path: root/src/gui/kernel/qmime_win.cpp

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**
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** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
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** No Commercial Usage
** This file contains pre-release code and may not be distributed.
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** contained in the Technology Preview License Agreement accompanying
** this package.
**
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** 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
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#include "qmime.h"

#include "qimagereader.h"
#include "qimagewriter.h"
#include "qdatastream.h"
#include "qbuffer.h"
#include "qt_windows.h"
#include "qapplication_p.h"
#include "qtextcodec.h"
#include "qregexp.h"
#include "qalgorithms.h"
#include "qmap.h"
#include "qdnd_p.h"
#include <shlobj.h>
#include "qurl.h"
#include "qvariant.h"
#include "qtextdocument.h"
#include "qdir.h"

#if defined(Q_OS_WINCE)
#include "qguifunctions_wince.h"
#endif

QT_BEGIN_NAMESPACE

#ifndef QT_NO_IMAGEFORMAT_BMP
#ifndef CF_DIBV5
#define CF_DIBV5 17
#endif
/* The MSVC compilers allows multi-byte characters, that has the behavior of
 * that each character gets shifted into position. 0x73524742 below is for MSVC
 * equivalent to doing 'sRGB', but this does of course not work
 * on conformant C++ compilers. */
#define BMP_LCS_sRGB  0x73524742
#define BMP_LCS_GM_IMAGES  0x00000004L

struct _CIEXYZ {
    long ciexyzX, ciexyzY, ciexyzZ;
};

struct _CIEXYZTRIPLE {
    _CIEXYZ  ciexyzRed, ciexyzGreen, ciexyzBlue;
};

struct BMP_BITMAPV5HEADER {
    DWORD  bV5Size;
    LONG   bV5Width;
    LONG   bV5Height;
    WORD   bV5Planes;
    WORD   bV5BitCount;
    DWORD  bV5Compression;
    DWORD  bV5SizeImage;
    LONG   bV5XPelsPerMeter;
    LONG   bV5YPelsPerMeter;
    DWORD  bV5ClrUsed;
    DWORD  bV5ClrImportant;
    DWORD  bV5RedMask;
    DWORD  bV5GreenMask;
    DWORD  bV5BlueMask;
    DWORD  bV5AlphaMask;
    DWORD  bV5CSType;
    _CIEXYZTRIPLE bV5Endpoints;
    DWORD  bV5GammaRed;
    DWORD  bV5GammaGreen;
    DWORD  bV5GammaBlue;
    DWORD  bV5Intent;
    DWORD  bV5ProfileData;
    DWORD  bV5ProfileSize;
    DWORD  bV5Reserved;
};
static const int BMP_BITFIELDS = 3;

extern bool qt_read_dib(QDataStream&, QImage&); // qimage.cpp
extern bool qt_write_dib(QDataStream&, QImage);   // qimage.cpp
static bool qt_write_dibv5(QDataStream &s, QImage image);
static bool qt_read_dibv5(QDataStream &s, QImage &image);
#endif

//#define QMIME_DEBUG


// helpers for using global memory

static int getCf(const FORMATETC &formatetc)
{
    return formatetc.cfFormat;
}

static FORMATETC setCf(int cf)
{
    FORMATETC formatetc;
    formatetc.cfFormat = cf;
    formatetc.dwAspect = DVASPECT_CONTENT;
    formatetc.lindex = -1;
    formatetc.ptd = NULL;
    formatetc.tymed = TYMED_HGLOBAL;
    return formatetc;
}

static bool setData(const QByteArray &data, STGMEDIUM *pmedium)
{
    HGLOBAL hData = GlobalAlloc(0, data.size());
    if (!hData)
        return false;

    void *out = GlobalLock(hData);
    memcpy(out, data.data(), data.size());
    GlobalUnlock(hData);
    pmedium->tymed = TYMED_HGLOBAL;
    pmedium->hGlobal = hData;
    pmedium->pUnkForRelease = 0;
    return true;
}

static QByteArray getData(int cf, IDataObject *pDataObj)
{
    QByteArray data;
    FORMATETC formatetc = setCf(cf);
    STGMEDIUM s;
    if (pDataObj->GetData(&formatetc, &s) == S_OK) {
        DWORD * val = (DWORD*)GlobalLock(s.hGlobal);
        data = QByteArray::fromRawData((char*)val, GlobalSize(s.hGlobal));
        data.detach();
        GlobalUnlock(s.hGlobal);
        ReleaseStgMedium(&s);
    } else  {
        //Try reading IStream data
        formatetc.tymed = TYMED_ISTREAM;
        if (pDataObj->GetData(&formatetc, &s) == S_OK) {
            char szBuffer[4096];
            ULONG actualRead = 0;
            LARGE_INTEGER pos = {{0, 0}};
            //Move to front (can fail depending on the data model implemented)
            HRESULT hr = s.pstm->Seek(pos, STREAM_SEEK_SET, NULL);
            while(SUCCEEDED(hr)){
                hr = s.pstm->Read(szBuffer, sizeof(szBuffer), &actualRead);
                if (SUCCEEDED(hr) && actualRead > 0) {
                    data += QByteArray::fromRawData(szBuffer, actualRead);
                }
                if (actualRead != sizeof(szBuffer))
                    break;
            }
            data.detach();
            ReleaseStgMedium(&s);
        }
    }
    return data;
}

static bool canGetData(int cf, IDataObject * pDataObj)
{
    FORMATETC formatetc = setCf(cf);
     if (pDataObj->QueryGetData(&formatetc) != S_OK){
        formatetc.tymed = TYMED_ISTREAM;
        return pDataObj->QueryGetData(&formatetc) == S_OK;
    }
    return true;
}

class QWindowsMimeList
{
public:
    QWindowsMimeList();
    ~QWindowsMimeList();
    void addWindowsMime(QWindowsMime * mime);
    void removeWindowsMime(QWindowsMime * mime);
    QList<QWindowsMime*> windowsMimes();

private:
    void init();
    bool initialized;
    QList<QWindowsMime*> mimes;
};

Q_GLOBAL_STATIC(QWindowsMimeList, theMimeList);


/*!
    \class QWindowsMime
    \brief The QWindowsMime class maps open-standard MIME to Window Clipboard formats.
    \ingroup draganddrop

    Qt's drag-and-drop and clipboard facilities use the MIME standard.
    On X11, this maps trivially to the Xdnd protocol, but on Windows
    although some applications use MIME types to describe clipboard
    formats, others use arbitrary non-standardized naming conventions,
    or unnamed built-in formats of Windows.

    By instantiating subclasses of QWindowsMime that provide conversions
    between Windows Clipboard and MIME formats, you can convert
    proprietary clipboard formats to MIME formats.

