Merge branch 'libinput' into wayland-backend

CMake/FindXKBCommon.cmake

@@ -0,0 +1,19 @@
+# - Find XKBCommon
+# Once done, this will define
+#
+#   XKBCOMMON_FOUND - System has XKBCommon
+#   XKBCOMMON_INCLUDE_DIRS - The XKBCommon include directories
+#   XKBCOMMON_LIBRARIES - The libraries needed to use XKBCommon
+#   XKBCOMMON_DEFINITIONS - Compiler switches required for using XKBCommon
+
+find_package(PkgConfig)
+pkg_check_modules(PC_XKBCOMMON QUIET xkbcommon)
+find_path(XKBCOMMON_INCLUDE_DIRS NAMES xkbcommon/xkbcommon.h HINTS ${PC_XKBCOMMON_INCLUDE_DIRS})
+find_library(XKBCOMMON_LIBRARIES NAMES xkbcommon HINTS ${PC_XKBCOMMON_LIBRARY_DIRS})
+
+set(XKBCOMMON_DEFINITIONS ${PC_XKBCOMMON_CFLAGS_OTHER})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(XKBCOMMON DEFAULT_MSG XKBCOMMON_LIBRARIES XKBCOMMON_INCLUDE_DIRS)
+mark_as_advanced(XKBCOMMON_LIBRARIES XKBCOMMON_INCLUDE_DIRS)
+

CMakeLists.txt

@@ -2,9 +2,6 @@ cmake_minimum_required(VERSION 3.1.0)
 
 project(wlroots C)
 
-if (CMAKE_BUILD_TYPE EQUAL "Debug")
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g")
-endif()
 set(CMAKE_C_STANDARD 99)
 set(CMAKE_C_EXTENSIONS OFF)
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
@@ -51,6 +48,7 @@ find_package(GLESv2 REQUIRED)
 find_package(DRM REQUIRED)
 find_package(GBM REQUIRED)
 find_package(LibInput REQUIRED)
+find_package(XKBCommon REQUIRED)
 find_package(Udev REQUIRED)
 find_package(Systemd)
 

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
@@ -11,9 +12,18 @@ add_library(wlr-backend
     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
+
+    multi/backend.c
     backend.c
     egl.c
+    udev.c
 )
 
 target_link_libraries(wlr-backend
@@ -26,5 +36,6 @@ target_link_libraries(wlr-backend
     ${EGL_LIBRARIES}
     ${SYSTEMD_LIBRARIES}
     ${UDEV_LIBRARIES}
+    ${LIBINPUT_LIBRARIES}
     ${GBM_LIBRARIES}
 )

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;
+	struct wlr_backend *multi = wlr_multi_backend_create();
-	wlr = wlr_drm_backend_create(display, session, udev, gpu);
+	if (!multi) {
-	if (!wlr) {
 		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;
+}

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[1] = output->bo[0];
-	output->bo_current = bo;
+	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[1] = NULL;
-	output->bo_current = bo;
+	output->bo[0] = bo;
 }
 
 static bool display_init_renderer(struct wlr_drm_renderer *renderer,
@@ -280,6 +280,59 @@ 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;
+		}
+	}
+}
+
+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 +342,8 @@ 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 +512,29 @@ 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 +597,9 @@ 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) {
+	if (output->bo[1]) {
-		gbm_surface_release_buffer(output->gbm, output->bo_last);
+		gbm_surface_release_buffer(output->gbm, output->bo[1]);
-		output->bo_last = NULL;
+		output->bo[1] = NULL;
 	}
 
 	output->pageflip_pending = false;

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;
+}

backend/libinput/events.c

@@ -0,0 +1,176 @@
+#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)) {
+		// TODO
+	}
+	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;
+	default:
+		wlr_log(L_DEBUG, "Unknown libinput event %d", event_type);
+		break;
+	}
+}

backend/libinput/keyboard.c

@@ -0,0 +1,44 @@
+#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 *wlr_libinput_keyboard_create(
+		struct libinput_device *device) {
+	assert(device);
+	libinput_device_led_update(device, 0);
+	return wlr_keyboard_create(NULL, NULL);
+}
+
+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);
+}

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);
+	}
+}

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);
+}

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);
+}

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);
+}

example/CMakeLists.txt

@@ -1,19 +1,23 @@
 include_directories(
 	${DRM_INCLUDE_DIRS}
     ${CMAKE_CURRENT_SOURCE_DIR}
+    ${XKBCOMMON_INCLUDE_DIRS}
 )
 
 add_executable(simple
     simple.c
+    shared.c
 )
 
 target_link_libraries(simple
     wlr-backend
     wlr-session
+    ${XKBCOMMON_LIBRARIES}
 )
 
 add_executable(rotation
     rotation.c
+    shared.c
     cat.c
 )
 
@@ -21,4 +25,43 @@ target_link_libraries(rotation
     wlr-backend
     wlr-session
     wlr-render
+    ${XKBCOMMON_LIBRARIES}
+)
+
+add_executable(pointer
+    pointer.c
+    shared.c
+    cat.c
+)
+
+target_link_libraries(pointer
+    wlr-backend
+    wlr-session
+    wlr-render
+    ${XKBCOMMON_LIBRARIES}
+)
+
+add_executable(touch
+    touch.c
+    shared.c
+    cat.c
+)
+
+target_link_libraries(touch
+    wlr-backend
+    wlr-session
+    wlr-render
+    ${XKBCOMMON_LIBRARIES}
+)
+
+add_executable(tablet
+    tablet.c
+    shared.c
+)
+
+target_link_libraries(tablet
+    wlr-backend
+    wlr-session
+    wlr-render
+    ${XKBCOMMON_LIBRARIES}
 )

example/pointer.c

@@ -0,0 +1,132 @@
+#define _POSIX_C_SOURCE 199309L
+#define _XOPEN_SOURCE 500
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <string.h>
+#include <unistd.h>
+#include <wayland-server.h>
+#include <wayland-server-protocol.h>
+#include <xkbcommon/xkbcommon.h>
+#include <GLES3/gl3.h>
+#include <wlr/render/matrix.h>
+#include <wlr/render/gles3.h>
+#include <wlr/render.h>
+#include <wlr/backend.h>
+#include <wlr/session.h>
+#include <wlr/types.h>
+#include <math.h>
+#include "shared.h"
+#include "cat.h"
+
+struct sample_state {
+	struct wlr_renderer *renderer;
+	struct wlr_surface *cat_texture;
+	int cur_x, cur_y;
+	float default_color[4];
+	float clear_color[4];
+};
+
+static void handle_output_frame(struct output_state *output, struct timespec *ts) {
+	struct compositor_state *state = output->compositor;
+	struct sample_state *sample = state->data;
+	struct wlr_output *wlr_output = output->output;
+
+	wlr_renderer_begin(sample->renderer, wlr_output);
+	glClearColor(sample->clear_color[0], sample->clear_color[1],
+			sample->clear_color[2], sample->clear_color[3]);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	float matrix[16];
+	wlr_surface_get_matrix(sample->cat_texture, &matrix,
+		&wlr_output->transform_matrix, sample->cur_x, sample->cur_y);
+	wlr_render_with_matrix(sample->renderer,
+			sample->cat_texture, &matrix);
+
+	wlr_renderer_end(sample->renderer);
+}
+
+static void handle_keyboard_key(struct keyboard_state *kbstate,
+		xkb_keysym_t sym, enum wlr_key_state key_state) {
+	if (sym == XKB_KEY_Escape) {
+		kbstate->compositor->exit = true;
+	}
+}
+
+static void handle_pointer_motion(struct pointer_state *pstate,
+		double d_x, double d_y) {
+	struct sample_state *state = pstate->compositor->data;
+	state->cur_x += d_x;
+	state->cur_y += d_y;
+}
+
+static void handle_pointer_button(struct pointer_state *pstate,
+		uint32_t button, enum wlr_button_state state) {
+	struct sample_state *sample = pstate->compositor->data;
+	float (*color)[4];
+	if (state == WLR_BUTTON_RELEASED) {
+		color = &sample->default_color;
+	} else {
+		float red[4] = { 0.25f, 0.25f, 0.25f, 1 };
+		red[button % 3] = 1;
+		color = &red;
+	}
+	memcpy(&sample->clear_color, color, sizeof(*color));
+}
+
+static void handle_pointer_axis(struct pointer_state *pstate,
+	enum wlr_axis_source source,
+	enum wlr_axis_orientation orientation,
+	double delta) {
+	struct sample_state *sample = pstate->compositor->data;
+	for (size_t i = 0; i < 3; ++i) {
+		sample->default_color[i] += delta > 0 ? -0.05f : 0.05f;
+		if (sample->default_color[i] > 1.0f) {
+			sample->default_color[i] = 1.0f;
+		}
+		if (sample->default_color[i] < 0.0f) {
+			sample->default_color[i] = 0.0f;
+		}
+	}
+	memcpy(&sample->clear_color, &sample->default_color,
+			sizeof(sample->clear_color));
+}
+
+static void handle_output_add(struct output_state *ostate) {
+	struct wlr_output *wlr_output = ostate->output;
+	if (!wlr_output_set_cursor(wlr_output, cat_tex.pixel_data,
+			cat_tex.width * 4, cat_tex.width, cat_tex.height)) {
+		fprintf(stderr, "Failed to set cursor\n");
+		return;
+	}
+	if (!wlr_output_move_cursor(wlr_output, 0, 0)) {
+		fprintf(stderr, "Failed to move cursor\n");
+	}
+}
+
+int main(int argc, char *argv[]) {
+	struct sample_state state = {
+		.default_color = { 0.25f, 0.25f, 0.25f, 1 },
+		.clear_color = { 0.25f, 0.25f, 0.25f, 1 }
+	};
+	struct compositor_state compositor;
+
+	compositor_init(&compositor);
+	compositor.output_add_cb = handle_output_add;
+	compositor.output_frame_cb = handle_output_frame;
+	compositor.keyboard_key_cb = handle_keyboard_key;
+	compositor.pointer_motion_cb = handle_pointer_motion;
+	compositor.pointer_button_cb = handle_pointer_button;
+	compositor.pointer_axis_cb = handle_pointer_axis;
+
+	state.renderer = wlr_gles3_renderer_init();
+	state.cat_texture = wlr_render_surface_init(state.renderer);
+	wlr_surface_attach_pixels(state.cat_texture, GL_RGBA,
+		cat_tex.width, cat_tex.height, cat_tex.pixel_data);
+
+	compositor.data = &state;
+	compositor_run(&compositor);
+
+	wlr_surface_destroy(state.cat_texture);
+	wlr_renderer_destroy(state.renderer);
+}

example/rotation.c

@@ -7,6 +7,7 @@
 #include <unistd.h>
 #include <wayland-server.h>
 #include <wayland-server-protocol.h>
+#include <xkbcommon/xkbcommon.h>
 #include <GLES3/gl3.h>
 #include <wlr/render/matrix.h>
 #include <wlr/render/gles3.h>
@@ -15,24 +16,18 @@
 #include <wlr/session.h>
 #include <wlr/types.h>
 #include <math.h>
+#include "shared.h"
 #include "cat.h"
 
