public CidFontFactory(IPdfTokenScanner pdfScanner, FontDescriptorFactory descriptorFactory,
IFilterProvider filterProvider)
{
this.pdfScanner = pdfScanner;
this.descriptorFactory = descriptorFactory;
this.filterProvider = filterProvider;
}
public ICidFont Generate(DictionaryToken dictionary)
{
var type = dictionary.GetNameOrDefault(NameToken.Type);
if (!NameToken.Font.Equals(type))
{
throw new InvalidFontFormatException($"Expected \'Font\' dictionary but found \'{type}\'");
}
var widths = ReadWidths(dictionary);
var defaultWidth = default(double?);
if (dictionary.TryGet(NameToken.Dw, pdfScanner, out NumericToken defaultWidthToken))
{
defaultWidth = defaultWidthToken.Double;
}
var verticalWritingMetrics = ReadVerticalDisplacements(dictionary);
FontDescriptor descriptor = null;
if (TryGetFontDescriptor(dictionary, out var descriptorDictionary))
{
descriptor = FontDescriptorFactory.Generate(descriptorDictionary, pdfScanner);
}
var fontProgram = ReadDescriptorFile(descriptor);
var baseFont = dictionary.GetNameOrDefault(NameToken.BaseFont);
var systemInfo = GetSystemInfo(dictionary);
var subType = dictionary.GetNameOrDefault(NameToken.Subtype);
if (NameToken.CidFontType0.Equals(subType))
{
return(new Type0CidFont(fontProgram, type, subType, baseFont, systemInfo, descriptor, verticalWritingMetrics, widths, defaultWidth));
}
if (NameToken.CidFontType2.Equals(subType))
{
var cidToGid = GetCharacterIdentifierToGlyphIndexMap(dictionary);
return(new Type2CidFont(type, subType, baseFont, systemInfo, descriptor, fontProgram, verticalWritingMetrics, widths, defaultWidth, cidToGid));
}
return(null);
}
