Font-Validator
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HinTak
Font Validator is a tool for testing fonts prior to release. This testing ensures that fonts meet Microsoft's high quality standards and perform exceptionally well on Microsoft's platform.
When validating a cmap 4 subtable, (a) idDelta is a signed short ranging from -32768 to 32767, and (b) the [spec](https://docs.microsoft.com/en-us/typography/opentype/spec/cmap) says that > The idDelta arithmetic is modulo 65536....
Hello! : ) When Font Validator tests a variable font, it sometimes produces false-positive warnings for Device table values. Variable fonts [may repurpose Device tables as VariationIndex tables](https://learn.microsoft.com/en-us/typography/opentype/spec/chapter2#devVarIdxTbls), for which...
See https://github.com/microsoft/Font-Validator/issues/53#issuecomment-1454920798 Likely 5.10 or 5.12. Note to self.
`ReverseChainSubst.GetMaxContextLength` calculates the length as `this.BacktrackGlyphCount + this.LookaheadGlyphCount`. Other lookup types add the lengths of their input sequences, so should this method add 1? Why does it add the backtrack...
I appreciate fontVal’s message that a given report is complete (https://github.com/HinTak/Font-Validator/blob/master/FontValidator/CmdLineInterface.cs#L80). However (in my case), it would be more useful if the output would actually report the html file (not...
These are currently ignored, but equivalent functionality exists in FreeType, via FT_SetLCDfilter() and friends.
Is there any plans to support checking for `CFF2` fonts according to [Microsoft OpenType Documentation](https://docs.microsoft.com/en-us/typography/opentype/spec/cff2)?
