Filter › Dither, as Compositor 1.3.3 (12.15)
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#include "Document/BrushStroke.h"
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#include "Document/EditorSession.h"
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#include "UI/ColorPaletteControls.h"
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#include "UI/FilterSheet.h"
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#include <QCheckBox>
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#include <QComboBox>
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#include <QLabel>
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#include <QLayout>
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#include <QLineEdit>
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#include <QProgressBar>
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#include <QSlider>
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#include <QtTest>
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// Swift 1.3.3's Dither: the kind, its colours, its sheet.
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namespace {
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struct Shown {
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EditorSession session;
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QImage image;
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std::unique_ptr<FilterSheet> sheet;
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explicit Shown(int width = 40, int height = 30)
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{
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session.createDocument(width, height);
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image = BrushRaster::context(width, height, false);
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for (int y = 0; y < height; ++y)
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for (int x = 0; x < width; ++x)
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image.setPixelColor(x, y, QColor(x * 255 / std::max(1, width - 1), 120, 200));
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session.insert(ImportedImage(image, image, QStringLiteral("Colour")));
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session.beginFilter(FilterKind::dither);
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sheet = std::make_unique<FilterSheet>(session);
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sheet->show();
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}
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const DitherSettings &dither() const { return session.filterEdit().value().settings.dither; }
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void set(const std::function<void(DitherSettings &)> &change)
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{
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FilterSettings settings = session.filterEdit().value().settings;
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change(settings.dither);
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session.updateFilter(settings, true);
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}
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template <typename Widget> Widget &child(const char *name) const
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{
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auto *found = sheet->findChild<Widget *>(QString::fromLatin1(name));
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if (!found)
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throw std::runtime_error(name);
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return *found;
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}
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// The rows shown, by their titles, sorted.
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QStringList shown() const
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{
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QStringList titles;
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for (const QLabel *label : sheet->findChildren<QLabel *>()) {
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if (label->buddy() && !label->parentWidget()->isHidden() && label->isVisibleTo(sheet.get()))
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titles << label->text();
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}
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for (const QCheckBox *box : sheet->findChildren<QCheckBox *>()) {
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if (box->isVisibleTo(sheet.get()) && box->text() != QLatin1String("Preview"))
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titles << box->text();
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}
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if (child<QWidget>("ditherDark").isVisibleTo(sheet.get()))
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titles << QStringLiteral("Swatches");
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titles.sort();
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return titles;
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}
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};
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QStringList sorted(QStringList titles)
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{
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titles.sort();
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return titles;
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}
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void pick(EditorSession &session, const PaletteColor &color)
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{
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PickerHSB hsb = session.colorPicker().value().hsb;
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hsb.setRGB(color);
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session.setColorPickerHSB(hsb);
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}
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}
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class DitherSheetTests : public QObject {
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Q_OBJECT
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private slots:
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void theKindSitsUnderBloomAndPreviewsWhole();
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void itsCommitIsTheSettingsApplied();
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void theTwoColoursHaveTheirPicker();
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void theControlsFollowTheStyle();
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void theMenusAndFieldsWriteTheSettings();
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void theSheetPreviewsThePickersColour();
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void eachNumberWritesItsOwnSetting();
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void leftTheCharactersShowWhatWasKept();
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void theSlidersReachTheirEnds();
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void aCommitSaysItIsApplying();
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void thePickerRefusesWhenItCannot();
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void anAsciiCommitDrawsOnTheWorker();
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void rowsKeepSwiftsOrderHelpAndScale();
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};
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void DitherSheetTests::theKindSitsUnderBloomAndPreviewsWhole()
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{
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QCOMPARE(rawValue(FilterKind::dither), QString("Dither"));
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const auto at = std::find(allFilterKinds.begin(), allFilterKinds.end(), FilterKind::dither);
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QVERIFY(at != allFilterKinds.end() && *(at - 1) == FilterKind::bloomGlow && *(at + 1) == FilterKind::tonalContrast);
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QVERIFY(!isAutomatic(FilterKind::dither) && !isImageAdjustment(FilterKind::dither));
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// Past the preview limit, Dither still previews at full size.
