60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
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/*
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SPDX-FileCopyrightText: 2023 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#pragma once
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#include "kwin_export.h"
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#include <QObject>
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namespace KWin
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{
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/**
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* The GraphicsBuffer class represents a chunk of memory containing graphics data.
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*
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* A graphics buffer can be referenced. In which case, it won't be destroyed until all
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* references are dropped. You can use the isDropped() function to check whether the
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* buffer has been marked as destroyed.
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*/
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class KWIN_EXPORT GraphicsBuffer : public QObject
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{
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Q_OBJECT
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public:
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explicit GraphicsBuffer(QObject *parent = nullptr);
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/**
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* This enum type is used to specify the corner where the origin is. That is, the
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* buffer corner where 0,0 is located.
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*/
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enum class Origin {
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TopLeft,
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BottomLeft,
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};
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bool isReferenced() const;
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bool isDropped() const;
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void ref();
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void unref();
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void drop();
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virtual QSize size() const = 0;
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virtual bool hasAlphaChannel() const = 0;
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virtual Origin origin() const = 0;
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Q_SIGNALS:
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void released();
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void dropped();
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protected:
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int m_refCount = 0;
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bool m_dropped = false;
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};
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} // namespace KWin
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