OmaPhoto 1.0.0: the Linux port of Compositor
A layered image editor for Linux and Omarchy, ported from Compositor (github.com/robbietilton/Compositor), whose Swift source is its specification. It reads and writes Compositor's .comp projects. Packages for Ubuntu, Fedora and Arch come from the release workflow; scripts/install/ holds one install script per distribution family, and flake.nix serves NixOS. Co-Authored-By: Claude <noreply@anthropic.com>
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#include "UI/CurvesControls.h"
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#include <QAccessible>
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#include <QApplication>
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#include <QDialog>
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#include <QPainter>
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#include <QtTest>
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// Swift's CurvesControls: add, drag, remove, reset, channel.
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namespace {
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// Controls over their own settings, a pixel a unit.
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struct Curves {
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CurvesSettings settings;
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CurvesControls controls{[this] { return settings; }, [this](const CurvesSettings &changed) { settings = changed; }};
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Curves()
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{
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controls.resize(255, 420);
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controls.show();
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if (!QTest::qWaitForWindowExposed(&controls))
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throw std::runtime_error("the controls never showed");
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}
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QWidget &graph() const { return *controls.findChild<QWidget *>(QStringLiteral("curvesGraph")); }
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QPushButton &button(const QString &text) const
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{
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for (QPushButton *button : controls.findChildren<QPushButton *>()) {
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if (button->text() == text)
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return *button;
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}
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throw std::runtime_error(text.toStdString());
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}
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QLabel &readout() const { return *controls.findChild<QLabel *>(QStringLiteral("curvesReadout")); }
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const std::vector<CurvePoint> &points() const { return settings.channels.at(size_t(settings.channel)); }
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void press(QPoint at, Qt::MouseButton button = Qt::LeftButton) { QTest::mousePress(&graph(), button, Qt::NoModifier, at); }
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void move(QPoint to, Qt::MouseButtons buttons = Qt::LeftButton)
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{
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QMouseEvent event(QEvent::MouseMove, to, graph().mapToGlobal(to), Qt::NoButton, buttons, Qt::NoModifier);
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QApplication::sendEvent(&graph(), &event);
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}
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void release(QPoint at, Qt::MouseButton button = Qt::LeftButton) { QTest::mouseRelease(&graph(), button, Qt::NoModifier, at); }
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void click(QPoint at)
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{
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press(at);
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release(at);
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}
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};
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// A curve with points at even x, 32 in all.
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std::vector<CurvePoint> full()
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{
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std::vector<CurvePoint> points{{0, 0}};
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for (int index = 1; index < 31; ++index)
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points.push_back({double(index * 8), double(index * 8)});
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points.push_back({255, 255});
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return points;
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}
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}
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class CurvesControlsTests : public QObject {
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Q_OBJECT
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private slots:
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void theControlsShowSwiftsParts();
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void aClickAddsAPointThatDragsBetweenItsNeighbours();
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void aPressNearAPointTakesItAndNewOnesNeedRoom();
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void removeAndResetTheChannelsCurve();
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void anotherChannelDropsTheSelection();
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void theGraphDrawsGridCurveAndPoints();
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};
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void CurvesControlsTests::theControlsShowSwiftsParts()
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{
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Curves shown;
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QComboBox &channel = *shown.controls.findChild<QComboBox *>();
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QCOMPARE(channel.count(), 4);
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QCOMPARE(channel.itemText(1), QString("Red"));
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const auto labels = QAccessible::queryAccessibleInterface(&channel)->relations(QAccessible::Label);
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QCOMPARE(labels.size(), 1);
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QCOMPARE(labels.first().first->text(QAccessible::Name), QString("Channel"));
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// Rows twelve apart: picker, graph, hint, readout, reset.
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QWidget &graph = shown.graph();
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QCOMPARE(graph.geometry(), QRect(0, channel.geometry().bottom() + 13, 255, 260));
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QLabel *hint = nullptr;
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for (QLabel *label : shown.controls.findChildren<QLabel *>()) {
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if (label->text() == QStringLiteral("Click to add a point. Drag to adjust."))