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EditorSession session;
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session.createDocument(3000, 10);
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const QImage wide = BrushRaster::context(3000, 10, false);
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session.insert(ImportedImage(wide, wide, QStringLiteral("Wide")));
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session.beginFilter(FilterKind::dither);
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QCOMPARE(session.filterEdit().value().previewScale, 1.0);
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QCOMPARE(session.filterEdit().value().previewSource.size(), QSize(3000, 10));
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session.cancelFilter();
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session.beginFilter(FilterKind::gaussianBlur);
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QVERIFY(session.filterEdit().value().previewScale < 1);
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}
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void DitherSheetTests::itsCommitIsTheSettingsApplied()
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{
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Shown shown;
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shown.set([](DitherSettings &dither) {
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dither.style = DitherStyle::bayer4;
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dither.pixelSize = 3;
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});
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const DitherSettings settings = shown.dither();
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bool done = false;
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shown.session.commitFilter([&done] { done = true; });
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QTRY_VERIFY(done);
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QCOMPARE(shown.session.history.undoName(), QString("Dither"));
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QCOMPARE(shown.session.activeLayer().value().asset.value().image(), settings.apply(shown.image));
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}
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void DitherSheetTests::theTwoColoursHaveTheirPicker()
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{
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Shown shown;
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shown.session.openDitherColorPicker(false);
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QCOMPARE(shown.session.colorPicker().value().target.title(), QString("Color Picker (Dither Dark Color)"));
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QVERIFY(shown.session.colorPicker().value().original == PaletteColor::black());
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pick(shown.session, PaletteColor{0, 0, 1});
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shown.session.previewDitherColor();
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QVERIFY(shown.dither().dark == AdjustmentColor(0, 0, 1));
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// Cancel puts it back; OK on the light keeps it.
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shown.session.closeColorPicker(false);
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QVERIFY(shown.dither().dark == AdjustmentColor(0, 0, 0));
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shown.session.openDitherColorPicker(true);
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QCOMPARE(shown.session.colorPicker().value().target.title(), QString("Color Picker (Dither Light Color)"));
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pick(shown.session, PaletteColor{1, 1, 0});
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shown.session.closeColorPicker(true);
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QVERIFY(shown.dither().light == AdjustmentColor(1, 1, 0) && shown.dither().dark == AdjustmentColor(0, 0, 0));
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// The swatches open it; the panel's close takes it along.
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shown.set([](DitherSettings &dither) { dither.colors = DitherColors::twoColors; });
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QTest::mouseClick(&shown.child<SwatchButton>("ditherDark"), Qt::LeftButton);
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QVERIFY(shown.session.colorPicker().has_value() && !shown.session.colorPicker().value().target.light);
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pick(shown.session, PaletteColor{1, 0, 0});
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shown.session.previewDitherColor();
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shown.session.cancelFilter();
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QVERIFY(!shown.session.colorPicker() && !shown.session.filterEdit());
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// Not over another filter.
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shown.session.beginFilter(FilterKind::gaussianBlur);
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shown.session.openDitherColorPicker(true);
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QVERIFY(!shown.session.colorPicker());
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}
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void DitherSheetTests::theControlsFollowTheStyle()
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{
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Shown shown;
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const QStringList common{"Style", "Pixel Size", "Density", "Contrast", "Colors", "Pixel Shape"};
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QCOMPARE(shown.shown(), sorted(common + QStringList{"Tones", "Diffusion"}));
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shown.set([](DitherSettings &dither) { dither.style = DitherStyle::bayer8; });
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QCOMPARE(shown.shown(), sorted(common + QStringList{"Tones"}));
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shown.set([](DitherSettings &dither) { dither.style = DitherStyle::lines; });
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QCOMPARE(shown.shown(), sorted(common + QStringList{"Cell Size", "Angle", "Light on Dark"}));
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shown.set([](DitherSettings &dither) { dither.style = DitherStyle::ascii; });
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QCOMPARE(shown.shown(), sorted(common + QStringList{"Cell Size", "Characters", "Light on Dark"}));
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shown.set([](DitherSettings &dither) { dither.style = DitherStyle::patterns; });
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QCOMPARE(shown.shown(), sorted(common + QStringList{"Light on Dark"}));
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// Pixel Shape needs chunky pixels; the swatches, Two Colors.