-struct state {
+struct sample_state {
-	struct wl_listener output_add;
-	struct wl_listener output_remove;
-	struct wl_list outputs;
 	struct wl_list config;
 	struct wlr_renderer *renderer;
 	struct wlr_surface *cat_texture;
 };
 
-struct output_state {
+struct output_data {
-	struct timespec last_frame;
-	struct wl_list link;
-	struct wlr_output *output;
-	struct state *state;
-	struct wl_listener frame;
 	float x_offs, y_offs;
+	float x_vel, y_vel;
 };
 
 struct output_config {
@@ -41,86 +36,93 @@ struct output_config {
 	struct wl_list link;
 };
 
-static void output_frame(struct wl_listener *listener, void *data) {
+static void handle_output_frame(struct output_state *output, struct timespec *ts) {
-	struct output_state *ostate = wl_container_of(listener, ostate, frame);
+	struct compositor_state *state = output->compositor;
-	struct wlr_output *output = ostate->output;
+	struct sample_state *sample = state->data;
-	struct state *s = ostate->state;
+	struct output_data *odata = output->data;
+	struct wlr_output *wlr_output = output->output;
 
 	int32_t width, height;
-	wlr_output_effective_resolution(output, &width, &height);
+	wlr_output_effective_resolution(wlr_output, &width, &height);
 
-	wlr_renderer_begin(s->renderer, output);
+	wlr_renderer_begin(sample->renderer, wlr_output);
 
 	float matrix[16];
-	for (int y = -128 + (int)ostate->y_offs; y < height; y += 128) {
+	for (int y = -128 + (int)odata->y_offs; y < height; y += 128) {
-		for (int x = -128 + (int)ostate->x_offs; x < width; x += 128) {
+		for (int x = -128 + (int)odata->x_offs; x < width; x += 128) {
-			wlr_surface_get_matrix(s->cat_texture, &matrix,
+			wlr_surface_get_matrix(sample->cat_texture, &matrix,
-				&output->transform_matrix, x, y);
+				&wlr_output->transform_matrix, x, y);
-			wlr_render_with_matrix(s->renderer, s->cat_texture, &matrix);
+			wlr_render_with_matrix(sample->renderer,
+					sample->cat_texture, &matrix);
 		}
 	}
 
-	wlr_renderer_end(s->renderer);
+	wlr_renderer_end(sample->renderer);
 
-	struct timespec now;
+	long ms = (ts->tv_sec - output->last_frame.tv_sec) * 1000 +
-	clock_gettime(CLOCK_MONOTONIC, &now);
+		(ts->tv_nsec - output->last_frame.tv_nsec) / 1000000;
-	long ms = (now.tv_sec - ostate->last_frame.tv_sec) * 1000 +
-		(now.tv_nsec - ostate->last_frame.tv_nsec) / 1000000;
 	float seconds = ms / 1000.0f;
 
-	ostate->x_offs += 128 * seconds;
+	odata->x_offs += odata->x_vel * seconds;
-	ostate->y_offs += 128 * seconds;
+	odata->y_offs += odata->y_vel * seconds;
-	if (ostate->x_offs > 128) ostate->x_offs = 0;
+	if (odata->x_offs > 128) odata->x_offs = 0;
-	if (ostate->y_offs > 128) ostate->y_offs = 0;
+	if (odata->y_offs > 128) odata->y_offs = 0;
-	ostate->last_frame = now;
 }
 
-static void output_add(struct wl_listener *listener, void *data) {
+static void handle_output_add(struct output_state *output) {
-	struct wlr_output *output = data;
+	struct output_data *odata = calloc(1, sizeof(struct output_data));
-	struct state *state = wl_container_of(listener, state, output_add);
+	odata->x_offs = odata->y_offs = 0;
-
+	odata->x_vel = odata->y_vel = 128;
-	fprintf(stderr, "Output '%s' added\n", output->name);
+	output->data = odata;
-	wlr_output_set_mode(output, output->modes->items[0]);
+	struct sample_state *state = output->compositor->data;
-
-	struct output_state *ostate = calloc(1, sizeof(struct output_state));
-
-	clock_gettime(CLOCK_MONOTONIC, &ostate->last_frame);
-	ostate->output = output;
-	ostate->state = state;
-	ostate->frame.notify = output_frame;
-	ostate->x_offs = ostate->y_offs = 0;
 
 	struct output_config *conf;
 	wl_list_for_each(conf, &state->config, link) {
-		if (strcmp(conf->name, output->name) == 0) {
+		if (strcmp(conf->name, output->output->name) == 0) {
-			wlr_output_transform(ostate->output, conf->transform);
+			wlr_output_transform(output->output, conf->transform);
-			break;
-		}
-	}
-
-	wl_list_init(&ostate->frame.link);
-	wl_signal_add(&output->events.frame, &ostate->frame);
-	wl_list_insert(&state->outputs, &ostate->link);
-}
-
-static void output_remove(struct wl_listener *listener, void *data) {
-	struct wlr_output *output = data;
-	struct state *state = wl_container_of(listener, state, output_remove);
-	struct output_state *ostate;
-
-	wl_list_for_each(ostate, &state->outputs, link) {
-		if (ostate->output == output) {
-			wl_list_remove(&ostate->link);
-			wl_list_remove(&ostate->frame.link);
-			free(ostate);
 			break;
 		}
 	}
 }
 
-static int timer_done(void *data) {
+static void handle_output_remove(struct output_state *output) {
-	*(bool *)data = true;
+	free(output->data);
-	return 1;
+}
+
+static void update_velocities(struct compositor_state *state,
+		float x_diff, float y_diff) {
+	struct output_state *output;
+	wl_list_for_each(output, &state->outputs, link) {
+		struct output_data *odata = output->data;
+		odata->x_vel += x_diff;
+		odata->y_vel += y_diff;
+	}
+}
+
+static void handle_keyboard_key(struct keyboard_state *kbstate,
+		xkb_keysym_t sym, enum wlr_key_state key_state) {
+	// NOTE: It may be better to simply refer to our key state during each frame
+	// and make this change in pixels/sec^2
+	// Also, key repeat
+	if (key_state == WLR_KEY_PRESSED) {
+		switch (sym) {
+		case XKB_KEY_Escape:
+			kbstate->compositor->exit = true;
+			break;
+		case XKB_KEY_Left:
+			update_velocities(kbstate->compositor, -16, 0);
+			break;
+		case XKB_KEY_Right:
+			update_velocities(kbstate->compositor, 16, 0);
+			break;
+		case XKB_KEY_Up:
+			update_velocities(kbstate->compositor, 0, -16);
+			break;
+		case XKB_KEY_Down:
+			update_velocities(kbstate->compositor, 0, 16);
+			break;
+		}
+	}
 }
 
 static void usage(const char *name, int ret) {
@@ -190,59 +192,27 @@ static void parse_args(int argc, char *argv[], struct wl_list *config) {
 }
 
 int main(int argc, char *argv[]) {
-	struct state state = {
+	struct sample_state state = { 0 };
-		.output_add = { .notify = output_add },
+	struct compositor_state compositor;
-		.output_remove = { .notify = output_remove }
-	};
-
-	wl_list_init(&state.outputs);
 	wl_list_init(&state.config);
-	wl_list_init(&state.output_add.link);
-	wl_list_init(&state.output_remove.link);
-
 	parse_args(argc, argv, &state.config);
 
-	struct wl_display *display = wl_display_create();
+	compositor_init(&compositor);
-	struct wl_event_loop *event_loop = wl_display_get_event_loop(display);
+	compositor.output_add_cb = handle_output_add;
-
+	compositor.output_remove_cb = handle_output_remove;
-	struct wlr_session *session = wlr_session_start(display);
+	compositor.output_frame_cb = handle_output_frame;
-	if (!session) {
+	compositor.keyboard_key_cb = handle_keyboard_key;
-		return 1;
-	}
-
-	struct wlr_backend *wlr = wlr_backend_autocreate(display, session);
-	if (!wlr) {
-		return 1;
-	}
-
-	wl_signal_add(&wlr->events.output_add, &state.output_add);
-	wl_signal_add(&wlr->events.output_remove, &state.output_remove);
-
-	if (!wlr_backend_init(wlr)) {
-		return 1;
-	}
 
 	state.renderer = wlr_gles3_renderer_init();
 	state.cat_texture = wlr_render_surface_init(state.renderer);
-	wlr_surface_attach_pixels(state.cat_texture, GL_RGB,
+	wlr_surface_attach_pixels(state.cat_texture, GL_RGBA,
 		cat_tex.width, cat_tex.height, cat_tex.pixel_data);
 
-	bool done = false;
+	compositor.data = &state;
-	struct wl_event_source *timer = wl_event_loop_add_timer(event_loop,
+	compositor_run(&compositor);
-		timer_done, &done);
 
-	wl_event_source_timer_update(timer, 30000);
-
-	while (!done) {
-		wl_event_loop_dispatch(event_loop, 0);
-	}
-
-	wl_event_source_remove(timer);
-	wlr_backend_destroy(wlr);
-	wlr_session_finish(session);
 	wlr_surface_destroy(state.cat_texture);
 	wlr_renderer_destroy(state.renderer);
-	wl_display_destroy(display);
 
 	struct output_config *ptr, *tmp;
 	wl_list_for_each_safe(ptr, tmp, &state.config, link) {

