pdfwriter_impl.cxx

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/* -*- 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 <sal/config.h>
#include <config_crypto.h>
 
#include <sal/types.h>
 
#include <math.h>
#include <algorithm>
#include <string_view>
 
#include <lcms2.h>
 
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <basegfx/polygon/b2dpolypolygon.hxx>
#include <basegfx/polygon/b2dpolypolygoncutter.hxx>
#include <basegfx/polygon/b2dpolypolygontools.hxx>
#include <memory>
#include <com/sun/star/io/XOutputStream.hpp>
#include <com/sun/star/util/URL.hpp>
#include <com/sun/star/util/URLTransformer.hpp>
#include <comphelper/processfactory.hxx>
#include <comphelper/string.hxx>
#include <comphelper/xmlencode.hxx>
#include <cppuhelper/implbase.hxx>
#include <i18nlangtag/languagetag.hxx>
#include <o3tl/numeric.hxx>
#include <o3tl/safeint.hxx>
#include <o3tl/temporary.hxx>
#include <officecfg/Office/Common.hxx>
#include <osl/file.hxx>
#include <osl/thread.h>
#include <rtl/digest.h>
#include <rtl/uri.hxx>
#include <rtl/ustrbuf.hxx>
#include <svl/cryptosign.hxx>
#include <sal/log.hxx>
#include <svl/urihelper.hxx>
#include <tools/fract.hxx>
#include <tools/stream.hxx>
#include <tools/helpers.hxx>
#include <tools/urlobj.hxx>
#include <tools/UnitConversion.hxx>
#include <tools/zcodec.hxx>
#include <unotools/configmgr.hxx>
#include <vcl/bitmapex.hxx>
#include <vcl/canvastools.hxx>
#include <vcl/cvtgrf.hxx>
#include <vcl/fontcharmap.hxx>
#include <vcl/glyphitemcache.hxx>
#include <vcl/kernarray.hxx>
#include <vcl/lineinfo.hxx>
#include <vcl/metric.hxx>
#include <vcl/mnemonic.hxx>
#include <vcl/settings.hxx>
#include <strhelper.hxx>
#include <vcl/svapp.hxx>
#include <vcl/virdev.hxx>
#include <vcl/filter/pdfdocument.hxx>
#include <vcl/filter/PngImageReader.hxx>
#include <comphelper/hash.hxx>
 
#include <svdata.hxx>
#include <bitmap/BitmapWriteAccess.hxx>
#include <fontsubset.hxx>
#include <font/EmphasisMark.hxx>
#include <font/PhysicalFontFace.hxx>
#include <salgdi.hxx>
#include <textlayout.hxx>
#include <textlineinfo.hxx>
#include <impglyphitem.hxx>
#include <pdf/XmpMetadata.hxx>
#include <pdf/objectcopier.hxx>
#include <pdf/pdfwriter_impl.hxx>
#include <pdf/PdfConfig.hxx>
#include <o3tl/sorted_vector.hxx>
#include <frozen/bits/defines.h>
#include <frozen/bits/elsa_std.h>
#include <frozen/map.h>
 
using namespace::com::sun::star;
 
static bool g_bDebugDisableCompression = getenv("VCL_DEBUG_DISABLE_PDFCOMPRESSION");
 
namespace
{
 
constexpr sal_Int32 nLog10Divisor = 3;
constexpr double fDivisor = 1000.0;
 
constexpr double pixelToPoint(double px)
{
    return px / fDivisor;
}
 
constexpr sal_Int32 pointToPixel(double pt)
{
    return sal_Int32(pt * fDivisor);
}
 
void appendObjectID(sal_Int32 nObjectID, OStringBuffer & aLine)
{
    aLine.append(nObjectID);
    aLine.append(" 0 obj\n");
}
 
void appendObjectReference(sal_Int32 nObjectID, OStringBuffer & aLine)
{
    aLine.append(nObjectID);
    aLine.append(" 0 R ");
}
 
void appendHex(sal_Int8 nInt, OStringBuffer& rBuffer)
{
    static const char pHexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7',
                                           '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
    rBuffer.append( pHexDigits[ (nInt >> 4) & 15 ] );
    rBuffer.append( pHexDigits[ nInt & 15 ] );
}
 
void appendName( std::u16string_view rStr, OStringBuffer& rBuffer )
{
// FIXME i59651 add a check for max length of 127 chars? Per PDF spec 1.4, appendix C.1
// I guess than when reading the #xx sequence it will count for a single character.
    OString aStr( OUStringToOString( rStr, RTL_TEXTENCODING_UTF8 ) );
    int nLen = aStr.getLength();
    for( int i = 0; i < nLen; i++ )
    {
        /*  #i16920# PDF recommendation: output UTF8, any byte
         *  outside the interval [33(=ASCII'!');126(=ASCII'~')]
         *  should be escaped hexadecimal
         *  for the sake of ghostscript which also reads PDF
         *  but has a narrower acceptance rate we only pass
         *  alphanumerics and '-' literally.
         */
        if( (aStr[i] >= 'A' && aStr[i] <= 'Z' ) ||
            (aStr[i] >= 'a' && aStr[i] <= 'z' ) ||
            (aStr[i] >= '0' && aStr[i] <= '9' ) ||
            aStr[i] == '-' )
        {
            rBuffer.append( aStr[i] );
        }
        else
        {
            rBuffer.append( '#' );
            appendHex( static_cast<sal_Int8>(aStr[i]), rBuffer );
        }
    }
}
 
void appendName( const char* pStr, OStringBuffer& rBuffer )
{
    // FIXME i59651 see above
    while( pStr && *pStr )
    {
        if( (*pStr >= 'A' && *pStr <= 'Z' ) ||
            (*pStr >= 'a' && *pStr <= 'z' ) ||
            (*pStr >= '0' && *pStr <= '9' ) ||
            *pStr == '-' )
        {
            rBuffer.append( *pStr );
        }
        else
        {
            rBuffer.append( '#' );
            appendHex( static_cast<sal_Int8>(*pStr), rBuffer );
        }
        pStr++;
    }
}
 
//used only to emit encoded passwords
void appendLiteralString( const char* pStr, sal_Int32 nLength, OStringBuffer& rBuffer )
{
    while( nLength )
    {
        switch( *pStr )
        {
        case '\n' :
            rBuffer.append( "\\n" );
            break;
        case '\r' :
            rBuffer.append( "\\r" );
            break;
        case '\t' :
            rBuffer.append( "\\t" );
            break;
        case '\b' :
            rBuffer.append( "\\b" );
            break;
        case '\f' :
            rBuffer.append( "\\f" );
            break;
        case '(' :
        case ')' :
        case '\\' :
            rBuffer.append( "\\" );
            rBuffer.append( static_cast<char>(*pStr) );
            break;
        default:
            rBuffer.append( static_cast<char>(*pStr) );
            break;
        }
        pStr++;
        nLength--;
    }
}
 
/*
 * Convert a string before using it.
 *
 * This string conversion function is needed because the destination name
 * in a PDF file seen through an Internet browser should be
 * specially crafted, in order to be used directly by the browser.
 * In this way the fragment part of a hyperlink to a PDF file (e.g. something
 * as 'test1/test2/a-file.pdf\#thefragment) will be (hopefully) interpreted by the
 * PDF reader (currently only Adobe Reader plug-in seems to be working that way) called
 * from inside the Internet browser as: 'open the file test1/test2/a-file.pdf
 * and go to named destination thefragment using default zoom'.
 * The conversion is needed because in case of a fragment in the form: Slide%201
 * (meaning Slide 1) as it is converted obeying the Inet rules, it will become Slide25201
 * using this conversion, in both the generated named destinations, fragment and GoToR
 * destination.
 *
 * The names for destinations are name objects and so they don't need to be encrypted
 * even though they expose the content of PDF file (e.g. guessing the PDF content from the
 * destination name).
 *
 * Further limitation: it is advisable to use standard ASCII characters for
 * OOo bookmarks.
*/
void appendDestinationName( const OUString& rString, OStringBuffer& rBuffer )
{
    const sal_Unicode* pStr = rString.getStr();
    sal_Int32 nLen = rString.getLength();
    for( int i = 0; i < nLen; i++ )
    {
        sal_Unicode aChar = pStr[i];
        if( (aChar >= '0' && aChar <= '9' ) ||
            (aChar >= 'a' && aChar <= 'z' ) ||
            (aChar >= 'A' && aChar <= 'Z' ) ||
            aChar == '-' )
        {
            rBuffer.append(static_cast<char>(aChar));
        }
        else
        {
            sal_Int8 aValueHigh = sal_Int8(aChar >> 8);
            if(aValueHigh > 0)
                appendHex( aValueHigh, rBuffer );
            appendHex( static_cast<sal_Int8>(aChar & 255 ), rBuffer );
        }
    }
}
 
} // end anonymous namespace
 
namespace vcl
{
const sal_uInt8 PDFWriterImpl::s_nPadString[32] =
{
    0x28, 0xBF, 0x4E, 0x5E, 0x4E, 0x75, 0x8A, 0x41, 0x64, 0x00, 0x4E, 0x56, 0xFF, 0xFA, 0x01, 0x08,
    0x2E, 0x2E, 0x00, 0xB6, 0xD0, 0x68, 0x3E, 0x80, 0x2F, 0x0C, 0xA9, 0xFE, 0x64, 0x53, 0x69, 0x7A
};
 
namespace
{
 
template < class GEOMETRY >
GEOMETRY lcl_convert( const MapMode& _rSource, const MapMode& _rDest, OutputDevice* _pPixelConversion, const GEOMETRY& _rObject )
{
    GEOMETRY aPoint;
    if ( MapUnit::MapPixel == _rSource.GetMapUnit() )
    {
        aPoint = _pPixelConversion->PixelToLogic( _rObject, _rDest );
    }
    else
    {
        aPoint = OutputDevice::LogicToLogic( _rObject, _rSource, _rDest );
    }
    return aPoint;
}
 
void removePlaceholderSE(std::vector<PDFStructureElement> & rStructure, PDFStructureElement& rEle);
 
} // end anonymous namespace
 
void PDFWriter::AppendUnicodeTextString(const OUString& rString, OStringBuffer& rBuffer)
{
    rBuffer.append( "FEFF" );
    const sal_Unicode* pStr = rString.getStr();
    sal_Int32 nLen = rString.getLength();
    for( int i = 0; i < nLen; i++ )
    {
        sal_Unicode aChar = pStr[i];
        appendHex( static_cast<sal_Int8>(aChar >> 8), rBuffer );
        appendHex( static_cast<sal_Int8>(aChar & 255 ), rBuffer );
    }
}
 
void PDFWriterImpl::createWidgetFieldName( sal_Int32 i_nWidgetIndex, const PDFWriter::AnyWidget& i_rControl )
{
    /* #i80258# previously we use appendName here
       however we need a slightly different coding scheme than the normal
       name encoding for field names
    */
    const OUString& rName = i_rControl.Name;
    OString aStr( OUStringToOString( rName, RTL_TEXTENCODING_UTF8 ) );
    int nLen = aStr.getLength();
 
    OStringBuffer aBuffer( rName.getLength()+64 );
    for( int i = 0; i < nLen; i++ )
    {
        /*  #i16920# PDF recommendation: output UTF8, any byte
         *  outside the interval [32(=ASCII' ');126(=ASCII'~')]
         *  should be escaped hexadecimal
         */
        if( aStr[i] >= 32 && aStr[i] <= 126 )
            aBuffer.append( aStr[i] );
        else
        {
            aBuffer.append( '#' );
            appendHex( static_cast<sal_Int8>(aStr[i]), aBuffer );
        }
    }
 
    OString aFullName( aBuffer.makeStringAndClear() );
 
    /* #i82785# create hierarchical fields down to the for each dot in i_rName */
    sal_Int32 nTokenIndex = 0, nLastTokenIndex = 0;
    OString aPartialName;
    OString aDomain;
    do
    {
        nLastTokenIndex = nTokenIndex;
        aPartialName = aFullName.getToken( 0, '.', nTokenIndex );
        if( nTokenIndex != -1 )
        {
            // find or create a hierarchical field
            // first find the fully qualified name up to this field
            aDomain = aFullName.copy( 0, nTokenIndex-1 );
            std::unordered_map< OString, sal_Int32 >::const_iterator it = m_aFieldNameMap.find( aDomain );
            if( it == m_aFieldNameMap.end() )
            {
                 // create new hierarchy field
                sal_Int32 nNewWidget = m_aWidgets.size();
                m_aWidgets.emplace_back( );
                m_aWidgets[nNewWidget].m_nObject = createObject();
                m_aWidgets[nNewWidget].m_eType = PDFWriter::Hierarchy;
                m_aWidgets[nNewWidget].m_aName = aPartialName;
                m_aWidgets[i_nWidgetIndex].m_nParent = m_aWidgets[nNewWidget].m_nObject;
                m_aFieldNameMap[aDomain] = nNewWidget;
                m_aWidgets[i_nWidgetIndex].m_nParent = m_aWidgets[nNewWidget].m_nObject;
                if( nLastTokenIndex > 0 )
                {
                    // this field is not a root field and
                    // needs to be inserted to its parent
                    OString aParentDomain( aDomain.copy( 0, nLastTokenIndex-1 ) );
                    it = m_aFieldNameMap.find( aParentDomain );
                    OSL_ENSURE( it != m_aFieldNameMap.end(), "field name not found" );
                    if( it != m_aFieldNameMap.end()  )
                    {
                        OSL_ENSURE( it->second < sal_Int32(m_aWidgets.size()), "invalid field number entry" );
                        if( it->second < sal_Int32(m_aWidgets.size()) )
                        {
                            PDFWidget& rParentField( m_aWidgets[it->second] );
                            rParentField.m_aKids.push_back( m_aWidgets[nNewWidget].m_nObject );
                            rParentField.m_aKidsIndex.push_back( nNewWidget );
                            m_aWidgets[nNewWidget].m_nParent = rParentField.m_nObject;
                        }
                    }
                }
            }
            else if( m_aWidgets[it->second].m_eType != PDFWriter::Hierarchy )
            {
                // this is invalid, someone tries to have a terminal field as parent
                // example: a button with the name foo.bar exists and
                // another button is named foo.bar.no
                // workaround: put the second terminal field as much up in the hierarchy as
                // necessary to have a non-terminal field as parent (or none at all)
                // since it->second already is terminal, we just need to use its parent
                aDomain.clear();
                aPartialName = aFullName.copy( aFullName.lastIndexOf( '.' )+1 );
                if( nLastTokenIndex > 0 )
                {
                    aDomain = aFullName.copy( 0, nLastTokenIndex-1 );
                    aFullName = aDomain + "." + aPartialName;
                }
                else
                    aFullName = aPartialName;
                break;
            }
        }
    } while( nTokenIndex != -1 );
 
    // insert widget into its hierarchy field
    if( !aDomain.isEmpty() )
    {
        std::unordered_map< OString, sal_Int32 >::const_iterator it = m_aFieldNameMap.find( aDomain );
        if( it != m_aFieldNameMap.end() )
        {
            OSL_ENSURE( it->second >= 0 && o3tl::make_unsigned(it->second) < m_aWidgets.size(), "invalid field index" );
            if( it->second >= 0 && o3tl::make_unsigned(it->second) < m_aWidgets.size() )
            {
                m_aWidgets[i_nWidgetIndex].m_nParent = m_aWidgets[it->second].m_nObject;
                m_aWidgets[it->second].m_aKids.push_back( m_aWidgets[i_nWidgetIndex].m_nObject);
                m_aWidgets[it->second].m_aKidsIndex.push_back( i_nWidgetIndex );
            }
        }
    }
 
    if( aPartialName.isEmpty() )
    {
        // how funny, an empty field name
        if( i_rControl.getType() == PDFWriter::RadioButton )
        {
            aPartialName  = "RadioGroup" +
                OString::number( static_cast<const PDFWriter::RadioButtonWidget&>(i_rControl).RadioGroup );
        }
        else
            aPartialName = OString( "Widget" );
    }
 
    if( ! m_aContext.AllowDuplicateFieldNames )
    {
        std::unordered_map<OString, sal_Int32>::iterator it = m_aFieldNameMap.find( aFullName );
 
        if( it != m_aFieldNameMap.end() ) // not unique
        {
            std::unordered_map< OString, sal_Int32 >::const_iterator check_it;
            OString aTry;
            sal_Int32 nTry = 2;
            do
            {
                aTry = aFullName + "_" + OString::number(nTry++);
                check_it = m_aFieldNameMap.find( aTry );
            } while( check_it != m_aFieldNameMap.end() );
            aFullName = aTry;
            m_aFieldNameMap[ aFullName ] = i_nWidgetIndex;
            aPartialName = aFullName.copy( aFullName.lastIndexOf( '.' )+1 );
        }
        else
            m_aFieldNameMap[ aFullName ] = i_nWidgetIndex;
    }
 
    // finally
    m_aWidgets[i_nWidgetIndex].m_aName = aPartialName;
}
 
namespace
{
 
void appendFixedInt( sal_Int32 nValue, OStringBuffer& rBuffer )
{
    if( nValue < 0 )
    {
        rBuffer.append( '-' );
        nValue = -nValue;
    }
    sal_Int32 nFactor = 1, nDiv = nLog10Divisor;
    while( nDiv-- )
        nFactor *= 10;
 
    sal_Int32 nInt = nValue / nFactor;
    rBuffer.append( nInt );
    if (nFactor > 1 && nValue % nFactor)
    {
        rBuffer.append( '.' );
        do
        {
            nFactor /= 10;
            rBuffer.append((nValue / nFactor) % 10);
        }
        while (nFactor > 1 && nValue % nFactor); // omit trailing zeros
    }
}
 
// appends a double. PDF does not accept exponential format, only fixed point
void appendDouble( double fValue, OStringBuffer& rBuffer, sal_Int32 nPrecision = 10 )
{
    bool bNeg = false;
    if( fValue < 0.0 )
    {
        bNeg = true;
        fValue=-fValue;
    }
 
    sal_Int64 nInt = static_cast<sal_Int64>(fValue);
    fValue -= static_cast<double>(nInt);
    // optimizing hardware may lead to a value of 1.0 after the subtraction
    if( rtl::math::approxEqual(fValue, 1.0) || log10( 1.0-fValue ) <= -nPrecision )
    {
        nInt++;
        fValue = 0.0;
    }
    sal_Int64 nFrac = 0;
    if( fValue )
    {
        fValue *= pow( 10.0, static_cast<double>(nPrecision) );
        nFrac = static_cast<sal_Int64>(fValue);
    }
    if( bNeg && ( nInt || nFrac ) )
        rBuffer.append( '-' );
    rBuffer.append( nInt );
    if( !nFrac )
        return;
 
    int i;
    rBuffer.append( '.' );
    sal_Int64 nBound = static_cast<sal_Int64>(pow( 10.0, nPrecision - 1.0 )+0.5);
    for ( i = 0; ( i < nPrecision ) && nFrac; i++ )
    {
        sal_Int64 nNumb = nFrac / nBound;
        nFrac -= nNumb * nBound;
        rBuffer.append( nNumb );
        nBound /= 10;
    }
}
 
void appendColor( const Color& rColor, OStringBuffer& rBuffer, bool bConvertToGrey )
{
 
    if( rColor == COL_TRANSPARENT )
        return;
 
    if( bConvertToGrey )
    {
        sal_uInt8 cByte = rColor.GetLuminance();
        appendDouble( static_cast<double>(cByte) / 255.0, rBuffer );
    }
    else
    {
        appendDouble( static_cast<double>(rColor.GetRed()) / 255.0, rBuffer );
        rBuffer.append( ' ' );
        appendDouble( static_cast<double>(rColor.GetGreen()) / 255.0, rBuffer );
        rBuffer.append( ' ' );
        appendDouble( static_cast<double>(rColor.GetBlue()) / 255.0, rBuffer );
    }
}
 
} // end anonymous namespace
 
void PDFWriterImpl::appendStrokingColor( const Color& rColor, OStringBuffer& rBuffer )
{
    if( rColor != COL_TRANSPARENT )
    {
        bool bGrey = m_aContext.ColorMode == PDFWriter::DrawGreyscale;
        appendColor( rColor, rBuffer, bGrey );
        rBuffer.append( bGrey ? " G" : " RG" );
    }
}
 
void PDFWriterImpl::appendNonStrokingColor( const Color& rColor, OStringBuffer& rBuffer )
{
    if( rColor != COL_TRANSPARENT )
    {
        bool bGrey = m_aContext.ColorMode == PDFWriter::DrawGreyscale;
        appendColor( rColor, rBuffer, bGrey );
        rBuffer.append( bGrey ? " g" : " rg" );
    }
}
 
namespace
{
 
void appendPdfTimeDate(OStringBuffer & rBuffer,
    sal_Int16 year, sal_uInt16 month, sal_uInt16 day, sal_uInt16 hours, sal_uInt16 minutes, sal_uInt16 seconds, sal_Int32 tzDelta)
{
    rBuffer.append("D:");
    rBuffer.append(char('0' + ((year / 1000) % 10)));
    rBuffer.append(char('0' + ((year / 100) % 10)));
    rBuffer.append(char('0' + ((year / 10) % 10)));
    rBuffer.append(char('0' + (year % 10)));
    rBuffer.append(char('0' + ((month / 10) % 10)));
    rBuffer.append(char('0' + (month % 10)));
    rBuffer.append(char('0' + ((day / 10) % 10)));
    rBuffer.append(char('0' + (day % 10)));
    rBuffer.append(char('0' + ((hours / 10) % 10)));
    rBuffer.append(char('0' + (hours % 10)));
    rBuffer.append(char('0' + ((minutes / 10) % 10)));
    rBuffer.append(char('0' + (minutes % 10)));
    rBuffer.append(char('0' + ((seconds / 10) % 10)));
    rBuffer.append(char('0' + (seconds % 10)));
 
    if (tzDelta == 0)
    {
        rBuffer.append("Z");
    }
    else
    {
        if (tzDelta > 0 )
            rBuffer.append("+");
        else
        {
            rBuffer.append("-");
            tzDelta = -tzDelta;
        }
 
        rBuffer.append(char('0' + ((tzDelta / 36000) % 10)));
        rBuffer.append(char('0' + ((tzDelta / 3600) % 10)));
        rBuffer.append("'");
        rBuffer.append(char('0' + ((tzDelta / 600) % 6)));
        rBuffer.append(char('0' + ((tzDelta / 60) % 10)));
    }
}
 
