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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

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     7 ** This file is part of the tools applications of the Qt Toolkit.

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     9 ** $QT_BEGIN_LICENSE:LGPL$

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    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 #include <QtDebug>

    44 

    45 #include <private/qpaintengineex_p.h>

    46 #include <private/qpaintbuffer_p.h>

    47 

    48 class ReplayWidget : public QWidget

    49 {

    50     Q_OBJECT

    51 public:

    52     ReplayWidget(const QString &filename);

    53 

    54     void paintEvent(QPaintEvent *event);

    55 

    56 public slots:

    57     void updateRect();

    58 

    59 private:

    60     QList<QRegion> updates;

    61     QPaintBuffer buffer;

    62 

    63     int currentFrame;

    64     int currentIteration;

    65     QTime timer;

    66 

    67     QList<uint> iterationTimes;

    68     QString filename;

    69 };

    70 

    71 void ReplayWidget::updateRect()

    72 {

    73     update(updates.at(currentFrame));

    74 }

    75 

    76 void ReplayWidget::paintEvent(QPaintEvent *)

    77 {

    78     QPainter p(this);

    79 

    80 //    p.setClipRegion(frames.at(currentFrame).updateRegion);

    81 

    82     buffer.draw(&p, currentFrame);

    83 

    84     ++currentFrame;

    85     if (currentFrame >= buffer.numFrames()) {

    86         currentFrame = 0;

    87         ++currentIteration;

    88 

    89         if (currentIteration == 3)

    90             timer.start();

    91         else if (currentIteration > 3) {

    92             iterationTimes << timer.elapsed();

    93             timer.restart();

    94 

    95             if (iterationTimes.size() >= 3) {

    96                 qreal mean = 0;

    97                 qreal stddev = 0;

    98                 uint min = INT_MAX;

    99 

   100                 for (int i = 0; i < iterationTimes.size(); ++i) {

   101                     mean += iterationTimes.at(i);

   102                     min = qMin(min, iterationTimes.at(i));

   103                 }

   104 

   105                 mean /= qreal(iterationTimes.size());

   106 

   107                 for (int i = 0; i < iterationTimes.size(); ++i) {

   108                     qreal delta = iterationTimes.at(i) - mean;

   109                     stddev += delta * delta;

   110                 }

   111 

   112                 stddev = qSqrt(stddev / iterationTimes.size());

   113 

   114                 qSort(iterationTimes.begin(), iterationTimes.end());

   115                 uint median = iterationTimes.at(iterationTimes.size() / 2);

   116 

   117                 stddev = 100 * stddev / mean;

   118 

   119                 if (iterationTimes.size() >= 10 || stddev < 4) {

   120                     printf("%s, iterations: %d, frames: %d, min(ms): %d, median(ms): %d, stddev: %f %%, max(fps): %f\n", qPrintable(filename),

   121                             iterationTimes.size(), updates.size(), min, median, stddev, 1000. * updates.size() / min);

   122                     deleteLater();

   123                     return;

   124                 }

   125             }

   126         }

   127     }

   128 

   129     QTimer::singleShot(0, this, SLOT(updateRect()));

   130 }

   131 

   132 ReplayWidget::ReplayWidget(const QString &filename_)

   133     : currentFrame(0)

   134     , currentIteration(0)

   135     , filename(filename_)

   136 {

   137     setWindowTitle(filename);

   138     QFile file(filename);

   139 

   140     QRect bounds;

   141     if (file.open(QIODevice::ReadOnly)) {

   142         QDataStream in(&file);

   143         in >> buffer >> updates;

   144     }

   145 

   146     qDebug() << "Read paint buffer with" << buffer.numFrames() << "frames";

   147 

   148     resize(buffer.boundingRect().size().toSize());

   149 

   150     setAutoFillBackground(false);

   151     setAttribute(Qt::WA_NoSystemBackground);

   152 

   153     QTimer::singleShot(10, this, SLOT(updateRect()));

   154 }

   155 

   156 int main(int argc, char **argv)

   157 {

   158     QApplication app(argc, argv);

   159 

   160     if (argc <= 1) {

   161         printf("Usage: %s filename\n", argv[0]);

   162         return 1;

   163     }

   164 

   165     ReplayWidget *widget = new ReplayWidget(argv[1]);

   166     widget->show();

   167 

   168     return app.exec();

   169 }

   170 #include "main.moc"