11 files changed, 725 insertions, 0 deletions

diff --git a/include/backend/drm/drm.h b/include/backend/drm/drm.h
new file mode 100644
index 00000000..de5212d3
--- /dev/null
+++ b/include/backend/drm/drm.h
@@ -0,0 +1,162 @@
+#ifndef BACKEND_DRM_DRM_H
+#define BACKEND_DRM_DRM_H
+
+#include <EGL/egl.h>
+#include <gbm.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <time.h>
+#include <wayland-server.h>
+#include <wayland-util.h>
+#include <wlr/backend/drm.h>
+#include <wlr/backend/session.h>
+#include <wlr/render/egl.h>
+#include <xf86drmMode.h>
+#include "iface.h"
+#include "properties.h"
+#include "renderer.h"
+
+struct wlr_drm_plane {
+	uint32_t type;
+	uint32_t id;
+
+	uint32_t possible_crtcs;
+
+	struct wlr_drm_surface surf;
+	struct wlr_drm_surface mgpu_surf;
+
+	// Only used by cursor
+	float matrix[9];
+	struct gbm_bo *cursor_bo;
+	bool cursor_enabled;
+	int32_t cursor_hotspot_x, cursor_hotspot_y;
+
+	union wlr_drm_plane_props props;
+};
+
+struct wlr_drm_crtc {
+	uint32_t id;
+
+	// Atomic modesetting only
+	uint32_t mode_id;
+	uint32_t gamma_lut;
+	drmModeAtomicReq *atomic;
+
+	// Legacy only
+	drmModeCrtc *legacy_crtc;
+
+	union {
+		struct {
+			struct wlr_drm_plane *overlay;
+			struct wlr_drm_plane *primary;
+			struct wlr_drm_plane *cursor;
+		};
+		struct wlr_drm_plane *planes[3];
+	};
+
+	union wlr_drm_crtc_props props;
+
+	struct wl_list connectors;
+
+	uint16_t *gamma_table;
+	size_t gamma_table_size;
+};
+
+struct wlr_drm_backend {
+	struct wlr_backend backend;
+
+	struct wlr_drm_backend *parent;
+	const struct wlr_drm_interface *iface;
+	clockid_t clock;
+
+	int fd;
+
+	size_t num_crtcs;
+	struct wlr_drm_crtc *crtcs;
+	size_t num_planes;
+	struct wlr_drm_plane *planes;
+
+	union {
+		struct {
+			size_t num_overlay_planes;
+			size_t num_primary_planes;
+			size_t num_cursor_planes;
+		};
+		size_t num_type_planes[3];
+	};
+
+	union {
+		struct {
+			struct wlr_drm_plane *overlay_planes;
+			struct wlr_drm_plane *primary_planes;
+			struct wlr_drm_plane *cursor_planes;
+		};
+		struct wlr_drm_plane *type_planes[3];
+	};
+
+	struct wl_display *display;
+	struct wl_event_source *drm_event;
+
+	struct wl_listener display_destroy;
+	struct wl_listener session_signal;
+	struct wl_listener drm_invalidated;
+
+	struct wl_list outputs;
+
+	struct wlr_drm_renderer renderer;
+	struct wlr_session *session;
+};
+
+enum wlr_drm_connector_state {
+	// Connector is available but no output is plugged in
+	WLR_DRM_CONN_DISCONNECTED,
+	// An output just has been plugged in and is waiting for a modeset
+	WLR_DRM_CONN_NEEDS_MODESET,
+	WLR_DRM_CONN_CLEANUP,
+	WLR_DRM_CONN_CONNECTED,
+	// Connector disappeared, waiting for being destroyed on next page-flip
+	WLR_DRM_CONN_DISAPPEARED,
+};
+
+struct wlr_drm_mode {
+	struct wlr_output_mode wlr_mode;
+	drmModeModeInfo drm_mode;
+};
+
+struct wlr_drm_connector {
+	struct wlr_output output;
+
+	enum wlr_drm_connector_state state;