example/shared.c

@@ -0,0 +1,432 @@
+#define _POSIX_C_SOURCE 199309L
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <xkbcommon/xkbcommon.h>
+#include <wayland-server-protocol.h>
+#include <wlr/backend.h>
+#include <wlr/session.h>
+#include <wlr/types.h>
+#include "shared.h"
+
+static void keyboard_key_notify(struct wl_listener *listener, void *data) {
+	struct wlr_keyboard_key *event = data;
+	struct keyboard_state *kbstate = wl_container_of(listener, kbstate, key);
+	uint32_t keycode = event->keycode + 8;
+	enum wlr_key_state key_state = event->state;
+	const xkb_keysym_t *syms;
+	int nsyms = xkb_state_key_get_syms(kbstate->xkb_state, keycode, &syms);
+	for (int i = 0; i < nsyms; ++i) {
+		xkb_keysym_t sym = syms[i];
+		char name[64];
+		int l = xkb_keysym_get_name(sym, name, sizeof(name));
+		if (l != -1 && l != sizeof(name)) {
+			fprintf(stderr, "Key event: %s %s\n", name,
+					key_state == WLR_KEY_PRESSED ? "pressed" : "released");
+		}
+		if (kbstate->compositor->keyboard_key_cb) {
+			kbstate->compositor->keyboard_key_cb(kbstate, sym, key_state);
+		}
+	}
+	xkb_state_update_key(kbstate->xkb_state, keycode,
+		event->state == WLR_KEY_PRESSED ?  XKB_KEY_DOWN : XKB_KEY_UP);
+}
+
+static void keyboard_add(struct wlr_input_device *device, struct compositor_state *state) {
+	struct keyboard_state *kbstate = calloc(sizeof(struct keyboard_state), 1);
+	kbstate->device = device;
+	kbstate->compositor = state;
+	wl_list_init(&kbstate->key.link);
+	kbstate->key.notify = keyboard_key_notify;
+	wl_signal_add(&device->keyboard->events.key, &kbstate->key);
+	wl_list_insert(&state->keyboards, &kbstate->link);
+
+	struct xkb_rule_names rules;
+	memset(&rules, 0, sizeof(rules));
+	rules.rules = getenv("XKB_DEFAULT_RULES");
+	rules.model = getenv("XKB_DEFAULT_MODEL");
+	rules.layout = getenv("XKB_DEFAULT_LAYOUT");
+	rules.variant = getenv("XKB_DEFAULT_VARIANT");
+	rules.options = getenv("XKB_DEFAULT_OPTIONS");
+	struct xkb_context *context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
+	if (!context) {
+		fprintf(stderr, "Failed to create XKB context\n");
+		exit(1);
+	}
+	kbstate->keymap = xkb_map_new_from_names(
+			context, &rules, XKB_KEYMAP_COMPILE_NO_FLAGS);
+	if (!kbstate->keymap) {
+		fprintf(stderr, "Failed to create XKB keymap\n");
+		exit(1);
+	}
+	xkb_context_unref(context);
+	kbstate->xkb_state = xkb_state_new(kbstate->keymap);
+	if (!kbstate->xkb_state) {
+		fprintf(stderr, "Failed to create XKB state\n");
+		exit(1);
+	}
+}
+
+static void pointer_motion_notify(struct wl_listener *listener, void *data) {
+	struct wlr_pointer_motion *event = data;
+	struct pointer_state *pstate = wl_container_of(listener, pstate, motion);
+	if (pstate->compositor->pointer_motion_cb) {
+		pstate->compositor->pointer_motion_cb(pstate,
+				event->delta_x, event->delta_y);
+	}
+}
+
+static void pointer_button_notify(struct wl_listener *listener, void *data) {
+	struct wlr_pointer_button *event = data;
+	struct pointer_state *pstate = wl_container_of(listener, pstate, button);
+	if (pstate->compositor->pointer_button_cb) {
+		pstate->compositor->pointer_button_cb(pstate,
+				event->button, event->state);
+	}
+}
+
+static void pointer_axis_notify(struct wl_listener *listener, void *data) {
+	struct wlr_pointer_axis *event = data;
+	struct pointer_state *pstate = wl_container_of(listener, pstate, axis);
+	if (pstate->compositor->pointer_axis_cb) {
+		pstate->compositor->pointer_axis_cb(pstate,
+				event->source, event->orientation, event->delta);
+	}
+}
+
+static void pointer_add(struct wlr_input_device *device, struct compositor_state *state) {
+	struct pointer_state *pstate = calloc(sizeof(struct pointer_state), 1);
+	pstate->device = device;
+	pstate->compositor = state;
+	wl_list_init(&pstate->motion.link);
+	wl_list_init(&pstate->motion_absolute.link);
+	wl_list_init(&pstate->button.link);
+	wl_list_init(&pstate->axis.link);
+	pstate->motion.notify = pointer_motion_notify;
+	pstate->button.notify = pointer_button_notify;
+	pstate->axis.notify = pointer_axis_notify;
+	wl_signal_add(&device->pointer->events.motion, &pstate->motion);
+	wl_signal_add(&device->pointer->events.button, &pstate->button);
+	wl_signal_add(&device->pointer->events.axis, &pstate->axis);
+	wl_list_insert(&state->pointers, &pstate->link);
+}
+
+static void touch_down_notify(struct wl_listener *listener, void *data) {
+	struct wlr_touch_down *event = data;
+	struct touch_state *tstate = wl_container_of(listener, tstate, down);
+	if (tstate->compositor->touch_down_cb) {
+		tstate->compositor->touch_down_cb(tstate, event->slot,
+			event->x_mm, event->y_mm, event->width_mm, event->height_mm);
+	}
+}
+
+static void touch_motion_notify(struct wl_listener *listener, void *data) {
+	struct wlr_touch_motion *event = data;
+	struct touch_state *tstate = wl_container_of(listener, tstate, motion);
+	if (tstate->compositor->touch_motion_cb) {
+		tstate->compositor->touch_motion_cb(tstate, event->slot,
+			event->x_mm, event->y_mm, event->width_mm, event->height_mm);
+	}
+}
+
+static void touch_up_notify(struct wl_listener *listener, void *data) {
+	struct wlr_touch_up *event = data;
+	struct touch_state *tstate = wl_container_of(listener, tstate, up);
+	if (tstate->compositor->touch_up_cb) {
+		tstate->compositor->touch_up_cb(tstate, event->slot);
+	}
+}
+
+static void touch_cancel_notify(struct wl_listener *listener, void *data) {
+	struct wlr_touch_cancel *event = data;
+	struct touch_state *tstate = wl_container_of(listener, tstate, cancel);
+	if (tstate->compositor->touch_cancel_cb) {
+		tstate->compositor->touch_cancel_cb(tstate, event->slot);
+	}
+}
+
+static void touch_add(struct wlr_input_device *device, struct compositor_state *state) {
+	struct touch_state *tstate = calloc(sizeof(struct touch_state), 1);
+	tstate->device = device;
+	tstate->compositor = state;
+	wl_list_init(&tstate->down.link);
+	wl_list_init(&tstate->motion.link);
+	wl_list_init(&tstate->up.link);
+	wl_list_init(&tstate->cancel.link);
+	tstate->down.notify = touch_down_notify;
+	tstate->motion.notify = touch_motion_notify;
+	tstate->up.notify = touch_up_notify;
+	tstate->cancel.notify = touch_cancel_notify;
+	wl_signal_add(&device->touch->events.down, &tstate->down);
+	wl_signal_add(&device->touch->events.motion, &tstate->motion);
+	wl_signal_add(&device->touch->events.up, &tstate->up);
+	wl_signal_add(&device->touch->events.cancel, &tstate->cancel);
+	wl_list_insert(&state->touch, &tstate->link);
+}
+
+static void tablet_tool_axis_notify(struct wl_listener *listener, void *data) {
+	struct wlr_tablet_tool_axis *event = data;
+	struct tablet_tool_state *tstate = wl_container_of(listener, tstate, axis);
+	if (tstate->compositor->tool_axis_cb) {
+		tstate->compositor->tool_axis_cb(tstate, event);
+	}
+}
+
+static void tablet_tool_proximity_notify(struct wl_listener *listener, void *data) {
+	struct wlr_tablet_tool_proximity *event = data;
+	struct tablet_tool_state *tstate = wl_container_of(listener, tstate, proximity);
+	if (tstate->compositor->tool_proximity_cb) {
+		tstate->compositor->tool_proximity_cb(tstate, event->state);
+	}
+}
+
+static void tablet_tool_button_notify(struct wl_listener *listener, void *data) {
+	struct wlr_tablet_tool_button *event = data;
+	struct tablet_tool_state *tstate = wl_container_of(listener, tstate, button);
+	if (tstate->compositor->tool_button_cb) {
+		tstate->compositor->tool_button_cb(tstate, event->button, event->state);
+	}
+}
+
+static void tablet_tool_add(struct wlr_input_device *device,
+		struct compositor_state *state) {
+	struct tablet_tool_state *tstate = calloc(sizeof(struct tablet_tool_state), 1);
+	tstate->device = device;
+	tstate->compositor = state;
+	wl_list_init(&tstate->axis.link);
+	wl_list_init(&tstate->proximity.link);
+	wl_list_init(&tstate->tip.link);
+	wl_list_init(&tstate->button.link);
+	tstate->axis.notify = tablet_tool_axis_notify;
+	tstate->proximity.notify = tablet_tool_proximity_notify;
+	//tstate->tip.notify = tablet_tool_tip_notify;
+	tstate->button.notify = tablet_tool_button_notify;
+	wl_signal_add(&device->tablet_tool->events.axis, &tstate->axis);
+	wl_signal_add(&device->tablet_tool->events.proximity, &tstate->proximity);
+	//wl_signal_add(&device->tablet_tool->events.tip, &tstate->tip);
+	wl_signal_add(&device->tablet_tool->events.button, &tstate->button);
+	wl_list_insert(&state->tablet_tools, &tstate->link);
+}
+
+static void input_add_notify(struct wl_listener *listener, void *data) {
+	struct wlr_input_device *device = data;
+	struct compositor_state *state = wl_container_of(listener, state, input_add);
+	switch (device->type) {
+	case WLR_INPUT_DEVICE_KEYBOARD:
+		keyboard_add(device, state);
+		break;
+	case WLR_INPUT_DEVICE_POINTER:
+		pointer_add(device, state);
+		break;
+	case WLR_INPUT_DEVICE_TOUCH:
+		touch_add(device, state);
+		break;
+	case WLR_INPUT_DEVICE_TABLET_TOOL:
+		tablet_tool_add(device, state);
+	default:
+		break;
+	}
+}
+
+static void keyboard_remove(struct wlr_input_device *device, struct compositor_state *state) {
+	struct keyboard_state *kbstate = NULL, *_kbstate;
+	wl_list_for_each(_kbstate, &state->keyboards, link) {
+		if (_kbstate->device == device) {
+			kbstate = _kbstate;
+			break;
+		}
+	}
+	if (!kbstate) {
+		return;
+	}
+	wl_list_remove(&kbstate->link);
+	wl_list_remove(&kbstate->key.link);
+}
+
+static void pointer_remove(struct wlr_input_device *device, struct compositor_state *state) {
+	struct pointer_state *pstate = NULL, *_pstate;
+	wl_list_for_each(_pstate, &state->pointers, link) {
+		if (_pstate->device == device) {
+			pstate = _pstate;
+			break;
+		}
+	}
+	if (!pstate) {
+		return;
+	}
+	wl_list_remove(&pstate->link);
+	wl_list_remove(&pstate->motion.link);
+	//wl_list_remove(&pstate->motion_absolute.link);
+	wl_list_remove(&pstate->button.link);
+	wl_list_remove(&pstate->axis.link);
+}
+
+static void touch_remove(struct wlr_input_device *device, struct compositor_state *state) {
+	struct touch_state *tstate = NULL, *_tstate;
+	wl_list_for_each(_tstate, &state->touch, link) {
+		if (_tstate->device == device) {
+			tstate = _tstate;
+			break;
+		}
+	}
+	if (!tstate) {
+		return;
+	}
+	wl_list_remove(&tstate->link);
+	wl_list_remove(&tstate->down.link);
+	wl_list_remove(&tstate->motion.link);
+	wl_list_remove(&tstate->up.link);
+	wl_list_remove(&tstate->cancel.link);
+}
+
+static void tablet_tool_remove(struct wlr_input_device *device, struct compositor_state *state) {
+	struct tablet_tool_state *tstate = NULL, *_tstate;
+	wl_list_for_each(_tstate, &state->tablet_tools, link) {
+		if (_tstate->device == device) {
+			tstate = _tstate;
+			break;
+		}
+	}
+	if (!tstate) {
+		return;
+	}
+	wl_list_remove(&tstate->link);
+	wl_list_remove(&tstate->axis.link);
+	wl_list_remove(&tstate->proximity.link);
+	//wl_list_remove(&tstate->tip.link);
+	wl_list_remove(&tstate->button.link);
+}
+
+static void input_remove_notify(struct wl_listener *listener, void *data) {
+	struct wlr_input_device *device = data;
+	struct compositor_state *state = wl_container_of(listener, state, input_add);
+	switch (device->type) {
+	case WLR_INPUT_DEVICE_KEYBOARD:
+		keyboard_remove(device, state);
+		break;
+	case WLR_INPUT_DEVICE_POINTER:
+		pointer_remove(device, state);
+		break;
+	case WLR_INPUT_DEVICE_TOUCH:
+		touch_remove(device, state);
+		break;
+	case WLR_INPUT_DEVICE_TABLET_TOOL:
+		tablet_tool_remove(device, state);
+		break;
+	default:
+		break;
+	}
+}
+
+static void output_frame_notify(struct wl_listener *listener, void *data) {
+	struct output_state *output = wl_container_of(listener, output, frame);
+	struct compositor_state *compositor = output->compositor;
+
+	struct timespec now;
+	clock_gettime(CLOCK_MONOTONIC, &now);
+	if (compositor->output_frame_cb) {
+		compositor->output_frame_cb(output, &now);
+	}
+
+	output->last_frame = now;
+	compositor->last_frame = now;
+}
+
+static void output_add_notify(struct wl_listener *listener, void *data) {
+	struct wlr_output *output = data;
+	struct compositor_state *state = wl_container_of(listener, state, output_add);
+	fprintf(stderr, "Output '%s' added\n", output->name);
+	fprintf(stderr, "%s %s %"PRId32"mm x %"PRId32"mm\n", output->make, output->model,
+		output->phys_width, output->phys_height);
+	wlr_output_set_mode(output, output->modes->items[0]);
+	struct output_state *ostate = calloc(1, sizeof(struct output_state));
+	clock_gettime(CLOCK_MONOTONIC, &ostate->last_frame);
+	ostate->output = output;
+	ostate->compositor = state;
+	ostate->frame.notify = output_frame_notify;
+	wl_list_init(&ostate->frame.link);
+	wl_signal_add(&output->events.frame, &ostate->frame);
+	wl_list_insert(&state->outputs, &ostate->link);
+	if (state->output_add_cb) {
+		state->output_add_cb(ostate);
+	}
+}
+
+static void output_remove_notify(struct wl_listener *listener, void *data) {
+	struct wlr_output *output = data;
+	struct compositor_state *state = wl_container_of(listener, state, output_remove);
+	struct output_state *ostate = NULL, *_ostate;
+	wl_list_for_each(_ostate, &state->outputs, link) {
+		if (_ostate->output == output) {
+			ostate = _ostate;
+			break;
+		}
+	}
+	if (!ostate) {
+		return; // We are unfamiliar with this output
+	}
+	if (state->output_remove_cb) {
+		state->output_remove_cb(ostate);
+	}
+	wl_list_remove(&ostate->link);
+	wl_list_remove(&ostate->frame.link);
+}
+
+void compositor_init(struct compositor_state *state) {
+	memset(state, 0, sizeof(struct compositor_state));
+
+	state->display = wl_display_create();
+	state->event_loop = wl_display_get_event_loop(state->display);
+	state->session = wlr_session_start(state->display);
+	if (!state->session
+			|| !state->display
+			|| !state->event_loop) {
+		exit(1);
+	}
+
+	wl_list_init(&state->keyboards);
+	wl_list_init(&state->pointers);
+	wl_list_init(&state->touch);
+	wl_list_init(&state->tablet_tools);
+	wl_list_init(&state->input_add.link);
+	state->input_add.notify = input_add_notify;
+	wl_list_init(&state->input_remove.link);
+	state->input_remove.notify = input_remove_notify;
+
+	wl_list_init(&state->outputs);
+	wl_list_init(&state->output_add.link);
+	state->output_add.notify = output_add_notify;
+	wl_list_init(&state->output_remove.link);
+	state->output_remove.notify = output_remove_notify;
+
+	struct wlr_backend *wlr = wlr_backend_autocreate(
+			state->display, state->session);
+	if (!wlr) {
+		exit(1);
+	}
+	wl_signal_add(&wlr->events.input_add, &state->input_add);
+	wl_signal_add(&wlr->events.input_remove, &state->input_remove);
+	wl_signal_add(&wlr->events.output_add, &state->output_add);
+	wl_signal_add(&wlr->events.output_remove, &state->output_remove);
+	state->backend = wlr;
+
+	clock_gettime(CLOCK_MONOTONIC, &state->last_frame);
+}
+
+void compositor_run(struct compositor_state *state) {
+	if (!wlr_backend_init(state->backend)) {
+		fprintf(stderr, "Failed to initialize backend\n");
+		exit(1);
+	}
+
+	while (!state->exit) {
+		wl_event_loop_dispatch(state->event_loop, 0);
+	}
+
+	wlr_backend_destroy(state->backend);
+	wlr_session_finish(state->session);
+	wl_display_destroy(state->display);
+}

