C++ PdfObject::IsName方法代码示例

PDFFont PDFAnalyzer::getFontInfo(PdfObject* fontObj)
{
	PDFFont currFont;
	PdfObject* subtype = fontObj->GetIndirectKey("Subtype");
	if (subtype && subtype->IsName())
	{
		PdfObject* fontDesc = fontObj->GetIndirectKey("FontDescriptor");
		if (subtype->GetName() == "Type1")
			currFont.fontType = F_Type1;
		else if (subtype->GetName() == "MMType1")
			currFont.fontType = F_MMType1;
		else if (subtype->GetName() == "TrueType")
			currFont.fontType = F_TrueType;
		else if (subtype->GetName() == "Type3")
		{
			currFont.fontType = F_Type3;
			currFont.isEmbedded = true;
			fontDesc = NULL;
		}
		else if (subtype->GetName() == "Type0")
		{
			PdfObject* descendantFonts = fontObj->GetIndirectKey("DescendantFonts");
			if (descendantFonts && descendantFonts->IsArray())
			{
				PdfObject descendantFont = descendantFonts->GetArray()[0];
				descendantFont.SetOwner(descendantFonts->GetOwner());
				PdfObject* subtypeDescFont = descendantFont.GetIndirectKey("Subtype");
				fontDesc = descendantFont.MustGetIndirectKey("FontDescriptor");
				if (subtypeDescFont && subtypeDescFont->IsName())
				{
					if (subtypeDescFont->GetName() == "CIDFontType0")
						currFont.fontType = F_CIDFontType0;
					else if (subtypeDescFont->GetName() == "CIDFontType2")
						currFont.fontType = F_CIDFontType2;
				}
			}
		}
		if (fontDesc)
		{
			PdfObject* fontFile = fontDesc->GetIndirectKey("FontFile");
			PdfObject* fontFile2 = fontDesc->GetIndirectKey("FontFile2");
			PdfObject* fontFile3 = fontDesc->GetIndirectKey("FontFile3");
			if (fontFile && fontFile->HasStream())
				currFont.isEmbedded = true;
			if (fontFile2 && fontFile2->HasStream())
				currFont.isEmbedded = true;
			if (fontFile3 && fontFile3->HasStream())
			{
				currFont.isEmbedded = true;
				PdfObject* ff3Subtype = fontFile3->GetIndirectKey("Subtype");
				if (ff3Subtype && ff3Subtype->IsName() && ff3Subtype->GetName() == "OpenType")
					currFont.isOpenType = true;
			}
		}
	}
	return currFont;
}

PDFColorSpace PDFAnalyzer::getCSType(PdfObject* cs)
{
	try {
		// colorspace is either a name or an array
		if (cs && cs->IsName())
		{
			PdfName csName = cs->GetName();
			if (csName == "DeviceGray")
				return CS_DeviceGray;
			else if (csName == "DeviceRGB")
				return CS_DeviceRGB;
			else if (csName == "DeviceCMYK")
				return CS_DeviceCMYK;
		}
		else if (cs && cs->IsArray())
		{
			PdfArray csArr = cs->GetArray();
			PdfObject csTypePdfName = csArr[0];
			if (csTypePdfName.IsName())
			{
				PdfName csTypeName = csTypePdfName.GetName();
				if (csTypeName == "ICCBased")
					return CS_ICCBased;
				else if (csTypeName == "CalGray")
					return CS_CalGray;
				else if (csTypeName == "CalRGB")
					return CS_CalRGB;
				else if (csTypeName == "Lab")
					return CS_Lab;
				else if (csTypeName == "Indexed")
				{
					PdfObject base = cs->GetArray()[1];
					PdfObject* pBase = &base;
					if (base.IsReference())
					{
						pBase = cs->GetOwner()->GetObject(base.GetReference());
					}
					pBase->SetOwner(cs->GetOwner());
					return getCSType(pBase);
				}
				else if (csTypeName == "Separation")
					return CS_Separation;
				else if (csTypeName == "DeviceN")
					return CS_DeviceN;
				else if (csTypeName == "Pattern")
					return CS_Pattern;
			}
		}
	}
	catch (PdfError & e)
	{
		qDebug() << "Error in identifying the color type";
		e.PrintErrorMsg();
		return CS_Unknown;
	}
	return CS_Unknown;
}

    void PDFProcessor::start ()
    {
        int nNum = 0;
        try
        {
            PdfObject*  pObj  = NULL;

            // open document
            qDebug() << "Opening file: " << filename.toStdString().c_str();
            PdfMemDocument document( filename.toStdString().c_str() );

//    	    m_pszOutputDirectory = const_cast<char*>(pszOutput);

