Parsing VmtxTable fails for C:\Windows\Fonts\msyi.ttf about truetype HOT 6 CLOSED

It looks like it also happens in C:\Windows\Fonts\simsunb.ttf, all other fonts I have installed seem fine. Both are Chinese fonts so maybe its an issue with top->bottom fonts?.

Note that I've just pushed a new version to master, that highlights this issue better.

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After adding sanity checks that compares the expected table length and the actual table length there are problems in a lot of fonts. A similar issue occurs in the HmtxTable table.

I suspect the counters are maybe wrong: VheaTable.NumberOfVMetrics, HheaTable.NumberOfHMetrics and MaxpTable.NumGlyphs. At the moment I'm a bit at a loss though. They seem to be read at the correct table offset and in the correct format. Will investigate more later.

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I found the problem: I used the FontReader.Seek method which seeks from the beginning of the file to skip over reserved space.

https://github.com/roy-t/TrueType/blob/master/RoyT.TrueType/Tables/HheaTable.cs#L28

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Ah yes it uses this.BaseStream.Seek(offset, SeekOrigin.Begin); feel free to add an overload to FontReader.Seek that does a relative seek :)

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Can be closed now. Thanks for the support :-)

Also, readme still states netstandard 1.6 instead of 2.0

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