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Diffstat (limited to 'tests/auto/gui/image/qiconhighdpi/tst_qiconhighdpi.cpp')
| -rw-r--r-- | tests/auto/gui/image/qiconhighdpi/tst_qiconhighdpi.cpp | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/tests/auto/gui/image/qiconhighdpi/tst_qiconhighdpi.cpp b/tests/auto/gui/image/qiconhighdpi/tst_qiconhighdpi.cpp new file mode 100644 index 0000000000..ce7f68a0a6 --- /dev/null +++ b/tests/auto/gui/image/qiconhighdpi/tst_qiconhighdpi.cpp @@ -0,0 +1,195 @@ +/**************************************************************************** +** +** 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(); +}; + +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); +} + +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" |