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shown.set([](DitherSettings &dither) {
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dither.pixelSize = 1;
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dither.colors = DitherColors::twoColors;
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});
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QCOMPARE(shown.shown(), sorted(QStringList{"Style", "Pixel Size", "Density", "Contrast", "Colors", "Light on Dark", "Swatches"}));
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// Style's menu: ten looks in four groups.
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QComboBox &style = shown.child<QComboBox>("ditherStyle");
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QStringList items;
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for (int index = 0; index < style.count(); ++index)
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items << (style.itemText(index).isEmpty() ? QStringLiteral("—") : style.itemText(index));
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QCOMPARE(items, (QStringList{"Atkinson (Classic Mac)", "Floyd–Steinberg", "—", "Bayer 2 × 2", "Bayer 4 × 4", "Bayer 8 × 8", "—", "Halftone Dots",
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"Halftone Lines", "Halftone Diamonds", "—", "Mac Patterns", "ASCII"}));
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QCOMPARE(style.currentText(), QString("Mac Patterns"));
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// Its quick preview never shows the busy line.
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QVERIFY(!shown.child<QProgressBar>("filterSpinner").isVisibleTo(shown.sheet.get()));
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}
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void DitherSheetTests::theMenusAndFieldsWriteTheSettings()
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{
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Shown shown;
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QComboBox &style = shown.child<QComboBox>("ditherStyle");
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const int ascii = style.findData(int(DitherStyle::ascii));
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style.setCurrentIndex(ascii);
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emit style.activated(ascii);
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QVERIFY(shown.dither().style == DitherStyle::ascii);
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QComboBox &colors = shown.child<QComboBox>("ditherColors");
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colors.setCurrentIndex(2);
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emit colors.activated(2);
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QVERIFY(shown.dither().colors == DitherColors::original);
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QComboBox &shape = shown.child<QComboBox>("ditherPixelShape");
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shape.setCurrentIndex(1);
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emit shape.activated(1);
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QVERIFY(shown.dither().pixelShape == DitherPixelShape::dot);
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// Characters as typed, stored without line breaks.
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QLineEdit &characters = shown.child<QLineEdit>("ditherCharacters");
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QCOMPARE(characters.text(), DitherSettings::defaultCharacters());
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characters.setFocus();
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characters.selectAll();
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QTest::keyClicks(&characters, QStringLiteral("#o."));
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QCOMPARE(shown.dither().characters, QString("#o."));
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// Unfocused, it shows the settings as they stand.
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characters.clearFocus();
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shown.set([](DitherSettings &dither) { dither.characters = QStringLiteral("xy"); });
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QCOMPARE(characters.text(), QString("xy"));
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}
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void DitherSheetTests::theSheetPreviewsThePickersColour()
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{
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Shown shown;
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shown.set([](DitherSettings &dither) { dither.colors = DitherColors::twoColors; });
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for (const bool light : {false, true}) {
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QTest::mouseClick(&shown.child<SwatchButton>(light ? "ditherLight" : "ditherDark"), Qt::LeftButton);
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QVERIFY(shown.session.colorPicker().has_value() && shown.session.colorPicker().value().target.light == light);
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// The sheet previews the working colour itself.
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pick(shown.session, PaletteColor{0, 1, 0});
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QVERIFY((light ? shown.dither().light : shown.dither().dark) == AdjustmentColor(0, 1, 0));
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shown.session.closeColorPicker(false);
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QVERIFY(shown.dither().dark == AdjustmentColor(0, 0, 0) && shown.dither().light == AdjustmentColor(1, 1, 1));
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}
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// The filter's OK takes an open picker's colour along.
