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#include <qglobal.h> // for Q_WS_WIN define (non-PCH)

#include <QtGui/qpaintdevice.h>

#include <private/qwidget_p.h>

#include "qwindowsurface_s60_p.h"

#include "qpixmap_s60_p.h"

#include "qt_s60_p.h"

#include "private/qdrawhelper_p.h"

QT_BEGIN_NAMESPACE

struct QS60WindowSurfacePrivate

{

    QPixmap device;

    QList<QImage*> bufferImages;

};

QS60WindowSurface::QS60WindowSurface(QWidget* widget)

    : QWindowSurface(widget), d_ptr(new QS60WindowSurfacePrivate)

{

    TDisplayMode mode = S60->screenDevice()->DisplayMode();

    bool isOpaque = qt_widget_private(widget)->isOpaque;

    if (mode == EColor16MA && isOpaque)

        mode = EColor16MU; // Faster since 16MU -> 16MA is typically accelerated

    else if (mode == EColor16MU && !isOpaque)

        mode = EColor16MA; // Try for transparency anyway

    // We create empty CFbsBitmap here -> it will be resized in setGeometry

    CFbsBitmap *bitmap = q_check_ptr(new CFbsBitmap);	// CBase derived object needs check on new

    qt_symbian_throwIfError( bitmap->Create( TSize(0, 0), mode ) );

    QS60PixmapData *data = new QS60PixmapData(QPixmapData::PixmapType);

    if (data) {

        data->fromSymbianBitmap(bitmap, true);

        d_ptr->device = QPixmap(data);

    }

    setStaticContentsSupport(true);

}

QS60WindowSurface::~QS60WindowSurface()

{

    delete d_ptr;

}

void QS60WindowSurface::beginPaint(const QRegion &rgn)

{

    if (!qt_widget_private(window())->isOpaque) {

        QS60PixmapData *pixmapData = static_cast<QS60PixmapData *>(d_ptr->device.data_ptr().data());

        pixmapData->beginDataAccess();

        pixmapData->endDataAccess();

    }

}

void QS60WindowSurface::endPaint(const QRegion &)

{

    qDeleteAll(d_ptr->bufferImages);

    d_ptr->bufferImages.clear();

}

QImage* QS60WindowSurface::buffer(const QWidget *widget)

{

    if (widget->window() != window())

        return 0;

    QPaintDevice *pdev = paintDevice();

    if (!pdev)

        return 0;

    const QPoint off = offset(widget);

    QImage *img = &(static_cast<QS60PixmapData *>(d_ptr->device.data_ptr().data())->image);

    QRect rect(off, widget->size());

    rect &= QRect(QPoint(), img->size());

    if (rect.isEmpty())

        return 0;

    img = new QImage(img->scanLine(rect.y()) + rect.x() * img->depth() / 8,

                     rect.width(), rect.height(),

                     img->bytesPerLine(), img->format());

    d_ptr->bufferImages.append(img);

    return img;

}

void QS60WindowSurface::flush(QWidget *widget, const QRegion &region, const QPoint &)

{

    QWidget *window = widget->window();

    Q_ASSERT(window);

    QTLWExtra *topExtra = window->d_func()->maybeTopData();

    Q_ASSERT(topExtra);

    QRect qr = region.boundingRect();

    if (!topExtra->inExpose) {

        topExtra->inExpose = true; // Prevent DrawNow() from calling syncBackingStore() again

        TRect tr = qt_QRect2TRect(qr);

        widget->winId()->DrawNow(tr);

        topExtra->inExpose = false;

    } else {

        // This handles the case when syncBackingStore updates content outside of the

        // original drawing rectangle. This might happen if there are pending update()

        // events at the same time as we get a Draw() from Symbian.

        QRect drawRect = qt_TRect2QRect(widget->winId()->DrawableWindow()->GetDrawRect());

        if (!drawRect.contains(qr))

            widget->winId()->DrawDeferred();

    }

}

bool QS60WindowSurface::scroll(const QRegion &area, int dx, int dy)

{

    QRect rect = area.boundingRect();

    if (dx == 0 && dy == 0)

        return false;

    if (d_ptr->device.isNull())

        return false;

    QS60PixmapData *data = static_cast<QS60PixmapData*>(d_ptr->device.data_ptr().data());

    data->scroll(dx, dy, rect);

    return true;

}

QPaintDevice* QS60WindowSurface::paintDevice()

{

    return &d_ptr->device;

}

void QS60WindowSurface::setGeometry(const QRect& rect)

{

    if (rect == geometry())

        return;

    QS60PixmapData *data = static_cast<QS60PixmapData*>(d_ptr->device.data_ptr().data());

    data->resize(rect.width(), rect.height());

    QWindowSurface::setGeometry(rect);

}

CFbsBitmap* QS60WindowSurface::symbianBitmap() const

{

    QS60PixmapData *data = static_cast<QS60PixmapData*>(d_ptr->device.data_ptr().data());

    return data->cfbsBitmap;

}

QT_END_NAMESPACE