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#444 handle invalid tounicode map objects in tt fonts

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This commit is contained in:
Eliot Jones 2022-05-02 16:17:05 -04:00
parent 03692cf42f
commit 4e490d63be
1 changed files with 15 additions and 8 deletions
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19
src/UglyToad.PdfPig/PdfFonts/Parser/Handlers/TrueTypeFontHandler.cs
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@ -107,13 +107,20 @@
CMap toUnicodeCMap = null; CMap toUnicodeCMap = null;
if (dictionary.TryGet(NameToken.ToUnicode, out var toUnicodeObj)) if (dictionary.TryGet(NameToken.ToUnicode, out var toUnicodeObj))
{ {
var toUnicode = DirectObjectFinder.Get<StreamToken>(toUnicodeObj, pdfScanner); try
var decodedUnicodeCMap = toUnicode.Decode(filterProvider, pdfScanner);
if (decodedUnicodeCMap != null)
{ {
toUnicodeCMap = CMapCache.Parse(new ByteArrayInputBytes(decodedUnicodeCMap)); var toUnicode = DirectObjectFinder.Get<StreamToken>(toUnicodeObj, pdfScanner);
var decodedUnicodeCMap = toUnicode.Decode(filterProvider, pdfScanner);
if (decodedUnicodeCMap != null)
{
toUnicodeCMap = CMapCache.Parse(new ByteArrayInputBytes(decodedUnicodeCMap));
}
}
catch (Exception ex)
{
log.Error("Failed to decode ToUnicode CMap for a TrueType font in file due to an exception.", ex);
} }
} }