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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include <qpainter.h>
#include <qrasterwindow.h>
#include <qscreen.h>
#include <qpa/qwindowsysteminterface.h>
#include <QProcess>
#include <QtTest/QtTest>
class tst_QScreen_Xrandr: public QObject
{
Q_OBJECT
private slots:
void xrandr_15_merge_and_unmerge();
void xrandr_15_scale();
void xrandr_15_off_and_on();
void xrandr_15_primary();
void xrandr_15_rotate();
private:
void xrandr_process(const QStringList &arguments = {});
};
// this test requires an X11 desktop with at least two screens
void tst_QScreen_Xrandr::xrandr_15_merge_and_unmerge()
{
QStringList originalScreenNames;
QStringList mergedScreenNames;
{
QList<QScreen *> screens = QGuiApplication::screens();
if (screens.size() < 2)
QSKIP("This test requires two or more screens.");
qDebug() << "initial set of screens:" << screens.size();
for (QScreen *s : screens) {
qDebug() << "screen: " << s->name();
originalScreenNames << s->name();
if (mergedScreenNames.size() < 2)
mergedScreenNames << s->name();
}
}
QSignalSpy addedSpy(qApp, &QGuiApplication::screenAdded);
QSignalSpy removedSpy(qApp, &QGuiApplication::screenRemoved);
// combine the first two screens into one monitor
// e.g. "xrandr --setmonitor Qt-merged auto eDP,HDMI-0"
QStringList args;
args << "--setmonitor" << "Qt-merged" << "auto" << mergedScreenNames.join(',');
xrandr_process(args);
QTRY_COMPARE(removedSpy.count(), 2);
QVERIFY(QGuiApplication::screens().size() != originalScreenNames.size());
auto combinedScreens = QGuiApplication::screens();
qDebug() << "added" << addedSpy.count() << "removed" << removedSpy.count() << "combined screen(s):" << combinedScreens.size();
QScreen *merged = nullptr;
for (QScreen *s : combinedScreens) {
qDebug() << "screen: " << s->name();
if (s->name() == QLatin1String("Qt-merged"))
merged = s;
}
// the screen that we created must be in the list now
QVERIFY(merged);
QCOMPARE(QGuiApplication::screens().size(), originalScreenNames.size() - 1);
addedSpy.clear();
removedSpy.clear();
// "xrandr --delmonitor Qt-merged"
args.clear();
args << "--delmonitor" << "Qt-merged";
xrandr_process(args);
QTRY_COMPARE(removedSpy.count(), 1);
QVERIFY(QGuiApplication::screens().size() != combinedScreens.size());
auto separatedScreens = QGuiApplication::screens();
qDebug() << "added" << addedSpy.count() << "removed" << removedSpy.count() << "separated screen(s):" << separatedScreens.size();
for (QScreen *s : separatedScreens)
qDebug() << "screen: " << s->name();
QCOMPARE(QGuiApplication::screens().size(), originalScreenNames.size());
}
// try to scale the first screen to 1.5x1.5 and scale back to 1x1
void tst_QScreen_Xrandr::xrandr_15_scale()
{
QList<QScreen *> screens = QGuiApplication::screens();
if (screens.size() < 1)
QSKIP("This test requires at least one screen.");
QScreen *screen1 = screens.at(0);
QString name1 = screen1->name();
int height1 = screen1->size().height();
int width1 = screen1->size().width();
qDebug() << "screen " << name1 << ": height=" << height1 << ", width=" << width1;
int expectedHeight = height1 * 1.5;
int expectedWidth = width1 * 1.5;
QSignalSpy geometryChangedSpy1(screen1, &QScreen::geometryChanged);
// "xrandr --output name1 --scale 1.5x1.5"
QStringList args;
args << "--output" << name1 << "--scale" << "1.5x1.5";
xrandr_process(args);
QTRY_COMPARE(geometryChangedSpy1.count(), 1);
QList<QScreen *> screens2 = QGuiApplication::screens();
QVERIFY(screens2.size() >= 1);
QScreen *screen2 = nullptr;
for (QScreen *s : screens2) {
if (s->name() == name1)
screen2 = s;
}
int height2 = screen2->size().height();
int width2 = screen2->size().width();
qDebug() << "screen " << name1 << ": height=" << height2 << ", width=" << width2;
QVERIFY(height2 == expectedHeight);
QVERIFY(width2 == expectedWidth);
QSignalSpy geometryChangedSpy2(screen2, &QScreen::geometryChanged);
// "xrandr --output name1 --scale 1x1"
args.clear();
args << "--output" << name1 << "--scale" << "1x1";
xrandr_process(args);
QTRY_COMPARE(geometryChangedSpy2.count(), 1);
QList<QScreen *> screens3 = QGuiApplication::screens();
