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 "Document/Distort.h"
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#include "IO/ImageExporter.h"
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#include "SessionFixtures.h"
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#include <QtTest>
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// Masks under a distortion: along with the layer, or alone.
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namespace {
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// The next thumbnail fails, as an allocation might.
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bool failNextScale = false;
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}
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// Takes libQt6Gui's place, as ProjectReplaceTests takes libc's.
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QImage QImage::scaled(const QSize &size, Qt::AspectRatioMode aspectMode, Qt::TransformationMode mode) const
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{
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if (failNextScale) {
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failNextScale = false;
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return QImage();
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}
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if (size == this->size() && aspectMode == Qt::IgnoreAspectRatio && mode == Qt::SmoothTransformation)
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return *this;
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// Every scale these tests make is the image's own size.
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throw std::logic_error("DistortTests scale nothing");
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}
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namespace {
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const Corners shape = {QPointF(10, 10), QPointF(60, 10), QPointF(30, 30), QPointF(10, 30)};
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QImage red(int width, int height)
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{
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QImage image(width, height, QImage::Format_RGBA8888_Premultiplied);
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image.fill(Qt::red);
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return image;
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}
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QUuid insertAt(EditorSession &session, const QImage &image, QPointF origin)
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{
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session.insert(ImportedImage(image, image, "Image"));
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const QUuid id = session.activeLayerID().value();
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rewrite(session, [&](ProjectSnapshot &snapshot) { record(snapshot, id).transform.origin = origin; });
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return id;
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}
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int alphaAt(const EditorSession &session, int x, int y)
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{
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return ImageExporter::render(session.projectSnapshot().value()).image.pixelColor(x, y).alpha();
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}
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}
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class DistortMaskTests : public QObject {
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Q_OBJECT
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private slots:
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void masksFollowADistortionOrStayPut();
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void anUnlinkedMaskDistortsOnItsOwn();
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};
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void DistortMaskTests::masksFollowADistortionOrStayPut()
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{
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EditorSession session;
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session.createDocument(100, 60);
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const QUuid id = insertAt(session, red(20, 20), QPointF(10, 10));
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QImage half(20, 20, QImage::Format_Grayscale8);
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half.fill(0);
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for (int y = 0; y < 20; ++y)
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std::fill_n(half.scanLine(y), 10, uchar(255));
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rewrite(session, [&](ProjectSnapshot &snapshot) { setMask(snapshot, id, LayerMask::assetFrom(half)); });
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session.selectTool(NavigationTool::move);
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session.beginTransform(false);
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session.beginDistort();
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session.previewCorners(shape);
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// The preview carries the linked mask, cached while unchanged.
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const std::optional<DistortPreview> preview = session.distortPreview(layerWith(session, id));
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QCOMPARE(preview.value().transform, (LayerTransform{.origin = {10, 10}, .size = {50, 20}}));
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QCOMPARE(preview.value().image.size(), QSize(50, 20));
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QCOMPARE(preview.value().mask.value().size(), QSize(50, 20));
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QCOMPARE(int(preview.value().mask.value().constScanLine(2)[5]), 255);
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QCOMPARE(int(preview.value().mask.value().constScanLine(2)[45]), 0);
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QCOMPARE(session.distortPreview(layerWith(session, id)).value().image.cacheKey(), preview.value().image.cacheKey());
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QVERIFY(!session.displayedMaskPlacement(layerWith(session, id)).has_value());
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QVERIFY(!session.maskDistortPreview(layerWith(session, id)).has_value());
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session.previewCorners({shape[0], QPointF(70, 10), shape[2], shape[3]});
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QVERIFY(session.distortPreview(layerWith(session, id)).value().image.cacheKey() != preview.value().image.cacheKey());
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session.previewCorners(shape);
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session.commitTransform();
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const ImageLayer distorted = layerWith(session, id);
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QCOMPARE(distorted.mask.value().asset.size(), QSize(50, 20));
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QVERIFY(!distorted.mask.value().placement.has_value());
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QCOMPARE(alphaAt(session, 15, 15), 255);
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QCOMPARE(alphaAt(session, 55, 12), 0);
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session.undo();
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// An unlinked mask keeps its place on the document.
