/****************************************************************************+
−
**+
−
** Copyright (C) 2010 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"+
−