    Qt has predefined support for the following Windows Clipboard formats:

    \table
    \header \o Windows Format \o Equivalent MIME type
    \row \o \c CF_UNICODETEXT \o \c text/plain
    \row \o \c CF_TEXT        \o \c text/plain
    \row \o \c CF_DIB         \o \c{image/xyz}, where \c xyz is
                                 a \l{QImageWriter::supportedImageFormats()}{Qt image format}
    \row \o \c CF_HDROP       \o \c text/uri-list
    \row \o \c CF_INETURL     \o \c text/uri-list
    \row \o \c CF_HTML        \o \c text/html
    \endtable

    An example use of this class would be to map the Windows Metafile
    clipboard format (\c CF_METAFILEPICT) to and from the MIME type
    \c{image/x-wmf}. This conversion might simply be adding or removing
    a header, or even just passing on the data. See \l{Drag and Drop}
    for more information on choosing and definition MIME types.

    You can check if a MIME type is convertible using canConvertFromMime() and
    can perform conversions with convertToMime() and convertFromMime().
*/

/*!
Constructs a new conversion object, adding it to the globally accessed
list of available converters.
*/
QWindowsMime::QWindowsMime()
{
    theMimeList()->addWindowsMime(this);
}

/*!
Destroys a conversion object, removing it from the global
list of available converters.
*/
QWindowsMime::~QWindowsMime()
{
    theMimeList()->removeWindowsMime(this);
}


/*!
    Registers the MIME type \a mime, and returns an ID number
    identifying the format on Windows.
*/
int QWindowsMime::registerMimeType(const QString &mime)
{
    int f = RegisterClipboardFormat(reinterpret_cast<const wchar_t *> (mime.utf16()));
    if (!f)
        qErrnoWarning("QWindowsMime::registerMimeType: Failed to register clipboard format");

    return f;
}


/*!
\fn bool QWindowsMime::canConvertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const

  Returns true if the converter can convert from the \a mimeData to
  the format specified in \a formatetc.

  All subclasses must reimplement this pure virtual function.
*/

/*!
  \fn bool QWindowsMime::canConvertToMime(const QString &mimeType, IDataObject *pDataObj) const

  Returns true if the converter can convert to the \a mimeType from
  the available formats in \a pDataObj.

  All subclasses must reimplement this pure virtual function.
*/

/*!
\fn QString QWindowsMime::mimeForFormat(const FORMATETC &formatetc) const

  Returns the mime type that will be created form the format specified
  in \a formatetc, or an empty string if this converter does not support
  \a formatetc.

  All subclasses must reimplement this pure virtual function.
*/

/*!
\fn QVector<FORMATETC> QWindowsMime::formatsForMime(const QString &mimeType, const QMimeData *mimeData) const

  Returns a QVector of FORMATETC structures representing the different windows clipboard
  formats that can be provided for the \a mimeType from the \a mimeData.

  All subclasses must reimplement this pure virtual function.
*/

/*!
    \fn QVariant QWindowsMime::convertToMime(const QString &mimeType, IDataObject *pDataObj,
                                             QVariant::Type preferredType) const

    Returns a QVariant containing the converted data for \a mimeType from \a pDataObj.
    If possible the QVariant should be of the \a preferredType to avoid needless conversions.

    All subclasses must reimplement this pure virtual function.
*/

/*!
\fn bool QWindowsMime::convertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData, STGMEDIUM * pmedium) const

  Convert the \a mimeData to the format specified in \a formatetc.
  The converted data should then be placed in \a pmedium structure.

  Return true if the conversion was successful.

  All subclasses must reimplement this pure virtual function.
*/


QWindowsMime *QWindowsMime::converterFromMime(const FORMATETC &formatetc, const QMimeData *mimeData)
{
    QList<QWindowsMime*> mimes = theMimeList()->windowsMimes();
    for (int i=mimes.size()-1; i>=0; --i) {
        if (mimes.at(i)->canConvertFromMime(formatetc, mimeData))
            return mimes.at(i);
    }
    return 0;
}

QWindowsMime *QWindowsMime::converterToMime(const QString &mimeType, IDataObject *pDataObj)
{
    QList<QWindowsMime*> mimes = theMimeList()->windowsMimes();
    for (int i=mimes.size()-1; i>=0; --i) {
        if (mimes.at(i)->canConvertToMime(mimeType, pDataObj))
            return mimes.at(i);
    }
    return 0;
}

QVector<FORMATETC> QWindowsMime::allFormatsForMime(const QMimeData *mimeData)
{
    QList<QWindowsMime*> mimes = theMimeList()->windowsMimes();
    QVector<FORMATETC> formatics;
    formatics.reserve(20);
#ifndef QT_NO_DRAGANDDROP
    QStringList formats = QInternalMimeData::formatsHelper(mimeData);
    for (int f=0; f<formats.size(); ++f) {
        for (int i=mimes.size()-1; i>=0; --i)
            formatics += mimes.at(i)->formatsForMime(formats.at(f), mimeData);
    }
#else
    Q_UNUSED(mimeData);
#endif //QT_NO_DRAGANDDROP
    return formatics;
}

QStringList QWindowsMime::allMimesForFormats(IDataObject *pDataObj)
{
    QList<QWindowsMime*> mimes = theMimeList()->windowsMimes();
    QStringList formats;
    LPENUMFORMATETC FAR fmtenum;
    HRESULT hr = pDataObj->EnumFormatEtc(DATADIR_GET, &fmtenum);

    if (hr == NOERROR) {
        FORMATETC fmtetc;
        while (S_OK == fmtenum->Next(1, &fmtetc, 0)) {
#if defined(QMIME_DEBUG) && !defined(Q_OS_WINCE)
            qDebug("QWindowsMime::allMimesForFormats()");
            wchar_t buf[256] = {0};
            GetClipboardFormatName(fmtetc.cfFormat, buf, 255);
            qDebug("CF = %d : %s", fmtetc.cfFormat, QString::fromWCharArray(buf));
#endif
            for (int i=mimes.size()-1; i>=0; --i) {
                QString format = mimes.at(i)->mimeForFormat(fmtetc);
                if (!format.isEmpty() && !formats.contains(format)) {
                    formats += format;
                }
            }
            // as documented in MSDN to avoid possible memleak
            if (fmtetc.ptd)
                CoTaskMemFree(fmtetc.ptd);
        }
        fmtenum->Release();
    }

    return formats;
}


class QWindowsMimeText : public QWindowsMime
{
public:
    bool canConvertToMime(const QString &mimeType, IDataObject *pDataObj) const;
    QVariant convertToMime(const QString &mime, LPDATAOBJECT pDataObj, QVariant::Type preferredType) const;
    QString mimeForFormat(const FORMATETC &formatetc) const;
    bool canConvertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const;
    bool convertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData, STGMEDIUM *pmedium) const;
    QVector<FORMATETC> formatsForMime(const QString &mimeType, const QMimeData *mimeData) const;
};

bool QWindowsMimeText::canConvertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const
{
    int cf = getCf(formatetc);
    return (cf == CF_UNICODETEXT || cf == CF_TEXT) && mimeData->hasText();
}

