}
+	}
+	return NULL;
+}
+
+static void wlr_libinput_device_destroy(struct wlr_input_device_state *state) {
+	libinput_device_unref(state->handle);
+	free(state);
+}
+
+static struct wlr_input_device_impl input_device_impl = {
+	.destroy = wlr_libinput_device_destroy
+};
+
+static struct wlr_input_device *allocate_device(
+		struct wlr_backend_state *state, struct libinput_device *device,
+		list_t *devices, enum wlr_input_device_type type) {
+	int vendor = libinput_device_get_id_vendor(device);
+	int product = libinput_device_get_id_product(device);
+	const char *name = libinput_device_get_name(device);
+	struct wlr_input_device_state *devstate =
+		calloc(1, sizeof(struct wlr_input_device_state));
+	devstate->handle = device;
+	libinput_device_ref(device);
+	struct wlr_input_device *wlr_device = wlr_input_device_create(
+		type, &input_device_impl, devstate,
+		name, vendor, product);
+	list_add(devices, wlr_device);
+	list_add(state->devices, wlr_device);
+	return wlr_device;
+}
+
+static void handle_device_added(struct wlr_backend_state *state,
+		struct libinput_device *device) {
+	assert(state && device);
+	/*
+	 * Note: the wlr API exposes only devices with a single capability, because
+	 * that meshes better with how Wayland does things and is a bit simpler.
+	 * However, libinput devices often have multiple capabilities - in such
+	 * cases we have to create several devices.
+	 */
+	int vendor = libinput_device_get_id_vendor(device);
+	int product = libinput_device_get_id_product(device);
+	const char *name = libinput_device_get_name(device);
+	list_t *devices = list_create();
+	wlr_log(L_DEBUG, "Added %s [%d:%d]", name, vendor, product);
+
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_KEYBOARD)) {
+		struct wlr_input_device *wlr_device = allocate_device(state,
+				device, devices, WLR_INPUT_DEVICE_KEYBOARD);
+		wlr_device->keyboard = wlr_libinput_keyboard_create(device);
+		wl_signal_emit(&state->backend->events.input_add, wlr_device);
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_POINTER)) {
+		struct wlr_input_device *wlr_device = allocate_device(state,
+				device, devices, WLR_INPUT_DEVICE_POINTER);
+		wlr_device->pointer = wlr_libinput_pointer_create(device);
+		wl_signal_emit(&state->backend->events.input_add, wlr_device);
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_TOUCH)) {
+		struct wlr_input_device *wlr_device = allocate_device(state,
+				device, devices, WLR_INPUT_DEVICE_TOUCH);
+		wlr_device->touch = wlr_libinput_touch_create(device);
+		wl_signal_emit(&state->backend->events.input_add, wlr_device);
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_TABLET_TOOL)) {
+		struct wlr_input_device *wlr_device = allocate_device(state,
+				device, devices, WLR_INPUT_DEVICE_TABLET_TOOL);
+		wlr_device->tablet_tool = wlr_libinput_tablet_tool_create(device);
+		wl_signal_emit(&state->backend->events.input_add, wlr_device);
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_TABLET_PAD)) {
+		struct wlr_input_device *wlr_device = allocate_device(state,
+				device, devices, WLR_INPUT_DEVICE_TABLET_PAD);
+		wlr_device->tablet_pad = wlr_libinput_tablet_pad_create(device);
+		wl_signal_emit(&state->backend->events.input_add, wlr_device);
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_GESTURE)) {
+		// TODO
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_SWITCH)) {
+		// TODO
+	}
+
+	if (devices->length > 0) {
+		libinput_device_set_user_data(device, devices);
+	} else {
+		list_free(devices);
+	}
+}
+
+static void handle_device_removed(struct wlr_backend_state *state,
+		struct libinput_device *device) {
