File indexing completed on 2024-05-05 05:31:27
0001 /* 0002 SPDX-FileCopyrightText: 2023 Xaver Hugl <xaver.hugl@gmail.com> 0003 0004 SPDX-License-Identifier: LGPL-2.0-or-later 0005 */ 0006 0007 #include <QTest> 0008 0009 #include "core/colorspace.h" 0010 0011 using namespace KWin; 0012 0013 class TestColorspaces : public QObject 0014 { 0015 Q_OBJECT 0016 0017 public: 0018 TestColorspaces() = default; 0019 0020 private Q_SLOTS: 0021 void roundtripConversion_data(); 0022 void roundtripConversion(); 0023 }; 0024 0025 static bool compareVectors(const QVector3D &one, const QVector3D &two, float maxDifference) 0026 { 0027 const bool ret = std::abs(one.x() - two.x()) <= maxDifference 0028 && std::abs(one.y() - two.y()) <= maxDifference 0029 && std::abs(one.z() - two.z()) <= maxDifference; 0030 if (!ret) { 0031 qWarning() << one << "!=" << two << "within" << maxDifference; 0032 } 0033 return ret; 0034 } 0035 0036 void TestColorspaces::roundtripConversion_data() 0037 { 0038 QTest::addColumn<NamedColorimetry>("srcColorimetry"); 0039 QTest::addColumn<NamedTransferFunction>("srcTransferFunction"); 0040 QTest::addColumn<NamedColorimetry>("dstColorimetry"); 0041 QTest::addColumn<NamedTransferFunction>("dstTransferFunction"); 0042 QTest::addColumn<double>("requiredAccuracy"); 0043 0044 const double resolution10bit = std::pow(1.0 / 2.0, 10); 0045 QTest::addRow("BT709 (sRGB) <-> BT2020 (linear)") << NamedColorimetry::BT709 << NamedTransferFunction::sRGB << NamedColorimetry::BT2020 << NamedTransferFunction::linear << resolution10bit; 0046 QTest::addRow("BT709 (gamma 2.2) <-> BT2020 (linear)") << NamedColorimetry::BT709 << NamedTransferFunction::gamma22 << NamedColorimetry::BT2020 << NamedTransferFunction::linear << resolution10bit; 0047 QTest::addRow("BT709 (scRGB) <-> BT2020 (linear)") << NamedColorimetry::BT709 << NamedTransferFunction::scRGB << NamedColorimetry::BT2020 << NamedTransferFunction::linear << resolution10bit; 0048 QTest::addRow("BT709 (linear) <-> BT2020 (linear)") << NamedColorimetry::BT709 << NamedTransferFunction::linear << NamedColorimetry::BT2020 << NamedTransferFunction::linear << resolution10bit; 0049 QTest::addRow("BT709 (PQ) <-> BT2020 (linear)") << NamedColorimetry::BT709 << NamedTransferFunction::PerceptualQuantizer << NamedColorimetry::BT2020 << NamedTransferFunction::linear << 3 * resolution10bit; 0050 } 0051 0052 void TestColorspaces::roundtripConversion() 0053 { 0054 QFETCH(NamedColorimetry, srcColorimetry); 0055 QFETCH(NamedTransferFunction, srcTransferFunction); 0056 QFETCH(NamedColorimetry, dstColorimetry); 0057 QFETCH(NamedTransferFunction, dstTransferFunction); 0058 QFETCH(double, requiredAccuracy); 0059 0060 const auto src = ColorDescription(srcColorimetry, srcTransferFunction, 100, 0, 100, 100); 0061 const auto dst = ColorDescription(dstColorimetry, dstTransferFunction, 100, 0, 100, 100); 0062 0063 const QVector3D red(1, 0, 0); 0064 const QVector3D green(0, 1, 0); 0065 const QVector3D blue(0, 0, 1); 0066 const QVector3D white(1, 1, 1); 0067 0068 QVERIFY(compareVectors(dst.mapTo(src.mapTo(red, dst), src), red, requiredAccuracy)); 0069 QVERIFY(compareVectors(dst.mapTo(src.mapTo(green, dst), src), green, requiredAccuracy)); 0070 QVERIFY(compareVectors(dst.mapTo(src.mapTo(blue, dst), src), blue, requiredAccuracy)); 0071 QVERIFY(compareVectors(dst.mapTo(src.mapTo(white, dst), src), white, requiredAccuracy)); 0072 } 0073 0074 QTEST_MAIN(TestColorspaces) 0075 0076 #include "test_colorspaces.moc"