/*
text/plain is defined as using CRLF, but so many programs don't,
and programmers just look for '\n' in strings.
Windows really needs CRLF, so we ensure it here.
*/
bool QWindowsMimeText::convertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData, STGMEDIUM *pmedium) const
{
    if (canConvertFromMime(formatetc, mimeData)) {
        QByteArray data;
        int cf = getCf(formatetc);
        if (cf == CF_TEXT) {
            data = mimeData->text().toLocal8Bit();
            // Anticipate required space for CRLFs at 1/40
            int maxsize=data.size()+data.size()/40+3;
            QByteArray r(maxsize, '\0');
            char* o = r.data();
            const char* d = data.data();
            const int s = data.size();
            bool cr=false;
            int j=0;
            for (int i=0; i<s; i++) {
                char c = d[i];
                if (c=='\r')
                    cr=true;
                else {
                    if (c=='\n') {
                        if (!cr)
                            o[j++]='\r';
                    }
                    cr=false;
                }
                o[j++]=c;
                if (j+3 >= maxsize) {
                    maxsize += maxsize/4;
                    r.resize(maxsize);
                    o = r.data();
                }
            }
            o[j]=0;
            return setData(r, pmedium);
        } else if (cf == CF_UNICODETEXT) {
            QString str = mimeData->text();
            const QChar *u = str.unicode();
            QString res;
            const int s = str.length();
            int maxsize = s + s/40 + 3;
            res.resize(maxsize);
            int ri = 0;
            bool cr = false;
            for (int i=0; i < s; ++i) {
                if (*u == QLatin1Char('\r'))
                    cr = true;
                else {
                    if (*u == QLatin1Char('\n') && !cr)
                        res[ri++] = QLatin1Char('\r');
                    cr = false;
                }
                res[ri++] = *u;
                if (ri+3 >= maxsize) {
                    maxsize += maxsize/4;
                    res.resize(maxsize);
                }
                ++u;
            }
            res.truncate(ri);
            const int byteLength = res.length() * sizeof(ushort);
            QByteArray r(byteLength + 2, '\0');
            memcpy(r.data(), res.unicode(), byteLength);
            r[byteLength] = 0;
            r[byteLength+1] = 0;
            return setData(r, pmedium);
        }
    }
    return false;
}

bool QWindowsMimeText::canConvertToMime(const QString &mimeType, IDataObject *pDataObj) const
{
    return mimeType.startsWith(QLatin1String("text/plain"))
           && (canGetData(CF_UNICODETEXT, pDataObj)
           || canGetData(CF_TEXT, pDataObj));
}

QString QWindowsMimeText::mimeForFormat(const FORMATETC &formatetc) const
{
    int cf = getCf(formatetc);
    if (cf == CF_UNICODETEXT || cf == CF_TEXT)
        return QLatin1String("text/plain");
    return QString();
}


QVector<FORMATETC> QWindowsMimeText::formatsForMime(const QString &mimeType, const QMimeData *mimeData) const
{
    QVector<FORMATETC> formatics;
    if (mimeType.startsWith(QLatin1String("text/plain")) && mimeData->hasText()) {
        formatics += setCf(CF_UNICODETEXT);
        formatics += setCf(CF_TEXT);
    }
    return formatics;
}

QVariant QWindowsMimeText::convertToMime(const QString &mime, LPDATAOBJECT pDataObj, QVariant::Type preferredType) const
{
    QVariant ret;

    if (canConvertToMime(mime, pDataObj)) {
        QString str;
        QByteArray data = getData(CF_UNICODETEXT, pDataObj);
        if (!data.isEmpty()) {
            str = QString::fromWCharArray((const wchar_t *)data.data());
            str.replace(QLatin1String("\r\n"), QLatin1String("\n"));
        } else {
            data = getData(CF_TEXT, pDataObj);
            if (!data.isEmpty()) {
                const char* d = data.data();
                const int s = qstrlen(d);
                QByteArray r(data.size()+1, '\0');
                char* o = r.data();
                int j=0;
                for (int i=0; i<s; i++) {
                    char c = d[i];
                    if (c!='\r')
                        o[j++]=c;
                }
                o[j]=0;
                str = QString::fromLocal8Bit(r);
            }
        }
        if (preferredType == QVariant::String)
            ret = str;
        else
            ret = str.toUtf8();
    }

    return ret;
}

class QWindowsMimeURI : public QWindowsMime
{
public:
    QWindowsMimeURI();
    bool canConvertToMime(const QString &mimeType, IDataObject *pDataObj) const;
    QVariant convertToMime(const QString &mime, LPDATAOBJECT pDataObj, QVariant::Type preferredType) const;
    QString mimeForFormat(const FORMATETC &formatetc) const;
    bool canConvertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const;
    bool convertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData, STGMEDIUM *pmedium) const;
    QVector<FORMATETC> formatsForMime(const QString &mimeType, const QMimeData *mimeData) const;
private:
    int CF_INETURL_W; // wide char version
    int CF_INETURL;
};

QWindowsMimeURI::QWindowsMimeURI()
{
    CF_INETURL_W = QWindowsMime::registerMimeType(QLatin1String("UniformResourceLocatorW"));
    CF_INETURL = QWindowsMime::registerMimeType(QLatin1String("UniformResourceLocator"));
}

bool QWindowsMimeURI::canConvertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const
{
    if (getCf(formatetc) == CF_HDROP) {
        QList<QUrl> urls = mimeData->urls();
        for (int i=0; i<urls.size(); i++) {
            if (!urls.at(i).toLocalFile().isEmpty())
                return true;
        }
    }
    return (getCf(formatetc) == CF_INETURL_W || getCf(formatetc) == CF_INETURL) && mimeData->hasFormat(QLatin1String("text/uri-list"));
}

bool QWindowsMimeURI::convertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData, STGMEDIUM *pmedium) const
{
    if (canConvertFromMime(formatetc, mimeData)) {
        if (getCf(formatetc) == CF_HDROP) {
            QList<QUrl> urls = mimeData->urls();
            QStringList fileNames;
            int size = sizeof(DROPFILES)+2;
            for (int i=0; i<urls.size(); i++) {
                QString fn = QDir::toNativeSeparators(urls.at(i).toLocalFile());
                if (!fn.isEmpty()) {
                    size += sizeof(ushort) * (fn.length() + 1);
                    fileNames.append(fn);
                }
            }