+	wlr_log(L_DEBUG, "libinput device removed");
+	// TODO
+}
+
+void wlr_libinput_event(struct wlr_backend_state *state,
+		struct libinput_event *event) {
+	assert(state && event);
+	struct libinput *context = libinput_event_get_context(event);
+	struct libinput_device *device = libinput_event_get_device(event);
+	enum libinput_event_type event_type = libinput_event_get_type(event);
+	(void)context;
+	switch (event_type) {
+	case LIBINPUT_EVENT_DEVICE_ADDED:
+		handle_device_added(state, device);
+		break;
+	case LIBINPUT_EVENT_DEVICE_REMOVED:
+		handle_device_removed(state, device);
+		break;
+	case LIBINPUT_EVENT_KEYBOARD_KEY:
+		handle_keyboard_key(event, device);
+		break;
+	case LIBINPUT_EVENT_POINTER_MOTION:
+		handle_pointer_motion(event, device);
+		break;
+	case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
+		handle_pointer_motion_abs(event, device);
+		break;
+	case LIBINPUT_EVENT_POINTER_BUTTON:
+		handle_pointer_button(event, device);
+		break;
+	case LIBINPUT_EVENT_POINTER_AXIS:
+		handle_pointer_axis(event, device);
+		break;
+	case LIBINPUT_EVENT_TOUCH_DOWN:
+		handle_touch_down(event, device);
+		break;
+	case LIBINPUT_EVENT_TOUCH_UP:
+		handle_touch_up(event, device);
+		break;
+	case LIBINPUT_EVENT_TOUCH_MOTION:
+		handle_touch_motion(event, device);
+		break;
+	case LIBINPUT_EVENT_TOUCH_CANCEL:
+		handle_touch_cancel(event, device);
+		break;
+	case LIBINPUT_EVENT_TOUCH_FRAME:
+		// no-op (at least for now)
+		break;
+	case LIBINPUT_EVENT_TABLET_TOOL_AXIS:
+		handle_tablet_tool_axis(event, device);
+		break;
+	case LIBINPUT_EVENT_TABLET_TOOL_PROXIMITY:
+		handle_tablet_tool_proximity(event, device);
+		break;
+	case LIBINPUT_EVENT_TABLET_TOOL_TIP:
+		handle_tablet_tool_tip(event, device);
+		break;
+	case LIBINPUT_EVENT_TABLET_TOOL_BUTTON:
+		handle_tablet_tool_button(event, device);
+		break;
+	case LIBINPUT_EVENT_TABLET_PAD_BUTTON:
+		handle_tablet_pad_button(event, device);
+		break;
+	case LIBINPUT_EVENT_TABLET_PAD_RING:
+		handle_tablet_pad_ring(event, device);
+		break;
+	case LIBINPUT_EVENT_TABLET_PAD_STRIP:
+		handle_tablet_pad_strip(event, device);
+		break;
+	default:
+		wlr_log(L_DEBUG, "Unknown libinput event %d", event_type);
+		break;
+	}
+}
diff --git a/backend/libinput/keyboard.c b/backend/libinput/keyboard.c
new file mode 100644
index 00000000..f94f0103
--- /dev/null
+++ b/backend/libinput/keyboard.c
@@ -0,0 +1,65 @@
+#include <stdlib.h>
+#include <assert.h>
+#include <libinput.h>
+#include <wlr/session.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "backend/libinput.h"
+#include "common/log.h"
+#include "types.h"
+
+struct wlr_keyboard_state {
+	struct libinput_device *device;
+};
+
+static void wlr_libinput_keyboard_set_leds(struct wlr_keyboard_state *kbstate, uint32_t leds) {
+	libinput_device_led_update(kbstate->device, leds);
+}
+
+static void wlr_libinput_keyboard_destroy(struct wlr_keyboard_state *kbstate) {
+	libinput_device_unref(kbstate->device);
+	free(kbstate);
+}
+
+struct wlr_keyboard_impl impl = {
+	.destroy = wlr_libinput_keyboard_destroy,
+	.led_update = wlr_libinput_keyboard_set_leds
+};
+
+struct wlr_keyboard *wlr_libinput_keyboard_create(
+		struct libinput_device *device) {
+	assert(device);
+	struct wlr_keyboard_state *kbstate = calloc(1, sizeof(struct wlr_keyboard_state));
+	kbstate->device = device;
+	libinput_device_ref(device);
+	libinput_device_led_update(device, 0);
+	return wlr_keyboard_create(&impl, kbstate);
+}
+
+void handle_keyboard_key(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_KEYBOARD, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a keyboard event for a device with no keyboards?");
+		return;
+	}
