Add initial SHM-only Wayland Ozone implementation

ui/ozone/platform/wayland/wayland_object.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_OZONE_PLATFORM_WAYLAND_WAYLAND_OBJECT_H_
+#define UI_OZONE_PLATFORM_WAYLAND_WAYLAND_OBJECT_H_
+
+#include <wayland-client.h>
+#include <xdg-shell-unstable-v5-client-protocol.h>
+
+#include "base/memory/scoped_ptr.h"
+
+namespace wl {
+
+template <typename T>
+struct ObjectTraits;
+
+template <>
+struct ObjectTraits<wl_buffer> {
+  static constexpr const wl_interface* interface = &wl_buffer_interface;
+  static constexpr void (*deleter)(wl_buffer*) = &wl_buffer_destroy;
+};
+
+template <>
+struct ObjectTraits<wl_compositor> {
+  static constexpr const wl_interface* interface = &wl_compositor_interface;
+  static constexpr void (*deleter)(wl_compositor*) = &wl_compositor_destroy;
+};
+
+template <>
+struct ObjectTraits<wl_display> {
+  static constexpr const wl_interface* interface = &wl_display_interface;
+  static constexpr void (*deleter)(wl_display*) = &wl_display_disconnect;
+};
+
+template <>
+struct ObjectTraits<wl_registry> {
+  static constexpr const wl_interface* interface = &wl_registry_interface;
+  static constexpr void (*deleter)(wl_registry*) = &wl_registry_destroy;
+};
+
+template <>
+struct ObjectTraits<wl_shm> {
+  static constexpr const wl_interface* interface = &wl_shm_interface;
+  static constexpr void (*deleter)(wl_shm*) = &wl_shm_destroy;
+};
+
+template <>
+struct ObjectTraits<wl_shm_pool> {
+  static constexpr const wl_interface* interface = &wl_shm_pool_interface;
+  static constexpr void (*deleter)(wl_shm_pool*) = &wl_shm_pool_destroy;
+};
+
+template <>
+struct ObjectTraits<wl_surface> {
+  static constexpr const wl_interface* interface = &wl_surface_interface;
+  static constexpr void (*deleter)(wl_surface*) = &wl_surface_destroy;
+};
+
+template <>
+struct ObjectTraits<xdg_shell> {
+  static constexpr const wl_interface* interface = &xdg_shell_interface;
+  static constexpr void (*deleter)(xdg_shell*) = &xdg_shell_destroy;
+};
+
+template <>
+struct ObjectTraits<xdg_surface> {
+  static constexpr const wl_interface* interface = &xdg_surface_interface;
+  static constexpr void (*deleter)(xdg_surface*) = &xdg_surface_destroy;
+};
+
+struct Deleter {
+  template <typename T>
+  void operator()(T* obj) {
+    ObjectTraits<T>::deleter(obj);
+  }
+};
+
+template <typename T>
+class Object : public scoped_ptr<T, Deleter> {
+ public:
+  Object() {}
+  explicit Object(T* obj) : scoped_ptr<T, Deleter>(obj) {}
+
+  uint32_t id() {
+    return wl_proxy_get_id(
+        reinterpret_cast<wl_proxy*>(scoped_ptr<T, Deleter>::get()));
+  }
+};
+
+template <typename T>
+wl::Object<T> Bind(wl_registry* registry, uint32_t name, uint32_t version) {
+  return wl::Object<T>(static_cast<T*>(
+      wl_registry_bind(registry, name, ObjectTraits<T>::interface, version)));
+}
+
+}  // namespace wl
+
+#endif  // UI_OZONE_PLATFORM_WAYLAND_WAYLAND_OBJECT_H_