            QByteArray result(size, '\0');
            DROPFILES* d = (DROPFILES*)result.data();
            d->pFiles = sizeof(DROPFILES);
            GetCursorPos(&d->pt); // try
            d->fNC = true;
            char* files = ((char*)d) + d->pFiles;

            d->fWide = true;
            wchar_t* f = (wchar_t*)files;
            for (int i=0; i<fileNames.size(); i++) {
                int l = fileNames.at(i).length();
                memcpy(f, fileNames.at(i).utf16(), l * sizeof(ushort));
                f += l;
                *f++ = 0;
            }
            *f = 0;

            return setData(result, pmedium);
        } else if (getCf(formatetc) == CF_INETURL_W) {
            QList<QUrl> urls = mimeData->urls();
            QByteArray result;
            QString url = urls.at(0).toString();
            result = QByteArray((const char *)url.utf16(), url.length() * sizeof(ushort));
            result.append('\0');
            result.append('\0');
            return setData(result, pmedium);
        } else if (getCf(formatetc) == CF_INETURL) {
            QList<QUrl> urls = mimeData->urls();
            QByteArray result = urls.at(0).toString().toLocal8Bit();
            return setData(result, pmedium);
        }
    }

    return false;
}

bool QWindowsMimeURI::canConvertToMime(const QString &mimeType, IDataObject *pDataObj) const
{
    return mimeType == QLatin1String("text/uri-list")
           && (canGetData(CF_HDROP, pDataObj) || canGetData(CF_INETURL_W, pDataObj) || canGetData(CF_INETURL, pDataObj));
}

QString QWindowsMimeURI::mimeForFormat(const FORMATETC &formatetc) const
{
    QString format;
    if (getCf(formatetc) == CF_HDROP || getCf(formatetc) == CF_INETURL_W || getCf(formatetc) == CF_INETURL)
        format = QLatin1String("text/uri-list");
    return format;
}

QVector<FORMATETC> QWindowsMimeURI::formatsForMime(const QString &mimeType, const QMimeData *mimeData) const
{
    QVector<FORMATETC> formatics;
    if (mimeType == QLatin1String("text/uri-list")) {
        if (canConvertFromMime(setCf(CF_HDROP), mimeData))
            formatics += setCf(CF_HDROP);
        if (canConvertFromMime(setCf(CF_INETURL_W), mimeData))
            formatics += setCf(CF_INETURL_W);
        if (canConvertFromMime(setCf(CF_INETURL), mimeData))
            formatics += setCf(CF_INETURL);
    }
    return formatics;
}

QVariant QWindowsMimeURI::convertToMime(const QString &mimeType, LPDATAOBJECT pDataObj, QVariant::Type preferredType) const
{
    if (mimeType == QLatin1String("text/uri-list")) {
        if (canGetData(CF_HDROP, pDataObj)) {
            QByteArray texturi;
            QList<QVariant> urls;

            QByteArray data = getData(CF_HDROP, pDataObj);
            if (data.isEmpty())
                return QVariant();

            LPDROPFILES hdrop = (LPDROPFILES)data.data();
            if (hdrop->fWide) {
                const wchar_t* filesw = (const wchar_t *)(data.data() + hdrop->pFiles);
                int i = 0;
                while (filesw[i]) {
                    QString fileurl = QString::fromWCharArray(filesw + i);
                    urls += QUrl::fromLocalFile(fileurl);
                    i += fileurl.length()+1;
                }
            } else {
                const char* files = (const char *)data.data() + hdrop->pFiles;
                int i=0;
                while (files[i]) {
                    urls += QUrl::fromLocalFile(QString::fromLocal8Bit(files+i));
                    i += int(strlen(files+i))+1;
                }
            }

            if (preferredType == QVariant::Url && urls.size() == 1)
                return urls.at(0);
            else if (!urls.isEmpty())
                return urls;
        } else if (canGetData(CF_INETURL_W, pDataObj)) {
            QByteArray data = getData(CF_INETURL_W, pDataObj);
            if (data.isEmpty())
                return QVariant();
            return QUrl(QString::fromWCharArray((const wchar_t *)data.constData()));
         } else if (canGetData(CF_INETURL, pDataObj)) {
            QByteArray data = getData(CF_INETURL, pDataObj);
            if (data.isEmpty())
                return QVariant();
            return QUrl(QString::fromLocal8Bit(data.constData()));
        }
    }
    return QVariant();
}

class QWindowsMimeHtml : public QWindowsMime
{
public:
    QWindowsMimeHtml();

    // for converting from Qt
    bool canConvertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const;
    bool convertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData, STGMEDIUM * pmedium) const;
    QVector<FORMATETC> formatsForMime(const QString &mimeType, const QMimeData *mimeData) const;

    // for converting to Qt
    bool canConvertToMime(const QString &mimeType, IDataObject *pDataObj) const;
    QVariant convertToMime(const QString &mime, IDataObject *pDataObj, QVariant::Type preferredType) const;
    QString mimeForFormat(const FORMATETC &formatetc) const;

private:
    int CF_HTML;
};

QWindowsMimeHtml::QWindowsMimeHtml()
{
    CF_HTML = QWindowsMime::registerMimeType(QLatin1String("HTML Format"));
}

QVector<FORMATETC> QWindowsMimeHtml::formatsForMime(const QString &mimeType, const QMimeData *mimeData) const
{
    QVector<FORMATETC> formatetcs;
    if (mimeType == QLatin1String("text/html") && (!mimeData->html().isEmpty()))
        formatetcs += setCf(CF_HTML);
    return formatetcs;
}

QString QWindowsMimeHtml::mimeForFormat(const FORMATETC &formatetc) const
{
    if (getCf(formatetc) == CF_HTML)
        return QLatin1String("text/html");
    return QString();
}

bool QWindowsMimeHtml::canConvertToMime(const QString &mimeType, IDataObject *pDataObj) const
{
    return mimeType == QLatin1String("text/html") && canGetData(CF_HTML, pDataObj);
}


bool QWindowsMimeHtml::canConvertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const
{
    return getCf(formatetc) == CF_HTML && (!mimeData->html().isEmpty());
}

/*
The windows HTML clipboard format is as follows (xxxxxxxxxx is a 10 integer number giving the positions
in bytes). Charset used is mostly utf8, but can be different, ie. we have to look for the <meta> charset tag

  Version: 1.0
  StartHTML:xxxxxxxxxx
  EndHTML:xxxxxxxxxx
  StartFragment:xxxxxxxxxx
  EndFragment:xxxxxxxxxx
  ...html...

