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/****************************************************************************
**
** 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 tools applications 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>
#include <QtDebug>
#include <private/qpaintengineex_p.h>
#include <private/qpaintbuffer_p.h>
class ReplayWidget : public QWidget
{
Q_OBJECT
public:
ReplayWidget(const QString &filename);
void paintEvent(QPaintEvent *event);
public slots:
void updateRect();
public:
QList<QRegion> updates;
QPaintBuffer buffer;
int currentFrame;
int currentIteration;
QTime timer;
QList<uint> iterationTimes;
QString filename;
};
void ReplayWidget::updateRect()
{
if (!updates.isEmpty())
update(updates.at(currentFrame));
}
void ReplayWidget::paintEvent(QPaintEvent *)
{
QPainter p(this);
// p.setClipRegion(frames.at(currentFrame).updateRegion);
buffer.draw(&p, currentFrame);
++currentFrame;
if (currentFrame >= buffer.numFrames()) {
currentFrame = 0;
++currentIteration;
if (currentIteration == 3)
timer.start();
else if (currentIteration > 3) {
iterationTimes << timer.elapsed();
timer.restart();
if (iterationTimes.size() >= 3) {
qreal mean = 0;
qreal stddev = 0;
uint min = INT_MAX;
for (int i = 0; i < iterationTimes.size(); ++i) {
mean += iterationTimes.at(i);
min = qMin(min, iterationTimes.at(i));
}
mean /= qreal(iterationTimes.size());
for (int i = 0; i < iterationTimes.size(); ++i) {
qreal delta = iterationTimes.at(i) - mean;
stddev += delta * delta;
}
stddev = qSqrt(stddev / iterationTimes.size());
qSort(iterationTimes.begin(), iterationTimes.end());
uint median = iterationTimes.at(iterationTimes.size() / 2);
stddev = 100 * stddev / mean;
if (iterationTimes.size() >= 10 || stddev < 4) {
printf("%s, iterations: %d, frames: %d, min(ms): %d, median(ms): %d, stddev: %f %%, max(fps): %f\n", qPrintable(filename),
iterationTimes.size(), updates.size(), min, median, stddev, 1000. * updates.size() / min);
deleteLater();
return;
}
}
}
}
QTimer::singleShot(0, this, SLOT(updateRect()));
}
ReplayWidget::ReplayWidget(const QString &filename_)
: currentFrame(0)
, currentIteration(0)
, filename(filename_)
{
setWindowTitle(filename);
QFile file(filename);
QRect bounds;
if (!file.open(QIODevice::ReadOnly)) {
printf("Failed to load input file '%s'\n", qPrintable(filename_));
return;
}
QDataStream in(&file);
char *data;
uint size;
in.readBytes(data, size);
bool isTraceFile = size == 7 && qstrncmp(data, "qttrace", 7) == 0;
delete [] data;
if (!isTraceFile) {
printf("File '%s' is not a trace file\n", qPrintable(filename_));
return;
}
in >> buffer >> updates;
printf("Read paint buffer with %d frames\n", buffer.numFrames());
resize(buffer.boundingRect().size().toSize());
setAutoFillBackground(false);
setAttribute(Qt::WA_NoSystemBackground);
QTimer::singleShot(10, this, SLOT(updateRect()));
}
int main(int argc, char **argv)
{
QApplication app(argc, argv);
if (argc <= 1 || qstrcmp(argv[1], "-h") == 0 || qstrcmp(argv[1], "--help") == 0) {
printf("Replays a tracefile generated with '-graphicssystem trace'\n");
printf("Usage:\n > %s [traceFile]\n", argv[0]);
return 1;
}
QFile file(argv[1]);
if (!file.exists()) {
printf("%s does not exist\n", argv[1]);
return 1;
}
ReplayWidget *widget = new ReplayWidget(argv[1]);
if (!widget->updates.isEmpty()) {
widget->show();
return app.exec();
}
}
#include "main.moc"
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