+	struct wlr_output_mode *desired_mode;
+	bool desired_enabled;
+	uint32_t id;
+
+	struct wlr_drm_crtc *crtc;
+	uint32_t possible_crtc;
+
+	union wlr_drm_connector_props props;
+
+	uint32_t width, height;
+	int32_t cursor_x, cursor_y;
+
+	drmModeCrtc *old_crtc;
+
+	bool pageflip_pending;
+	struct wl_event_source *retry_pageflip;
+	struct wl_list link;
+};
+
+struct wlr_drm_backend *get_drm_backend_from_backend(
+	struct wlr_backend *wlr_backend);
+bool check_drm_features(struct wlr_drm_backend *drm);
+bool init_drm_resources(struct wlr_drm_backend *drm);
+void finish_drm_resources(struct wlr_drm_backend *drm);
+void restore_drm_outputs(struct wlr_drm_backend *drm);
+void scan_drm_connectors(struct wlr_drm_backend *state);
+int handle_drm_event(int fd, uint32_t mask, void *data);
+bool enable_drm_connector(struct wlr_output *output, bool enable);
+bool set_drm_connector_gamma(struct wlr_output *output, size_t size,
+	const uint16_t *r, const uint16_t *g, const uint16_t *b);
+
+#endif
diff --git a/include/backend/drm/iface.h b/include/backend/drm/iface.h
new file mode 100644
index 00000000..5308b136
--- /dev/null
+++ b/include/backend/drm/iface.h
@@ -0,0 +1,41 @@
+#ifndef BACKEND_DRM_IFACE_H
+#define BACKEND_DRM_IFACE_H
+
+#include <gbm.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+struct wlr_drm_backend;
+struct wlr_drm_connector;
+struct wlr_drm_crtc;
+
+// Used to provide atomic or legacy DRM functions
+struct wlr_drm_interface {
+	// Enable or disable DPMS for connector
+	bool (*conn_enable)(struct wlr_drm_backend *drm,
+		struct wlr_drm_connector *conn, bool enable);
+	// Pageflip on crtc. If mode is non-NULL perform a full modeset using it.
+	bool (*crtc_pageflip)(struct wlr_drm_backend *drm,
+		struct wlr_drm_connector *conn, struct wlr_drm_crtc *crtc,
+		uint32_t fb_id, drmModeModeInfo *mode);
+	// Enable the cursor buffer on crtc. Set bo to NULL to disable
+	bool (*crtc_set_cursor)(struct wlr_drm_backend *drm,
+		struct wlr_drm_crtc *crtc, struct gbm_bo *bo);
+	// Move the cursor on crtc
+	bool (*crtc_move_cursor)(struct wlr_drm_backend *drm,
+		struct wlr_drm_crtc *crtc, int x, int y);
+	// Set the gamma lut on crtc
+	bool (*crtc_set_gamma)(struct wlr_drm_backend *drm,
+		struct wlr_drm_crtc *crtc, size_t size,
+		uint16_t *r, uint16_t *g, uint16_t *b);
+	// Get the gamma lut size of a crtc
+	size_t (*crtc_get_gamma_size)(struct wlr_drm_backend *drm,
+		struct wlr_drm_crtc *crtc);
+};
+
+extern const struct wlr_drm_interface atomic_iface;
+extern const struct wlr_drm_interface legacy_iface;
+
+#endif
diff --git a/include/backend/drm/properties.h b/include/backend/drm/properties.h
new file mode 100644
index 00000000..b4d43bdd
--- /dev/null
+++ b/include/backend/drm/properties.h
@@ -0,0 +1,72 @@
+#ifndef BACKEND_DRM_PROPERTIES_H
+#define BACKEND_DRM_PROPERTIES_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+/*
+ * These types contain the property ids for several DRM objects.