} // end namespace
 
PDFPage::PDFPage( PDFWriterImpl* pWriter, double nPageWidth, double nPageHeight, PDFWriter::Orientation eOrientation )
        :
        m_pWriter( pWriter ),
        m_nPageWidth( nPageWidth ),
        m_nPageHeight( nPageHeight ),
        m_nUserUnit( 1 ),
        m_eOrientation( eOrientation ),
        m_nPageObject( 0 ),  // invalid object number
        m_nStreamLengthObject( 0 ),
        m_nBeginStreamPos( 0 ),
        m_eTransition( PDFWriter::PageTransition::Regular ),
        m_nTransTime( 0 )
{
    // object ref must be only ever updated in emit()
    m_nPageObject = m_pWriter->createObject();
 
    switch (m_pWriter->m_aContext.Version)
    {
        // 1.6 or later
        default:
            m_nUserUnit = std::ceil(std::max(nPageWidth, nPageHeight) / 14400.0);
            break;
        case PDFWriter::PDFVersion::PDF_1_4:
        case PDFWriter::PDFVersion::PDF_1_5:
        case PDFWriter::PDFVersion::PDF_A_1:
            break;
    }
}
 
void PDFPage::beginStream()
{
    if (g_bDebugDisableCompression)
    {
        m_pWriter->emitComment("PDFWriterImpl::PDFPage::beginStream, +");
    }
    m_aStreamObjects.push_back(m_pWriter->createObject());
    if( ! m_pWriter->updateObject( m_aStreamObjects.back() ) )
        return;
 
    m_nStreamLengthObject = m_pWriter->createObject();
    // write content stream header
    OStringBuffer aLine(
        OString::number(m_aStreamObjects.back())
        + " 0 obj\n<</Length "
        + OString::number( m_nStreamLengthObject )
        + " 0 R" );
    if (!g_bDebugDisableCompression)
        aLine.append( "/Filter/FlateDecode" );
    aLine.append( ">>\nstream\n" );
    if( ! m_pWriter->writeBuffer( aLine ) )
        return;
    if (osl::File::E_None != m_pWriter->m_aFile.getPos(m_nBeginStreamPos))
    {
        m_pWriter->m_aFile.close();
        m_pWriter->m_bOpen = false;
    }
    if (!g_bDebugDisableCompression)
        m_pWriter->beginCompression();
    m_pWriter->checkAndEnableStreamEncryption( m_aStreamObjects.back() );
}
 
void PDFPage::endStream()
{
    if (!g_bDebugDisableCompression)
        m_pWriter->endCompression();
    sal_uInt64 nEndStreamPos;
    if (osl::File::E_None != m_pWriter->m_aFile.getPos(nEndStreamPos))
    {
        m_pWriter->m_aFile.close();
        m_pWriter->m_bOpen = false;
        return;
    }
    m_pWriter->disableStreamEncryption();
    if( ! m_pWriter->writeBuffer( "\nendstream\nendobj\n\n" ) )
        return;
    // emit stream length object
    if( ! m_pWriter->updateObject( m_nStreamLengthObject ) )
        return;
    OString aLine =
        OString::number( m_nStreamLengthObject ) +
        " 0 obj\n"  +
        OString::number( static_cast<sal_Int64>(nEndStreamPos-m_nBeginStreamPos) ) +
        "\nendobj\n\n";
    m_pWriter->writeBuffer( aLine );
}
 
bool PDFPage::emit(sal_Int32 nParentObject )
{
    m_pWriter->MARK("PDFPage::emit");
    // emit page object
    if( ! m_pWriter->updateObject( m_nPageObject ) )
        return false;
    OStringBuffer aLine(
        OString::number(m_nPageObject)
        + " 0 obj\n"
          "<</Type/Page/Parent "
        + OString::number(nParentObject)
        + " 0 R"
        "/Resources "
        + OString::number(m_pWriter->getResourceDictObj())
        + " 0 R" );
    if( m_nPageWidth && m_nPageHeight )
    {
        aLine.append( "/MediaBox[0 0 "
            + OString::number(m_nPageWidth / m_nUserUnit)
            + " "
            + OString::number(m_nPageHeight / m_nUserUnit)
            + "]" );
        if (m_nUserUnit > 1)
        {
            aLine.append("\n/UserUnit " + OString::number(m_nUserUnit));
        }
    }
    switch( m_eOrientation )
    {
        case PDFWriter::Orientation::Portrait: aLine.append( "/Rotate 0\n" );break;
        case PDFWriter::Orientation::Inherit:  break;
    }
    int nAnnots = m_aAnnotations.size();
    if( nAnnots > 0 )
    {
        aLine.append( "/Annots[\n" );
        for( int i = 0; i < nAnnots; i++ )
        {
            aLine.append( OString::number(m_aAnnotations[i])
                + " 0 R" );
            aLine.append( ((i+1)%15) ? " " : "\n" );
        }
        aLine.append( "]\n" );
        if (PDFWriter::PDFVersion::PDF_1_5 <= m_pWriter->m_aContext.Version)
        {
            // ISO 14289-1:2014, Clause: 7.18.3
            aLine.append( "/Tabs/S\n" );
        }
    }
    if( !m_aMCIDParents.empty() )
    {
        OStringBuffer aStructParents( 1024 );
        aStructParents.append( "[ " );
        int nParents = m_aMCIDParents.size();
        for( int i = 0; i < nParents; i++ )
        {
            aStructParents.append( OString::number(m_aMCIDParents[i])
                + " 0 R" );
            aStructParents.append( ((i%10) == 9) ? "\n" : " " );
        }
        aStructParents.append( "]" );
        m_pWriter->m_aStructParentTree.push_back( aStructParents.makeStringAndClear() );
 
        aLine.append( "/StructParents "
            + OString::number( sal_Int32(m_pWriter->m_aStructParentTree.size()-1) )
            + "\n" );
    }
    if( m_eTransition != PDFWriter::PageTransition::Regular && m_nTransTime > 0 )
    {
        // transition duration
        aLine.append( "/Trans<</D " );
        appendDouble( static_cast<double>(m_nTransTime)/1000.0, aLine, 3 );
        aLine.append( "\n" );
        const char *pStyle = nullptr, *pDm = nullptr, *pM = nullptr, *pDi = nullptr;
        switch( m_eTransition )
        {
            case PDFWriter::PageTransition::SplitHorizontalInward:
                pStyle = "Split"; pDm = "H"; pM = "I"; break;
            case PDFWriter::PageTransition::SplitHorizontalOutward:
                pStyle = "Split"; pDm = "H"; pM = "O"; break;
            case PDFWriter::PageTransition::SplitVerticalInward:
                pStyle = "Split"; pDm = "V"; pM = "I"; break;
            case PDFWriter::PageTransition::SplitVerticalOutward:
                pStyle = "Split"; pDm = "V"; pM = "O"; break;
            case PDFWriter::PageTransition::BlindsHorizontal:
                pStyle = "Blinds"; pDm = "H"; break;
            case PDFWriter::PageTransition::BlindsVertical:
                pStyle = "Blinds"; pDm = "V"; break;
            case PDFWriter::PageTransition::BoxInward:
                pStyle = "Box"; pM = "I"; break;
            case PDFWriter::PageTransition::BoxOutward:
                pStyle = "Box"; pM = "O"; break;
            case PDFWriter::PageTransition::WipeLeftToRight:
                pStyle = "Wipe"; pDi = "0"; break;
            case PDFWriter::PageTransition::WipeBottomToTop:
                pStyle = "Wipe"; pDi = "90"; break;
            case PDFWriter::PageTransition::WipeRightToLeft:
                pStyle = "Wipe"; pDi = "180"; break;
            case PDFWriter::PageTransition::WipeTopToBottom:
                pStyle = "Wipe"; pDi = "270"; break;
            case PDFWriter::PageTransition::Dissolve:
                pStyle = "Dissolve"; break;
            case PDFWriter::PageTransition::Regular:
                break;
        }
        // transition style
        if( pStyle )
        {
            aLine.append( OString::Concat("/S/") + pStyle + "\n" );
        }
        if( pDm )
        {
            aLine.append( OString::Concat("/Dm/") + pDm + "\n" );
        }
        if( pM )
        {
            aLine.append( OString::Concat("/M/") + pM + "\n" );
        }
        if( pDi  )
        {
            aLine.append( OString::Concat("/Di ") + pDi + "\n" );
        }
        aLine.append( ">>\n" );
    }
 
    aLine.append( "/Contents" );
    unsigned int nStreamObjects = m_aStreamObjects.size();
    if( nStreamObjects > 1 )
        aLine.append( '[' );
    for(sal_Int32 i : m_aStreamObjects)
    {
        aLine.append( " " + OString::number( i ) + " 0 R" );
    }
    if( nStreamObjects > 1 )
        aLine.append( ']' );
    aLine.append( ">>\nendobj\n\n" );
    return m_pWriter->writeBuffer( aLine );
}
 
void PDFPage::appendPoint( const Point& rPoint, OStringBuffer& rBuffer ) const
{
    Point aPoint( lcl_convert( m_pWriter->m_aGraphicsStack.front().m_aMapMode,
                               m_pWriter->m_aMapMode,
                               m_pWriter,
                               rPoint ) );
 
    sal_Int32 nValue    = aPoint.X();
 
    appendFixedInt( nValue, rBuffer );
 
    rBuffer.append( ' ' );
 
    nValue      = pointToPixel(getHeight()) - aPoint.Y();
 
    appendFixedInt( nValue, rBuffer );
}
 
void PDFPage::appendPixelPoint( const basegfx::B2DPoint& rPoint, OStringBuffer& rBuffer ) const
{
    double fValue   = pixelToPoint(rPoint.getX());
 
    appendDouble( fValue, rBuffer, nLog10Divisor );
    rBuffer.append( ' ' );
    fValue      = getHeight() - pixelToPoint(rPoint.getY());
    appendDouble( fValue, rBuffer, nLog10Divisor );
}
 
void PDFPage::appendRect( const tools::Rectangle& rRect, OStringBuffer& rBuffer ) const
{
    appendPoint( rRect.BottomLeft() + Point( 0, 1 ), rBuffer );
    rBuffer.append( ' ' );
    appendMappedLength( static_cast<sal_Int32>(rRect.GetWidth()), rBuffer, false );
    rBuffer.append( ' ' );
    appendMappedLength( static_cast<sal_Int32>(rRect.GetHeight()), rBuffer );
    rBuffer.append( " re" );
}
 
void PDFPage::convertRect( tools::Rectangle& rRect ) const
{
    Point aLL = lcl_convert( m_pWriter->m_aGraphicsStack.front().m_aMapMode,
                             m_pWriter->m_aMapMode,
                             m_pWriter,
                             rRect.BottomLeft() + Point( 0, 1 )
                             );
    Size aSize = lcl_convert( m_pWriter->m_aGraphicsStack.front().m_aMapMode,
                              m_pWriter->m_aMapMode,
                              m_pWriter,
                              rRect.GetSize() );
    rRect.SetLeft( aLL.X() );
    rRect.SetRight( aLL.X() + aSize.Width() );
    rRect.SetTop( pointToPixel(getHeight()) - aLL.Y() );
    rRect.SetBottom( rRect.Top() + aSize.Height() );
}
 
void PDFPage::appendPolygon( const tools::Polygon& rPoly, OStringBuffer& rBuffer, bool bClose ) const
{
    sal_uInt16 nPoints = rPoly.GetSize();
    /*
     *  #108582# applications do weird things
     */
    sal_uInt32 nBufLen = rBuffer.getLength();
    if( nPoints <= 0 )
        return;
 
    const PolyFlags* pFlagArray = rPoly.GetConstFlagAry();
    appendPoint( rPoly[0], rBuffer );
    rBuffer.append( " m\n" );
    for( sal_uInt16 i = 1; i < nPoints; i++ )
    {
        if( pFlagArray && pFlagArray[i] == PolyFlags::Control && nPoints-i > 2 )
        {
            // bezier
            SAL_WARN_IF( pFlagArray[i+1] != PolyFlags::Control || pFlagArray[i+2] == PolyFlags::Control, "vcl.pdfwriter", "unexpected sequence of control points" );
            appendPoint( rPoly[i], rBuffer );
            rBuffer.append( " " );
            appendPoint( rPoly[i+1], rBuffer );
            rBuffer.append( " " );
            appendPoint( rPoly[i+2], rBuffer );
            rBuffer.append( " c" );
            i += 2; // add additionally consumed points
        }
        else
        {
            // line
            appendPoint( rPoly[i], rBuffer );
            rBuffer.append( " l" );
        }
        if( (rBuffer.getLength() - nBufLen) > 65 )
        {
            rBuffer.append( "\n" );
            nBufLen = rBuffer.getLength();
        }
        else
            rBuffer.append( " " );
    }
    if( bClose )
        rBuffer.append( "h\n" );
}
 
void PDFPage::appendPolygon( const basegfx::B2DPolygon& rPoly, OStringBuffer& rBuffer ) const
{
    basegfx::B2DPolygon aPoly( lcl_convert( m_pWriter->m_aGraphicsStack.front().m_aMapMode,
                                            m_pWriter->m_aMapMode,
                                            m_pWriter,
                                            rPoly ) );
 
    if( basegfx::utils::isRectangle( aPoly ) )
    {
        basegfx::B2DRange aRange( aPoly.getB2DRange() );
        basegfx::B2DPoint aBL( aRange.getMinX(), aRange.getMaxY() );
        appendPixelPoint( aBL, rBuffer );
        rBuffer.append( ' ' );
        appendMappedLength( aRange.getWidth(), rBuffer, false, nLog10Divisor );
        rBuffer.append( ' ' );
        appendMappedLength( aRange.getHeight(), rBuffer, true, nLog10Divisor );
        rBuffer.append( " re\n" );
        return;
    }
    sal_uInt32 nPoints = aPoly.count();
    if( nPoints <= 0 )
        return;
 
    sal_uInt32 nBufLen = rBuffer.getLength();
    basegfx::B2DPoint aLastPoint( aPoly.getB2DPoint( 0 ) );
    appendPixelPoint( aLastPoint, rBuffer );
    rBuffer.append( " m\n" );
    for( sal_uInt32 i = 1; i <= nPoints; i++ )
    {
        if( i != nPoints || aPoly.isClosed() )
        {
            sal_uInt32 nCurPoint  = i % nPoints;
            sal_uInt32 nLastPoint = i-1;
            basegfx::B2DPoint aPoint( aPoly.getB2DPoint( nCurPoint ) );
            if( aPoly.isNextControlPointUsed( nLastPoint ) &&
                aPoly.isPrevControlPointUsed( nCurPoint ) )
            {
                appendPixelPoint( aPoly.getNextControlPoint( nLastPoint ), rBuffer );
                rBuffer.append( ' ' );
                appendPixelPoint( aPoly.getPrevControlPoint( nCurPoint ), rBuffer );
                rBuffer.append( ' ' );
                appendPixelPoint( aPoint, rBuffer );
                rBuffer.append( " c" );
            }
            else if( aPoly.isNextControlPointUsed( nLastPoint ) )
            {
                appendPixelPoint( aPoly.getNextControlPoint( nLastPoint ), rBuffer );
                rBuffer.append( ' ' );
                appendPixelPoint( aPoint, rBuffer );
                rBuffer.append( " y" );
            }
            else if( aPoly.isPrevControlPointUsed( nCurPoint ) )
            {
                appendPixelPoint( aPoly.getPrevControlPoint( nCurPoint ), rBuffer );
                rBuffer.append( ' ' );
                appendPixelPoint( aPoint, rBuffer );
                rBuffer.append( " v" );
            }
            else
            {
                appendPixelPoint( aPoint, rBuffer );
                rBuffer.append( " l" );
            }
            if( (rBuffer.getLength() - nBufLen) > 65 )
            {
                rBuffer.append( "\n" );
                nBufLen = rBuffer.getLength();
            }
            else
                rBuffer.append( " " );
        }
    }
    rBuffer.append( "h\n" );
}
 
void PDFPage::appendPolyPolygon( const tools::PolyPolygon& rPolyPoly, OStringBuffer& rBuffer ) const
{
    sal_uInt16 nPolygons = rPolyPoly.Count();
    for( sal_uInt16 n = 0; n < nPolygons; n++ )
        appendPolygon( rPolyPoly[n], rBuffer );
}
 
void PDFPage::appendPolyPolygon( const basegfx::B2DPolyPolygon& rPolyPoly, OStringBuffer& rBuffer ) const
{
    for(auto const& rPolygon : rPolyPoly)
        appendPolygon( rPolygon, rBuffer );
}
 
void PDFPage::appendMappedLength( sal_Int32 nLength, OStringBuffer& rBuffer, bool bVertical, sal_Int32* pOutLength ) const
{
    sal_Int32 nValue = nLength;
    if ( nLength < 0 )
    {
        rBuffer.append( '-' );
        nValue = -nLength;
    }
    Size aSize( lcl_convert( m_pWriter->m_aGraphicsStack.front().m_aMapMode,
                             m_pWriter->m_aMapMode,
                             m_pWriter,
                             Size( nValue, nValue ) ) );
    nValue = bVertical ? aSize.Height() : aSize.Width();
    if( pOutLength )
        *pOutLength = ((nLength < 0 ) ? -nValue : nValue);
 
    appendFixedInt( nValue, rBuffer );
}
 
void PDFPage::appendMappedLength( double fLength, OStringBuffer& rBuffer, bool bVertical, sal_Int32 nPrecision ) const
{
    Size aSize( lcl_convert( m_pWriter->m_aGraphicsStack.front().m_aMapMode,
                             m_pWriter->m_aMapMode,
                             m_pWriter,
                             Size( 1000, 1000 ) ) );
    fLength *= pixelToPoint(static_cast<double>(bVertical ? aSize.Height() : aSize.Width()) / 1000.0);
    appendDouble( fLength, rBuffer, nPrecision );
}
 
bool PDFPage::appendLineInfo( const LineInfo& rInfo, OStringBuffer& rBuffer ) const
{
    if(LineStyle::Dash == rInfo.GetStyle() && rInfo.GetDashLen() != rInfo.GetDotLen())
    {
        // dashed and non-degraded case, check for implementation limits of dash array
        // in PDF reader apps (e.g. acroread)
        if(2 * (rInfo.GetDashCount() + rInfo.GetDotCount()) > 10)
        {
            return false;
        }
    }
 
    if(basegfx::B2DLineJoin::NONE != rInfo.GetLineJoin())
    {
        // LineJoin used, ExtLineInfo required
        return false;
    }
 
    if(css::drawing::LineCap_BUTT != rInfo.GetLineCap())
    {
        // LineCap used, ExtLineInfo required
        return false;
    }
 
    if( rInfo.GetStyle() == LineStyle::Dash )
    {
        rBuffer.append( "[ " );
        if( rInfo.GetDashLen() == rInfo.GetDotLen() ) // degraded case
        {
            appendMappedLength( rInfo.GetDashLen(), rBuffer );
            rBuffer.append( ' ' );
            appendMappedLength( rInfo.GetDistance(), rBuffer );
            rBuffer.append( ' ' );
        }
        else
        {
            for( int n = 0; n < rInfo.GetDashCount(); n++ )
            {
                appendMappedLength( rInfo.GetDashLen(), rBuffer );
                rBuffer.append( ' ' );
                appendMappedLength( rInfo.GetDistance(), rBuffer );
                rBuffer.append( ' ' );
            }
            for( int m = 0; m < rInfo.GetDotCount(); m++ )
            {
                appendMappedLength( rInfo.GetDotLen(), rBuffer );
                rBuffer.append( ' ' );
                appendMappedLength( rInfo.GetDistance(), rBuffer );
                rBuffer.append( ' ' );
            }
        }
        rBuffer.append( "] 0 d\n" );
    }
 
    if( rInfo.GetWidth() > 1 )
    {
        appendMappedLength( rInfo.GetWidth(), rBuffer );
        rBuffer.append( " w\n" );
    }
    else if( rInfo.GetWidth() == 0 )
    {
        // "pixel" line
        appendDouble( 72.0/double(m_pWriter->GetDPIX()), rBuffer );
        rBuffer.append( " w\n" );
    }
 
    return true;
}
 
void PDFPage::appendWaveLine( sal_Int32 nWidth, sal_Int32 nY, sal_Int32 nDelta, OStringBuffer& rBuffer ) const
{
    if( nWidth <= 0 )
        return;
    if( nDelta < 1 )
        nDelta = 1;
 
    rBuffer.append( "0 " );
    appendMappedLength( nY, rBuffer );
    rBuffer.append( " m\n" );
    for( sal_Int32 n = 0; n < nWidth; )
    {
        n += nDelta;
        appendMappedLength( n, rBuffer, false );
        rBuffer.append( ' ' );
        appendMappedLength( nDelta+nY, rBuffer );
        rBuffer.append( ' ' );
        n += nDelta;
        appendMappedLength( n, rBuffer, false );
        rBuffer.append( ' ' );
        appendMappedLength( nY, rBuffer );
        rBuffer.append( " v " );
        if( n < nWidth )
        {
            n += nDelta;
            appendMappedLength( n, rBuffer, false );
            rBuffer.append( ' ' );
            appendMappedLength( nY-nDelta, rBuffer );
            rBuffer.append( ' ' );
            n += nDelta;
            appendMappedLength( n, rBuffer, false );
            rBuffer.append( ' ' );
            appendMappedLength( nY, rBuffer );
            rBuffer.append( " v\n" );
        }
    }
    rBuffer.append( "S\n" );
}
 
void PDFPage::appendMatrix3(Matrix3 const & rMatrix, OStringBuffer& rBuffer)
{
    appendDouble(rMatrix.get(0), rBuffer);
    rBuffer.append(' ');
    appendDouble(rMatrix.get(1), rBuffer);
    rBuffer.append(' ');
    appendDouble(rMatrix.get(2), rBuffer);
    rBuffer.append(' ');
    appendDouble(rMatrix.get(3), rBuffer);
    rBuffer.append(' ');
    appendPoint(Point(tools::Long(rMatrix.get(4)), tools::Long(rMatrix.get(5))), rBuffer);
}
 
double PDFPage::getHeight() const
{
    double fRet = m_nPageHeight ? m_nPageHeight : vcl::pdf::g_nInheritedPageHeight;
 
    if (m_nUserUnit > 1)
    {
        fRet /= m_nUserUnit;
    }
 
    return fRet;
}
 
PDFWriterImpl::PDFWriterImpl( const PDFWriter::PDFWriterContext& rContext,
                               const css::uno::Reference< css::beans::XMaterialHolder >& xEnc,
                               PDFWriter& i_rOuterFace)
        : VirtualDevice(Application::GetDefaultDevice(), DeviceFormat::WITHOUT_ALPHA, OUTDEV_PDF),
        m_aMapMode( MapUnit::MapPoint, Point(), Fraction( 1, pointToPixel(1) ), Fraction( 1, pointToPixel(1) ) ),
        m_aWidgetStyleSettings(Application::GetSettings().GetStyleSettings()),
        m_nCurrentStructElement( 0 ),
        m_bEmitStructure( true ),
        m_nNextFID( 1 ),
        m_aPDFBmpCache(utl::ConfigManager::IsFuzzing() ? 15 :
            officecfg::Office::Common::VCL::PDFExportImageCacheSize::get()),
        m_nCurrentPage( -1 ),
        m_nCatalogObject(0),
        m_nSignatureObject( -1 ),
        m_nSignatureContentOffset( 0 ),
        m_nSignatureLastByteRangeNoOffset( 0 ),
        m_nResourceDict( -1 ),
        m_nFontDictObject( -1 ),
        m_aContext(rContext),
        m_aFile(m_aContext.URL),
        m_bOpen(false),
        m_DocDigest(::comphelper::HashType::MD5),
        m_aCipher( nullptr ),
        m_nKeyLength(0),
        m_nRC4KeyLength(0),
        m_bEncryptThisStream( false ),
        m_nAccessPermissions(0),
        m_bIsPDF_A1( false ),
        m_bIsPDF_A2( false ),
        m_bIsPDF_UA( false ),
        m_bIsPDF_A3( false ),
        m_rOuterFace( i_rOuterFace )
{
    m_aStructure.emplace_back( );
    m_aStructure[0].m_nOwnElement       = 0;
    m_aStructure[0].m_nParentElement    = 0;
    //m_StructElementStack.push(0);
 
    Font aFont;
    aFont.SetFamilyName( "Times" );
    aFont.SetFontSize( Size( 0, 12 ) );
 
    // tdf#150786 use the same settings for widgets regardless of theme
    m_aWidgetStyleSettings.SetStandardStyles();
 
    GraphicsState aState;
    aState.m_aMapMode       = m_aMapMode;
    aState.m_aFont          = aFont;
    m_aGraphicsStack.push_front( aState );
 
    osl::File::RC aError = m_aFile.open(osl_File_OpenFlag_Write | osl_File_OpenFlag_Create);
    if (aError != osl::File::E_None)
    {
        if (aError == osl::File::E_EXIST)
        {
            aError = m_aFile.open(osl_File_OpenFlag_Write);
            if (aError == osl::File::E_None)
                aError = m_aFile.setSize(0);
        }
    }
    if (aError != osl::File::E_None)
        return;
 
    m_bOpen = true;
 
    // setup DocInfo
    setupDocInfo();
 
    /* prepare the cypher engine, can be done in CTOR, free in DTOR */
    m_aCipher = rtl_cipher_createARCFOUR( rtl_Cipher_ModeStream );
 
    if( xEnc.is() )
        prepareEncryption( xEnc );
 
    if( m_aContext.Encryption.Encrypt() )
    {
        // sanity check
        if( m_aContext.Encryption.OValue.size() != ENCRYPTED_PWD_SIZE ||
            m_aContext.Encryption.UValue.size() != ENCRYPTED_PWD_SIZE ||
            m_aContext.Encryption.EncryptionKey.size() != MAXIMUM_RC4_KEY_LENGTH
           )
        {
            // the field lengths are invalid ? This was not setup by initEncryption.
            // do not encrypt after all
            m_aContext.Encryption.OValue.clear();
            m_aContext.Encryption.UValue.clear();
            OSL_ENSURE( false, "encryption data failed sanity check, encryption disabled" );
        }
        else // setup key lengths
            m_nAccessPermissions = computeAccessPermissions( m_aContext.Encryption, m_nKeyLength, m_nRC4KeyLength );
    }
 
    // write header
    OStringBuffer aBuffer( 20 );
    aBuffer.append( "%PDF-" );
    switch( m_aContext.Version )
    {
        case PDFWriter::PDFVersion::PDF_A_1:
        case PDFWriter::PDFVersion::PDF_1_4: aBuffer.append( "1.4" );break;
        case PDFWriter::PDFVersion::PDF_1_5: aBuffer.append( "1.5" );break;
        case PDFWriter::PDFVersion::PDF_1_6: aBuffer.append( "1.6" );break;
        default:
        case PDFWriter::PDFVersion::PDF_A_2:
        case PDFWriter::PDFVersion::PDF_A_3:
        case PDFWriter::PDFVersion::PDF_1_7: aBuffer.append( "1.7" );break;
    }
    // append something binary as comment (suggested in PDF Reference)
    aBuffer.append( "\n%\303\244\303\274\303\266\303\237\n" );
    if( !writeBuffer( aBuffer ) )
    {
        m_aFile.close();
        m_bOpen = false;
        return;
    }
 
