Adding a Wayland basic toolkit

ui/wayland/wayland_screen.h

+// Copyright (c) 2011 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 WAYLAND_SCREEN_H_
+#define WAYLAND_SCREEN_H_
+
+#include <list>
+#include <stdint.h>
+
+#include "base/basictypes.h"
+#include "wayland_geometry_utils.h"
+
+struct wl_output;
+struct wl_output_listener;
+
+class WaylandDisplay;
+
+/* WaylandScreen objects keep track of the current outputs (screens/monitors)
+that are available to the application.
+*/
+class WaylandScreen {
+ public:
+  WaylandScreen(WaylandDisplay* display, uint32_t id);
+  ~WaylandScreen();
+
+  /* Returns the active allocation of the screen. */
+  Rectangle GetAllocation() const;
+
+ private:
+  /* Used to store information regarding the available modes for the current
+  screen.
+   - (width, height): is the resolution of the screen
+   - refresh: is the refresh rate of the screen under this mode
+   - flags: contains extra information regarding the mode. The most important
+            is the active mode flag.
+  */
+  struct Mode {
+    int32_t width, height, refresh, flags;
+  };
+
+  /* The Wayland output this object wraps */
+  wl_output* output_;
+  /* The display that the output is associated with */
+  WaylandDisplay* display_;
+  /* The position of the screen. This is important in multi monitor display
+  since it provides the position of the screen in the virtual screen.
+  */
+  Point position_;
+
+  /* List of supported modes */
+  typedef std::list<Mode> Modes;
+  Modes modes_;
+
+  static const wl_output_listener output_listener;
+
+  /* Callback functions that allows the display to initialize the screen's
+  position and available modes.
+  */
+  static void OutputHandleGeometry(void* data,
+                                   wl_output* output,
+                                   int32_t x,
+                                   int32_t y,
+                                   int32_t physical_width,
+                                   int32_t physical_height,
+                                   int32_t subpixel,
+                                   const char* make,
+                                   const char* model);
+  static void OutputHandleMode(void* data,
+                               wl_output* wl_output,
+                               uint32_t flags,
+                               int32_t width,
+                               int32_t height,
+                               int32_t refresh);
+
+  DISALLOW_COPY_AND_ASSIGN(WaylandScreen);
+};
+
+#endif