private static TrueTypeNameRecord GetTrueTypeNameRecord(NameRecordBuilder nameRecord, TrueTypeDataBytes data, uint offset)
{
try
{
var encoding = OtherEncodings.Iso88591;
switch (nameRecord.PlatformId)
{
case TrueTypePlatformIdentifier.Windows:
{
var platformEncoding = (TrueTypeWindowsEncodingIdentifier)nameRecord.PlatformEncodingId;
if (platformEncoding == TrueTypeWindowsEncodingIdentifier.Symbol ||
platformEncoding == TrueTypeWindowsEncodingIdentifier.UnicodeBmp)
{
encoding = Encoding.BigEndianUnicode;
}
break;
}
case TrueTypePlatformIdentifier.Unicode:
{
encoding = Encoding.BigEndianUnicode;
break;
}
case TrueTypePlatformIdentifier.Iso:
{
switch (nameRecord.PlatformEncodingId)
{
case 0:
encoding = Encoding.GetEncoding("US-ASCII");
break;
case 1:
encoding = Encoding.GetEncoding("ISO-10646-UCS-2");
break;
}
break;
}
}
var position = offset + nameRecord.Offset;
if (position >= data.Length)
{
return(null);
}
data.Seek(position);
if (data.TryReadString(nameRecord.Length, encoding, out var str))
{
return(nameRecord.ToNameRecord(str));
}
// Damaged font
return(null);
}
catch
{
return(null);
}
}
private static string[] GetFormat2GlyphNames(TrueTypeDataBytes data)
{
const int reservedIndexStart = 32768;
var numberOfGlyphs = data.ReadUnsignedShort();
var glyphNameIndex = new int[numberOfGlyphs];
var glyphNames = new string[numberOfGlyphs];
var maxIndex = int.MinValue;
for (var i = 0; i < numberOfGlyphs; i++)
{
var index = data.ReadUnsignedShort();
glyphNameIndex[i] = index;
if (index < reservedIndexStart)
{
maxIndex = Math.Max(maxIndex, index);
}
}
var nameArray = default(string[]);
if (maxIndex >= WindowsGlyphList4.NumberOfMacGlyphs)
{
var namesLength = maxIndex - WindowsGlyphList4.NumberOfMacGlyphs + 1;
nameArray = new string[namesLength];
for (var i = 0; i < namesLength; i++)
{
var numberOfCharacters = data.ReadByte();
if (data.TryReadString(numberOfCharacters, Encoding.UTF8, out var str))
{
nameArray[i] = str;
}
}
}
for (int i = 0; i < numberOfGlyphs; i++)
{
var index = glyphNameIndex[i];
if (index < WindowsGlyphList4.NumberOfMacGlyphs)
{
glyphNames[i] = WindowsGlyphList4.MacGlyphNames[index];
}
else if (index >= WindowsGlyphList4.NumberOfMacGlyphs && index < reservedIndexStart)
{
if (nameArray == null)
{
throw new InvalidOperationException("The name array was null despite the number of glyphs exceeding the maximum Mac Glyphs.");
}
glyphNames[i] = nameArray[index - WindowsGlyphList4.NumberOfMacGlyphs];
}
else
{
glyphNames[i] = ".undefined";
}
}
return(glyphNames);
}