    // insert outline root
    m_aOutline.emplace_back( );
 
    m_bIsPDF_A1 = (m_aContext.Version == PDFWriter::PDFVersion::PDF_A_1);
    if( m_bIsPDF_A1 )
        m_aContext.Version = PDFWriter::PDFVersion::PDF_1_4; //meaning we need PDF 1.4, PDF/A flavour
 
    m_bIsPDF_A2 = (m_aContext.Version == PDFWriter::PDFVersion::PDF_A_2);
    if( m_bIsPDF_A2 )
        m_aContext.Version = PDFWriter::PDFVersion::PDF_1_7;
 
    m_bIsPDF_A3 = (m_aContext.Version == PDFWriter::PDFVersion::PDF_A_3);
    if( m_bIsPDF_A3 )
        m_aContext.Version = PDFWriter::PDFVersion::PDF_1_7;
 
    if (m_aContext.UniversalAccessibilityCompliance)
    {
        m_bIsPDF_UA = true;
        m_aContext.Tagged = true;
    }
 
    if( m_aContext.DPIx == 0 || m_aContext.DPIy == 0 )
        SetReferenceDevice( VirtualDevice::RefDevMode::PDF1 );
    else
        SetReferenceDevice( m_aContext.DPIx, m_aContext.DPIy );
 
    SetOutputSizePixel( Size( 640, 480 ) );
    SetMapMode(MapMode(MapUnit::MapMM));
}
 
PDFWriterImpl::~PDFWriterImpl()
{
    disposeOnce();
}
 
void PDFWriterImpl::dispose()
{
    if( m_aCipher )
        rtl_cipher_destroyARCFOUR( m_aCipher );
    m_aPages.clear();
    VirtualDevice::dispose();
}
 
bool PDFWriterImpl::ImplNewFont() const
{
    const ImplSVData* pSVData = ImplGetSVData();
 
    if( mxFontCollection == pSVData->maGDIData.mxScreenFontList
        ||  mxFontCache == pSVData->maGDIData.mxScreenFontCache )
    {
        const_cast<vcl::PDFWriterImpl&>(*this).ImplUpdateFontData();
    }
 
    return OutputDevice::ImplNewFont();
}
 
void PDFWriterImpl::setupDocInfo()
{
    std::vector< sal_uInt8 > aId;
    m_aCreationDateString = PDFWriter::GetDateTime();
    computeDocumentIdentifier( aId, m_aContext.DocumentInfo, m_aCreationDateString, m_aCreationMetaDateString );
    if( m_aContext.Encryption.DocumentIdentifier.empty() )
        m_aContext.Encryption.DocumentIdentifier = aId;
}
 
OString PDFWriter::GetDateTime()
{
    OStringBuffer aRet;
 
    TimeValue aTVal, aGMT;
    oslDateTime aDT;
    osl_getSystemTime(&aGMT);
    osl_getLocalTimeFromSystemTime(&aGMT, &aTVal);
    osl_getDateTimeFromTimeValue(&aTVal, &aDT);
 
    sal_Int32 nDelta = aTVal.Seconds-aGMT.Seconds;
 
    appendPdfTimeDate(aRet, aDT.Year, aDT.Month, aDT.Day, aDT.Hours, aDT.Minutes, aDT.Seconds, nDelta);
 
    aRet.append("'");
    return aRet.makeStringAndClear();
}
 
void PDFWriterImpl::computeDocumentIdentifier( std::vector< sal_uInt8 >& o_rIdentifier,
                                               const vcl::PDFWriter::PDFDocInfo& i_rDocInfo,
                                               const OString& i_rCString1,
                                               OString& o_rCString2
                                               )
{
    o_rIdentifier.clear();
 
    //build the document id
    OString aInfoValuesOut;
    OStringBuffer aID( 1024 );
    if( !i_rDocInfo.Title.isEmpty() )
        PDFWriter::AppendUnicodeTextString(i_rDocInfo.Title, aID);
    if( !i_rDocInfo.Author.isEmpty() )
        PDFWriter::AppendUnicodeTextString(i_rDocInfo.Author, aID);
    if( !i_rDocInfo.Subject.isEmpty() )
        PDFWriter::AppendUnicodeTextString(i_rDocInfo.Subject, aID);
    if( !i_rDocInfo.Keywords.isEmpty() )
        PDFWriter::AppendUnicodeTextString(i_rDocInfo.Keywords, aID);
    if( !i_rDocInfo.Creator.isEmpty() )
        PDFWriter::AppendUnicodeTextString(i_rDocInfo.Creator, aID);
    if( !i_rDocInfo.Producer.isEmpty() )
        PDFWriter::AppendUnicodeTextString(i_rDocInfo.Producer, aID);
 
    TimeValue aTVal, aGMT;
    oslDateTime aDT;
    osl_getSystemTime( &aGMT );
    osl_getLocalTimeFromSystemTime( &aGMT, &aTVal );
    osl_getDateTimeFromTimeValue( &aTVal, &aDT );
    OStringBuffer aCreationMetaDateString(64);
 
    // i59651: we fill the Metadata date string as well, if PDF/A is requested
    // according to ISO 19005-1:2005 6.7.3 the date is corrected for
    // local time zone offset UTC only, whereas Acrobat 8 seems
    // to use the localtime notation only
    // according to a recommendation in XMP Specification (Jan 2004, page 75)
    // the Acrobat way seems the right approach
    aCreationMetaDateString.append(
        OStringChar(static_cast<char>('0' + ((aDT.Year/1000)%10)) )
        + OStringChar(static_cast<char>('0' + ((aDT.Year/100)%10)) )
        + OStringChar(static_cast<char>('0' + ((aDT.Year/10)%10)) )
        + OStringChar(static_cast<char>('0' + ((aDT.Year)%10)) )
        + "-"
        + OStringChar(static_cast<char>('0' + ((aDT.Month/10)%10)) )
        + OStringChar(static_cast<char>('0' + ((aDT.Month)%10)) )
        + "-"
        + OStringChar(static_cast<char>('0' + ((aDT.Day/10)%10)) )
        + OStringChar(static_cast<char>('0' + ((aDT.Day)%10)) )
        + "T"
        + OStringChar(static_cast<char>('0' + ((aDT.Hours/10)%10)) )
        + OStringChar(static_cast<char>('0' + ((aDT.Hours)%10)) )
        + ":"
        + OStringChar(static_cast<char>('0' + ((aDT.Minutes/10)%10)) )
        + OStringChar(static_cast<char>('0' + ((aDT.Minutes)%10)) )
        + ":"
        + OStringChar(static_cast<char>('0' + ((aDT.Seconds/10)%10)) )
        + OStringChar(static_cast<char>('0' + ((aDT.Seconds)%10)) ));
 
    sal_uInt32 nDelta = 0;
    if( aGMT.Seconds > aTVal.Seconds )
    {
        nDelta = aGMT.Seconds-aTVal.Seconds;
        aCreationMetaDateString.append( "-" );
    }
    else if( aGMT.Seconds < aTVal.Seconds )
    {
        nDelta = aTVal.Seconds-aGMT.Seconds;
        aCreationMetaDateString.append( "+" );
    }
    else
    {
        aCreationMetaDateString.append( "Z" );
 
    }
    if( nDelta )
    {
        aCreationMetaDateString.append(
            OStringChar(static_cast<char>('0' + ((nDelta/36000)%10)) )
            + OStringChar(static_cast<char>('0' + ((nDelta/3600)%10)) )
            + ":"
            + OStringChar(static_cast<char>('0' + ((nDelta/600)%6)) )
            + OStringChar(static_cast<char>('0' + ((nDelta/60)%10)) ));
    }
    aID.append( i_rCString1.getStr(), i_rCString1.getLength() );
 
    aInfoValuesOut = aID.makeStringAndClear();
    o_rCString2 = aCreationMetaDateString.makeStringAndClear();
 
    ::comphelper::Hash aDigest(::comphelper::HashType::MD5);
    aDigest.update(reinterpret_cast<unsigned char const*>(&aGMT), sizeof(aGMT));
    aDigest.update(reinterpret_cast<unsigned char const*>(aInfoValuesOut.getStr()), aInfoValuesOut.getLength());
    //the binary form of the doc id is needed for encryption stuff
    o_rIdentifier = aDigest.finalize();
}
 
/* i12626 methods */
/*
check if the Unicode string must be encrypted or not, perform the requested task,
append the string as unicode hex, encrypted if needed
 */
inline void PDFWriterImpl::appendUnicodeTextStringEncrypt( const OUString& rInString, const sal_Int32 nInObjectNumber, OStringBuffer& rOutBuffer )
{
    rOutBuffer.append( "<" );
    if( m_aContext.Encryption.Encrypt() )
    {
        const sal_Unicode* pStr = rInString.getStr();
        sal_Int32 nLen = rInString.getLength();
        //prepare a unicode string, encrypt it
        enableStringEncryption( nInObjectNumber );
        sal_uInt8 *pCopy = m_vEncryptionBuffer.data();
        sal_Int32 nChars = 2 + (nLen * 2);
        m_vEncryptionBuffer.resize(nChars);
        *pCopy++ = 0xFE;
        *pCopy++ = 0xFF;
        // we need to prepare a byte stream from the unicode string buffer
        for( int i = 0; i < nLen; i++ )
        {
            sal_Unicode aUnChar = pStr[i];
            *pCopy++ = static_cast<sal_uInt8>( aUnChar >> 8 );
            *pCopy++ = static_cast<sal_uInt8>( aUnChar & 255 );
        }
        //encrypt in place
        rtl_cipher_encodeARCFOUR( m_aCipher, m_vEncryptionBuffer.data(), nChars, m_vEncryptionBuffer.data(), nChars );
        //now append, hexadecimal (appendHex), the encrypted result
        for(int i = 0; i < nChars; i++)
            appendHex( m_vEncryptionBuffer[i], rOutBuffer );
    }
    else
        PDFWriter::AppendUnicodeTextString(rInString, rOutBuffer);
    rOutBuffer.append( ">" );
}
 
inline void PDFWriterImpl::appendLiteralStringEncrypt( std::string_view rInString, const sal_Int32 nInObjectNumber, OStringBuffer& rOutBuffer )
{
    rOutBuffer.append( "(" );
    sal_Int32 nChars = rInString.size();
    //check for encryption, if ok, encrypt the string, then convert with appndLiteralString
    if( m_aContext.Encryption.Encrypt() )
    {
        m_vEncryptionBuffer.resize(nChars);
        //encrypt the string in a buffer, then append it
        enableStringEncryption( nInObjectNumber );
        rtl_cipher_encodeARCFOUR( m_aCipher, rInString.data(), nChars, m_vEncryptionBuffer.data(), nChars );
        appendLiteralString( reinterpret_cast<char*>(m_vEncryptionBuffer.data()), nChars, rOutBuffer );
    }
    else
        appendLiteralString( rInString.data(), nChars , rOutBuffer );
    rOutBuffer.append( ")" );
}
 
void PDFWriterImpl::appendLiteralStringEncrypt( std::u16string_view rInString, const sal_Int32 nInObjectNumber, OStringBuffer& rOutBuffer, rtl_TextEncoding nEnc )
{
    OString aBufferString( OUStringToOString( rInString, nEnc ) );
    sal_Int32 nLen = aBufferString.getLength();
    OStringBuffer aBuf( nLen );
    const char* pT = aBufferString.getStr();
 
    for( sal_Int32 i = 0; i < nLen; i++, pT++ )
    {
        if( (*pT & 0x80) == 0 )
            aBuf.append( *pT );
        else
        {
            aBuf.append( '<' );
            appendHex( *pT, aBuf );
            aBuf.append( '>' );
        }
    }
    aBufferString = aBuf.makeStringAndClear();
    appendLiteralStringEncrypt( aBufferString, nInObjectNumber, rOutBuffer);
}
 
/* end i12626 methods */
 
void PDFWriterImpl::emitComment( const char* pComment )
{
    OString aLine = OString::Concat("% ") + pComment + "\n";
    writeBuffer( aLine );
}
 
bool PDFWriterImpl::compressStream( SvMemoryStream* pStream )
{
    if (!g_bDebugDisableCompression)
    {
        sal_uInt64 nEndPos = pStream->TellEnd();
        pStream->Seek( STREAM_SEEK_TO_BEGIN );
        ZCodec aCodec( 0x4000, 0x4000 );
        SvMemoryStream aStream;
        aCodec.BeginCompression();
        aCodec.Write( aStream, static_cast<const sal_uInt8*>(pStream->GetData()), nEndPos );
        aCodec.EndCompression();
        nEndPos = aStream.Tell();
        pStream->Seek( STREAM_SEEK_TO_BEGIN );
        aStream.Seek( STREAM_SEEK_TO_BEGIN );
        pStream->SetStreamSize( nEndPos );
        pStream->WriteBytes( aStream.GetData(), nEndPos );
        return true;
    }
    else
        return false;
}
 
void PDFWriterImpl::beginCompression()
{
    if (!g_bDebugDisableCompression)
    {
        m_pCodec = std::make_unique<ZCodec>( 0x4000, 0x4000 );
        m_pMemStream = std::make_unique<SvMemoryStream>();
        m_pCodec->BeginCompression();
    }
}
 
void PDFWriterImpl::endCompression()
{
    if (!g_bDebugDisableCompression && m_pCodec)
    {
        m_pCodec->EndCompression();
        m_pCodec.reset();
        sal_uInt64 nLen = m_pMemStream->Tell();
        m_pMemStream->Seek( 0 );
        writeBufferBytes( m_pMemStream->GetData(), nLen );
        m_pMemStream.reset();
    }
}
 
bool PDFWriterImpl::writeBufferBytes( const void* pBuffer, sal_uInt64 nBytes )
{
    if( ! m_bOpen ) // we are already down the drain
        return false;
 
    if( ! nBytes ) // huh ?
        return true;
 
    if( !m_aOutputStreams.empty() )
    {
        m_aOutputStreams.front().m_pStream->Seek( STREAM_SEEK_TO_END );
        m_aOutputStreams.front().m_pStream->WriteBytes(
                pBuffer, sal::static_int_cast<std::size_t>(nBytes));
        return true;
    }
 
    sal_uInt64 nWritten;
    if( m_pCodec )
    {
        m_pCodec->Write( *m_pMemStream, static_cast<const sal_uInt8*>(pBuffer), static_cast<sal_uLong>(nBytes) );
        nWritten = nBytes;
    }
    else
    {
        bool  buffOK = true;
        if( m_bEncryptThisStream )
        {
            /* implement the encryption part of the PDF spec encryption algorithm 3.1 */
            m_vEncryptionBuffer.resize(nBytes);
            if( buffOK )
                rtl_cipher_encodeARCFOUR( m_aCipher,
                                          pBuffer, static_cast<sal_Size>(nBytes),
                                          m_vEncryptionBuffer.data(), static_cast<sal_Size>(nBytes) );
        }
 
        const void* pWriteBuffer = ( m_bEncryptThisStream && buffOK ) ? m_vEncryptionBuffer.data()  : pBuffer;
        m_DocDigest.update(static_cast<unsigned char const*>(pWriteBuffer), static_cast<sal_uInt32>(nBytes));
 
        if (m_aFile.write(pWriteBuffer, nBytes, nWritten) != osl::File::E_None)
            nWritten = 0;
 
        if( nWritten != nBytes )
        {
            m_aFile.close();
            m_bOpen = false;
        }
    }
 
    return nWritten == nBytes;
}
 
void PDFWriterImpl::newPage( double nPageWidth, double nPageHeight, PDFWriter::Orientation eOrientation )
{
    endPage();
    m_nCurrentPage = m_aPages.size();
    m_aPages.emplace_back(this, nPageWidth, nPageHeight, eOrientation );
 
    sal_Int32 nUserUnit = m_aPages.back().m_nUserUnit;
    if (nUserUnit > 1)
    {
        m_aMapMode = MapMode(MapUnit::MapPoint, Point(), Fraction(nUserUnit, pointToPixel(1)),
                             Fraction(nUserUnit, pointToPixel(1)));
    }
 
    m_aPages.back().beginStream();
 
    // setup global graphics state
    // linewidth is "1 pixel" by default
    OStringBuffer aBuf( 16 );
    appendDouble( 72.0/double(GetDPIX()), aBuf );
    aBuf.append( " w\n" );
    writeBuffer( aBuf );
}
 
void PDFWriterImpl::endPage()
{
    if( m_aPages.empty() )
        return;
 
    // close eventual MC sequence
    endStructureElementMCSeq();
 
    // sanity check
    if( !m_aOutputStreams.empty() )
    {
        OSL_FAIL( "redirection across pages !!!" );
        m_aOutputStreams.clear(); // leak !
        m_aMapMode.SetOrigin( Point() );
    }
 
    m_aGraphicsStack.clear();
    m_aGraphicsStack.emplace_back( );
 
    // this should pop the PDF graphics stack if necessary
    updateGraphicsState();
 
    m_aPages.back().endStream();
 
    // reset the default font
    Font aFont;
    aFont.SetFamilyName( "Times" );
    aFont.SetFontSize( Size( 0, 12 ) );
 
    m_aCurrentPDFState = m_aGraphicsStack.front();
    m_aGraphicsStack.front().m_aFont =  aFont;
 
    for (auto & bitmap : m_aBitmaps)
    {
        if( ! bitmap.m_aBitmap.IsEmpty() )
        {
            writeBitmapObject(bitmap);
            bitmap.m_aBitmap = BitmapEx();
        }
    }
    for (auto & jpeg : m_aJPGs)
    {
        if( jpeg.m_pStream )
        {
            writeJPG( jpeg );
            jpeg.m_pStream.reset();
            jpeg.m_aAlphaMask = AlphaMask();
        }
    }
    for (auto & item : m_aTransparentObjects)
    {
        if( item.m_pContentStream )
        {
            writeTransparentObject(item);
            item.m_pContentStream.reset();
        }
    }
 
}
 
sal_Int32 PDFWriterImpl::createObject()
{
    m_aObjects.push_back( ~0U );
    return m_aObjects.size();
}
 
bool PDFWriterImpl::updateObject( sal_Int32 n )
{
    if( ! m_bOpen )
        return false;
 
    sal_uInt64 nOffset = ~0U;
    osl::File::RC aError = m_aFile.getPos(nOffset);
    SAL_WARN_IF( aError != osl::File::E_None, "vcl.pdfwriter", "could not register object" );
    if (aError != osl::File::E_None)
    {
        m_aFile.close();
        m_bOpen = false;
    }
    m_aObjects[ n-1 ] = nOffset;
    return aError == osl::File::E_None;
}
 
#define CHECK_RETURN( x ) if( !(x) ) return 0
#define CHECK_RETURN2( x ) if( !(x) ) return
 
sal_Int32 PDFWriterImpl::emitStructParentTree( sal_Int32 nObject )
{
    if( nObject > 0 )
    {
        OStringBuffer aLine( 1024 );
 
        aLine.append( OString::number(nObject)
            + " 0 obj\n"
              "<</Nums[\n" );
        sal_Int32 nTreeItems = m_aStructParentTree.size();
        for( sal_Int32 n = 0; n < nTreeItems; n++ )
        {
            aLine.append( OString::number(n) + " "
                + m_aStructParentTree[n]
                + "\n" );
        }
        aLine.append( "]>>\nendobj\n\n" );
        CHECK_RETURN( updateObject( nObject ) );
        CHECK_RETURN( writeBuffer( aLine ) );
    }
    return nObject;
}
 
// every structure element already has a unique object id - just use it for ID
static OString GenerateID(sal_Int32 const nObjectId)
{
    return "id" + OString::number(nObjectId);
}
 
sal_Int32 PDFWriterImpl::emitStructIDTree(sal_Int32 const nObject)
{
    // loosely following PDF 1.7, 10.6.5 Example of Logical Structure, Example 10.15
    if (nObject < 0)
    {
        return nObject;
    }
    // the name tree entries must be sorted lexicographically.
    std::map<OString, sal_Int32> ids;
    for (auto n : m_StructElemObjsWithID)
    {
        ids.emplace(GenerateID(n), n);
    }
    OStringBuffer buf;
    appendObjectID(nObject, buf);
    buf.append("<</Names [\n");
    for (auto const& it : ids)
    {
        appendLiteralStringEncrypt(it.first, nObject, buf);
        buf.append(" ");
        appendObjectReference(it.second, buf);
        buf.append("\n");
    }
    buf.append("] >>\nendobj\n\n");
 
    CHECK_RETURN( updateObject(nObject) );
    CHECK_RETURN( writeBuffer(buf) );
 
    return nObject;
}
 
const char* PDFWriterImpl::getAttributeTag( PDFWriter::StructAttribute eAttr )
{
    static constexpr auto aAttributeStrings = frozen::make_map<PDFWriter::StructAttribute, const char*>({
        { PDFWriter::Placement,         "Placement" },
        { PDFWriter::WritingMode,       "WritingMode" },
        { PDFWriter::SpaceBefore,       "SpaceBefore" },
        { PDFWriter::SpaceAfter,        "SpaceAfter" },
        { PDFWriter::StartIndent,       "StartIndent" },
        { PDFWriter::EndIndent,         "EndIndent" },
        { PDFWriter::TextIndent,        "TextIndent" },
        { PDFWriter::TextAlign,         "TextAlign" },
        { PDFWriter::Width,             "Width" },
        { PDFWriter::Height,            "Height" },
        { PDFWriter::BlockAlign,        "BlockAlign" },
        { PDFWriter::InlineAlign,       "InlineAlign" },
        { PDFWriter::LineHeight,        "LineHeight" },
        { PDFWriter::BaselineShift,     "BaselineShift" },
        { PDFWriter::TextDecorationType,"TextDecorationType" },
        { PDFWriter::ListNumbering,     "ListNumbering" },
        { PDFWriter::RowSpan,           "RowSpan" },
        { PDFWriter::ColSpan,           "ColSpan" },
        { PDFWriter::Scope,             "Scope" },
        { PDFWriter::Role,              "Role" },
        { PDFWriter::Type,              "Type" },
        { PDFWriter::Subtype,           "Subtype" },
        { PDFWriter::LinkAnnotation,    "LinkAnnotation" }
    });
 
    auto it = aAttributeStrings.find( eAttr );
 
    if( it == aAttributeStrings.end() )
        SAL_INFO("vcl.pdfwriter", "invalid PDFWriter::StructAttribute " << eAttr);
 
    return it != aAttributeStrings.end() ? it->second : "";
}
 
const char* PDFWriterImpl::getAttributeValueTag( PDFWriter::StructAttributeValue eVal )
{
    static constexpr auto aValueStrings = frozen::make_map<PDFWriter::StructAttributeValue, const char*>({
        { PDFWriter::NONE,       "None" },
        { PDFWriter::Block,      "Block" },
        { PDFWriter::Inline,     "Inline" },
        { PDFWriter::Before,     "Before" },
        { PDFWriter::After,      "After" },
        { PDFWriter::Start,      "Start" },
        { PDFWriter::End,        "End" },
        { PDFWriter::LrTb,       "LrTb" },
        { PDFWriter::RlTb,       "RlTb" },
        { PDFWriter::TbRl,       "TbRl" },
        { PDFWriter::Center,     "Center" },
        { PDFWriter::Justify,    "Justify" },
        { PDFWriter::Auto,       "Auto" },
        { PDFWriter::Middle,     "Middle" },
        { PDFWriter::Normal,     "Normal" },
        { PDFWriter::Underline,  "Underline" },
        { PDFWriter::Overline,   "Overline" },
        { PDFWriter::LineThrough,"LineThrough" },
        { PDFWriter::Row,        "Row" },
        { PDFWriter::Column,     "Column" },
        { PDFWriter::Both,       "Both" },
        { PDFWriter::Pagination, "Pagination" },
        { PDFWriter::Layout,     "Layout" },
        { PDFWriter::Page,       "Page" },
        { PDFWriter::Background, "Background" },
        { PDFWriter::Header,     "Header" },
        { PDFWriter::Footer,     "Footer" },
        { PDFWriter::Watermark,  "Watermark" },
        { PDFWriter::Rb,         "rb" },
        { PDFWriter::Cb,         "cb" },
        { PDFWriter::Pb,         "pb" },
        { PDFWriter::Tv,         "tv" },
        { PDFWriter::Disc,       "Disc" },
        { PDFWriter::Circle,     "Circle" },
        { PDFWriter::Square,     "Square" },
        { PDFWriter::Decimal,    "Decimal" },
        { PDFWriter::UpperRoman, "UpperRoman" },
        { PDFWriter::LowerRoman, "LowerRoman" },
        { PDFWriter::UpperAlpha, "UpperAlpha" },
        { PDFWriter::LowerAlpha, "LowerAlpha" }
    });
 
    auto it = aValueStrings.find( eVal );
 
    if( it == aValueStrings.end() )
        SAL_INFO("vcl.pdfwriter", "invalid PDFWriter::StructAttributeValue " << eVal);
 
    return it != aValueStrings.end() ? it->second : "";
}
 
static void appendStructureAttributeLine( PDFWriter::StructAttribute i_eAttr, const PDFStructureAttribute& i_rVal, OStringBuffer& o_rLine, bool i_bIsFixedInt )
{
    o_rLine.append( "/" );
    o_rLine.append( PDFWriterImpl::getAttributeTag( i_eAttr ) );
 
