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Summary: Request to add Lohit Tamil Classical with old Tamil ligatures of -aa and -ai https://bugzilla.redhat.com/show_bug.cgi?id=795327 Summary: Request to add Lohit Tamil Classical with old Tamil ligatures of -aa and -ai Product: Fedora Version: rawhide Platform: Unspecified OS/Version: Unspecified Status: NEW Severity: unspecified Priority: unspecified Component: lohit-tamil-fonts AssignedTo: [email protected] ReportedBy: [email protected] QAContact: [email protected] CC: [email protected], [email protected], [email protected] Classification: Fedora Story Points: --- Type: --- Regression: --- Mount Type: --- Documentation: --- Created attachment 564352 --> https://bugzilla.redhat.com/attachment.cgi?id=564352 Lohit Tamil font v2.5.0 with name changed to Lohit Tamil Classical, and additional glyphs added to PUA temporarily Description of problem: The Tamil script has a classical orthography in which the vowel sign -aa ligates with the consonants ண NNA ன NNNA ற RRA and the vowel sign -ai ligates with the consonants ண NNA ன NNNA ல LA ள LLA. Thus ணா னா றா (also seen in the right part of ணொ னொ றொ ணோ னோ றோ) and ணை னை லை ளை would be presented differently. This classical style has been documented in the Unicode chapter on Tamil: http://www.unicode.org/versions/Unicode6.0.0/ch09.pdf p 300 and 301 (in the book, not of the PDF) under the name of "Ligatures with -aa in Traditional Tamil Orthography" and "Ligatures with -ai in Traditional Tamil Orthography". So far we are aware of only one Unicode Tamil font which supports it, e-Tamil OTC by Elmar Kniprath from http://www.aai.uni-hamburg.de/indtib/INDOLIPI/Indolipi.htm (http://www.aai.uni-hamburg.de/indtib/INDOLIPI/Tamil.zip). You can check how that font renders the text: ணா னா றா / ணொ னொ றொ / ணோ னோ றோ / ணை னை லை ளை. However we especially like the visual style of Lohit Tamil so we wanted to do a classical style Tamil font based on Lohit Tamil. So we have added the glyphs to the Lohit Tamil TTF font version 2.5.0 and request to convert it into a Lohit Tamil Classical font to be separately parallelly released apart from the Lohit Tamil font. Version-Release number of selected component (if applicable): 2.5.0 How reproducible: Install Lohit Tamil font. Type ணா னா றா / ணொ னொ றொ / ணோ னோ றோ / ணை னை லை ளை. Actual results: There are no ligatures of vowel signs -aa and -ai. This is CORRECT behaviour in modern orthography but NOT in classical orthography. Expected results: The vowel signs -ai and -ai should ligate with the consonants as described above. Additional info: The ligating presentation of the vowel sign -ai is colloquially called "elephant's trunk ai" due to resemblance. After reordering the consonant and -ai ை, the ை glyph can be replaced by the elephant's trunk glyph in contextual substitution before NNA NNNA LA and LLA. The metrics of the {elephant-ai} glyph should however be such that when it simply replaces the regular {ai} glyph ை, it will correctly go and touch into the nna ண nnna ன etc glyphs. Specifically, it will definitely have a negative RSB. Currently we have determined that with an RSB of -118 it will look correct and join with the following ண ன ல ள consonants correctly. -- Configure bugmail: https://bugzilla.redhat.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. _______________________________________________ fonts-bugs mailing list [email protected] https://admin.fedoraproject.org/mailman/listinfo/fonts-bugs http://fonts.fedoraproject.org/