example/shared.h

@@ -0,0 +1,119 @@
+#ifndef _EXAMPLE_SHARED_H
+#define _EXAMPLE_SHARED_H
+#define _POSIX_C_SOURCE 199309L
+#include <time.h>
+#include <stdbool.h>
+#include <xkbcommon/xkbcommon.h>
+#include <wayland-server-protocol.h>
+#include <wlr/backend.h>
+#include <wlr/session.h>
+#include <wlr/types.h>
+
+struct output_state {
+	struct compositor_state *compositor;
+	struct wlr_output *output;
+	struct wl_listener frame;
+	struct timespec last_frame;
+	struct wl_list link;
+	void *data;
+};
+
+struct keyboard_state {
+	struct compositor_state *compositor;
+	struct wlr_input_device *device;
+	struct wl_listener key;
+	struct wl_list link;
+	struct xkb_keymap *keymap;
+	struct xkb_state *xkb_state;
+	void *data;
+};
+
+struct pointer_state {
+	struct compositor_state *compositor;
+	struct wlr_input_device *device;
+	struct wl_listener motion;
+	struct wl_listener motion_absolute;
+	struct wl_listener button;
+	struct wl_listener axis;
+	struct wl_list link;
+	void *data;
+};
+
+struct touch_state {
+	struct compositor_state *compositor;
+	struct wlr_input_device *device;
+	struct wl_listener down;
+	struct wl_listener up;
+	struct wl_listener motion;
+	struct wl_listener cancel;
+	struct wl_list link;
+	void *data;
+};
+
+struct tablet_tool_state {
+	struct compositor_state *compositor;
+	struct wlr_input_device *device;
+	struct wl_listener axis;
+	struct wl_listener proximity;
+	struct wl_listener tip;
+	struct wl_listener button;
+	struct wl_list link;
+	void *data;
+};
+
+struct compositor_state {
+	void (*output_add_cb)(struct output_state *s);
+	void (*keyboard_add_cb)(struct keyboard_state *s);
+	void (*output_frame_cb)(struct output_state *s, struct timespec *ts);
+	void (*output_remove_cb)(struct output_state *s);
+	void (*keyboard_remove_cb)(struct keyboard_state *s);
+	void (*keyboard_key_cb)(struct keyboard_state *s, xkb_keysym_t sym,
+			enum wlr_key_state key_state);
+	void (*pointer_motion_cb)(struct pointer_state *s,
+			double d_x, double d_y);
+	void (*pointer_button_cb)(struct pointer_state *s,
+			uint32_t button, enum wlr_button_state state);
+	void (*pointer_axis_cb)(struct pointer_state *s,
+		enum wlr_axis_source source,
+		enum wlr_axis_orientation orientation,
+		double delta);
+	void (*touch_down_cb)(struct touch_state *s, int32_t slot,
+		double x, double y, double width, double height);
+	void (*touch_motion_cb)(struct touch_state *s, int32_t slot,
+		double x, double y, double width, double height);
+	void (*touch_up_cb)(struct touch_state *s, int32_t slot);
+	void (*touch_cancel_cb)(struct touch_state *s, int32_t slot);
+	void (*tool_axis_cb)(struct tablet_tool_state *s,
+			struct wlr_tablet_tool_axis *event);
+	void (*tool_proximity_cb)(struct tablet_tool_state *s,
+			enum wlr_tablet_tool_proximity_state proximity);
+	void (*tool_tip_cb)(struct tablet_tool_state *s,
+			enum wlr_tablet_tool_tip_state state);
+	void (*tool_button_cb)(struct tablet_tool_state *s,
+			uint32_t button, enum wlr_button_state state);
+
+	struct wl_display *display;
+	struct wl_event_loop *event_loop;
+	struct wlr_backend *backend;
+	struct wlr_session *session;
+
+	struct wl_list keyboards;
+	struct wl_list pointers;
+	struct wl_list touch;
+	struct wl_list tablet_tools;
+	struct wl_listener input_add;
+	struct wl_listener input_remove;
+
+	struct timespec last_frame;
+	struct wl_listener output_add;
+	struct wl_listener output_remove;
+	struct wl_list outputs;
+
+	bool exit;
+	void *data;
+};
+
+void compositor_init(struct compositor_state *state);
+void compositor_run(struct compositor_state *state);
+
+#endif

example/simple.c

@@ -1,4 +1,5 @@
 #define _POSIX_C_SOURCE 199309L
+#include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
@@ -8,152 +9,52 @@
 #include <wlr/backend.h>
 #include <wlr/session.h>
 #include <wlr/types.h>
+#include <xkbcommon/xkbcommon.h>
+#include "shared.h"
 
-struct state {
+struct sample_state {
 	float color[3];
 	int dec;
-	struct timespec last_frame;
-	struct wl_listener output_add;
-	struct wl_listener output_remove;
-	struct wl_list outputs;
 };
 
-struct output_state {
+void handle_output_frame(struct output_state *output, struct timespec *ts) {
-	struct wl_list link;
+	struct compositor_state *state = output->compositor;
-	struct wlr_output *output;
+	struct sample_state *sample = state->data;
-	struct state *state;
-	struct wl_listener frame;
-};
 
-void output_frame(struct wl_listener *listener, void *data) {
+	long ms = (ts->tv_sec - state->last_frame.tv_sec) * 1000 +
-	struct output_state *ostate = wl_container_of(listener, ostate, frame);
+		(ts->tv_nsec - state->last_frame.tv_nsec) / 1000000;
-	struct state *s = ostate->state;
+	int inc = (sample->dec + 1) % 3;
 
-	struct timespec now;
+	sample->color[inc] += ms / 2000.0f;
-	clock_gettime(CLOCK_MONOTONIC, &now);
+	sample->color[sample->dec] -= ms / 2000.0f;
 
