/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */


#include <tools/solar.h>
#include <vcl/svapp.hxx>
#include <vcl/bitmap.hxx>
#include <vcl/bitmapex.hxx>
#include <vcl/animate.hxx>
#include <vcl/gdimtf.hxx>
#include <vcl/window.hxx>
#include <vcl/graph.hxx>
#include <vcl/metaact.hxx>
#include <vcl/virdev.hxx>
#include <vcl/cvtgrf.hxx>
#include <vcl/bitmapaccess.hxx>
#include <unotools/configmgr.hxx>
#include <unotools/tempfile.hxx>
#include <osl/process.h>
#include <osl/file.hxx>
#include <osl/thread.h>
#include <memory>

class FilterConfigItem;

/*************************************************************************
|*
|*    ImpSearchEntry()
|*
|*    Description       Checks if there is a string(pDest) of length nSize
|*                      inside the memory area pSource which is nComp bytes long.
|*                      Check is NON-CASE-SENSITIVE. The return value is the
|*                      address where the string is found or NULL
|*
*************************************************************************/

static sal_uInt8* ImplSearchEntry( sal_uInt8* pSource, sal_uInt8 const * pDest, sal_uLong nComp, sal_uLong nSize )
{
    while ( nComp-- >= nSize )
    {
        sal_uLong i;
        for ( i = 0; i < nSize; i++ )
        {
            if ( ( pSource[i]&~0x20 ) != ( pDest[i]&~0x20 ) )
                break;
        }
        if ( i == nSize )
            return pSource;
        pSource++;
    }
    return nullptr;
}


// SecurityCount is the buffersize of the buffer in which we will parse for a number
static long ImplGetNumber( sal_uInt8 **pBuf, sal_uInt32& nSecurityCount )
{
    bool    bValid = true;
    bool    bNegative = false;
    long    nRetValue = 0;
    while ( ( --nSecurityCount ) && ( ( **pBuf == ' ' ) || ( **pBuf == 0x9 ) ) )
        (*pBuf)++;
    sal_uInt8 nByte = **pBuf;
    while ( nSecurityCount && ( nByte != ' ' ) && ( nByte != 0x9 ) && ( nByte != 0xd ) && ( nByte != 0xa ) )
    {
        switch ( nByte )
        {
            case '.' :
                // we'll only use the integer format
                bValid = false;
                break;
            case '-' :
                bNegative = true;
                break;
            default :
                if ( ( nByte < '0' ) || ( nByte > '9' ) )
                    nSecurityCount = 1;         // error parsing the bounding box values
                else if ( bValid )
                {
                    nRetValue *= 10;
                    nRetValue += nByte - '0';
                }
                break;
        }
        nSecurityCount--;
        nByte = *(++(*pBuf));
    }
    if ( bNegative )
        nRetValue = -nRetValue;
    return nRetValue;
}



static int ImplGetLen( sal_uInt8* pBuf, int nMax )
{
    int nLen = 0;
    while( nLen != nMax )
    {
        sal_uInt8 nDat = *pBuf++;
        if ( nDat == 0x0a || nDat == 0x25 )
            break;
        nLen++;
    }
    return nLen;
}

static void MakeAsMeta(Graphic &rGraphic)
{
    ScopedVclPtrInstance< VirtualDevice > pVDev;
    GDIMetaFile     aMtf;
    Bitmap          aBmp( rGraphic.GetBitmap() );
    Size            aSize = aBmp.GetPrefSize();

    if( !aSize.Width() || !aSize.Height() )
        aSize = Application::GetDefaultDevice()->PixelToLogic(
            aBmp.GetSizePixel(), MAP_100TH_MM );
    else
        aSize = OutputDevice::LogicToLogic( aSize,
            aBmp.GetPrefMapMode(), MAP_100TH_MM );

    pVDev->EnableOutput( false );
    aMtf.Record( pVDev );
    pVDev->DrawBitmap( Point(), aSize, rGraphic.GetBitmap() );
    aMtf.Stop();
    aMtf.WindStart();
    aMtf.SetPrefMapMode( MAP_100TH_MM );
    aMtf.SetPrefSize( aSize );
    rGraphic = aMtf;
}

