Add manual test case for verifying our text rendering
Allows comparing Qt's text rendering to the native rendering. Change-Id: I56f015fb64df3f70c33db58891876c325cbbc55d Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io> Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
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Tor Arne Vestbø
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commit
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310
tests/manual/textrendering/nativetext/main.cpp
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310
tests/manual/textrendering/nativetext/main.cpp
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/****************************************************************************
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**
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** Copyright (C) 2018 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the test suite of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:GPL-EXCEPT$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 as published by the Free Software
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** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtWidgets>
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#ifdef Q_OS_DARWIN
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#include <private/qcoregraphics_p.h>
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#include <private/qcore_mac_p.h>
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#include <Foundation/Foundation.h>
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#include <private/qfont_p.h>
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#include <private/qfontengine_p.h>
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#endif
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static int s_mode;
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static QString s_text = QString::fromUtf8("The quick brown \xF0\x9F\xA6\x8A jumps over the lazy \xF0\x9F\x90\xB6");
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class TextRenderer : public QWidget
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{
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Q_OBJECT
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public:
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enum RenderingMode { QtRendering, NativeRendering };
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Q_ENUM(RenderingMode);
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TextRenderer(qreal pointSize, const QString &text, const QColor &textColor = QColor(), const QColor &bgColor = QColor())
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: m_text(text)
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{
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if (pointSize) {
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QFont f = font();
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f.setPointSize(pointSize);
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setFont(f);
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}
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if (textColor.isValid()) {
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QPalette p = palette();
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p.setColor(QPalette::Text, textColor);
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setPalette(p);
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}
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if (bgColor.isValid()) {
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QPalette p = palette();
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p.setColor(QPalette::Window, bgColor);
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setPalette(p);
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}
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}
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QString text() const
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{
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return !m_text.isNull() ? m_text : s_text;
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}
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QSize sizeHint() const override
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{
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QFontMetrics fm = fontMetrics();
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return QSize(fm.boundingRect(text()).width(), fm.height());
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}
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bool event(QEvent * event) override
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{
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if (event->type() == QEvent::ToolTip) {
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QString toolTip;
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QDebug debug(&toolTip);
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debug << "textColor =" << palette().color(QPalette::Text) << "bgColor =" << palette().color(QPalette::Window);
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setToolTip(toolTip);
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}
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return QWidget::event(event);
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}
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void paintEvent(QPaintEvent *) override
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{
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QImage image(size() * devicePixelRatio(), QImage::Format_ARGB32_Premultiplied);
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image.setDevicePixelRatio(devicePixelRatio());
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QPainter p(&image);
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p.fillRect(QRect(0, 0, image.width(), image.height()), palette().window().color());
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const int ascent = fontMetrics().ascent();
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p.setPen(Qt::magenta);
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p.drawLine(QPoint(0, ascent), QPoint(width(), ascent));
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p.end();
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if (s_mode == QtRendering)
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renderQtText(image);
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else
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renderNativeText(image);
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QPainter wp(this);
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wp.drawImage(QPoint(0, 0), image);
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}
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void renderQtText(QImage &image)
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{
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QPainter p(&image);
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const int ascent = fontMetrics().ascent();
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p.setPen(palette().text().color());
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QFont f = font();
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f.resolve(-1);
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p.setFont(f);
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p.drawText(QPoint(0, ascent), text());
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}
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void renderNativeText(QImage &image)
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{
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#ifdef Q_OS_DARWIN
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QMacAutoReleasePool pool;
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QMacCGContext ctx(&image);
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const auto *fontEngine = QFontPrivate::get(font())->engineForScript(QChar::Script_Common);
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Q_ASSERT(fontEngine);
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if (fontEngine->type() == QFontEngine::Multi) {
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fontEngine = static_cast<const QFontEngineMulti *>(fontEngine)->engine(0);
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Q_ASSERT(fontEngine);
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}
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Q_ASSERT(fontEngine->type() == QFontEngine::Mac);
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QColor textColor = palette().text().color();
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auto nsColor = [NSColor colorWithSRGBRed:textColor.redF()
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green:textColor.greenF()
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blue:textColor.blueF()
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alpha:textColor.alphaF()];
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if (font().styleStrategy() & QFont::NoAntialias)
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CGContextSetShouldAntialias(ctx, false);
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// Retain count already tracked by QMacCGContext above
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NSGraphicsContext.currentContext = [NSGraphicsContext graphicsContextWithCGContext:ctx flipped:YES];
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[text().toNSString() drawAtPoint:CGPointZero withAttributes:@{
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NSFontAttributeName : (NSFont *)fontEngine->handle(),
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NSForegroundColorAttributeName : nsColor
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}];
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NSGraphicsContext.currentContext = nil;
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#endif
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}
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public:
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RenderingMode m_mode = QtRendering;
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QString m_text;
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};
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class TestWidget : public QWidget
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{
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Q_OBJECT
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public:
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TestWidget()
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{
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auto *mainLayout = new QVBoxLayout;
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m_previews = new QWidget;
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m_previews->setLayout(new QHBoxLayout);
