/// <summary>
/// Creates a character indexed font from <i>cidFont</i>
/// </summary>
/// <remarks>
/// The <i>font</i> and <i>cidFont</i> will be different object
/// references since the <i>font</i> parameter will most likely
/// be a <see cref="ProxyFont"/>.
/// </remarks>
/// <param name="pdfFontID">The Pdf font identifier, e.g. F15</param>
/// <param name="font">Required to access the font descriptor.</param>
/// <param name="cidFont">The underlying CID font.</param>
/// <returns></returns>
private PdfFont CreateCIDFont(
string pdfFontID, Font font, CIDFont cidFont)
{
// The font descriptor is required to access licensing details are
// obtain the font program itself as a byte array
IFontDescriptor descriptor = font.Descriptor;
// A compressed stream that stores the font program
PdfFontFile fontFile = new PdfFontFile(
NextObjectId(), descriptor.FontData);
// Add indirect reference to FontFile object to descriptor
PdfFontDescriptor pdfDescriptor = MakeFontDescriptor(pdfFontID, cidFont);
pdfDescriptor.FontFile2 = fontFile;
PdfCIDSystemInfo pdfCidSystemInfo = new PdfCIDSystemInfo(
cidFont.Registry, cidFont.Ordering, cidFont.Supplement);
PdfCIDFont pdfCidFont = new PdfCIDFont(
NextObjectId(), PdfFontSubTypeEnum.CIDFontType2, font.FontName);
pdfCidFont.SystemInfo = pdfCidSystemInfo;
pdfCidFont.Descriptor = pdfDescriptor;
pdfCidFont.DefaultWidth = new PdfNumeric(cidFont.DefaultWidth);
pdfCidFont.Widths = cidFont.WArray;
// Create a ToUnicode CMap that maps characters codes (GIDs) to
// unicode values. Very important to ensure searching and copying
// from a PDF document works correctly.
PdfCMap pdfCMap = new PdfCMap(NextObjectId());
pdfCMap.AddFilter(new FlateFilter());
pdfCMap.SystemInfo = pdfCidSystemInfo;
pdfCMap.AddBfRanges(cidFont.CMapEntries);
// Create a PDF object to represent the CID font
PdfType0Font pdfFont = new PdfType0Font(
NextObjectId(), pdfFontID, font.FontName);
pdfFont.Encoding = new PdfName(cidFont.Encoding);
pdfFont.Descendant = pdfCidFont;
pdfFont.ToUnicode = pdfCMap;
// Add all the Pdf objects to the document. MakeFont will add the actual
// PdfFont object to the document.
creator.AddObject(pdfDescriptor);
creator.AddObject(pdfCidFont);
creator.AddObject(pdfCMap);
creator.AddObject(fontFile);
return(pdfFont);
}
/// <summary>
/// Creates a character indexed font from <i>cidFont</i>
/// </summary>
/// <remarks>
/// The <i>font</i> and <i>cidFont</i> will be different object
/// references since the <i>font</i> parameter will most likely
/// be a <see cref="ProxyFont"/>.
/// </remarks>
/// <param name="pdfFontID">The Pdf font identifier, e.g. F15</param>
/// <param name="font">Required to access the font descriptor.</param>
/// <param name="cidFont">The underlying CID font.</param>
/// <returns></returns>
private PdfFont CreateCIDFont(
string pdfFontID, Font font, CIDFont cidFont)
{
// The font descriptor is required to access licensing details are
// obtain the font program itself as a byte array
IFontDescriptor descriptor = font.Descriptor;
// A compressed stream that stores the font program
PdfFontFile fontFile = new PdfFontFile(
NextObjectId(), descriptor.FontData);
// Add indirect reference to FontFile object to descriptor
PdfFontDescriptor pdfDescriptor = MakeFontDescriptor(pdfFontID, cidFont);
pdfDescriptor.FontFile2 = fontFile;
PdfCIDSystemInfo pdfCidSystemInfo = new PdfCIDSystemInfo(
cidFont.Registry, cidFont.Ordering, cidFont.Supplement);
PdfCIDFont pdfCidFont = new PdfCIDFont(
NextObjectId(), PdfFontSubTypeEnum.CIDFontType2, font.FontName);
pdfCidFont.SystemInfo = pdfCidSystemInfo;
pdfCidFont.Descriptor = pdfDescriptor;
pdfCidFont.DefaultWidth = new PdfNumeric(cidFont.DefaultWidth);
pdfCidFont.Widths = cidFont.WArray;
// Create a ToUnicode CMap that maps characters codes (GIDs) to
// unicode values. Very important to ensure searching and copying
// from a PDF document works correctly.
PdfCMap pdfCMap = new PdfCMap(NextObjectId());
pdfCMap.AddFilter(new FlateFilter());
pdfCMap.SystemInfo = pdfCidSystemInfo;
pdfCMap.AddBfRanges(cidFont.CMapEntries);
// Create a PDF object to represent the CID font
PdfType0Font pdfFont = new PdfType0Font(
NextObjectId(), pdfFontID, font.FontName);
pdfFont.Encoding = new PdfName(cidFont.Encoding);
pdfFont.Descendant = pdfCidFont;
pdfFont.ToUnicode = pdfCMap;
// Add all the Pdf objects to the document. MakeFont will add the actual
// PdfFont object to the document.
creator.AddObject(pdfDescriptor);
creator.AddObject(pdfCidFont);
creator.AddObject(pdfCMap);
creator.AddObject(fontFile);
return pdfFont;
}
