openglbackend.h

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/*
    KWin - the KDE window manager
    This file is part of the KDE project.
 
    SPDX-FileCopyrightText: 2006 Lubos Lunak <l.lunak@kde.org>
    SPDX-FileCopyrightText: 2009, 2010, 2011 Martin Gräßlin <mgraesslin@kde.org>
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
#pragma once
 
#include "core/renderbackend.h"
 
#include <QRegion>
#include <memory>
 
namespace KWin
{
class Output;
class OpenGLBackend;
class GLTexture;
 
class KWIN_EXPORT OpenGLBackend : public RenderBackend
{
    Q_OBJECT
 
public:
    OpenGLBackend();
    virtual ~OpenGLBackend();
 
    virtual void init() = 0;
    CompositingType compositingType() const override final;
    bool checkGraphicsReset() override final;
 
    virtual bool makeCurrent() = 0;
    virtual void doneCurrent() = 0;
 
    bool isFailed() const
    {
        return m_failed;
    }
 
    bool supportsBufferAge() const
    {
        return m_haveBufferAge;
    }
 
    bool supportsNativeFence() const
    {
        return m_haveNativeFence;
    }
 
    QList<QByteArray> extensions() const
    {
        return m_extensions;
    }
 
    bool hasExtension(const QByteArray &extension) const
    {
        return m_extensions.contains(extension);
    }
 
    void copyPixels(const QRegion &region, const QSize &screenSize);
 
    virtual std::pair<std::shared_ptr<GLTexture>, ColorDescription> textureForOutput(Output *output) const;
 
protected:
    void setFailed(const QString &reason);
 
    void setSupportsBufferAge(bool value)
    {
        m_haveBufferAge = value;
    }
 
    void setSupportsNativeFence(bool value)
    {
        m_haveNativeFence = value;
    }
 
    void setExtensions(const QList<QByteArray> &extensions)
    {
        m_extensions = extensions;
    }
 
private:
    bool m_haveBufferAge;
    bool m_haveNativeFence = false;
    bool m_failed;
    QList<QByteArray> m_extensions;
};
 
}