/// <summary>
/// Adds one of the Standard 14 fonts which are included by default in PDF programs so that pages in this document can use it. These Standard 14 fonts are old and possibly obsolete.
/// </summary>
/// <param name="type">The type of the Standard 14 font to use.</param>
/// <returns>An identifier which can be passed to <see cref="PdfPageBuilder.AddText"/>.</returns>
public AddedFont AddStandard14Font(Standard14Font type)
{
var id = Guid.NewGuid();
var name = NameToken.Create($"F{fonts.Count}");
var added = new AddedFont(id, name);
fonts[id] = new FontStored(added, new Standard14WritingFont(Standard14.GetAdobeFontMetrics(type)));
return(added);
}
public IFont Generate(DictionaryToken dictionary, bool isLenientParsing)
{
var usingStandard14Only = !dictionary.ContainsKey(NameToken.FirstChar) || !dictionary.ContainsKey(NameToken.Widths);
if (usingStandard14Only)
{
// TODO: some fonts combine standard 14 font with other metrics.
if (!dictionary.TryGet(NameToken.BaseFont, out var baseFontToken) ||
!(baseFontToken is NameToken standard14Name))
{
throw new InvalidFontFormatException($"The Type 1 font did not contain a first character entry but also did not reference a standard 14 font: {dictionary}");
}
var metrics = Standard14.GetAdobeFontMetrics(standard14Name.Data);
return(new Type1Standard14Font(metrics));
}
var firstCharacter = FontDictionaryAccessHelper.GetFirstCharacter(dictionary);
var lastCharacter = FontDictionaryAccessHelper.GetLastCharacter(dictionary);
var widths = FontDictionaryAccessHelper.GetWidths(pdfScanner, dictionary, isLenientParsing);
var descriptor = FontDictionaryAccessHelper.GetFontDescriptor(pdfScanner, fontDescriptorFactory, dictionary, isLenientParsing);
var font = ParseType1Font(descriptor, isLenientParsing);
var name = FontDictionaryAccessHelper.GetName(pdfScanner, dictionary, descriptor, isLenientParsing);
CMap toUnicodeCMap = null;
if (dictionary.TryGet(NameToken.ToUnicode, out var toUnicodeObj))
{
var toUnicode = DirectObjectFinder.Get <StreamToken>(toUnicodeObj, pdfScanner);
var decodedUnicodeCMap = toUnicode?.Decode(filterProvider);
if (decodedUnicodeCMap != null)
{
toUnicodeCMap = cMapCache.Parse(new ByteArrayInputBytes(decodedUnicodeCMap), isLenientParsing);
}
}
Encoding encoding = encodingReader.Read(dictionary, isLenientParsing, descriptor);
if (encoding == null && font?.Encoding.Count > 0)
{
encoding = new BuiltInEncoding(font.Encoding);
}
return(new Type1FontSimple(name, firstCharacter, lastCharacter, widths, descriptor, encoding, toUnicodeCMap));
}
/// <summary>
/// Adds one of the Standard 14 fonts which are included by default in PDF programs so that pages in this document can use it. These Standard 14 fonts are old and possibly obsolete.
/// </summary>
/// <param name="type">The type of the Standard 14 font to use.</param>
/// <returns>An identifier which can be passed to <see cref="PdfPageBuilder.AddText"/>.</returns>
public AddedFont AddStandard14Font(Standard14Font type)
{
if (ArchiveStandard != PdfAStandard.None)
{
throw new NotSupportedException($"PDF/A {ArchiveStandard} requires the font to be embedded in the file, only {nameof(AddTrueTypeFont)} is supported.");
}
var id = Guid.NewGuid();
var name = NameToken.Create($"F{fontId++}");
var added = new AddedFont(id, context.ReserveObjectNumber());
fonts[id] = new FontStored(added, new Standard14WritingFont(Standard14.GetAdobeFontMetrics(type)));
return(added);
}
public IFont Generate(DictionaryToken dictionary, bool isLenientParsing)
{
if (!dictionary.TryGetOptionalTokenDirect(NameToken.FirstChar, pdfScanner, out NumericToken firstCharacterToken) ||
!dictionary.TryGet <IToken>(NameToken.FontDescriptor, pdfScanner, out _) ||
!dictionary.TryGet(NameToken.Widths, out IToken _))
{
if (!dictionary.TryGetOptionalTokenDirect(NameToken.BaseFont, pdfScanner, out NameToken baseFont))
{
throw new InvalidFontFormatException($"The provided TrueType font dictionary did not contain a /FirstChar or a /BaseFont entry: {dictionary}.");
}
// Can use the AFM descriptor despite not being Type 1!