+ * See https://01.org/linuxgraphics/gfx-docs/drm/gpu/drm-kms.html#kms-properties
+ * for more details.
+ */
+
+union wlr_drm_connector_props {
+	struct {
+		uint32_t edid;
+		uint32_t dpms;
+		uint32_t link_status; // not guaranteed to exist
+		uint32_t path;
+
+		// atomic-modesetting only
+
+		uint32_t crtc_id;
+	};
+	uint32_t props[4];
+};
+
+union wlr_drm_crtc_props {
+	struct {
+		// Neither of these are guaranteed to exist
+		uint32_t rotation;
+		uint32_t scaling_mode;
+
+		// atomic-modesetting only
+
+		uint32_t active;
+		uint32_t mode_id;
+		uint32_t gamma_lut;
+		uint32_t gamma_lut_size;
+	};
+	uint32_t props[6];
+};
+
+union wlr_drm_plane_props {
+	struct {
+		uint32_t type;
+		uint32_t rotation; // Not guaranteed to exist
+
+		// atomic-modesetting only
+
+		uint32_t src_x;
+		uint32_t src_y;
+		uint32_t src_w;
+		uint32_t src_h;
+		uint32_t crtc_x;
+		uint32_t crtc_y;
+		uint32_t crtc_w;
+		uint32_t crtc_h;
+		uint32_t fb_id;
+		uint32_t crtc_id;
+	};
+	uint32_t props[12];
+};
+
+bool get_drm_connector_props(int fd, uint32_t id,
+	union wlr_drm_connector_props *out);
+bool get_drm_crtc_props(int fd, uint32_t id, union wlr_drm_crtc_props *out);
+bool get_drm_plane_props(int fd, uint32_t id, union wlr_drm_plane_props *out);
+
+bool get_drm_prop(int fd, uint32_t obj, uint32_t prop, uint64_t *ret);
+void *get_drm_prop_blob(int fd, uint32_t obj, uint32_t prop, size_t *ret_len);
+
+#endif
diff --git a/include/backend/drm/renderer.h b/include/backend/drm/renderer.h
new file mode 100644
index 00000000..575758de
--- /dev/null
+++ b/include/backend/drm/renderer.h
@@ -0,0 +1,57 @@
+#ifndef BACKEND_DRM_RENDERER_H
+#define BACKEND_DRM_RENDERER_H
+
+#include <EGL/egl.h>
+#include <gbm.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <wlr/backend.h>
+#include <wlr/render/wlr_renderer.h>
+
+struct wlr_drm_backend;
+struct wlr_drm_plane;
+
+struct wlr_drm_renderer {
+	int fd;
+	struct gbm_device *gbm;
+	struct wlr_egl egl;
+
+	struct wlr_renderer *wlr_rend;
+};
+
+struct wlr_drm_surface {
+	struct wlr_drm_renderer *renderer;
+
+	uint32_t width;
+	uint32_t height;
+
+	struct gbm_surface *gbm;
+	EGLSurface egl;
+
+	struct gbm_bo *front;
+	struct gbm_bo *back;
+};
+
+bool init_drm_renderer(struct wlr_drm_backend *drm,
+	struct wlr_drm_renderer *renderer, wlr_renderer_create_func_t create_render);
+void finish_drm_renderer(struct wlr_drm_renderer *renderer);
+
+bool init_drm_surface(struct wlr_drm_surface *surf,
+	struct wlr_drm_renderer *renderer, uint32_t width, uint32_t height,
+	uint32_t format, uint32_t flags);
+
+bool init_drm_plane_surfaces(struct wlr_drm_plane *plane,
+	struct wlr_drm_backend *drm, int32_t width, uint32_t height,
+	uint32_t format);
+
+void finish_drm_surface(struct wlr_drm_surface *surf);
+bool make_drm_surface_current(struct wlr_drm_surface *surf, int *buffer_age);
+struct gbm_bo *swap_drm_surface_buffers(struct wlr_drm_surface *surf,
+	pixman_region32_t *damage);
+struct gbm_bo *get_drm_surface_front(struct wlr_drm_surface *surf);
+void post_drm_surface(struct wlr_drm_surface *surf);
