invert.h

Go to the documentation of this file.

/*
    KWin - the KDE window manager
    This file is part of the KDE project.
 
    SPDX-FileCopyrightText: 2007 Rivo Laks <rivolaks@hot.ee>
    SPDX-FileCopyrightText: 2008 Lucas Murray <lmurray@undefinedfire.com>
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
 
#pragma once
 
#include "effect/offscreeneffect.h"
 
namespace KWin
{
 
class GLShader;
 
class InvertEffect : public OffscreenEffect
{
    Q_OBJECT
public:
    InvertEffect();
    ~InvertEffect() override;
 
    bool isActive() const override;
    bool provides(Feature) override;
    int requestedEffectChainPosition() const override;
 
    static bool supported();
 
public Q_SLOTS:
    void toggleScreenInversion();
    void toggleWindow();
 
    void slotWindowAdded(KWin::EffectWindow *w);
    void slotWindowClosed(KWin::EffectWindow *w);
 
protected:
    bool loadData();
 
private:
    bool isInvertable(EffectWindow *window) const;
    void invert(EffectWindow *window);
    void uninvert(EffectWindow *window);
 
    bool m_inited;
    bool m_valid;
    std::unique_ptr<GLShader> m_shader;
    bool m_allWindows;
    QList<EffectWindow *> m_windows;
};
 
inline int InvertEffect::requestedEffectChainPosition() const
{
    return 99;
}
 
} // namespace