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for (int i = 0; i < 6; ++i) {
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auto *layout = new QVBoxLayout;
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QString text;
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if (i > 0)
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text = "ABC";
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QPair<QColor, QColor> color = [i] {
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switch (i) {
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case 0: return qMakePair(QColor(), QColor());
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case 1: return qMakePair(QColor(Qt::black), QColor(Qt::white));
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case 2: return qMakePair(QColor(Qt::white), QColor(Qt::black));
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case 3: return qMakePair(QColor(Qt::green), QColor(Qt::red));
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case 4: return qMakePair(QColor(0, 0, 0, 128), QColor(Qt::white));
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case 5: return qMakePair(QColor(255, 255, 255, 128), QColor(Qt::black));
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default: return qMakePair(QColor(), QColor());
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}
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}();
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layout->addWidget(new TextRenderer(12, text, color.first, color.second));
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layout->addWidget(new TextRenderer(24, text, color.first, color.second));
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layout->addWidget(new TextRenderer(36, text, color.first, color.second));
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layout->addWidget(new TextRenderer(48, text, color.first, color.second));
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static_cast<QHBoxLayout*>(m_previews->layout())->addLayout(layout);
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}
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mainLayout->addWidget(m_previews);
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auto *controls = new QHBoxLayout;
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auto *lineEdit = new QLineEdit(s_text);
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connect(lineEdit, &QLineEdit::textChanged, [&](const QString &text) {
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s_text = text;
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for (TextRenderer *renderer : m_previews->findChildren<TextRenderer *>())
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renderer->updateGeometry();
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});
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controls->addWidget(lineEdit);
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auto *colorButton = new QPushButton("Color...");
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connect(colorButton, &QPushButton::clicked, [&] {
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auto *colorDialog = new QColorDialog(this);
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colorDialog->setOptions(QColorDialog::NoButtons | QColorDialog::ShowAlphaChannel);
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colorDialog->setModal(false);
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connect(colorDialog, &QColorDialog::currentColorChanged, [&](const QColor &color) {
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QPalette p = palette();
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p.setColor(QPalette::Text, color);
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setPalette(p);
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});
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colorDialog->setCurrentColor(palette().text().color());
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colorDialog->setVisible(true);
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});
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controls->addWidget(colorButton);
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auto *fontButton = new QPushButton("Font...");
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connect(fontButton, &QPushButton::clicked, [&] {
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auto *fontDialog = new QFontDialog(this);
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fontDialog->setOptions(QFontDialog::NoButtons);
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fontDialog->setModal(false);
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fontDialog->setCurrentFont(m_previews->font());
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connect(fontDialog, &QFontDialog::currentFontChanged, [&](const QFont &font) {
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m_previews->setFont(font);
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});
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fontDialog->setVisible(true);
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});
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controls->addWidget(fontButton);
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auto *aaButton = new QCheckBox("NoAntialias");
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connect(aaButton, &QCheckBox::stateChanged, [&] {
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for (TextRenderer *renderer : m_previews->findChildren<TextRenderer *>()) {
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QFont font = renderer->font();
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font.setStyleStrategy(QFont::StyleStrategy(font.styleStrategy() ^ QFont::NoAntialias));
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renderer->setFont(font);
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}
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});
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controls->addWidget(aaButton);
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auto *subpixelAAButton = new QCheckBox("NoSubpixelAntialias");
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connect(subpixelAAButton, &QCheckBox::stateChanged, [&] {
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for (TextRenderer *renderer : m_previews->findChildren<TextRenderer *>()) {
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QFont font = renderer->font();
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font.setStyleStrategy(QFont::StyleStrategy(font.styleStrategy() ^ QFont::NoSubpixelAntialias));
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renderer->setFont(font);
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}
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});
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controls->addWidget(subpixelAAButton);
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controls->addStretch();
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mainLayout->addLayout(controls);
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mainLayout->setSizeConstraint(QLayout::SetFixedSize);
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setLayout(mainLayout);
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setMode(TextRenderer::QtRendering);
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setFocusPolicy(Qt::StrongFocus);
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setFocus();
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}
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void setMode(TextRenderer::RenderingMode mode)
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{
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s_mode = mode;
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setWindowTitle(s_mode == TextRenderer::QtRendering ? "Qt" : "Native");
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for (TextRenderer *renderer : m_previews->findChildren<TextRenderer *>())
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renderer->update();
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}
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void mousePressEvent(QMouseEvent *) override
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{
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setMode(TextRenderer::RenderingMode(!s_mode));
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}
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void keyPressEvent(QKeyEvent *e) override
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{
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if (e->key() == Qt::Key_Space)
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setMode(TextRenderer::RenderingMode(!s_mode));
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}
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QWidget *m_previews;
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};
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int main(int argc, char **argv)
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{
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qputenv("QT_MAX_CACHED_GLYPH_SIZE", "97");
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QApplication app(argc, argv);
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TestWidget widget;
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widget.show();
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return app.exec();
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}
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#include "main.moc"
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7
tests/manual/textrendering/nativetext/nativetext.pro
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7
tests/manual/textrendering/nativetext/nativetext.pro
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QT += widgets core-private gui-private
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SOURCES += main.cpp
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CONFIG -= app_bundle
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darwin {
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QMAKE_CXXFLAGS += -x objective-c++
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LIBS += -framework Foundation -framework CoreGraphics -framework AppKit
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}
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@ -1,4 +1,5 @@
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TEMPLATE=subdirs
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SUBDIRS = glyphshaping \
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textperformance
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textperformance \
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nativetext
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