+struct gbm_bo *copy_drm_surface_mgpu(struct wlr_drm_surface *dest,
+	struct gbm_bo *src);
+bool export_drm_bo(struct gbm_bo *bo, struct wlr_dmabuf_attributes *attribs);
+
+#endif
diff --git a/include/backend/drm/util.h b/include/backend/drm/util.h
new file mode 100644
index 00000000..e159d716
--- /dev/null
+++ b/include/backend/drm/util.h
@@ -0,0 +1,41 @@
+#ifndef BACKEND_DRM_UTIL_H
+#define BACKEND_DRM_UTIL_H
+
+#include <stdint.h>
+#include <wlr/types/wlr_output.h>
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+// Calculates a more accurate refresh rate (mHz) than what mode itself provides
+int32_t calculate_refresh_rate(const drmModeModeInfo *mode);
+// Populates the make/model/phys_{width,height} of output from the edid data
+void parse_edid(struct wlr_output *restrict output, size_t len,
+	const uint8_t *data);
+// Returns the string representation of a DRM output type
+const char *conn_get_name(uint32_t type_id);
+// Returns the DRM framebuffer id for a gbm_bo
+uint32_t get_fb_for_bo(struct gbm_bo *bo);
+
+// Part of match_obj
+enum {
+	UNMATCHED = (uint32_t)-1,
+	SKIP = (uint32_t)-2,
+};
+
+/*
+ * Tries to match some DRM objects with some other DRM resource.
+ * e.g. Match CRTCs with Encoders, CRTCs with Planes.
+ *
+ * objs contains a bit array which resources it can be matched with.
+ * e.g. Bit 0 set means can be matched with res[0]
+ *
+ * res contains an index of which objs it is matched with or UNMATCHED.
+ *
+ * This solution is left in out.
+ * Returns the total number of matched solutions.
+ */
+size_t match_obj(size_t num_objs, const uint32_t objs[static restrict num_objs],
+		size_t num_res, const uint32_t res[static restrict num_res],
+		uint32_t out[static restrict num_res]);
+
+#endif
diff --git a/include/backend/headless.h b/include/backend/headless.h
new file mode 100644
index 00000000..35280862
--- /dev/null
+++ b/include/backend/headless.h
@@ -0,0 +1,40 @@
+#ifndef BACKEND_HEADLESS_H
+#define BACKEND_HEADLESS_H
+
+#include <wlr/backend/headless.h>
+#include <wlr/backend/interface.h>
+
+#define HEADLESS_DEFAULT_REFRESH (60 * 1000) // 60 Hz
+
+struct wlr_headless_backend {
+	struct wlr_backend backend;
+	struct wlr_egl egl;
+	struct wlr_renderer *renderer;
+	struct wl_display *display;
+	struct wl_list outputs;
+	struct wl_list input_devices;
+	struct wl_listener display_destroy;
+	bool started;
+};
+
+struct wlr_headless_output {
+	struct wlr_output wlr_output;
+
+	struct wlr_headless_backend *backend;
+	struct wl_list link;
+
+	void *egl_surface;
+	struct wl_event_source *frame_timer;
+	int frame_delay; // ms
+};
+
+struct wlr_headless_input_device {
+	struct wlr_input_device wlr_input_device;
+
+	struct wlr_headless_backend *backend;
+};
+
+struct wlr_headless_backend *headless_backend_from_backend(
+	struct wlr_backend *wlr_backend);
+
+#endif
diff --git a/include/backend/libinput.h b/include/backend/libinput.h
new file mode 100644
index 00000000..f4886956
--- /dev/null
+++ b/include/backend/libinput.h
@@ -0,0 +1,94 @@
+#ifndef BACKEND_LIBINPUT_H
+#define BACKEND_LIBINPUT_H
+