*/
QVariant QWindowsMimeHtml::convertToMime(const QString &mime, IDataObject *pDataObj, QVariant::Type preferredType) const
{
    Q_UNUSED(preferredType);
    QVariant result;
    if (canConvertToMime(mime, pDataObj)) {
        QByteArray html = getData(CF_HTML, pDataObj);
#ifdef QMIME_DEBUG
        qDebug("QWindowsMimeHtml::convertToMime");
        qDebug("raw :");
        qDebug(html);
#endif
        int start = html.indexOf("StartFragment:");
        int end = html.indexOf("EndFragment:");

        if (start != -1) {
            int startOffset = start + 14;
            int i = startOffset;
            while (html.at(i) != '\r' && html.at(i) != '\n')
                ++i;
            QByteArray bytecount = html.mid(startOffset, i - startOffset);
            start = bytecount.toInt();
        }

        if (end != -1) {
            int endOffset = end + 12;
            int i = endOffset ;
            while (html.at(i) != '\r' && html.at(i) != '\n')
                ++i;
            QByteArray bytecount = html.mid(endOffset , i - endOffset);
            end = bytecount.toInt();
        }

        if (end > start && start > 0) {
            html = "<!--StartFragment-->" + html.mid(start, end - start);
            html += "<!--EndFragment-->";
            html.replace('\r', "");
            result = QString::fromUtf8(html);
        }
    }
    return result;
}

bool QWindowsMimeHtml::convertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData, STGMEDIUM * pmedium) const
{
    if (canConvertFromMime(formatetc, mimeData)) {
        QByteArray data = mimeData->html().toUtf8();
        QByteArray result =
            "Version:1.0\r\n"                    // 0-12
            "StartHTML:0000000105\r\n"            // 13-35
            "EndHTML:0000000000\r\n"            // 36-55
            "StartFragment:0000000000\r\n"            // 58-86
            "EndFragment:0000000000\r\n\r\n";   // 87-105

        if (data.indexOf("<!--StartFragment-->") == -1)
            result += "<!--StartFragment-->";
        result += data;
        if (data.indexOf("<!--EndFragment-->") == -1)
            result += "<!--EndFragment-->";

        // set the correct number for EndHTML
        QByteArray pos = QString::number(result.size()).toLatin1();
        memcpy((char *)(result.data() + 53 - pos.length()), pos.constData(), pos.length());

        // set correct numbers for StartFragment and EndFragment
        pos = QString::number(result.indexOf("<!--StartFragment-->") + 20).toLatin1();
        memcpy((char *)(result.data() + 79 - pos.length()), pos.constData(), pos.length());
        pos = QString::number(result.indexOf("<!--EndFragment-->")).toLatin1();
        memcpy((char *)(result.data() + 103 - pos.length()), pos.constData(), pos.length());

        return setData(result, pmedium);
    }
    return false;
}


#ifndef QT_NO_IMAGEFORMAT_BMP
class QWindowsMimeImage : public QWindowsMime
{
public:
    QWindowsMimeImage();
    // for converting from Qt
    bool canConvertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const;
    bool convertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData, STGMEDIUM * pmedium) const;
    QVector<FORMATETC> formatsForMime(const QString &mimeType, const QMimeData *mimeData) const;

    // for converting to Qt
    bool canConvertToMime(const QString &mimeType, IDataObject *pDataObj) const;
    QVariant convertToMime(const QString &mime, IDataObject *pDataObj, QVariant::Type preferredType) const;
    QString mimeForFormat(const FORMATETC &formatetc) const;
private:
    bool hasOriginalDIBV5(IDataObject *pDataObj) const;
    UINT CF_PNG;
};

QWindowsMimeImage::QWindowsMimeImage()
{
    CF_PNG = RegisterClipboardFormat(L"PNG");
}

QVector<FORMATETC> QWindowsMimeImage::formatsForMime(const QString &mimeType, const QMimeData *mimeData) const
{
    QVector<FORMATETC> formatetcs;
    if (mimeData->hasImage() && mimeType == QLatin1String("application/x-qt-image")) {
        //add DIBV5 if image has alpha channel
        QImage image = qvariant_cast<QImage>(mimeData->imageData());
        if (!image.isNull() && image.hasAlphaChannel())
            formatetcs += setCf(CF_DIBV5);
        formatetcs += setCf(CF_DIB);
    }
    return formatetcs;
}

QString QWindowsMimeImage::mimeForFormat(const FORMATETC &formatetc) const
{
    int cf = getCf(formatetc);
    if (cf == CF_DIB || cf == CF_DIBV5 || cf == int(CF_PNG))
       return QLatin1String("application/x-qt-image");
    return QString();
}

bool QWindowsMimeImage::canConvertToMime(const QString &mimeType, IDataObject *pDataObj) const
{
    if ((mimeType == QLatin1String("application/x-qt-image")) &&
        (canGetData(CF_DIB, pDataObj) || canGetData(CF_PNG, pDataObj)))
        return true;
    return false;
}

bool QWindowsMimeImage::canConvertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const
{
    int cf = getCf(formatetc);
    if (mimeData->hasImage()) {
        if (cf == CF_DIB)
            return true;
        else if (cf == CF_DIBV5) {
            //support DIBV5 conversion only if the image has alpha channel
            QImage image = qvariant_cast<QImage>(mimeData->imageData());
            if (!image.isNull() && image.hasAlphaChannel())
                return true;
        }
    }
    return false;
}

bool QWindowsMimeImage::convertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData, STGMEDIUM * pmedium) const
{
    int cf = getCf(formatetc);
    if ((cf == CF_DIB || cf == CF_DIBV5) && mimeData->hasImage()) {
        QImage img = qvariant_cast<QImage>(mimeData->imageData());
        if (img.isNull())
            return false;
        QByteArray ba;
        QDataStream s(&ba, QIODevice::WriteOnly);
        s.setByteOrder(QDataStream::LittleEndian);// Intel byte order ####
        if (cf == CF_DIB) {
            if (qt_write_dib(s, img))
                return setData(ba, pmedium);
        } else {
            if (qt_write_dibv5(s, img))
                return setData(ba, pmedium);
        }
    }
    return false;
}

bool QWindowsMimeImage::hasOriginalDIBV5(IDataObject *pDataObj) const
{
    bool isSynthesized = true;
    IEnumFORMATETC *pEnum =NULL;
    HRESULT res = pDataObj->EnumFormatEtc(1, &pEnum);
    if (res == S_OK && pEnum) {
        FORMATETC fc;
        while ((res = pEnum->Next(1, &fc, 0)) == S_OK) {
            if (fc.ptd)
                CoTaskMemFree(fc.ptd);
            if (fc.cfFormat == CF_DIB)
                break;
            else if (fc.cfFormat == CF_DIBV5) {
                isSynthesized  = false;
                break;
            }
        }
        pEnum->Release();
    }
    return !isSynthesized;
}