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rewrite(session, [&](ProjectSnapshot &snapshot) { record(snapshot, id).maskLinked = false; });
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session.beginTransform(false);
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session.beginDistort();
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QCOMPARE(session.displayedMaskPlacement(layerWith(session, id)), std::optional(layerWith(session, id).transform));
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session.previewCorners(shape);
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QCOMPARE(session.distortPreview(layerWith(session, id)).value().mask.value().size(), QSize(50, 20));
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session.commitTransform();
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QCOMPARE(layerWith(session, id).mask.value().placement, std::optional(LayerTransform{.origin = {10, 10}, .size = {20, 20}}));
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QCOMPARE(layerWith(session, id).mask.value().asset.size(), QSize(20, 20));
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session.undo();
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// A linked mask apart under a fold keeps its place.
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const LayerTransform apart{.origin = {12, 12}, .size = {10, 10}};
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rewrite(session, [&](ProjectSnapshot &snapshot) {
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record(snapshot, id).maskLinked = true;
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record(snapshot, id).maskPlacement = apart;
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});
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session.beginTransform();
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session.previewTransform({.origin = {20, 10}, .size = {20, 20}});
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session.beginDistort();
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session.previewCorners({QPointF(20, 10), QPointF(40, 10), QPointF(22, 12), QPointF(20, 30)});
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const DistortPreview folded = session.distortPreview(layerWith(session, id)).value();
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const LayerMask owned = layerWith(session, id).mask.value();
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QCOMPARE(folded.mask.value(), owned.clipImage(apart, folded.transform, folded.image.width(), folded.image.height(), 2048).value());
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session.cancelTransform();
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// A convex shape carries a placed linked mask along, resampled.
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rewrite(session, [&](ProjectSnapshot &snapshot) { record(snapshot, id).maskPlacement = apart; });
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session.beginTransform();
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session.beginDistort();
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session.previewCorners(shape);
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const ImageLayer before = layerWith(session, id);
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const Corners carried = DistortWarp::carried(apart, before.transform, shape);
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QVERIFY(DistortWarp::isConvex(carried));
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const DistortWarp::Warped expected = DistortWarp::warpMask(before.mask.value().asset.image(), apart, carried, LayerMask::background(before.mask.value().asset.thumbnail));
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const DistortPreview carriedPreview = session.distortPreview(before).value();
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QCOMPARE(carriedPreview.mask.value(), LayerMask(ImportedImage(expected.image, before.mask.value().asset.thumbnail, "m")).clipImage(expected.transform, carriedPreview.transform, 50, 20, 2048).value());
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QVERIFY(carriedPreview.mask.value() != before.mask.value().clipImage(apart, carriedPreview.transform, 50, 20, 2048).value());
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session.commitTransform();
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const LayerMask moved = layerWith(session, id).mask.value();
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QCOMPARE(moved.placement, std::optional(expected.transform));
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QCOMPARE(moved.asset.image(), expected.image);
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QVERIFY(moved.isLinked);
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QVERIFY(expected.transform.origin != apart.origin);
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session.undo();
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// A placement too wide to warp: the layer still previews.
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const LayerTransform wide{.origin = {12, 12}, .size = {40'000, 10}};
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rewrite(session, [&](ProjectSnapshot &snapshot) { record(snapshot, id).maskPlacement = wide; });
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session.beginTransform();
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session.beginDistort();
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session.previewCorners(shape);
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const DistortPreview kept = session.distortPreview(layerWith(session, id)).value();
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QCOMPARE(kept.image.size(), QSize(50, 20));
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QCOMPARE(kept.mask.value(), layerWith(session, id).mask.value().clipImage(wide, kept.transform, 50, 20, 2048).value());
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}
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void DistortMaskTests::anUnlinkedMaskDistortsOnItsOwn()
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{
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EditorSession session;
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session.createDocument(100, 60);
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const QUuid id = insertAt(session, red(20, 20), QPointF(10, 10));
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// A white block in a black border: black background.
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QImage block(20, 20, QImage::Format_Grayscale8);
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block.fill(0);
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for (int y = 2; y < 18; ++y)
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std::fill_n(block.scanLine(y) + 2, 8, uchar(255));
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rewrite(session, [&](ProjectSnapshot &snapshot) {
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setMask(snapshot, id, LayerMask::assetFrom(block));
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record(snapshot, id).maskLinked = false;
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});
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session.selectLayerTarget(id, true);
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QVERIFY(session.transformTargetsMask());
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session.beginTransform();
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session.beginDistort();
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QVERIFY(session.transformEdit().value().mask && session.transformEdit().value().corners.has_value());
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// The mask shrunk into the layer's top left quarter.