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hint = label;
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}
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QVERIFY(hint && hint->y() == graph.geometry().bottom() + 13);
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QCOMPARE(hint->font().pixelSize(), 10);
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QCOMPARE(hint->foregroundRole(), QPalette::PlaceholderText);
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QPushButton &remove = shown.button("Remove point"), &reset = shown.button("Reset curve");
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QVERIFY(shown.readout().isHidden() && !remove.isEnabled());
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QCOMPARE(remove.geometry().right(), 254);
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QCOMPARE(remove.width(), remove.sizeHint().width());
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QCOMPARE(reset.x(), 0);
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QCOMPARE(reset.width(), reset.sizeHint().width());
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QCOMPARE(reset.y(), remove.geometry().bottom() + 13);
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// In a panel, Return still reaches the panel's default.
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QDialog panel;
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CurvesSettings settings;
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CurvesControls inside([&] { return settings; }, [&](const CurvesSettings &changed) { settings = changed; }, &panel);
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for (QPushButton *button : inside.findChildren<QPushButton *>())
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QVERIFY(!button->autoDefault());
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}
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void CurvesControlsTests::aClickAddsAPointThatDragsBetweenItsNeighbours()
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{
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Curves shown;
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shown.press(QPoint(100, 104));
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QCOMPARE(shown.points(), (std::vector<CurvePoint>{{0, 0}, {100, 153}, {255, 255}}));
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QVERIFY(!shown.readout().isHidden());
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QCOMPARE(shown.readout().text(), QString("Input 100 · Output 153"));
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QVERIFY(shown.button("Remove point").isEnabled());
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// Dragged, it keeps a unit from each neighbour.
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shown.move(QPoint(400, -20));
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QCOMPARE(shown.points()[1], (CurvePoint{254, 255}));
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shown.move(QPoint(-50, 300));
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QCOMPARE(shown.points()[1], (CurvePoint{1, 0}));
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QCOMPARE(shown.readout().text(), QString("Input 1 · Output 0"));
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// Other buttons move nothing.
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shown.move(QPoint(100, 104), Qt::RightButton);
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QCOMPARE(shown.points()[1], (CurvePoint{1, 0}));
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shown.release(QPoint(-50, 300));
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// Released: the next press away adds another.
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shown.click(QPoint(200, 51));
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QCOMPARE(shown.points().size(), size_t(4));
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QVERIFY(shown.points()[2].x == 200 && shown.points()[2].y > 204.9);
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// The readout cuts fractions, as Swift's Int().
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QCOMPARE(shown.readout().text(), QString("Input 200 · Output 204"));
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// Only the left button presses.
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shown.press(QPoint(150, 104), Qt::MiddleButton);
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shown.release(QPoint(150, 104), Qt::MiddleButton);
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QCOMPARE(shown.points().size(), size_t(4));
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}
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void CurvesControlsTests::aPressNearAPointTakesItAndNewOnesNeedRoom()
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{
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Curves shown;
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// Within fourteen units the end moves, up and down only.
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shown.press(QPoint(5, 255));
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shown.move(QPoint(9, 208));
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shown.release(QPoint(9, 208));
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QCOMPARE(shown.points(), (std::vector<CurvePoint>{{0, 51}, {255, 255}}));
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QCOMPARE(shown.readout().text(), QString("Input 0 · Output 51"));
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QVERIFY(!shown.button("Remove point").isEnabled());
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// A press past an edge reads as the edge.
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shown.press(QPoint(300, 3));
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shown.move(QPoint(300, 26));
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shown.release(QPoint(300, 26));
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QCOMPARE(shown.points().back(), (CurvePoint{255, 229.5}));
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shown.press(QPoint(-30, 195));
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shown.release(QPoint(-30, 195));
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QCOMPARE(shown.points().front(), (CurvePoint{0, 63.75}));
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// Fourteen units off is too far to take.
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shown.settings.channels[0] = {{0, 51}, {255, 255}};
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shown.click(QPoint(14, 208));
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QCOMPARE(shown.points().size(), size_t(3));
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shown.settings.channels[0] = {{0, 51}, {255, 255}};
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shown.controls.synchronize();
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// Farther, a point is added; none at the edges.
