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support named tounicode cmaps rather than streams type 0 fonts

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tounicode cmap may refer to a known cmap name rather than an embedded cmap stream.
This commit is contained in:
Eliot Jones
2020-01-14 14:58:20 +00:00
parent a36f5a3af3
commit f6e12f40d8
1 changed files with 15 additions and 6 deletions
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15
src/UglyToad.PdfPig/PdfFonts/Parser/Handlers/Type0FontHandler.cs
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@@ -64,15 +64,24 @@
{ {
var toUnicodeValue = dictionary.Data[NameToken.ToUnicode]; var toUnicodeValue = dictionary.Data[NameToken.ToUnicode];
var toUnicode = DirectObjectFinder.Get<StreamToken>(toUnicodeValue, scanner); if (DirectObjectFinder.TryGet<StreamToken>(toUnicodeValue, scanner, out var toUnicodeStream))
{
var decodedUnicodeCMap = toUnicode?.Decode(filterProvider); var decodedUnicodeCMap = toUnicodeStream?.Decode(filterProvider);
if (decodedUnicodeCMap != null) if (decodedUnicodeCMap != null)
{ {
toUnicodeCMap = CMapCache.Parse(new ByteArrayInputBytes(decodedUnicodeCMap), isLenientParsing); toUnicodeCMap = CMapCache.Parse(new ByteArrayInputBytes(decodedUnicodeCMap), isLenientParsing);
} }
} }
else if (DirectObjectFinder.TryGet<NameToken>(toUnicodeValue, scanner, out var toUnicodeName))
{
toUnicodeCMap = CMapCache.Get(toUnicodeName.Data);
}
else
{
throw new PdfDocumentFormatException($"Invalid type of toUnicode CMap encountered. Got: {toUnicodeValue}.");
}
}
var font = new Type0Font(baseFont, cidFont, cMap, toUnicodeCMap, ucs2CMap, isChineseJapaneseOrKorean); var font = new Type0Font(baseFont, cidFont, cMap, toUnicodeCMap, ucs2CMap, isChineseJapaneseOrKorean);