File indexing completed on 2024-11-10 04:57:02 

0001 /*
0002     KWin - the KDE window manager
0003     This file is part of the KDE project.
0004 
0005     SPDX-FileCopyrightText: 2007 Lubos Lunak <l.lunak@kde.org>
0006     SPDX-FileCopyrightText: 2011 Martin Gräßlin <mgraesslin@kde.org>
0007 
0008     SPDX-License-Identifier: GPL-2.0-or-later
0009 */
0010 
0011 #pragma once
0012 
0013 #include "effect/effect.h"
0014 
0015 namespace KWin
0016 {
0017 
0018 class GLFramebuffer;
0019 class GLTexture;
0020 
0021 class MagnifierEffect : public Effect
0022 {
0023     Q_OBJECT
0024     Q_PROPERTY(QSize magnifierSize READ magnifierSize)
0025     Q_PROPERTY(qreal targetZoom READ targetZoom)
0026 public:
0027     MagnifierEffect();
0028     ~MagnifierEffect() override;
0029     void reconfigure(ReconfigureFlags) override;
0030     void prePaintScreen(ScreenPrePaintData &data, std::chrono::milliseconds presentTime) override;
0031     void paintScreen(const RenderTarget &renderTarget, const RenderViewport &viewport, int mask, const QRegion &region, Output *screen) override;
0032     void postPaintScreen() override;
0033     bool isActive() const override;
0034     static bool supported();
0035 
0036     // for properties
0037     QSize magnifierSize() const;
0038     qreal targetZoom() const;
0039 private Q_SLOTS:
0040     void zoomIn();
0041     void zoomOut();
0042     void toggle();
0043     void slotMouseChanged(const QPointF &pos, const QPointF &old,
0044                           Qt::MouseButtons buttons, Qt::MouseButtons oldbuttons,
0045                           Qt::KeyboardModifiers modifiers, Qt::KeyboardModifiers oldmodifiers);
0046     void slotWindowAdded(EffectWindow *w);
0047     void slotWindowDamaged();
0048 
0049 private:
0050     QRect magnifierArea(QPointF pos = cursorPos()) const;
0051     double m_zoom;
0052     double m_targetZoom;
0053     bool m_polling; // Mouse polling
0054     std::chrono::milliseconds m_lastPresentTime;
0055     QSize m_magnifierSize;
0056     std::unique_ptr<GLTexture> m_texture;
0057     std::unique_ptr<GLFramebuffer> m_fbo;
0058 };
0059 
0060 } // namespace