Implement additional ligated conjuncts

[pathumego]

[EDITED]

12 ligated conjuncts are already included in Abhaya Libre. Some of them are common and few are rare. Few sources [1] [2] [3] have confirmed that the following combinations are ligated in certain Pali and Sanskrit texts. 5–8 needs further confirmation and more sources. We have to look at original sources and research before designing typographic forms.

  | GLYPH | NON-LIGATED | PHONETIC | CODE POINT SEQUENCE | Notes -- | -- | -- | -- | -- | -- 1 | ඤ්‍ච | ඤ්ච | ny.ca | 0DA4 nya, 0DCA al-lakuna, 200D ZWJ, 0DA0 ca | (DONE 5b47d93) Typographic form is Ca with Sannyaka stroke. DONE 5b47d93 2 | ඤ්‍ඡ | ඤ්ඡ | ny.cha | 0DA4 nya, 0DCA al-lakuna, 200D ZWJ, 0DA1 cha | (DONE 5b47d93) Typographic form is Cha with Sannyaka stroke 3 | ච්‍ච | ච්ච | c.ca | 0DA0 ca, 0DCA al-lakuna, 200D ZWJ, 0DA0 ca | (DONE 8103767dbd841e902dcc73fcd57c6eafb13a44c4 )(Pali Chayanna - පාලි චයන්න) #58 4 | බ්‍බ | බ්බ | b.ba | 0DB6 ba, 0DCA al-lakuna, 200D ZWJ, 0DB6 ba | (DONE 5b47d93) Sabba Bayanna - සබ්බ බයන්න #54 5 | ණ්‍ඩ | ණ්ඩ | nn.dda | 0DAB nna, 0DCA al-lakuna, 200D ZWJ, 0DA9 dda | (DONE 5b47d93) Typographic form is ඬ 6 | ඤ්‍ජ | ඤ්ජ | ny.ja | 0DA4 nya, 0DCA al-lakuna, 200D ZWJ, 0DA2 ja | (DONE 5b47d93) Typographic form is ඦ 7 | ම්‍බ | ම්බ | mb.ba | 0DB8 ma, 0DCA al-lakuna, 200D ZWJ, 0DB6 ba | (DONE 5b47d93) Typographic form is ඹ 8 | ඞ්‍ග | ඞ්ග | ng.ga | 0D9E nga, 0DCA al-lakuna, 200D ZWJ, 0D9C ga | (DONE 5b47d93) Typographic form is ඟ)

Tracking these on this spreadsheet.

These should be implemented with the same strategy used to invoke (<al-lakuna, ZWJ>) the existing ligated conjuncts.

Additionally it would be nice to implement a OpenType stylistic set feature so users can invoke these ligatures even if the text is not encoded to ligate the conjuncts. Tracking this here >> #56

---

[1] Page 57 from තියඩෝර් ජී ගුරුන්නාන්සේගේ ව්‍යාකරණ පොත >> (TODO Get the title page and exact details)

[2] @pathnirvana provided this image in #39 taken from Buddha Jayanthi Tipitaka. But this identifies the above 1.

[3] https://pitaka.lk/tools/unicode/pali_bandi.htm#id-UN-Abhaya

[pathnirvana]

This second page was taken from the Buddha jayanthi tipitaka. I have implemented most of these conjuncts in the un-xxx fonts

On Fri, May 28, 2021, 11:13 AM Pathum Egodawatta @.***> wrote:

[EDITED]

12 ligated conjuncts are already included in Abhaya Libre. Some of them are common and few are rare. Few sources [1] [2] [3] have confirmed that the following combinations are ligated in certain Pali manuscripts. 5–8 needs further confirmation and more sources. We have to look at original sources and research before designing typographic forms.

1.

• ඤ්‍ච 2.
• ඤ්‍ඡ 3.
• ච්ච ( Pali Chayanna - පාලි චයන්න) 4.
• බ්බ (Sabba Bayanna - සබ්බ බයන්න) #54 https://github.com/mooniak/abhaya-libre-font/issues/54 5.
• ණ්ඩ (form is ඬ) 6.
• ඤ්ජ (form is ඦ) 7.
• ම්බ (form is ඹ) 8.
• ඞ්ග (form is ඟ)

These should be implemented with the same strategy used to invoke (<al-lakuna, ZWJ>) the existing ligated conjuncts. Additionally it would be nice to implement a OpenType stylistic set https://docs.microsoft.com/en-us/typography/opentype/spec/features_pt#tag-ss01---ss20 feature so users can invoke these ligatures even if the text is not encoded to ligate the conjuncts.

[1] Page 57 from තියඩෝර් ජී ගුරුන්නාන්සේගේ ව්‍යාකරණ පොත >> (TODO Get the title page and exact details)

[image: 186544430_1536103543447664_3854911375201684958_n] https://user-images.githubusercontent.com/6846609/119914855-d7aa9f80-bf7e-11eb-9ce8-b83d83d167b0.jpeg

[2] @pathnirvana https://github.com/pathnirvana provided this image in

39 https://github.com/mooniak/abhaya-libre-font/issues/39 I am not

certain which book this is taken from. But this identifies the above 1. [image: bf70c95e-f3a9-11e5-9697-939b23d62638] https://user-images.githubusercontent.com/6846609/119928287-ea31d280-bf98-11eb-9d84-952d778c3787.jpeg

[2] https://pitaka.lk/tools/unicode/pali_bandi.htm#id-UN-Abhaya

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/mooniak/abhaya-libre-font/issues/52, or unsubscribe https://github.com/notifications/unsubscribe-auth/AEKAID25E6W7EMMH7W3IXX3TP4J5DANCNFSM45RTWUBA .

[pathumego]

@pathnirvana Yes! I am aware of the UN fonts. We want to make sure Abhaya Libre supports all needed ligatures for Pali, including the edge cases and rare ligatures. If you see anything to add here please do. Would love to have you onboard for testing.

[bgliyanage]

For providing solid evidence for numbers 5 and 8, I hereby add photos of an ola leaf book. Photo courtesy to venerable Sangha of Peliyagoda Vidyalankara Pirivena. Here someone can see, කුම්භණ්ඩ and මඞ්ගල.

[pathumego]

@bgliyanage provided a list of words for each conjunct for testing purposes. Uploaded here

[pathumego]

@bgliyanage @JanakaCB Please take a look >> abhaya_libre_ligated_conjuncts.pdf

[bgliyanage]

Great job, Pathum. Now the reformation is 90% complete. Still we need to consider designing ච්ච conjunct and making three or more glyph conjuncts. Best wishes to all.

[pathumego]

All these conjuncts are added. There is one more we are tracking in #61. Not including in this list as we might use a different strategy to encode it.