On Wednesday, September 1, 2021 1:43:56 PM IST kauśika cittūr wrote: > Dear All, > > I have encountered a strange problem using certain Devanagari fonts for the > Sanskrit languagein ConTeXt, wherein the rakaar ligatures are not rendered > properly in some glyphs/conjuncts. The problem is not too easy to describe > so please pardon this long email. > > The fonts I am using are as follows: > • Shobhika – https://github.com/Sandhi-IITBombay/Shobhika > • Murty Sanskrit – https://murtylibrary.com/mcli-fonts.php > > I had previously posted about this issue on TeX SE and Ulrike Fischer was > kind enough to suggest that the problem might have something to do with the > font rendering (since I have no issues in XeLaTeX (using Harfbuzz)): > > https://tex.stackexchange.com/questions/612634/devanagari-forms-in-context-u > sing-shobhika-font > > My ConTeXt (LMTX) version is: 2021.08.30 19:56 > > I am using the following typescript for Murty: > > \starttypescript [serif] [murty] > \definefontsynonym > [Serif] > [name:murtysanskritregular] > [features=devanagari-two] > \stoptypescript > > \starttypescript [murty] > \definetypeface [murty] [rm] [serif] [murty] [default] > \stoptypescript > > and the following for Shobhika: > > \starttypescript [serif] [shobhika] > \definefontsynonym > [Serif] > [name:shobhikaregular] > [features=devanagari-two] > \definefontsynonym > [SerifBold] > [name:shobhikabold] > [features=devanagari-two] > \stoptypescript > > \starttypescript [shobhika] > \definetypeface [shobhika] [rm] [serif] [shobhika] > \stoptypescript > > Below is the test file I am using to demonstrate the problem: > > \setupbodyfont[shobhika] > \starttext > \startcolumns > ट्रा ट्रि ट्री ट्रु द्रू ट्रे ट्रै ट्रो ट्रौ > > ठ्रा ठ्रि ठ्री ठ्रु ठ्रू ठ्रे ठ्रै ठ्रो ठ्रौ > > ड्रा ड्रि ड्री ड्रु ड्रू ड्रे ड्रै ड्रो ड्रौ > > ढ्रा ढ्रि ढ्री ढ्रु ढ्रू ढ्रे ढ्रै ढ्रो ढ्रौ > > छ्रा छ्रि छ्री छ्रु छ्रू छ्रे छ्रै छ्रो छ्रौ > > \column > क्र ख्र ग्र घ्र ण्र > > च्र छ्र ज्र झ्र ञ्र > > च्रे छ्रे ज्रे झ्रे ञ्रे > > त्रे थ्रे द्रे ध्रे न्रे > > प्र फ्र ब्र भ्र म्र > > य्र ल्र व्र स्र श्र ष्र ह्र > \stopcolumns > \stoptext > > When I use the 'devanagari-two' feature set, which sets the script tag to > 'dev2', the rakaar forms (provided by the features 'rkrf=yes' and > 'blwf=yes') do not render properly for some glyphs, namely the glyphs in > the right column, enclosed in a red rectangle in the file > 'devanagari-two-forms-shobhika.png' attached in the Drive folder here. > > When I switch to using the 'devanagari-one' > feature set (in the foregoing typescript definitions), which sets the script > tag to 'deva', the rakaar forms in the left column are rendered incorrectly > in > the file 'devanagari-one-forms-shobhika.png' attached in the Drive folder > here. > > Analogous problems occur with the Murty font. Further, in the Murty font, > one other conjunct, namely > त् + त > does not render properly. I have highlighted this in the file > 'murty-conjuct.png'. > > The sample images demonstrating the issues are available in the following > public Google Drive folder: > > https://drive.google.com/drive/folders/1aOmPKqBzB5usVvT9g-Bxk87exyiQn7ax > > I must mention once again that I have no such problems using either of these > fonts in XeLaTeX. > > What I am noticing is that this problem only occurs with consonant forms > that have a 'circular base', i.e., have no danda (the vertical line) next > to the character. For what it is worth, I have noticed also that I am able > to 'circumvent' this issue if I write > > छ्र + ZWS + Devanagari vowel sign > > where ZWS is the zero-width space U+200B. Unfortunately, this quickly > becomes very untenable in large documents. Since I was new to ConTeXt I did > not venture > to ask earlier on since I had not read much of the documentaion. Now, after > having read quite a bit, I have mustered up the courage to ask here. As a > stop-gap solution, I defined another font alternative with > \definefontalternative[rk] > and used that with a font synonym using 'devanagari-two' where necessary. > > I have completely migrated (away from (Xe)LaTeX )to ConTeXt for all my > university work which is in English with lots of mathematics. I am by no > means an expert but I have learned very much about ConTeXt by reading the > excellent wiki, documentation and mailing list. I have no issues using > ConTeXt on an everyday basis for my English-language based work. It is only > when I tried to use it for my work in Indian-languages that I ran into this > issue. > > I request your kind help in this matter. I really want to be able to use > ConTeXt for these Indic works. I will be grateful for any help and/or > guidance. > > Many thanks, > kauśika
Dear List, I request your kind help in this matter. I have consulted almost all resources on ConTeXt in this regard, despite which I am unable to resolve it. I apologize if my email was unduly long, but I had to describe the problem thoroughly. Please help me resolve this. Many thanks, kauśika ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________
