/****************************************************************************
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** Foundation and appearing in the file LICENSE.LGPL included in the
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#ifndef QT_NO_DIRECTFB

#include "qdirectfbscreen.h"
#include "qdirectfbpaintdevice.h"

QDirectFBPaintDevice::~QDirectFBPaintDevice()
{
    delete lockedImage;
}


IDirectFBSurface *QDirectFBPaintDevice::directFBSurface() const
{
    return dfbSurface;
}


// Locks the dfb surface and creates a QImage (lockedImage) from the pointer
void QDirectFBPaintDevice::lockDirectFB() {

    if (lockedImage)
        return; // Already locked

    void *mem;
    int w, h;
    DFBResult result = dfbSurface->Lock(dfbSurface, DSLF_WRITE, &mem, &bpl);
    if (result != DFB_OK || !mem) {
        DirectFBError("QDirectFBPixmapData::buffer()", result);
        return;
    }

    dfbSurface->GetSize(dfbSurface, &w, &h);
    lockedImage = new QImage(static_cast<uchar*>(mem), w, h, bpl,
                             QDirectFBScreen::getImageFormat(dfbSurface));
}


void QDirectFBPaintDevice::unlockDirectFB()
{
    if (!lockedImage || !QDirectFBScreen::instance())
        return;

    dfbSurface->Unlock(dfbSurface);
    delete lockedImage;
    lockedImage = 0;
}


void* QDirectFBPaintDevice::memory() const
{
    QDirectFBPaintDevice* that = const_cast<QDirectFBPaintDevice*>(this);
    that->lockDirectFB();
    Q_ASSERT(that->lockedImage);
    return that->lockedImage->bits();
}


QImage::Format QDirectFBPaintDevice::format() const
{
    return QDirectFBScreen::getImageFormat(dfbSurface);
}


int QDirectFBPaintDevice::bytesPerLine() const
{
    if (bpl == -1) {
        // Can only get the stride when we lock the surface
        Q_ASSERT(!lockedImage);
        QDirectFBPaintDevice* that = const_cast<QDirectFBPaintDevice*>(this);
        that->lockDirectFB();
        Q_ASSERT(bpl != -1);
        that->unlockDirectFB();
    }
    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;

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

    switch (metric) {
    case QPaintDevice::PdmWidth:
        return w;
    case QPaintDevice::PdmHeight:
        return h;
    case QPaintDevice::PdmWidthMM:
        return (w * 1000) / dotsPerMeterX();
    case QPaintDevice::PdmHeightMM:
        return (h * 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:
        DFBSurfacePixelFormat format;
        dfbSurface->GetPixelFormat(dfbSurface, &format);
        return QDirectFBScreen::depth(format);
    case QPaintDevice::PdmNumColors: {
       if (lockedImage)
            return lockedImage->numColors();

        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;
    }
}

#endif