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     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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    16 ** GNU Lesser General Public License Usage

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

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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     void resizeEvent(QResizeEvent *event);

    56 

    57 public slots:

    58     void updateRect();

    59 

    60 public:

    61     QList<QRegion> updates;

    62     QPaintBuffer buffer;

    63 

    64     int currentFrame;

    65     int currentIteration;

    66     QTime timer;

    67 

    68     QList<uint> visibleUpdates;

    69     QList<uint> iterationTimes;

    70     QString filename;

    71 };

    72 

    73 void ReplayWidget::updateRect()

    74 {

    75     if (!visibleUpdates.isEmpty())

    76         update(updates.at(visibleUpdates.at(currentFrame)));

    77 }

    78 

    79 void ReplayWidget::paintEvent(QPaintEvent *)

    80 {

    81     QPainter p(this);

    82 

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

    84 

    85     buffer.draw(&p, visibleUpdates.at(currentFrame));

    86 

    87     ++currentFrame;

    88     if (currentFrame >= visibleUpdates.size()) {

    89         currentFrame = 0;

    90         ++currentIteration;

    91 

    92         if (currentIteration == 3)

    93             timer.start();

    94         else if (currentIteration > 3) {

    95             iterationTimes << timer.elapsed();

    96             timer.restart();

    97 

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

    99                 qreal mean = 0;

   100                 qreal stddev = 0;

   101                 uint min = INT_MAX;

   102 

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

   104                     mean += iterationTimes.at(i);

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

   106                 }

   107 

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

   109 

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

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

   112                     stddev += delta * delta;

   113                 }

   114 

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

   116 

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

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

   119 

   120                 stddev = 100 * stddev / mean;

   121 

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

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

   124                             iterationTimes.size(), visibleUpdates.size(), min, median, stddev, 1000. * visibleUpdates.size() / min);

   125                     deleteLater();

   126                     return;

   127                 }

   128             }

   129         }

   130     }

   131 

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

   133 }

   134 

   135 void ReplayWidget::resizeEvent(QResizeEvent *event)

   136 {

   137     visibleUpdates.clear();

   138 

   139     QRect bounds = rect();

   140     for (int i = 0; i < updates.size(); ++i) {

   141         if (updates.at(i).intersects(bounds))

   142             visibleUpdates << i;

   143     }

   144 

   145     if (visibleUpdates.size() != updates.size())

   146         printf("Warning: skipped %d frames due to limited resolution\n", updates.size() - visibleUpdates.size());

   147 

   148 }

   149 

   150 ReplayWidget::ReplayWidget(const QString &filename_)

   151     : currentFrame(0)

   152     , currentIteration(0)

   153     , filename(filename_)

   154 {

   155     setWindowTitle(filename);

   156     QFile file(filename);

   157 

   158     if (!file.open(QIODevice::ReadOnly)) {

   159         printf("Failed to load input file '%s'\n", qPrintable(filename_));

   160         return;

   161     }

   162 

   163     QDataStream in(&file);

   164 

   165     char *data;

   166     uint size;

   167     in.readBytes(data, size);

   168     bool isTraceFile = size == 7 && qstrncmp(data, "qttrace", 7) == 0;

   169     delete [] data;

   170     if (!isTraceFile) {

   171         printf("File '%s' is not a trace file\n", qPrintable(filename_));

   172         return;

   173     }

   174 

   175     in >> buffer >> updates;

   176     printf("Read paint buffer with %d frames\n", buffer.numFrames());

   177 

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

   179 

   180     setAutoFillBackground(false);

   181     setAttribute(Qt::WA_NoSystemBackground);

   182 

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

   184 }

   185 

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

   187 {

   188     QApplication app(argc, argv);

   189 

   190     if (argc <= 1 || qstrcmp(argv[1], "-h") == 0 || qstrcmp(argv[1], "--help") == 0) {

   191         printf("Replays a tracefile generated with '-graphicssystem trace'\n");

   192         printf("Usage:\n  > %s [traceFile]\n", argv[0]);

   193         return 1;

   194     }

   195 

   196     QFile file(argv[1]);

   197     if (!file.exists()) {

   198         printf("%s does not exist\n", argv[1]);

   199         return 1;

   200     }

   201 

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

   203 

   204     if (!widget->updates.isEmpty()) {

   205         widget->show();

   206         return app.exec();

   207     }

   208 

   209 }

   210 #include "main.moc"