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QTest::mouseClick(&shown.child<SwatchButton>("ditherLight"), Qt::LeftButton);
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pick(shown.session, PaletteColor{1, 0, 0});
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DitherSettings expected = shown.dither();
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expected.light = AdjustmentColor(1, 0, 0);
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bool done = false;
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shown.session.commitFilter([&done] { done = true; });
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QTRY_VERIFY(done);
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QVERIFY(!shown.session.colorPicker());
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QCOMPARE(shown.session.activeLayer().value().asset.value().image(), expected.apply(shown.image));
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}
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void DitherSheetTests::eachNumberWritesItsOwnSetting()
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{
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Shown shown;
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shown.set([](DitherSettings &dither) { dither.style = DitherStyle::lines; });
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struct Row {
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const char *field;
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double DitherSettings::*setting;
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const char *typed;
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double expected;
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};
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const Row rows[] = {{"pixelSizeField", &DitherSettings::pixelSize, "5", 5}, {"cellSizeField", &DitherSettings::cellSize, "12", 12},
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{"angleField", &DitherSettings::angle, "-30", -30}, {"densityField", &DitherSettings::density, "25", 25},
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{"contrastField", &DitherSettings::contrast, "-40", -40}};
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for (const Row &row : rows) {
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const DitherSettings before = shown.dither();
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QLineEdit &field = shown.child<QLineEdit>(row.field);
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field.setFocus();
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field.selectAll();
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QTest::keyClicks(&field, QString::fromLatin1(row.typed));
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QTest::keyClick(&field, Qt::Key_Return);
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DitherSettings expected = before;
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expected.*row.setting = row.expected;
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QVERIFY2(shown.dither() == expected, row.field);
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}
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// Tones and Diffusion under a diffusion style.
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shown.set([](DitherSettings &dither) { dither.style = DitherStyle::floydSteinberg; });
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for (const auto &[name, setting, value] : {std::tuple("tonesField", &DitherSettings::levels, 4.0), std::tuple("diffusionField", &DitherSettings::diffusion, 60.0)}) {
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QLineEdit &field = shown.child<QLineEdit>(name);
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field.setFocus();
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field.selectAll();
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QTest::keyClicks(&field, QString::number(value));
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QTest::keyClick(&field, Qt::Key_Return);
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QCOMPARE(shown.dither().*setting, value);
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}
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// Light on Dark, under marks.
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shown.set([](DitherSettings &dither) { dither.style = DitherStyle::dots; });
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QCheckBox *glow = nullptr;
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for (QCheckBox *box : shown.sheet->findChildren<QCheckBox *>())
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glow = box->text() == QLatin1String("Light on Dark") ? box : glow;
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QVERIFY(glow && glow->isChecked());
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glow->click();
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QVERIFY(!shown.dither().lightOnDark);
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}
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void DitherSheetTests::leftTheCharactersShowWhatWasKept()
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{
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Shown shown;
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QVERIFY(QTest::qWaitForWindowActive(shown.sheet.get()));
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shown.session.updateFilter(shown.session.filterEdit().value().settings, false);
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shown.set([](DitherSettings &dither) { dither.style = DitherStyle::ascii; });
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shown.session.updateFilter(shown.session.filterEdit().value().settings, false);
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QLineEdit &characters = shown.child<QLineEdit>("ditherCharacters");
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characters.setFocus();
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QTRY_VERIFY(characters.hasFocus());
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characters.selectAll();
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QTest::keyClicks(&characters, QString(70, u'x'));
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// Kept to 64; the typing shows until left.