static oslProcessError runProcessWithPathSearch(const OUString &rProgName,
    rtl_uString* pArgs[], sal_uInt32 nArgs, oslProcess *pProcess,
    oslFileHandle *pIn, oslFileHandle *pOut, oslFileHandle *pErr)
{
    oslProcessError result;
    oslSecurity pSecurity = osl_getCurrentSecurity();
#ifdef WNT
    /*
     * ooo#72096
     * On Window the underlying SearchPath searches in order of...
     * The directory from which the application loaded.
     * The current directory.
     * The Windows system directory.
     * The Windows directory.
     * The directories that are listed in the PATH environment variable.
     *
     * Because one of our programs is called "convert" and there is a convert
     * in the windows system directory, we want to explicitly search the PATH
     * to avoid picking up on that one if ImageMagick's convert precedes it in
     * PATH.
     *
     */
    OUString url;
    OUString path(reinterpret_cast<const sal_Unicode*>(_wgetenv(L"PATH")));

    oslFileError err = osl_searchFileURL(rProgName.pData, path.pData, &url.pData);
    if (err != osl_File_E_None)
        return osl_Process_E_NotFound;

    result = osl_executeProcess_WithRedirectedIO(url.pData,
    pArgs, nArgs, osl_Process_HIDDEN,
        pSecurity, 0, 0, 0, pProcess, pIn, pOut, pErr);
#else
    result = osl_executeProcess_WithRedirectedIO(rProgName.pData,
        pArgs, nArgs, osl_Process_SEARCHPATH | osl_Process_HIDDEN,
        pSecurity, nullptr, nullptr, 0, pProcess, pIn, pOut, pErr);
#endif
    osl_freeSecurityHandle( pSecurity );
    return result;
}

#if defined(WNT)
#    define EXESUFFIX ".exe"
#else
#    define EXESUFFIX ""
#endif

static bool RenderAsEMF(const sal_uInt8* pBuf, sal_uInt32 nBytesRead, Graphic &rGraphic)
{
    utl::TempFile aTempOutput;
    utl::TempFile aTempInput;
    aTempOutput.EnableKillingFile();
    aTempInput.EnableKillingFile();
    OUString output;
    osl::FileBase::getSystemPathFromFileURL(aTempOutput.GetURL(), output);
    OUString input;
    osl::FileBase::getSystemPathFromFileURL(aTempInput.GetURL(), input);

    SvStream* pInputStream = aTempInput.GetStream(StreamMode::WRITE);
    sal_uInt64 nCount = pInputStream->Write(pBuf, nBytesRead);
    aTempInput.CloseStream();

    //fdo#64161 pstoedit under non-windows uses libEMF to output the EMF, but
    //libEMF cannot calculate the bounding box of text, so the overall bounding
    //box is not increased to include that of any text in the eps
    //
    //-drawbb will force pstoedit to draw a pair of pixels with the bg color to
    //the topleft and bottom right of the bounding box as pstoedit sees it,
    //which libEMF will then extend its bounding box to fit
    //
    //-usebbfrominput forces pstoedit to take the original ps bounding box
    //as the bounding box as it sees it, instead of calculating its own
    //which also doesn't work for this example
    OUString arg1("-usebbfrominput");   //-usebbfrominput use the original ps bounding box
    OUString arg2("-f");
    OUString arg3("emf:-OO -drawbb");   //-drawbb mark out the bounding box extent with bg pixels
    rtl_uString *args[] =
    {
        arg1.pData, arg2.pData, arg3.pData, input.pData, output.pData
    };
    oslProcess aProcess;
    oslFileHandle pIn = nullptr;
    oslFileHandle pOut = nullptr;
    oslFileHandle pErr = nullptr;
        oslProcessError eErr = runProcessWithPathSearch(
            "pstoedit" EXESUFFIX,
            args, sizeof(args)/sizeof(rtl_uString *),
            &aProcess, &pIn, &pOut, &pErr);

    if (eErr!=osl_Process_E_None)
        return false;

    bool bRet = false;
    if (pIn) osl_closeFile(pIn);
    osl_joinProcess(aProcess);
    osl_freeProcessHandle(aProcess);
    bool bEMFSupported=true;
    if (pOut)
    {
        rtl::ByteSequence seq;
        if (osl_File_E_None == osl_readLine(pOut, reinterpret_cast<sal_Sequence **>(&seq)))
        {
            OString line( reinterpret_cast<const char *>(seq.getConstArray()), seq.getLength() );
            if (line.startsWith("Unsupported output format"))
                bEMFSupported=false;
        }
        osl_closeFile(pOut);
    }
    if (pErr) osl_closeFile(pErr);
    if (nCount == nBytesRead && bEMFSupported)
    {
        SvFileStream aFile(output, StreamMode::READ);
        if (GraphicConverter::Import(aFile, rGraphic, ConvertDataFormat::EMF) == ERRCODE_NONE)
            bRet = true;
    }