+	struct libinput_event_keyboard *kbevent =
+		libinput_event_get_keyboard_event(event);
+	struct wlr_keyboard_key *wlr_event =
+		calloc(1, sizeof(struct wlr_keyboard_key));
+	wlr_event->time_sec = libinput_event_keyboard_get_time(kbevent);
+	wlr_event->time_usec = libinput_event_keyboard_get_time_usec(kbevent);
+	wlr_event->keycode = libinput_event_keyboard_get_key(kbevent);
+	enum libinput_key_state state = 
+		libinput_event_keyboard_get_key_state(kbevent);
+	switch (state) {
+	case LIBINPUT_KEY_STATE_RELEASED:
+		wlr_event->state = WLR_KEY_RELEASED;
+		break;
+	case LIBINPUT_KEY_STATE_PRESSED:
+		wlr_event->state = WLR_KEY_PRESSED;
+		break;
+	}
+	wl_signal_emit(&dev->keyboard->events.key, wlr_event);
+}
diff --git a/backend/libinput/pointer.c b/backend/libinput/pointer.c
new file mode 100644
index 00000000..0139fd60
--- /dev/null
+++ b/backend/libinput/pointer.c
@@ -0,0 +1,129 @@
+#include <stdlib.h>
+#include <assert.h>
+#include <libinput.h>
+#include <wlr/session.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "backend/libinput.h"
+#include "common/log.h"
+#include "types.h"
+
+struct wlr_pointer *wlr_libinput_pointer_create(
+		struct libinput_device *device) {
+	assert(device);
+	return wlr_pointer_create(NULL, NULL);
+}
+
+void handle_pointer_motion(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_POINTER, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a pointer event for a device with no pointers?");
+		return;
+	}
+	struct libinput_event_pointer *pevent =
+		libinput_event_get_pointer_event(event);
+	struct wlr_pointer_motion *wlr_event =
+		calloc(1, sizeof(struct wlr_pointer_motion));
+	wlr_event->time_sec = libinput_event_pointer_get_time(pevent);
+	wlr_event->time_usec = libinput_event_pointer_get_time_usec(pevent);
+	wlr_event->delta_x = libinput_event_pointer_get_dx(pevent);
+	wlr_event->delta_y = libinput_event_pointer_get_dy(pevent);
+	wl_signal_emit(&dev->pointer->events.motion, wlr_event);
+}
+
+void handle_pointer_motion_abs(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_POINTER, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a pointer event for a device with no pointers?");
+		return;
+	}
+	struct libinput_event_pointer *pevent =
+		libinput_event_get_pointer_event(event);
+	struct wlr_pointer_motion_absolute *wlr_event =
+		calloc(1, sizeof(struct wlr_pointer_motion_absolute));
+	wlr_event->time_sec = libinput_event_pointer_get_time(pevent);
+	wlr_event->time_usec = libinput_event_pointer_get_time_usec(pevent);
+	wlr_event->x_mm = libinput_event_pointer_get_absolute_x(pevent);
+	wlr_event->y_mm = libinput_event_pointer_get_absolute_y(pevent);
+	libinput_device_get_size(device, &wlr_event->width_mm, &wlr_event->height_mm);
+	wl_signal_emit(&dev->pointer->events.motion_absolute, wlr_event);
+}
+
+void handle_pointer_button(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_POINTER, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a pointer event for a device with no pointers?");
+		return;
+	}
+	struct libinput_event_pointer *pevent =
+		libinput_event_get_pointer_event(event);
+	struct wlr_pointer_button *wlr_event =
+		calloc(1, sizeof(struct wlr_pointer_button));
+	wlr_event->time_sec = libinput_event_pointer_get_time(pevent);
+	wlr_event->time_usec = libinput_event_pointer_get_time_usec(pevent);
+	wlr_event->button = libinput_event_pointer_get_button(pevent);
+	switch (libinput_event_pointer_get_button_state(pevent)) {
+	case LIBINPUT_BUTTON_STATE_PRESSED:
+		wlr_event->state = WLR_BUTTON_PRESSED;
+		break;
+	case LIBINPUT_BUTTON_STATE_RELEASED:
+		wlr_event->state = WLR_BUTTON_RELEASED;
+		break;
+	}
