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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtTest/QtTest>
#include <qicon.h>
class tst_QIconHighDpi : public QObject
{
Q_OBJECT
public:
tst_QIconHighDpi();
private slots:
void initTestCase();
void fromTheme_data();
void fromTheme();
void ninePatch();
};
tst_QIconHighDpi::tst_QIconHighDpi()
{
}
void tst_QIconHighDpi::initTestCase()
{
}
void tst_QIconHighDpi::fromTheme_data()
{
QTest::addColumn<int>("requestedSize");
QTest::addColumn<int>("expectedSize");
QTest::addColumn<qreal>("expectedDpr");
// The pixmaps that we have available can be found in tst_qiconhighdpi.qrc.
// Currently we only have @1 and @2 icons available.
const int dpr = qCeil(qApp->devicePixelRatio());
// We have an @2 high DPI version of the 22x22 size of this icon.
switch (dpr) {
case 1: QTest::newRow("22x22,dpr=1") << 22 << 22 << 1.0; break;
case 2: QTest::newRow("22x22,dpr=2") << 22 << 44 << 2.0; break;
case 3: QTest::newRow("22x22,dpr=3") << 22 << 44 << 2.0; break;
}
// We don't have a high DPI version of the 16x16 size of this icon,
// so directoryMatchesSize() will return false for all directories.
// directorySizeDistance() is then called to find the best match.
// The table below illustrates the results for our available images at various DPRs:
// Available size | Available scale | Requested size | Requested scale | Distance
// 22 * 2 - 16 * 1 = 28
// 22 * 1 - 16 * 1 = 6
// 16 * 1 - 16 * 1 = 0 < (16x16)
// Available size | Available scale | Requested size | Requested scale | Distance
// 22 * 2 - 16 * 2 = 12
// 22 * 1 - 16 * 2 = 10 < (22x22)
// 16 * 1 - 16 * 2 = 16
// Available size | Available scale | Requested size | Requested scale | Distance
// 22 * 2 - 16 * 3 = 4 < (22x22@2)
// 22 * 1 - 16 * 3 = 26
// 16 * 1 - 16 * 3 = 32
// Both of these functions are implementations of the freedesktop icon theme spec,
// which dictates that if there is no matching scale, directorySizeDistance() determines
// the winner, regardless of whether or not the scale is too low for the requested scale.
switch (dpr) {
case 1: QTest::newRow("16x16,dpr=1") << 16 << 16 << 1.0; break;
// PixmapEntry::pixmap() will only downscale the pixmap if actualSize.width() > size.width().
// In this case, 22 > 32 is false, so a 22x22 pixmap is returned.
case 2: QTest::newRow("16x16,dpr=2") << 16 << 22 << 1.375; break;
case 3: QTest::newRow("16x16,dpr=3") << 16 << 44 << 2.75; break;
}
// We don't have an 8x8 size of this icon, so:
// Available size | Available scale | Requested size | Requested scale | Distance
// 22 * 2 - 8 * 1 = 36
// 22 * 1 - 8 * 1 = 14
// 16 * 1 - 8 * 1 = 8 < (16x16)
// Available size | Available scale | Requested size | Requested scale | Distance
// 22 * 2 - 8 * 2 = 28
// 22 * 1 - 8 * 2 = 6
// 16 * 1 - 8 * 2 = 0 < (16x16)
// Available size | Available scale | Requested size | Requested scale | Distance
// 22 * 2 - 8 * 3 = 20
// 22 * 1 - 8 * 3 = 2 < (22x22)
// 16 * 1 - 8 * 3 = 8
switch (dpr) {
case 1: QTest::newRow("8x8,dpr=1") << 8 << 8 << 1.0; break;
case 2: QTest::newRow("8x8,dpr=2") << 8 << 16 << 2.0; break;
case 3: QTest::newRow("8x8,dpr=3") << 8 << 22 << 2.75; break;
}
// We don't have a 44x44 size of this icon, so:
// Available size | Available scale | Requested size | Requested scale | Distance
// 22 * 2 - 44 * 1 = 0 < (22x22@2)
// 22 * 1 - 44 * 1 = 22
// 16 * 1 - 44 * 1 = 28
