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 "LiveMaskFixtures.h"
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#include <QtTest>
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class ClippingStackTests : public QObject {
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Q_OBJECT
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private slots:
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void init();
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void clippingColorKeepsTheBasesSoftAlphaWithoutABlackFringe();
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void stacksNeedNeighboursInOneFolder();
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void aStackBlendsOnceWithItsBasesMode();
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void laterChildrenCoverEarlierOnes();
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void aStackInheritsThePaintersOpacity();
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};
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void ClippingStackTests::init()
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{
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QTest::failOnWarning(QRegularExpression("saved states|Unbalanced save/restore"));
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}
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void ClippingStackTests::clippingColorKeepsTheBasesSoftAlphaWithoutABlackFringe()
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{
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Scene scene;
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const QUuid base = scene.add(placed(asset({255, 128, 32, 0}, 0)));
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const QUuid top = scene.add(placed(asset({255, 255, 255, 255})));
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scene.layers[top].source = base;
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const QImage clipped = scene.render({base, top});
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QCOMPARE(alphas(clipped), (std::array<int, 4>{255, 128, 32, 0}));
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// Full-strength red under the base's alpha: no black shows through.
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QCOMPARE(reds(clipped), (std::array<int, 4>{255, 128, 32, 0}));
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QCOMPARE(qGreen(clipped.pixel(1, 0)), 0);
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QCOMPARE(qBlue(clipped.pixel(1, 0)), 0);
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scene.layers[top].opacity = 0.5;
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const QImage translucent = scene.render({base, top});
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QCOMPARE(alphas(translucent), (std::array<int, 4>{255, 128, 32, 0}));
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QCOMPARE(reds(translucent), (std::array<int, 4>{127, 64, 16, 0}));
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scene.layers[top].opacity = 1;
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// A translucent child blends with the base's full-strength colour.
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Scene tinted;
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const QUuid red = tinted.add(placed(asset({255, 128, 32, 0})));
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const QUuid grey = tinted.add(placed(solid(2, 2, qRgba(128, 128, 128, 255))));
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tinted.layers[grey].source = red;
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tinted.layers[grey].opacity = 0.5;
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const QImage mixed = tinted.render({red, grey});
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QCOMPARE(mixed.pixel(0, 0), qRgba(192, 64, 64, 255));
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QCOMPARE(mixed.pixel(1, 0), qRgba(96, 32, 32, 128));
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QCOMPARE(mixed.pixel(0, 1), qRgba(24, 8, 8, 32));
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QCOMPARE(mixed.pixel(1, 1), qRgba(0, 0, 0, 0));
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const QUuid background = scene.add(placed(solid(2, 2, qRgba(255, 255, 255, 255))));
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const QImage flattened = scene.render({background, base, top});
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QCOMPARE(alphas(flattened), (std::array<int, 4>{255, 255, 255, 255}));
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QCOMPARE(reds(flattened), (std::array<int, 4>{255, 255, 255, 255}));
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QCOMPARE(qGreen(flattened.pixel(0, 0)), 0);
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QCOMPARE(qGreen(flattened.pixel(1, 0)), 127);
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QCOMPARE(qGreen(flattened.pixel(0, 1)), 223);
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QCOMPARE(qGreen(flattened.pixel(1, 1)), 255);
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}
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void ClippingStackTests::stacksNeedNeighboursInOneFolder()
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{
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// Outside a stack, base and child both paint soft alpha.
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const std::array<int, 4> shared{255, 128, 32, 0}, thickened{255, 192, 60, 0};
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Scene scene;
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const QUuid folder = QUuid::createUuid();
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const QUuid base = scene.add(placed(asset({255, 128, 32, 0}, 0)));
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const QUuid top = scene.add(placed(asset({255, 255, 255, 255})));
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const QUuid other = scene.add(placed(BrushRaster::context(2, 2, false)));
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scene.layers[top].source = base;
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QCOMPARE(alphas(scene.render({base, top})), shared);
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QCOMPARE(alphas(scene.render({base, other, top})), thickened);
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scene.layers[top].parent = folder;
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QCOMPARE(alphas(scene.render({base, top})), thickened);
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scene.layers[base].parent = folder;
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QCOMPARE(alphas(scene.render({base, top})), shared);
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// Clipped neighbours all join; a base clipped itself starts none.
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const QUuid third = scene.add(placed(asset({255, 255, 255, 255})));
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scene.layers[third].source = base;
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scene.layers[third].parent = folder;
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scene.layers[third].opacity = 0.5;
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QCOMPARE(alphas(scene.render({base, top, third})), shared);
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QCOMPARE(scene.drawn[third] > 0, true);
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scene.layers[base].source = other;
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QCOMPARE(alphas(scene.render({base, top, third})), (std::array<int, 4>{0, 0, 0, 0}));
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}
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void ClippingStackTests::aStackBlendsOnceWithItsBasesMode()
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{
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Scene scene;
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const QUuid background = scene.add(placed(solid(2, 2, qRgba(200, 100, 50, 255))));
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const QUuid base = scene.add(placed(asset({255, 128, 32, 0}, 0)));
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const QUuid top = scene.add(placed(solid(2, 2, qRgba(128, 128, 128, 255))));
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scene.layers[top].source = base;
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scene.layers[base].blendMode = LayerBlendMode::multiply;
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const QImage drawn = scene.render({background, base, top});
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// Grey covers the base; the group multiplies through its alpha.
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QCOMPARE(drawn.pixel(0, 0), qRgba(100, 50, 25, 255));
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QCOMPARE(drawn.pixel(1, 1), qRgba(200, 100, 50, 255));
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QCOMPARE(drawn.pixel(1, 0), qRgba(150, 75, 37, 255));
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}
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void ClippingStackTests::laterChildrenCoverEarlierOnes()
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{
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Scene scene;
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const QUuid base = scene.add(placed(asset({255, 128, 32, 0}, 0)));
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const QUuid red = scene.add(placed(solid(2, 2, qRgba(255, 0, 0, 255))));
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const QUuid blue = scene.add(placed(solid(2, 2, qRgba(0, 0, 255, 255))));
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scene.layers[red].source = base;
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scene.layers[blue].source = base;
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QCOMPARE(scene.render({base, red, blue}).pixel(1, 0), qRgba(0, 0, 128, 128));
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QCOMPARE(scene.render({base, blue, red}).pixel(1, 0), qRgba(128, 0, 0, 128));
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}
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void ClippingStackTests::aStackInheritsThePaintersOpacity()
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{
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Scene scene;
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const QUuid base = scene.add(placed(asset({255, 128, 32, 0}, 0)));
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const QUuid top = scene.add(placed(asset({255, 255, 255, 255})));
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scene.layers[top].source = base;
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LiveMaskRenderer live = scene.renderer();
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live.prepareStacks({base, top}, [](QUuid) { return std::nullopt; }, [](QUuid) { return LayerBlendMode::normal; });
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QImage surface = BrushRaster::context(2, 2, false);
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QPainter painter(&surface);
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painter.setOpacity(0.5);
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live.drawComposite(base, painter);
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QCOMPARE(painter.opacity(), 0.5);
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painter.end();
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QCOMPARE(alphas(surface), (std::array<int, 4>{127, 64, 16, 0}));
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QCOMPARE(reds(surface), (std::array<int, 4>{127, 64, 16, 0}));
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}
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QTEST_MAIN(ClippingStackTests)
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#include "ClippingStackTests.moc"
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