-	long ms = (now.tv_sec - s->last_frame.tv_sec) * 1000 +
+	if (sample->color[sample->dec] < 0.0f) {
-		(now.tv_nsec - s->last_frame.tv_nsec) / 1000000;
+		sample->color[inc] = 1.0f;
-	int inc = (s->dec + 1) % 3;
+		sample->color[sample->dec] = 0.0f;
-
+		sample->dec = inc;
-	s->color[inc] += ms / 2000.0f;
-	s->color[s->dec] -= ms / 2000.0f;
-
-	if (s->color[s->dec] < 0.0f) {
-		s->color[inc] = 1.0f;
-		s->color[s->dec] = 0.0f;
-		s->dec = inc;
 	}
 
-	s->last_frame = now;
+	glClearColor(sample->color[0], sample->color[1], sample->color[2], 1.0);
-
-	glClearColor(s->color[0], s->color[1], s->color[2], 1.0);
 	glClear(GL_COLOR_BUFFER_BIT);
 }
 
-void output_add(struct wl_listener *listener, void *data) {
+static void handle_keyboard_key(struct keyboard_state *kbstate,
-	struct wlr_output *output = data;
+		xkb_keysym_t sym, enum wlr_key_state key_state) {
-	struct state *state = wl_container_of(listener, state, output_add);
+	if (sym == XKB_KEY_Escape) {
-	fprintf(stderr, "Output '%s' added\n", output->name);
+		kbstate->compositor->exit = true;
-	fprintf(stderr, "%s %s %"PRId32"mm x %"PRId32"mm\n", output->make, output->model,
-		output->phys_width, output->phys_height);
-	wlr_output_set_mode(output, output->modes->items[0]);
-	struct output_state *ostate = calloc(1, sizeof(struct output_state));
-	ostate->output = output;
-	ostate->state = state;
-	ostate->frame.notify = output_frame;
-	wl_list_init(&ostate->frame.link);
-	wl_signal_add(&output->events.frame, &ostate->frame);
-	wl_list_insert(&state->outputs, &ostate->link);
 	}
-
-void output_remove(struct wl_listener *listener, void *data) {
-	struct wlr_output *output = data;
-	struct state *state = wl_container_of(listener, state, output_remove);
-	struct output_state *ostate = NULL, *_ostate;
-	wl_list_for_each(_ostate, &state->outputs, link) {
-		if (_ostate->output == output) {
-			ostate = _ostate;
-			break;
-		}
-	}
-	if (!ostate) {
-		return; // We are unfamiliar with this output
-	}
-	wl_list_remove(&ostate->link);
-	wl_list_remove(&ostate->frame.link);
-}
-
-int timer_done(void *data) {
-	*(bool *)data = true;
-	return 1;
-}
-
-int enable_outputs(void *data) {
-	struct state *state = data;
-	struct output_state *ostate;
-	wl_list_for_each(ostate, &state->outputs, link) {
-		struct wlr_output *output = ostate->output;
-		wlr_output_enable(output, true);
-	}
-	return 1;
-}
-
-int disable_outputs(void *data) {
-	struct state *state = data;
-	struct output_state *ostate;
-	wl_list_for_each(ostate, &state->outputs, link) {
-		struct wlr_output *output = ostate->output;
-		wlr_output_enable(output, false);
-	}
-	return 1;
 }
 
 int main() {
-	struct state state = {
+	struct sample_state state = {
 		.color = { 1.0, 0.0, 0.0 },
 		.dec = 0,
-		.output_add = { .notify = output_add },
-		.output_remove = { .notify = output_remove }
 	};
+	struct compositor_state compositor;
 
-	wl_list_init(&state.outputs);
+	compositor_init(&compositor);
-	wl_list_init(&state.output_add.link);
+	compositor.output_frame_cb = handle_output_frame;
-	wl_list_init(&state.output_remove.link);
+	compositor.keyboard_key_cb = handle_keyboard_key;
-	clock_gettime(CLOCK_MONOTONIC, &state.last_frame);
+	compositor.data = &state;
-
+	compositor_run(&compositor);
-	struct wl_display *display = wl_display_create();
-	struct wl_event_loop *event_loop = wl_display_get_event_loop(display);
-
-	struct wlr_session *session = wlr_session_start(display);
-	if (!session) {
-		return 1;
-	}
-
-	struct wlr_backend *wlr = wlr_backend_autocreate(display, session);
-	wl_signal_add(&wlr->events.output_add, &state.output_add);
-	wl_signal_add(&wlr->events.output_remove, &state.output_remove);
-	if (!wlr || !wlr_backend_init(wlr)) {
-		return 1;
-	}
-
-	bool done = false;
-	struct wl_event_source *timer = wl_event_loop_add_timer(event_loop,
-		timer_done, &done);
-	struct wl_event_source *timer_disable_outputs =
-		wl_event_loop_add_timer(event_loop, disable_outputs, &state);
-	struct wl_event_source *timer_enable_outputs =
-		wl_event_loop_add_timer(event_loop, enable_outputs, &state);
-
-	wl_event_source_timer_update(timer, 20000);
-	wl_event_source_timer_update(timer_disable_outputs, 5000);
-	wl_event_source_timer_update(timer_enable_outputs, 10000);
-
-	while (!done) {
-		wl_event_loop_dispatch(event_loop, 0);
-	}
-
-	wl_event_source_remove(timer);
-	wlr_backend_destroy(wlr);
-	wl_display_destroy(display);
 }

example/tablet.c

@@ -0,0 +1,143 @@
+#define _POSIX_C_SOURCE 199309L
+#define _XOPEN_SOURCE 500
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <string.h>
+#include <unistd.h>
+#include <wayland-server.h>
+#include <wayland-server-protocol.h>
+#include <xkbcommon/xkbcommon.h>
+#include <GLES3/gl3.h>
+#include <wlr/render/matrix.h>
+#include <wlr/render/gles3.h>
+#include <wlr/render.h>
+#include <wlr/backend.h>
+#include <wlr/session.h>
+#include <wlr/types.h>
+#include <math.h>
+#include "shared.h"
+#include "cat.h"
+
+struct sample_state {
+	struct wlr_renderer *renderer;
+	bool proximity, tap;
+	double distance;
+	double pressure;
+	double x_mm, y_mm;
+	double width_mm, height_mm;
+	struct wl_list link;
+	float tool_color[4];
+};
+
+static void handle_output_frame(struct output_state *output, struct timespec *ts) {
+	struct compositor_state *state = output->compositor;
+	struct sample_state *sample = state->data;
+	struct wlr_output *wlr_output = output->output;
+
+	int32_t width, height;
+	wlr_output_effective_resolution(wlr_output, &width, &height);
+
+	wlr_renderer_begin(sample->renderer, wlr_output);
+
+	float matrix[16], view[16];
+	float pad_color[4] = { 0.75, 0.75, 0.75, 1.0 };
+	float distance = 0.8f * (1 - sample->distance);
+	float tool_color[4] = { distance, distance, distance, 1 };
+	for (size_t i = 0; i < 4; ++i) {
+		tool_color[i] *= sample->tool_color[i];
+	}
+	float scale = 4;
+
+	float pad_width = sample->width_mm * scale;
+	float pad_height = sample->height_mm * scale;
+	float left = width / 2.0f - pad_width / 2.0f;
+	float top = height / 2.0f - pad_height / 2.0f;
+	wlr_matrix_translate(&matrix, left, top, 0);
+	wlr_matrix_scale(&view, pad_width, pad_height, 1);
+	wlr_matrix_mul(&matrix, &view, &view);
+	wlr_matrix_mul(&wlr_output->transform_matrix, &view, &matrix);
+	wlr_render_colored_quad(sample->renderer, &pad_color, &matrix);
+
+	if (sample->proximity) {
+		wlr_matrix_translate(&matrix,
+				sample->x_mm * scale - 8 * (sample->pressure + 1) + left,
+				sample->y_mm * scale - 8 * (sample->pressure + 1) + top, 0);
+		wlr_matrix_scale(&view,
+				16 * (sample->pressure + 1),
+				16 * (sample->pressure + 1), 1);
+		wlr_matrix_mul(&matrix, &view, &view);
+		wlr_matrix_mul(&wlr_output->transform_matrix, &view, &matrix);
+		wlr_render_colored_ellipse(sample->renderer, &tool_color, &matrix);
+	}
+
+	wlr_renderer_end(sample->renderer);
+}
+
+static void handle_keyboard_key(struct keyboard_state *kbstate,
+		xkb_keysym_t sym, enum wlr_key_state key_state) {
+	if (sym == XKB_KEY_Escape) {
+		kbstate->compositor->exit = true;
+	}
+}
+
+static void handle_tool_axis(struct tablet_tool_state *tstate,
+			struct wlr_tablet_tool_axis *event) {
+	struct sample_state *sample = tstate->compositor->data;
+	sample->width_mm = event->width_mm;
+	sample->height_mm = event->height_mm;
+	if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_X)) {
+		sample->x_mm = event->x_mm;
+	}
+	if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_Y)) {
+		sample->y_mm = event->y_mm;
+	}
+	if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_DISTANCE)) {
+		sample->distance = event->distance;
+	}
+	if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_PRESSURE)) {
+		sample->pressure = event->pressure;
+	}
+}
+
+static void handle_tool_proximity(struct tablet_tool_state *tstate,
+		enum wlr_tablet_tool_proximity_state state) {
+	struct sample_state *sample = tstate->compositor->data;
+	sample->proximity = state == WLR_TABLET_TOOL_PROXIMITY_IN;
+}
+
+static void handle_tool_button(struct tablet_tool_state *tstate,
+		uint32_t button, enum wlr_button_state state) {
+	struct sample_state *sample = tstate->compositor->data;
+	if (state == WLR_BUTTON_RELEASED) {
+		float default_color[4] = { 1, 1, 1, 1 };
+		memcpy(sample->tool_color, default_color, 4);
+	} else {
+		for (size_t i = 0; i < 3; ++i) {
+			if (button % 3 != i) {
+				sample->tool_color[button % 3] = 0;
+			}
+		}
+	}
+}
+
+int main(int argc, char *argv[]) {
+	struct sample_state state = {
+		.tool_color = { 1, 1, 1, 1 }
+	};
+	struct compositor_state compositor;
+
+	compositor_init(&compositor);
+	compositor.output_frame_cb = handle_output_frame;
+	compositor.keyboard_key_cb = handle_keyboard_key;
+	compositor.tool_axis_cb = handle_tool_axis;
+	compositor.tool_proximity_cb = handle_tool_proximity;
+	compositor.tool_button_cb = handle_tool_button;
+
+	state.renderer = wlr_gles3_renderer_init();
+
+	compositor.data = &state;
+	compositor_run(&compositor);
+
+	wlr_renderer_destroy(state.renderer);
+}

