outputbackend.h

Go to the documentation of this file.

/*
    KWin - the KDE window manager
    This file is part of the KDE project.
 
    SPDX-FileCopyrightText: 2015 Martin Gräßlin <mgraesslin@kde.org>
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
 
#pragma once
 
#include "effect/globals.h"
#include <epoxy/egl.h>
#include <kwin_export.h>
 
#include <QObject>
 
#include <memory>
#include <optional>
 
namespace KWin
{
 
class Output;
class InputBackend;
class OpenGLBackend;
class QPainterBackend;
class OutputConfiguration;
class EglDisplay;
class Session;
 
class KWIN_EXPORT Outputs : public QList<Output *>
{
public:
    Outputs(){};
    template<typename T>
    Outputs(const QList<T> &other)
    {
        resize(other.size());
        std::copy(other.constBegin(), other.constEnd(), begin());
    }
};
 
class KWIN_EXPORT OutputBackend : public QObject
{
    Q_OBJECT
public:
    ~OutputBackend() override;
 
    virtual bool initialize() = 0;
    virtual std::unique_ptr<InputBackend> createInputBackend();
    virtual std::unique_ptr<OpenGLBackend> createOpenGLBackend();
    virtual std::unique_ptr<QPainterBackend> createQPainterBackend();
 
    virtual EglDisplay *sceneEglDisplayObject() const = 0;
    ::EGLContext sceneEglGlobalShareContext() const;
    void setSceneEglGlobalShareContext(::EGLContext context);
 
    virtual QList<CompositingType> supportedCompositors() const = 0;
 
    virtual Outputs outputs() const = 0;
    Output *findOutput(const QString &name) const;
 
    virtual QString supportInformation() const;
 
    virtual Output *createVirtualOutput(const QString &name, const QSize &size, qreal scale);
    virtual void removeVirtualOutput(Output *output);
 
    virtual bool applyOutputChanges(const OutputConfiguration &config);
 
    virtual Session *session() const;
 
public Q_SLOTS:
    virtual void sceneInitialized(){};
 
Q_SIGNALS:
    void outputsQueried();
    void outputAdded(Output *output);
    void outputRemoved(Output *output);
 
protected:
    explicit OutputBackend(QObject *parent = nullptr);
 
    ::EGLContext m_globalShareContext = EGL_NO_CONTEXT;
};
 
} // namespace KWin