+	wl_signal_emit(&dev->pointer->events.button, wlr_event);
+}
+
+void handle_pointer_axis(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_POINTER, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a pointer event for a device with no pointers?");
+		return;
+	}
+	struct libinput_event_pointer *pevent =
+		libinput_event_get_pointer_event(event);
+	struct wlr_pointer_axis *wlr_event =
+		calloc(1, sizeof(struct wlr_pointer_axis));
+	wlr_event->time_sec = libinput_event_pointer_get_time(pevent);
+	wlr_event->time_usec = libinput_event_pointer_get_time_usec(pevent);
+	switch (libinput_event_pointer_get_axis_source(pevent)) {
+	case LIBINPUT_POINTER_AXIS_SOURCE_WHEEL:
+		wlr_event->source = WLR_AXIS_SOURCE_WHEEL;
+		break;
+	case LIBINPUT_POINTER_AXIS_SOURCE_FINGER:
+		wlr_event->source = WLR_AXIS_SOURCE_FINGER;
+		break;
+	case LIBINPUT_POINTER_AXIS_SOURCE_CONTINUOUS:
+		wlr_event->source = WLR_AXIS_SOURCE_CONTINUOUS;
+		break;
+	case LIBINPUT_POINTER_AXIS_SOURCE_WHEEL_TILT:
+		wlr_event->source = WLR_AXIS_SOURCE_WHEEL_TILT;
+		break;
+	}
+	enum libinput_pointer_axis axies[] = {
+		LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL,
+		LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL,
+	};
+	for (size_t i = 0; i < sizeof(axies) / sizeof(axies[0]); ++i) {
+		if (libinput_event_pointer_has_axis(pevent, axies[i])) {
+			switch (axies[i]) {
+			case LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL:
+				wlr_event->orientation = WLR_AXIS_ORIENTATION_VERTICAL;
+				break;
+			case LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL:
+				wlr_event->orientation = WLR_AXIS_ORIENTATION_HORIZONTAL;
+				break;
+			}
+			wlr_event->delta = libinput_event_pointer_get_axis_value(
+					pevent, axies[i]);
+		}
+		wl_signal_emit(&dev->pointer->events.axis, wlr_event);
+	}
+}
diff --git a/backend/libinput/tablet_pad.c b/backend/libinput/tablet_pad.c
new file mode 100644
index 00000000..ee7c82f8
--- /dev/null
+++ b/backend/libinput/tablet_pad.c
@@ -0,0 +1,95 @@
+#include <stdlib.h>
+#include <assert.h>
+#include <libinput.h>
+#include <wlr/session.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "backend/libinput.h"
+#include "common/log.h"
+#include "types.h"
+
+struct wlr_tablet_pad *wlr_libinput_tablet_pad_create(
+		struct libinput_device *device) {
+	assert(device);
+	return wlr_tablet_pad_create(NULL, NULL);
+}
+
+void handle_tablet_pad_button(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TABLET_PAD, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a tablet pad event for a device with no tablet pad?");
+		return;
+	}
+	struct libinput_event_tablet_pad *pevent =
+		libinput_event_get_tablet_pad_event(event);
+	struct wlr_tablet_pad_button *wlr_event =
+		calloc(1, sizeof(struct wlr_tablet_pad_button));
+	wlr_event->time_sec = libinput_event_tablet_pad_get_time(pevent);
+	wlr_event->time_usec = libinput_event_tablet_pad_get_time_usec(pevent);
+	wlr_event->button = libinput_event_tablet_pad_get_button_number(pevent);
+	switch (libinput_event_tablet_pad_get_button_state(pevent)) {
+	case LIBINPUT_BUTTON_STATE_PRESSED:
+		wlr_event->state = WLR_BUTTON_PRESSED;
+		break;
+	case LIBINPUT_BUTTON_STATE_RELEASED:
+		wlr_event->state = WLR_BUTTON_RELEASED;
+		break;
+	}
+	wl_signal_emit(&dev->tablet_pad->events.button, wlr_event);
+}
+
+void handle_tablet_pad_ring(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TABLET_PAD, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a tablet pad event for a device with no tablet pad?");
+		return;
+	}
+	struct libinput_event_tablet_pad *pevent =
+		libinput_event_get_tablet_pad_event(event);
+	struct wlr_tablet_pad_ring *wlr_event =