            TCIVecObjects it = document.GetObjects().begin();

            while( it != document.GetObjects().end() )
            {
                if( (*it)->IsDictionary() )
                {
                    PdfObject* pObjType = (*it)->GetDictionary().GetKey( PdfName::KeyType );
                    PdfObject* pObjSubType = (*it)->GetDictionary().GetKey( PdfName::KeySubtype );
                    if( ( pObjType && pObjType->IsName() && ( pObjType->GetName().GetName() == "XObject" ) ) ||
                            ( pObjSubType && pObjSubType->IsName() && ( pObjSubType->GetName().GetName() == "Image" ) ) )
                    {
                        pObj = (*it)->GetDictionary().GetKey( PdfName::KeyFilter );
                        if( pObj && pObj->IsArray() && pObj->GetArray().GetSize() == 1 &&
                                pObj->GetArray()[0].IsName() && (pObj->GetArray()[0].GetName().GetName() == "DCTDecode") )
                            pObj = &pObj->GetArray()[0];

                        std::string filterName = pObj->GetName().GetName();
                        bool processed = 0;

                        if( pObj && pObj->IsName() && ( filterName == "DCTDecode" ) )
                        {
                            // The only filter is JPEG -> create a JPEG file
                            qDebug() << "JPG found.\n";
                            processed = true;
                            nNum++;
                        }

                        if( pObj && pObj->IsName() && ( filterName == "JPXDecode" ) )
                        {
                            // The only filter is JPEG -> create a JPEG file
                            qDebug() << "JPG found.\n";
                            processed = true;
                            nNum++;
                        }

                        if( pObj && pObj->IsName() && ( filterName == "FlateDecode" ) )
                        {
                            // The only filter is JPEG -> create a JPEG file
                            qDebug() << "JPG found.\n";
                            processed = true;
                            nNum++;
                        }


                        // else we found something strange, we do not care about it for now.
                        if (processed == false)
                        {
                            qDebug() << "Unknown image type found:" << QString::fromStdString(filterName) << "\n";
                            nNum++;
                        }

                        document.FreeObjectMemory( *it );
                    }
                }

                ++it;
            }


        }
        catch( PdfError & e )
        {
            qDebug() << "Error: An error ocurred during processing the pdf file:" << e.GetError();
            e.PrintErrorMsg();
            return;// e.GetError();
        }

        // TODO: statistics of no of images etc
//      nNum = extractor.GetNumImagesExtracted();

        qDebug() << "Extracted " << nNum << " images successfully from the PDF file.\n";
    }

void PdfMemStream::FlateCompress()
{
    PdfObject*        pObj;
    PdfVariant        vFilter( PdfName("FlateDecode" ) );
    PdfVariant        vFilterList;
    PdfArray          tFilters;

    PdfArray::const_iterator tciFilters;
    
    if( !m_lLength )
        return; // ePdfError_ErrOk

    // TODO: Handle DecodeParms
    if( m_pParent->GetDictionary().HasKey( "Filter" ) )
    {
        pObj = m_pParent->GetIndirectKey( "Filter" );

        if( pObj->IsName() )
        {
            if( pObj->GetName() != "DCTDecode" && pObj->GetName() != "FlateDecode" )
            {
                tFilters.push_back( vFilter );
                tFilters.push_back( *pObj );
            }
        }
        else if( pObj->IsArray() )
        {
            tciFilters = pObj->GetArray().begin();

            while( tciFilters != pObj->GetArray().end() )
            {
                if( (*tciFilters).IsName() )
                {
                    // do not compress DCTDecoded are already FlateDecoded streams again
                    if( (*tciFilters).GetName() == "DCTDecode" || (*tciFilters).GetName() == "FlateDecode" )
                    {
                        return;
                    }
                }

                ++tciFilters;
            }

            tFilters.push_back( vFilter );

            tciFilters = pObj->GetArray().begin();

            while( tciFilters != pObj->GetArray().end() )
            {
                tFilters.push_back( (*tciFilters) );
                
                ++tciFilters;
            }
        }
        else
            return;

        vFilterList = PdfVariant( tFilters );
        m_pParent->GetDictionary().AddKey( "Filter", vFilterList );

