/****************************************************************************

**

** 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 plugins 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 "qgraphicssystem_trace_p.h"

#include <private/qpixmap_raster_p.h>

#include <private/qpaintbuffer_p.h>

#include <private/qwindowsurface_raster_p.h>

#include <QFile>

#include <QPainter>

#include <QtDebug>

QT_BEGIN_NAMESPACE

class QTraceWindowSurface : public QRasterWindowSurface

{

public:

    QTraceWindowSurface(QWidget *widget);

    ~QTraceWindowSurface();

    QPaintDevice *paintDevice();

    void beginPaint(const QRegion &rgn);

    void endPaint(const QRegion &rgn);

    bool scroll(const QRegion &area, int dx, int dy);

private:

    QPaintBuffer *buffer;

    QList<QRegion> updates;

    qulonglong winId;

};

QTraceWindowSurface::QTraceWindowSurface(QWidget *widget)

    : QRasterWindowSurface(widget)

    , buffer(0)

    , winId(0)

{

}

QTraceWindowSurface::~QTraceWindowSurface()

{

    if (buffer) {

        QFile outputFile(QString(QLatin1String("qtgraphics-%0.trace")).arg(winId));

        if (outputFile.open(QIODevice::WriteOnly)) {

            QDataStream out(&outputFile);

            out.writeBytes("qttrace", 7);

            out << *buffer << updates;

        }

        delete buffer;

    }

}

QPaintDevice *QTraceWindowSurface::paintDevice()

{

    if (!buffer) {

        buffer = new QPaintBuffer;

        buffer->setBoundingRect(geometry());

    }

    return buffer;

}

void QTraceWindowSurface::beginPaint(const QRegion &rgn)

{

    // ensure paint buffer is created

    paintDevice();

    buffer->beginNewFrame();

    QRasterWindowSurface::beginPaint(rgn);

}

void QTraceWindowSurface::endPaint(const QRegion &rgn)

{

    QPainter p(QRasterWindowSurface::paintDevice());

    buffer->draw(&p, buffer->numFrames()-1);

    p.end();

    winId = (qulonglong)window()->winId();

    updates << rgn;

    QRasterWindowSurface::endPaint(rgn);

}

bool QTraceWindowSurface::scroll(const QRegion &, int, int)

{

    // TODO: scrolling should also be streamed and replayed

    // to test scrolling performance

    return false;

}

QTraceGraphicsSystem::QTraceGraphicsSystem()

{

}

QPixmapData *QTraceGraphicsSystem::createPixmapData(QPixmapData::PixelType type) const

{

    return new QRasterPixmapData(type);

}

QWindowSurface *QTraceGraphicsSystem::createWindowSurface(QWidget *widget) const

{

    return new QTraceWindowSurface(widget);

}

QT_END_NAMESPACE