    return bRet;
}

struct WriteData
{
    oslFileHandle   m_pFile;
    const sal_uInt8 *m_pBuf;
    sal_uInt32      m_nBytesToWrite;
};

extern "C" {

static void WriteFileInThread(void *wData)
{
    sal_uInt64 nCount;
    WriteData *wdata = static_cast<WriteData *>(wData);
    osl_writeFile(wdata->m_pFile, wdata->m_pBuf, wdata->m_nBytesToWrite, &nCount);
    // The number of bytes written does not matter.
    // The helper process may close its input stream before reading it all.
    // (e.g. at "showpage" in EPS)

    // File must be closed here.
    // Otherwise, the helper process may wait for the next input,
    // then its stdout is not closed and osl_readFile() blocks.
    if (wdata->m_pFile) osl_closeFile(wdata->m_pFile);
}

}

static bool RenderAsBMPThroughHelper(const sal_uInt8* pBuf, sal_uInt32 nBytesRead,
    Graphic &rGraphic, const OUString &rProgName, rtl_uString *pArgs[], size_t nArgs)
{
    oslProcess aProcess;
    oslFileHandle pIn = nullptr;
    oslFileHandle pOut = nullptr;
    oslFileHandle pErr = nullptr;
        oslProcessError eErr = runProcessWithPathSearch(rProgName,
            pArgs, nArgs,
            &aProcess, &pIn, &pOut, &pErr);
    if (eErr!=osl_Process_E_None)
        return false;

    WriteData Data;
    Data.m_pFile = pIn;
    Data.m_pBuf = pBuf;
    Data.m_nBytesToWrite = nBytesRead;
    oslThread hThread = osl_createThread(WriteFileInThread, &Data);

    bool bRet = false;
    sal_uInt64 nCount;
    {
        SvMemoryStream aMemStm;
        sal_uInt8 aBuf[32000];
        oslFileError eFileErr = osl_readFile(pOut, aBuf, 32000, &nCount);
        while (eFileErr == osl_File_E_None && nCount)
        {
            aMemStm.Write(aBuf, sal::static_int_cast< sal_Size >(nCount));
            eFileErr = osl_readFile(pOut, aBuf, 32000, &nCount);
        }

        aMemStm.Seek(0);
        if (
            aMemStm.GetEndOfData() &&
            GraphicConverter::Import(aMemStm, rGraphic, ConvertDataFormat::BMP) == ERRCODE_NONE
           )
        {
            MakeAsMeta(rGraphic);
            bRet = true;
        }
    }
    if (pOut) osl_closeFile(pOut);
    if (pErr) osl_closeFile(pErr);
    osl_joinProcess(aProcess);
    osl_freeProcessHandle(aProcess);
    osl_joinWithThread(hThread);
    osl_destroyThread(hThread);
    return bRet;
}

static bool RenderAsBMPThroughConvert(const sal_uInt8* pBuf, sal_uInt32 nBytesRead,
    Graphic &rGraphic)
{
    // density in pixel/inch
    OUString arg1("-density");
    // since the preview is also used for PDF-Export & printing on non-PS-printers,
    // use some better quality - 300x300 should allow some resizing as well
    OUString arg2("300x300");
    // read eps from STDIN
    OUString arg3("eps:-");
    // write bmp to STDOUT
    OUString arg4("bmp:-");
    rtl_uString *args[] =
    {
        arg1.pData, arg2.pData, arg3.pData, arg4.pData
    };
    return RenderAsBMPThroughHelper(pBuf, nBytesRead, rGraphic,
        ("convert" EXESUFFIX),
        args,
        sizeof(args)/sizeof(rtl_uString *));
}