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shown.click(QPoint(20, 260));
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QCOMPARE(shown.points().size(), size_t(3));
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for (const QPoint edge : {QPoint(1, 104), QPoint(254, 104), QPoint(21, 104)})
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shown.click(edge);
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QCOMPARE(shown.points(), (std::vector<CurvePoint>{{0, 51}, {20, 0}, {255, 255}}));
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shown.click(QPoint(22, 104));
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QCOMPARE(shown.points().size(), size_t(4));
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// Thirty-two is the most; the right button adds none.
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shown.settings.channels[0] = full();
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shown.controls.synchronize();
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shown.click(QPoint(100, 52));
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QCOMPARE(shown.points().size(), size_t(32));
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shown.settings.channels[0] = {{0, 0}, {255, 255}};
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shown.press(QPoint(100, 104), Qt::RightButton);
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shown.release(QPoint(100, 104), Qt::RightButton);
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QCOMPARE(shown.points().size(), size_t(2));
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}
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void CurvesControlsTests::removeAndResetTheChannelsCurve()
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{
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Curves shown;
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shown.settings.channels[2] = {{0, 20}, {255, 90}};
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shown.click(QPoint(100, 104));
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shown.click(QPoint(200, 52));
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shown.click(QPoint(100, 104));
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QCOMPARE(shown.readout().text(), QString("Input 100 · Output 153"));
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shown.button("Remove point").click();
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QCOMPARE(shown.points(), (std::vector<CurvePoint>{{0, 0}, {200, 204}, {255, 255}}));
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QVERIFY(shown.readout().isHidden() && !shown.button("Remove point").isEnabled());
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// The last point stays: Remove rests there.
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shown.click(QPoint(250, 0));
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QCOMPARE(shown.readout().text(), QString("Input 255 · Output 255"));
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QVERIFY(!shown.button("Remove point").isEnabled());
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shown.click(QPoint(200, 52));
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QCOMPARE(shown.readout().text(), QString("Input 200 · Output 204"));
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shown.click(QPoint(100, 104));
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QCOMPARE(shown.readout().text(), QString("Input 100 · Output 153"));
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// Reset drops the selection, which would read the new end.
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shown.button("Reset curve").click();
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QCOMPARE(shown.points(), (std::vector<CurvePoint>{{0, 0}, {255, 255}}));
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QVERIFY(shown.readout().isHidden());
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QCOMPARE(shown.settings.channels[2], (std::vector<CurvePoint>{{0, 20}, {255, 90}}));
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// A selection gone from elsewhere removes nothing.
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shown.click(QPoint(100, 104));
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shown.click(QPoint(200, 52));
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QCOMPARE(shown.readout().text(), QString("Input 200 · Output 204"));
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shown.settings.channels[0] = {{0, 0}, {255, 255}};
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shown.controls.synchronize();
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QVERIFY(shown.readout().isHidden() && shown.button("Remove point").isEnabled());
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shown.button("Remove point").click();
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QCOMPARE(shown.points(), (std::vector<CurvePoint>{{0, 0}, {255, 255}}));
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}
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void CurvesControlsTests::anotherChannelDropsTheSelection()
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{
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Curves shown;
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shown.click(QPoint(100, 104));
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QVERIFY(shown.button("Remove point").isEnabled());
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QComboBox &channel = *shown.controls.findChild<QComboBox *>();
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channel.setFocus();
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QTest::keyClick(&channel, Qt::Key_Down);
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QCOMPARE(shown.settings.channel, LevelsChannel::red);
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QVERIFY(shown.readout().isHidden() && !shown.button("Remove point").isEnabled());
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// Each channel keeps its own points.
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shown.click(QPoint(50, 156));
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QCOMPARE(shown.settings.channels[1].size(), size_t(3));
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QCOMPARE(shown.settings.channels[0].size(), size_t(3));
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// A change from elsewhere drops it too, mid-drag included.
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shown.press(QPoint(50, 156));
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shown.settings.channel = LevelsChannel::blue;
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shown.controls.synchronize();
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QCOMPARE(channel.currentText(), QString("Blue"));
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QVERIFY(shown.readout().isHidden());
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// The drag starts over: far from both ends, it adds.
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shown.move(QPoint(3, 3));
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QCOMPARE(shown.points().size(), size_t(3));
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QCOMPARE(shown.points().back(), (CurvePoint{255, 255}));
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shown.release(QPoint(3, 3));
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// A point taken, then gone from elsewhere, drags nothing.