    if( i_rVal.eValue != PDFWriter::Invalid )
    {
        o_rLine.append( "/" );
        o_rLine.append( PDFWriterImpl::getAttributeValueTag( i_rVal.eValue ) );
    }
    else
    {
        // numerical value
        o_rLine.append( " " );
        if( i_bIsFixedInt )
            appendFixedInt( i_rVal.nValue, o_rLine );
        else
            o_rLine.append( i_rVal.nValue );
    }
    o_rLine.append( "\n" );
}
 
template<typename T>
void PDFWriterImpl::AppendAnnotKid(PDFStructureElement& i_rEle, T & rAnnot)
{
    // update struct parent of link
    OString const aStructParentEntry(OString::number(i_rEle.m_nObject) + " 0 R");
    m_aStructParentTree.push_back( aStructParentEntry );
    rAnnot.m_nStructParent = m_aStructParentTree.size()-1;
    sal_Int32 const nAnnotObj(rAnnot.m_nObject);
 
    sal_Int32 const nRefObject = createObject();
    if (updateObject(nRefObject))
    {
        OString aRef =
            OString::number( nRefObject ) +
            " 0 obj\n"
            "<</Type/OBJR/Obj " +
            OString::number(nAnnotObj) +
            " 0 R>>\n"
            "endobj\n\n";
        writeBuffer( aRef );
    }
 
    i_rEle.m_aKids.emplace_back( nRefObject );
}
 
OString PDFWriterImpl::emitStructureAttributes( PDFStructureElement& i_rEle )
{
    // create layout, list and table attribute sets
    OStringBuffer aLayout(256), aList(64), aTable(64);
    OStringBuffer aPrintField;
    for (auto const& attribute : i_rEle.m_aAttributes)
    {
        if( attribute.first == PDFWriter::ListNumbering )
            appendStructureAttributeLine( attribute.first, attribute.second, aList, true );
        else if (attribute.first == PDFWriter::Role)
        {
            appendStructureAttributeLine(attribute.first, attribute.second, aPrintField, true);
        }
        else if( attribute.first == PDFWriter::RowSpan ||
                 attribute.first == PDFWriter::ColSpan ||
                 attribute.first == PDFWriter::Scope)
        {
            appendStructureAttributeLine( attribute.first, attribute.second, aTable, false );
        }
        else if( attribute.first == PDFWriter::LinkAnnotation )
        {
            sal_Int32 nLink = attribute.second.nValue;
            std::map< sal_Int32, sal_Int32 >::const_iterator link_it =
                m_aLinkPropertyMap.find( nLink );
            if( link_it != m_aLinkPropertyMap.end() )
                nLink = link_it->second;
            if( nLink >= 0 && o3tl::make_unsigned(nLink) < m_aLinks.size() )
            {
                AppendAnnotKid(i_rEle, m_aLinks[nLink]);
            }
            else
            {
                OSL_FAIL( "unresolved link id for Link structure" );
                SAL_INFO("vcl.pdfwriter", "unresolved link id " << nLink << " for Link structure");
                if (g_bDebugDisableCompression)
                {
                    OString aLine = "unresolved link id " +
                            OString::number( nLink ) +
                            " for Link structure";
                    emitComment( aLine.getStr() );
                }
            }
        }
        else
            appendStructureAttributeLine( attribute.first, attribute.second, aLayout, true );
    }
    if( ! i_rEle.m_aBBox.IsEmpty() )
    {
        aLayout.append( "/BBox[" );
        appendFixedInt( i_rEle.m_aBBox.Left(), aLayout );
        aLayout.append( " " );
        appendFixedInt( i_rEle.m_aBBox.Top(), aLayout );
        aLayout.append( " " );
        appendFixedInt( i_rEle.m_aBBox.Right(), aLayout );
        aLayout.append( " " );
        appendFixedInt( i_rEle.m_aBBox.Bottom(), aLayout );
        aLayout.append( "]\n" );
    }
 
    std::vector< sal_Int32 > aAttribObjects;
    auto const WriteAttrs = [&](char const*const pName, OStringBuffer & rBuf)
    {
        aAttribObjects.push_back( createObject() );
        if (updateObject( aAttribObjects.back() ))
        {
            OStringBuffer aObj( 64 );
            aObj.append( aAttribObjects.back() );
            aObj.append( " 0 obj\n"
                         "<</O");
            aObj.append(pName);
            aObj.append("\n");
            rBuf.append(">>\nendobj\n\n");
            writeBuffer(aObj);
            writeBuffer(rBuf);
        }
    };
    if( !aLayout.isEmpty() )
    {
        WriteAttrs("/Layout", aLayout);
    }
    if( !aList.isEmpty() )
    {
        WriteAttrs("/List", aList);
    }
    if (!aPrintField.isEmpty())
    {
        WriteAttrs("/PrintField", aPrintField);
    }
    if( !aTable.isEmpty() )
    {
        WriteAttrs("/Table", aTable);
    }
 
    OStringBuffer aRet( 64 );
    if( aAttribObjects.size() > 1 )
        aRet.append( " [" );
    for (auto const& attrib : aAttribObjects)
    {
        aRet.append( " "  + OString::number(attrib) + " 0 R" );
    }
    if( aAttribObjects.size() > 1 )
        aRet.append( " ]" );
    return aRet.makeStringAndClear();
}
 
sal_Int32 PDFWriterImpl::emitStructure( PDFStructureElement& rEle )
{
    assert(rEle.m_nOwnElement == 0 || rEle.m_oType);
    if (rEle.m_nOwnElement != rEle.m_nParentElement // emit the struct tree root
       // do not emit NonStruct and its children
        && *rEle.m_oType == PDFWriter::NonStructElement)
    {
        return 0;
    }
 
    for (auto const& child : rEle.m_aChildren)
    {
        if( child > 0 && o3tl::make_unsigned(child) < m_aStructure.size() )
        {
            PDFStructureElement& rChild = m_aStructure[ child ];
            if (*rChild.m_oType != PDFWriter::NonStructElement)
            {
                if( rChild.m_nParentElement == rEle.m_nOwnElement )
                    emitStructure( rChild );
                else
                {
                    OSL_FAIL( "PDFWriterImpl::emitStructure: invalid child structure element" );
                    SAL_INFO("vcl.pdfwriter", "PDFWriterImpl::emitStructure: invalid child structure element with id " << child);
                }
            }
        }
        else
        {
            OSL_FAIL( "PDFWriterImpl::emitStructure: invalid child structure id" );
            SAL_INFO("vcl.pdfwriter", "PDFWriterImpl::emitStructure: invalid child structure id " << child);
        }
    }
 
    OStringBuffer aLine( 512 );
    aLine.append(
        OString::number(rEle.m_nObject)
        + " 0 obj\n"
          "<</Type" );
    sal_Int32 nParentTree = -1;
    sal_Int32 nIDTree = -1;
    if( rEle.m_nOwnElement == rEle.m_nParentElement )
    {
        nParentTree = createObject();
        CHECK_RETURN( nParentTree );
        aLine.append( "/StructTreeRoot\n"
            "/ParentTree "
            + OString::number(nParentTree)
            + " 0 R\n" );
        if( ! m_aRoleMap.empty() )
        {
            aLine.append( "/RoleMap<<" );
            for (auto const& role : m_aRoleMap)
            {
                aLine.append( "/" + role.first + "/" + role.second + "\n" );
            }
            aLine.append( ">>\n" );
        }
        if (!m_StructElemObjsWithID.empty())
        {
            nIDTree = createObject();
            aLine.append("/IDTree ");
            appendObjectReference(nIDTree, aLine);
            aLine.append("\n");
        }
    }
    else
    {
        aLine.append( "/StructElem\n"
                      "/S/" );
        if( !rEle.m_aAlias.isEmpty() )
            aLine.append( rEle.m_aAlias );
        else
            aLine.append( getStructureTag(*rEle.m_oType) );
        if (m_StructElemObjsWithID.find(rEle.m_nObject) != m_StructElemObjsWithID.end())
        {
            aLine.append("\n/ID ");
            appendLiteralStringEncrypt(GenerateID(rEle.m_nObject), rEle.m_nObject, aLine);
        }
        aLine.append(
            "\n"
            "/P "
            + OString::number(m_aStructure[ rEle.m_nParentElement ].m_nObject)
            + " 0 R\n"
              "/Pg "
            + OString::number(rEle.m_nFirstPageObject)
            + " 0 R\n" );
        if( !rEle.m_aActualText.isEmpty() )
        {
            aLine.append( "/ActualText" );
            appendUnicodeTextStringEncrypt( rEle.m_aActualText, rEle.m_nObject, aLine );
            aLine.append( "\n" );
        }
        if( !rEle.m_aAltText.isEmpty() )
        {
            aLine.append( "/Alt" );
            appendUnicodeTextStringEncrypt( rEle.m_aAltText, rEle.m_nObject, aLine );
            aLine.append( "\n" );
        }
    }
    if( (! rEle.m_aBBox.IsEmpty()) || (! rEle.m_aAttributes.empty()) )
    {
        OString aAttribs =  emitStructureAttributes( rEle );
        if( !aAttribs.isEmpty() )
        {
            aLine.append( "/A" + aAttribs + "\n" );
        }
    }
    if( !rEle.m_aLocale.Language.isEmpty() )
    {
        /* PDF allows only RFC 3066, which is only partly BCP 47 and does not
         * include script tags and others.
         * http://pdf.editme.com/pdfua-naturalLanguageSpecification
         * http://partners.adobe.com/public/developer/en/pdf/PDFReference16.pdf#page=886
         * https://www.adobe.com/content/dam/Adobe/en/devnet/pdf/pdfs/PDF32000_2008.pdf#M13.9.19332.1Heading.97.Natural.Language.Specification
         * */
        LanguageTag aLanguageTag( rEle.m_aLocale);
        OUString aLanguage, aScript, aCountry;
        aLanguageTag.getIsoLanguageScriptCountry( aLanguage, aScript, aCountry);
        if (!aLanguage.isEmpty())
        {
            OUStringBuffer aLocBuf( 16 );
            aLocBuf.append( aLanguage );
            if( !aCountry.isEmpty() )
            {
                aLocBuf.append( "-" + aCountry );
            }
            aLine.append( "/Lang" );
            appendLiteralStringEncrypt( aLocBuf, rEle.m_nObject, aLine );
            aLine.append( "\n" );
        }
    }
    if (!rEle.m_AnnotIds.empty())
    {
        for (auto const id : rEle.m_AnnotIds)
        {
            auto const it(m_aLinkPropertyMap.find(id));
            assert(it != m_aLinkPropertyMap.end());
 
            if (*rEle.m_oType == PDFWriter::Form)
            {
                assert(0 <= it->second && o3tl::make_unsigned(it->second) < m_aWidgets.size());
                AppendAnnotKid(rEle, m_aWidgets[it->second]);
            }
            else
            {
                assert(0 <= it->second && o3tl::make_unsigned(it->second) < m_aScreens.size());
                AppendAnnotKid(rEle, m_aScreens[it->second]);
            }
        }
    }
    if( ! rEle.m_aKids.empty() )
    {
        unsigned int i = 0;
        aLine.append( "/K[" );
        for (auto const& kid : rEle.m_aKids)
        {
            if( kid.nMCID == -1 )
            {
                aLine.append(
                    OString::number(kid.nObject)
                    + " 0 R" );
                aLine.append( ( (i & 15) == 15 ) ? "\n" : " " );
            }
            else
            {
                if( kid.nObject == rEle.m_nFirstPageObject )
                {
                    aLine.append( OString::number(kid.nMCID) + " " );
                }
                else
                {
                    aLine.append(
                        "<</Type/MCR/Pg "
                        + OString::number(kid.nObject)
                        + " 0 R /MCID "
                        + OString::number(kid.nMCID)
                        + ">>\n" );
                }
            }
            ++i;
        }
        aLine.append( "]\n" );
    }
    aLine.append( ">>\nendobj\n\n" );
 
    CHECK_RETURN( updateObject( rEle.m_nObject ) );
    CHECK_RETURN( writeBuffer( aLine ) );
 
    CHECK_RETURN( emitStructParentTree( nParentTree ) );
    CHECK_RETURN( emitStructIDTree(nIDTree) );
 
    return rEle.m_nObject;
}
 
bool PDFWriterImpl::emitGradients()
{
    for (auto const& gradient : m_aGradients)
    {
        if ( !writeGradientFunction( gradient ) ) return false;
    }
    return true;
}
 
bool PDFWriterImpl::emitTilings()
{
    OStringBuffer aTilingObj( 1024 );
 
    for (auto & tiling : m_aTilings)
    {
        SAL_WARN_IF( !tiling.m_pTilingStream, "vcl.pdfwriter", "tiling without stream" );
        if( ! tiling.m_pTilingStream )
            continue;
 
        aTilingObj.setLength( 0 );
 
        if (g_bDebugDisableCompression)
        {
            emitComment( "PDFWriterImpl::emitTilings" );
        }
 
        sal_Int32 nX = static_cast<sal_Int32>(tiling.m_aRectangle.Left());
        sal_Int32 nY = static_cast<sal_Int32>(tiling.m_aRectangle.Top());
        sal_Int32 nW = static_cast<sal_Int32>(tiling.m_aRectangle.GetWidth());
        sal_Int32 nH = static_cast<sal_Int32>(tiling.m_aRectangle.GetHeight());
        if( tiling.m_aCellSize.Width() == 0 )
            tiling.m_aCellSize.setWidth( nW );
        if( tiling.m_aCellSize.Height() == 0 )
            tiling.m_aCellSize.setHeight( nH );
 
        bool bDeflate = compressStream( tiling.m_pTilingStream.get() );
        sal_uInt64 const nTilingStreamSize = tiling.m_pTilingStream->TellEnd();
        tiling.m_pTilingStream->Seek( STREAM_SEEK_TO_BEGIN );
 
        // write pattern object
        aTilingObj.append(
            OString::number(tiling.m_nObject)
            + " 0 obj\n"
              "<</Type/Pattern/PatternType 1\n"
              "/PaintType 1\n"
              "/TilingType 2\n"
              "/BBox[" );
        appendFixedInt( nX, aTilingObj );
        aTilingObj.append( ' ' );
        appendFixedInt( nY, aTilingObj );
        aTilingObj.append( ' ' );
        appendFixedInt( nX+nW, aTilingObj );
        aTilingObj.append( ' ' );
        appendFixedInt( nY+nH, aTilingObj );
        aTilingObj.append( "]\n"
                           "/XStep " );
        appendFixedInt( tiling.m_aCellSize.Width(), aTilingObj );
        aTilingObj.append( "\n"
                           "/YStep " );
        appendFixedInt( tiling.m_aCellSize.Height(), aTilingObj );
        aTilingObj.append( "\n" );
        if( tiling.m_aTransform.matrix[0] != 1.0 ||
            tiling.m_aTransform.matrix[1] != 0.0 ||
            tiling.m_aTransform.matrix[3] != 0.0 ||
            tiling.m_aTransform.matrix[4] != 1.0 ||
            tiling.m_aTransform.matrix[2] != 0.0 ||
            tiling.m_aTransform.matrix[5] != 0.0 )
        {
            aTilingObj.append( "/Matrix [" );
            // TODO: scaling, mirroring on y, etc
            appendDouble( tiling.m_aTransform.matrix[0], aTilingObj );
            aTilingObj.append( ' ' );
            appendDouble( tiling.m_aTransform.matrix[1], aTilingObj );
            aTilingObj.append( ' ' );
            appendDouble( tiling.m_aTransform.matrix[3], aTilingObj );
            aTilingObj.append( ' ' );
            appendDouble( tiling.m_aTransform.matrix[4], aTilingObj );
            aTilingObj.append( ' ' );
            appendDouble( tiling.m_aTransform.matrix[2], aTilingObj );
            aTilingObj.append( ' ' );
            appendDouble( tiling.m_aTransform.matrix[5], aTilingObj );
            aTilingObj.append( "]\n" );
        }
        aTilingObj.append( "/Resources" );
        tiling.m_aResources.append( aTilingObj, getFontDictObject() );
        if( bDeflate )
            aTilingObj.append( "/Filter/FlateDecode" );
        aTilingObj.append( "/Length "
            + OString::number(static_cast<sal_Int32>(nTilingStreamSize))
            + ">>\nstream\n" );
        if ( !updateObject( tiling.m_nObject ) ) return false;
        if ( !writeBuffer( aTilingObj ) ) return false;
        checkAndEnableStreamEncryption( tiling.m_nObject );
        bool written = writeBufferBytes( tiling.m_pTilingStream->GetData(), nTilingStreamSize );
        tiling.m_pTilingStream.reset();
        if( !written )
            return false;
        disableStreamEncryption();
        aTilingObj.setLength( 0 );
        aTilingObj.append( "\nendstream\nendobj\n\n" );
        if ( !writeBuffer( aTilingObj ) ) return false;
    }
    return true;
}
 
sal_Int32 PDFWriterImpl::emitBuildinFont(const pdf::BuildinFontFace* pFD, sal_Int32 nFontObject)
{
    if( !pFD )
        return 0;
    const pdf::BuildinFont& rBuildinFont = pFD->GetBuildinFont();
 
    OStringBuffer aLine( 1024 );
 
    if( nFontObject <= 0 )
        nFontObject = createObject();
    CHECK_RETURN( updateObject( nFontObject ) );
    aLine.append(
        OString::number(nFontObject)
        + " 0 obj\n"
          "<</Type/Font/Subtype/Type1/BaseFont/" );
    appendName( rBuildinFont.m_pPSName, aLine );
    aLine.append( "\n" );
    if( rBuildinFont.m_eCharSet == RTL_TEXTENCODING_MS_1252 )
         aLine.append( "/Encoding/WinAnsiEncoding\n" );
    aLine.append( ">>\nendobj\n\n" );
    CHECK_RETURN( writeBuffer( aLine ) );
    return nFontObject;
}
 
namespace
{
// Translate units from TT to PS (standard 1/1000)
int XUnits(int nUPEM, int n) { return (n * 1000) / nUPEM; }
}
 
std::map< sal_Int32, sal_Int32 > PDFWriterImpl::emitSystemFont( const vcl::font::PhysicalFontFace* pFace, EmbedFont const & rEmbed )
{
    std::map< sal_Int32, sal_Int32 > aRet;
 
    if (g_bDebugDisableCompression)
        emitComment("PDFWriterImpl::emitSystemFont");
 
    FontSubsetInfo aInfo;
    // fill in dummy values
    aInfo.m_nAscent = 1000;
    aInfo.m_nDescent = 200;
    aInfo.m_nCapHeight = 1000;
    aInfo.m_aFontBBox = tools::Rectangle( Point( -200, -200 ), Size( 1700, 1700 ) );
    aInfo.m_aPSName = pFace->GetFamilyName();
 
    sal_Int32 pWidths[256] = { 0 };
    const LogicalFontInstance* pFontInstance = rEmbed.m_pFontInstance;
    auto nUPEM = pFace->UnitsPerEm();
    for( sal_Ucs c = 32; c < 256; c++ )
    {
        sal_GlyphId nGlyph = pFontInstance->GetGlyphIndex(c);
        pWidths[c] = XUnits(nUPEM, pFontInstance->GetGlyphWidth(nGlyph, false, false));
    }
 
    // We are interested only in filling aInfo
    sal_GlyphId aGlyphIds[] = { 0 };
    sal_uInt8 pEncoding[] = { 0 };
    std::vector<sal_uInt8> aBuffer;
    pFace->CreateFontSubset(aBuffer, aGlyphIds, pEncoding, 1, aInfo);
 
    // write font descriptor
    sal_Int32 nFontDescriptor = emitFontDescriptor( pFace, aInfo, 0, 0 );
    if( nFontDescriptor )
    {
        // write font object
        sal_Int32 nObject = createObject();
        if( updateObject( nObject ) )
        {
            OStringBuffer aLine( 1024 );
            aLine.append(
                OString::number(nObject)
                + " 0 obj\n"
                  "<</Type/Font/Subtype/TrueType"
                  "/BaseFont/" );
            appendName( aInfo.m_aPSName, aLine );
            aLine.append( "\n" );
            if (!pFace->IsMicrosoftSymbolEncoded())
                aLine.append( "/Encoding/WinAnsiEncoding\n" );
            aLine.append( "/FirstChar 32 /LastChar 255\n"
                          "/Widths[" );
            for( int i = 32; i < 256; i++ )
            {
                aLine.append( pWidths[i] );
                aLine.append( ((i&15) == 15) ? "\n" : " " );
            }
            aLine.append( "]\n"
                          "/FontDescriptor "
                + OString::number( nFontDescriptor )
                + " 0 R>>\n"
                  "endobj\n\n" );
            writeBuffer( aLine );
 
            aRet[ rEmbed.m_nNormalFontID ] = nObject;
        }
    }
 
    return aRet;
}
 
namespace
{
uint32_t fillSubsetArrays(const FontEmit& rSubset, sal_GlyphId* pGlyphIds, sal_Int32* pWidths,
                          sal_uInt8* pEncoding, sal_Int32* pEncToUnicodeIndex,
                          sal_Int32* pCodeUnitsPerGlyph, std::vector<sal_Ucs>& rCodeUnits,
                          sal_Int32& nToUnicodeStream)
{
    rCodeUnits.reserve(256);
 
    // if it gets used then it will appear in s_subset.m_aMapping, otherwise 0 is fine
    pWidths[0] = 0;
 
    uint32_t nGlyphs = 1;
    for (auto const& item : rSubset.m_aMapping)
    {
        sal_uInt8 nEnc = item.second.getGlyphId();
 
        SAL_WARN_IF(pGlyphIds[nEnc] != 0 || pEncoding[nEnc] != 0, "vcl.pdfwriter",
                    "duplicate glyph");
        SAL_WARN_IF(nEnc > rSubset.m_aMapping.size(), "vcl.pdfwriter", "invalid glyph encoding");
 
        pGlyphIds[nEnc] = item.first;
        pEncoding[nEnc] = nEnc;
        pEncToUnicodeIndex[nEnc] = static_cast<sal_Int32>(rCodeUnits.size());
        pCodeUnitsPerGlyph[nEnc] = item.second.countCodes();
        pWidths[nEnc] = item.second.getGlyphWidth();
        for (sal_Int32 n = 0; n < pCodeUnitsPerGlyph[nEnc]; n++)
            rCodeUnits.push_back(item.second.getCode(n));
        if (item.second.getCode(0))
            nToUnicodeStream = 1;
        if (nGlyphs < 256)
            nGlyphs++;
        else
            OSL_FAIL("too many glyphs for subset");
    }
 
    return nGlyphs;
}
}
 
bool PDFWriterImpl::emitType3Font(const vcl::font::PhysicalFontFace* pFace,
                                  const FontSubset& rType3Font,
                                  std::map<sal_Int32, sal_Int32>& rFontIDToObject)
{
    if (g_bDebugDisableCompression)
        emitComment("PDFWriterImpl::emitType3Font");
 
    const auto& rColorPalettes = pFace->GetColorPalettes();
 
    FontSubsetInfo aSubsetInfo;
    sal_GlyphId pTempGlyphIds[] = { 0 };
    sal_uInt8 pTempEncoding[] = { 0 };
    std::vector<sal_uInt8> aBuffer;
    pFace->CreateFontSubset(aBuffer, pTempGlyphIds, pTempEncoding, 1, aSubsetInfo);
 
    for (auto& rSubset : rType3Font.m_aSubsets)
    {
        sal_GlyphId pGlyphIds[256] = {};
        sal_Int32 pWidths[256];
        sal_uInt8 pEncoding[256] = {};
        sal_Int32 pEncToUnicodeIndex[256] = {};
        sal_Int32 pCodeUnitsPerGlyph[256] = {};
        std::vector<sal_Ucs> aCodeUnits;
        sal_Int32 nToUnicodeStream = 0;
 
        // fill arrays and prepare encoding index map
        auto nGlyphs = fillSubsetArrays(rSubset, pGlyphIds, pWidths, pEncoding, pEncToUnicodeIndex,
                                        pCodeUnitsPerGlyph, aCodeUnits, nToUnicodeStream);
 
        // write font descriptor
        sal_Int32 nFontDescriptor = 0;
        if (m_aContext.Version > PDFWriter::PDFVersion::PDF_1_4)
            nFontDescriptor = emitFontDescriptor(pFace, aSubsetInfo, rSubset.m_nFontID, 0);
 
        if (nToUnicodeStream)
            nToUnicodeStream = createToUnicodeCMap(pEncoding, aCodeUnits, pCodeUnitsPerGlyph,
                                                   pEncToUnicodeIndex, nGlyphs);
 
        // write font object
        sal_Int32 nFontObject = createObject();
        if (!updateObject(nFontObject))
            return false;
 
