chromium/ui/ozone/public/platform_screen.h

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_OZONE_PUBLIC_PLATFORM_SCREEN_H_
#define UI_OZONE_PUBLIC_PLATFORM_SCREEN_H_

#include <optional>
#include <set>
#include <string>
#include <vector>

#include "base/component_export.h"
#include "base/values.h"
#include "build/chromeos_buildflags.h"
#include "ui/gfx/gpu_extra_info.h"
#include "ui/gfx/native_widget_types.h"

namespace base {
class TimeDelta;
}  // namespace base

namespace display {
class Display;
class DisplayObserver;
enum class TabletState;
}  // namespace display

namespace gfx {
class Point;
class Rect;
}  // namespace gfx

namespace ui {

// PlatformScreen is an abstract base class for an interface to an Ozone
// platform's functionality exposed to Chrome via display::Screen.
//
// Additionally, may notify DisplayObservers with global workspace changes.
//
// Recall that in Chrome, a |Screen| is the union of all attached |Display|
// instances. The |Screen|'s coordinate system is in DIP pixels (so that
// it can reasonably support |Display|s of differing pixel densities.) The
// |Screen|'s origin is the top-left corner of the primary |Display| in the
// |Screen|. Coordinates increase down and to the right.
//
// TODO(rjkroege): Add ascii art?
class COMPONENT_EXPORT(OZONE_BASE) PlatformScreen { … };

}  // namespace ui

#endif  // UI_OZONE_PUBLIC_PLATFORM_SCREEN_H_