+		calloc(1, sizeof(struct wlr_tablet_pad_ring));
+	wlr_event->time_sec = libinput_event_tablet_pad_get_time(pevent);
+	wlr_event->time_usec = libinput_event_tablet_pad_get_time_usec(pevent);
+	wlr_event->ring = libinput_event_tablet_pad_get_ring_number(pevent);
+	wlr_event->position = libinput_event_tablet_pad_get_ring_position(pevent);
+	switch (libinput_event_tablet_pad_get_ring_source(pevent)) {
+	case LIBINPUT_TABLET_PAD_RING_SOURCE_UNKNOWN:
+		wlr_event->source = WLR_TABLET_PAD_RING_SOURCE_UNKNOWN;
+		break;
+	case LIBINPUT_TABLET_PAD_RING_SOURCE_FINGER:
+		wlr_event->source = WLR_TABLET_PAD_RING_SOURCE_FINGER;
+		break;
+	}
+	wl_signal_emit(&dev->tablet_pad->events.ring, wlr_event);
+}
+
+void handle_tablet_pad_strip(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TABLET_PAD, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a tablet pad event for a device with no tablet pad?");
+		return;
+	}
+	struct libinput_event_tablet_pad *pevent =
+		libinput_event_get_tablet_pad_event(event);
+	struct wlr_tablet_pad_strip *wlr_event =
+		calloc(1, sizeof(struct wlr_tablet_pad_strip));
+	wlr_event->time_sec = libinput_event_tablet_pad_get_time(pevent);
+	wlr_event->time_usec = libinput_event_tablet_pad_get_time_usec(pevent);
+	wlr_event->strip = libinput_event_tablet_pad_get_strip_number(pevent);
+	wlr_event->position = libinput_event_tablet_pad_get_strip_position(pevent);
+	switch (libinput_event_tablet_pad_get_strip_source(pevent)) {
+	case LIBINPUT_TABLET_PAD_STRIP_SOURCE_UNKNOWN:
+		wlr_event->source = WLR_TABLET_PAD_STRIP_SOURCE_UNKNOWN;
+		break;
+	case LIBINPUT_TABLET_PAD_STRIP_SOURCE_FINGER:
+		wlr_event->source = WLR_TABLET_PAD_STRIP_SOURCE_FINGER;
+		break;
+	}
+	wl_signal_emit(&dev->tablet_pad->events.strip, wlr_event);
+}
diff --git a/backend/libinput/tablet_tool.c b/backend/libinput/tablet_tool.c
new file mode 100644
index 00000000..e8a3bc7d
--- /dev/null
+++ b/backend/libinput/tablet_tool.c
@@ -0,0 +1,150 @@
+#include <stdlib.h>
+#include <assert.h>
+#include <libinput.h>
+#include <wlr/session.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "backend/libinput.h"
+#include "common/log.h"
+#include "types.h"
+
+struct wlr_tablet_tool *wlr_libinput_tablet_tool_create(
+		struct libinput_device *device) {
+	assert(device);
+	return wlr_tablet_tool_create(NULL, NULL);
+}
+
+void handle_tablet_tool_axis(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TABLET_TOOL, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a tablet tool event for a device with no tablet tools?");
+		return;
+	}
+	struct libinput_event_tablet_tool *tevent =
+		libinput_event_get_tablet_tool_event(event);
+	struct wlr_tablet_tool_axis *wlr_event =
+		calloc(1, sizeof(struct wlr_tablet_tool_axis));
+	wlr_event->time_sec = libinput_event_tablet_tool_get_time(tevent);
+	wlr_event->time_usec = libinput_event_tablet_tool_get_time_usec(tevent);
+	libinput_device_get_size(device, &wlr_event->width_mm, &wlr_event->height_mm);
+	if (libinput_event_tablet_tool_x_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_X;
+		wlr_event->x_mm = libinput_event_tablet_tool_get_x(tevent);
+	}
+	if (libinput_event_tablet_tool_y_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_Y;
+		wlr_event->y_mm = libinput_event_tablet_tool_get_y(tevent);
+	}
+	if (libinput_event_tablet_tool_pressure_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_PRESSURE;
+		wlr_event->pressure = libinput_event_tablet_tool_get_pressure(tevent);
+	}
+	if (libinput_event_tablet_tool_distance_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_DISTANCE;
+		wlr_event->distance = libinput_event_tablet_tool_get_distance(tevent);