var standard14Font = Standard14.GetAdobeFontMetrics(baseFont.Data);
if (standard14Font == null)
{
throw new InvalidFontFormatException($"The provided TrueType font dictionary did not have a /FirstChar and did not match a Standard 14 font: {dictionary}.");
}
var fileSystemFont = systemFontFinder.GetTrueTypeFont(baseFont.Data);
var thisEncoding = encodingReader.Read(dictionary, isLenientParsing);
if (thisEncoding == null)
{
thisEncoding = new AdobeFontMetricsEncoding(standard14Font);
}
int? firstChar = null;
double[] widthsOverride = null;
if (dictionary.TryGet(NameToken.FirstChar, pdfScanner, out firstCharacterToken))
{
firstChar = firstCharacterToken.Int;
}
if (dictionary.TryGet(NameToken.Widths, pdfScanner, out ArrayToken widthsArray))
{
widthsOverride = widthsArray.Data.OfType <NumericToken>()
.Select(x => x.Double).ToArray();
}
return(new TrueTypeStandard14FallbackSimpleFont(baseFont, standard14Font, thisEncoding, fileSystemFont,
new TrueTypeStandard14FallbackSimpleFont.MetricOverrides(firstChar, widthsOverride)));
}
var firstCharacter = firstCharacterToken.Int;
var widths = FontDictionaryAccessHelper.GetWidths(pdfScanner, dictionary, isLenientParsing);
var descriptor = FontDictionaryAccessHelper.GetFontDescriptor(pdfScanner, fontDescriptorFactory, dictionary, isLenientParsing);
var font = ParseTrueTypeFont(descriptor, out var actualHandler);
if (font == null && actualHandler != null)
{
return(actualHandler.Generate(dictionary, isLenientParsing));
}
var name = FontDictionaryAccessHelper.GetName(pdfScanner, dictionary, descriptor, isLenientParsing);
CMap toUnicodeCMap = null;
if (dictionary.TryGet(NameToken.ToUnicode, out var toUnicodeObj))
{
var toUnicode = DirectObjectFinder.Get <StreamToken>(toUnicodeObj, pdfScanner);
var decodedUnicodeCMap = toUnicode.Decode(filterProvider);
if (decodedUnicodeCMap != null)
{
toUnicodeCMap = CMapCache.Parse(new ByteArrayInputBytes(decodedUnicodeCMap), isLenientParsing);
}
}
Encoding encoding = encodingReader.Read(dictionary, isLenientParsing, descriptor);
if (encoding == null && font?.TableRegister?.CMapTable != null &&
font.TableRegister.PostScriptTable?.GlyphNames != null)
{
var postscript = font.TableRegister.PostScriptTable;
// Synthesize an encoding
var fakeEncoding = new Dictionary <int, string>();
for (var i = 0; i < 256; i++)
{
if (font.TableRegister.CMapTable.TryGetGlyphIndex(i, out var index))
{
string glyphName;
if (index >= 0 && index < postscript.GlyphNames.Count)
{
glyphName = postscript.GlyphNames[index];
}
else
{
glyphName = index.ToString();
}
fakeEncoding[i] = glyphName;
}
}
encoding = new BuiltInEncoding(fakeEncoding);
}
return(new TrueTypeSimpleFont(name, descriptor, toUnicodeCMap, encoding, font, firstCharacter, widths));
}
public IFont Generate(DictionaryToken dictionary)
{
var usingStandard14Only = !dictionary.ContainsKey(NameToken.FirstChar) || !dictionary.ContainsKey(NameToken.Widths);
if (usingStandard14Only)
{
// TODO: some fonts combine standard 14 font with other metrics.
if (!dictionary.TryGet(NameToken.BaseFont, out var baseFontToken) ||
!(baseFontToken is NameToken standard14Name))
{
throw new InvalidFontFormatException($"The Type 1 font did not contain a first character entry but also did not reference a standard 14 font: {dictionary}");
}
var metrics = Standard14.GetAdobeFontMetrics(standard14Name.Data);
if (metrics != null)
{
var overrideEncoding = encodingReader.Read(dictionary);
return(new Type1Standard14Font(metrics, overrideEncoding));
}
}
int firstCharacter, lastCharacter;
double[] widths;
if (!usingStandard14Only)
{
firstCharacter = FontDictionaryAccessHelper.GetFirstCharacter(dictionary);
lastCharacter = FontDictionaryAccessHelper.GetLastCharacter(dictionary);
widths = FontDictionaryAccessHelper.GetWidths(pdfScanner, dictionary);
}
else
{
firstCharacter = 0;
lastCharacter = 0;
widths = EmptyArray <double> .Instance;
}
if (!dictionary.TryGet(NameToken.FontDescriptor, out var _))
{
if (dictionary.TryGet(NameToken.BaseFont, out var baseFontToken) &&
DirectObjectFinder.TryGet(baseFontToken, pdfScanner, out NameToken baseFontName))
{
var metrics = Standard14.GetAdobeFontMetrics(baseFontName.Data);
var overrideEncoding = encodingReader.Read(dictionary);
return(new Type1Standard14Font(metrics, overrideEncoding));
}
}
var descriptor = FontDictionaryAccessHelper.GetFontDescriptor(pdfScanner, dictionary);
var font = ParseFontProgram(descriptor);
var name = FontDictionaryAccessHelper.GetName(pdfScanner, dictionary, descriptor);
CMap toUnicodeCMap = null;
if (dictionary.TryGet(NameToken.ToUnicode, out var toUnicodeObj))
{
var toUnicode = DirectObjectFinder.Get <StreamToken>(toUnicodeObj, pdfScanner);
var decodedUnicodeCMap = toUnicode?.Decode(filterProvider, pdfScanner);
if (decodedUnicodeCMap != null)
{
toUnicodeCMap = CMapCache.Parse(new ByteArrayInputBytes(decodedUnicodeCMap));
}
}
var fromFont = default(Encoding);
if (font != null)
{
if (font.TryGetFirst(out var t1Font))
{
fromFont = t1Font.Encoding != null ? new BuiltInEncoding(t1Font.Encoding) : default(Encoding);
}
else if (font.TryGetSecond(out var cffFont))
{
fromFont = cffFont.FirstFont?.Encoding;
}
}
var encoding = encodingReader.Read(dictionary, descriptor, fromFont);
if (encoding == null && font != null && font.TryGetFirst(out var t1FontReplacment))
{
encoding = new BuiltInEncoding(t1FontReplacment.Encoding);
}
return(new Type1FontSimple(name, firstCharacter, lastCharacter, widths, descriptor, encoding, toUnicodeCMap, font));
}