        FlateCompressStreamData(); // throws an exception on error
    }
    else
    {
        m_pParent->GetDictionary().AddKey( "Filter", PdfName( "FlateDecode" ) );
        FlateCompressStreamData();
    }
}

void PDFAnalyzer::inspectExtGStateObj(PdfObject* extGStateObj, QList<PDFColorSpace> & usedColorSpaces, bool & hasTransparency, QList<PDFFont> & usedFonts, PDFGraphicState & currGS)
{
	PdfObject* bmObj = extGStateObj->GetIndirectKey("BM");
	if (bmObj && bmObj->IsName())
	{
		currGS.blendModes.clear();
		currGS.blendModes.append(bmObj->GetName().GetEscapedName().c_str());
		if (!(bmObj->GetName() == "Normal" || bmObj->GetName() == "Compatible"))
			hasTransparency = true;
	}
	else if (bmObj && bmObj->IsArray())
	{
		PdfArray arr = bmObj->GetArray();
		currGS.blendModes.clear();
		for(int i=0; i<arr.GetSize(); ++i)
			currGS.blendModes.append(arr[i].GetName().GetEscapedName().c_str());
		if (arr[0].IsName() && !(arr[0].GetName() == "Normal" || arr[0].GetName() == "Compatible"))
			hasTransparency = true;
	}
	PdfObject* caObj = extGStateObj->GetIndirectKey("ca");
	if (caObj && (caObj->IsReal() || caObj->IsNumber()))
	{
		currGS.fillAlphaConstant = caObj->GetReal();
		if (caObj->GetReal() < 1)
			hasTransparency = true;
	}
	PdfObject* cAObj = extGStateObj->GetIndirectKey("CA");
	if (cAObj && (cAObj->IsReal() || cAObj->IsNumber()))
	{
		if (cAObj->GetReal() < 1)
		hasTransparency = true;
	}
	PdfObject* sMaskObj = extGStateObj->GetIndirectKey("SMask");
	if (sMaskObj && !(sMaskObj->IsName() && sMaskObj->GetName() == "None"))
		hasTransparency = true;
	PdfObject* fontObj = extGStateObj->GetIndirectKey("Font");
	if (fontObj && fontObj->IsArray())
	{
		PdfArray arr = fontObj->GetArray();
		if (arr[0].IsReference())
		{
			PdfReference ref = arr[0].GetReference();
			PdfObject* fontObject = m_doc->GetObjects().GetObject(ref);
			if (fontObject)
			{
				PDFFont font = getFontInfo(fontObject);
				usedFonts.append(font);
				currGS.font.first = font;
				currGS.font.second = arr[1].GetReal();
			}

		}
	}
	PdfObject* lwObj = extGStateObj->GetIndirectKey("LW");
	if (lwObj)
		currGS.lineWidth = lwObj->GetReal();
	PdfObject* lcObj = extGStateObj->GetIndirectKey("LC");
	if (lcObj)
		currGS.lineCap = lcObj->GetNumber();
	PdfObject* ljObj = extGStateObj->GetIndirectKey("LJ");
	if (ljObj)
		currGS.lineJoin = ljObj->GetNumber();
	PdfObject* mlObj = extGStateObj->GetIndirectKey("ML");
	if (mlObj)
		currGS.miterLimit = mlObj->GetReal();
	PdfObject* dObj = extGStateObj->GetIndirectKey("D");
	if (dObj)
	{
		PdfArray dashArr = dObj->GetArray()[0];
		currGS.dashPattern.first.clear();
		for (int i=0; i<dashArr.GetSize(); ++i)
			currGS.dashPattern.first.append(dashArr[i].GetNumber());
		currGS.dashPattern.second = dObj->GetArray()[1].GetNumber();
	}
}

//.........这里部分代码省略.........
					if (!usedColorSpaces.contains(CS_DeviceRGB))
						usedColorSpaces.append(CS_DeviceRGB);
					currGS.fillCS = CS_DeviceRGB;
					currGS.fillColor.clear();
					for (int i=0; i<args.size(); ++i)
						currGS.fillColor.append(args[i].GetReal());
					break;
				case KW_RG:
					if (!usedColorSpaces.contains(CS_DeviceRGB))
						usedColorSpaces.append(CS_DeviceRGB);
					currGS.strokeCS = CS_DeviceRGB;
					currGS.strokeColor.clear();
					for (int i=0; i<args.size(); ++i)
						currGS.strokeColor.append(args[i].GetReal());
					break;
				case KW_k:
					if (!usedColorSpaces.contains(CS_DeviceCMYK))
						usedColorSpaces.append(CS_DeviceCMYK);
					currGS.fillCS = CS_DeviceCMYK;
					currGS.fillColor.clear();
					for (int i=0; i<args.size(); ++i)
						currGS.fillColor.append(args[i].GetReal());
					break;
				case KW_K:
					if (!usedColorSpaces.contains(CS_DeviceCMYK))
						usedColorSpaces.append(CS_DeviceCMYK);
					currGS.strokeCS = CS_DeviceCMYK;
					currGS.strokeColor.clear();
					for (int i=0; i<args.size(); ++i)
						currGS.strokeColor.append(args[i].GetReal());
					break;
				case KW_cs:
					{
					if (args.size() == 1 && args[0].IsName())
					{
						if (args[0].GetName() == "DeviceGray")
						{
							currGS.fillCS = CS_DeviceGray;
							currGS.fillColor.clear();
							currGS.fillColor.append(0);
							if (!usedColorSpaces.contains(CS_DeviceGray))
								usedColorSpaces.append(CS_DeviceGray);
						}
						else if (args[0].GetName() == "DeviceRGB")
						{
							currGS.fillCS = CS_DeviceRGB;
							currGS.fillColor.clear();
							for (int i=0; i<3; ++i)
								currGS.fillColor.append(0);
							if (!usedColorSpaces.contains(CS_DeviceRGB))
								usedColorSpaces.append(CS_DeviceRGB);
						}
						else if (args[0].GetName() == "DeviceCMYK")
						{
							currGS.fillCS = CS_DeviceCMYK;
							currGS.fillColor.clear();
							for (int i=0; i<3; ++i)
								currGS.fillColor.append(0);
							currGS.fillColor.append(1);
							if (!usedColorSpaces.contains(CS_DeviceCMYK))
								usedColorSpaces.append(CS_DeviceCMYK);
						}
						else if (args[0].GetName() == "Pattern")
						{
							currGS.fillCS = CS_Pattern;
							if (!usedColorSpaces.contains(CS_Pattern))

