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#include <exception>
#include <w32std.h>
#include <fbs.h>

#include <private/qt_s60_p.h>
#include "qpixmap.h"
#include "qpixmap_raster_p.h"
#include <qwidget.h>

QT_BEGIN_NAMESPACE

QPixmap QPixmap::grabWindow(WId winId, int x, int y, int w, int h )
{
    CWsScreenDevice* screenDevice = S60->screenDevice();
    TSize screenSize = screenDevice->SizeInPixels();

    TSize srcSize;
    // Find out if this is one of our windows.
    QSymbianControl *sControl;
    sControl = winId->MopGetObject(sControl);
    if (sControl && sControl->widget()->windowType() == Qt::Desktop) {
        // Grabbing desktop widget
        srcSize = screenSize;
    } else {
        TPoint relativePos = winId->PositionRelativeToScreen();
        x += relativePos.iX;
        y += relativePos.iY;
        srcSize = winId->Size();
    }

    TRect srcRect(TPoint(x, y), srcSize);
    // Clip to the screen
    srcRect.Intersection(TRect(screenSize));

    if (w > 0 && h > 0) {
        TRect subRect(TPoint(x, y), TSize(w, h));
        // Clip to the subRect
        srcRect.Intersection(subRect);
    }

    if (srcRect.IsEmpty())
        return QPixmap();

    TDisplayMode displayMode = screenDevice->DisplayMode();
    CFbsBitmap* temporary = q_check_ptr(new CFbsBitmap());		// CBase derived object needs check on new
    TInt error = temporary->Create(srcRect.Size(), displayMode);
    if (error == KErrNone)
        error = screenDevice->CopyScreenToBitmap(temporary, srcRect);

    if (error != KErrNone) {
        CBase::Delete(temporary);
        return QPixmap();
    }

    QPixmap pixmap = QPixmap::fromSymbianCFbsBitmap(temporary);
    CBase::Delete(temporary);
    return pixmap;
}

/*!
\since 4.6

Returns a \c CFbsBitmap that is equivalent to the QPixmap by copying the data.

It is the caller's responsibility to delete the \c CFbsBitmap after use.

\warning This function is only available on Symbian OS.

\sa fromSymbianCFbsBitmap()
*/

CFbsBitmap *QPixmap::toSymbianCFbsBitmap() const
{
    if (isNull())
        return 0;

    TDisplayMode mode;
    const QImage img = toImage();
    QImage::Format destFormat = img.format();
    switch (img.format()) {
    case QImage::Format_Mono:
        destFormat = QImage::Format_MonoLSB;
        // Fall through intended
    case QImage::Format_MonoLSB:
        mode = EGray2;
        break;
    case QImage::Format_Indexed8:
        if (img.isGrayscale())
            mode = EGray256;
        else
            mode = EColor256;
        break;
    case QImage::Format_RGB32:
        mode = EColor16MU;
        break;
    case QImage::Format_ARGB6666_Premultiplied:
    case QImage::Format_ARGB8565_Premultiplied:
    case QImage::Format_ARGB8555_Premultiplied:
        destFormat = QImage::Format_ARGB32_Premultiplied;
        // Fall through intended
    case QImage::Format_ARGB32_Premultiplied:
#if !defined(__SERIES60_31__) && !defined(__S60_32__)
        // ### TODO: Add runtime detection as well?
        mode = EColor16MAP;
            break;
#endif
        destFormat = QImage::Format_ARGB32;
        // Fall through intended
    case QImage::Format_ARGB32:
        mode = EColor16MA;
        break;
    case QImage::Format_RGB555:
        destFormat = QImage::Format_RGB16;
        // Fall through intended
    case QImage::Format_RGB16:
        mode = EColor64K;
        break;
    case QImage::Format_RGB666:
        destFormat = QImage::Format_RGB888;
        // Fall through intended
    case QImage::Format_RGB888:
        mode = EColor16M;
        break;
    case QImage::Format_RGB444:
        mode = EColor4K;
        break;
    case QImage::Format_Invalid:
        return 0;
    default:
        qWarning("Image format not supported: %d", img.format());
        return 0;
    }

    CFbsBitmap* bitmap = q_check_ptr(new CFbsBitmap());		// CBase derived object needs check on new
    TSize size(width(), height());
    if (bitmap->Create(size, mode) != KErrNone) {
        CBase::Delete(bitmap);
        return 0;
    }

    const QImage converted = img.convertToFormat(destFormat);

    bitmap->LockHeap();
    const uchar *sptr = converted.bits();
    uchar *dptr = (uchar*)bitmap->DataAddress();
    Mem::Copy(dptr, sptr, converted.numBytes());
    bitmap->UnlockHeap();
    return bitmap;
}

/*!
  \since 4.6

  Returns a QPixmap that is equivalent to the \c CFbsBitmap \a bitmap
  by copying the data. If the CFbsBitmap is not valid or is compressed
  in memory, this function will return a null QPixmap.

  \warning This function is only available on Symbian OS.

  \sa toSymbianCFbsBitmap(), {QPixmap#Pixmap Conversion}{Pixmap Conversion}
*/

QPixmap QPixmap::fromSymbianCFbsBitmap(CFbsBitmap *bitmap)
{
    if (!bitmap)
        return QPixmap();

    int width = bitmap->SizeInPixels().iWidth;
    int height = bitmap->SizeInPixels().iHeight;

    if (width <= 0 || height <= 0 || bitmap->IsCompressedInRAM())
        return QPixmap();

    TDisplayMode displayMode = bitmap->DisplayMode();
    QImage::Format format = qt_TDisplayMode2Format(displayMode);
    int bytesPerLine = CFbsBitmap::ScanLineLength(width, displayMode);
    bitmap->LockHeap();
    QImage image = QImage((const uchar*)bitmap->DataAddress(), width, height, bytesPerLine, format);
    if (displayMode == EGray2) {
        image.setNumColors(2);
        image.setColor(0, QColor(Qt::color0).rgba());
        image.setColor(1, QColor(Qt::color1).rgba());
    } else if (displayMode == EGray256) {
        for (int i=0; i < 256; ++i)
            image.setColor(i, qRgb(i, i, i));
    }else if (displayMode == EColor256) {
        const TColor256Util *palette = TColor256Util::Default();
        for (int i=0; i < 256; ++i)
            image.setColor(i, (QRgb)(palette->Color256(i).Value()));
    }
    QPixmap pixmap = QPixmap::fromImage(image.copy());
    bitmap->UnlockHeap();
    return pixmap;
}

QT_END_NAMESPACE