/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the tools applications of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include <QtGui>+
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#include <QtDebug>+
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+
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#include <private/qpaintengineex_p.h>+
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#include <private/qpaintbuffer_p.h>+
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+
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class ReplayWidget : public QWidget+
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{+
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    Q_OBJECT+
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public:+
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    ReplayWidget(const QString &filename, int from, int to, bool single, int frame);+
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+
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    void paintEvent(QPaintEvent *event);+
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    void resizeEvent(QResizeEvent *event);+
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+
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public slots:+
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    void updateRect();+
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+
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public:+
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    QList<QRegion> updates;+
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    QPaintBuffer buffer;+
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+
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    int currentFrame;+
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    int currentIteration;+
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    QTime timer;+
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+
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    QList<uint> visibleUpdates;+
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+
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    QVector<uint> iterationTimes;+
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    QString filename;+
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+
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    int from;+
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    int to;+
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+
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    bool single;+
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+
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    int frame;+
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    int currentCommand;+
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};+
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+
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void ReplayWidget::updateRect()+
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{+
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    if (frame >= 0 && !updates.isEmpty())+
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        update(updates.at(frame));+
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    else if (!visibleUpdates.isEmpty())+
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        update(updates.at(visibleUpdates.at(currentFrame)));+
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}+
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+
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const int singleFrameRepeatsPerCommand = 100;+
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const int singleFrameIterations = 4;+
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+
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void ReplayWidget::paintEvent(QPaintEvent *)+
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{+
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    QPainter p(this);+
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+
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    QTimer::singleShot(0, this, SLOT(updateRect()));+
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+
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//    p.setClipRegion(frames.at(currentFrame).updateRegion);+
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+
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    if (frame >= 0) {+
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        int start = buffer.frameStartIndex(frame);+
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        int end = buffer.frameEndIndex(frame);+
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+
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        iterationTimes.resize(end - start);+
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+
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        int saveRestoreStackDepth = buffer.processCommands(&p, start, start + currentCommand);+
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+
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        for (int i = 0; i < saveRestoreStackDepth; ++i)+
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            p.restore();+
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+
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        const int repeats = currentIteration >= 3 ? singleFrameRepeatsPerCommand : 1;+
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+
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        ++currentFrame;+
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        if (currentFrame == repeats) {+
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            currentFrame = 0;+
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            if (currentIteration >= 3) {+
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                iterationTimes[currentCommand - 1] = qMin(iterationTimes[currentCommand - 1], uint(timer.elapsed()));+
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                timer.restart();+
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            }+
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+
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            if (currentIteration >= singleFrameIterations + 3) {+
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                printf(" #    | ms      | description\n");+
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                printf("------+---------+------------------------------------------------------------\n");+
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+
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		qSort(iterationTimes);+
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+
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		int sum = 0;+
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                for (int i = 0; i < iterationTimes.size(); ++i) {+
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                    int delta = iterationTimes.at(i);+
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                    if (i > 0)+
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                        delta -= iterationTimes.at(i-1);+
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		    sum += delta;+
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                    qreal deltaF = delta / qreal(repeats);+
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                    printf("%.5d | %.5f | %s\n", i, deltaF, qPrintable(buffer.commandDescription(start + i)));+
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                }+
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                printf("Total | %.5f | Total frame time\n", sum / qreal(repeats));+
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                deleteLater();+
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                return;+
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            }+
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+
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            if (start + currentCommand >= end) {+
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                currentCommand = 1;+
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		++currentIteration;+
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                if (currentIteration == 3) {+
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                    timer.start();+
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                    iterationTimes.fill(uint(-1));+
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                }+
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		if (currentIteration >= 3 && currentIteration < singleFrameIterations + 3)+
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                    printf("Profiling iteration %d of %d\n", currentIteration - 2, singleFrameIterations);+
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            } else {+
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                ++currentCommand;+
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	    }+
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        }+
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+
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        return;+
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    }+
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+
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    buffer.draw(&p, visibleUpdates.at(currentFrame));+
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+
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    ++currentFrame;+
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    if (currentFrame >= visibleUpdates.size()) {+
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        currentFrame = 0;+
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        ++currentIteration;+
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+
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        if (single) {+
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            deleteLater();+
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            return;+
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        }+
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+
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        if (currentIteration == 3)+
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            timer.start();+
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        else if (currentIteration > 3) {+
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            iterationTimes << timer.elapsed();+
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            timer.restart();+
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+
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            if (iterationTimes.size() >= 3) {+
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                qreal mean = 0;+
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                qreal stddev = 0;+
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                uint min = INT_MAX;+
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+
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                for (int i = 0; i < iterationTimes.size(); ++i) {+
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                    mean += iterationTimes.at(i);+
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                    min = qMin(min, iterationTimes.at(i));+
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                }+
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+
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                mean /= qreal(iterationTimes.size());+
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+
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                for (int i = 0; i < iterationTimes.size(); ++i) {+
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                    qreal delta = iterationTimes.at(i) - mean;+
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                    stddev += delta * delta;+
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                }+
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+
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                stddev = qSqrt(stddev / iterationTimes.size());+
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+
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                qSort(iterationTimes.begin(), iterationTimes.end());+
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                uint median = iterationTimes.at(iterationTimes.size() / 2);+