        OStringBuffer aLine(1024);
        aLine.append(
            OString::number(nFontObject)
            + " 0 obj\n"
              "<</Type/Font/Subtype/Type3/Name/");
        appendName(aSubsetInfo.m_aPSName, aLine);
 
        aLine.append(
            "\n/FontBBox["
        // note: Top and Bottom are reversed in VCL and PDF rectangles
            + OString::number(aSubsetInfo.m_aFontBBox.Left())
            + " "
            + OString::number(aSubsetInfo.m_aFontBBox.Top())
            + " "
            + OString::number(aSubsetInfo.m_aFontBBox.Right())
            + " "
            + OString::number(aSubsetInfo.m_aFontBBox.Bottom() + 1)
            + "]\n");
 
        auto nScale = 1. / pFace->UnitsPerEm();
        aLine.append(
            "/FontMatrix["
            + OString::number(nScale)
            + " 0 0 "
            + OString::number(nScale)
            + " 0 0]\n");
 
        sal_Int32 pGlyphStreams[256] = {};
        aLine.append("/CharProcs<<\n");
        for (auto i = 1u; i < nGlyphs; i++)
        {
            auto nStream = createObject();
            aLine.append("/"
                + pFace->GetGlyphName(pGlyphIds[i], true)
                + " "
                + OString::number(nStream)
                + " 0 R\n");
            pGlyphStreams[i] = nStream;
        }
        aLine.append(">>\n"
 
            "/Encoding<</Type/Encoding/Differences[1");
        for (auto i = 1u; i < nGlyphs; i++)
            aLine.append(" /" + pFace->GetGlyphName(pGlyphIds[i], true));
        aLine.append("]>>\n"
 
            "/FirstChar 0\n"
            "/LastChar "
            + OString::number(nGlyphs)
            + "\n"
 
            "/Widths[");
        for (auto i = 0u; i < nGlyphs; i++)
        {
            aLine.append(OString::number(pWidths[i]) + " ");
        }
        aLine.append("]\n");
 
        if (m_aContext.Version > PDFWriter::PDFVersion::PDF_1_4)
        {
            aLine.append("/FontDescriptor " + OString::number(nFontDescriptor) + " 0 R\n");
        }
 
        auto nResources = createObject();
        aLine.append("/Resources " + OString::number(nResources) + " 0 R\n");
 
        if (nToUnicodeStream)
        {
            aLine.append("/ToUnicode " + OString::number(nToUnicodeStream) + " 0 R\n");
        }
 
        aLine.append(">>\n"
                     "endobj\n\n");
 
        if (!writeBuffer(aLine))
            return false;
 
        std::set<sal_Int32> aUsedFonts;
        std::list<BitmapEmit> aUsedBitmaps;
        std::map<sal_uInt8, sal_Int32> aUsedAlpha;
        ResourceDict aResourceDict;
        std::list<StreamRedirect> aOutputStreams;
 
        // Scale for glyph outlines.
        double fScaleX = GetDPIX() / 72.;
        double fScaleY = GetDPIY() / 72.;
 
        for (auto i = 1u; i < nGlyphs; i++)
        {
            auto nStream = pGlyphStreams[i];
            if (!updateObject(nStream))
                return false;
            OStringBuffer aContents(1024);
            aContents.append(OString::number(pWidths[i]) + " 0 d0\n");
 
            const auto& rGlyph = rSubset.m_aMapping.find(pGlyphIds[i])->second;
            const auto& rLayers = rGlyph.getColorLayers();
            for (const auto& rLayer : rLayers)
            {
                aUsedFonts.insert(rLayer.m_nFontID);
 
                aContents.append("q ");
                // 0xFFFF is a special value means foreground color.
                if (rLayer.m_nColorIndex != 0xFFFF)
                {
                    auto& rPalette = rColorPalettes[0];
                    auto aColor(rPalette[rLayer.m_nColorIndex]);
                    appendNonStrokingColor(aColor, aContents);
                    aContents.append(" ");
                    if (aColor.GetAlpha() != 0xFF
                        && m_aContext.Version >= PDFWriter::PDFVersion::PDF_1_4)
                    {
                        auto nAlpha = aColor.GetAlpha();
                        OStringBuffer aName(16);
                        aName.append("GS");
                        appendHex(nAlpha, aName);
 
                        aContents.append("/" + aName + " gs ");
 
                        if (aUsedAlpha.find(nAlpha) == aUsedAlpha.end())
                        {
                            auto nObject = createObject();
                            aUsedAlpha[nAlpha] = nObject;
                            pushResource(ResourceKind::ExtGState, aName.makeStringAndClear(),
                                         nObject, aResourceDict, aOutputStreams);
                        }
                    }
                }
                aContents.append(
                    "BT "
                    "/F" + OString::number(rLayer.m_nFontID) + " "
                    + OString::number(pFace->UnitsPerEm()) + " Tf "
                    "<");
                appendHex(rLayer.m_nSubsetGlyphID, aContents);
                aContents.append(
                    ">Tj "
                    "ET "
                    "Q\n");
            }
 
            tools::Rectangle aRect;
            const auto& rBitmapData = rGlyph.getColorBitmap(aRect);
            if (!rBitmapData.empty())
            {
                SvMemoryStream aStream(const_cast<uint8_t*>(rBitmapData.data()), rBitmapData.size(),
                                       StreamMode::READ);
                vcl::PngImageReader aReader(aStream);
                auto aBitmapEmit = createBitmapEmit(std::move(aReader.read()), Graphic(),
                                                    aUsedBitmaps, aResourceDict, aOutputStreams);
 
                auto nObject = aBitmapEmit.m_aReferenceXObject.getObject();
                aContents.append(
                    "q "
                    + OString::number(aRect.GetWidth())
                    + " 0 0 "
                    + OString::number(aRect.GetHeight())
                    + " "
                    + OString::number(aRect.getX())
                    + " "
                    + OString::number(aRect.getY())
                    + " cm "
                      "/Im"
                    + OString::number(nObject)
                    + " Do Q\n");
            }
 
            const auto& rOutline = rGlyph.getOutline();
            if (rOutline.count())
            {
                aContents.append("q ");
                appendDouble(fScaleX, aContents);
                aContents.append(" 0 0 ");
                appendDouble(fScaleY, aContents);
                aContents.append(" 0 ");
                appendDouble(m_aPages.back().getHeight() * -fScaleY, aContents, 3);
                aContents.append(" cm\n");
                m_aPages.back().appendPolyPolygon(rOutline, aContents);
                aContents.append("f\n"
                                 "Q\n");
            }
 
            aLine.setLength(0);
            aLine.append(OString::number(nStream)
                + " 0 obj\n<</Length "
                + OString::number(aContents.getLength())
                + ">>\nstream\n");
            if (!writeBuffer(aLine))
                return false;
            if (!writeBuffer(aContents))
                return false;
            aLine.setLength(0);
            aLine.append("endstream\nendobj\n\n");
            if (!writeBuffer(aLine))
                return false;
        }
 
        // write font dict
        sal_Int32 nFontDict = 0;
        if (!aUsedFonts.empty())
        {
            nFontDict = createObject();
            aLine.setLength(0);
            aLine.append(OString::number(nFontDict) + " 0 obj\n<<");
            for (auto nFontID : aUsedFonts)
            {
                aLine.append("/F"
                    + OString::number(nFontID)
                    + " "
                    + OString::number(rFontIDToObject[nFontID])
                    + " 0 R");
            }
            aLine.append(">>\nendobj\n\n");
            if (!updateObject(nFontDict))
                return false;
            if (!writeBuffer(aLine))
                return false;
        }
 
        // write ExtGState objects
        if (!aUsedAlpha.empty())
        {
            for (const auto & [ nAlpha, nObject ] : aUsedAlpha)
            {
                aLine.setLength(0);
                aLine.append(OString::number(nObject) + " 0 obj\n<<");
                if (m_bIsPDF_A1)
                {
                    aLine.append("/CA 1.0/ca 1.0");
                    m_aErrors.insert(PDFWriter::Warning_Transparency_Omitted_PDFA);
                }
                else
                {
                    aLine.append("/CA ");
                    appendDouble(nAlpha / 255., aLine);
                    aLine.append("/ca ");
                    appendDouble(nAlpha / 255., aLine);
                }
                aLine.append(">>\nendobj\n\n");
                if (!updateObject(nObject))
                    return false;
                if (!writeBuffer(aLine))
                    return false;
            }
        }
 
        // write bitmap objects
        for (auto& aBitmap : aUsedBitmaps)
            writeBitmapObject(aBitmap);
 
        // write resources dict
        aLine.setLength(0);
        aLine.append(OString::number(nResources) + " 0 obj\n");
        aResourceDict.append(aLine, nFontDict);
        aLine.append("endobj\n\n");
        if (!updateObject(nResources))
            return false;
        if (!writeBuffer(aLine))
            return false;
 
        rFontIDToObject[rSubset.m_nFontID] = nFontObject;
    }
 
    return true;
}
 
typedef int ThreeInts[3];
static bool getPfbSegmentLengths( const unsigned char* pFontBytes, int nByteLen,
    ThreeInts& rSegmentLengths )
{
    if( !pFontBytes || (nByteLen < 0) )
        return false;
    const unsigned char* pPtr = pFontBytes;
    const unsigned char* pEnd = pFontBytes + nByteLen;
 
    for(int & rSegmentLength : rSegmentLengths) {
        // read segment1 header
        if( pPtr+6 >= pEnd )
            return false;
        if( (pPtr[0] != 0x80) || (pPtr[1] >= 0x03) )
            return false;
        const int nLen = (pPtr[5]<<24) + (pPtr[4]<<16) + (pPtr[3]<<8) + pPtr[2];
        if( nLen <= 0)
            return false;
        rSegmentLength = nLen;
        pPtr += nLen + 6;
    }
 
    // read segment-end header
    if( pPtr+2 >= pEnd )
        return false;
    if( (pPtr[0] != 0x80) || (pPtr[1] != 0x03) )
        return false;
 
    return true;
}
 
static void appendSubsetName( int nSubsetID, std::u16string_view rPSName, OStringBuffer& rBuffer )
{
    if( nSubsetID )
    {
        for( int i = 0; i < 6; i++ )
        {
            int nOffset = nSubsetID % 26;
            nSubsetID /= 26;
            rBuffer.append( static_cast<char>('A'+nOffset) );
        }
        rBuffer.append( '+' );
    }
    appendName( rPSName, rBuffer );
}
 
sal_Int32 PDFWriterImpl::createToUnicodeCMap( sal_uInt8 const * pEncoding,
                                              const std::vector<sal_Ucs>& rCodeUnits,
                                              const sal_Int32* pCodeUnitsPerGlyph,
                                              const sal_Int32* pEncToUnicodeIndex,
                                              uint32_t nGlyphs )
{
    int nMapped = 0;
    for (auto n = 0u; n < nGlyphs; ++n)
        if (pCodeUnitsPerGlyph[n] && rCodeUnits[pEncToUnicodeIndex[n]])
            nMapped++;
 
    if( nMapped == 0 )
        return 0;
 
    sal_Int32 nStream = createObject();
    CHECK_RETURN( updateObject( nStream ) );
 
    OStringBuffer aContents( 1024 );
    aContents.append(
                     "/CIDInit/ProcSet findresource begin\n"
                     "12 dict begin\n"
                     "begincmap\n"
                     "/CIDSystemInfo<<\n"
                     "/Registry (Adobe)\n"
                     "/Ordering (UCS)\n"
                     "/Supplement 0\n"
                     ">> def\n"
                     "/CMapName/Adobe-Identity-UCS def\n"
                     "/CMapType 2 def\n"
                     "1 begincodespacerange\n"
                     "<00> <FF>\n"
                     "endcodespacerange\n"
                     );
    int nCount = 0;
    for (auto n = 0u; n < nGlyphs; ++n)
    {
        if (pCodeUnitsPerGlyph[n] && rCodeUnits[pEncToUnicodeIndex[n]])
        {
            if( (nCount % 100) == 0 )
            {
                if( nCount )
                    aContents.append( "endbfchar\n" );
                aContents.append( OString::number(static_cast<sal_Int32>(std::min(nMapped-nCount, 100)) )
                    + " beginbfchar\n" );
            }
            aContents.append( '<' );
            appendHex( static_cast<sal_Int8>(pEncoding[n]), aContents );
            aContents.append( "> <" );
            // TODO: handle code points>U+FFFF
            sal_Int32 nIndex = pEncToUnicodeIndex[n];
            for( sal_Int32 j = 0; j < pCodeUnitsPerGlyph[n]; j++ )
            {
                appendHex( static_cast<sal_Int8>(rCodeUnits[nIndex + j] / 256), aContents );
                appendHex( static_cast<sal_Int8>(rCodeUnits[nIndex + j] & 255), aContents );
            }
            aContents.append( ">\n" );
            nCount++;
        }
    }
    aContents.append( "endbfchar\n"
                      "endcmap\n"
                      "CMapName currentdict /CMap defineresource pop\n"
                      "end\n"
                      "end\n" );
    SvMemoryStream aStream;
    if (!g_bDebugDisableCompression)
    {
        ZCodec aCodec( 0x4000, 0x4000 );
        aCodec.BeginCompression();
        aCodec.Write( aStream, reinterpret_cast<const sal_uInt8*>(aContents.getStr()), aContents.getLength() );
        aCodec.EndCompression();
    }
 
    if (g_bDebugDisableCompression)
    {
        emitComment( "PDFWriterImpl::createToUnicodeCMap" );
    }
    OStringBuffer aLine( 40 );
 
    aLine.append( OString::number(nStream ) + " 0 obj\n<</Length " );
    sal_Int32 nLen = 0;
    if (!g_bDebugDisableCompression)
    {
        nLen = static_cast<sal_Int32>(aStream.Tell());
        aStream.Seek( 0 );
        aLine.append( OString::number(nLen) + "/Filter/FlateDecode" );
    }
    else
        aLine.append( aContents.getLength() );
    aLine.append( ">>\nstream\n" );
    CHECK_RETURN( writeBuffer( aLine ) );
    checkAndEnableStreamEncryption( nStream );
    if (!g_bDebugDisableCompression)
    {
        CHECK_RETURN( writeBufferBytes( aStream.GetData(), nLen ) );
    }
    else
    {
        CHECK_RETURN( writeBuffer( aContents ) );
    }
    disableStreamEncryption();
    aLine.setLength( 0 );
    aLine.append( "\nendstream\n"
                  "endobj\n\n" );
    CHECK_RETURN( writeBuffer( aLine ) );
    return nStream;
}
 
sal_Int32 PDFWriterImpl::emitFontDescriptor( const vcl::font::PhysicalFontFace* pFace, FontSubsetInfo const & rInfo, sal_Int32 nSubsetID, sal_Int32 nFontStream )
{
    OStringBuffer aLine( 1024 );
    // get font flags, see PDF reference 1.4 p. 358
    // possibly characters outside Adobe standard encoding
    // so set Symbolic flag
    sal_Int32 nFontFlags = (1<<2);
    if( pFace->GetItalic() == ITALIC_NORMAL || pFace->GetItalic() == ITALIC_OBLIQUE )
        nFontFlags |= (1 << 6);
    if( pFace->GetPitch() == PITCH_FIXED )
        nFontFlags |= 1;
    if( pFace->GetFamilyType() == FAMILY_SCRIPT )
        nFontFlags |= (1 << 3);
    else if( pFace->GetFamilyType() == FAMILY_ROMAN )
        nFontFlags |= (1 << 1);
 
    sal_Int32 nFontDescriptor = createObject();
    CHECK_RETURN( updateObject( nFontDescriptor ) );
    aLine.setLength( 0 );
    aLine.append(
        OString::number(nFontDescriptor)
        + " 0 obj\n"
          "<</Type/FontDescriptor/FontName/" );
    appendSubsetName( nSubsetID, rInfo.m_aPSName, aLine );
    aLine.append( "\n"
                  "/Flags "
        + OString::number( nFontFlags )
        + "\n"
          "/FontBBox["
    // note: Top and Bottom are reversed in VCL and PDF rectangles
        + OString::number( static_cast<sal_Int32>(rInfo.m_aFontBBox.Left()) )
        + " "
        + OString::number( static_cast<sal_Int32>(rInfo.m_aFontBBox.Top()) )
        + " "
        + OString::number( static_cast<sal_Int32>(rInfo.m_aFontBBox.Right()) )
        + " "
        + OString::number( static_cast<sal_Int32>(rInfo.m_aFontBBox.Bottom()+1) )
        +  "]/ItalicAngle " );
    if( pFace->GetItalic() == ITALIC_OBLIQUE || pFace->GetItalic() == ITALIC_NORMAL )
        aLine.append( "-30" );
    else
        aLine.append( "0" );
    aLine.append( "\n"
                  "/Ascent "
        + OString::number( static_cast<sal_Int32>(rInfo.m_nAscent) )
        + "\n"
          "/Descent "
        + OString::number( static_cast<sal_Int32>(-rInfo.m_nDescent) )
        + "\n"
          "/CapHeight "
        + OString::number( static_cast<sal_Int32>(rInfo.m_nCapHeight) )
    // According to PDF reference 1.4 StemV is required
    // seems a tad strange to me, but well ...
        + "\n"
          "/StemV 80\n" );
    if( nFontStream )
    {
        aLine.append( "/FontFile" );
        switch( rInfo.m_nFontType )
        {
            case FontType::SFNT_TTF:
                aLine.append( '2' );
                break;
            case FontType::TYPE1_PFA:
            case FontType::TYPE1_PFB:
            case FontType::ANY_TYPE1:
                break;
            default:
                OSL_FAIL( "unknown fonttype in PDF font descriptor" );
                return 0;
        }
        aLine.append( " " + OString::number(nFontStream) + " 0 R\n" );
    }
    aLine.append( ">>\n"
                  "endobj\n\n" );
    CHECK_RETURN( writeBuffer( aLine ) );
 
    return nFontDescriptor;
}
 
void PDFWriterImpl::appendBuildinFontsToDict( OStringBuffer& rDict ) const
{
    for (auto const& item : m_aBuildinFontToObjectMap)
    {
        rDict.append( pdf::BuildinFontFace::Get(item.first).getNameObject() );
        rDict.append( ' ' );
        rDict.append( item.second );
        rDict.append( " 0 R" );
    }
}
 
bool PDFWriterImpl::emitFonts()
{
    OStringBuffer aLine( 1024 );
 
    std::map< sal_Int32, sal_Int32 > aFontIDToObject;
 
    for (const auto & subset : m_aSubsets)
    {
        for (auto & s_subset :subset.second.m_aSubsets)
        {
            sal_GlyphId pGlyphIds[ 256 ] = {};
            sal_Int32 pWidths[ 256 ];
            sal_uInt8 pEncoding[ 256 ] = {};
            sal_Int32 pEncToUnicodeIndex[ 256 ] = {};
            sal_Int32 pCodeUnitsPerGlyph[ 256 ] = {};
            std::vector<sal_Ucs> aCodeUnits;
            sal_Int32 nToUnicodeStream = 0;
 
            // fill arrays and prepare encoding index map
            auto nGlyphs = fillSubsetArrays(s_subset, pGlyphIds, pWidths, pEncoding, pEncToUnicodeIndex,
                                            pCodeUnitsPerGlyph, aCodeUnits, nToUnicodeStream);
 
            std::vector<sal_uInt8> aBuffer;
            FontSubsetInfo aSubsetInfo;
            const auto* pFace = subset.first;
            if (pFace->CreateFontSubset(aBuffer, pGlyphIds, pEncoding, nGlyphs, aSubsetInfo))
            {
                // create font stream
                if (g_bDebugDisableCompression)
                {
                    emitComment( "PDFWriterImpl::emitFonts" );
                }
                sal_Int32 nFontStream = createObject();
                sal_Int32 nStreamLengthObject = createObject();
                if ( !updateObject( nFontStream ) ) return false;
                aLine.setLength( 0 );
                aLine.append( OString::number(nFontStream)
                    + " 0 obj\n"
                      "<</Length "
                    + OString::number( nStreamLengthObject ) );
                if (!g_bDebugDisableCompression)
                    aLine.append( " 0 R"
                                 "/Filter/FlateDecode"
                                 "/Length1 " );
                else
                    aLine.append( " 0 R"
                                 "/Length1 " );
 
                sal_uInt64 nStartPos = 0;
                if( aSubsetInfo.m_nFontType == FontType::SFNT_TTF )
                {
                    aLine.append( OString::number(static_cast<sal_Int32>(aBuffer.size()))
                               + ">>\n"
                                 "stream\n" );
                    if ( !writeBuffer( aLine ) ) return false;
                    if ( osl::File::E_None != m_aFile.getPos(nStartPos) ) return false;
 
                    // copy font file
                    beginCompression();
                    checkAndEnableStreamEncryption( nFontStream );
                    if (!writeBufferBytes(aBuffer.data(), aBuffer.size()))
                        return false;
                }
                else if( aSubsetInfo.m_nFontType & FontType::CFF_FONT)
                {
                    // TODO: implement
                    OSL_FAIL( "PDFWriterImpl does not support CFF-font subsets yet!" );
                }
                else if( aSubsetInfo.m_nFontType & FontType::TYPE1_PFB) // TODO: also support PFA?
                {
                    // get the PFB-segment lengths
                    ThreeInts aSegmentLengths = {0,0,0};
                    getPfbSegmentLengths(aBuffer.data(), static_cast<int>(aBuffer.size()), aSegmentLengths);
                    // the lengths below are mandatory for PDF-exported Type1 fonts
                    // because the PFB segment headers get stripped! WhyOhWhy.
                    aLine.append( OString::number(static_cast<sal_Int32>(aSegmentLengths[0]) )
                        + "/Length2 "
                        + OString::number( static_cast<sal_Int32>(aSegmentLengths[1]) )
                        + "/Length3 "
                        + OString::number( static_cast<sal_Int32>(aSegmentLengths[2]) )
                        + ">>\n"
                          "stream\n" );
                    if ( !writeBuffer( aLine ) ) return false;
                    if ( osl::File::E_None != m_aFile.getPos(nStartPos) ) return false;
 
                    // emit PFB-sections without section headers
                    beginCompression();
                    checkAndEnableStreamEncryption( nFontStream );
                    if ( !writeBufferBytes( &aBuffer[6], aSegmentLengths[0] ) ) return false;
                    if ( !writeBufferBytes( &aBuffer[12] + aSegmentLengths[0], aSegmentLengths[1] ) ) return false;
                    if ( !writeBufferBytes( &aBuffer[18] + aSegmentLengths[0] + aSegmentLengths[1], aSegmentLengths[2] ) ) return false;
                }
                else
                {
                    SAL_INFO("vcl.pdfwriter", "PDF: CreateFontSubset result in not yet supported format=" << static_cast<int>(aSubsetInfo.m_nFontType));
                    aLine.append( "0 >>\nstream\n" );
                }
 
                endCompression();
                disableStreamEncryption();
 
                sal_uInt64 nEndPos = 0;
                if ( osl::File::E_None != m_aFile.getPos(nEndPos) ) return false;
                // end the stream
                aLine.setLength( 0 );
                aLine.append( "\nendstream\nendobj\n\n" );
                if ( !writeBuffer( aLine ) ) return false;
 
                // emit stream length object
                if ( !updateObject( nStreamLengthObject ) ) return false;
                aLine.setLength( 0 );
                aLine.append( OString::number(nStreamLengthObject)
                    + " 0 obj\n"
                    + OString::number( static_cast<sal_Int64>(nEndPos-nStartPos) )
                    + "\nendobj\n\n" );
                if ( !writeBuffer( aLine ) ) return false;
 
                // write font descriptor
                sal_Int32 nFontDescriptor = emitFontDescriptor( subset.first, aSubsetInfo, s_subset.m_nFontID, nFontStream );
 
                if( nToUnicodeStream )
                    nToUnicodeStream = createToUnicodeCMap( pEncoding, aCodeUnits, pCodeUnitsPerGlyph, pEncToUnicodeIndex, nGlyphs );
 
                sal_Int32 nFontObject = createObject();
                if ( !updateObject( nFontObject ) ) return false;
                aLine.setLength( 0 );
                aLine.append( OString::number(nFontObject) + " 0 obj\n" );
                aLine.append( (aSubsetInfo.m_nFontType & FontType::ANY_TYPE1) ?
                             "<</Type/Font/Subtype/Type1/BaseFont/" :
                             "<</Type/Font/Subtype/TrueType/BaseFont/" );
                appendSubsetName( s_subset.m_nFontID, aSubsetInfo.m_aPSName, aLine );
                aLine.append( "\n"
                             "/FirstChar 0\n"
                             "/LastChar "
                    + OString::number( static_cast<sal_Int32>(nGlyphs-1) )
                    + "\n"
                      "/Widths[" );
                for (auto i = 0u; i < nGlyphs; i++)
                {
                    aLine.append( pWidths[ i ] );
                    aLine.append( ((i & 15) == 15) ? "\n" : " " );
                }
                aLine.append( "]\n"
                             "/FontDescriptor "
                    + OString::number( nFontDescriptor )
                    + " 0 R\n" );
                if( nToUnicodeStream )
                {
                    aLine.append( "/ToUnicode "
                        + OString::number( nToUnicodeStream )
                        + " 0 R\n" );
                }
                aLine.append( ">>\n"
                             "endobj\n\n" );
                if ( !writeBuffer( aLine ) ) return false;
 
                aFontIDToObject[ s_subset.m_nFontID ] = nFontObject;
            }
            else
            {
                OStringBuffer aErrorComment( 256 );
                aErrorComment.append( "CreateFontSubset failed for font \""
                    + OUStringToOString( pFace->GetFamilyName(), RTL_TEXTENCODING_UTF8 )
                    + "\"" );
                if( pFace->GetItalic() == ITALIC_NORMAL )
                    aErrorComment.append( " italic" );
                else if( pFace->GetItalic() == ITALIC_OBLIQUE )
                    aErrorComment.append( " oblique" );
                aErrorComment.append( " weight=" + OString::number( sal_Int32(pFace->GetWeight()) ) );
                emitComment( aErrorComment.getStr() );
            }
        }
    }
 