QVariant QWindowsMimeImage::convertToMime(const QString &mimeType, IDataObject *pDataObj, QVariant::Type preferredType) const
{
    Q_UNUSED(preferredType);
    QVariant result;
    if (mimeType != QLatin1String("application/x-qt-image"))
        return result;
    //Try to convert from a format which has more data
    //DIBV5, use only if its is not synthesized
    if (canGetData(CF_DIBV5, pDataObj) && hasOriginalDIBV5(pDataObj)) {
        QImage img;
        QByteArray data = getData(CF_DIBV5, pDataObj);
        QDataStream s(&data, QIODevice::ReadOnly);
        s.setByteOrder(QDataStream::LittleEndian);
        if (qt_read_dibv5(s, img)) { // #### supports only 32bit DIBV5
            return img;
        }
    }
    //PNG, MS Office place this (undocumented)
    if (canGetData(CF_PNG, pDataObj)) {
        QImage img;
        QByteArray data = getData(CF_PNG, pDataObj);
        if (img.loadFromData(data, "PNG")) {
            return img;
        }
    }
    //Fallback to DIB
    if (canGetData(CF_DIB, pDataObj)) {
        QImage img;
        QByteArray data = getData(CF_DIB, pDataObj);
        QDataStream s(&data, QIODevice::ReadOnly);
        s.setByteOrder(QDataStream::LittleEndian);// Intel byte order ####
        if (qt_read_dib(s, img)) { // ##### encaps "-14"
            return img;
        }
    }
    // Failed
    return result;
}
#endif

class QBuiltInMimes : public QWindowsMime
{
public:
    QBuiltInMimes();

    // for converting from Qt
    bool canConvertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const;
    bool convertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData, STGMEDIUM * pmedium) const;
    QVector<FORMATETC> formatsForMime(const QString &mimeType, const QMimeData *mimeData) const;

    // for converting to Qt
    bool canConvertToMime(const QString &mimeType, IDataObject *pDataObj) const;
    QVariant convertToMime(const QString &mime, IDataObject *pDataObj, QVariant::Type preferredType) const;
    QString mimeForFormat(const FORMATETC &formatetc) const;

private:
    QMap<int, QString> outFormats;
    QMap<int, QString> inFormats;
};

QBuiltInMimes::QBuiltInMimes()
: QWindowsMime()
{
    outFormats.insert(QWindowsMime::registerMimeType(QLatin1String("application/x-color")), QLatin1String("application/x-color"));
    inFormats.insert(QWindowsMime::registerMimeType(QLatin1String("application/x-color")), QLatin1String("application/x-color"));
}

bool QBuiltInMimes::canConvertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const
{
    // really check
    return formatetc.tymed & TYMED_HGLOBAL
        && outFormats.contains(formatetc.cfFormat)
        && mimeData->formats().contains(outFormats.value(formatetc.cfFormat));
}

bool QBuiltInMimes::convertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData, STGMEDIUM * pmedium) const
{
    if (canConvertFromMime(formatetc, mimeData)) {
        QByteArray data;
        if (outFormats.value(getCf(formatetc)) == QLatin1String("text/html")) {
            // text/html is in wide chars on windows (compatible with mozillia)
            QString html = mimeData->html();
            // same code as in the text converter up above
            const QChar *u = html.unicode();
            QString res;
            const int s = html.length();
            int maxsize = s + s/40 + 3;
            res.resize(maxsize);
            int ri = 0;
            bool cr = false;
            for (int i=0; i < s; ++i) {
                if (*u == QLatin1Char('\r'))
                    cr = true;
                else {
                    if (*u == QLatin1Char('\n') && !cr)
                        res[ri++] = QLatin1Char('\r');
                    cr = false;
                }
                res[ri++] = *u;
                if (ri+3 >= maxsize) {
                    maxsize += maxsize/4;
                    res.resize(maxsize);
                }
                ++u;
            }
            res.truncate(ri);
            const int byteLength = res.length() * sizeof(ushort);
            QByteArray r(byteLength + 2, '\0');
            memcpy(r.data(), res.unicode(), byteLength);
            r[byteLength] = 0;
            r[byteLength+1] = 0;
            data = r;
        } else {
#ifndef QT_NO_DRAGANDDROP
            data = QInternalMimeData::renderDataHelper(outFormats.value(getCf(formatetc)), mimeData);
#endif //QT_NO_DRAGANDDROP
        }
        return setData(data, pmedium);
    }
    return false;
}

QVector<FORMATETC> QBuiltInMimes::formatsForMime(const QString &mimeType, const QMimeData *mimeData) const
{
    QVector<FORMATETC> formatetcs;
    if (!outFormats.keys(mimeType).isEmpty() && mimeData->formats().contains(mimeType))
        formatetcs += setCf(outFormats.key(mimeType));
    return formatetcs;
}

bool QBuiltInMimes::canConvertToMime(const QString &mimeType, IDataObject *pDataObj) const
{
    return (!inFormats.keys(mimeType).isEmpty())
        && canGetData(inFormats.key(mimeType), pDataObj);
}

QVariant QBuiltInMimes::convertToMime(const QString &mimeType, IDataObject *pDataObj, QVariant::Type preferredType) const
{
    QVariant val;
    if (canConvertToMime(mimeType, pDataObj)) {
        QByteArray data = getData(inFormats.key(mimeType), pDataObj);
        if (!data.isEmpty()) {
#ifdef QMIME_DEBUG
            qDebug("QBuiltInMimes::convertToMime()");
#endif
            if (mimeType == QLatin1String("text/html") && preferredType == QVariant::String) {
                // text/html is in wide chars on windows (compatible with Mozilla)
                val = QString::fromWCharArray((const wchar_t *)data.data());
            } else {
                val = data; // it should be enough to return the data and let QMimeData do the rest.
            }
        }
    }
    return val;
}

QString QBuiltInMimes::mimeForFormat(const FORMATETC &formatetc) const
{
    return inFormats.value(getCf(formatetc));
}


class QLastResortMimes : public QWindowsMime
{
public:

    QLastResortMimes();
    // for converting from Qt
    bool canConvertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const;
    bool convertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData, STGMEDIUM * pmedium) const;
    QVector<FORMATETC> formatsForMime(const QString &mimeType, const QMimeData *mimeData) const;

    // for converting to Qt
    bool canConvertToMime(const QString &mimeType, IDataObject *pDataObj) const;
    QVariant convertToMime(const QString &mime, IDataObject *pDataObj, QVariant::Type preferredType) const;
    QString mimeForFormat(const FORMATETC &formatetc) const;

private:
    QMap<int, QString> formats;
    static QStringList ianaTypes;
    static QStringList excludeList;
};

