--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/manual/textrendering/textperformance/main.cpp Tue Feb 02 00:43:10 2010 +0200
@@ -0,0 +1,231 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+static const int lastMeasurementsCount = 50;
+
+class FontBlaster: public QWidget
+{
+ Q_OBJECT
+
+public:
+ FontBlaster(QWidget *parent = 0)
+ : QWidget(parent)
+ , m_currentMode(0)
+ {
+ setFocusPolicy(Qt::StrongFocus);
+ }
+
+ void paintEvent(QPaintEvent *event)
+ {
+ Q_UNUSED(event);
+ QPainter p(this);
+
+ if (!m_timer.isNull())
+ m_lastMeasurements.append(m_timer.elapsed());
+ m_timer.start();
+
+ p.save();
+ m_modes[m_currentMode].function(p, size());
+ p.restore();
+
+ const QFontMetrics fm = p.fontMetrics();
+ p.setOpacity(0.7);
+ p.fillRect(0, 0, width(), fm.height(), Qt::gray);
+ p.fillRect(0, height() - fm.height(), width(), height(), Qt::gray);
+ p.setOpacity(1);
+ p.setPen(palette().color(QPalette::Text));
+ p.drawText(2, fm.ascent(), m_modes[m_currentMode].name);
+
+ if (m_lastMeasurements.count() == lastMeasurementsCount) {
+ m_lastMeasurements.removeFirst();
+ int lastMsecsSum = 0;
+ foreach(const int measurement, m_lastMeasurements)
+ lastMsecsSum += measurement;
+
+ p.drawText(2, height() - fm.descent(),
+ QLatin1String("Fps: ") +
+ QString::number(1000 / ((qreal)lastMsecsSum / lastMeasurementsCount), 'f', 1)
+ );
+ }
+
+ QTimer::singleShot(0, this, SLOT(repaint()));
+ }
+
+ /*
+ Creating all kinds of size/weight/italic combinations, stress testing
+ the glyph cache.
+ Also: painting with different opacities, stress testing blitting.
+ */
+ static void paintDifferentFontStyles(QPainter &p, const QSize &size)
+ {
+ static const QString text = QLatin1String("Qt rocks!!!");
+ static const int textsPerPaint = 30;
+ for (int i = 0; i < textsPerPaint; i++) {
+ const int fontSize = 4 + (qrand() % 5);
+ const int fontWeight = (qrand() % 2) == 1 ? QFont::Normal : QFont::Bold;
+ const bool fontItalic = (qrand() % 2) == 1;
+ const QFont font("Default", fontSize, fontWeight, fontItalic);
+ p.setFont(font);
+ p.setPen(QColor::fromHsv(qrand() % 359, 155 + qrand() % 100,
+ 155 + qrand() % 100, 100 + qrand() % 155));
+ const QSize textSize(p.fontMetrics().boundingRect(text).size());
+ const QPoint position(
+ -textSize.width() / 2 + (qrand() % size.width()),
+ textSize.height() / 2 + (qrand() % size.height()));
+ p.drawText(position, text);
+ }
+ }
+
+ /*
+ Drawing a multiline latin text, stress testing the text layout system.
+ */
+ static void paintLongLatinText(QPainter &p, const QSize &size)
+ {
+ static const char* const pieces[] = {
+ "lorem ipsum",
+ "dolor sit amet",
+ "consectetuer",
+ "sed diam nonumy",
+ "eos et accusam",
+ "sea takimata sanctus"
+ };
+ static const int piecesCount = (int)(sizeof pieces / sizeof pieces[0]);
+ static const int piecesPerPaint = 30;
+
+ QString text;
+ for (int i = 0; i < piecesPerPaint; ++i) {
+ QString piece = QLatin1String(pieces[qrand() % piecesCount]);
+ if (i == 0 || qrand() % 2) {
+ // Make this piece the beginning of a new sentence.
+ piece[0] = piece[0].toUpper();
+ if (i > 0)
+ piece.prepend(QLatin1String(". "));
+ } else {
+ piece.prepend(QLatin1String(", "));
+ }
+ text.append(piece);
+ }
+ text.append(QLatin1Char('.'));
+
+ p.drawText(QRectF(QPointF(0, 0), QSizeF(size)),
+ Qt::AlignTop | Qt::AlignAbsolute | Qt::TextWordWrap, text);
+ }
+
+ /*
+ Drawing one text with several snippets of different writingSystems, stress
+ testing the font merging in the font database.
+ */
+ static void paintInternationalText(QPainter &p, const QSize &size)
+ {
+ static QStringList samples;
+ if (samples.isEmpty()) {
+ foreach (const QFontDatabase::WritingSystem system, QFontDatabase().writingSystems())
+ if (system != QFontDatabase::Ogham && system != QFontDatabase::Runic)
+ samples.append(QFontDatabase::writingSystemSample(system));
+ }
+ static const int systemsPerPaint = 65;
+ QString text;
+ for (int i = 0; i < systemsPerPaint; i++) {
+ if (i > 0)
+ text.append(QLatin1Char(' '));
+ text.append(samples.at(qrand() % samples.count()));
+ }
+ p.drawText(QRectF(QPointF(0, 0), QSizeF(size)),
+ Qt::AlignTop | Qt::AlignAbsolute | Qt::TextWordWrap, text);
+ }
+
+protected:
+ void nextMode()
+ {
+ m_currentMode = (m_currentMode + 1) % m_modesCount;
+ m_lastMeasurements.clear();
+ }
+
+ void keyPressEvent(QKeyEvent *event)
+ {
+ Q_UNUSED(event);
+ nextMode();
+ }
+
+ void mousePressEvent(QMouseEvent *event)
+ {
+ Q_UNUSED(event);
+ nextMode();
+ }
+
+private:
+ static const struct mode {
+ QString name;
+ void (*function)(QPainter &, const QSize&);
+ } m_modes[];
+ static const int m_modesCount;
+
+ int m_currentMode;
+ QList<int> m_lastMeasurements;
+ QTime m_timer;
+};
+
+const struct FontBlaster::mode FontBlaster::m_modes[] = {
+ { QLatin1String("Qt rocks!!!"), FontBlaster::paintDifferentFontStyles },
+ { QLatin1String("Latin"), FontBlaster::paintLongLatinText },
+ { QLatin1String("International"), FontBlaster::paintInternationalText }
+};
+
+const int FontBlaster::m_modesCount =
+ (int)(sizeof m_modes / sizeof m_modes[0]);
+
+int main(int argc, char *argv[])
+{
+ QApplication a(argc, argv);
+
+ FontBlaster dlg;
+#ifdef Q_OS_SYMBIAN
+ dlg.showFullScreen();
+#else
+ dlg.show();
+#endif
+
+ return a.exec();
+}
+
+#include "main.moc"