    // emit system fonts
    for (auto const& systemFont : m_aSystemFonts)
    {
        std::map< sal_Int32, sal_Int32 > aObjects = emitSystemFont( systemFont.first, systemFont.second );
        for (auto const& item : aObjects)
        {
            if ( !item.second ) return false;
            aFontIDToObject[ item.first ] = item.second;
        }
    }
 
    // emit Type3 fonts
    for (auto const& it : m_aType3Fonts)
    {
        if (!emitType3Font(it.first, it.second, aFontIDToObject))
            return false;
    }
 
    OStringBuffer aFontDict( 1024 );
    aFontDict.append( OString::number(getFontDictObject())
        + " 0 obj\n"
          "<<" );
    int ni = 0;
    for (auto const& itemMap : aFontIDToObject)
    {
        aFontDict.append( "/F"
            + OString::number( itemMap.first )
            + " "
            + OString::number( itemMap.second )
            + " 0 R" );
        if( ((++ni) & 7) == 0 )
            aFontDict.append( '\n' );
    }
    // emit builtin font for widget appearances / variable text
    for (auto & item : m_aBuildinFontToObjectMap)
    {
        rtl::Reference<pdf::BuildinFontFace> aData(new pdf::BuildinFontFace(item.first));
        item.second = emitBuildinFont( aData.get(), item.second );
    }
 
    appendBuildinFontsToDict(aFontDict);
    aFontDict.append( "\n>>\nendobj\n\n" );
 
    if ( !updateObject( getFontDictObject() ) ) return false;
    if ( !writeBuffer( aFontDict ) ) return false;
    return true;
}
 
sal_Int32 PDFWriterImpl::emitResources()
{
    // emit shadings
    if( ! m_aGradients.empty() )
        CHECK_RETURN( emitGradients() );
    // emit tilings
    if( ! m_aTilings.empty() )
        CHECK_RETURN( emitTilings() );
 
    // emit font dict
    CHECK_RETURN( emitFonts() );
 
    // emit Resource dict
    OStringBuffer aLine( 512 );
    sal_Int32 nResourceDict = getResourceDictObj();
    CHECK_RETURN( updateObject( nResourceDict ) );
    aLine.setLength( 0 );
    aLine.append( OString::number(nResourceDict)
        + " 0 obj\n" );
    m_aGlobalResourceDict.append( aLine, getFontDictObject() );
    aLine.append( "endobj\n\n" );
    CHECK_RETURN( writeBuffer( aLine ) );
    return nResourceDict;
}
 
sal_Int32 PDFWriterImpl::updateOutlineItemCount( std::vector< sal_Int32 >& rCounts,
                                                 sal_Int32 nItemLevel,
                                                 sal_Int32 nCurrentItemId )
{
    /* The /Count number of an item is
       positive: the number of visible subitems
       negative: the negative number of subitems that will become visible if
                 the item gets opened
       see PDF ref 1.4 p 478
    */
 
    sal_Int32 nCount = 0;
 
    if( m_aContext.OpenBookmarkLevels < 0           || // all levels are visible
        m_aContext.OpenBookmarkLevels >= nItemLevel    // this level is visible
      )
    {
        PDFOutlineEntry& rItem = m_aOutline[ nCurrentItemId ];
        sal_Int32 nChildren = rItem.m_aChildren.size();
        for( sal_Int32 i = 0; i < nChildren; i++ )
            nCount += updateOutlineItemCount( rCounts, nItemLevel+1, rItem.m_aChildren[i] );
        rCounts[nCurrentItemId] = nCount;
        // return 1 (this item) + visible sub items
        if( nCount < 0 )
            nCount = 0;
        nCount++;
    }
    else
    {
        // this bookmark level is invisible
        PDFOutlineEntry& rItem = m_aOutline[ nCurrentItemId ];
        sal_Int32 nChildren = rItem.m_aChildren.size();
        rCounts[ nCurrentItemId ] = -sal_Int32(rItem.m_aChildren.size());
        for( sal_Int32 i = 0; i < nChildren; i++ )
            updateOutlineItemCount( rCounts, nItemLevel+1, rItem.m_aChildren[i] );
        nCount = -1;
    }
 
    return nCount;
}
 
sal_Int32 PDFWriterImpl::emitOutline()
{
    int i, nItems = m_aOutline.size();
 
    // do we have an outline at all ?
    if( nItems < 2 )
        return 0;
 
    // reserve object numbers for all outline items
    for( i = 0; i < nItems; ++i )
        m_aOutline[i].m_nObject = createObject();
 
    // update all parent, next and prev object ids
    for( i = 0; i < nItems; ++i )
    {
        PDFOutlineEntry& rItem = m_aOutline[i];
        int nChildren = rItem.m_aChildren.size();
 
        if( nChildren )
        {
            for( int n = 0; n < nChildren; ++n )
            {
                PDFOutlineEntry& rChild = m_aOutline[ rItem.m_aChildren[n] ];
 
                rChild.m_nParentObject = rItem.m_nObject;
                rChild.m_nPrevObject = (n > 0) ? m_aOutline[ rItem.m_aChildren[n-1] ].m_nObject : 0;
                rChild.m_nNextObject = (n < nChildren-1) ? m_aOutline[ rItem.m_aChildren[n+1] ].m_nObject : 0;
            }
 
        }
    }
 
    // calculate Count entries for all items
    std::vector< sal_Int32 > aCounts( nItems );
    updateOutlineItemCount( aCounts, 0, 0 );
 
    // emit hierarchy
    for( i = 0; i < nItems; ++i )
    {
        PDFOutlineEntry& rItem = m_aOutline[i];
        OStringBuffer aLine( 1024 );
 
        CHECK_RETURN( updateObject( rItem.m_nObject ) );
        aLine.append( OString::number(rItem.m_nObject)
            + " 0 obj\n"
              "<<" );
        // number of visible children (all levels)
        if( i > 0 || aCounts[0] > 0 )
        {
            aLine.append( "/Count " + OString::number( aCounts[i] ) );
        }
        if( ! rItem.m_aChildren.empty() )
        {
            // children list: First, Last
            aLine.append( "/First "
                + OString::number( m_aOutline[rItem.m_aChildren.front()].m_nObject )
                + " 0 R/Last "
                + OString::number( m_aOutline[rItem.m_aChildren.back()].m_nObject )
                + " 0 R\n" );
        }
        if( i > 0 )
        {
            // Title, Dest, Parent, Prev, Next
            aLine.append( "/Title" );
            appendUnicodeTextStringEncrypt( rItem.m_aTitle, rItem.m_nObject, aLine );
            aLine.append( "\n" );
            // Dest is not required
            if( rItem.m_nDestID >= 0 && o3tl::make_unsigned(rItem.m_nDestID) < m_aDests.size() )
            {
                aLine.append( "/Dest" );
                appendDest( rItem.m_nDestID, aLine );
            }
            aLine.append( "/Parent "
                + OString::number( rItem.m_nParentObject )
                + " 0 R" );
            if( rItem.m_nPrevObject )
            {
                aLine.append( "/Prev "
                    + OString::number( rItem.m_nPrevObject )
                    + " 0 R" );
            }
            if( rItem.m_nNextObject )
            {
                aLine.append( "/Next "
                    + OString::number( rItem.m_nNextObject )
                    + " 0 R" );
            }
        }
        aLine.append( ">>\nendobj\n\n" );
        CHECK_RETURN( writeBuffer( aLine ) );
    }
 
    return m_aOutline[0].m_nObject;
}
 
#undef CHECK_RETURN
#define CHECK_RETURN( x ) if( !x ) return false
 
bool PDFWriterImpl::appendDest( sal_Int32 nDestID, OStringBuffer& rBuffer )
{
    if( nDestID < 0 || o3tl::make_unsigned(nDestID) >= m_aDests.size() )
    {
        SAL_INFO("vcl.pdfwriter", "ERROR: invalid dest " << static_cast<int>(nDestID) << " requested");
        return false;
    }
 
    const PDFDest& rDest        = m_aDests[ nDestID ];
    const PDFPage& rDestPage    = m_aPages[ rDest.m_nPage ];
 
    rBuffer.append( '[' );
    rBuffer.append( rDestPage.m_nPageObject );
    rBuffer.append( " 0 R" );
 
    switch( rDest.m_eType )
    {
        case PDFWriter::DestAreaType::XYZ:
        default:
            rBuffer.append( "/XYZ " );
            appendFixedInt( rDest.m_aRect.Left(), rBuffer );
            rBuffer.append( ' ' );
            appendFixedInt( rDest.m_aRect.Bottom(), rBuffer );
            rBuffer.append( " 0" );
            break;
        case PDFWriter::DestAreaType::FitRectangle:
            rBuffer.append( "/FitR " );
            appendFixedInt( rDest.m_aRect.Left(), rBuffer );
            rBuffer.append( ' ' );
            appendFixedInt( rDest.m_aRect.Top(), rBuffer );
            rBuffer.append( ' ' );
            appendFixedInt( rDest.m_aRect.Right(), rBuffer );
            rBuffer.append( ' ' );
            appendFixedInt( rDest.m_aRect.Bottom(), rBuffer );
            break;
    }
    rBuffer.append( ']' );
 
    return true;
}
 
void PDFWriterImpl::addDocumentAttachedFile(OUString const& rFileName, OUString const& rMimeType, OUString const& rDescription, std::unique_ptr<PDFOutputStream> rStream)
{
    sal_Int32 nObjectID = addEmbeddedFile(std::move(rStream), rMimeType);
    auto& rAttachedFile = m_aDocumentAttachedFiles.emplace_back();
    rAttachedFile.maFilename = rFileName;
    rAttachedFile.maMimeType = rMimeType;
    rAttachedFile.maDescription = rDescription;
    rAttachedFile.mnEmbeddedFileObjectId = nObjectID;
    rAttachedFile.mnObjectId = createObject();
}
 
sal_Int32 PDFWriterImpl::addEmbeddedFile(std::unique_ptr<PDFOutputStream> rStream, OUString const& rMimeType)
{
    sal_Int32 aObjectID = createObject();
    auto& rEmbedded = m_aEmbeddedFiles.emplace_back();
    rEmbedded.m_nObject = aObjectID;
    rEmbedded.m_aSubType = rMimeType;
    rEmbedded.m_pStream = std::move(rStream);
    return aObjectID;
}
 
sal_Int32 PDFWriterImpl::addEmbeddedFile(BinaryDataContainer const & rDataContainer)
{
    sal_Int32 aObjectID = createObject();
    m_aEmbeddedFiles.emplace_back();
    m_aEmbeddedFiles.back().m_nObject = aObjectID;
    m_aEmbeddedFiles.back().m_aDataContainer = rDataContainer;
    return aObjectID;
}
 
bool PDFWriterImpl::emitScreenAnnotations()
{
    int nAnnots = m_aScreens.size();
    for (int i = 0; i < nAnnots; i++)
    {
        const PDFScreen& rScreen = m_aScreens[i];
 
        OStringBuffer aLine;
        bool bEmbed = false;
        if (!rScreen.m_aTempFileURL.isEmpty())
        {
            bEmbed = true;
            if (!updateObject(rScreen.m_nTempFileObject))
                continue;
 
            SvFileStream aFileStream(rScreen.m_aTempFileURL, StreamMode::READ);
            SvMemoryStream aMemoryStream;
            aMemoryStream.WriteStream(aFileStream);
 
            aLine.append(rScreen.m_nTempFileObject);
            aLine.append(" 0 obj\n");
            aLine.append("<< /Type /EmbeddedFile /Length ");
            aLine.append(static_cast<sal_Int64>(aMemoryStream.GetSize()));
            aLine.append(" >>\nstream\n");
            CHECK_RETURN(writeBuffer(aLine));
            aLine.setLength(0);
 
            CHECK_RETURN(writeBufferBytes(aMemoryStream.GetData(), aMemoryStream.GetSize()));
 
            aLine.append("\nendstream\nendobj\n\n");
            CHECK_RETURN(writeBuffer(aLine));
            aLine.setLength(0);
        }
 
        if (!updateObject(rScreen.m_nObject))
            continue;
 
        // Annot dictionary.
        aLine.append(OString::number(rScreen.m_nObject)
            + " 0 obj\n"
              "<</Type/Annot"
              "/Subtype/Screen/Rect[");
        appendFixedInt(rScreen.m_aRect.Left(), aLine);
        aLine.append(' ');
        appendFixedInt(rScreen.m_aRect.Top(), aLine);
        aLine.append(' ');
        appendFixedInt(rScreen.m_aRect.Right(), aLine);
        aLine.append(' ');
        appendFixedInt(rScreen.m_aRect.Bottom(), aLine);
        aLine.append("]");
 
        // Action dictionary.
        aLine.append("/A<</Type/Action /S/Rendition /AN "
            + OString::number(rScreen.m_nObject)
            + " 0 R ");
 
        // Rendition dictionary.
        aLine.append("/R<</Type/Rendition /S/MR ");
 
        // MediaClip dictionary.
        aLine.append("/C<</Type/MediaClip /S/MCD ");
        if (bEmbed)
        {
            aLine.append("\n/D << /Type /Filespec /F (<embedded file>) ");
            if (PDFWriter::PDFVersion::PDF_1_7 <= m_aContext.Version)
            {   // ISO 14289-1:2014, Clause: 7.11
                aLine.append("/UF (<embedded file>) ");
            }
            aLine.append("/EF << /F ");
            aLine.append(rScreen.m_nTempFileObject);
            aLine.append(" 0 R >>");
        }
        else
        {
            // Linked.
            aLine.append("\n/D << /Type /Filespec /FS /URL /F ");
            appendLiteralStringEncrypt(rScreen.m_aURL, rScreen.m_nObject, aLine, osl_getThreadTextEncoding());
            if (PDFWriter::PDFVersion::PDF_1_7 <= m_aContext.Version)
            {   // ISO 14289-1:2014, Clause: 7.11
                aLine.append("/UF ");
                appendUnicodeTextStringEncrypt(rScreen.m_aURL, rScreen.m_nObject, aLine);
            }
        }
        if (PDFWriter::PDFVersion::PDF_1_6 <= m_aContext.Version
            && !rScreen.m_AltText.isEmpty())
        {   // ISO 14289-1:2014, Clause: 7.11
            aLine.append("/Desc ");
            appendUnicodeTextStringEncrypt(rScreen.m_AltText, rScreen.m_nObject, aLine);
        }
        aLine.append(" >>\n"); // end of /D
        // Allow playing the video via a tempfile.
        aLine.append("/P <</TF (TEMPACCESS)>>");
        // ISO 14289-1:2014, Clause: 7.18.6.2
        aLine.append("/CT ");
        appendLiteralStringEncrypt(rScreen.m_MimeType, rScreen.m_nObject, aLine);
        // ISO 14289-1:2014, Clause: 7.18.6.2
        // Alt text is a "Multi-language Text Array"
        aLine.append(" /Alt [ () ");
        appendUnicodeTextStringEncrypt(rScreen.m_AltText, rScreen.m_nObject, aLine);
        aLine.append(" ] "
                     ">>");
 
        // End Rendition dictionary by requesting play/pause/stop controls.
        aLine.append("/P<</BE<</C true >>>>"
                     ">>");
 
        // End Action dictionary.
        aLine.append("/OP 0 >>");
 
        if (-1 != rScreen.m_nStructParent)
        {
            aLine.append("\n/StructParent "
                + OString::number(rScreen.m_nStructParent)
                + "\n");
        }
 
        // End Annot dictionary.
        aLine.append("/P "
            + OString::number(m_aPages[rScreen.m_nPage].m_nPageObject)
            + " 0 R\n>>\nendobj\n\n");
        CHECK_RETURN(writeBuffer(aLine));
    }
 
    return true;
}
 
bool PDFWriterImpl::emitLinkAnnotations()
{
    MARK("PDFWriterImpl::emitLinkAnnotations");
    int nAnnots = m_aLinks.size();
    for( int i = 0; i < nAnnots; i++ )
    {
        const PDFLink& rLink            = m_aLinks[i];
        if( ! updateObject( rLink.m_nObject ) )
            continue;
 
        OStringBuffer aLine( 1024 );
        aLine.append( rLink.m_nObject );
        aLine.append( " 0 obj\n" );
// i59651: key /F set bits Print to 1 rest to 0. We don't set NoZoom NoRotate to 1, since it's a 'should'
// see PDF 8.4.2 and ISO 19005-1:2005 6.5.3
        aLine.append( "<</Type/Annot" );
        if( m_bIsPDF_A1 || m_bIsPDF_A2 || m_bIsPDF_A3)
            aLine.append( "/F 4" );
        aLine.append( "/Subtype/Link/Border[0 0 0]/Rect[" );
 
        appendFixedInt( rLink.m_aRect.Left()-7, aLine );//the +7 to have a better shape of the border rectangle
        aLine.append( ' ' );
        appendFixedInt( rLink.m_aRect.Top(), aLine );
        aLine.append( ' ' );
        appendFixedInt( rLink.m_aRect.Right()+7, aLine );//the +7 to have a better shape of the border rectangle
        aLine.append( ' ' );
        appendFixedInt( rLink.m_aRect.Bottom(), aLine );
        aLine.append( "]" );
        // ISO 14289-1:2014, Clause: 7.18.5
        aLine.append("/Contents");
        appendUnicodeTextStringEncrypt(rLink.m_AltText, rLink.m_nObject, aLine);
        if( rLink.m_nDest >= 0 )
        {
            aLine.append( "/Dest" );
            appendDest( rLink.m_nDest, aLine );
        }
        else
        {
/*
destination is external to the document, so
we check in the following sequence:
 
 if target type is neither .pdf, nor .od[tpgs], then
          check if relative or absolute and act accordingly (use URI or 'launch application' as requested)
                             end processing
 else if target is .od[tpgs]: then
      if conversion of type from od[tpgs]  to pdf is requested, convert it and this becomes the new target file
      processing continue
 
 if (new)target is .pdf : then
     if GotToR is requested, then
           convert the target in GoToR where the fragment of the URI is
           considered the named destination in the target file, set relative or absolute as requested
     else strip the fragment from URL and then set URI or 'launch application' as requested
*/
 
// FIXME: check if the decode mechanisms for URL processing throughout this implementation
// are the correct one!!
 
// extract target file type
            auto url(URIHelper::resolveIdnaHost(rLink.m_aURL));
 
            INetURLObject aDocumentURL( m_aContext.BaseURL );
            INetURLObject aTargetURL( url );
            bool bSetGoToRMode = false;
            bool    bTargetHasPDFExtension = false;
            INetProtocol eTargetProtocol = aTargetURL.GetProtocol();
            bool    bIsUNCPath = false;
            bool    bUnparsedURI = false;
 
            // check if the protocol is a known one, or if there is no protocol at all (on target only)
            // if there is no protocol, make the target relative to the current document directory
            // getting the needed URL information from the current document path
            if( eTargetProtocol == INetProtocol::NotValid )
            {
                if( url.getLength() > 4 && url.startsWith("\\\\\\\\"))
                {
                    bIsUNCPath = true;
                }
                else
                {
                    INetURLObject aNewURL(rtl::Uri::convertRelToAbs(
                                                (m_aContext.BaseURL.getLength() > 0 ?
                                                    m_aContext.BaseURL :
                                                    //use dummy location if empty
                                                    u"http://ahost.ax"),
                                                url));
                    aTargetURL = aNewURL; //reassign the new target URL
 
                    //recompute the target protocol, with the new URL
                    //normal URL processing resumes
                    eTargetProtocol = aTargetURL.GetProtocol();
 
                    bUnparsedURI = eTargetProtocol == INetProtocol::NotValid;
                }
            }
 
            OUString aFileExtension = aTargetURL.GetFileExtension();
 
            // Check if the URL ends in '/': if yes it's a directory,
            // it will be forced to a URI link.
            // possibly a malformed URI, leave it as it is, force as URI
            if( aTargetURL.hasFinalSlash() )
                m_aContext.DefaultLinkAction = PDFWriter::URIAction;
 
            if( !aFileExtension.isEmpty() )
            {
                if( m_aContext.ConvertOOoTargetToPDFTarget )
                {
                    bool bChangeFileExtensionToPDF = false;
                    //examine the file type (.odm .odt. .odp, odg, ods)
                    if( aFileExtension.equalsIgnoreAsciiCase( "odm" ) )
                        bChangeFileExtensionToPDF = true;
                    if( aFileExtension.equalsIgnoreAsciiCase( "odt" ) )
                        bChangeFileExtensionToPDF = true;
                    else if( aFileExtension.equalsIgnoreAsciiCase( "odp" ) )
                        bChangeFileExtensionToPDF = true;
                    else if( aFileExtension.equalsIgnoreAsciiCase( "odg" ) )
                        bChangeFileExtensionToPDF = true;
                    else if( aFileExtension.equalsIgnoreAsciiCase( "ods" ) )
                        bChangeFileExtensionToPDF = true;
                    if( bChangeFileExtensionToPDF )
                        aTargetURL.setExtension(u"pdf" );
                }
                //check if extension is pdf, see if GoToR should be forced
                bTargetHasPDFExtension = aTargetURL.GetFileExtension().equalsIgnoreAsciiCase( "pdf" );
                if( m_aContext.ForcePDFAction && bTargetHasPDFExtension )
                    bSetGoToRMode = true;
            }
            //prepare the URL, if relative or not
            INetProtocol eBaseProtocol = aDocumentURL.GetProtocol();
            //queue the string common to all types of actions
            aLine.append( "/A<</Type/Action/S");
            if( bIsUNCPath ) // handle Win UNC paths
            {
                aLine.append( "/Launch/Win<</F" );
                // INetURLObject is not good with UNC paths, use original path
                appendLiteralStringEncrypt( url, rLink.m_nObject, aLine, osl_getThreadTextEncoding() );
                aLine.append( ">>" );
            }
            else
            {
                bool bSetRelative = false;
                bool bFileSpec = false;
                //check if relative file link is requested and if the protocol is 'file://'
                if( m_aContext.RelFsys && eBaseProtocol == eTargetProtocol && eTargetProtocol == INetProtocol::File )
                    bSetRelative = true;
 
                OUString aFragment = aTargetURL.GetMark( INetURLObject::DecodeMechanism::NONE /*DecodeMechanism::WithCharset*/ ); //fragment as is,
                if( !bSetGoToRMode )
                {
                    switch( m_aContext.DefaultLinkAction )
                    {
                    default:
                    case PDFWriter::URIAction :
                    case PDFWriter::URIActionDestination :
                        aLine.append( "/URI/URI" );
                        break;
                    case PDFWriter::LaunchAction:
                        // now:
                        // if a launch action is requested and the hyperlink target has a fragment
                        // and the target file does not have a pdf extension, or it's not a 'file:://'
                        // protocol then force the uri action on it
                        // This code will permit the correct opening of application on web pages,
                        // the one that normally have fragments (but I may be wrong...)
                        // and will force the use of URI when the protocol is not file:
                        if( (!aFragment.isEmpty() && !bTargetHasPDFExtension) ||
                                        eTargetProtocol != INetProtocol::File )
                        {
                            aLine.append( "/URI/URI" );
                        }
                        else
                        {
                            aLine.append( "/Launch/F" );
                            bFileSpec = true;
                        }
                        break;
                    }
                }
 