example/touch.c

@@ -0,0 +1,122 @@
+#define _POSIX_C_SOURCE 199309L
+#define _XOPEN_SOURCE 500
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <math.h>
+#include <wayland-server.h>
+#include <wayland-server-protocol.h>
+#include <xkbcommon/xkbcommon.h>
+#include <GLES3/gl3.h>
+#include <wlr/common/list.h>
+#include <wlr/render/matrix.h>
+#include <wlr/render/gles3.h>
+#include <wlr/render.h>
+#include <wlr/backend.h>
+#include <wlr/session.h>
+#include <wlr/types.h>
+#include "shared.h"
+#include "cat.h"
+
+struct sample_state {
+	struct wlr_renderer *renderer;
+	struct wlr_surface *cat_texture;
+	list_t *touch_points;
+};
+
+struct touch_point {
+	int32_t slot;
+	double x, y;
+};
+
+static void handle_output_frame(struct output_state *output, struct timespec *ts) {
+	struct compositor_state *state = output->compositor;
+	struct sample_state *sample = state->data;
+	struct wlr_output *wlr_output = output->output;
+
+	int32_t width, height;
+	wlr_output_effective_resolution(wlr_output, &width, &height);
+	wlr_renderer_begin(sample->renderer, wlr_output);
+
+	float matrix[16];
+	for (size_t i = 0; i < sample->touch_points->length; ++i) {
+		struct touch_point *p = sample->touch_points->items[i];
+		wlr_surface_get_matrix(sample->cat_texture, &matrix,
+			&wlr_output->transform_matrix,
+			(int)(p->x * width) - sample->cat_texture->width / 2,
+			(int)(p->y * height) - sample->cat_texture->height / 2);
+		wlr_render_with_matrix(sample->renderer,
+				sample->cat_texture, &matrix);
+	}
+
+	wlr_renderer_end(sample->renderer);
+}
+
+static void handle_keyboard_key(struct keyboard_state *kbstate,
+		xkb_keysym_t sym, enum wlr_key_state key_state) {
+	if (sym == XKB_KEY_Escape) {
+		kbstate->compositor->exit = true;
+	}
+}
+
+static void handle_touch_down(struct touch_state *tstate, int32_t slot,
+		double x, double y, double width, double height) {
+	struct sample_state *sample = tstate->compositor->data;
+	struct touch_point *point = calloc(1, sizeof(struct touch_state));
+	point->slot = slot;
+	point->x = x / width;
+	point->y = y / height;
+	list_add(sample->touch_points, point);
+}
+
+static void handle_touch_up(struct touch_state *tstate, int32_t slot) {
+	struct sample_state *sample = tstate->compositor->data;
+	for (size_t i = 0; i < sample->touch_points->length; ++i) {
+		struct touch_point *point = sample->touch_points->items[i];
+		if (point->slot == slot) {
+			list_del(sample->touch_points, i);
+			break;
+		}
+	}
+}
+
+static void handle_touch_motion(struct touch_state *tstate, int32_t slot,
+		double x, double y, double width, double height) {
+	struct sample_state *sample = tstate->compositor->data;
+	for (size_t i = 0; i < sample->touch_points->length; ++i) {
+		struct touch_point *point = sample->touch_points->items[i];
+		if (point->slot == slot) {
+			point->x = x / width;
+			point->y = y / height;
+			break;
+		}
+	}
+}
+
+int main(int argc, char *argv[]) {
+	struct sample_state state = {
+		.touch_points = list_create()
+	};
+	struct compositor_state compositor;
+
+	compositor_init(&compositor);
+	compositor.output_frame_cb = handle_output_frame;
+	compositor.keyboard_key_cb = handle_keyboard_key;
+	compositor.touch_down_cb = handle_touch_down;
+	compositor.touch_up_cb = handle_touch_up;
+	compositor.touch_motion_cb = handle_touch_motion;
+
+	state.renderer = wlr_gles3_renderer_init();
+	state.cat_texture = wlr_render_surface_init(state.renderer);
+	wlr_surface_attach_pixels(state.cat_texture, GL_RGBA,
+		cat_tex.width, cat_tex.height, cat_tex.pixel_data);
+
+	compositor.data = &state;
+	compositor_run(&compositor);
+
+	wlr_surface_destroy(state.cat_texture);
+	wlr_renderer_destroy(state.renderer);
+}

include/backend/drm.h

@@ -73,10 +73,12 @@ struct wlr_output_state {
 	drmModeCrtc *old_crtc;
 
 	struct wlr_drm_renderer *renderer;
-	struct gbm_surface *gbm;
-	struct gbm_bo *bo_last;
-	struct gbm_bo *bo_current;
 	EGLSurface *egl;
+	struct gbm_surface *gbm;
+	struct gbm_bo *bo[2];
+	struct gbm_bo *cursor_bo[2];
+	int current_cursor;
+	uint32_t cursor_width, cursor_height;
 
 	bool pageflip_pending;
 	bool cleanup;

include/backend/libinput.h

@@ -0,0 +1,71 @@
+#ifndef _WLR_BACKEND_LIBINPUT_INTERNAL_H
+#define _WLR_BACKEND_LIBINPUT_INTERNAL_H
+#include <libinput.h>
+#include <wlr/backend/interface.h>
+#include <wlr/common/list.h>
+#include <wayland-server-core.h>
+#include "backend/udev.h"
+#include "types.h"
+
+struct wlr_backend_state {
+	struct wlr_backend *backend;
+	struct wlr_session *session;
+	struct wlr_udev *udev;
+	struct wl_display *display;
+
+	struct libinput *libinput;
+	struct wl_event_source *input_event;
+
+	list_t *devices;
+};
+
+struct wlr_input_device_state {
+	struct libinput_device *handle;
+};
+
+void wlr_libinput_event(struct wlr_backend_state *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 *wlr_libinput_keyboard_create(
+		struct libinput_device *device);
+void handle_keyboard_key(struct libinput_event *event,
+		struct libinput_device *device);
+
+struct wlr_pointer *wlr_libinput_pointer_create(
+		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_touch *wlr_libinput_touch_create(
+		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_tool *wlr_libinput_tablet_tool_create(
+		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);
+
+#endif

include/backend/multi.h

@@ -0,0 +1,13 @@
+#ifndef _WLR_MULTI_BACKEND_INTERNAL
+#define _WLR_MULTI_BACKEND_INTERNAL
+
+#include <wlr/backend/interface.h>
+#include <wlr/backend/multi.h>
+#include <wlr/common/list.h>
+
+struct wlr_backend_state {
+	struct wlr_backend *backend;
+	list_t *backends;
+};
+
+#endif

include/render/gles3.h

@@ -13,6 +13,9 @@ struct wlr_surface_state {
 
 struct wlr_surface *gles3_surface_init();
 
+extern const GLchar quad_vertex_src[];
+extern const GLchar quad_fragment_src[];
+extern const GLchar ellipse_fragment_src[];
 extern const GLchar vertex_src[];
 extern const GLchar fragment_src_RGB[];
 extern const GLchar fragment_src_RGBA[];

include/types.h

@@ -11,6 +11,9 @@ struct wlr_output_impl {
 			struct wlr_output_mode *mode);
 	void (*transform)(struct wlr_output_state *state,
 			enum wl_output_transform transform);
+	bool (*set_cursor)(struct wlr_output_state *state,
+		const uint8_t *buf, int32_t stride, uint32_t width, uint32_t height);
+	bool (*move_cursor)(struct wlr_output_state *state, int x, int y);
 	void (*destroy)(struct wlr_output_state *state);
 };
 
@@ -18,4 +21,47 @@ struct wlr_output *wlr_output_create(struct wlr_output_impl *impl,
 		struct wlr_output_state *state);
 void wlr_output_free(struct wlr_output *output);
 
+struct wlr_keyboard_impl {
+	void (*destroy)(struct wlr_keyboard_state *state);
+};
+
+struct wlr_keyboard *wlr_keyboard_create(struct wlr_keyboard_impl *impl,
+		struct wlr_keyboard_state *state);
+void wlr_keyboard_destroy(struct wlr_keyboard *keyboard);
+
+struct wlr_pointer_impl {
+	void (*destroy)(struct wlr_pointer_state *state);
+};
+
+struct wlr_pointer *wlr_pointer_create(struct wlr_pointer_impl *impl,
+		struct wlr_pointer_state *state);
+void wlr_pointer_destroy(struct wlr_pointer *pointer);
+
+struct wlr_touch_impl {
+	void (*destroy)(struct wlr_touch_state *state);
+};
+
+struct wlr_touch *wlr_touch_create(struct wlr_touch_impl *impl,
+		struct wlr_touch_state *state);
+void wlr_touch_destroy(struct wlr_touch *touch);
+
+struct wlr_tablet_tool_impl {
+	void (*destroy)(struct wlr_tablet_tool_state *tool);
+};
+
+struct wlr_tablet_tool *wlr_tablet_tool_create(struct wlr_tablet_tool_impl *impl,
+		struct wlr_tablet_tool_state *state);
+void wlr_tablet_tool_destroy(struct wlr_tablet_tool *tool);
+
+struct wlr_input_device_impl {
+	void (*destroy)(struct wlr_input_device_state *state);
+};
+
+struct wlr_input_device *wlr_input_device_create(
+		enum wlr_input_device_type type,
+		struct wlr_input_device_impl *impl,
+		struct wlr_input_device_state *state,
+		const char *name, int vendor, int product);
+void wlr_input_device_destroy(struct wlr_input_device *dev);
+
 #endif

include/wlr/backend.h

@@ -12,14 +12,10 @@ struct wlr_backend {
 	struct wlr_backend_state *state;
 
 	struct {
+		struct wl_signal input_add;
+		struct wl_signal input_remove;
 		struct wl_signal output_add;
 		struct wl_signal output_remove;
-		struct wl_signal keyboard_add;
-		struct wl_signal keyboard_remove;
-		struct wl_signal pointer_add;
-		struct wl_signal pointer_remove;
-		struct wl_signal touch_add;
-		struct wl_signal touch_remove;
 	} events;
 };
 

include/wlr/backend/libinput.h

@@ -0,0 +1,15 @@
+#ifndef WLR_BACKEND_LIBINPUT_H
+#define WLR_BACKEND_LIBINPUT_H
+
+#include <libinput.h>
+#include <wayland-server.h>
+#include <wlr/session.h>
+#include <wlr/backend.h>
+#include <wlr/backend/udev.h>
+#include <wlr/types.h>
+
+struct wlr_backend *wlr_libinput_backend_create(struct wl_display *display,
+		struct wlr_session *session, struct wlr_udev *udev);
+struct libinput_device *wlr_libinput_get_device_handle(struct wlr_input_device *dev);
+
+#endif

include/wlr/backend/multi.h

@@ -0,0 +1,10 @@
+#ifndef _WLR_BACKEND_MULTI_H
+#define _WLR_BACKEND_MULTI_H
+
+#include <wlr/backend.h>
+
+struct wlr_backend *wlr_multi_backend_create();
+void wlr_multi_backend_add(struct wlr_backend *multi,
+		struct wlr_backend *backend);
+
+#endif