static bool RenderAsBMPThroughGS(const sal_uInt8* pBuf, sal_uInt32 nBytesRead,
    Graphic &rGraphic)
{
    OUString arg1("-q");
    OUString arg2("-dBATCH");
    OUString arg3("-dNOPAUSE");
    OUString arg4("-dPARANOIDSAFER");
    OUString arg5("-dEPSCrop");
    OUString arg6("-dTextAlphaBits=4");
    OUString arg7("-dGraphicsAlphaBits=4");
    OUString arg8("-r300x300");
    OUString arg9("-sDEVICE=bmp16m");
    OUString arg10("-sOutputFile=-");
    OUString arg11("-");
    rtl_uString *args[] =
    {
        arg1.pData, arg2.pData, arg3.pData, arg4.pData, arg5.pData,
        arg6.pData, arg7.pData, arg8.pData, arg9.pData, arg10.pData,
        arg11.pData
    };
    return RenderAsBMPThroughHelper(pBuf, nBytesRead, rGraphic,
#ifdef WNT
        "gswin32c" EXESUFFIX,
#else
        "gs" EXESUFFIX,
#endif
        args,
        sizeof(args)/sizeof(rtl_uString *));
}

static bool RenderAsBMP(const sal_uInt8* pBuf, sal_uInt32 nBytesRead, Graphic &rGraphic)
{
    if (RenderAsBMPThroughGS(pBuf, nBytesRead, rGraphic))
        return true;
    else
        return RenderAsBMPThroughConvert(pBuf, nBytesRead, rGraphic);
}

// this method adds a replacement action containing the original wmf or tiff replacement,
// so the original eps can be written when storing to ODF.
void CreateMtfReplacementAction( GDIMetaFile& rMtf, SvStream& rStrm, sal_uInt32 nOrigPos, sal_uInt32 nPSSize,
                                sal_uInt32 nPosWMF, sal_uInt32 nSizeWMF, sal_uInt32 nPosTIFF, sal_uInt32 nSizeTIFF )
{
    OString aComment("EPSReplacementGraphic");
    if ( nSizeWMF || nSizeTIFF )
    {
        SvMemoryStream aReplacement( nSizeWMF + nSizeTIFF + 28 );
        sal_uInt32 nMagic = 0xc6d3d0c5;
        sal_uInt32 nPPos = 28 + nSizeWMF + nSizeTIFF;
        sal_uInt32 nWPos = nSizeWMF ? 28 : 0;
        sal_uInt32 nTPos = nSizeTIFF ? 28 + nSizeWMF : 0;

        aReplacement.WriteUInt32( nMagic ).WriteUInt32( nPPos ).WriteUInt32( nPSSize )
                    .WriteUInt32( nWPos ).WriteUInt32( nSizeWMF )
                    .WriteUInt32( nTPos ).WriteUInt32( nSizeTIFF );
        if ( nSizeWMF )
        {
            std::unique_ptr<sal_uInt8[]> pBuf(new sal_uInt8[ nSizeWMF ]);
            rStrm.Seek( nOrigPos + nPosWMF );
            rStrm.Read( pBuf.get(), nSizeWMF );
            aReplacement.Write( pBuf.get(), nSizeWMF );
        }
        if ( nSizeTIFF )
        {
            std::unique_ptr<sal_uInt8[]> pBuf(new sal_uInt8[ nSizeTIFF ]);
            rStrm.Seek( nOrigPos + nPosTIFF );
            rStrm.Read( pBuf.get(), nSizeTIFF );
            aReplacement.Write( pBuf.get(), nSizeTIFF );
        }
        rMtf.AddAction( static_cast<MetaAction*>( new MetaCommentAction( aComment, 0, static_cast<const sal_uInt8*>(aReplacement.GetData()), aReplacement.Tell() ) ) );
    }
    else
        rMtf.AddAction( static_cast<MetaAction*>( new MetaCommentAction( aComment, 0, nullptr, 0 ) ) );
}

//there is no preview -> make a red box
void MakePreview(sal_uInt8* pBuf, sal_uInt32 nBytesRead,
    long nWidth, long nHeight, Graphic &rGraphic)
{
    GDIMetaFile aMtf;
    ScopedVclPtrInstance< VirtualDevice > pVDev;
    vcl::Font       aFont;

    pVDev->EnableOutput( false );
    aMtf.Record( pVDev );
    pVDev->SetLineColor( Color( COL_RED ) );
    pVDev->SetFillColor();

    aFont.SetColor( COL_LIGHTRED );
//  aFont.SetSize( Size( 0, 32 ) );

    pVDev->Push( PushFlags::FONT );
    pVDev->SetFont( aFont );