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shown.press(QPoint(128, 130));
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QCOMPARE(shown.points().size(), size_t(4));
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shown.settings.channels[3] = {{0, 0}, {255, 255}};
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shown.controls.synchronize();
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shown.move(QPoint(200, 0));
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QCOMPARE(shown.points(), (std::vector<CurvePoint>{{0, 0}, {255, 255}}));
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shown.release(QPoint(200, 0));
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}
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void CurvesControlsTests::theGraphDrawsGridCurveAndPoints()
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{
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Curves shown;
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const QColor window = shown.controls.palette().color(QPalette::Window);
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QImage blended(1, 1, QImage::Format_ARGB32_Premultiplied);
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blended.fill(window);
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QPainter(&blended).fillRect(0, 0, 1, 1, QColor(0, 0, 0, 89));
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const QColor background = blended.pixelColor(0, 0);
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QImage drawn = shown.graph().grab().toImage();
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QCOMPARE(drawn.pixelColor(30, 20), background);
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// Quarter lines a pixel wide at 12%, the edges' too.
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QCOMPARE(drawn.pixelColor(63, 20), QColor(0xa5, 0xa5, 0xa5));
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QCOMPARE(drawn.pixelColor(64, 20), QColor(0x9f, 0x9f, 0x9f));
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for (const QPoint half : {QPoint(0, 20), QPoint(254, 20), QPoint(30, 0), QPoint(30, 64), QPoint(30, 259)})
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QCOMPARE(drawn.pixelColor(half), QColor(0xa2, 0xa2, 0xa2));
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// The whole curve, two wide, antialiased.
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QCOMPARE(drawn.pixelColor(128, 127), QColor(0xca, 0xca, 0xca));
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QCOMPARE(drawn.pixelColor(128, 130), QColor(0xc9, 0xc9, 0xc9));
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QCOMPARE(drawn.pixelColor(200, 55), QColor(Qt::white));
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QCOMPARE(drawn.pixelColor(200, 57), QColor(0xa9, 0xa9, 0xa9));
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// Each channel draws its own curve.
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shown.settings.channel = LevelsChannel::red;
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shown.settings.channels[1] = {{0, 128}, {255, 128}};
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shown.controls.synchronize();
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drawn = shown.graph().grab().toImage();
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QVERIFY(drawn.pixelColor(30, 129).red() == 255 && drawn.pixelColor(30, 229) == background);
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shown.settings.channel = LevelsChannel::rgb;
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// The quarter lines, a twelfth white, over it.
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QVERIFY(drawn.pixelColor(64, 20).red() > background.red() && drawn.pixelColor(64, 20).red() < background.red() + 40);
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QVERIFY(drawn.pixelColor(30, 65).red() > background.red());
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// The curve, white and two wide; points are white dots.
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QVERIFY(drawn.pixelColor(128, 129).red() >= 250);
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shown.settings.channels[0] = {{0, 0}, {100, 204}, {255, 255}};
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shown.controls.synchronize();
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drawn = shown.graph().grab().toImage();
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QCOMPARE(drawn.pixelColor(97, 50), QColor(Qt::white));
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QCOMPARE(drawn.pixelColor(95, 50), background);
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// A change repaints the graph whole.
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QRegion painted;
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struct Spy : QObject {
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QRegion ®ion;
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explicit Spy(QRegion ®ion) : region(region) {}
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bool eventFilter(QObject *, QEvent *event) override
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{
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if (event->type() == QEvent::Paint)
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region += static_cast<QPaintEvent *>(event)->region();
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return false;
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}
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} spy(painted);
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shown.graph().installEventFilter(&spy);
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shown.settings.channels[0] = {{0, 0}, {100, 200}, {255, 255}};
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shown.controls.synchronize();
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QTRY_VERIFY(painted.contains(shown.graph().rect()));
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shown.graph().removeEventFilter(&spy);
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// The chosen one takes the accent.
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shown.click(QPoint(100, 52));
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QCOMPARE(shown.graph().grab().toImage().pixelColor(97, 50), shown.controls.palette().color(QPalette::Highlight));
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}
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QTEST_MAIN(CurvesControlsTests)
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#include "CurvesControlsTests.moc"
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