include/wlr/render.h

@@ -28,6 +28,16 @@ struct wlr_surface *wlr_render_surface_init(struct wlr_renderer *r);
  */
 bool wlr_render_with_matrix(struct wlr_renderer *r,
 		struct wlr_surface *surface, const float (*matrix)[16]);
+/**
+ * Renders a solid quad in the specified color.
+ */
+void wlr_render_colored_quad(struct wlr_renderer *r,
+		const float (*color)[4], const float (*matrix)[16]);
+/**
+ * Renders a solid ellipse in the specified color.
+ */
+void wlr_render_colored_ellipse(struct wlr_renderer *r,
+		const float (*color)[4], const float (*matrix)[16]);
 /**
  * Destroys this wlr_renderer. Surfaces must be destroyed separately.
  */

include/wlr/render/interface.h

@@ -19,6 +19,10 @@ struct wlr_renderer_impl {
 	struct wlr_surface *(*surface_init)(struct wlr_renderer_state *state);
 	bool (*render_with_matrix)(struct wlr_renderer_state *state,
 		struct wlr_surface *surface, const float (*matrix)[16]);
+	void (*render_quad)(struct wlr_renderer_state *state,
+			const float (*color)[4], const float (*matrix)[16]);
+	void (*render_ellipse)(struct wlr_renderer_state *state,
+			const float (*color)[4], const float (*matrix)[16]);
 	void (*destroy)(struct wlr_renderer_state *state);
 };
 

include/wlr/types.h

@@ -46,8 +46,245 @@ bool wlr_output_set_mode(struct wlr_output *output,
 		struct wlr_output_mode *mode);
 void wlr_output_transform(struct wlr_output *output,
 		enum wl_output_transform transform);
+bool wlr_output_set_cursor(struct wlr_output *output,
+		const uint8_t *buf, int32_t stride, uint32_t width, uint32_t height);
+bool wlr_output_move_cursor(struct wlr_output *output, int x, int y);
 void wlr_output_destroy(struct wlr_output *output);
 void wlr_output_effective_resolution(struct wlr_output *output,
 		int *width, int *height);
 
+struct wlr_keyboard_state;
+struct wlr_keyboard_impl;
+
+struct wlr_keyboard {
+	struct wlr_keyboard_state *state;
+	struct wlr_keyboard_impl *impl;
+
+	struct {
+		struct wl_signal key;
+	} events;
+};
+
+enum wlr_key_state {
+	WLR_KEY_RELEASED,
+	WLR_KEY_PRESSED,
+};
+
+struct wlr_keyboard_key {
+	uint32_t time_sec;
+	uint64_t time_usec;
+	uint32_t keycode;
+	enum wlr_key_state state;
+};
+
+struct wlr_pointer_state;
+struct wlr_pointer_impl;
+
+struct wlr_pointer {
+	struct wlr_pointer_state *state;
+	struct wlr_pointer_impl *impl;
+
+	struct {
+		struct wl_signal motion;
+		struct wl_signal motion_absolute;
+		struct wl_signal button;
+		struct wl_signal axis;
+	} events;
+};
+
+struct wlr_pointer_motion {
+	uint32_t time_sec;
+	uint64_t time_usec;
+	double delta_x, delta_y;
+};
+
+struct wlr_pointer_motion_absolute {
+	uint32_t time_sec;
+	uint64_t time_usec;
+	double x_mm, y_mm;
+	double width_mm, height_mm;
+};
+
+enum wlr_button_state {
+	WLR_BUTTON_RELEASED,
+	WLR_BUTTON_PRESSED,
+};
+
+struct wlr_pointer_button {
+	uint32_t time_sec;
+	uint64_t time_usec;
+	uint32_t button;
+	enum wlr_button_state state;
+};
+
+enum wlr_axis_source {
+	WLR_AXIS_SOURCE_WHEEL,
+	WLR_AXIS_SOURCE_FINGER,
+	WLR_AXIS_SOURCE_CONTINUOUS,
+	WLR_AXIS_SOURCE_WHEEL_TILT,
+};
+
+enum wlr_axis_orientation {
+	WLR_AXIS_ORIENTATION_VERTICAL,
+	WLR_AXIS_ORIENTATION_HORIZONTAL,
+};
+
+struct wlr_pointer_axis {
+	uint32_t time_sec;
+	uint64_t time_usec;
+	enum wlr_axis_source source;
+	enum wlr_axis_orientation orientation;
+	double delta;
+};
+
+struct wlr_touch_state;
+struct wlr_touch_impl;
+
+struct wlr_touch {
+	struct wlr_touch_state *state;
+	struct wlr_touch_impl *impl;
+
+	struct {
+		struct wl_signal down;
+		struct wl_signal up;
+		struct wl_signal motion;
+		struct wl_signal cancel;
+	} events;
+};
+
+struct wlr_touch_down {
+	uint32_t time_sec;
+	uint64_t time_usec;
+	int32_t slot;
+	double x_mm, y_mm;
+	double width_mm, height_mm;
+};
+
+struct wlr_touch_up {
+	uint32_t time_sec;
+	uint64_t time_usec;
+	int32_t slot;
+};
+
+struct wlr_touch_motion {
+	uint32_t time_sec;
+	uint64_t time_usec;
+	int32_t slot;
+	double x_mm, y_mm;
+	double width_mm, height_mm;
+};
+
+struct wlr_touch_cancel {
+	uint32_t time_sec;
+	uint64_t time_usec;
+	int32_t slot;
+};
+
+struct wlr_tablet_tool_impl;
+struct wlr_tablet_tool_state;
+
+struct wlr_tablet_tool {
+	struct wlr_tablet_tool_impl *impl;
+	struct wlr_tablet_tool_state *state;
+
+	struct {
+		struct wl_signal axis;
+		struct wl_signal proximity;
+		struct wl_signal tip;
+		struct wl_signal button;
+	} events;
+};
+
+enum wlr_tablet_tool_axes {
+	WLR_TABLET_TOOL_AXIS_X = 1,
+	WLR_TABLET_TOOL_AXIS_Y = 2,
+	WLR_TABLET_TOOL_AXIS_DISTANCE = 4,
+	WLR_TABLET_TOOL_AXIS_PRESSURE = 8,
+	WLR_TABLET_TOOL_AXIS_TILT_X = 16,
+	WLR_TABLET_TOOL_AXIS_TILT_Y = 32,
+	WLR_TABLET_TOOL_AXIS_ROTATION = 64,
+	WLR_TABLET_TOOL_AXIS_SLIDER = 128,
+	WLR_TABLET_TOOL_AXIS_WHEEL = 256,
+};
+
+struct wlr_tablet_tool_axis {
+	uint32_t time_sec;
+	uint64_t time_usec;
+	uint32_t updated_axes;
+	double x_mm, y_mm;
+	double width_mm, height_mm;
+	double pressure;
+	double distance;
+	double tilt_x, tilt_y;
+	double rotation;
+	double slider;
+	double wheel_delta;
+};
+
+enum wlr_tablet_tool_proximity_state {
+	WLR_TABLET_TOOL_PROXIMITY_OUT,
+	WLR_TABLET_TOOL_PROXIMITY_IN,
+};
+
+struct wlr_tablet_tool_proximity {
+	uint32_t time_sec;
+	uint64_t time_usec;
+	double x, y;
+	double width_mm, height_mm;
+	enum wlr_tablet_tool_proximity_state state;
+};
+
+enum wlr_tablet_tool_tip_state {
+	WLR_TABLET_TOOL_TIP_UP,
+	WLR_TABLET_TOOL_TIP_DOWN,
+};
+
+struct wlr_tablet_tool_tip {
+	uint32_t time_sec;
+	uint64_t time_usec;
+	double x, y;
+	double width_mm, height_mm;
+	enum wlr_tablet_tool_tip_state state;
+};
+
+struct wlr_tablet_tool_button {
+	uint32_t time_sec;
+	uint64_t time_usec;
+	uint32_t button;
+	enum wlr_button_state state;
+};
+
+// TODO: tablet pad
+// TODO: switch
+
+enum wlr_input_device_type {
+	WLR_INPUT_DEVICE_KEYBOARD,
+	WLR_INPUT_DEVICE_POINTER,
+	WLR_INPUT_DEVICE_TOUCH,
+	WLR_INPUT_DEVICE_TABLET_TOOL,
+	WLR_INPUT_DEVICE_TABLET_PAD,
+	WLR_INPUT_DEVICE_GESTURE,
+	WLR_INPUT_DEVICE_SWITCH,
+};
+
+struct wlr_input_device_state;
+struct wlr_input_device_impl;
+
+struct wlr_input_device {
+	struct wlr_input_device_state *state;
+	struct wlr_input_device_impl *impl;
+
+	enum wlr_input_device_type type;
+	int vendor, product;
+	char *name;
+
+	union {
+		void *_device;
+		struct wlr_keyboard *keyboard;
+		struct wlr_pointer *pointer;
+		struct wlr_touch *touch;
+		struct wlr_tablet_tool *tablet_tool;
+	};
+};
+
 #endif

render/gles3/renderer.c

@@ -13,6 +13,8 @@
 static struct {
 	bool initialized;
 	GLuint rgb, rgba;
+	GLuint quad;
+	GLuint ellipse;
 } shaders;
 static GLuint vao, vbo, ebo;
 
@@ -28,6 +30,9 @@ static bool compile_shader(GLuint type, const GLchar *src, GLuint *shader) {
 		GL_CALL(glGetShaderiv(*shader, GL_INFO_LOG_LENGTH, &loglen));
 		GLchar msg[loglen];
 		GL_CALL(glGetShaderInfoLog(*shader, loglen, &loglen, msg));
+		wlr_log(L_ERROR, "Shader compilation failed");
+		wlr_log(L_ERROR, "%s", msg);
+		exit(1);
 		return false;
 	}
 	return true;
@@ -60,6 +65,12 @@ static void init_default_shaders() {
 	if (!compile_program(vertex_src, fragment_src_RGBA, &shaders.rgba)) {
 		goto error;
 	}
+	if (!compile_program(quad_vertex_src, quad_fragment_src, &shaders.quad)) {
+		goto error;
+	}
+	if (!compile_program(quad_vertex_src, ellipse_fragment_src, &shaders.ellipse)) {
+		goto error;
+	}
 	return;
 error:
 	wlr_log(L_ERROR, "Failed to set up default shaders!");
@@ -141,6 +152,28 @@ static bool wlr_gles3_render_surface(struct wlr_renderer_state *state,
 	return true;
 }
 