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QCOMPARE(shown.dither().characters, QString(64, u'x'));
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QCOMPARE(characters.text(), QString(70, u'x'));
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shown.child<QLineEdit>("densityField").setFocus();
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QTRY_VERIFY(!characters.hasFocus());
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QCOMPARE(characters.text(), QString(64, u'x'));
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QVERIFY(!shown.session.filterEdit().value().preview);
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}
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void DitherSheetTests::theSlidersReachTheirEnds()
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{
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Shown shown;
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shown.set([](DitherSettings &dither) { dither.style = DitherStyle::lines; });
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const std::tuple<const char *, double DitherSettings::*, double, double> rows[] = {
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{"pixelSizeSlider", &DitherSettings::pixelSize, 1, 32}, {"cellSizeSlider", &DitherSettings::cellSize, 4, 64},
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{"angleSlider", &DitherSettings::angle, -90, 90}, {"densitySlider", &DitherSettings::density, -100, 100},
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{"contrastSlider", &DitherSettings::contrast, -100, 100}};
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for (const auto &[name, setting, low, high] : rows) {
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QSlider &slider = shown.child<QSlider>(name);
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slider.setValue(slider.maximum());
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QCOMPARE(shown.dither().*setting, high);
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slider.setValue(slider.minimum());
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QCOMPARE(shown.dither().*setting, low);
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}
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QCOMPARE(shown.child<QSlider>("pixelSizeSlider").parentWidget()->toolTip(),
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QString("Make each dithered pixel this many pixels across, for a chunky old-screen look"));
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shown.set([](DitherSettings &dither) { dither.style = DitherStyle::atkinson; });
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for (const auto &[name, setting, low, high] : {std::tuple("tonesSlider", &DitherSettings::levels, 2.0, 8.0),
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std::tuple("diffusionSlider", &DitherSettings::diffusion, 0.0, 100.0)}) {
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QSlider &slider = shown.child<QSlider>(name);
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slider.setValue(slider.maximum());
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QCOMPARE(shown.dither().*setting, high);
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slider.setValue(slider.minimum());
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QCOMPARE(shown.dither().*setting, low);
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}
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}
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void DitherSheetTests::aCommitSaysItIsApplying()
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{
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// Quick previews never show the line; a commit does.
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Shown shown;
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bool done = false;
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shown.session.commitFilter([&done] { done = true; });
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QVERIFY(shown.child<QProgressBar>("filterSpinner").isVisibleTo(shown.sheet.get()));
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QCOMPARE(shown.child<QLabel>("filterActivity").text(), QString("Applying…"));
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QTRY_VERIFY(done);
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}
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void DitherSheetTests::thePickerRefusesWhenItCannot()
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{
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Shown shown;
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// Busy, the palette rests.
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shown.session.setIsProjectBusy(true);
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shown.session.openDitherColorPicker(false);
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QVERIFY(!shown.session.colorPicker());
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shown.session.setIsProjectBusy(false);
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// Another picker open stays so.
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shown.session.openDitherColorPicker(true);
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shown.session.openDitherColorPicker(false);
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QVERIFY(shown.session.colorPicker().value().target.light);
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shown.session.closeColorPicker(false);
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// A style change keeps an open picker on its colour.
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shown.session.openDitherColorPicker(false);
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shown.set([](DitherSettings &dither) { dither.style = DitherStyle::ascii; });
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pick(shown.session, PaletteColor{1, 0, 1});
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shown.session.previewDitherColor();
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QVERIFY(shown.dither().dark == AdjustmentColor(1, 0, 1) && shown.dither().style == DitherStyle::ascii);
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shown.session.closeColorPicker(false);
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QVERIFY(shown.dither().dark == AdjustmentColor(0, 0, 0));
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}
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void DitherSheetTests::anAsciiCommitDrawsOnTheWorker()
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{
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// Glyphs are drawn off the UI thread, in the commit.