QVERIFY(screens3.size() >= 1);
QScreen *screen3 = nullptr;
for (QScreen *s : screens3) {
if (s->name() == name1)
screen3 = s;
}
int height3 = screen3->size().height();
int width3 = screen3->size().width();
qDebug() << "screen " << name1 << ": height=" << height3 << ", width=" << width3;
QVERIFY(height3 == height1);
QVERIFY(width3 == width1);
}
void tst_QScreen_Xrandr::xrandr_15_off_and_on()
{
QList<QScreen *> screens = QGuiApplication::screens();
int ss = screens.size();
if (ss < 1)
QSKIP("This test requires at least one screen.");
QStringList names;
for (QScreen *s : screens)
names << s->name();
QStringList args;
for (int i = ss; i > 0; i--) {
QString name = names.at(i-1);
qDebug() << "i=" << i << ", name:" << name;
args.clear();
args << "--output" << name << "--off";
xrandr_process(args);
QTest::qWait(500);
QVERIFY(QGuiApplication::screens().size() == (i != 1 ? i - 1 : i));
}
for (int i = ss; i > 0; i--) {
QString name = names.at(i-1);
qDebug() << "i=" << i << ", name:" << name;
args.clear();
args << "--output" << name << "--auto";
xrandr_process(args);
QTest::qWait(500);
QVERIFY(QGuiApplication::screens().size() == (i == ss ? 1 : ss - i + 1));
}
}
void tst_QScreen_Xrandr::xrandr_15_primary()
{
QList<QScreen *> screens = QGuiApplication::screens();
int ss = screens.size();
if (ss < 2)
QSKIP("This test requires at least two screens.");
QStringList names;
for (QScreen *s : screens)
names << s->name();
qDebug() << "All screens: " << names;
QScreen *ps = qGuiApp->primaryScreen();
qDebug() << "Current primary screen: " << ps;
QStringList args;
for (QString name : names) {
qDebug() << "Trying to set primary screen:" << name;
args.clear();
args << "--output" << name << "--primary";
xrandr_process(args);
QTest::qWait(500);
QScreen *ps = qGuiApp->primaryScreen();
qDebug() << "Current primary screen: " << ps;
if (ps) {
qDebug() << "primary screen name: " << ps->name();
QVERIFY(ps->name() == name);
}
}
}
void tst_QScreen_Xrandr::xrandr_15_rotate()
{
QList<QScreen *> screens = QGuiApplication::screens();
int ss = screens.size();
if (ss < 1)
QSKIP("This test requires at least one screen.");
QScreen *screen1 = screens.at(0);
QString name1 = screen1->name();
int height1 = screen1->size().height();
int width1 = screen1->size().width();
qDebug() << "screen " << name1 << ": height=" << height1 << ", width=" << width1;
int expectedHeight = width1;
int expectedWidth = height1;
QSignalSpy geometryChangedSpy1(screen1, &QScreen::geometryChanged);
// "xrandr --output name1 --rotate left"
QStringList args;
args << "--output" << name1 << "--rotate" << "left";
xrandr_process(args);
QTRY_COMPARE(geometryChangedSpy1.count(), 1);
QList<QScreen *> screens2 = QGuiApplication::screens();
QVERIFY(screens2.size() >= 1);
QScreen *screen2 = nullptr;
for (QScreen *s : screens2) {
if (s->name() == name1)
screen2 = s;
}
int height2 = screen2->size().height();
int width2 = screen2->size().width();
qDebug() << "screen " << name1 << ": height=" << height2 << ", width=" << width2;
QVERIFY(height2 == expectedHeight);
QVERIFY(width2 == expectedWidth);
QSignalSpy geometryChangedSpy2(screen2, &QScreen::geometryChanged);
// "xrandr --output name1 --rotate normal"
args.clear();
args << "--output" << name1 << "--rotate" << "normal";
xrandr_process(args);
QTRY_COMPARE(geometryChangedSpy2.count(), 1);
QList<QScreen *> screens3 = QGuiApplication::screens();
QVERIFY(screens3.size() >= 1);
QScreen *screen3 = nullptr;
for (QScreen *s : screens3) {
if (s->name() == name1)
screen3 = s;
}
int height3 = screen3->size().height();
int width3 = screen3->size().width();
qDebug() << "screen " << name1 << ": height=" << height3 << ", width=" << width3;
QVERIFY(height3 == height1);
QVERIFY(width3 == width1);
}
void tst_QScreen_Xrandr::xrandr_process(const QStringList &args)
{
QString prog = "xrandr";
QProcess *process = new QProcess(this);
qDebug() << Q_FUNC_INFO << prog << args;
process->start(prog, args);
QVERIFY(process->waitForFinished());
}
#include <tst_qscreen_xrandr.moc>
QTEST_MAIN(tst_QScreen_Xrandr);
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