811beb94e0
The Xrender backend was added at the time when OpenGL drivers were not particularly stable. Nowadays though, it's a totally different situation. The OpenGL render backend has been the default one for many years. It's quite stable, and it allows implementing many advanced features that other render backends don't. Many features are not tested with it during the development cycle; the only time when it is noticed is when changes in other parts of kwin break the build in the xrender backend. Effectively, the xrender backend is unmaintained nowadays. Given that the xrender backend is effectively unmaintained and our focus being shifted towards wayland, this change drops the xrender backend in favor of the opengl backend. Besides being de-facto unmaintained, another issue is that QtQuick does not support and most likely will never support the Xrender API. This poses a problem as we want thumbnail items to be natively integrated in the qtquick scene graph.
88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
/*
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KWin - the KDE window manager
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This file is part of the KDE project.
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SPDX-FileCopyrightText: 2012 Filip Wieladek <wattos@gmail.com>
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SPDX-FileCopyrightText: 2016 Martin Gräßlin <mgraesslin@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef KWIN_TOUCHPOINTS_H
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#define KWIN_TOUCHPOINTS_H
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#include <kwineffects.h>
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namespace KWin
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{
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class TouchPointsEffect
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: public Effect
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{
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Q_OBJECT
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Q_PROPERTY(qreal lineWidth READ lineWidth)
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Q_PROPERTY(int ringLife READ ringLife)
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Q_PROPERTY(int ringSize READ ringSize)
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Q_PROPERTY(int ringCount READ ringCount)
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public:
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TouchPointsEffect();
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~TouchPointsEffect() override;
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void prePaintScreen(ScreenPrePaintData& data, std::chrono::milliseconds presentTime) override;
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void paintScreen(int mask, const QRegion ®ion, ScreenPaintData& data) override;
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void postPaintScreen() override;
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bool isActive() const override;
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bool touchDown(qint32 id, const QPointF &pos, quint32 time) override;
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bool touchMotion(qint32 id, const QPointF &pos, quint32 time) override;
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bool touchUp(qint32 id, quint32 time) override;
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// for properties
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qreal lineWidth() const {
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return m_lineWidth;
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}
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int ringLife() const {
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return m_ringLife;
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}
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int ringSize() const {
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return m_ringMaxSize;
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}
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int ringCount() const {
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return m_ringCount;
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}
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private:
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inline void drawCircle(const QColor& color, float cx, float cy, float r);
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inline void paintScreenSetup(int mask, QRegion region, ScreenPaintData& data);
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inline void paintScreenFinish(int mask, QRegion region, ScreenPaintData& data);
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void repaint();
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float computeAlpha(int time, int ring);
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float computeRadius(int time, bool press, int ring);
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void drawCircleGl(const QColor& color, float cx, float cy, float r);
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void drawCircleQPainter(const QColor& color, float cx, float cy, float r);
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void paintScreenSetupGl(int mask, QRegion region, ScreenPaintData& data);
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void paintScreenFinishGl(int mask, QRegion region, ScreenPaintData& data);
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Qt::GlobalColor colorForId(quint32 id);
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int m_ringCount = 2;
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float m_lineWidth = 1.0;
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int m_ringLife = 300;
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float m_ringMaxSize = 20.0;
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struct TouchPoint {
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QPointF pos;
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int time = 0;
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bool press;
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QColor color;
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};
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QVector<TouchPoint> m_points;
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QHash<quint32, QPointF> m_latestPositions;
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QHash<quint32, Qt::GlobalColor> m_colors;
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std::chrono::milliseconds m_lastPresentTime = std::chrono::milliseconds::zero();
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};
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} // namespace
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#endif
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