[HarfBuzz] Contextual shaping of Malayalam post(pre)/below base forms
sureshp at gmx.com
Thu Jun 13 04:57:56 PDT 2013
Behdad Esfahbod wrote:
> On 13-06-11 07:29 AM, Suresh P wrote:
>> I want to know whether it is possible to prevent pref and blwf rules being
>> applied using contextual rules
> The engine doesn't do anything specific for blwf, so whatever you put in your
> (contextual) lookup is what happens. pref is different since the engine does
> reordering. But it only does the reordering if the virama,consonant have
> ligated. So, again, yes, you can block the reordering using a contextual lookup.
But I find the ligation(for pref and blwf) always happen irrespective of
the rules in the contextual lookup. The reordering issue does not arise
at all. I want to block ligation via pref and blwf entirely for certain
base consonants without any syllable breaking exercise. Is that possible ?
Note that a font may be implemented to re-order a Ra to pre-base
position only in certain syllables and display it as a below-base or
post-base form otherwise. This means that the Pre-base-form
classification is not mutually exclusive with either Below-base-form or
Post-base-form classifications. However, /all classifications are
determined as described above using context-free substitutions/.
More information about the HarfBuzz