+#include <libinput.h>
+#include <wayland-server-core.h>
+#include <wlr/backend/interface.h>
+#include <wlr/backend/libinput.h>
+#include <wlr/interfaces/wlr_input_device.h>
+#include <wlr/types/wlr_input_device.h>
+#include <wlr/types/wlr_list.h>
+
+struct wlr_libinput_backend {
+	struct wlr_backend backend;
+
+	struct wlr_session *session;
+	struct wl_display *display;
+
+	struct libinput *libinput_context;
+	struct wl_event_source *input_event;
+
+	struct wl_listener display_destroy;
+	struct wl_listener session_signal;
+
+	struct wlr_list wlr_device_lists; // list of struct wl_list
+};
+
+struct wlr_libinput_input_device {
+	struct wlr_input_device wlr_input_device;
+
+	struct libinput_device *handle;
+};
+
+uint32_t usec_to_msec(uint64_t usec);
+
+void handle_libinput_event(struct wlr_libinput_backend *state,
+		struct libinput_event *event);
+
+struct wlr_input_device *get_appropriate_device(
+		enum wlr_input_device_type desired_type,
+		struct libinput_device *device);
+
+struct wlr_keyboard *create_libinput_keyboard(
+		struct libinput_device *device);
+void handle_keyboard_key(struct libinput_event *event,
+		struct libinput_device *device);
+
+struct wlr_pointer *create_libinput_pointer(
+		struct libinput_device *device);
+void handle_pointer_motion(struct libinput_event *event,
+		struct libinput_device *device);
+void handle_pointer_motion_abs(struct libinput_event *event,
+		struct libinput_device *device);
+void handle_pointer_button(struct libinput_event *event,
+		struct libinput_device *device);
+void handle_pointer_axis(struct libinput_event *event,
+		struct libinput_device *device);
+
+struct wlr_switch *create_libinput_switch(
+		struct libinput_device *device);
+void handle_switch_toggle(struct libinput_event *event,
+		struct libinput_device *device);
+
+struct wlr_touch *create_libinput_touch(
+		struct libinput_device *device);
+void handle_touch_down(struct libinput_event *event,
+		struct libinput_device *device);
+void handle_touch_up(struct libinput_event *event,
+		struct libinput_device *device);
+void handle_touch_motion(struct libinput_event *event,
+		struct libinput_device *device);
+void handle_touch_cancel(struct libinput_event *event,
+		struct libinput_device *device);
+
+struct wlr_tablet *create_libinput_tablet(
+		struct libinput_device *device);
+void handle_tablet_tool_axis(struct libinput_event *event,
+		struct libinput_device *device);
+void handle_tablet_tool_proximity(struct libinput_event *event,
+		struct libinput_device *device);
+void handle_tablet_tool_tip(struct libinput_event *event,
+		struct libinput_device *device);
+void handle_tablet_tool_button(struct libinput_event *event,
+		struct libinput_device *device);
+
+struct wlr_tablet_pad *create_libinput_tablet_pad(
+		struct libinput_device *device);
+void handle_tablet_pad_button(struct libinput_event *event,
+		struct libinput_device *device);
+void handle_tablet_pad_ring(struct libinput_event *event,
+		struct libinput_device *device);
+void handle_tablet_pad_strip(struct libinput_event *event,