void PdfParser::ReadXRefStreamContents( pdf_long lOffset, bool bReadOnlyTrailer )
{
    char*       pBuffer;
    char*       pStart;
    pdf_long        lBufferLen;
    long long        lSize     = 0;
    PdfVariant  vWArray;
    PdfObject*  pObj;

    long        nW[W_ARRAY_SIZE] = { 0, 0, 0 };
    int         i;

    m_device.Device()->Seek( lOffset );

    PdfParserObject xrefObject( m_vecObjects, m_device, m_buffer );
    // Ignore the encryption in the XREF as the XREF stream must no be encrypted (see PDF Reference 3.4.7)
    xrefObject.ParseFile( NULL );

    if( !xrefObject.GetDictionary().HasKey( PdfName::KeyType ) )
    {
        PODOFO_RAISE_ERROR( ePdfError_NoXRef );
    }

    pObj = xrefObject.GetDictionary().GetKey( PdfName::KeyType );
    if( !pObj->IsName() || ( pObj->GetName() != "XRef" ) )
    {
        PODOFO_RAISE_ERROR( ePdfError_NoXRef );
    }

    if( !m_pTrailer )
        m_pTrailer = new PdfParserObject( m_vecObjects, m_device, m_buffer );

    MergeTrailer( &xrefObject );

    if( bReadOnlyTrailer )
        return;

    if( !xrefObject.GetDictionary().HasKey( PdfName::KeySize ) || !xrefObject.GetDictionary().HasKey( "W" ) )
    {
        PODOFO_RAISE_ERROR( ePdfError_NoXRef );
    }

    lSize   = xrefObject.GetDictionary().GetKeyAsLong( PdfName::KeySize, 0 );
    vWArray = *(xrefObject.GetDictionary().GetKey( "W" ));

    // The pdf reference states that W is always an array with 3 entries
    // all of them have to be integeres
    if( !vWArray.IsArray() || vWArray.GetArray().size() != 3 )
    {
        PODOFO_RAISE_ERROR( ePdfError_NoXRef );
    }

    for( i=0;i<W_ARRAY_SIZE;i++ )
    {
        if( !vWArray.GetArray()[i].IsNumber() )
        {
            PODOFO_RAISE_ERROR( ePdfError_NoXRef );
        }

        nW[i] = static_cast<long>(vWArray.GetArray()[i].GetNumber());
    }

    std::vector<long long> vecIndeces;
    // get the first object number in this crossref stream.
    // it is not required to have an index key though.
    if( xrefObject.GetDictionary().HasKey( "Index" ) )
    {
        // reuse vWArray!!
        vWArray = *(xrefObject.GetDictionary().GetKey( "Index" ));
        if( !vWArray.IsArray() )
        {
            PODOFO_RAISE_ERROR( ePdfError_NoXRef );
        }

        TCIVariantList it = vWArray.GetArray().begin();
        while ( it != vWArray.GetArray().end() )
        {
            vecIndeces.push_back( (*it).GetNumber() );
            ++it;
        }
    }
    else
    {
        vecIndeces.push_back( 0 );
        vecIndeces.push_back( lSize );
    }

    if( vecIndeces.size() % 2 )
    {
        PODOFO_RAISE_ERROR( ePdfError_NoXRef );
    }

    if( !xrefObject.HasStreamToParse() )
    {
        PODOFO_RAISE_ERROR( ePdfError_NoXRef );
    }

    xrefObject.GetStream()->GetFilteredCopy( &pBuffer, &lBufferLen );

    pStart        = pBuffer;
//.........这里部分代码省略.........