[XeTeX] Devanagari ASCII to Unicode mapping

[Daniel Greenhoe]

Many many thanks to everyone who took the time to help me out with the
Devanagari ASCII to unicode problem (including one very helpful
off-list email). And many many many apologies for my very late reply
(I started a new job earlier this week).

I think the conclusion is that I was going about the problem the wrong
way---that there is no one-to-one mapping between the Devanagari ASCII
font and unicode font. Rather, it is many-to-one.

The SIL resources were very helpful. They have a teckit map there for
Preeti to unicode (as indicated by Lorna). I have not actually tried
it yet; but there is a good chance that it will work or will work with
small modification.

Many many thanks to all,
Dan



On Wed, Feb 21, 2018 at 10:34 PM, Lorna Evans <lorna_evans at sil.org> wrote:
> I think this is a TECkit converter for the Preeti font:
>
> https://github.com/silnrsi/wsresources/tree/master/scripts/Deva/legacy/sag-preeti/mappings
>
> Lorna
>
>
> -------- Original Message --------
> Subject: Re: [XeTeX] Devanagari ASCII to Unicode mapping
> From: ShreeDevi Kumar <shreeshrii at gmail.com>
> To: XeTeX (Unicode-based TeX) discussion. <xetex at tug.org>
> Date: 2/17/2018 11:11 AM
>
> Please see
>
> view-source:http://hindi-fonts.com/tools/Preeti-to-Unicode-Converter
>
> There is no direct mapping, but  array_one has the ASCII codes for Preeti,
> while array_two has the corresponding unicode.
>
> ShreeDevi
> ____________________________________________________________
> भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com
>
> On Sat, Feb 17, 2018 at 10:32 PM, ShreeDevi Kumar <shreeshrii at gmail.com>
> wrote:
>>
>> > What I think I am looking for is something that would map a document
>> typeset using something like the Devanagari Preeti font
>> (https://fonts2u.com/preeti.font), which seems to have the Devanagari
>> glyphs encoded in the range 0x00-0x7F, to something like the
>> Devanagari unicode font Mukta
>> (https://ektype.in/scripts/devanagari/mukta.html) in the range
>> 0x0900-0x097F.
>>
>> Please try http://www.ashesh.com.np/preeti-unicode/
>>
>> Also see
>>
>> https://github.com/Shuvayatra/preeti
>>
>> ShreeDevi
>> ____________________________________________________________
>> भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com
>>
>> On Sat, Feb 17, 2018 at 10:27 PM, Mike Maxwell <maxwell at umiacs.umd.edu>
>> wrote:
>>>
>>> On 2/17/2018 11:08 AM, Daniel Greenhoe wrote:
>>>>
>>>> Does anyone know where I can find an ASCII to Unicode mapping for
>>>> Devanagari?
>>>>
>>>> For example, it seems that the Devanagari  glyph "ब" is encoded as
>>>> 0x61 (hex) in ASCII (lower case 'a' for the Latin alphabet), but is
>>>> 0x092C in the Unicode standard:
>>>>    http://www.unicode.org/charts/PDF/U0900.pdf
>>>>
>>>> So what I am asking for is a map (or table) that maps 0x00-0x7F in
>>>> Devanagari ASCII to 0x0900-0x097F in Unicode.
>>>
>>>
>>> In addition to the ASCII-to-Devanagari transcription system that Philip
>>> Taylor mentioned, you may be interested in the ISCII encoding for
>>> Brahmi-derived writing systems, including Devanagari:
>>>
>>>
>>> https://en.wikipedia.org/wiki/Indian_Script_Code_for_Information_Interchange
>>>
>>> This is _not_ an ASCII-to-Devanagari encoding, rather it leaves the ASCII
>>> range intact, and encodes Devanagari (etc.) in the range 128 (actually,
>>> 161)-255.  It was afaik never widely used, but there were (and probably
>>> still are) fonts for it.  I don't imagine those fonts would be terribly high
>>> quality by today's standards, e.g. I'd be surprised if they handled conjunct
>>> characters.
>>>
>>> FWIW, there was a similar encoding called TSCII for Tamil.
>>>
>>> iconv can be used to map TSCII to other encodings, but for some reason it
>>> doesn't seem to have ISCII in its reportoire (it does include VISCII, but
>>> that's a legacy Vietnamese encoding).
>>> --
>>>    Mike Maxwell
>>>    "My definition of an interesting universe is
>>>    one that has the capacity to study itself."
>>>          --Stephen Eastmond
>>>
>>>
>>>
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