tst_baseline_text.cpp

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// Copyright (C) 2021 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

#include <qbaselinetest.h>

#include <qwidgetbaselinetest.h>

#include <QtWidgets>

class tst_Text : public QWidgetBaselineTest

    Q_OBJECT

public:

    tst_Text();

    void loadTestFiles();

private slots:

    void tst_render_data();

    void tst_render();

    void tst_differentScriptsBackgrounds();

    void tst_synthesizedObliqueAndRotation();

    void tst_disableEmojiParsing_data();

    void tst_disableEmojiParsing();

    void tst_tightBoundingRect_data();

    void tst_tightBoundingRect();

private:

    QDir htmlDir;

};

tst_Text::tst_Text()

    QString baseDir = QFINDTESTDATA("data/empty.html");

    htmlDir = QDir(QFileInfo(baseDir).path());

void tst_Text::loadTestFiles()

    QTest::addColumn<QString>("html");

    QStringList htmlFiles;

    // first add generic test files

    for (const auto &qssFile : htmlDir.entryList({QStringLiteral("*.html")}, QDir::Files | QDir::Readable))

        htmlFiles << htmlDir.absoluteFilePath(qssFile);

    // then test-function specific files

    const QString testFunction = QString(QTest::currentTestFunction()).remove("tst_").toLower();

    if (htmlDir.cd(testFunction)) {

        for (const auto &htmlFile : htmlDir.entryList({QStringLiteral("*.html")}, QDir::Files | QDir::Readable))

            htmlFiles << htmlDir.absoluteFilePath(htmlFile);

        htmlDir.cdUp();

    for (const auto &htmlFile : htmlFiles) {

        QFileInfo fileInfo(htmlFile);

        QFile file(htmlFile);

        QVERIFY(file.open(QFile::ReadOnly));

        QString html = QString::fromUtf8(file.readAll());

        QBaselineTest::newRow(fileInfo.baseName().toUtf8()) << html;

void tst_Text::tst_render_data()

    loadTestFiles();

void tst_Text::tst_render()

    QFETCH(QString, html);

    QTextDocument textDocument;

    textDocument.setPageSize(QSizeF(800, 600));

    textDocument.setHtml(html);

    QImage image(800, 600, QImage::Format_ARGB32);

    image.fill(Qt::white);

        QPainter painter(&image);

        QAbstractTextDocumentLayout::PaintContext context;

        context.palette.setColor(QPalette::Text, Qt::black);

        textDocument.documentLayout()->draw(&painter, context);

    QBASELINE_TEST(image);

void tst_Text::tst_differentScriptsBackgrounds()

    QTextDocument textDocument;

    textDocument.setPageSize(QSizeF(800, 600));

    textDocument.setHtml(QString::fromUtf8("<i><font style=\"font-size:72px\"><font style=\"background:#FFFF00\">イ雨ｴ</font></font></i>"));

    QImage image(800, 600, QImage::Format_ARGB32);

    image.fill(Qt::white);

        QPainter painter(&image);

        QAbstractTextDocumentLayout::PaintContext context;

        context.palette.setColor(QPalette::Text, Qt::black);

        textDocument.documentLayout()->draw(&painter, context);

    QBASELINE_CHECK(image, "tst_differentScriptsBackgrounds");

void tst_Text::tst_synthesizedObliqueAndRotation()

    QFont font(QString::fromLatin1("Abyssinica SIL"));

    font.setPixelSize(40);

    font.setItalic(true);

    QImage image(800, 600, QImage::Format_ARGB32);

    image.fill(Qt::white);

        QPainter painter(&image);

        painter.setFont(font);

        painter.save();

        painter.translate(200, 450);

        painter.rotate(270);

        painter.drawText(0, 0, QString::fromLatin1("Foobar"));

        painter.restore();

    QBASELINE_CHECK(image, "tst_synthesizedObliqueAndRotation");

void tst_Text::tst_disableEmojiParsing_data()

    QTest::addColumn<QString>("html");

    QStringList htmlFiles;

    // first add generic test files

    for (const auto &qssFile : htmlDir.entryList({QStringLiteral("emoji*.html")}, QDir::Files | QDir::Readable))

        htmlFiles << htmlDir.absoluteFilePath(qssFile);

    // then test-function specific files

    const QString testFunction = QString(QTest::currentTestFunction()).remove("tst_").toLower();

    if (htmlDir.cd(testFunction)) {

        for (const auto &htmlFile : htmlDir.entryList({QStringLiteral("*.html")}, QDir::Files | QDir::Readable))

            htmlFiles << htmlDir.absoluteFilePath(htmlFile);

        htmlDir.cdUp();

    for (const auto &htmlFile : htmlFiles) {

        QFileInfo fileInfo(htmlFile);

        QFile file(htmlFile);

        QVERIFY(file.open(QFile::ReadOnly));

        QString html = QString::fromUtf8(file.readAll());

        QBaselineTest::newRow(fileInfo.baseName().toUtf8()) << html;

void tst_Text::tst_disableEmojiParsing()

    QFETCH(QString, html);

    QTextDocument textDocument;

    textDocument.setPageSize(QSizeF(800, 600));

    textDocument.setHtml(html);

    QTextOption opt = textDocument.defaultTextOption();

    opt.setFlags(QTextOption::DisableEmojiParsing);

    textDocument.setDefaultTextOption(opt);

    QImage image(800, 600, QImage::Format_ARGB32);

    image.fill(Qt::white);

        QPainter painter(&image);

        QAbstractTextDocumentLayout::PaintContext context;

        context.palette.setColor(QPalette::Text, Qt::black);

        textDocument.documentLayout()->draw(&painter, context);

    QBASELINE_CHECK(image, "tst_disableEmojiParsing");

void tst_Text::tst_tightBoundingRect_data()

    QTest::addColumn<QString>("text");

    QTest::addColumn<bool>("italic");

    QTest::addColumn<bool>("underline");

    QBaselineTest::newRow("Latin") << "f" << false << false;

    QBaselineTest::newRow("Italic") << "f" << true << false;

    QBaselineTest::newRow("Underlined") << "f" << false << true;

    QBaselineTest::newRow("Arabic") << QString::fromUtf8("ماً") << false << false;

void tst_Text::tst_tightBoundingRect()

    QFETCH(QString, text);

    QFETCH(bool, italic);

    QFETCH(bool, underline);

    QFont font("Arial");

    font.setPixelSize(440);

    font.setWeight(QFont::Weight::Normal);

    font.setHintingPreference(QFont::PreferVerticalHinting);

    font.setItalic(italic);

    font.setUnderline(underline);

    font.setStyleStrategy(QFont::StyleStrategy(QFont::NoFontMerging | QFont::PreferMatch));

    QFontMetricsF metric(font);

    QRectF box = metric.tightBoundingRect(text);

    QImage image(440, 400, QImage::Format_RGB32);

    image.fill(Qt::white);

        QPainter painter(&image);

        painter.setFont(font);

        painter.translate(QPoint(20, 20));

        painter.save();

        painter.translate(QPoint(20, 20 - box.top()));

        painter.fillRect(box, QColor{ "lightgreen" });

        painter.drawText(0, 0, text);

        painter.restore();

    QBASELINE_CHECK(image, "tst_tightBoundingRect");

QBASELINETEST_MAIN(tst_Text)

#include "tst_baseline_text.moc"