// Available size | Available scale | Requested size | Requested scale | Distance
// 22 * 2 - 44 * 2 = 44 < (22x22@2)
// 22 * 1 - 44 * 2 = 66
// 16 * 1 - 44 * 2 = 72
// Available size | Available scale | Requested size | Requested scale | Distance
// 22 * 2 - 44 * 3 = 88 < (22x22@2)
// 22 * 1 - 44 * 3 = 110
// 16 * 1 - 44 * 3 = 116
switch (dpr) {
case 1: QTest::newRow("44x44,dpr=1") << 44 << 44 << 1.0; break;
case 2: QTest::newRow("44x44,dpr=2") << 44 << 44 << 1.0; break;
case 3: QTest::newRow("44x44,dpr=3") << 44 << 44 << 1.0; break;
}
// We don't have a 20x20 size of this icon, so:
// Available size | Available scale | Requested size | Requested scale | Distance
// 22 * 2 - 20 * 1 = 24
// 22 * 1 - 20 * 1 = 2 < (22x22)
// 16 * 1 - 20 * 1 = 4
// Available size | Available scale | Requested size | Requested scale | Distance
// 22 * 2 - 20 * 2 = 4 < (22x22@2)
// 22 * 1 - 20 * 2 = 18
// 16 * 1 - 20 * 2 = 24
// Available size | Available scale | Requested size | Requested scale | Distance
// 22 * 2 - 20 * 3 = 16 < (22x22@2)
// 22 * 1 - 20 * 3 = 38
// 16 * 1 - 20 * 3 = 44
switch (dpr) {
case 1: QTest::newRow("20x20,dpr=1") << 20 << 20 << 1.0; break;
// PixmapEntry::pixmap() will only downscale the pixmap if actualSize.width() > size.width().
// In this case, 44 > 40 is true, so the 44x44 pixmap is downscaled to 40x40.
case 2: QTest::newRow("20x20,dpr=2") << 20 << 40 << 2.0; break;
case 3: QTest::newRow("20x20,dpr=3") << 20 << 44 << 2.2; break;
}
}
void tst_QIconHighDpi::fromTheme()
{
QFETCH(int, requestedSize);
QFETCH(int, expectedSize);
QFETCH(qreal, expectedDpr);
QString searchPath = QLatin1String(":/icons");
QIcon::setThemeSearchPaths(QStringList() << searchPath);
QCOMPARE(QIcon::themeSearchPaths().size(), 1);
QCOMPARE(searchPath, QIcon::themeSearchPaths()[0]);
QString themeName("testtheme");
QIcon::setThemeName(themeName);
QCOMPARE(QIcon::themeName(), themeName);
QIcon appointmentIcon = QIcon::fromTheme("appointment-new");
QVERIFY(!appointmentIcon.isNull());
QVERIFY(!appointmentIcon.availableSizes(QIcon::Normal, QIcon::Off).isEmpty());
QVERIFY(appointmentIcon.availableSizes().contains(QSize(16, 16)));
QVERIFY(appointmentIcon.availableSizes().contains(QSize(22, 22)));
const QPixmap pixmap = appointmentIcon.pixmap(requestedSize);
QCOMPARE(pixmap.size(), QSize(expectedSize, expectedSize));
// We should get the high DPI version of an image if it exists in the correct directory.
// Note that we didn't pass the QWindow to QIcon::pixmap(),
// because QGuiApplication::devicePixelRatio() will be used if no window was given.
QCOMPARE(pixmap.devicePixelRatio(), expectedDpr);
}
void tst_QIconHighDpi::ninePatch()
{
const QIcon icon(":/icons/misc/button.9.png");
const int dpr = qCeil(qApp->devicePixelRatio());
switch (dpr) {
case 1:
QCOMPARE(icon.availableSizes().size(), 1);
QCOMPARE(icon.availableSizes().at(0), QSize(42, 42));
break;
case 2:
QCOMPARE(icon.availableSizes().size(), 2);
QCOMPARE(icon.availableSizes().at(0), QSize(42, 42));
QCOMPARE(icon.availableSizes().at(1), QSize(82, 82));
break;
}
}
int main(int argc, char *argv[])
{
QGuiApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
QGuiApplication app(argc, argv);
Q_UNUSED(app);
tst_QIconHighDpi test;
QTEST_SET_MAIN_SOURCE_PATH
return QTest::qExec(&test, argc, argv);
}
#include "tst_qiconhighdpi.moc"
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