                //fragment are encoded in the same way as in the named destination processing
                if( bSetGoToRMode )
                {
                    //add the fragment
                    OUString aURLNoMark = aTargetURL.GetURLNoMark( INetURLObject::DecodeMechanism::WithCharset );
                    aLine.append("/GoToR");
                    aLine.append("/F");
                    appendLiteralStringEncrypt( bSetRelative ? INetURLObject::GetRelURL( m_aContext.BaseURL, aURLNoMark,
                                                                                         INetURLObject::EncodeMechanism::WasEncoded,
                                                                                         INetURLObject::DecodeMechanism::WithCharset ) :
                                                                   aURLNoMark, rLink.m_nObject, aLine, osl_getThreadTextEncoding() );
                    if( !aFragment.isEmpty() )
                    {
                        aLine.append("/D/");
                        appendDestinationName( aFragment , aLine );
                    }
                }
                else
                {
                    // change the fragment to accommodate the bookmark (only if the file extension
                    // is PDF and the requested action is of the correct type)
                    if(m_aContext.DefaultLinkAction == PDFWriter::URIActionDestination &&
                               bTargetHasPDFExtension && !aFragment.isEmpty() )
                    {
                        OStringBuffer aLineLoc( 1024 );
                        appendDestinationName( aFragment , aLineLoc );
                        //substitute the fragment
                        aTargetURL.SetMark( OStringToOUString(aLineLoc, RTL_TEXTENCODING_ASCII_US) );
                    }
                    OUString aURL = bUnparsedURI ? url :
                                                   aTargetURL.GetMainURL( bFileSpec ? INetURLObject::DecodeMechanism::WithCharset :
                                                                                      INetURLObject::DecodeMechanism::NONE );
                    appendLiteralStringEncrypt(bSetRelative ? INetURLObject::GetRelURL( m_aContext.BaseURL, aURL,
                                                                                        INetURLObject::EncodeMechanism::WasEncoded,
                                                                                            bFileSpec ? INetURLObject::DecodeMechanism::WithCharset : INetURLObject::DecodeMechanism::NONE
                                                                                            ) :
                                                                               aURL , rLink.m_nObject, aLine, osl_getThreadTextEncoding() );
                }
            }
            aLine.append( ">>\n" );
        }
        if (rLink.m_nStructParent != -1)
        {
            aLine.append( "/StructParent " );
            aLine.append( rLink.m_nStructParent );
        }
        aLine.append( ">>\nendobj\n\n" );
        CHECK_RETURN( writeBuffer( aLine ) );
    }
 
    return true;
}
 
namespace
{
 
void appendAnnotationRect(tools::Rectangle const & rRectangle, OStringBuffer & aLine)
{
    aLine.append("/Rect[");
    appendFixedInt(rRectangle.Left(), aLine);
    aLine.append(' ');
    appendFixedInt(rRectangle.Top(), aLine);
    aLine.append(' ');
    appendFixedInt(rRectangle.Right(), aLine);
    aLine.append(' ');
    appendFixedInt(rRectangle.Bottom(), aLine);
    aLine.append("] ");
}
 
} // end anonymous namespace
 
void PDFWriterImpl::emitTextAnnotationLine(OStringBuffer & aLine, PDFNoteEntry const & rNote)
{
    appendObjectID(rNote.m_nObject, aLine);
 
    aLine.append("<</Type /Annot /Subtype ");
    if (rNote.m_aContents.maPolygons.size() == 1)
    {
        auto const& rPolygon = rNote.m_aContents.maPolygons[0];
        aLine.append(rPolygon.isClosed() ? "/Polygon " : "/Polyline ");
        aLine.append("/Vertices [");
        for (sal_uInt32 i = 0; i < rPolygon.count(); ++i)
        {
            appendDouble(convertMm100ToPoint(rPolygon.getB2DPoint(i).getX()), aLine, nLog10Divisor);
            aLine.append(" ");
            appendDouble(m_aPages[rNote.m_nPage].getHeight()
                             - convertMm100ToPoint(rPolygon.getB2DPoint(i).getY()),
                         aLine, nLog10Divisor);
            aLine.append(" ");
        }
        aLine.append("] ");
        aLine.append("/C [");
        appendColor(rNote.m_aContents.annotColor, aLine, false);
        aLine.append("] ");
        if (rPolygon.isClosed())
        {
            aLine.append("/IC [");
            appendColor(rNote.m_aContents.interiorColor, aLine, false);
            aLine.append("] ");
        }
    }
    else if (rNote.m_aContents.maPolygons.size() > 1)
    {
        aLine.append("/Ink /InkList [");
        for (auto const& rPolygon : rNote.m_aContents.maPolygons)
        {
            aLine.append("[");
            for (sal_uInt32 i = 0; i < rPolygon.count(); ++i)
            {
                appendDouble(convertMm100ToPoint(rPolygon.getB2DPoint(i).getX()), aLine,
                             nLog10Divisor);
                aLine.append(" ");
                appendDouble(m_aPages[rNote.m_nPage].getHeight()
                                 - convertMm100ToPoint(rPolygon.getB2DPoint(i).getY()),
                             aLine, nLog10Divisor);
                aLine.append(" ");
            }
            aLine.append("]");
            aLine.append("/C [");
            appendColor(rNote.m_aContents.annotColor, aLine, false);
            aLine.append("] ");
        }
        aLine.append("] ");
    }
    else if (rNote.m_aContents.isFreeText)
        aLine.append("/FreeText ");
    else
        aLine.append("/Text ");
 
    aLine.append("/BS<</W 0>>");
 
    // i59651: key /F set bits Print to 1 rest to 0. We don't set NoZoom NoRotate to 1, since it's a 'should'
    // see PDF 8.4.2 and ISO 19005-1:2005 6.5.3
    if (m_bIsPDF_A1 || m_bIsPDF_A2 || m_bIsPDF_A3)
        aLine.append("/F 4 ");
 
    appendAnnotationRect(rNote.m_aRect, aLine);
 
    aLine.append("/Popup ");
    appendObjectReference(rNote.m_aPopUpAnnotation.m_nObject, aLine);
 
    auto & rDateTime = rNote.m_aContents.maModificationDate;
 
    aLine.append("/M (");
    appendPdfTimeDate(aLine, rDateTime.Year, rDateTime.Month, rDateTime.Day, rDateTime.Hours, rDateTime.Minutes, rDateTime.Seconds, 0);
    aLine.append(") ");
 
    // contents of the note (type text string)
    aLine.append("/Contents ");
    appendUnicodeTextStringEncrypt(rNote.m_aContents.Contents, rNote.m_nObject, aLine);
    aLine.append("\n");
 
    // optional title
    if (!rNote.m_aContents.Title.isEmpty())
    {
        aLine.append("/T ");
        appendUnicodeTextStringEncrypt(rNote.m_aContents.Title, rNote.m_nObject, aLine);
        aLine.append("\n");
    }
    aLine.append(">>\n");
    aLine.append("endobj\n\n");
}
 
void PDFWriterImpl::emitPopupAnnotationLine(OStringBuffer & aLine, PDFPopupAnnotation const & rPopUp)
{
    appendObjectID(rPopUp.m_nObject, aLine);
    aLine.append("<</Type /Annot /Subtype /Popup ");
    aLine.append("/Parent ");
    appendObjectReference(rPopUp.m_nParentObject, aLine);
    aLine.append(">>\n");
    aLine.append("endobj\n\n");
}
 
bool PDFWriterImpl::emitNoteAnnotations()
{
    // emit note annotations
    int nAnnots = m_aNotes.size();
    for( int i = 0; i < nAnnots; i++ )
    {
        const PDFNoteEntry& rNote = m_aNotes[i];
        const PDFPopupAnnotation& rPopUp = rNote.m_aPopUpAnnotation;
 
        {
            if (!updateObject(rNote.m_nObject))
                return false;
 
            OStringBuffer aLine(1024);
 
            emitTextAnnotationLine(aLine, rNote);
 
            if (!writeBuffer(aLine))
                return false;
        }
 
        {
 
            if (!updateObject(rPopUp.m_nObject))
                return false;
 
            OStringBuffer aLine(1024);
 
            emitPopupAnnotationLine(aLine, rPopUp);
 
            if (!writeBuffer(aLine))
                return false;
        }
    }
    return true;
}
 
Font PDFWriterImpl::replaceFont( const vcl::Font& rControlFont, const vcl::Font&  rAppSetFont )
{
    bool bAdjustSize = false;
 
    Font aFont( rControlFont );
    if( aFont.GetFamilyName().isEmpty() )
    {
        aFont = rAppSetFont;
        if( rControlFont.GetFontHeight() )
            aFont.SetFontSize( Size( 0, rControlFont.GetFontHeight() ) );
        else
            bAdjustSize = true;
        if( rControlFont.GetItalic() != ITALIC_DONTKNOW )
            aFont.SetItalic( rControlFont.GetItalic() );
        if( rControlFont.GetWeight() != WEIGHT_DONTKNOW )
            aFont.SetWeight( rControlFont.GetWeight() );
    }
    else if( ! aFont.GetFontHeight() )
    {
        aFont.SetFontSize( rAppSetFont.GetFontSize() );
        bAdjustSize = true;
    }
    if( bAdjustSize )
    {
        Size aFontSize = aFont.GetFontSize();
        OutputDevice* pDefDev = Application::GetDefaultDevice();
        aFontSize = OutputDevice::LogicToLogic( aFontSize, pDefDev->GetMapMode(), getMapMode() );
        aFont.SetFontSize( aFontSize );
    }
    return aFont;
}
 
sal_Int32 PDFWriterImpl::getBestBuildinFont( const vcl::Font& rFont )
{
    sal_Int32 nBest = 4; // default to Helvetica
 
    if (rFont.GetFamilyType() == FAMILY_ROMAN)
    {
        // Serif: default to Times-Roman.
        nBest = 8;
    }
 
    OUString aFontName( rFont.GetFamilyName() );
    aFontName = aFontName.toAsciiLowerCase();
 
    if( aFontName.indexOf( "times" ) != -1 )
        nBest = 8;
    else if( aFontName.indexOf( "courier" ) != -1 )
        nBest = 0;
    else if( aFontName.indexOf( "dingbats" ) != -1 )
        nBest = 13;
    else if( aFontName.indexOf( "symbol" ) != -1 )
        nBest = 12;
    if( nBest < 12 )
    {
        if( rFont.GetItalic() == ITALIC_OBLIQUE || rFont.GetItalic() == ITALIC_NORMAL )
            nBest += 1;
        if( rFont.GetWeight() > WEIGHT_MEDIUM )
            nBest += 2;
    }
 
    if( m_aBuildinFontToObjectMap.find( nBest ) == m_aBuildinFontToObjectMap.end() )
        m_aBuildinFontToObjectMap[ nBest ] = createObject();
 
    return nBest;
}
 
static const Color& replaceColor( const Color& rCol1, const Color& rCol2 )
{
    return (rCol1 == COL_TRANSPARENT) ? rCol2 : rCol1;
}
 
void PDFWriterImpl::createDefaultPushButtonAppearance( PDFWidget& rButton, const PDFWriter::PushButtonWidget& rWidget )
{
    const StyleSettings& rSettings = m_aWidgetStyleSettings;
 
    // save graphics state
    push( PushFlags::ALL );
 
    // transform relative to control's coordinates since an
    // appearance stream is a form XObject
    // this relies on the m_aRect member of rButton NOT already being transformed
    // to default user space
    if( rWidget.Background || rWidget.Border )
    {
        setLineColor( rWidget.Border ? replaceColor( rWidget.BorderColor, rSettings.GetLightColor() ) : COL_TRANSPARENT );
        setFillColor( rWidget.Background ? replaceColor( rWidget.BackgroundColor, rSettings.GetDialogColor() ) : COL_TRANSPARENT );
        drawRectangle( rWidget.Location );
    }
    // prepare font to use
    Font aFont = replaceFont( rWidget.TextFont, rSettings.GetPushButtonFont() );
    setFont( aFont );
    setTextColor( replaceColor( rWidget.TextColor, rSettings.GetButtonTextColor() ) );
 
    drawText( rButton.m_aRect, rButton.m_aText, rButton.m_nTextStyle );
 
    // create DA string while local mapmode is still in place
    // (that is before endRedirect())
    OStringBuffer aDA( 256 );
    appendNonStrokingColor( replaceColor( rWidget.TextColor, rSettings.GetButtonTextColor() ), aDA );
    Font aDummyFont( "Helvetica", aFont.GetFontSize() );
    sal_Int32 nDummyBuildin = getBestBuildinFont( aDummyFont );
    aDA.append( ' ' );
    aDA.append(pdf::BuildinFontFace::Get(nDummyBuildin).getNameObject());
    aDA.append( ' ' );
    m_aPages[m_nCurrentPage].appendMappedLength( sal_Int32( aFont.GetFontHeight() ), aDA );
    aDA.append( " Tf" );
    rButton.m_aDAString = aDA.makeStringAndClear();
 
    pop();
 
    rButton.m_aAppearances[ "N" ][ "Standard" ] = new SvMemoryStream();
 
    /* seems like a bad hack but at least works in both AR5 and 6:
       we draw the button ourselves and tell AR
       the button would be totally transparent with no text
 
       One would expect that simply setting a normal appearance
       should suffice, but no, as soon as the user actually presses
       the button and an action is tied to it (gasp! a button that
       does something) the appearance gets replaced by some crap that AR
       creates on the fly even if no DA or MK is given. On AR6 at least
       the DA and MK work as expected, but on AR5 this creates a region
       filled with the background color but nor text. Urgh.
    */
    rButton.m_aMKDict = "/BC [] /BG [] /CA";
    rButton.m_aMKDictCAString = "";
}
 
Font PDFWriterImpl::drawFieldBorder( PDFWidget& rIntern,
                                     const PDFWriter::AnyWidget& rWidget,
                                     const StyleSettings& rSettings )
{
    Font aFont = replaceFont( rWidget.TextFont, rSettings.GetFieldFont() );
 
    if( rWidget.Background || rWidget.Border )
    {
        if( rWidget.Border && rWidget.BorderColor == COL_TRANSPARENT )
        {
            sal_Int32 nDelta = GetDPIX() / 500;
            if( nDelta < 1 )
                nDelta = 1;
            setLineColor( COL_TRANSPARENT );
            tools::Rectangle aRect = rIntern.m_aRect;
            setFillColor( rSettings.GetLightBorderColor() );
            drawRectangle( aRect );
            aRect.AdjustLeft(nDelta ); aRect.AdjustTop(nDelta );
            aRect.AdjustRight( -nDelta ); aRect.AdjustBottom( -nDelta );
            setFillColor( rSettings.GetFieldColor() );
            drawRectangle( aRect );
            setFillColor( rSettings.GetLightColor() );
            drawRectangle( tools::Rectangle( Point( aRect.Left(), aRect.Bottom()-nDelta ), aRect.BottomRight() ) );
            drawRectangle( tools::Rectangle( Point( aRect.Right()-nDelta, aRect.Top() ), aRect.BottomRight() ) );
            setFillColor( rSettings.GetDarkShadowColor() );
            drawRectangle( tools::Rectangle( aRect.TopLeft(), Point( aRect.Left()+nDelta, aRect.Bottom() ) ) );
            drawRectangle( tools::Rectangle( aRect.TopLeft(), Point( aRect.Right(), aRect.Top()+nDelta ) ) );
        }
        else
        {
            setLineColor( rWidget.Border ? replaceColor( rWidget.BorderColor, rSettings.GetShadowColor() ) : COL_TRANSPARENT );
            setFillColor( rWidget.Background ? replaceColor( rWidget.BackgroundColor, rSettings.GetFieldColor() ) : COL_TRANSPARENT );
            drawRectangle( rIntern.m_aRect );
        }
 
        if( rWidget.Border )
        {
            // adjust edit area accounting for border
            sal_Int32 nDelta = aFont.GetFontHeight()/4;
            if( nDelta < 1 )
                nDelta = 1;
            rIntern.m_aRect.AdjustLeft(nDelta );
            rIntern.m_aRect.AdjustTop(nDelta );
            rIntern.m_aRect.AdjustRight( -nDelta );
            rIntern.m_aRect.AdjustBottom( -nDelta );
        }
    }
    return aFont;
}
 
void PDFWriterImpl::createDefaultEditAppearance( PDFWidget& rEdit, const PDFWriter::EditWidget& rWidget )
{
    const StyleSettings& rSettings = m_aWidgetStyleSettings;
    SvMemoryStream* pEditStream = new SvMemoryStream( 1024, 1024 );
 
    push( PushFlags::ALL );
 
    // prepare font to use, draw field border
    Font aFont = drawFieldBorder( rEdit, rWidget, rSettings );
    // Get the built-in font which is closest to aFont.
    sal_Int32 nBest = getBestBuildinFont(aFont);
 
    // prepare DA string
    OStringBuffer aDA( 32 );
    appendNonStrokingColor( replaceColor( rWidget.TextColor, rSettings.GetFieldTextColor() ), aDA );
    aDA.append( ' ' );
    aDA.append(pdf::BuildinFontFace::Get(nBest).getNameObject());
 
    OStringBuffer aDR( 32 );
    aDR.append( "/Font " );
    aDR.append( getFontDictObject() );
    aDR.append( " 0 R" );
    rEdit.m_aDRDict = aDR.makeStringAndClear();
    aDA.append( ' ' );
    m_aPages[ m_nCurrentPage ].appendMappedLength( sal_Int32( aFont.GetFontHeight() ), aDA );
    aDA.append( " Tf" );
 
    /*  create an empty appearance stream, let the viewer create
        the appearance at runtime. This is because AR5 seems to
        paint the widget appearance always, and a dynamically created
        appearance on top of it. AR6 is well behaved in that regard, so
        that behaviour seems to be a bug. Anyway this empty appearance
        relies on /NeedAppearances in the AcroForm dictionary set to "true"
     */
    beginRedirect( pEditStream, rEdit.m_aRect );
    writeBuffer( "/Tx BMC\nEMC\n" );
 
    endRedirect();
    pop();
 
    rEdit.m_aAppearances[ "N" ][ "Standard" ] = pEditStream;
 
    rEdit.m_aDAString = aDA.makeStringAndClear();
}
 
void PDFWriterImpl::createDefaultListBoxAppearance( PDFWidget& rBox, const PDFWriter::ListBoxWidget& rWidget )
{
    const StyleSettings& rSettings = m_aWidgetStyleSettings;
    SvMemoryStream* pListBoxStream = new SvMemoryStream( 1024, 1024 );
 
    push( PushFlags::ALL );
 
    // prepare font to use, draw field border
    Font aFont = drawFieldBorder( rBox, rWidget, rSettings );
    sal_Int32 nBest = getSystemFont( aFont );
 
    beginRedirect( pListBoxStream, rBox.m_aRect );
 
    setLineColor( COL_TRANSPARENT );
    setFillColor( replaceColor( rWidget.BackgroundColor, rSettings.GetFieldColor() ) );
    drawRectangle( rBox.m_aRect );
 
    // empty appearance, see createDefaultEditAppearance for reference
    writeBuffer( "/Tx BMC\nEMC\n" );
 
    endRedirect();
    pop();
 
    rBox.m_aAppearances[ "N" ][ "Standard" ] = pListBoxStream;
 
    // prepare DA string
    OStringBuffer aDA( 256 );
    // prepare DA string
    appendNonStrokingColor( replaceColor( rWidget.TextColor, rSettings.GetFieldTextColor() ), aDA );
    aDA.append( ' ' );
    aDA.append( "/F" );
    aDA.append( nBest );
 
    OStringBuffer aDR( 32 );
    aDR.append( "/Font " );
    aDR.append( getFontDictObject() );
    aDR.append( " 0 R" );
    rBox.m_aDRDict = aDR.makeStringAndClear();
    aDA.append( ' ' );
    m_aPages[ m_nCurrentPage ].appendMappedLength( sal_Int32( aFont.GetFontHeight() ), aDA );
    aDA.append( " Tf" );
    rBox.m_aDAString = aDA.makeStringAndClear();
}
 
void PDFWriterImpl::createDefaultCheckBoxAppearance( PDFWidget& rBox, const PDFWriter::CheckBoxWidget& rWidget )
{
    const StyleSettings& rSettings = m_aWidgetStyleSettings;
 
    // save graphics state
    push( PushFlags::ALL );
 
    if( rWidget.Background || rWidget.Border )
    {
        setLineColor( rWidget.Border ? replaceColor( rWidget.BorderColor, rSettings.GetCheckedColor() ) : COL_TRANSPARENT );
        setFillColor( rWidget.Background ? replaceColor( rWidget.BackgroundColor, rSettings.GetFieldColor() ) : COL_TRANSPARENT );
        drawRectangle( rBox.m_aRect );
    }
 
    Font aFont = replaceFont( rWidget.TextFont, rSettings.GetRadioCheckFont() );
    setFont( aFont );
    Size aFontSize = aFont.GetFontSize();
    if( aFontSize.Height() > rBox.m_aRect.GetHeight() )
        aFontSize.setHeight( rBox.m_aRect.GetHeight() );
    sal_Int32 nDelta = aFontSize.Height()/10;
    if( nDelta < 1 )
        nDelta = 1;
 
    tools::Rectangle aCheckRect, aTextRect;
    {
        aCheckRect.SetLeft( rBox.m_aRect.Left() + nDelta );
        aCheckRect.SetTop( rBox.m_aRect.Top() + (rBox.m_aRect.GetHeight()-aFontSize.Height())/2 );
        aCheckRect.SetRight( aCheckRect.Left() + aFontSize.Height() );
        aCheckRect.SetBottom( aCheckRect.Top() + aFontSize.Height() );
 
        // #i74206# handle small controls without text area
        while( aCheckRect.GetWidth() > rBox.m_aRect.GetWidth() && aCheckRect.GetWidth() > nDelta )
        {
            aCheckRect.AdjustRight( -nDelta );
            aCheckRect.AdjustTop(nDelta/2 );
            aCheckRect.AdjustBottom( -(nDelta - (nDelta/2)) );
        }
 
        aTextRect.SetLeft( rBox.m_aRect.Left() + aCheckRect.GetWidth()+5*nDelta );
        aTextRect.SetTop( rBox.m_aRect.Top() );
        aTextRect.SetRight( aTextRect.Left() + rBox.m_aRect.GetWidth() - aCheckRect.GetWidth()-6*nDelta );
        aTextRect.SetBottom( rBox.m_aRect.Bottom() );
    }
    setLineColor( COL_BLACK );
    setFillColor( COL_TRANSPARENT );
    OStringBuffer aLW( 32 );
    aLW.append( "q " );
    m_aPages[m_nCurrentPage].appendMappedLength( nDelta, aLW );
    aLW.append( " w " );
    writeBuffer( aLW );
    drawRectangle( aCheckRect );
    writeBuffer( " Q\n" );
    setTextColor( replaceColor( rWidget.TextColor, rSettings.GetRadioCheckTextColor() ) );
    drawText( aTextRect, rBox.m_aText, rBox.m_nTextStyle );
 
    pop();
 
    OStringBuffer aDA( 256 );
 
    // tdf#93853 don't rely on Zapf (or any other 'standard' font)
    // being present, but our own OpenSymbol - N.B. PDF/A for good
    // reasons require even the standard PS fonts to be embedded!
    Push();
    SetFont( Font( OUString( "OpenSymbol" ), aFont.GetFontSize() ) );
    const LogicalFontInstance* pFontInstance = GetFontInstance();
    const vcl::font::PhysicalFontFace* pFace = pFontInstance->GetFontFace();
    Pop();
 
    // make sure OpenSymbol is embedded, and includes our checkmark
    const sal_Unicode cMark=0x2713;
    const auto nGlyphId = pFontInstance->GetGlyphIndex(cMark);
    const auto nGlyphWidth = pFontInstance->GetGlyphWidth(nGlyphId, false, false);
 
    sal_uInt8 nMappedGlyph;
    sal_Int32 nMappedFontObject;
    registerGlyph(nGlyphId, pFace, pFontInstance, { cMark }, nGlyphWidth, nMappedGlyph, nMappedFontObject);
 
    appendNonStrokingColor( replaceColor( rWidget.TextColor, rSettings.GetRadioCheckTextColor() ), aDA );
    aDA.append( ' ' );
    aDA.append( "/F" );
    aDA.append( nMappedFontObject );
    aDA.append( " 0 Tf" );
 
    OStringBuffer aDR( 32 );
    aDR.append( "/Font " );
    aDR.append( getFontDictObject() );
    aDR.append( " 0 R" );
    rBox.m_aDRDict = aDR.makeStringAndClear();
    rBox.m_aDAString = aDA.makeStringAndClear();
    rBox.m_aMKDict = "/CA";
    rBox.m_aMKDictCAString = "8";
    rBox.m_aRect = aCheckRect;
 
    // create appearance streams
    sal_Int32 nCharXOffset = 1000 - 787; // metrics from OpenSymbol
    nCharXOffset *= aCheckRect.GetHeight();
    nCharXOffset /= 2000;
    sal_Int32 nCharYOffset = 1000 - (820-143); // metrics from Zapf
    nCharYOffset *= aCheckRect.GetHeight();
    nCharYOffset /= 2000;
 