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+
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                stddev = 100 * stddev / mean;+
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+
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                if (iterationTimes.size() >= 10 || stddev < 4) {+
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                    printf("%s, iterations: %d, frames: %d, min(ms): %d, median(ms): %d, stddev: %f %%, max(fps): %f\n", qPrintable(filename),+
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                            iterationTimes.size(), visibleUpdates.size(), min, median, stddev, 1000. * visibleUpdates.size() / min);+
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                    deleteLater();+
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                    return;+
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                }+
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            }+
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        }+
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    }+
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}+
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+
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void ReplayWidget::resizeEvent(QResizeEvent *)+
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{+
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    visibleUpdates.clear();+
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+
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    QRect bounds = rect();+
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+
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    int first = qMax(0, from);+
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    int last = qMin(unsigned(to), unsigned(updates.size()));+
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    for (int i = first; i < last; ++i) {+
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        if (updates.at(i).intersects(bounds))+
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            visibleUpdates << i;+
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    }+
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+
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    int range = last - first;+
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+
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    if (visibleUpdates.size() != range)+
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        printf("Warning: skipped %d frames due to limited resolution\n", range - visibleUpdates.size());+
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+
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}+
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+
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ReplayWidget::ReplayWidget(const QString &filename_, int from_, int to_, bool single_, int frame_)+
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    : currentFrame(0)+
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    , currentIteration(0)+
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    , filename(filename_)+
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    , from(from_)+
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    , to(to_)+
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    , single(single_)+
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    , frame(frame_)+
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    , currentCommand(1)+
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{+
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    setWindowTitle(filename);+
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    QFile file(filename);+
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+
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    if (!file.open(QIODevice::ReadOnly)) {+
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        printf("Failed to load input file '%s'\n", qPrintable(filename_));+
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        return;+
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    }+
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+
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    QDataStream in(&file);+
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+
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    char *data;+
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    uint size;+
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    in.readBytes(data, size);+
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    bool isTraceFile = size >= 7 && qstrncmp(data, "qttrace", 7) == 0;+
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+
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    uint version = 0;+
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    if (size == 9 && qstrncmp(data, "qttraceV2", 9) == 0) {+
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        in.setFloatingPointPrecision(QDataStream::SinglePrecision);+
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        in >> version;+
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    }+
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+
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    if (!isTraceFile) {+
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        printf("File '%s' is not a trace file\n", qPrintable(filename_));+
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        return;+
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    }+
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+
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    in >> buffer >> updates;+
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    printf("Read paint buffer version %d with %d frames\n", version, buffer.numFrames());+
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+
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    resize(buffer.boundingRect().size().toSize());+
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+
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    setAutoFillBackground(false);+
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    setAttribute(Qt::WA_NoSystemBackground);+
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+
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    QTimer::singleShot(10, this, SLOT(updateRect()));+
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}+
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+
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int main(int argc, char **argv)+
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{+
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    QApplication app(argc, argv);+
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+
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    if (argc <= 1 || qstrcmp(argv[1], "-h") == 0 || qstrcmp(argv[1], "--help") == 0) {+
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        printf("Replays a tracefile generated with '-graphicssystem trace'\n");+
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        printf("Usage:\n  > %s [OPTIONS] [traceFile]\n", argv[0]);+
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        printf("OPTIONS\n"+
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               "   --range=from-to to specify a frame range.\n"+
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               "   --singlerun to do only one run (without statistics)\n"+
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               "   --instrumentframe=frame to instrument a single frame\n");+
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        return 1;+
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    }+
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+
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    QFile file(app.arguments().last());+
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    if (!file.exists()) {+
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        printf("%s does not exist\n", qPrintable(app.arguments().last()));+
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        return 1;+
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    }+
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+
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    bool single = false;+
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+
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    int frame = -1;+
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+
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    int from = 0;+
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    int to = -1;+
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    for (int i = 1; i < app.arguments().size() - 1; ++i) {+
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        QString arg = app.arguments().at(i);+
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        if (arg.startsWith(QLatin1String("--range="))) {+
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            QString rest = arg.mid(8);+
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            QStringList components = rest.split(QLatin1Char('-'));+
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+
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            bool ok1 = false;+
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            bool ok2 = false;+
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            int fromCandidate = 0;+
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            int toCandidate = 0;+
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            if (components.size() == 2) {+
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                fromCandidate = components.first().toInt(&ok1);+
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                toCandidate = components.last().toInt(&ok2);+
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            }+
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+
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            if (ok1 && ok2) {+
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                from = fromCandidate;+
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                to = toCandidate;+
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            } else {+
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                printf("ERROR: malformed syntax in argument %s\n", qPrintable(arg));+
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            }+
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        } else if (arg == QLatin1String("--singlerun")) {+
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            single = true;+
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        } else if (arg.startsWith(QLatin1String("--instrumentframe="))) {+
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            QString rest = arg.mid(18);+
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            bool ok = false;+
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            int frameCandidate = rest.toInt(&ok);+
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            if (ok) {+
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                frame = frameCandidate;+
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            } else {+
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                printf("ERROR: malformed syntax in argument %s\n", qPrintable(arg));+
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            }+
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        } else {+
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            printf("Unrecognized argument: %s\n", qPrintable(arg));+
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            return 1;+
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        }+
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    }+
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+
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    ReplayWidget *widget = new ReplayWidget(app.arguments().last(), from, to, single, frame);+
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+
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    if (!widget->updates.isEmpty()) {+
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        widget->show();+
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        return app.exec();+
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    }+
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+
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}+
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#include "main.moc"+
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