Flesh out wayland backend somewhat, add example

include/wlr/backend.h

@@ -0,0 +1,7 @@
+#ifndef _WLR_BACKEND_H
+#define _WLR_BACKEND_H
+
+struct wlr_backend *wlr_backend_init();
+void wlr_backend_free(struct wlr_backend *backend);
+
+#endif

include/wlr/backend/wayland.h

@@ -0,0 +1,14 @@
+#ifndef _WLR_BACKEND_WAYLAND_INTERNAL_H
+#define _WLR_BACKEND_WAYLAND_INTERNAL_H
+
+#include <wayland-client.h>
+#include <wayland-server.h>
+#include <wlr/wayland.h>
+
+struct wlr_wl_backend;
+
+void wlr_wl_backend_free(struct wlr_wl_backend *backend);
+struct wlr_wl_backend *wlr_wl_backend_init(struct wl_display *display,
+		size_t outputs);
+
+#endif

include/wlr/common/list.h

@@ -0,0 +1,31 @@
+#ifndef _WLR_LIST_H
+#define _WLR_LIST_H
+
+#include <stddef.h>
+
+typedef struct {
+	size_t capacity;
+	size_t length;
+	void **items;
+} list_t;
+
+list_t *list_create(void);
+void list_free(list_t *list);
+void list_foreach(list_t *list, void (*callback)(void* item));
+void list_add(list_t *list, void *item);
+void list_push(list_t *list, void *item);
+void list_insert(list_t *list, size_t index, void *item);
+void list_del(list_t *list, size_t index);
+void *list_pop(list_t *list);
+void *list_peek(list_t *list);
+void list_cat(list_t *list, list_t *source);
+// See qsort. Remember to use *_qsort functions as compare functions,
+// because they dereference the left and right arguments first!
+void list_qsort(list_t *list, int compare(const void *left, const void *right));
+// Return index for first item in list that returns 0 for given compare
+// function or -1 if none matches.
+int list_seq_find(list_t *list,
+		int compare(const void *item, const void *cmp_to),
+		const void *cmp_to);
+
+#endif

include/wlr/common/log.h

@@ -0,0 +1,16 @@
+#ifndef _WLR_COMMON_LOG_H
+#define _WLR_COMMON_LOG_H
+#include <stdbool.h>
+
+typedef enum {
+	L_SILENT = 0,
+	L_ERROR = 1,
+	L_INFO = 2,
+	L_DEBUG = 3,
+} log_importance_t;
+
+typedef void (*log_callback_t)(log_importance_t importance, const char *fmt, va_list args);
+
+void init_log(log_callback_t callback);
+
+#endif

include/wlr/wayland.h

@@ -0,0 +1,32 @@
+#ifndef _WLR_WAYLAND_H
+#define _WLR_WAYLAND_H
+
+#include <wayland-server.h>
+#include <wlr/common/list.h>
+
+struct wlr_wl_seat {
+	struct wl_seat *wl_seat;
+	uint32_t capabilities;
+	const char *name;
+	list_t *outputs;
+	list_t *pointers;
+};
+
+struct wlr_wl_output {
+	struct wl_output *wl_output;
+	uint32_t flags;
+	uint32_t width, height;
+	uint32_t scale;
+};
+
+struct wlr_wl_keyboard {
+	struct wl_keyboard *wl_keyboard;
+};
+
+struct wlr_wl_pointer {
+	struct wl_pointer *wl_pointer;
+	struct wl_surface *current_surface;
+	wl_fixed_t x, y;
+};
+
+#endif