+	}
+	if (libinput_event_tablet_tool_tilt_x_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_TILT_X;
+		wlr_event->tilt_x = libinput_event_tablet_tool_get_tilt_x(tevent);
+	}
+	if (libinput_event_tablet_tool_tilt_y_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_TILT_Y;
+		wlr_event->tilt_y = libinput_event_tablet_tool_get_tilt_y(tevent);
+	}
+	if (libinput_event_tablet_tool_rotation_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_ROTATION;
+		wlr_event->rotation = libinput_event_tablet_tool_get_rotation(tevent);
+	}
+	if (libinput_event_tablet_tool_slider_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_SLIDER;
+		wlr_event->slider = libinput_event_tablet_tool_get_slider_position(tevent);
+	}
+	if (libinput_event_tablet_tool_wheel_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_WHEEL;
+		wlr_event->wheel_delta = libinput_event_tablet_tool_get_wheel_delta(tevent);
+	}
+	wl_signal_emit(&dev->tablet_tool->events.axis, wlr_event);
+}
+
+void handle_tablet_tool_proximity(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TABLET_TOOL, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a tablet tool event for a device with no tablet tools?");
+		return;
+	}
+	struct libinput_event_tablet_tool *tevent =
+		libinput_event_get_tablet_tool_event(event);
+	struct wlr_tablet_tool_proximity *wlr_event =
+		calloc(1, sizeof(struct wlr_tablet_tool_proximity));
+	wlr_event->time_sec = libinput_event_tablet_tool_get_time(tevent);
+	wlr_event->time_usec = libinput_event_tablet_tool_get_time_usec(tevent);
+	switch (libinput_event_tablet_tool_get_proximity_state(tevent)) {
+	case LIBINPUT_TABLET_TOOL_PROXIMITY_STATE_OUT:
+		wlr_event->state = WLR_TABLET_TOOL_PROXIMITY_OUT;
+		break;
+	case LIBINPUT_TABLET_TOOL_PROXIMITY_STATE_IN:
+		wlr_event->state = WLR_TABLET_TOOL_PROXIMITY_IN;
+		handle_tablet_tool_axis(event, device);
+		break;
+	}
+	wl_signal_emit(&dev->tablet_tool->events.proximity, wlr_event);
+}
+
+void handle_tablet_tool_tip(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TABLET_TOOL, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a tablet tool event for a device with no tablet tools?");
+		return;
+	}
+	handle_tablet_tool_axis(event, device);
+	struct libinput_event_tablet_tool *tevent =
+		libinput_event_get_tablet_tool_event(event);
+	struct wlr_tablet_tool_tip *wlr_event =
+		calloc(1, sizeof(struct wlr_tablet_tool_tip));
+	wlr_event->time_sec = libinput_event_tablet_tool_get_time(tevent);
+	wlr_event->time_usec = libinput_event_tablet_tool_get_time_usec(tevent);
+	switch (libinput_event_tablet_tool_get_tip_state(tevent)) {
+	case LIBINPUT_TABLET_TOOL_TIP_UP:
+		wlr_event->state = WLR_TABLET_TOOL_TIP_UP;
+		break;
+	case LIBINPUT_TABLET_TOOL_TIP_DOWN:
+		wlr_event->state = WLR_TABLET_TOOL_TIP_DOWN;
+		break;
+	}
+	wl_signal_emit(&dev->tablet_tool->events.tip, wlr_event);
+}
+
+void handle_tablet_tool_button(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TABLET_TOOL, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a tablet tool event for a device with no tablet tools?");
+		return;
+	}
+	// Tip events contain axis information. We update this information
+	// before we send the proximity event
+	handle_tablet_tool_axis(event, device);
+	struct libinput_event_tablet_tool *tevent =
+		libinput_event_get_tablet_tool_event(event);
+	struct wlr_tablet_tool_button *wlr_event =
+		calloc(1, sizeof(struct wlr_tablet_tool_button));
+	wlr_event->time_sec = libinput_event_tablet_tool_get_time(tevent);
+	wlr_event->time_usec = libinput_event_tablet_tool_get_time_usec(tevent);
+	wlr_event->button = libinput_event_tablet_tool_get_button(tevent);
