IMotionClock.h

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// SPDX-FileCopyrightText: 2026 fuddlesworth
// SPDX-License-Identifier: LGPL-2.1-or-later
 
#pragma once
 
#include <PhosphorAnimation/phosphoranimation_export.h>
 
#include <QtGlobal>
 
#include <chrono>
 
namespace PhosphorAnimation {
 
class PHOSPHORANIMATION_EXPORT IMotionClock
{
public:
    virtual ~IMotionClock() = default;
 
    IMotionClock(const IMotionClock&) = delete;
    IMotionClock& operator=(const IMotionClock&) = delete;
    IMotionClock(IMotionClock&&) = delete;
    IMotionClock& operator=(IMotionClock&&) = delete;
 
    virtual std::chrono::nanoseconds now() const = 0;
 
    virtual qreal refreshRate() const = 0;
 
    virtual void requestFrame() = 0;
 
    virtual const void* epochIdentity() const
    {
        return nullptr;
    }
 
    static const void* steadyClockEpoch();
 
    static bool epochCompatible(const IMotionClock* a, const IMotionClock* b)
    {
        if (!a || !b) {
            return false;
        }
        const void* epochA = a->epochIdentity();
        const void* epochB = b->epochIdentity();
        return epochA && epochA == epochB;
    }
 
protected:
    IMotionClock() = default;
};
 
} // namespace PhosphorAnimation