    Rectangle aRect( Point( 1, 1 ), Size( nWidth - 2, nHeight - 2 ) );
    pVDev->DrawRect( aRect );

    OUString aString;
    int nLen;
    sal_uInt8* pDest = ImplSearchEntry( pBuf, reinterpret_cast<sal_uInt8 const *>("%%Title:"), nBytesRead - 32, 8 );
    if ( pDest )
    {
        pDest += 8;
        if ( *pDest == ' ' )
            pDest++;
        nLen = ImplGetLen( pDest, 32 );
        sal_uInt8 aOldValue(pDest[ nLen ]); pDest[ nLen ] = 0;
        if ( strcmp( reinterpret_cast<char*>(pDest), "none" ) != 0 )
        {
            aString += " Title:" + OUString::createFromAscii( reinterpret_cast<char*>(pDest) ) + "\n";
        }
        pDest[ nLen ] = aOldValue;
    }
    pDest = ImplSearchEntry( pBuf, reinterpret_cast<sal_uInt8 const *>("%%Creator:"), nBytesRead - 32, 10 );
    if ( pDest )
    {
        pDest += 10;
        if ( *pDest == ' ' )
            pDest++;
        nLen = ImplGetLen( pDest, 32 );
        sal_uInt8 aOldValue(pDest[ nLen ]); pDest[ nLen ] = 0;
        aString += " Creator:" + OUString::createFromAscii( reinterpret_cast<char*>(pDest) ) + "\n";
        pDest[ nLen ] = aOldValue;
    }
    pDest = ImplSearchEntry( pBuf, reinterpret_cast<sal_uInt8 const *>("%%CreationDate:"), nBytesRead - 32, 15 );
    if ( pDest )
    {
        pDest += 15;
        if ( *pDest == ' ' )
            pDest++;
        nLen = ImplGetLen( pDest, 32 );
        sal_uInt8 aOldValue(pDest[ nLen ]); pDest[ nLen ] = 0;
        if ( strcmp( reinterpret_cast<char*>(pDest), "none" ) != 0 )
        {
            aString += " CreationDate:" + OUString::createFromAscii( reinterpret_cast<char*>(pDest) ) + "\n";
        }
        pDest[ nLen ] = aOldValue;
    }
    pDest = ImplSearchEntry( pBuf, reinterpret_cast<sal_uInt8 const *>("%%LanguageLevel:"), nBytesRead - 4, 16 );
    if ( pDest )
    {
        pDest += 16;
        sal_uInt32 nCount = 4;
        long nNumber = ImplGetNumber( &pDest, nCount );
        if ( nCount && ( (sal_uInt32)nNumber < 10 ) )
        {
            aString += " LanguageLevel:" + OUString::number( nNumber );
        }
    }
    pVDev->DrawText( aRect, aString, DrawTextFlags::Clip | DrawTextFlags::MultiLine );
    pVDev->Pop();
    aMtf.Stop();
    aMtf.WindStart();
    aMtf.SetPrefMapMode( MAP_POINT );
    aMtf.SetPrefSize( Size( nWidth, nHeight ) );
    rGraphic = aMtf;
}


//================== GraphicImport - the exported function ================


extern "C" SAL_DLLPUBLIC_EXPORT bool SAL_CALL
ipsGraphicImport( SvStream & rStream, Graphic & rGraphic, FilterConfigItem* )
{
    if ( rStream.GetError() )
        return false;

    Graphic     aGraphic;
    bool    bRetValue = false;
    bool    bHasPreview = false;
    sal_uInt32  nSignature, nPSStreamPos, nPSSize;
    sal_uInt32  nSizeWMF = 0;
    sal_uInt32  nPosWMF = 0;
    sal_uInt32  nSizeTIFF = 0;
    sal_uInt32  nPosTIFF = 0;
    sal_uInt32  nOrigPos = nPSStreamPos = rStream.Tell();
    SvStreamEndian nOldFormat = rStream.GetEndian();
    rStream.SetEndian( SvStreamEndian::LITTLE );
    rStream.ReadUInt32( nSignature );
    if ( nSignature == 0xc6d3d0c5 )
    {
        rStream.ReadUInt32( nPSStreamPos ).ReadUInt32( nPSSize ).ReadUInt32( nPosWMF ).ReadUInt32( nSizeWMF );