QStringList QLastResortMimes::ianaTypes;
QStringList QLastResortMimes::excludeList;

QLastResortMimes::QLastResortMimes()
{
    //MIME Media-Types
    if (!ianaTypes.size()) {
        ianaTypes.append(QLatin1String("application/"));
        ianaTypes.append(QLatin1String("audio/"));
        ianaTypes.append(QLatin1String("example/"));
        ianaTypes.append(QLatin1String("image/"));
        ianaTypes.append(QLatin1String("message/"));
        ianaTypes.append(QLatin1String("model/"));
        ianaTypes.append(QLatin1String("multipart/"));
        ianaTypes.append(QLatin1String("text/"));
        ianaTypes.append(QLatin1String("video/"));
    }
    //Types handled by other classes
    if (!excludeList.size()) {
        excludeList.append(QLatin1String("HTML Format"));
        excludeList.append(QLatin1String("UniformResourceLocator"));
        excludeList.append(QLatin1String("text/html"));
        excludeList.append(QLatin1String("text/plain"));
        excludeList.append(QLatin1String("text/uri-list"));
        excludeList.append(QLatin1String("application/x-qt-image"));
        excludeList.append(QLatin1String("application/x-color"));
    }
}

bool QLastResortMimes::canConvertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const
{
    // really check
#ifndef QT_NO_DRAGANDDROP
    return formatetc.tymed & TYMED_HGLOBAL
        && (formats.contains(formatetc.cfFormat)
        && QInternalMimeData::hasFormatHelper(formats.value(formatetc.cfFormat), mimeData));
#else
    Q_UNUSED(mimeData);
    Q_UNUSED(formatetc);
    return formatetc.tymed & TYMED_HGLOBAL
        && formats.contains(formatetc.cfFormat);
#endif //QT_NO_DRAGANDDROP
}

bool QLastResortMimes::convertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData, STGMEDIUM * pmedium) const
{
#ifndef QT_NO_DRAGANDDROP
    return canConvertFromMime(formatetc, mimeData)
        && setData(QInternalMimeData::renderDataHelper(formats.value(getCf(formatetc)), mimeData), pmedium);
#else
    Q_UNUSED(mimeData);
    Q_UNUSED(formatetc);
    Q_UNUSED(pmedium);
    return false;
#endif //QT_NO_DRAGANDDROP
}

QVector<FORMATETC> QLastResortMimes::formatsForMime(const QString &mimeType, const QMimeData * /*mimeData*/) const
{
    QVector<FORMATETC> formatetcs;
    if (!formats.keys(mimeType).isEmpty()) {
        formatetcs += setCf(formats.key(mimeType));
    } else if (!excludeList.contains(mimeType, Qt::CaseInsensitive)){
        // register any other available formats
        int cf = QWindowsMime::registerMimeType(mimeType);
        QLastResortMimes *that = const_cast<QLastResortMimes *>(this);
        that->formats.insert(cf, mimeType);
        formatetcs += setCf(cf);
    }
    return formatetcs;
}
static const char x_qt_windows_mime[] = "application/x-qt-windows-mime;value=\"";

static bool isCustomMimeType(const QString &mimeType)
{
    return mimeType.startsWith(QLatin1String(x_qt_windows_mime), Qt::CaseInsensitive);
}

static QString customMimeType(const QString &mimeType)
{
    int len = sizeof(x_qt_windows_mime) - 1;
    int n = mimeType.lastIndexOf(QLatin1Char('\"'))-len;
    return mimeType.mid(len, n);
}

bool QLastResortMimes::canConvertToMime(const QString &mimeType, IDataObject *pDataObj) const
{
    if (isCustomMimeType(mimeType)) {
        QString clipFormat = customMimeType(mimeType);
        int cf = RegisterClipboardFormat(reinterpret_cast<const wchar_t *> (clipFormat.utf16()));
        return canGetData(cf, pDataObj);
    } else if (formats.keys(mimeType).isEmpty()) {
        // if it is not in there then register it an see if we can get it
        int cf = QWindowsMime::registerMimeType(mimeType);
        return canGetData(cf, pDataObj);
    } else {
        return canGetData(formats.key(mimeType), pDataObj);
    }
    return false;
}

QVariant QLastResortMimes::convertToMime(const QString &mimeType, IDataObject *pDataObj, QVariant::Type preferredType) const
{
    Q_UNUSED(preferredType);
    QVariant val;
    if (canConvertToMime(mimeType, pDataObj)) {
        QByteArray data;
        if (isCustomMimeType(mimeType)) {
            QString clipFormat = customMimeType(mimeType);
            int cf = RegisterClipboardFormat(reinterpret_cast<const wchar_t *> (clipFormat.utf16()));
            data = getData(cf, pDataObj);
        } else if (formats.keys(mimeType).isEmpty()) {
            int cf = QWindowsMime::registerMimeType(mimeType);
            data = getData(cf, pDataObj);
        } else {
            data = getData(formats.key(mimeType), pDataObj);
        }
        if (!data.isEmpty())
            val = data; // it should be enough to return the data and let QMimeData do the rest.
    }
    return val;
}

QString QLastResortMimes::mimeForFormat(const FORMATETC &formatetc) const
{
    QString format = formats.value(getCf(formatetc));
    if (!format.isEmpty())
        return format;

    wchar_t buffer[256];
    int len = GetClipboardFormatName(getCf(formatetc), buffer, 256);

    if (len) {
        QString clipFormat = QString::fromWCharArray(buffer, len);
#ifndef QT_NO_DRAGANDDROP
        if (QInternalMimeData::canReadData(clipFormat))
            format = clipFormat;
        else if((formatetc.cfFormat >= 0xC000)){
            //create the mime as custom. not registered.
            if (!excludeList.contains(clipFormat, Qt::CaseInsensitive)) {
                //check if this is a mime type
                bool ianaType = false;
                int sz = ianaTypes.size();
                for (int i = 0; i < sz; i++) {
                    if (clipFormat.startsWith(ianaTypes[i], Qt::CaseInsensitive)) {
                        ianaType =  true;
                        break;
                    }
                }
                if (!ianaType)
                    format = QLatin1String(x_qt_windows_mime) + clipFormat + QLatin1Char('\"');
                else
                    format = clipFormat;
            }
        }
#endif //QT_NO_DRAGANDDROP
    }

    return format;
}

QWindowsMimeList::QWindowsMimeList()
    : initialized(false)
{
}

QWindowsMimeList::~QWindowsMimeList()
{
    while (mimes.size())
        delete mimes.first();
}


void QWindowsMimeList::init()
{
    if (!initialized) {
        initialized = true;
#ifndef QT_NO_IMAGEFORMAT_BMP
        new QWindowsMimeImage;
#endif
        new QLastResortMimes;
        new QWindowsMimeText;
        new QWindowsMimeURI;

        new QWindowsMimeHtml;
        new QBuiltInMimes;
    }
}

void QWindowsMimeList::addWindowsMime(QWindowsMime * mime)
{
    init();
    mimes.append(mime);
}

void QWindowsMimeList::removeWindowsMime(QWindowsMime * mime)
{
    init();
    mimes.removeAll(mime);
}

