ed113171f3
The results of the blur and the background contrast effect will never be seen if the screen locker is active. In order to avoid wasting computational resources, we could temporarily disable the blur effect until the screen is unlocked. Furthermore, given that the blur effect shrinks the clip region, it is guaranteed that the compositor will have to render the desktop window behind the lockscreen window. With this change, all windows behind the screen locker will be properly clipped away.
134 lines
3.9 KiB
C++
134 lines
3.9 KiB
C++
/*
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SPDX-FileCopyrightText: 2010 Fredrik Höglund <fredrik@kde.org>
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SPDX-FileCopyrightText: 2018 Alex Nemeth <alex.nemeth329@gmail.com>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef BLUR_H
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#define BLUR_H
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#include <kwineffects.h>
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#include <kwinglplatform.h>
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#include <kwinglutils.h>
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#include <QVector>
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#include <QVector2D>
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#include <QStack>
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namespace KWaylandServer
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{
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class BlurManagerInterface;
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}
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namespace KWin
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{
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static const int borderSize = 5;
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class BlurShader;
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class BlurEffect : public KWin::Effect
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{
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Q_OBJECT
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public:
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BlurEffect();
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~BlurEffect() override;
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static bool supported();
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static bool enabledByDefault();
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void reconfigure(ReconfigureFlags flags) override;
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void prePaintScreen(ScreenPrePaintData &data, int time) override;
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void prePaintWindow(EffectWindow* w, WindowPrePaintData& data, int time) override;
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void drawWindow(EffectWindow *w, int mask, const QRegion ®ion, WindowPaintData &data) override;
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void paintEffectFrame(EffectFrame *frame, const QRegion ®ion, double opacity, double frameOpacity) override;
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bool provides(Feature feature) override;
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bool isActive() const override;
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int requestedEffectChainPosition() const override {
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return 75;
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}
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bool eventFilter(QObject *watched, QEvent *event) override;
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public Q_SLOTS:
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void slotWindowAdded(KWin::EffectWindow *w);
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void slotWindowDeleted(KWin::EffectWindow *w);
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void slotPropertyNotify(KWin::EffectWindow *w, long atom);
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void slotScreenGeometryChanged();
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private:
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QRect expand(const QRect &rect) const;
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QRegion expand(const QRegion ®ion) const;
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bool renderTargetsValid() const;
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void deleteFBOs();
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void initBlurStrengthValues();
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void updateTexture();
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QRegion blurRegion(const EffectWindow *w) const;
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bool shouldBlur(const EffectWindow *w, int mask, const WindowPaintData &data) const;
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void updateBlurRegion(EffectWindow *w) const;
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void doBlur(const QRegion &shape, const QRect &screen, const float opacity, const QMatrix4x4 &screenProjection, bool isDock, QRect windowRect);
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void uploadRegion(QVector2D *&map, const QRegion ®ion, const int downSampleIterations);
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void uploadGeometry(GLVertexBuffer *vbo, const QRegion &blurRegion, const QRegion &windowRegion);
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void generateNoiseTexture();
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void upscaleRenderToScreen(GLVertexBuffer *vbo, int vboStart, int blurRectCount, QMatrix4x4 screenProjection, QPoint windowPosition);
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void downSampleTexture(GLVertexBuffer *vbo, int blurRectCount);
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void upSampleTexture(GLVertexBuffer *vbo, int blurRectCount);
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void copyScreenSampleTexture(GLVertexBuffer *vbo, int blurRectCount, QRegion blurShape, QMatrix4x4 screenProjection);
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private:
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BlurShader *m_shader;
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QVector <GLRenderTarget*> m_renderTargets;
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QVector <GLTexture> m_renderTextures;
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QStack <GLRenderTarget*> m_renderTargetStack;
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GLTexture m_noiseTexture;
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bool m_renderTargetsValid;
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long net_wm_blur_region;
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QRegion m_paintedArea; // keeps track of all painted areas (from bottom to top)
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QRegion m_currentBlur; // keeps track of the currently blured area of the windows(from bottom to top)
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int m_downSampleIterations; // number of times the texture will be downsized to half size
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int m_offset;
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int m_expandSize;
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int m_noiseStrength;
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int m_scalingFactor;
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struct OffsetStruct {
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float minOffset;
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float maxOffset;
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int expandSize;
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};
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QVector <OffsetStruct> blurOffsets;
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struct BlurValuesStruct {
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int iteration;
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float offset;
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};
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QVector <BlurValuesStruct> blurStrengthValues;
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QMap <EffectWindow*, QMetaObject::Connection> windowBlurChangedConnections;
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KWaylandServer::BlurManagerInterface *m_blurManager = nullptr;
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};
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inline
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bool BlurEffect::provides(Effect::Feature feature)
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{
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if (feature == Blur) {
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return true;
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}
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return KWin::Effect::provides(feature);
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}
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} // namespace KWin
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#endif
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