109 lines
3.3 KiB
C++
109 lines
3.3 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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#include "wayland_cursor_theme.h"
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#include "cursor.h"
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#include "wayland_server.h"
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// Qt
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#include <QVector>
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// KWayland
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#include <KWayland/Client/shm_pool.h>
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#include <KWayland/Server/display.h>
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#include <KWayland/Server/output_interface.h>
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// Wayland
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#include <wayland-cursor.h>
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namespace KWin
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{
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WaylandCursorTheme::WaylandCursorTheme(KWayland::Client::ShmPool *shm, QObject *parent)
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: QObject(parent)
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, m_theme(nullptr)
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, m_shm(shm)
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{
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}
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WaylandCursorTheme::~WaylandCursorTheme()
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{
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destroyTheme();
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}
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void WaylandCursorTheme::loadTheme()
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{
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if (!m_shm->isValid()) {
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return;
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}
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Cursor *c = Cursor::self();
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if (!m_theme) {
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// so far the theme had not been created, this means we need to start tracking theme changes
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connect(c, &Cursor::themeChanged, this, &WaylandCursorTheme::loadTheme);
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} else {
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destroyTheme();
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}
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int size = c->themeSize();
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if (size == 0) {
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// resolution depended
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// as we don't support per screen cursor sizes yet, we use the first screen
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KWayland::Server::Display *display = waylandServer()->display();
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auto output = display->outputs().first();
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// calculate dots per inch, multiplied with magic constants from Cursor::loadThemeSettings()
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size = qreal(output->pixelSize().height()) / (qreal(output->physicalSize().height()) * 0.0393701) * 16.0 / 72.0;
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}
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m_theme = wl_cursor_theme_load(c->themeName().toUtf8().constData(),
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size, m_shm->shm());
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emit themeChanged();
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}
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void WaylandCursorTheme::destroyTheme()
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{
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if (!m_theme) {
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return;
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}
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wl_cursor_theme_destroy(m_theme);
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m_theme = nullptr;
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}
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wl_cursor_image *WaylandCursorTheme::get(Qt::CursorShape shape)
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{
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if (!m_theme) {
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loadTheme();
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}
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if (!m_theme) {
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// loading cursor failed
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return nullptr;
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}
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const QByteArray name = Cursor::self()->cursorName(shape);
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wl_cursor *c = wl_cursor_theme_get_cursor(m_theme, name.constData());
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if (!c || c->image_count <= 0) {
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const auto &names = Cursor::self()->cursorAlternativeNames(name);
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for (auto it = names.begin(), end = names.end(); it != end; it++) {
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c = wl_cursor_theme_get_cursor(m_theme, (*it).constData());
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if (c && c->image_count > 0) {
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break;
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}
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}
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}
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if (!c || c->image_count <= 0) {
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return nullptr;
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}
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// TODO: who deletes c?
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return c->images[0];
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}
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}
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