        // first we try to get the metafile grafix

        if ( nSizeWMF )
        {
            if ( nPosWMF != 0 )
            {
                rStream.Seek( nOrigPos + nPosWMF );
                if ( GraphicConverter::Import( rStream, aGraphic, ConvertDataFormat::WMF ) == ERRCODE_NONE )
                    bHasPreview = bRetValue = true;
            }
        }
        else
        {
            rStream.ReadUInt32( nPosTIFF ).ReadUInt32( nSizeTIFF );

            // else we have to get the tiff grafix

            if ( nPosTIFF && nSizeTIFF )
            {
                rStream.Seek( nOrigPos + nPosTIFF );
                if ( GraphicConverter::Import( rStream, aGraphic, ConvertDataFormat::TIF ) == ERRCODE_NONE )
                {
                    MakeAsMeta(aGraphic);
                    rStream.Seek( nOrigPos + nPosTIFF );
                    bHasPreview = bRetValue = true;
                }
            }
        }
    }
    else
    {
        nPSStreamPos = nOrigPos;            // no preview available _>so we must get the size manually
        nPSSize = rStream.Seek( STREAM_SEEK_TO_END ) - nOrigPos;
    }
    std::unique_ptr<sal_uInt8[]> pHeader( new sal_uInt8[ 22 ] );
    rStream.Seek( nPSStreamPos );
    rStream.Read( pHeader.get(), 22 );    // check PostScript header
    if ( ImplSearchEntry( pHeader.get(), reinterpret_cast<sal_uInt8 const *>("%!PS-Adobe"), 10, 10 ) &&
        ImplSearchEntry( &pHeader[ 15 ], reinterpret_cast<sal_uInt8 const *>("EPS"), 3, 3 ) )
    {
        rStream.Seek( nPSStreamPos );
        std::unique_ptr<sal_uInt8[]> pBuf( new sal_uInt8[ nPSSize ] );

        sal_uInt32 nBufStartPos = rStream.Tell();
        sal_uInt32 nBytesRead = rStream.Read( pBuf.get(), nPSSize );
        if ( nBytesRead == nPSSize )
        {
            sal_uInt32 nSecurityCount = 32;
            // if there is no tiff/wmf preview, we will parse for an preview in
            // the eps prolog
            if (!bHasPreview && nBytesRead >= nSecurityCount)
            {
                sal_uInt8* pDest = ImplSearchEntry( pBuf.get(), reinterpret_cast<sal_uInt8 const *>("%%BeginPreview:"), nBytesRead - nSecurityCount, 15 );
                if ( pDest  )
                {
                    pDest += 15;
                    long nWidth = ImplGetNumber( &pDest, nSecurityCount );
                    long nHeight = ImplGetNumber( &pDest, nSecurityCount );
                    long nBitDepth = ImplGetNumber( &pDest, nSecurityCount );
                    long nScanLines = ImplGetNumber( &pDest, nSecurityCount );
                    pDest = ImplSearchEntry( pDest, reinterpret_cast<sal_uInt8 const *>("%"), 16, 1 );       // go to the first Scanline
                    if ( nSecurityCount && pDest && nWidth && nHeight && ( ( nBitDepth == 1 ) || ( nBitDepth == 8 ) ) && nScanLines )
                    {
                        rStream.Seek( nBufStartPos + ( pDest - pBuf.get() ) );

