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itfoundry / hind-kochi

A Malayalam font.
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Wrong ligature rule for ന്റ #4

Closed santhoshtr closed 9 years ago

santhoshtr commented 9 years ago

ന്റ(nta) = ന + ് + റ.

Currently it uses chillu n +ra which is the sequence for ന്‍റ - pronounced as in Henry.

lianghai commented 9 years ago

I get what you mean here. But, just in case in the future: given the messy situation of fonts for Malayalam (all these fonts have different behaviors), please use images when you need to clearly explain a structure, or, as I personally perfer, explain a strucure with unambiguous description of glyphs (eg, glyph sequence <Chillu N, below-base mark RRA>).

So, about this <chillu N, below-base mark RRA> problem:

Currently in Hind Kochi, two character sequences are supported:

  1. <Chillu N, Virama, RRA> — this is specified by the Unicode Standard, as you might know. But this sequence is not supported by either Windows or OS X's text engine yet.
  2. <NA, Virama, ZWJ, RRA> — this is an alternative sequence that is compatible with Nirmala UI, which ensures Windows users can see glyph sequence <chillu N, below-base mark RRA> in text they input with Nirmala UI. I know this character sequence doesn't make sense, but it's provided to ensure compatibility. — However, because character sequence <NA, Virama, ZWJ> is also the legacy way of encoding Chillu N, to people who use the legacy Chillu sequences the font produces wrong structure for a character sequence (<NA, Virama, ZWJ, RRA>) that is meant to show glyph sequence <Chillu N, RRA> (side-by-side).

As for the character sequence <NA, Virama, RRA> you requested, yes, I did considered it. I shall add it to the font's OTL rules so the font provides another (and reasonable) fallback support that is common in the open source community.

lianghai commented 9 years ago

Hi @santhoshtr, in the latest build I have disabled the Nirmala-compatible rule (maybe only temporarily) and enabled the rule you requested.