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

**

** 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 "qdirectfbscreen.h"

#include "qdirectfbpaintdevice.h"

#include "qdirectfbpaintengine.h"

#ifndef QT_NO_QWS_DIRECTFB

QT_BEGIN_NAMESPACE

QDirectFBPaintDevice::QDirectFBPaintDevice(QDirectFBScreen *scr)

    : QCustomRasterPaintDevice(0), dfbSurface(0), screen(scr),

      bpl(-1), lockFlgs(DFBSurfaceLockFlags(0)), mem(0), engine(0), imageFormat(QImage::Format_Invalid)

{

#ifdef QT_DIRECTFB_SUBSURFACE

    subSurface = 0;

    syncPending = false;

#endif

}

QDirectFBPaintDevice::~QDirectFBPaintDevice()

{

    if (QDirectFBScreen::instance()) {

        unlockSurface();

#ifdef QT_DIRECTFB_SUBSURFACE

        releaseSubSurface();

#endif

        if (dfbSurface) {

            screen->releaseDFBSurface(dfbSurface);

        }

    }

    delete engine;

}

IDirectFBSurface *QDirectFBPaintDevice::directFBSurface() const

{

    return dfbSurface;

}

bool QDirectFBPaintDevice::lockSurface(DFBSurfaceLockFlags lockFlags)

{

    if (lockFlgs && (lockFlags & ~lockFlgs))

        unlockSurface();

    if (!mem) {

        Q_ASSERT(dfbSurface);

#ifdef QT_DIRECTFB_SUBSURFACE

        if (!subSurface) {

            DFBResult result;

            subSurface = screen->getSubSurface(dfbSurface, QRect(), QDirectFBScreen::TrackSurface, &result);

            if (result != DFB_OK || !subSurface) {

                DirectFBError("Couldn't create sub surface", result);

                return false;

            }

        }

        IDirectFBSurface *surface = subSurface;

#else

        IDirectFBSurface *surface = dfbSurface;

#endif

        Q_ASSERT(surface);

        mem = QDirectFBScreen::lockSurface(surface, lockFlags, &bpl);

        lockFlgs = lockFlags;

        Q_ASSERT(mem);

        Q_ASSERT(bpl > 0);

        const QSize s = size();

        lockedImage = QImage(mem, s.width(), s.height(), bpl,

                             QDirectFBScreen::getImageFormat(dfbSurface));

        return true;

    }

#ifdef QT_DIRECTFB_SUBSURFACE

    if (syncPending) {

        syncPending = false;

        screen->waitIdle();

    }

#endif

    return false;

}

void QDirectFBPaintDevice::unlockSurface()

{

    if (QDirectFBScreen::instance() && lockFlgs) {

#ifdef QT_DIRECTFB_SUBSURFACE

        IDirectFBSurface *surface = subSurface;

#else

        IDirectFBSurface *surface = dfbSurface;

#endif

        if (surface) {

            surface->Unlock(surface);

            lockFlgs = static_cast<DFBSurfaceLockFlags>(0);

            mem = 0;

        }

    }

}

void *QDirectFBPaintDevice::memory() const

{

    return mem;

}

QImage::Format QDirectFBPaintDevice::format() const

{

    return imageFormat;

}

int QDirectFBPaintDevice::bytesPerLine() const

{

    Q_ASSERT(!mem || bpl != -1);

    return bpl;

}

QSize QDirectFBPaintDevice::size() const

{

    int w, h;

    dfbSurface->GetSize(dfbSurface, &w, &h);

    return QSize(w, h);

}

int QDirectFBPaintDevice::metric(QPaintDevice::PaintDeviceMetric metric) const

{

    if (!dfbSurface)

        return 0;

    switch (metric) {

    case QPaintDevice::PdmWidth:

    case QPaintDevice::PdmHeight:

        return (metric == PdmWidth ? size().width() : size().height());

    case QPaintDevice::PdmWidthMM:

        return (size().width() * 1000) / dotsPerMeterX();

    case QPaintDevice::PdmHeightMM:

        return (size().height() * 1000) / dotsPerMeterY();

    case QPaintDevice::PdmPhysicalDpiX:

    case QPaintDevice::PdmDpiX:

        return (dotsPerMeterX() * 254) / 10000; // 0.0254 meters-per-inch

    case QPaintDevice::PdmPhysicalDpiY:

    case QPaintDevice::PdmDpiY:

        return (dotsPerMeterY() * 254) / 10000; // 0.0254 meters-per-inch

    case QPaintDevice::PdmDepth:

        return QDirectFBScreen::depth(imageFormat);

    case QPaintDevice::PdmNumColors: {

        if (!lockedImage.isNull())

            return lockedImage.colorCount();

        DFBResult result;

        IDirectFBPalette *palette = 0;

        unsigned int numColors = 0;

        result = dfbSurface->GetPalette(dfbSurface, &palette);

        if ((result != DFB_OK) || !palette)

            return 0;

        result = palette->GetSize(palette, &numColors);

        palette->Release(palette);

        if (result != DFB_OK)

            return 0;

        return numColors;

    }

    default:

        qCritical("QDirectFBPaintDevice::metric(): Unhandled metric!");

        return 0;

    }

}

QPaintEngine *QDirectFBPaintDevice::paintEngine() const

{

    return engine;

}

#ifdef QT_DIRECTFB_SUBSURFACE

void QDirectFBPaintDevice::releaseSubSurface()

{

    Q_ASSERT(QDirectFBScreen::instance());

    if (subSurface) {

        unlockSurface();

        screen->releaseDFBSurface(subSurface);

        subSurface = 0;

    }

}

#endif

QT_END_NAMESPACE

#endif // QT_NO_QWS_DIRECTFB