c5693270db
At least the framebuffer backend does not have support for an overlay cursor. Thus the cursor needs to be rendered by the scene. This change allows a backend to set that it needs a software cursor which triggers tracking in the AbstractBackend. A repaint for the old cursor region is triggered whenever the cursor pos changes. So far only the QPainter/framebuffer scene is adjusted to render the software cursor. This is done after rendering a frame with the up to date cursor position. There is one problem, though: the KWin internal cursors don't work as we need to get it from the theme. Using wayland-cursor doesn't help as it gives us a (client) wl_buffer* and we cannot read the memory back.
72 lines
2 KiB
C++
72 lines
2 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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Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#ifndef KWIN_ABSTRACT_BACKEND_H
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#define KWIN_ABSTRACT_BACKEND_H
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#include <kwin_export.h>
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#include <QImage>
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#include <QObject>
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namespace KWin
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{
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class OpenGLBackend;
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class QPainterBackend;
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class Screens;
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class KWIN_EXPORT AbstractBackend : public QObject
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{
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Q_OBJECT
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public:
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virtual ~AbstractBackend();
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virtual void installCursorFromServer();
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virtual void installCursorImage(Qt::CursorShape shape);
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virtual Screens *createScreens(QObject *parent = nullptr);
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virtual OpenGLBackend *createOpenGLBackend();
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virtual QPainterBackend *createQPainterBackend();
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bool usesSoftwareCursor() const {
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return m_softWareCursor;
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}
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QImage softwareCursor() const {
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return m_cursor.image;
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}
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QPoint softwareCursorHotspot() const {
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return m_cursor.hotspot;
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}
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void markCursorAsRendered();
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protected:
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explicit AbstractBackend(QObject *parent = nullptr);
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void setSoftWareCursor(bool set);
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private:
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void triggerCursorRepaint();
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bool m_softWareCursor = false;
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struct {
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QPoint hotspot;
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QImage image;
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QPoint lastRenderedPosition;
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} m_cursor;
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};
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}
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#endif
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