+	switch (libinput_event_tablet_tool_get_button_state(tevent)) {
+	case LIBINPUT_BUTTON_STATE_RELEASED:
+		wlr_event->state = WLR_BUTTON_RELEASED;
+		break;
+	case LIBINPUT_BUTTON_STATE_PRESSED:
+		wlr_event->state = WLR_BUTTON_PRESSED;
+		break;
+	}
+	wl_signal_emit(&dev->tablet_tool->events.button, wlr_event);
+}
diff --git a/backend/libinput/touch.c b/backend/libinput/touch.c
new file mode 100644
index 00000000..02c9cfef
--- /dev/null
+++ b/backend/libinput/touch.c
@@ -0,0 +1,93 @@
+#include <stdlib.h>
+#include <assert.h>
+#include <libinput.h>
+#include <wlr/session.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "backend/libinput.h"
+#include "common/log.h"
+#include "types.h"
+
+struct wlr_touch *wlr_libinput_touch_create(
+		struct libinput_device *device) {
+	assert(device);
+	return wlr_touch_create(NULL, NULL);
+}
+
+void handle_touch_down(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TOUCH, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a touch event for a device with no touch?");
+		return;
+	}
+	struct libinput_event_touch *tevent =
+		libinput_event_get_touch_event(event);
+	struct wlr_touch_down *wlr_event =
+		calloc(1, sizeof(struct wlr_touch_down));
+	wlr_event->time_sec = libinput_event_touch_get_time(tevent);
+	wlr_event->time_usec = libinput_event_touch_get_time_usec(tevent);
+	wlr_event->slot = libinput_event_touch_get_slot(tevent);
+	wlr_event->x_mm = libinput_event_touch_get_x(tevent);
+	wlr_event->y_mm = libinput_event_touch_get_y(tevent);
+	libinput_device_get_size(device, &wlr_event->width_mm, &wlr_event->height_mm);
+	wl_signal_emit(&dev->touch->events.down, wlr_event);
+}
+
+void handle_touch_up(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TOUCH, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a touch event for a device with no touch?");
+		return;
+	}
+	struct libinput_event_touch *tevent =
+		libinput_event_get_touch_event(event);
+	struct wlr_touch_up *wlr_event =
+		calloc(1, sizeof(struct wlr_touch_up));
+	wlr_event->time_sec = libinput_event_touch_get_time(tevent);
+	wlr_event->time_usec = libinput_event_touch_get_time_usec(tevent);
+	wlr_event->slot = libinput_event_touch_get_slot(tevent);
+	wl_signal_emit(&dev->touch->events.up, wlr_event);
+}
+
+void handle_touch_motion(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TOUCH, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a touch event for a device with no touch?");
+		return;
+	}
+	struct libinput_event_touch *tevent =
+		libinput_event_get_touch_event(event);
+	struct wlr_touch_motion *wlr_event =
+		calloc(1, sizeof(struct wlr_touch_motion));
+	wlr_event->time_sec = libinput_event_touch_get_time(tevent);
+	wlr_event->time_usec = libinput_event_touch_get_time_usec(tevent);
+	wlr_event->slot = libinput_event_touch_get_slot(tevent);
+	wlr_event->x_mm = libinput_event_touch_get_x(tevent);
+	wlr_event->y_mm = libinput_event_touch_get_y(tevent);
+	libinput_device_get_size(device, &wlr_event->width_mm, &wlr_event->height_mm);
+	wl_signal_emit(&dev->touch->events.motion, wlr_event);
+}
+
+void handle_touch_cancel(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TOUCH, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a touch event for a device with no touch?");
+		return;
+	}
+	struct libinput_event_touch *tevent =
+		libinput_event_get_touch_event(event);
+	struct wlr_touch_cancel *wlr_event =
+		calloc(1, sizeof(struct wlr_touch_cancel));
+	wlr_event->time_sec = libinput_event_touch_get_time(tevent);
+	wlr_event->time_usec = libinput_event_touch_get_time_usec(tevent);
+	wlr_event->slot = libinput_event_touch_get_slot(tevent);