QList<QWindowsMime*> QWindowsMimeList::windowsMimes()
{
    init();
    return mimes;
}

#ifndef QT_NO_IMAGEFORMAT_BMP
static bool qt_write_dibv5(QDataStream &s, QImage image)
{
    QIODevice* d = s.device();
    if (!d->isWritable())
        return false;

    //depth will be always 32
    int bpl_bmp = image.width()*4;

    BMP_BITMAPV5HEADER bi ={0};
    bi.bV5Size          = sizeof(BMP_BITMAPV5HEADER);
    bi.bV5Width         = image.width();
    bi.bV5Height        = image.height();
    bi.bV5Planes        = 1;
    bi.bV5BitCount      = 32;
    bi.bV5Compression   = BI_BITFIELDS;
    bi.bV5SizeImage     = bpl_bmp*image.height();
    bi.bV5XPelsPerMeter = 0;
    bi.bV5YPelsPerMeter = 0;
    bi.bV5ClrUsed       = 0;
    bi.bV5ClrImportant  = 0;
    bi.bV5BlueMask      = 0x000000ff;
    bi.bV5GreenMask     = 0x0000ff00;
    bi.bV5RedMask       = 0x00ff0000;
    bi.bV5AlphaMask     = 0xff000000;
    bi.bV5CSType        = BMP_LCS_sRGB;         //LCS_sRGB
    bi.bV5Intent        = BMP_LCS_GM_IMAGES;    //LCS_GM_IMAGES

    d->write(reinterpret_cast<const char*>(&bi), bi.bV5Size);
    if (s.status() != QDataStream::Ok)
        return false;

    DWORD colorSpace[3] = {0x00ff0000,0x0000ff00,0x000000ff};
    d->write(reinterpret_cast<const char*>(colorSpace), sizeof(colorSpace));
    if (s.status() != QDataStream::Ok)
        return false;

    if (image.format() != QImage::Format_ARGB32)
        image = image.convertToFormat(QImage::Format_ARGB32);

    uchar *buf = new uchar[bpl_bmp];
    uchar *b;

    memset(buf, 0, bpl_bmp);
    for (int y=image.height()-1; y>=0; y--) {
        // write the image bits
        QRgb *p = (QRgb *)image.scanLine(y);
        QRgb *end = p + image.width();
        b = buf;
        while (p < end) {
            int alpha = qAlpha(*p);
            if (alpha) {
                *b++ = qBlue(*p);
                *b++ = qGreen(*p);
                *b++ = qRed(*p);
            } else {
                //white for fully transparent pixels.
                *b++ = 0xff;
                *b++ = 0xff;
                *b++ = 0xff;
            }
            *b++ = alpha;
            p++;
        }
        d->write((char*)buf, bpl_bmp);
        if (s.status() != QDataStream::Ok) {
            delete[] buf;
            return false;
        }
    }
    delete[] buf;
    return true;
}

static int calc_shift(int mask)
{
    int result = 0;
    while (!(mask & 1)) {
        result++;
        mask >>= 1;
    }
    return result;
}

//Supports only 32 bit DIBV5
static bool qt_read_dibv5(QDataStream &s, QImage &image)
{
    BMP_BITMAPV5HEADER bi;
    QIODevice* d = s.device();
    if (d->atEnd())
        return false;

    d->read((char *)&bi, sizeof(bi));   // read BITMAPV5HEADER header
    if (s.status() != QDataStream::Ok)
        return false;

    int nbits = bi.bV5BitCount;
    int comp = bi.bV5Compression;
    if (nbits != 32 || bi.bV5Planes != 1 || comp != BMP_BITFIELDS)
        return false; //Unsupported DIBV5 format

    int w = bi.bV5Width, h = bi.bV5Height;
    int red_mask = bi.bV5RedMask;
    int green_mask = bi.bV5GreenMask;
    int blue_mask = bi.bV5BlueMask;
    int alpha_mask = bi.bV5AlphaMask;
    int red_shift = 0;
    int green_shift = 0;
    int blue_shift = 0;
    int alpha_shift = 0;
    QImage::Format format = QImage::Format_ARGB32;

    if (bi.bV5Height < 0)
        h = -h;     // support images with negative height
    if (image.size() != QSize(w, h) || image.format() != format) {
        image = QImage(w, h, format);
        if (image.isNull())     // could not create image
            return false;
    }
    image.setDotsPerMeterX(bi.bV5XPelsPerMeter);
    image.setDotsPerMeterY(bi.bV5YPelsPerMeter);
    // read color table
    DWORD colorSpace[3];
    if (d->read((char *)colorSpace, sizeof(colorSpace)) != sizeof(colorSpace))
        return false;

    red_shift = calc_shift(red_mask);
    green_shift = calc_shift(green_mask);
    blue_shift = calc_shift(blue_mask);
    if (alpha_mask) {
        alpha_shift = calc_shift(alpha_mask);
    }

    int  bpl = image.bytesPerLine();
    uchar *data = image.bits();
    register QRgb *p;
    QRgb  *end;
    uchar *buf24 = new uchar[bpl];
    int    bpl24 = ((w*nbits+31)/32)*4;
    uchar *b;
    unsigned int c;

    while (--h >= 0) {
        p = (QRgb *)(data + h*bpl);
        end = p + w;
        if (d->read((char *)buf24,bpl24) != bpl24)
            break;
        b = buf24;
        while (p < end) {
            c = *b | (*(b+1))<<8 | (*(b+2))<<16 | (*(b+3))<<24;
            *p++ = qRgba(((c & red_mask) >> red_shift) ,
                                    ((c & green_mask) >> green_shift),
                                    ((c & blue_mask) >> blue_shift),
                                    ((c & alpha_mask) >> alpha_shift));
            b += 4;
        }
    }
    delete[] buf24;

    if (bi.bV5Height < 0) {
        // Flip the image
        uchar *buf = new uchar[bpl];
        h = -bi.bV5Height;
        for (int y = 0; y < h/2; ++y) {
            memcpy(buf, data + y*bpl, bpl);
            memcpy(data + y*bpl, data + (h-y-1)*bpl, bpl);
            memcpy(data + (h-y-1)*bpl, buf, bpl);
        }
        delete [] buf;
    }

    return true;
}

#endif

QT_END_NAMESPACE