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// Copyright 2014 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_OVERLAY_CANDIDATES_OZONE_H_
#define UI_OZONE_PUBLIC_OVERLAY_CANDIDATES_OZONE_H_
#include <vector>
#include "base/component_export.h"
#include "ui/ozone/public/hardware_capabilities.h"
#include "ui/ozone/public/overlay_surface_candidate.h"
namespace ui {
// This class can be used to answer questions about possible overlay
// configurations for a particular output device. We get an instance of this
// class from SurfaceFactoryOzone given an AcceleratedWidget.
class COMPONENT_EXPORT(OZONE_BASE) OverlayCandidatesOzone {
public:
using OverlaySurfaceCandidateList = std::vector<OverlaySurfaceCandidate>;
// A list of possible overlay candidates is presented to this function.
// The expected result is that those candidates that can be in a separate
// plane are marked with |overlay_handled| set to true, otherwise they are
// to be traditionally composited. When setting |overlay_handled| to true,
// the implementation must also snap |display_rect| to integer coordinates
// if necessary.
virtual void CheckOverlaySupport(OverlaySurfaceCandidateList* surfaces);
// Register `receive_callback` to be called with the latest
// HardwareCapbalitites, whenever displays are configured.
// `receive_callback` may be called once after OverlayCandidatesOzone is
// destroyed if there is an in-flight callback, so it should be bound with a
// WeakPtr.
virtual void ObserveHardwareCapabilities(
ui::HardwareCapabilitiesCallback receive_callback);
// This should be invoked during overlay processing to indicate if there are
// any candidates for this processor that have an overlay requirement.
virtual void RegisterOverlayRequirement(bool requires_overlay) {}
virtual ~OverlayCandidatesOzone();
};
} // namespace ui
#endif // UI_OZONE_PUBLIC_OVERLAY_CANDIDATES_OZONE_H_
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