be15856f61
Change copyrights and license headers from Nokia to Digia Change-Id: If1cc974286d29fd01ec6c19dd4719a67f4c3f00e Reviewed-by: Lars Knoll <lars.knoll@digia.com> Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
228 lines
7.7 KiB
C++
228 lines
7.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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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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** $QT_BEGIN_LICENSE:LGPL$
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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 Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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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 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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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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static const int lastMeasurementsCount = 50;
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class FontBlaster: public QWidget
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{
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Q_OBJECT
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public:
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FontBlaster(QWidget *parent = 0)
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: QWidget(parent)
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, m_currentMode(0)
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{
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setFocusPolicy(Qt::StrongFocus);
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}
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void paintEvent(QPaintEvent *event)
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{
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Q_UNUSED(event);
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QPainter p(this);
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if (!m_timer.isNull())
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m_lastMeasurements.append(m_timer.elapsed());
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m_timer.start();
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p.save();
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m_modes[m_currentMode].function(p, size());
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p.restore();
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const QFontMetrics fm = p.fontMetrics();
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p.setOpacity(0.7);
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p.fillRect(0, 0, width(), fm.height(), Qt::gray);
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p.fillRect(0, height() - fm.height(), width(), height(), Qt::gray);
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p.setOpacity(1);
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p.setPen(palette().color(QPalette::Text));
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p.drawText(2, fm.ascent(), m_modes[m_currentMode].name);
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if (m_lastMeasurements.count() == lastMeasurementsCount) {
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m_lastMeasurements.removeFirst();
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int lastMsecsSum = 0;
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foreach(const int measurement, m_lastMeasurements)
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lastMsecsSum += measurement;
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p.drawText(2, height() - fm.descent(),
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QLatin1String("Fps: ") +
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QString::number(1000 / ((qreal)lastMsecsSum / lastMeasurementsCount), 'f', 1)
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);
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}
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QTimer::singleShot(0, this, SLOT(repaint()));
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}
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/*
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Creating all kinds of size/weight/italic combinations, stress testing
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the glyph cache.
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Also: painting with different opacities, stress testing blitting.
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*/
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static void paintDifferentFontStyles(QPainter &p, const QSize &size)
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{
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static const QString text = QLatin1String("Qt rocks!!!");
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static const int textsPerPaint = 30;
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for (int i = 0; i < textsPerPaint; i++) {
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const int fontSize = 4 + (qrand() % 5);
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const int fontWeight = (qrand() % 2) == 1 ? QFont::Normal : QFont::Bold;
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const bool fontItalic = (qrand() % 2) == 1;
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const QFont font("Default", fontSize, fontWeight, fontItalic);
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p.setFont(font);
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p.setPen(QColor::fromHsv(qrand() % 359, 155 + qrand() % 100,
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155 + qrand() % 100, 100 + qrand() % 155));
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const QSize textSize(p.fontMetrics().boundingRect(text).size());
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const QPoint position(
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-textSize.width() / 2 + (qrand() % size.width()),
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textSize.height() / 2 + (qrand() % size.height()));
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p.drawText(position, text);
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}
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}
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/*
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Drawing a multiline latin text, stress testing the text layout system.
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*/
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static void paintLongLatinText(QPainter &p, const QSize &size)
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{
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static const char* const pieces[] = {
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"lorem ipsum",
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"dolor sit amet",
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"consectetuer",
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"sed diam nonumy",
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"eos et accusam",
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"sea takimata sanctus"
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};
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static const int piecesCount = (int)(sizeof pieces / sizeof pieces[0]);
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static const int piecesPerPaint = 30;
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QString text;
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for (int i = 0; i < piecesPerPaint; ++i) {
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QString piece = QLatin1String(pieces[qrand() % piecesCount]);
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if (i == 0 || qrand() % 2) {
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// Make this piece the beginning of a new sentence.
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piece[0] = piece[0].toUpper();
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if (i > 0)
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piece.prepend(QLatin1String(". "));
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} else {
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piece.prepend(QLatin1String(", "));
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}
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text.append(piece);
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}
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text.append(QLatin1Char('.'));
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p.drawText(QRectF(QPointF(0, 0), QSizeF(size)),
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Qt::AlignTop | Qt::AlignAbsolute | Qt::TextWordWrap, text);
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}
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/*
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Drawing one text with several snippets of different writingSystems, stress
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testing the font merging in the font database.
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*/
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static void paintInternationalText(QPainter &p, const QSize &size)
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{
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static QStringList samples;
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if (samples.isEmpty()) {
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foreach (const QFontDatabase::WritingSystem system, QFontDatabase().writingSystems())
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if (system != QFontDatabase::Ogham && system != QFontDatabase::Runic)
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samples.append(QFontDatabase::writingSystemSample(system));
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}
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static const int systemsPerPaint = 65;
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QString text;
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for (int i = 0; i < systemsPerPaint; i++) {
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if (i > 0)
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text.append(QLatin1Char(' '));
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text.append(samples.at(qrand() % samples.count()));
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}
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p.drawText(QRectF(QPointF(0, 0), QSizeF(size)),
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Qt::AlignTop | Qt::AlignAbsolute | Qt::TextWordWrap, text);
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}
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protected:
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void nextMode()
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{
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m_currentMode = (m_currentMode + 1) % m_modesCount;
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m_lastMeasurements.clear();
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}
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void keyPressEvent(QKeyEvent *event)
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{
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Q_UNUSED(event);
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nextMode();
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}
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void mousePressEvent(QMouseEvent *event)
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{
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Q_UNUSED(event);
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nextMode();
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}
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private:
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static const struct mode {
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QString name;
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void (*function)(QPainter &, const QSize&);
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} m_modes[];
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static const int m_modesCount;
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int m_currentMode;
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QList<int> m_lastMeasurements;
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QTime m_timer;
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};
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const struct FontBlaster::mode FontBlaster::m_modes[] = {
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{ QLatin1String("Qt rocks!!!"), FontBlaster::paintDifferentFontStyles },
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{ QLatin1String("Latin"), FontBlaster::paintLongLatinText },
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{ QLatin1String("International"), FontBlaster::paintInternationalText }
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};
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const int FontBlaster::m_modesCount =
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(int)(sizeof m_modes / sizeof m_modes[0]);
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int main(int argc, char *argv[])
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{
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QApplication a(argc, argv);
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FontBlaster dlg;
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dlg.show();
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return a.exec();
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}
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#include "main.moc"
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