+		struct libinput_device *device);
+
+#endif
diff --git a/include/backend/multi.h b/include/backend/multi.h
new file mode 100644
index 00000000..2f5f1bd4
--- /dev/null
+++ b/include/backend/multi.h
@@ -0,0 +1,23 @@
+#ifndef BACKEND_MULTI_H
+#define BACKEND_MULTI_H
+
+#include <wayland-util.h>
+#include <wlr/backend/interface.h>
+#include <wlr/backend/multi.h>
+#include <wlr/backend/session.h>
+
+struct wlr_multi_backend {
+	struct wlr_backend backend;
+	struct wlr_session *session;
+
+	struct wl_list backends;
+
+	struct wl_listener display_destroy;
+
+	struct {
+		struct wl_signal backend_add;
+		struct wl_signal backend_remove;
+	} events;
+};
+
+#endif
diff --git a/include/backend/session/direct-ipc.h b/include/backend/session/direct-ipc.h
new file mode 100644
index 00000000..c660b58f
--- /dev/null
+++ b/include/backend/session/direct-ipc.h
@@ -0,0 +1,12 @@
+#ifndef BACKEND_SESSION_DIRECT_IPC_H
+#define BACKEND_SESSION_DIRECT_IPC_H
+
+#include <sys/types.h>
+
+int direct_ipc_open(int sock, const char *path);
+void direct_ipc_setmaster(int sock, int fd);
+void direct_ipc_dropmaster(int sock, int fd);
+void direct_ipc_finish(int sock, pid_t pid);
+int direct_ipc_init(pid_t *pid_out);
+
+#endif
diff --git a/include/backend/wayland.h b/include/backend/wayland.h
new file mode 100644
index 00000000..dbc309ca
--- /dev/null
+++ b/include/backend/wayland.h
@@ -0,0 +1,92 @@
+#ifndef BACKEND_WAYLAND_H
+#define BACKEND_WAYLAND_H
+
+#include <stdbool.h>
+
+#include <wayland-client.h>
+#include <wayland-egl.h>
+#include <wayland-server.h>
+#include <wayland-util.h>
+
+#include <wlr/backend/wayland.h>
+#include <wlr/render/egl.h>
+#include <wlr/render/wlr_renderer.h>
+#include <wlr/types/wlr_box.h>
+
+struct wlr_wl_backend {
+	struct wlr_backend backend;
+
+	/* local state */
+	bool started;
+	struct wl_display *local_display;
+	struct wl_list devices;
+	struct wl_list outputs;
+	struct wlr_egl egl;
+	struct wlr_renderer *renderer;
+	size_t requested_outputs;
+	struct wl_listener local_display_destroy;
+	/* remote state */
+	struct wl_display *remote_display;
+	struct wl_event_source *remote_display_src;
+	struct wl_registry *registry;
+	struct wl_compositor *compositor;
+	struct zxdg_shell_v6 *shell;
+	struct wl_shm *shm;
+	struct wl_seat *seat;
+	struct wl_pointer *pointer;
+	struct wl_keyboard *keyboard;
+	struct wlr_wl_pointer *current_pointer;
+	char *seat_name;
+};
+
+struct wlr_wl_output {
+	struct wlr_output wlr_output;
+
+	struct wlr_wl_backend *backend;
+	struct wl_list link;
+
+	struct wl_surface *surface;
+	struct wl_callback *frame_callback;
+	struct zxdg_surface_v6 *xdg_surface;
+	struct zxdg_toplevel_v6 *xdg_toplevel;
+	struct wl_egl_window *egl_window;
+	EGLSurface egl_surface;
+
+	uint32_t enter_serial;
+
+	struct {
+		struct wl_surface *surface;
+		struct wl_egl_window *egl_window;
+		int32_t hotspot_x, hotspot_y;
+		int32_t width, height;
+	} cursor;
+};
+
+struct wlr_wl_input_device {
+	struct wlr_input_device wlr_input_device;
+
+	struct wlr_wl_backend *backend;
+	void *resource;
+};
+
+struct wlr_wl_pointer {