    // write 'checked' appearance stream
    SvMemoryStream* pCheckStream = new SvMemoryStream( 256, 256 );
    beginRedirect( pCheckStream, aCheckRect );
    aDA.append( "/Tx BMC\nq BT\n" );
    appendNonStrokingColor( replaceColor( rWidget.TextColor, rSettings.GetRadioCheckTextColor() ), aDA );
    aDA.append( ' ' );
    aDA.append( "/F" );
    aDA.append( nMappedFontObject );
    aDA.append( ' ' );
    m_aPages[ m_nCurrentPage ].appendMappedLength( sal_Int32( aCheckRect.GetHeight() ), aDA );
    aDA.append( " Tf\n" );
    m_aPages[ m_nCurrentPage ].appendMappedLength( nCharXOffset, aDA );
    aDA.append( " " );
    m_aPages[ m_nCurrentPage ].appendMappedLength( nCharYOffset, aDA );
    aDA.append( " Td <" );
    appendHex( nMappedGlyph, aDA );
    aDA.append( "> Tj\nET\nQ\nEMC\n" );
    writeBuffer( aDA );
    endRedirect();
    rBox.m_aAppearances[ "N" ][ "Yes" ] = pCheckStream;
 
    // write 'unchecked' appearance stream
    SvMemoryStream* pUncheckStream = new SvMemoryStream( 256, 256 );
    beginRedirect( pUncheckStream, aCheckRect );
    writeBuffer( "/Tx BMC\nEMC\n" );
    endRedirect();
    rBox.m_aAppearances[ "N" ][ "Off" ] = pUncheckStream;
}
 
void PDFWriterImpl::createDefaultRadioButtonAppearance( PDFWidget& rBox, const PDFWriter::RadioButtonWidget& rWidget )
{
    const StyleSettings& rSettings = m_aWidgetStyleSettings;
 
    // save graphics state
    push( PushFlags::ALL );
 
    if( rWidget.Background || rWidget.Border )
    {
        setLineColor( rWidget.Border ? replaceColor( rWidget.BorderColor, rSettings.GetCheckedColor() ) : COL_TRANSPARENT );
        setFillColor( rWidget.Background ? replaceColor( rWidget.BackgroundColor, rSettings.GetFieldColor() ) : COL_TRANSPARENT );
        drawRectangle( rBox.m_aRect );
    }
 
    Font aFont = replaceFont( rWidget.TextFont, rSettings.GetRadioCheckFont() );
    setFont( aFont );
    Size aFontSize = aFont.GetFontSize();
    if( aFontSize.Height() > rBox.m_aRect.GetHeight() )
        aFontSize.setHeight( rBox.m_aRect.GetHeight() );
    sal_Int32 nDelta = aFontSize.Height()/10;
    if( nDelta < 1 )
        nDelta = 1;
 
    tools::Rectangle aCheckRect, aTextRect;
    {
        aCheckRect.SetLeft( rBox.m_aRect.Left() + nDelta );
        aCheckRect.SetTop( rBox.m_aRect.Top() + (rBox.m_aRect.GetHeight()-aFontSize.Height())/2 );
        aCheckRect.SetRight( aCheckRect.Left() + aFontSize.Height() );
        aCheckRect.SetBottom( aCheckRect.Top() + aFontSize.Height() );
 
        // #i74206# handle small controls without text area
        while( aCheckRect.GetWidth() > rBox.m_aRect.GetWidth() && aCheckRect.GetWidth() > nDelta )
        {
            aCheckRect.AdjustRight( -nDelta );
            aCheckRect.AdjustTop(nDelta/2 );
            aCheckRect.AdjustBottom( -(nDelta - (nDelta/2)) );
        }
 
        aTextRect.SetLeft( rBox.m_aRect.Left() + aCheckRect.GetWidth()+5*nDelta );
        aTextRect.SetTop( rBox.m_aRect.Top() );
        aTextRect.SetRight( aTextRect.Left() + rBox.m_aRect.GetWidth() - aCheckRect.GetWidth()-6*nDelta );
        aTextRect.SetBottom( rBox.m_aRect.Bottom() );
    }
    setLineColor( COL_BLACK );
    setFillColor( COL_TRANSPARENT );
    OStringBuffer aLW( 32 );
    aLW.append( "q " );
    m_aPages[ m_nCurrentPage ].appendMappedLength( nDelta, aLW );
    aLW.append( " w " );
    writeBuffer( aLW );
    drawEllipse( aCheckRect );
    writeBuffer( " Q\n" );
    setTextColor( replaceColor( rWidget.TextColor, rSettings.GetRadioCheckTextColor() ) );
    drawText( aTextRect, rBox.m_aText, rBox.m_nTextStyle );
 
    pop();
 
    //to encrypt this (el)
    rBox.m_aMKDict = "/CA";
    //after this assignment, to m_aMKDic cannot be added anything
    rBox.m_aMKDictCAString = "l";
 
    rBox.m_aRect = aCheckRect;
 
    // create appearance streams
    push( PushFlags::ALL);
    SvMemoryStream* pCheckStream = new SvMemoryStream( 256, 256 );
 
    beginRedirect( pCheckStream, aCheckRect );
    OStringBuffer aDA( 256 );
    aDA.append( "/Tx BMC\nq BT\n" );
    appendNonStrokingColor( replaceColor( rWidget.TextColor, rSettings.GetRadioCheckTextColor() ), aDA );
    aDA.append( ' ' );
    m_aPages[m_nCurrentPage].appendMappedLength( sal_Int32( aCheckRect.GetHeight() ), aDA );
    aDA.append( " 0 0 Td\nET\nQ\n" );
    writeBuffer( aDA );
    setFillColor( replaceColor( rWidget.TextColor, rSettings.GetRadioCheckTextColor() ) );
    setLineColor( COL_TRANSPARENT );
    aCheckRect.AdjustLeft(3*nDelta );
    aCheckRect.AdjustTop(3*nDelta );
    aCheckRect.AdjustBottom( -(3*nDelta) );
    aCheckRect.AdjustRight( -(3*nDelta) );
    drawEllipse( aCheckRect );
    writeBuffer( "\nEMC\n" );
    endRedirect();
 
    pop();
    rBox.m_aAppearances[ "N" ][ "Yes" ] = pCheckStream;
 
    SvMemoryStream* pUncheckStream = new SvMemoryStream( 256, 256 );
    beginRedirect( pUncheckStream, aCheckRect );
    writeBuffer( "/Tx BMC\nEMC\n" );
    endRedirect();
    rBox.m_aAppearances[ "N" ][ "Off" ] = pUncheckStream;
}
 
bool PDFWriterImpl::emitAppearances( PDFWidget& rWidget, OStringBuffer& rAnnotDict )
{
    // TODO: check and insert default streams
    OString aStandardAppearance;
    switch( rWidget.m_eType )
    {
        case PDFWriter::CheckBox:
            aStandardAppearance = OUStringToOString( rWidget.m_aValue, RTL_TEXTENCODING_ASCII_US );
            break;
        default:
            break;
    }
 
    if( !rWidget.m_aAppearances.empty() )
    {
        rAnnotDict.append( "/AP<<\n" );
        for (auto & dict_item : rWidget.m_aAppearances)
        {
            rAnnotDict.append( "/" );
            rAnnotDict.append( dict_item.first );
            bool bUseSubDict = (dict_item.second.size() > 1);
 
            // PDF/A requires sub-dicts for /FT/Btn objects (clause
            // 6.3.3)
            if( m_bIsPDF_A1 || m_bIsPDF_A2 || m_bIsPDF_A3)
            {
                if( rWidget.m_eType == PDFWriter::RadioButton ||
                    rWidget.m_eType == PDFWriter::CheckBox ||
                    rWidget.m_eType == PDFWriter::PushButton )
                {
                    bUseSubDict = true;
                }
            }
 
            rAnnotDict.append( bUseSubDict ? "<<" : " " );
 
            for (auto const& stream_item : dict_item.second)
            {
                SvMemoryStream* pAppearanceStream = stream_item.second;
                dict_item.second[ stream_item.first ] = nullptr;
 
                bool bDeflate = compressStream( pAppearanceStream );
 
                sal_Int64 nStreamLen = pAppearanceStream->TellEnd();
                pAppearanceStream->Seek( STREAM_SEEK_TO_BEGIN );
                sal_Int32 nObject = createObject();
                CHECK_RETURN( updateObject( nObject ) );
                if (g_bDebugDisableCompression)
                {
                    emitComment( "PDFWriterImpl::emitAppearances" );
                }
                OStringBuffer aLine;
                aLine.append( nObject );
 
                aLine.append( " 0 obj\n"
                              "<</Type/XObject\n"
                              "/Subtype/Form\n"
                              "/BBox[0 0 " );
                appendFixedInt( rWidget.m_aRect.GetWidth()-1, aLine );
                aLine.append( " " );
                appendFixedInt( rWidget.m_aRect.GetHeight()-1, aLine );
                aLine.append( "]\n"
                              "/Resources " );
                aLine.append( getResourceDictObj() );
                aLine.append( " 0 R\n"
                              "/Length " );
                aLine.append( nStreamLen );
                aLine.append( "\n" );
                if( bDeflate )
                    aLine.append( "/Filter/FlateDecode\n" );
                aLine.append( ">>\nstream\n" );
                CHECK_RETURN( writeBuffer( aLine ) );
                checkAndEnableStreamEncryption( nObject );
                CHECK_RETURN( writeBufferBytes( pAppearanceStream->GetData(), nStreamLen ) );
                disableStreamEncryption();
                CHECK_RETURN( writeBuffer( "\nendstream\nendobj\n\n" ) );
 
                if( bUseSubDict )
                {
                    rAnnotDict.append( " /" );
                    rAnnotDict.append( stream_item.first );
                    rAnnotDict.append( " " );
                }
                rAnnotDict.append( nObject );
                rAnnotDict.append( " 0 R" );
 
                delete pAppearanceStream;
            }
 
            rAnnotDict.append( bUseSubDict ? ">>\n" : "\n" );
        }
        rAnnotDict.append( ">>\n" );
        if( !aStandardAppearance.isEmpty() )
        {
            rAnnotDict.append( "/AS /" );
            rAnnotDict.append( aStandardAppearance );
            rAnnotDict.append( "\n" );
        }
    }
 
    return true;
}
 
bool PDFWriterImpl::emitWidgetAnnotations()
{
    ensureUniqueRadioOnValues();
 
    int nAnnots = m_aWidgets.size();
    for( int a = 0; a < nAnnots; a++ )
    {
        PDFWidget& rWidget = m_aWidgets[a];
 
        if( rWidget.m_eType == PDFWriter::CheckBox )
        {
            if ( !rWidget.m_aOnValue.isEmpty() )
            {
                auto app_it = rWidget.m_aAppearances.find( "N" );
                if( app_it != rWidget.m_aAppearances.end() )
                {
                    auto stream_it = app_it->second.find( "Yes" );
                    if( stream_it != app_it->second.end() )
                    {
                        SvMemoryStream* pStream = stream_it->second;
                        app_it->second.erase( stream_it );
                        OStringBuffer aBuf( rWidget.m_aOnValue.getLength()*2 );
                        appendName( rWidget.m_aOnValue, aBuf );
                        (app_it->second)[ aBuf.makeStringAndClear() ] = pStream;
                    }
                    else
                        SAL_INFO("vcl.pdfwriter", "error: CheckBox without \"Yes\" stream" );
                }
            }
 
            if ( !rWidget.m_aOffValue.isEmpty() )
            {
                auto app_it = rWidget.m_aAppearances.find( "N" );
                if( app_it != rWidget.m_aAppearances.end() )
                {
                    auto stream_it = app_it->second.find( "Off" );
                    if( stream_it != app_it->second.end() )
                    {
                        SvMemoryStream* pStream = stream_it->second;
                        app_it->second.erase( stream_it );
                        OStringBuffer aBuf( rWidget.m_aOffValue.getLength()*2 );
                        appendName( rWidget.m_aOffValue, aBuf );
                        (app_it->second)[ aBuf.makeStringAndClear() ] = pStream;
                    }
                    else
                        SAL_INFO("vcl.pdfwriter", "error: CheckBox without \"Off\" stream" );
                }
            }
        }
 
        OStringBuffer aLine( 1024 );
        OStringBuffer aValue( 256 );
        aLine.append( rWidget.m_nObject );
        aLine.append( " 0 obj\n"
                      "<<" );
        if( rWidget.m_eType != PDFWriter::Hierarchy )
        {
            // emit widget annotation only for terminal fields
            if( rWidget.m_aKids.empty() )
            {
                int iRectMargin;
 
                aLine.append( "/Type/Annot/Subtype/Widget/F " );
 
                if (rWidget.m_eType == PDFWriter::Signature)
                {
                    aLine.append( "132\n" ); // Print & Locked
                    iRectMargin = 0;
                }
                else
                {
                    aLine.append( "4\n" );
                    iRectMargin = 1;
                }
 
                if (-1 != rWidget.m_nStructParent)
                {
                    aLine.append("/StructParent ");
                    aLine.append(rWidget.m_nStructParent);
                    aLine.append("\n");
                }
 
                aLine.append("/Rect[" );
                appendFixedInt( rWidget.m_aRect.Left()-iRectMargin, aLine );
                aLine.append( ' ' );
                appendFixedInt( rWidget.m_aRect.Top()+iRectMargin, aLine );
                aLine.append( ' ' );
                appendFixedInt( rWidget.m_aRect.Right()+iRectMargin, aLine );
                aLine.append( ' ' );
                appendFixedInt( rWidget.m_aRect.Bottom()-iRectMargin, aLine );
                aLine.append( "]\n" );
            }
            aLine.append( "/FT/" );
            switch( rWidget.m_eType )
            {
                case PDFWriter::RadioButton:
                case PDFWriter::CheckBox:
                    // for radio buttons only the RadioButton field, not the
                    // CheckBox children should have a value, else acrobat reader
                    // does not always check the right button
                    // of course real check boxes (not belonging to a radio group)
                    // need their values, too
                    if( rWidget.m_eType == PDFWriter::RadioButton || rWidget.m_nRadioGroup < 0 )
                    {
                        aValue.append( "/" );
                        // check for radio group with all buttons unpressed
                        if( rWidget.m_aValue.isEmpty() )
                            aValue.append( "Off" );
                        else
                            appendName( rWidget.m_aValue, aValue );
                    }
                    [[fallthrough]];
                case PDFWriter::PushButton:
                    aLine.append( "Btn" );
                    break;
                case PDFWriter::ListBox:
                    if( rWidget.m_nFlags & 0x200000 ) // multiselect
                    {
                        aValue.append( "[" );
                        for( size_t i = 0; i < rWidget.m_aSelectedEntries.size(); i++ )
                        {
                            sal_Int32 nEntry = rWidget.m_aSelectedEntries[i];
                            if( nEntry >= 0
                                && o3tl::make_unsigned(nEntry) < rWidget.m_aListEntries.size() )
                                appendUnicodeTextStringEncrypt( rWidget.m_aListEntries[ nEntry ], rWidget.m_nObject, aValue );
                        }
                        aValue.append( "]" );
                    }
                    else if( !rWidget.m_aSelectedEntries.empty() &&
                             rWidget.m_aSelectedEntries[0] >= 0 &&
                             o3tl::make_unsigned(rWidget.m_aSelectedEntries[0]) < rWidget.m_aListEntries.size() )
                    {
                        appendUnicodeTextStringEncrypt( rWidget.m_aListEntries[ rWidget.m_aSelectedEntries[0] ], rWidget.m_nObject, aValue );
                    }
                    else
                        appendUnicodeTextStringEncrypt( OUString(), rWidget.m_nObject, aValue );
                    aLine.append( "Ch" );
                    break;
                case PDFWriter::ComboBox:
                    appendUnicodeTextStringEncrypt( rWidget.m_aValue, rWidget.m_nObject, aValue );
                    aLine.append( "Ch" );
                    break;
                case PDFWriter::Edit:
                    aLine.append( "Tx" );
                    appendUnicodeTextStringEncrypt( rWidget.m_aValue, rWidget.m_nObject, aValue );
                    break;
                case PDFWriter::Signature:
                    aLine.append( "Sig" );
                    aValue.append(OUStringToOString(rWidget.m_aValue, RTL_TEXTENCODING_ASCII_US));
                    break;
                case PDFWriter::Hierarchy: // make the compiler happy
                    break;
            }
            aLine.append( "\n" );
            aLine.append( "/P " );
            aLine.append( m_aPages[ rWidget.m_nPage ].m_nPageObject );
            aLine.append( " 0 R\n" );
        }
        if( rWidget.m_nParent )
        {
            aLine.append( "/Parent " );
            aLine.append( rWidget.m_nParent );
            aLine.append( " 0 R\n" );
        }
        if( !rWidget.m_aKids.empty() )
        {
            aLine.append( "/Kids[" );
            for( size_t i = 0; i < rWidget.m_aKids.size(); i++ )
            {
                aLine.append( rWidget.m_aKids[i] );
                aLine.append( " 0 R" );
                aLine.append( ( (i&15) == 15 ) ? "\n" : " " );
            }
            aLine.append( "]\n" );
        }
        if( !rWidget.m_aName.isEmpty() )
        {
            aLine.append( "/T" );
            appendLiteralStringEncrypt( rWidget.m_aName, rWidget.m_nObject, aLine );
            aLine.append( "\n" );
        }
        if (!rWidget.m_aDescription.isEmpty())
        {
            // the alternate field name should be unicode able since it is
            // supposed to be used in UI
            aLine.append( "/TU" );
            appendUnicodeTextStringEncrypt( rWidget.m_aDescription, rWidget.m_nObject, aLine );
            aLine.append( "\n" );
        }
 
        if( rWidget.m_nFlags )
        {
            aLine.append( "/Ff " );
            aLine.append( rWidget.m_nFlags );
            aLine.append( "\n" );
        }
        if( !aValue.isEmpty() )
        {
            OString aVal = aValue.makeStringAndClear();
            aLine.append( "/V " );
            aLine.append( aVal );
            aLine.append( "\n"
                          "/DV " );
            aLine.append( aVal );
            aLine.append( "\n" );
        }
        if( rWidget.m_eType == PDFWriter::ListBox || rWidget.m_eType == PDFWriter::ComboBox )
        {
            sal_Int32 nTI = -1;
            aLine.append( "/Opt[\n" );
            sal_Int32 i = 0;
            for (auto const& entry : rWidget.m_aListEntries)
            {
                appendUnicodeTextStringEncrypt( entry, rWidget.m_nObject, aLine );
                aLine.append( "\n" );
                if( entry == rWidget.m_aValue )
                    nTI = i;
                ++i;
            }
            aLine.append( "]\n" );
            if( nTI > 0 )
            {
                aLine.append( "/TI " );
                aLine.append( nTI );
                aLine.append( "\n" );
                if( rWidget.m_nFlags & 0x200000 ) // Multiselect
                {
                    aLine.append( "/I [" );
                    aLine.append( nTI );
                    aLine.append( "]\n" );
                }
            }
        }
        if( rWidget.m_eType == PDFWriter::Edit )
        {
            if ( rWidget.m_nMaxLen > 0 )
            {
                aLine.append( "/MaxLen " );
                aLine.append( rWidget.m_nMaxLen );
                aLine.append( "\n" );
            }
 
            if ( rWidget.m_nFormat == PDFWriter::Number )
            {
                OString aHexText;
 
                if ( !rWidget.m_aCurrencySymbol.isEmpty() )
                {
                    // Get the hexadecimal code
                    sal_UCS4 cChar = rWidget.m_aCurrencySymbol.iterateCodePoints(&o3tl::temporary(sal_Int32(1)), -1);
                    aHexText = "\\\\u" + OString::number(cChar, 16);
                }
 
                aLine.append("/AA<<\n");
                aLine.append("/F<</JS(AFNumber_Format\\(");
                aLine.append(OString::number(rWidget.m_nDecimalAccuracy));
                aLine.append(", 0, 0, 0, \"");
                aLine.append( aHexText );
                aLine.append("\",");
                aLine.append(OString::boolean(rWidget.m_bPrependCurrencySymbol));
                aLine.append("\\);)");
                aLine.append("/S/JavaScript>>\n");
                aLine.append("/K<</JS(AFNumber_Keystroke\\(");
                aLine.append(OString::number(rWidget.m_nDecimalAccuracy));
                aLine.append(", 0, 0, 0, \"");
                aLine.append( aHexText );
                aLine.append("\",");
                aLine.append(OString::boolean(rWidget.m_bPrependCurrencySymbol));
                aLine.append("\\);)");
                aLine.append("/S/JavaScript>>\n");
                aLine.append(">>\n");
            }
            else if ( rWidget.m_nFormat == PDFWriter::Time )
            {
                aLine.append("/AA<<\n");
                aLine.append("/F<</JS(AFTime_FormatEx\\(\"");
                aLine.append(OUStringToOString(rWidget.m_aTimeFormat, RTL_TEXTENCODING_ASCII_US));
                aLine.append("\"\\);)");
                aLine.append("/S/JavaScript>>\n");
                aLine.append("/K<</JS(AFTime_KeystrokeEx\\(\"");
                aLine.append(OUStringToOString(rWidget.m_aTimeFormat, RTL_TEXTENCODING_ASCII_US));
                aLine.append("\"\\);)");
                aLine.append("/S/JavaScript>>\n");
                aLine.append(">>\n");
            }
            else if ( rWidget.m_nFormat == PDFWriter::Date )
            {
                aLine.append("/AA<<\n");
                aLine.append("/F<</JS(AFDate_FormatEx\\(\"");
                aLine.append(OUStringToOString(rWidget.m_aDateFormat, RTL_TEXTENCODING_ASCII_US));
                aLine.append("\"\\);)");
                aLine.append("/S/JavaScript>>\n");
                aLine.append("/K<</JS(AFDate_KeystrokeEx\\(\"");
                aLine.append(OUStringToOString(rWidget.m_aDateFormat, RTL_TEXTENCODING_ASCII_US));
                aLine.append("\"\\);)");
                aLine.append("/S/JavaScript>>\n");
                aLine.append(">>\n");
            }
        }
        if( rWidget.m_eType == PDFWriter::PushButton )
        {
            if(!m_bIsPDF_A1)
            {
                OStringBuffer aDest;
                if( rWidget.m_nDest != -1 && appendDest( m_aDestinationIdTranslation[ rWidget.m_nDest ], aDest ) )
                {
                    aLine.append( "/AA<</D<</Type/Action/S/GoTo/D " );
                    aLine.append( aDest );
                    aLine.append( ">>>>\n" );
                }
                else if( rWidget.m_aListEntries.empty() )
                {
                    if( !m_bIsPDF_A2 && !m_bIsPDF_A3 )
                    {
                        // create a reset form action
                        aLine.append( "/AA<</D<</Type/Action/S/ResetForm>>>>\n" );
                    }
                }
                else if( rWidget.m_bSubmit )
                {
                    // create a submit form action
                    aLine.append( "/AA<</D<</Type/Action/S/SubmitForm/F" );
                    appendLiteralStringEncrypt( rWidget.m_aListEntries.front(), rWidget.m_nObject, aLine, osl_getThreadTextEncoding() );
                    aLine.append( "/Flags " );
 
                    sal_Int32 nFlags = 0;
                    switch( m_aContext.SubmitFormat )
                    {
                    case PDFWriter::HTML:
                        nFlags |= 4;
                        break;
                    case PDFWriter::XML:
                        nFlags |= 32;
                        break;
                    case PDFWriter::PDF:
                        nFlags |= 256;
                        break;
                    case PDFWriter::FDF:
                    default:
                        break;
                    }
                    if( rWidget.m_bSubmitGet )
                        nFlags |= 8;
                    aLine.append( nFlags );
                    aLine.append( ">>>>\n" );
                }
                else
                {
                    // create a URI action
                    aLine.append( "/AA<</D<</Type/Action/S/URI/URI(" );
                    aLine.append( OUStringToOString( rWidget.m_aListEntries.front(), RTL_TEXTENCODING_ASCII_US ) );
                    aLine.append( ")>>>>\n" );
                }
            }
            else
                m_aErrors.insert( PDFWriter::Warning_FormAction_Omitted_PDFA );
        }
        if( !rWidget.m_aDAString.isEmpty() )
        {
            if( !rWidget.m_aDRDict.isEmpty() )
            {
                aLine.append( "/DR<<" );
                aLine.append( rWidget.m_aDRDict );
                aLine.append( ">>\n" );
            }
            else
            {
                aLine.append( "/DR<</Font<<" );
                appendBuildinFontsToDict( aLine );
                aLine.append( ">>>>\n" );
            }
            aLine.append( "/DA" );
            appendLiteralStringEncrypt( rWidget.m_aDAString, rWidget.m_nObject, aLine );
            aLine.append( "\n" );
            if( rWidget.m_nTextStyle & DrawTextFlags::Center )
                aLine.append( "/Q 1\n" );
            else if( rWidget.m_nTextStyle & DrawTextFlags::Right )
                aLine.append( "/Q 2\n" );
        }
        // appearance characteristics for terminal fields
        // which are supposed to have an appearance constructed
        // by the viewer application
        if( !rWidget.m_aMKDict.isEmpty() )
        {
            aLine.append( "/MK<<" );
            aLine.append( rWidget.m_aMKDict );
            //add the CA string, encrypting it
            appendLiteralStringEncrypt(rWidget.m_aMKDictCAString, rWidget.m_nObject, aLine);
            aLine.append( ">>\n" );
        }