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autotests/test_colorspaces: add an autotest for non-normalized primaries

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This commit is contained in:
Xaver Hugl 2024-02-27 14:49:31 +01:00
parent dd53576fe2
commit 765cd82613
1 changed files with 20 additions and 6 deletions
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26
autotests/test_colorspaces.cpp
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@ -20,6 +20,7 @@ public:
private Q_SLOTS:
void roundtripConversion_data();
void roundtripConversion();
void nonNormalizedPrimaries();
};
static bool compareVectors(const QVector3D &one, const QVector3D &two, float maxDifference)
@ -33,6 +34,8 @@ static bool compareVectors(const QVector3D &one, const QVector3D &two, float max
return ret;
}
static const double s_resolution10bit = std::pow(1.0 / 2.0, 10);
void TestColorspaces::roundtripConversion_data()
{
QTest::addColumn<NamedColorimetry>("srcColorimetry");
@ -41,12 +44,11 @@ void TestColorspaces::roundtripConversion_data()
QTest::addColumn<NamedTransferFunction>("dstTransferFunction");
QTest::addColumn<double>("requiredAccuracy");
const double resolution10bit = std::pow(1.0 / 2.0, 10);
QTest::addRow("BT709 (sRGB) <-> BT2020 (linear)") << NamedColorimetry::BT709 << NamedTransferFunction::sRGB << NamedColorimetry::BT2020 << NamedTransferFunction::linear << resolution10bit;
QTest::addRow("BT709 (gamma 2.2) <-> BT2020 (linear)") << NamedColorimetry::BT709 << NamedTransferFunction::gamma22 << NamedColorimetry::BT2020 << NamedTransferFunction::linear << resolution10bit;
QTest::addRow("BT709 (scRGB) <-> BT2020 (linear)") << NamedColorimetry::BT709 << NamedTransferFunction::scRGB << NamedColorimetry::BT2020 << NamedTransferFunction::linear << resolution10bit;
QTest::addRow("BT709 (linear) <-> BT2020 (linear)") << NamedColorimetry::BT709 << NamedTransferFunction::linear << NamedColorimetry::BT2020 << NamedTransferFunction::linear << resolution10bit;
QTest::addRow("BT709 (PQ) <-> BT2020 (linear)") << NamedColorimetry::BT709 << NamedTransferFunction::PerceptualQuantizer << NamedColorimetry::BT2020 << NamedTransferFunction::linear << 3 * resolution10bit;
QTest::addRow("BT709 (sRGB) <-> BT2020 (linear)") << NamedColorimetry::BT709 << NamedTransferFunction::sRGB << NamedColorimetry::BT2020 << NamedTransferFunction::linear << s_resolution10bit;
QTest::addRow("BT709 (gamma 2.2) <-> BT2020 (linear)") << NamedColorimetry::BT709 << NamedTransferFunction::gamma22 << NamedColorimetry::BT2020 << NamedTransferFunction::linear << s_resolution10bit;
QTest::addRow("BT709 (scRGB) <-> BT2020 (linear)") << NamedColorimetry::BT709 << NamedTransferFunction::scRGB << NamedColorimetry::BT2020 << NamedTransferFunction::linear << s_resolution10bit;
QTest::addRow("BT709 (linear) <-> BT2020 (linear)") << NamedColorimetry::BT709 << NamedTransferFunction::linear << NamedColorimetry::BT2020 << NamedTransferFunction::linear << s_resolution10bit;
QTest::addRow("BT709 (PQ) <-> BT2020 (linear)") << NamedColorimetry::BT709 << NamedTransferFunction::PerceptualQuantizer << NamedColorimetry::BT2020 << NamedTransferFunction::linear << 3 * s_resolution10bit;
}
void TestColorspaces::roundtripConversion()
@ -71,6 +73,18 @@ void TestColorspaces::roundtripConversion()
QVERIFY(compareVectors(dst.mapTo(src.mapTo(white, dst), src), white, requiredAccuracy));
}
void TestColorspaces::nonNormalizedPrimaries()
{
// this test ensures that non-normalized primaries don't mess up the transformations between color spaces
const auto from = Colorimetry::fromName(NamedColorimetry::BT709);
const auto to = Colorimetry(Colorimetry::xyToXYZ(from.red()) * 2, Colorimetry::xyToXYZ(from.green()) * 2, Colorimetry::xyToXYZ(from.blue()) * 2, Colorimetry::xyToXYZ(from.white()) * 2);
const auto convertedWhite = from.toOther(to) * QVector3D(1, 1, 1);
QCOMPARE_LE(std::abs(1 - convertedWhite.x()), s_resolution10bit);
QCOMPARE_LE(std::abs(1 - convertedWhite.y()), s_resolution10bit);
QCOMPARE_LE(std::abs(1 - convertedWhite.z()), s_resolution10bit);
}
QTEST_MAIN(TestColorspaces)
#include "test_colorspaces.moc"