ui/ozone/platform/wayland/wayland_output.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_OUTPUT_H_
#define UI_OZONE_PLATFORM_WAYLAND_WAYLAND_OUTPUT_H_

#include <stdint.h>

#include "ui/display/types/display_snapshot.h"
#include "ui/display/types/native_display_delegate.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/ozone/platform/wayland/wayland_object.h"

namespace ui {

// WaylandOutput objects keep track of the current output of display
// that are available to the application.
class WaylandOutput {
 public:
  class Observer {
   public:
    // Will be called when wl_output is available.
    virtual void OnOutputReadyForUse() = 0;
  };

  WaylandOutput(const int64_t display_id, wl_output* output);
  ~WaylandOutput();

  void SetObserver(Observer* observer);
  Observer* observer() { return observer_; }

  bool is_ready() const { return !!current_mode_; }

  void GetDisplaysSnapshot(display::GetDisplaysCallback callback);

 private:
  // Callback functions used for setting geometric properties of the output
  // 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,
                                   int32_t output_transform);

  static void OutputHandleMode(void* data,
                               wl_output* wl_output,
                               uint32_t flags,
                               int32_t width,
                               int32_t height,
                               int32_t refresh);

  const int64_t display_id_ = 0;
  wl::Object<wl_output> output_;

  Observer* observer_;

  std::unique_ptr<display::DisplaySnapshot> current_snapshot_;
  std::unique_ptr<display::DisplayMode> current_mode_;

  DISALLOW_COPY_AND_ASSIGN(WaylandOutput);
};

}  // namespace ui

#endif  // UI_OZONE_PLATFORM_WAYLAND_WAYLAND_SCREEN_H_