148 lines
7.5 KiB
C++
148 lines
7.5 KiB
C++
#include "CameraRawFixtures.h"
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#include "Document/CameraRawTables.h"
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#include <QtTest>
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// The measured tables as Swift reads them, checked against Python.
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using namespace CameraRawFixtures;
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class CameraRawTablesTests : public QObject {
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Q_OBJECT
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private slots:
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void theTablesDecodeAsWritten();
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void aStageBlendsTheTablesAroundItsValue();
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void eachSliderPicksItsOwnTables();
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void neutralizeFindsTheGridsGrayest();
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void identitySlidersComposeNothing();
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};
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namespace {
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const uint8_t *entry(int table, int cell)
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{
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constexpr size_t entries = size_t(CameraRawTables::size) * CameraRawTables::size * CameraRawTables::size * 3;
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return CameraRawTables::tables().data() + table * entries + size_t(cell) * 3;
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}
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int indexOf(const uint8_t *table)
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{
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constexpr size_t entries = size_t(CameraRawTables::size) * CameraRawTables::size * CameraRawTables::size * 3;
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return table ? int((table - CameraRawTables::tables().data()) / qsizetype(entries)) : -1;
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}
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}
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void CameraRawTablesTests::theTablesDecodeAsWritten()
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{
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const std::vector<uint8_t> &tables = CameraRawTables::tables();
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QCOMPARE(tables.size(), size_t(147) * 17 * 17 * 17 * 3);
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quint64 hash = 0xcbf29ce484222325ULL;
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for (const uint8_t byte : tables)
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hash = (hash ^ byte) * 0x100000001b3ULL;
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QCOMPARE(hash, quint64(0x6a9f829e703f2df6ULL));
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QCOMPARE(std::vector<int>(entry(40, 2456), entry(40, 2456) + 3), (std::vector<int>{128, 128, 128}));
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QCOMPARE(std::vector<int>(entry(81, 100), entry(81, 100) + 3), (std::vector<int>{0, 4, 32}));
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QCOMPARE(std::vector<int>(entry(146, 4912), entry(146, 4912) + 3), (std::vector<int>{255, 255, 255}));
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}
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void CameraRawTablesTests::aStageBlendsTheTablesAroundItsValue()
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{
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const CameraRawStage balance = CameraRawTables::whiteBalance(30, -60);
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QCOMPARE((std::vector<int>{indexOf(balance.table[0]), indexOf(balance.table[1]), indexOf(balance.table[2]), indexOf(balance.table[3])}),
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(std::vector<int>{46, 47, 55, 56}));
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QCOMPARE((std::vector<float>{balance.weight[0], balance.weight[1], balance.weight[2], balance.weight[3]}),
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(std::vector<float>{0.32f, 0.48f, 0.08f, 0.12f}));
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// At the far corner the last pair takes it all.
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const CameraRawStage corner = CameraRawTables::whiteBalance(100, 100);
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QVERIFY(indexOf(corner.table[0]) == 70 && indexOf(corner.table[3]) == 80 && corner.weight[3] == 1 && corner.weight[0] == 0);
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// Past the range it holds at the end, never beyond.
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const CameraRawStage past = CameraRawTables::whiteBalance(150, 175);
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QVERIFY(indexOf(past.table[3]) == 80 && past.weight[3] == 1 && past.weight[0] == 0);
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const CameraRawStage low = CameraRawTables::whiteBalance(-100, -100);
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QVERIFY(indexOf(low.table[0]) == 0 && low.weight[0] == 1 && low.weight[1] == 0);
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}
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void CameraRawTablesTests::eachSliderPicksItsOwnTables()
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{
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CameraRawSettings settings;
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settings.exposure = 1.25;
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settings.temperature = 30;
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settings.contrast = -100;
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settings.whites = 100;
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settings.blacks = 12.5;
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settings.saturation = -62.5;
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settings.vibrance = 80;
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const CameraRawTables::Stages stages = CameraRawTables::stages(settings);
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QCOMPARE(stages.before.size(), size_t(3));
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QCOMPARE(stages.after.size(), size_t(4));
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const auto pair = [](const CameraRawStage &stage) {
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return std::vector<double>{double(indexOf(stage.table[0])), double(indexOf(stage.table[1])), stage.weight[0], stage.weight[1]};
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};
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QCOMPARE(pair(stages.before[0]), (std::vector<double>{93, 94, 0.5, 0.5}));
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QCOMPARE(indexOf(stages.before[1].table[0]), 5 * 9 + 4);
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QCOMPARE(pair(stages.before[2]), (std::vector<double>{102, 103, 1, 0}));
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QCOMPARE(pair(stages.after[0]), (std::vector<double>{118, 119, 0, 1}));
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QCOMPARE(pair(stages.after[1]), (std::vector<double>{124, 125, 0.5, 0.5}));
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QCOMPARE(pair(stages.after[2]), (std::vector<double>{130, 131, 0.5, 0.5}));
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QVERIFY(indexOf(stages.after[3].table[0]) == 145 && std::abs(stages.after[3].weight[1] - 0.2f) < 1e-6);
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// Tint alone still makes the white balance stage.
