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 ?
http://www.microsoft.com/typography/OpenTypeDev/malayalam/intro.htm says:
...
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/.
....
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