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Shown shown(96, 48);
|
||||
shown.set([](DitherSettings &dither) {
|
||||
dither.style = DitherStyle::ascii;
|
||||
dither.cellSize = 12;
|
||||
dither.pixelSize = 1;
|
||||
});
|
||||
const DitherSettings settings = shown.dither();
|
||||
bool done = false;
|
||||
shown.session.commitFilter([&done] { done = true; });
|
||||
QTRY_VERIFY(done);
|
||||
QCOMPARE(shown.session.activeLayer().value().asset.value().image(), settings.apply(shown.image));
|
||||
}
|
||||
|
||||
void DitherSheetTests::rowsKeepSwiftsOrderHelpAndScale()
|
||||
{
|
||||
Shown shown;
|
||||
// The shown rows, in the column's order, with their help.
|
||||
const auto rows = [&shown] {
|
||||
QStringList titles;
|
||||
QLayout *column = shown.sheet->layout();
|
||||
for (int index = 0; index < column->count(); ++index) {
|
||||
QWidget *row = column->itemAt(index)->widget();
|
||||
if (!row || row->isHidden())
|
||||
continue;
|
||||
if (auto *box = qobject_cast<QCheckBox *>(row); box && box->text() != QLatin1String("Preview"))
|
||||
titles << box->text() + u'|' + box->toolTip();
|
||||
for (QLabel *label : row->findChildren<QLabel *>(QString(), Qt::FindDirectChildrenOnly)) {
|
||||
if (label->buddy())
|
||||
titles << label->text() + u'|' + row->toolTip();
|
||||
}
|
||||
}
|
||||
return titles;
|
||||
};
|
||||
QCOMPARE(rows(), (QStringList{"Style|", "Pixel Size|Make each dithered pixel this many pixels across, for a chunky old-screen look",
|
||||
"Tones|Tones per channel: 2 is pure black and white",
|
||||
"Diffusion|How much of each pixel's error spreads to its neighbors. Less gives flatter areas",
|
||||
"Density|More ink (darker) or less before dithering", "Contrast|", "Colors|",
|
||||
"Pixel Shape|Draw each chunky pixel as a solid square, or as a round dot like a dot-matrix screen"}));
|
||||
shown.set([](DitherSettings &dither) { dither.style = DitherStyle::ascii; });
|
||||
QCOMPARE(rows().mid(2, 2), (QStringList{"Cell Size|", "Characters|The characters to draw with, in any order: each spot gets the one whose ink best matches its tone"}));
|
||||
QCOMPARE(rows().last(), QString("Light on Dark|Draw the marks for the light tones on the dark color, like a glowing screen"));
|
||||
// Linear: half the Pixel Size travel is 16.5, so 17.
|
||||
QSlider &pixels = shown.child<QSlider>("pixelSizeSlider");
|
||||
pixels.setValue(pixels.maximum() / 2);
|
||||
QCOMPARE(shown.dither().pixelSize, 17.0);
|
||||
// Across Colors a picker keeps on; without an edit, none.
|
||||
shown.set([](DitherSettings &dither) { dither.colors = DitherColors::twoColors; });
|
||||
shown.session.updateFilter(shown.session.filterEdit().value().settings, false);
|
||||
QTest::mouseClick(&shown.child<SwatchButton>("ditherDark"), Qt::LeftButton);
|
||||
FilterSettings original = shown.session.filterEdit().value().settings;
|
||||
original.dither.colors = DitherColors::original;
|
||||
shown.session.updateFilter(original, false);
|
||||
pick(shown.session, PaletteColor{0, 1, 1});
|
||||
QVERIFY(shown.dither().dark == AdjustmentColor(0, 1, 1) && shown.dither().colors == DitherColors::original);
|
||||
QVERIFY(!shown.session.filterEdit().value().preview);
|
||||
shown.session.closeColorPicker(false);
|
||||
QVERIFY(shown.dither().dark == AdjustmentColor(0, 0, 0));
|
||||
shown.session.cancelFilter();
|
||||
shown.session.openDitherColorPicker(false);
|
||||
QVERIFY(!shown.session.colorPicker());
|
||||
}
|
||||
|
||||
QTEST_MAIN(DitherSheetTests)
|
||||
#include "DitherSheetTests.moc"
|
||||
Reference in new issue
Block a user