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const Corners quarter = {QPointF(10, 10), QPointF(20, 10), QPointF(20, 20), QPointF(10, 20)};
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session.previewCorners(quarter);
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// The preview is the warped mask in the layer's grid.
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const std::optional<QImage> preview = session.maskDistortPreview(layerWith(session, id));
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QCOMPARE(preview.value().size(), QSize(20, 20));
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QCOMPARE(int(preview.value().constScanLine(3)[3]), 255);
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QCOMPARE(int(preview.value().constScanLine(15)[15]), 0);
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QCOMPARE(session.maskDistortPreview(layerWith(session, id)).value().cacheKey(), preview.value().cacheKey());
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QVERIFY(!session.distortPreview(layerWith(session, id)).has_value());
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session.previewCorners({QPointF(10, 10), QPointF(22, 10), QPointF(20, 20), QPointF(10, 20)});
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QVERIFY(session.maskDistortPreview(layerWith(session, id)).value().cacheKey() != preview.value().cacheKey());
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session.previewCorners(quarter);
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const int count = session.history.undoCount();
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session.commitTransform();
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QCOMPARE(session.history.undoName(), QString("Distort Layer Mask"));
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QCOMPARE(session.history.undoCount(), count + 1);
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const LayerMask mask = layerWith(session, id).mask.value();
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QCOMPARE(mask.asset.size(), QSize(10, 10));
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QCOMPARE(mask.placement, std::optional(LayerTransform{.origin = {10, 10}, .size = {10, 10}}));
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QVERIFY(!mask.isLinked);
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QCOMPARE(layerWith(session, id).transform.size, QSizeF(20, 20));
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// Past the mask, its black background hides the layer.
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QCOMPARE(alphaAt(session, 13, 13), 255);
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QCOMPARE(alphaAt(session, 25, 25), 0);
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// A mask apart keeps its place when its corners stay.
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session.beginTransform();
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session.beginDistort();
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session.commitTransform();
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QCOMPARE(session.history.undoName(), QString("Distort Layer Mask"));
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QCOMPARE(layerWith(session, id).mask.value().placement, std::optional(LayerTransform{.origin = {10, 10}, .size = {10, 10}}));
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// A warp that fails opens no transaction: undo stays usable.
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const int steps = session.history.undoCount();
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session.beginTransform();
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session.beginDistort();
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session.previewCorners({QPointF(10, 10), QPointF(40'010, 10), QPointF(40'010, 20), QPointF(10, 20)});
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session.commitTransform();
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QVERIFY(session.brushError().has_value());
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QVERIFY(!session.transformEdit().has_value() && session.canUndo());
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QCOMPARE(session.history.undoCount(), steps);
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session.setBrushError(std::nullopt);
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// A thumbnail failing after the warp opens no transaction.
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session.beginTransform();
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session.beginDistort();
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session.previewCorners({QPointF(10, 10), QPointF(22, 10), QPointF(20, 20), QPointF(10, 20)});
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failNextScale = true;
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session.commitTransform();
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QVERIFY(!failNextScale);
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QVERIFY(session.brushError().has_value());
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QVERIFY(!session.transformEdit().has_value() && session.canUndo());
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QCOMPARE(session.history.undoCount(), steps);
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QCOMPARE(layerWith(session, id).mask.value().asset.size(), QSize(10, 10));
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session.setBrushError(std::nullopt);
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session.selectLayer(id);
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session.toggleLayerVisibility(id);
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QCOMPARE(session.history.undoCount(), steps + 1);
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session.toggleLayerVisibility(id);
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// One covering its layer stays covering it, resampled.
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const QUuid other = insertAt(session, red(20, 20), QPointF(50, 30));
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rewrite(session, [&](ProjectSnapshot &snapshot) {
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setMask(snapshot, other, LayerMask::assetFrom(block));
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record(snapshot, other).maskLinked = false;
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});
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session.selectLayerTarget(other, true);
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session.beginTransform();
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session.beginDistort();
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session.commitTransform();
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QCOMPARE(session.history.undoName(), QString("Distort Layer Mask"));
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QCOMPARE(layerWith(session, other).mask.value().placement, std::nullopt);
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QCOMPARE(layerWith(session, other).mask.value().asset.size(), QSize(20, 20));
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QVERIFY(layerWith(session, other).mask.value().asset.identity() != LayerMask::assetFrom(block).identity());
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}
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QTEST_GUILESS_MAIN(DistortMaskTests)
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#include "DistortMaskTests.moc"
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