+static void wlr_gles3_render_quad(struct wlr_renderer_state *state,
+		const float (*color)[4], const float (*matrix)[16]) {
+	GL_CALL(glUseProgram(shaders.quad));
+	GL_CALL(glBindVertexArray(vao));
+	GL_CALL(glBindBuffer(GL_ARRAY_BUFFER, vbo));
+	GL_CALL(glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo));
+	GL_CALL(glUniformMatrix4fv(0, 1, GL_TRUE, *matrix));
+	GL_CALL(glUniform4f(1, (*color)[0], (*color)[1], (*color)[2], (*color)[3]));
+	GL_CALL(glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0));
+}
+
+static void wlr_gles3_render_ellipse(struct wlr_renderer_state *state,
+		const float (*color)[4], const float (*matrix)[16]) {
+	GL_CALL(glUseProgram(shaders.ellipse));
+	GL_CALL(glBindVertexArray(vao));
+	GL_CALL(glBindBuffer(GL_ARRAY_BUFFER, vbo));
+	GL_CALL(glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo));
+	GL_CALL(glUniformMatrix4fv(0, 1, GL_TRUE, *matrix));
+	GL_CALL(glUniform4f(1, (*color)[0], (*color)[1], (*color)[2], (*color)[3]));
+	GL_CALL(glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0));
+}
+
 static void wlr_gles3_destroy(struct wlr_renderer_state *state) {
 	// no-op
 }
@@ -150,6 +183,8 @@ static struct wlr_renderer_impl wlr_renderer_impl = {
 	.end = wlr_gles3_end,
 	.surface_init = wlr_gles3_surface_init,
 	.render_with_matrix = wlr_gles3_render_surface,
+	.render_quad = wlr_gles3_render_quad,
+	.render_ellipse = wlr_gles3_render_ellipse,
 	.destroy = wlr_gles3_destroy
 };
 

render/gles3/shaders.c

@@ -1,28 +1,63 @@
 #include "render/gles3.h"
 #include <GLES3/gl3.h>
 
+// Colored quads
+const GLchar quad_vertex_src[] =
+"uniform mat4 proj;"
+"uniform vec4 color;"
+"attribute vec2 pos;"
+"attribute vec2 texcoord;"
+"varying vec4 v_color;"
+"varying vec2 v_texcoord;"
+"void main() {"
+"  gl_Position = proj * vec4(pos, 0.0, 1.0);"
+"  v_color = color;"
+"  v_texcoord = texcoord;"
+"}";
+
+const GLchar quad_fragment_src[] =
+"precision mediump float;"
+"varying vec4 v_color;"
+"varying vec2 v_texcoord;"
+"void main() {"
+"  gl_FragColor = v_color;"
+"}";
+
+// Colored ellipses (TODO)
+
+const GLchar ellipse_fragment_src[] =
+"precision mediump float;"
+"varying vec4 v_color;"
+"varying vec2 v_texcoord;"
+"void main() {"
+"  float l = length(v_texcoord - vec2(0.5, 0.5));"
+"  if (l > 0.5) discard;"
+"  gl_FragColor = v_color;"
+"}";
+
+// Textured quads
 const GLchar vertex_src[] =
-"uniform mat4 proj;\n"
+"uniform mat4 proj;"
-"attribute vec2 pos;\n"
+"attribute vec2 pos;"
-"attribute vec2 texcoord;\n"
+"attribute vec2 texcoord;"
-"varying vec2 v_texcoord;\n"
+"varying vec2 v_texcoord;"
-"void main() {\n"
+"void main() {"
-"	gl_Position = proj * vec4(pos, 0.0, 1.0);\n"
+"	gl_Position = proj * vec4(pos, 0.0, 1.0);"
-"	v_texcoord = texcoord;\n"
+"	v_texcoord = texcoord;"
-"}\n";
+"}";
 
 const GLchar fragment_src_RGB[] =
-"precision mediump float;\n"
+"precision mediump float;"
-"varying vec2 v_texcoord;\n"
+"varying vec2 v_texcoord;"
-"uniform sampler2D tex;\n"
+"uniform sampler2D tex;"
-"void main() {\n"
+"void main() {"
-"	gl_FragColor = vec4(texture2D(tex, v_texcoord).rgb, 1.0);\n"
+"	gl_FragColor = vec4(texture2D(tex, v_texcoord).rgb, 1.0);"
-"}\n";
+"}";
 
 const GLchar fragment_src_RGBA[] =
-"precision mediump float;\n"
+"precision mediump float;"
-"varying vec2 v_texcoord;\n"
+"varying vec2 v_texcoord;"
-"uniform sampler2D tex;\n"
+"uniform sampler2D tex;"
-"void main() {\n"
+"void main() {"
-"	gl_FragColor = texture2D(tex, v_texcoord);\n"
+"	gl_FragColor = texture2D(tex, v_texcoord);"
-"}\n";
+"}";

render/wlr_renderer.c

@@ -31,3 +31,13 @@ bool wlr_render_with_matrix(struct wlr_renderer *r,
 		struct wlr_surface *surface, const float (*matrix)[16]) {
 	return r->impl->render_with_matrix(r->state, surface, matrix);
 }
+
+void wlr_render_colored_quad(struct wlr_renderer *r,
+		const float (*color)[4], const float (*matrix)[16]) {
+	r->impl->render_quad(r->state, color, matrix);
+}
+
+void wlr_render_colored_ellipse(struct wlr_renderer *r,
+		const float (*color)[4], const float (*matrix)[16]) {
+	r->impl->render_ellipse(r->state, color, matrix);
+}

session/logind.c

@@ -29,7 +29,6 @@ struct logind_session {
 
 static int logind_take_device(struct wlr_session *restrict base,
 		const char *restrict path) {
-
 	struct logind_session *session = wl_container_of(base, session, base);
 
 	int ret;

types/CMakeLists.txt

@@ -5,6 +5,11 @@ include_directories(
 
 add_library(wlr-types
     wlr_output.c
+    wlr_input_device.c
+    wlr_keyboard.c
+    wlr_pointer.c
+    wlr_touch.c
+    wlr_tablet_tool.c
 )
 
 target_link_libraries(wlr-types

types/wlr_input_device.c

@@ -0,0 +1,43 @@
+#define _XOPEN_SOURCE 500
+#include <stdlib.h>
+#include <string.h>
+#include <wayland-server.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "common/log.h"
+#include "types.h"
+
+struct wlr_input_device *wlr_input_device_create(
+		enum wlr_input_device_type type,
+		struct wlr_input_device_impl *impl,
+		struct wlr_input_device_state *state,
+		const char *name, int vendor, int product) {
+	struct wlr_input_device *dev = calloc(1, sizeof(struct wlr_input_device));
+	dev->type = type;
+	dev->impl = impl;
+	dev->state = state;
+	dev->name = strdup(name);
+	dev->vendor = vendor;
+	dev->product = product;
+	return dev;
+}
+
+void wlr_input_device_destroy(struct wlr_input_device *dev) {
+	if (!dev) return;
+	if (dev->impl && dev->impl->destroy && dev->state) {
+		dev->impl->destroy(dev->state);
+	}
+	if (dev->_device) {
+		switch (dev->type) {
+		case WLR_INPUT_DEVICE_KEYBOARD:
+			wlr_keyboard_destroy(dev->keyboard);
+			break;
+		default:
+			wlr_log(L_DEBUG, "Warning: leaking memory %p %p %d",
+					dev->_device, dev, dev->type);
+			break;
+		}
+	}
+	free(dev->name);
+	free(dev);
+}

types/wlr_keyboard.c

@@ -0,0 +1,23 @@
+#include <stdlib.h>
+#include <string.h>
+#include <wayland-server.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "types.h"
+
+struct wlr_keyboard *wlr_keyboard_create(struct wlr_keyboard_impl *impl,
+		struct wlr_keyboard_state *state) {
+	struct wlr_keyboard *kb = calloc(1, sizeof(struct wlr_keyboard));
+	kb->impl = impl;
+	kb->state = state;
+	wl_signal_init(&kb->events.key);
+	return kb;
+}
+
+void wlr_keyboard_destroy(struct wlr_keyboard *kb) {
+	if (!kb) return;
+	if (kb->impl) {
+		kb->impl->destroy(kb->state);
+	}
+	free(kb);
+}

types/wlr_output.c

@@ -91,6 +91,15 @@ void wlr_output_transform(struct wlr_output *output,
 	output->impl->transform(output->state, transform);
 }
 
+bool wlr_output_set_cursor(struct wlr_output *output,
+		const uint8_t *buf, int32_t stride, uint32_t width, uint32_t height) {
+	return output->impl->set_cursor(output->state, buf, stride, width, height);
+}
+
+bool wlr_output_move_cursor(struct wlr_output *output, int x, int y) {
+	return output->impl->move_cursor(output->state, x, y);
+}
+
 void wlr_output_destroy(struct wlr_output *output) {
 	if (!output) return;
 	output->impl->destroy(output->state);

types/wlr_pointer.c

@@ -0,0 +1,26 @@
+#include <stdlib.h>
+#include <string.h>
+#include <wayland-server.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "types.h"
+
+struct wlr_pointer *wlr_pointer_create(struct wlr_pointer_impl *impl,
+		struct wlr_pointer_state *state) {
+	struct wlr_pointer *pointer = calloc(1, sizeof(struct wlr_pointer));
+	pointer->impl = impl;
+	pointer->state = state;
+	wl_signal_init(&pointer->events.motion);
+	wl_signal_init(&pointer->events.motion_absolute);
+	wl_signal_init(&pointer->events.button);
+	wl_signal_init(&pointer->events.axis);
+	return pointer;
+}
+
+void wlr_pointer_destroy(struct wlr_pointer *pointer) {
+	if (!pointer) return;
+	if (pointer->impl) {
+		pointer->impl->destroy(pointer->state);
+	}
+	free(pointer);
+}

types/wlr_tablet_tool.c

@@ -0,0 +1,26 @@
+#include <stdlib.h>
+#include <string.h>
+#include <wayland-server.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "types.h"
+
+struct wlr_tablet_tool *wlr_tablet_tool_create(struct wlr_tablet_tool_impl *impl,
+		struct wlr_tablet_tool_state *state) {
+	struct wlr_tablet_tool *tool = calloc(1, sizeof(struct wlr_tablet_tool));
+	tool->impl = impl;
+	tool->state = state;
+	wl_signal_init(&tool->events.axis);
+	wl_signal_init(&tool->events.proximity);
+	wl_signal_init(&tool->events.tip);
+	wl_signal_init(&tool->events.button);
+	return tool;
+}
+
+void wlr_tablet_tool_destroy(struct wlr_tablet_tool *tool) {
+	if (!tool) return;
+	if (tool->impl) {
+		tool->impl->destroy(tool->state);
+	}
+	free(tool);
+}

types/wlr_touch.c

@@ -0,0 +1,26 @@
+#include <stdlib.h>
+#include <string.h>
+#include <wayland-server.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "types.h"
+
+struct wlr_touch *wlr_touch_create(struct wlr_touch_impl *impl,
+		struct wlr_touch_state *state) {
+	struct wlr_touch *touch = calloc(1, sizeof(struct wlr_touch));
+	touch->impl = impl;
+	touch->state = state;
+	wl_signal_init(&touch->events.down);
+	wl_signal_init(&touch->events.up);
+	wl_signal_init(&touch->events.motion);
+	wl_signal_init(&touch->events.cancel);
+	return touch;
+}
+
+void wlr_touch_destroy(struct wlr_touch *touch) {
+	if (!touch) return;
+	if (touch->impl) {
+		touch->impl->destroy(touch->state);
+	}
+	free(touch);
+}