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CameraRawSettings tint;
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tint.tint = -25;
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const CameraRawTables::Stages tinted = CameraRawTables::stages(tint);
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QVERIFY(tinted.before.size() == 1 && tinted.after.empty() && indexOf(tinted.before[0].table[0]) == 4 * 9 + 3);
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}
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void CameraRawTablesTests::neutralizeFindsTheGridsGrayest()
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{
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// Python's own search over the same tables found these.
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const CameraRawSettings::Balance warm = CameraRawTables::neutralize(160 / 255.0, 140 / 255.0, 120 / 255.0).value();
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QVERIFY(warm.temperature == -19 && warm.tint == -7);
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const CameraRawSettings::Balance blue = CameraRawTables::neutralize(0.2, 0.45, 0.8).value();
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QVERIFY(blue.temperature == 100 && blue.tint == 25.5);
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const CameraRawSettings::Balance green = CameraRawTables::neutralize(0.3, 0.5, 0.25).value();
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QVERIFY(green.temperature == 5 && green.tint == 90.5);
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// White stays white anywhere: the first of the ties wins.
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const CameraRawSettings::Balance white = CameraRawTables::neutralize(1, 1, 1).value();
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QVERIFY(white.temperature == 0 && white.tint == 0);
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// A refinement past −100 keeps to the range.
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const CameraRawSettings::Balance edge = CameraRawTables::neutralize(84 / 255.0, 1 / 255.0, 97 / 255.0).value();
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QVERIFY(edge.temperature == -14.5 && edge.tint == -100);
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const CameraRawSettings::Balance hot = CameraRawTables::neutralize(240 / 255.0, 80 / 255.0, 40 / 255.0).value();
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QVERIFY(hot.temperature == -100 && hot.tint == -13.5);
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// Ties among searched points: tint rising within each temperature.
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const CameraRawSettings::Balance tie = CameraRawTables::neutralize(144 / 255.0, 216 / 255.0, 47 / 255.0).value();
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QVERIFY(tie.temperature == -100 && tie.tint == 60);
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// Any channel missing leaves nothing to balance from.
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QVERIFY(!CameraRawTables::neutralize(0.5, 0.0001, 0.5));
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QVERIFY(!CameraRawTables::neutralize(0, 128 / 255.0, 128 / 255.0));
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QVERIFY(!CameraRawTables::neutralize(128 / 255.0, 128 / 255.0, 0));
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QVERIFY(CameraRawTables::neutralize(0.5, 0.00011, 0.5));
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}
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void CameraRawTablesTests::identitySlidersComposeNothing()
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{
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const CameraRawTables::Stages none = CameraRawTables::stages(CameraRawSettings());
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QVERIFY(none.before.empty() && none.after.empty() && CameraRawTables::compose(none.before).empty());
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CameraRawSettings exposure;
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exposure.exposure = 0.5;
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const std::vector<float> composed = CameraRawTables::compose(CameraRawTables::stages(exposure).before);
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QCOMPARE(composed.size(), size_t(33) * 33 * 33 * 3);
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// The corners are its table's own black and white.
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QVERIFY(composed[0] == entry(92, 0)[0] / 255.0f && composed.back() == entry(92, 4912)[2] / 255.0f);
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// Three stages in their order, against Python's own run.
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CameraRawSettings three;
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three.exposure = 1;
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three.temperature = 40;
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three.contrast = 50;
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const std::vector<float> run = CameraRawTables::compose(CameraRawTables::stages(three).before);
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const auto at = [&](int r, int g, int b) {
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const size_t index = ((size_t(r) * 33 + g) * 33 + b) * 3;
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return std::array<float, 3>{run[index], run[index + 1], run[index + 2]};
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};
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const auto near = [](std::array<float, 3> got, std::array<float, 3> expected) {
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return std::abs(got[0] - expected[0]) < 1e-6f && std::abs(got[1] - expected[1]) < 1e-6f && std::abs(got[2] - expected[2]) < 1e-6f;
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};
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QVERIFY(near(at(16, 16, 16), {0.94074458f, 0.85085034f, 0.72421813f}));
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QVERIFY(near(at(16, 4, 28), {0.85322261f, 0.50834316f, 0.98791242f}));
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}
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QTEST_GUILESS_MAIN(CameraRawTablesTests)
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#include "CameraRawTablesTests.moc"
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