+	wl_signal_emit(&dev->touch->events.cancel, wlr_event);
+}
diff --git a/backend/multi/backend.c b/backend/multi/backend.c
new file mode 100644
index 00000000..e3d87ccc
--- /dev/null
+++ b/backend/multi/backend.c
@@ -0,0 +1,107 @@
+#include <stdbool.h>
+#include <stdlib.h>
+#include <wlr/backend/interface.h>
+#include <wlr/common/log.h>
+#include "backend/multi.h"
+#include "common/log.h"
+
+struct subbackend_state {
+	struct wlr_backend *backend;
+	struct wlr_backend *container;
+	struct wl_listener input_add;
+	struct wl_listener input_remove;
+	struct wl_listener output_add;
+	struct wl_listener output_remove;
+};
+
+static bool multi_backend_init(struct wlr_backend_state *state) {
+	for (size_t i = 0; i < state->backends->length; ++i) {
+		struct subbackend_state *sub = state->backends->items[i];
+		if (!wlr_backend_init(sub->backend)) {
+			wlr_log(L_ERROR, "Failed to initialize backend %zd", i);
+			return false;
+		}
+	}
+	return true;
+}
+
+static void multi_backend_destroy(struct wlr_backend_state *state) {
+	for (size_t i = 0; i < state->backends->length; ++i) {
+		struct subbackend_state *sub = state->backends->items[i];
+		wlr_backend_destroy(sub->backend);
+		free(sub);
+	}
+	list_free(state->backends);
+	free(state);
+}
+
+struct wlr_backend_impl backend_impl = {
+	.init = multi_backend_init,
+	.destroy = multi_backend_destroy
+};
+
+struct wlr_backend *wlr_multi_backend_create() {
+	struct wlr_backend_state *state =
+		calloc(1, sizeof(struct wlr_backend_state));
+	if (!state) {
+		wlr_log(L_ERROR, "Backend allocation failed");
+		return NULL;
+	}
+	state->backends = list_create();
+	if (!state->backends) {
+		free(state);
+		wlr_log(L_ERROR, "Backend allocation failed");
+		return NULL;
+	}
+	struct wlr_backend *backend = wlr_backend_create(&backend_impl, state);
+	state->backend = backend;
+	return backend;
+}
+
+static void input_add_reemit(struct wl_listener *listener, void *data) {
+	struct subbackend_state *state = wl_container_of(listener,
+			state, input_add);
+	wl_signal_emit(&state->container->events.input_add, data);
+}
+
+static void input_remove_reemit(struct wl_listener *listener, void *data) {
+	struct subbackend_state *state = wl_container_of(listener,
+			state, input_remove);
+	wl_signal_emit(&state->container->events.input_remove, data);
+}
+
+static void output_add_reemit(struct wl_listener *listener, void *data) {
+	struct subbackend_state *state = wl_container_of(listener,
+			state, output_add);
+	wl_signal_emit(&state->container->events.output_add, data);
+}
+
+static void output_remove_reemit(struct wl_listener *listener, void *data) {
+	struct subbackend_state *state = wl_container_of(listener,
+			state, output_remove);
+	wl_signal_emit(&state->container->events.output_remove, data);
+}
+
+void wlr_multi_backend_add(struct wlr_backend *multi,
+		struct wlr_backend *backend) {
+	struct subbackend_state *sub = calloc(1, sizeof(struct subbackend_state));
+	sub->backend = backend;
+	sub->container = multi;
+
+	sub->input_add.notify = input_add_reemit;
+	sub->input_remove.notify = input_remove_reemit;
+	sub->output_add.notify = output_add_reemit;
+	sub->output_remove.notify = output_remove_reemit;
+
+	wl_list_init(&sub->input_add.link);
+	wl_list_init(&sub->input_remove.link);
+	wl_list_init(&sub->output_add.link);
+	wl_list_init(&sub->output_remove.link);
+
+	wl_signal_add(&backend->events.input_add, &sub->input_add);
+	wl_signal_add(&backend->events.input_remove, &sub->input_remove);
+	wl_signal_add(&backend->events.output_add, &sub->output_add);
+	wl_signal_add(&backend->events.output_remove, &sub->output_remove);
+
+	list_add(multi->state->backends, sub);
+}