+	struct wlr_pointer wlr_pointer;
+
+	struct wlr_wl_input_device *input_device;
+	struct wl_pointer *wl_pointer;
+	enum wlr_axis_source axis_source;
+	int32_t axis_discrete;
+	struct wlr_wl_output *output;
+
+	struct wl_listener output_destroy;
+};
+
+struct wlr_wl_backend *get_wl_backend_from_backend(struct wlr_backend *backend);
+void update_wl_output_cursor(struct wlr_wl_output *output);
+struct wlr_wl_pointer *pointer_get_wl(struct wlr_pointer *wlr_pointer);
+void create_wl_pointer(struct wl_pointer *wl_pointer, struct wlr_wl_output *output);
+void create_wl_keyboard(struct wl_keyboard *wl_keyboard, struct wlr_wl_backend *wl);
+
+extern const struct wl_seat_listener seat_listener;
+
+#endif
diff --git a/include/backend/x11.h b/include/backend/x11.h
new file mode 100644
index 00000000..1a8341f6
--- /dev/null
+++ b/include/backend/x11.h
@@ -0,0 +1,91 @@
+#ifndef BACKEND_X11_H
+#define BACKEND_X11_H
+
+#include <stdbool.h>
+
+#include <X11/Xlib-xcb.h>
+#include <wayland-server.h>
+#include <xcb/xcb.h>
+
+#include <wlr/backend/x11.h>
+#include <wlr/config.h>
+#include <wlr/interfaces/wlr_input_device.h>
+#include <wlr/interfaces/wlr_output.h>
+#include <wlr/render/egl.h>
+#include <wlr/render/wlr_renderer.h>
+
+#define XCB_EVENT_RESPONSE_TYPE_MASK 0x7f
+
+#define X11_DEFAULT_REFRESH (60 * 1000) // 60 Hz
+
+struct wlr_x11_backend;
+
+struct wlr_x11_output {
+	struct wlr_output wlr_output;
+	struct wlr_x11_backend *x11;
+	struct wl_list link; // wlr_x11_backend::outputs
+
+	xcb_window_t win;
+	EGLSurface surf;
+
+	struct wlr_pointer pointer;
+	struct wlr_input_device pointer_dev;
+
+	struct wl_event_source *frame_timer;
+	int frame_delay;
+
+	bool cursor_hidden;
+};
+
+struct wlr_x11_backend {
+	struct wlr_backend backend;
+	struct wl_display *wl_display;
+	bool started;
+
+	Display *xlib_conn;
+	xcb_connection_t *xcb;
+	xcb_screen_t *screen;
+
+	size_t requested_outputs;
+	struct wl_list outputs; // wlr_x11_output::link
+
+	struct wlr_keyboard keyboard;
+	struct wlr_input_device keyboard_dev;
+
+	struct wlr_egl egl;
+	struct wlr_renderer *renderer;
+	struct wl_event_source *event_source;
+
+	struct {
+		xcb_atom_t wm_protocols;
+		xcb_atom_t wm_delete_window;
+		xcb_atom_t net_wm_name;
+		xcb_atom_t utf8_string;
+	} atoms;
+
+	// The time we last received an event
+	xcb_timestamp_t time;
+
+	uint8_t xinput_opcode;
+
+	struct wl_listener display_destroy;
+};
+
+struct wlr_x11_backend *get_x11_backend_from_backend(
+	struct wlr_backend *wlr_backend);
+struct wlr_x11_output *get_x11_output_from_window_id(
+	struct wlr_x11_backend *x11, xcb_window_t window);
+
+extern const struct wlr_keyboard_impl keyboard_impl;
+extern const struct wlr_pointer_impl pointer_impl;
+extern const struct wlr_input_device_impl input_device_impl;
+
+void handle_x11_xinput_event(struct wlr_x11_backend *x11,
+		xcb_ge_generic_event_t *event);
+void update_x11_pointer_position(struct wlr_x11_output *output,
+	xcb_timestamp_t time);
+
+void handle_x11_configure_notify(struct wlr_x11_output *output,
+	xcb_configure_notify_event_t *event);
+
+#endif