bb935aa5de
QPainter won't let paint with a device pixel ratio less than 1. There are used to be workarounds to force a device pixel ratio of 1, but they were removed with fractional scaling corner fix. This change makes sure that the decoration renderer forces a device pixel ratio of 1 if the output's scale factor is less than 1 so calculated texture coordinates match where window borders are rendered in the texture atlas. BUG: 449681
101 lines
2.2 KiB
C++
101 lines
2.2 KiB
C++
/*
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SPDX-FileCopyrightText: 2021 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#pragma once
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#include "item.h"
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namespace KDecoration2
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{
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class Decoration;
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}
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namespace KWin
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{
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class AbstractClient;
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class Deleted;
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class Toplevel;
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namespace Decoration
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{
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class DecoratedClientImpl;
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}
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class KWIN_EXPORT DecorationRenderer : public QObject
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{
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Q_OBJECT
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public:
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virtual void render(const QRegion ®ion) = 0;
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void invalidate();
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// TODO: Move damage tracking inside DecorationItem.
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QRegion damage() const;
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void addDamage(const QRegion ®ion);
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void resetDamage();
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qreal effectiveDevicePixelRatio() const;
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qreal devicePixelRatio() const;
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void setDevicePixelRatio(qreal dpr);
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// Reserve some space for padding. We pad decoration parts to avoid texture bleeding.
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static const int TexturePad = 1;
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Q_SIGNALS:
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void damaged(const QRegion ®ion);
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protected:
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explicit DecorationRenderer(Decoration::DecoratedClientImpl *client);
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Decoration::DecoratedClientImpl *client() const;
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bool areImageSizesDirty() const {
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return m_imageSizesDirty;
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}
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void resetImageSizesDirty() {
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m_imageSizesDirty = false;
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}
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QImage renderToImage(const QRect &geo);
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void renderToPainter(QPainter *painter, const QRect &rect);
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private:
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QPointer<Decoration::DecoratedClientImpl> m_client;
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QRegion m_damage;
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qreal m_devicePixelRatio = 1;
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bool m_imageSizesDirty;
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};
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/**
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* The DecorationItem class represents a server-side decoration.
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*/
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class KWIN_EXPORT DecorationItem : public Item
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{
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Q_OBJECT
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public:
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explicit DecorationItem(KDecoration2::Decoration *decoration, AbstractClient *window, Item *parent = nullptr);
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DecorationRenderer *renderer() const;
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private Q_SLOTS:
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void handleFrameGeometryChanged();
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void handleWindowClosed(Toplevel *original, Deleted *deleted);
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void handleOutputChanged();
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void handleOutputScaleChanged();
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protected:
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void preprocess() override;
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WindowQuadList buildQuads() const override;
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private:
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Toplevel *m_window;
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QPointer<AbstractOutput> m_output;
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QPointer<KDecoration2::Decoration> m_decoration;
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QScopedPointer<DecorationRenderer> m_renderer;
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};
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} // namespace KWin
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