                        Bitmap aBitmap( Size( nWidth, nHeight ), 1 );
                        BitmapWriteAccess* pAcc = aBitmap.AcquireWriteAccess();
                        if ( pAcc )
                        {
                            bool bIsValid = true;
                            sal_uInt8 nDat = 0;
                            char nByte;
                            for ( long y = 0; bIsValid && ( y < nHeight ); y++ )
                            {
                                int nBitsLeft = 0;
                                for ( long x = 0; x < nWidth; x++ )
                                {
                                    if ( --nBitsLeft < 0 )
                                    {
                                        while ( bIsValid && ( nBitsLeft != 7 ) )
                                        {
                                            rStream.ReadChar( nByte );
                                            switch ( nByte )
                                            {
                                                case 0x0a :
                                                    if ( --nScanLines < 0 )
                                                        bIsValid = false;
                                                case 0x09 :
                                                case 0x0d :
                                                case 0x20 :
                                                case 0x25 :
                                                break;
                                                default:
                                                {
                                                    if ( nByte >= '0' )
                                                    {
                                                        if ( nByte > '9' )
                                                        {
                                                            nByte &=~0x20;  // case none sensitive for hexadecimal values
                                                            nByte -= ( 'A' - 10 );
                                                            if ( nByte > 15 )
                                                                bIsValid = false;
                                                        }
                                                        else
                                                            nByte -= '0';
                                                        nBitsLeft += 4;
                                                        nDat <<= 4;
                                                        nDat |= ( nByte ^ 0xf ); // in epsi a zero bit represents white color
                                                    }
                                                    else
                                                        bIsValid = false;
                                                }
                                                break;
                                            }
                                        }
                                    }
                                    if ( nBitDepth == 1 )
                                        pAcc->SetPixelIndex( y, x, static_cast<sal_uInt8>(nDat >> nBitsLeft) & 1 );
                                    else
                                    {
                                        pAcc->SetPixelIndex( y, x, nDat ? 1 : 0 );  // nBitDepth == 8
                                        nBitsLeft = 0;
                                    }
                                }
                            }
                            if ( bIsValid )
                            {
                                ScopedVclPtrInstance<VirtualDevice> pVDev;
                                GDIMetaFile     aMtf;
                                Size            aSize;
                                pVDev->EnableOutput( false );
                                aMtf.Record( pVDev );
                                aSize = aBitmap.GetPrefSize();
                                if( !aSize.Width() || !aSize.Height() )
                                    aSize = Application::GetDefaultDevice()->PixelToLogic( aBitmap.GetSizePixel(), MAP_100TH_MM );
                                else
                                    aSize = OutputDevice::LogicToLogic( aSize, aBitmap.GetPrefMapMode(), MAP_100TH_MM );
                                pVDev->DrawBitmap( Point(), aSize, aBitmap );
                                aMtf.Stop();
                                aMtf.WindStart();
                                aMtf.SetPrefMapMode( MAP_100TH_MM );
                                aMtf.SetPrefSize( aSize );
                                aGraphic = aMtf;
                                bHasPreview = bRetValue = true;
                            }
                            Bitmap::ReleaseAccess( pAcc );
                        }
                    }
                }
            }

            sal_uInt8* pDest = ImplSearchEntry( pBuf.get(), reinterpret_cast<sal_uInt8 const *>("%%BoundingBox:"), nBytesRead, 14 );
            if ( pDest )
            {
                nSecurityCount = 100;
                long nNumb[4];
                nNumb[0] = nNumb[1] = nNumb[2] = nNumb[3] = 0;
                pDest += 14;
                for ( int i = 0; ( i < 4 ) && nSecurityCount; i++ )
                {
                    nNumb[ i ] = ImplGetNumber( &pDest, nSecurityCount );
                }
                if ( nSecurityCount)
                {
                    GDIMetaFile aMtf;

                    long nWidth =  nNumb[2] - nNumb[0] + 1;
                    long nHeight = nNumb[3] - nNumb[1] + 1;

                    // if there is no preview -> try with gs to make one
                    if (!bHasPreview && !utl::ConfigManager::IsAvoidConfig())
                    {
                        bHasPreview = RenderAsEMF(pBuf.get(), nBytesRead, aGraphic);
                        if (!bHasPreview)
                            bHasPreview = RenderAsBMP(pBuf.get(), nBytesRead, aGraphic);
                    }

                    // if there is no preview -> make a red box
                    if( !bHasPreview )
                    {
                        MakePreview(pBuf.get(), nBytesRead, nWidth, nHeight,
                            aGraphic);
                    }

                    GfxLink     aGfxLink( pBuf.get(), nPSSize, GFX_LINK_TYPE_EPS_BUFFER, true ) ;
                    pBuf.release();
                    aMtf.AddAction( static_cast<MetaAction*>( new MetaEPSAction( Point(), Size( nWidth, nHeight ),
                                                                      aGfxLink, aGraphic.GetGDIMetaFile() ) ) );
                    CreateMtfReplacementAction( aMtf, rStream, nOrigPos, nPSSize, nPosWMF, nSizeWMF, nPosTIFF, nSizeTIFF );
                    aMtf.WindStart();
                    aMtf.SetPrefMapMode( MAP_POINT );
                    aMtf.SetPrefSize( Size( nWidth, nHeight ) );
                    rGraphic = aMtf;
                    bRetValue = true;
                }
            }
        }
    }
    rStream.SetEndian(nOldFormat);
    rStream.Seek( nOrigPos );
    return bRetValue;
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */