403a04fe24
Xcursors don't support hidpi so if a hidpi cursor is needed, kwin will scale the desired size by the scale factor and ask Xcursor helpers to load a theme with the given name and the size. However, the theme loading code doesn't take into account that Xcursor theme loading helpers may not return cursor sprites of size size * scale if the theme has no such a size. For example, if the cursor theme only provides 24, 36, and 48 sizes and kwin attempts to load cursors of size 48 with a scale factor of 2, we will get cursors of size 48 instead of 96. Unfortunately, this will result in the issue where the cursor shrinks when hovering decorations because kwin doesn't know that the effective scale factor (1) is different from the requested scale factor (2). In order to fix loading of HiDPI cursors, we need to approximate the effective scale factor of every cursor sprite as we load it.
124 lines
2.9 KiB
C++
124 lines
2.9 KiB
C++
/*
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SPDX-FileCopyrightText: 2020 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 <kwin_export.h>
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#include <QImage>
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#include <QSharedDataPointer>
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#include <QVector>
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#include <chrono>
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namespace KWin
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{
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class KXcursorSpritePrivate;
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class KXcursorThemePrivate;
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/**
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* The KXcursorSprite class represents a single sprite in the Xcursor theme.
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*/
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class KWIN_EXPORT KXcursorSprite
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{
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public:
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/**
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* Constructs an empty XcursorSprite.
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*/
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KXcursorSprite();
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/**
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* Constructs a copy of the KXcursorSprite object @a other.
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*/
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KXcursorSprite(const KXcursorSprite &other);
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/**
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* Constructs an XcursorSprite with the specified @a data, @a hotspot, and @a delay.
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*/
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KXcursorSprite(const QImage &data, const QPoint &hotspot,
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const std::chrono::milliseconds &delay);
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/**
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* Destructs the KXcursorSprite object.
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*/
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~KXcursorSprite();
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/**
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* Assigns the value of @a other to the Xcursor sprite object.
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*/
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KXcursorSprite &operator=(const KXcursorSprite &other);
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/**
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* Returns the image for this sprite.
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*/
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QImage data() const;
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/**
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* Returns the hotspot for this sprite. (0, 0) corresponds to the upper left corner.
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*
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* The coordinates of the hotspot are in device independent pixels.
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*/
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QPoint hotspot() const;
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/**
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* Returns the time interval between this sprite and the next one, in milliseconds.
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*/
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std::chrono::milliseconds delay() const;
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private:
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QSharedDataPointer<KXcursorSpritePrivate> d;
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};
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/**
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* The KXcursorTheme class represents an Xcursor theme.
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*/
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class KWIN_EXPORT KXcursorTheme
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{
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public:
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/**
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* Constructs an empty Xcursor theme.
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*/
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KXcursorTheme();
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/**
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* Constructs a copy of the KXcursorTheme object @a other.
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*/
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KXcursorTheme(const KXcursorTheme &other);
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/**
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* Destructs the KXcursorTheme object.
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*/
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~KXcursorTheme();
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/**
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* Assigns the value of @a other to the Xcursor theme object.
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*/
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KXcursorTheme &operator=(const KXcursorTheme &other);
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/**
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* Returns @c true if the Xcursor theme is empty; otherwise returns @c false.
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*/
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bool isEmpty() const;
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/**
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* Returns the list of cursor sprites for the cursor with the given @a name.
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*/
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QVector<KXcursorSprite> shape(const QByteArray &name) const;
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/**
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* Loads the Xcursor theme with the given @ themeName and the desired @a size.
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* The @a dpr specifies the desired scale factor. If no theme with the provided
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* name exists, an empty KXcursorTheme is returned.
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*/
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static KXcursorTheme fromTheme(const QString &themeName, int size, qreal dpr);
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private:
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KXcursorTheme(const QMap<QByteArray, QVector<KXcursorSprite>> ®istry);
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QSharedDataPointer<KXcursorThemePrivate> d;
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};
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} // namespace KWin
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