------ Original Message ------ From "Hans Hagen" <j.ha...@xs4all.nl<mailto:j.ha...@xs4all.nl>> To "ntg-context@ntg.nl<mailto:ntg-context@ntg.nl>" <ntg-context@ntg.nl<mailto:ntg-context@ntg.nl>> Date 5/9/2024 6:29:40 AM Subject [NTG-context] Re: rendering arabic diacritics
** Caution: EXTERNAL Sender ** On 5/9/2024 2:17 PM, Hamid,Idris wrote: Hi Seyal, See below: ------ Original Message ------ From "Hans Hagen" <j.ha...@xs4all.nl<mailto:j.ha...@xs4all.nl> <mailto:j.ha...@xs4all.nl>> To "seyal.zav...@gmail.com<mailto:seyal.zav...@gmail.com> <mailto:seyal.zav...@gmail.com>" <seyal.zav...@gmail.com<mailto:seyal.zav...@gmail.com> <mailto:seyal.zav...@gmail.com>>; "mailing list for ConTeXt users" <ntg-context@ntg.nl<mailto:ntg-context@ntg.nl> <mailto:ntg-context@ntg.nl>> Date 5/9/2024 3:31:45 AM Subject [NTG-context] Re: rendering arabic diacritics ** Caution: EXTERNAL Sender ** On 5/9/2024 10:03 AM, seyal.zav...@gmail.com<mailto:seyal.zav...@gmail.com> <mailto:seyal.zav...@gmail.com> wrote: Hi all, when i want to use the linked font for arabic texts it doesn't render diacritics properly i doesn't have problem with this font in inkscape or libreoffice what featureset should i apply? font link: https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdrive.google.com%2Ffile%2Fd%2F1hCcv6wqWjd-5GEKnaowh8E8YVbTgGqQr%2Fview%3Fusp%3Dsharing&data=05%7C02%7CIdris.Hamid%40ColoState.EDU%7Cc8b63025b08545aa636308dc70244f52%7Cafb58802ff7a4bb1ab21367ff2ecfc8b%7C0%7C0%7C638508548453863256%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=a2qMEGD0wo%2FhM6oNJ7AvfFyRPMEJuu0bFeceX4PPnsg%3D&reserved=0<https://drive.google.com/file/d/1hCcv6wqWjd-5GEKnaowh8E8YVbTgGqQr/view?usp=sharing> <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdrive.google.com%2Ffile%2Fd%2F1hCcv6wqWjd-5GEKnaowh8E8YVbTgGqQr%2Fview%3Fusp%3Dsharing&data=05%7C02%7CIdris.Hamid%40ColoState.EDU%7Cc8b63025b08545aa636308dc70244f52%7Cafb58802ff7a4bb1ab21367ff2ecfc8b%7C0%7C0%7C638508548453873437%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=%2FLAHOebc2kdBEl4rBsEnp7gV4f6ZpXMWNt4FoUptSus%3D&reserved=0<https://drive.google.com/file/d/1hCcv6wqWjd-5GEKnaowh8E8YVbTgGqQr/view?usp=sharing>> this is my MWE: \definefontfeature [arabis] [mode=node,language=dflt,script=arab, init=yes,medi=yes,fina=yes,isol=yes, liga=yes,dlig=yes,rlig=yes,clig=yes, mark=yes,mkmk=yes,kern=yes,curs=yes] \definefont [Ahang] [file:Ahang-Regular.otf*arabis at 18pt] \setupalign[r2l] \starttext {\Ahang تَشْكِيل كَسْرَة} \stoptext \definefont [Ahang] [file:Ahang-Regular.otf*arabic at 18pt] but there is an issue with widths, ill send you a patch to test The provided "*arabic" featureset should suffice for this font. Also TEXpage is useful for this kind of MWE: \definefont [Ahang] [file:Ahang-Regular.otf*arabic at 18pt] \setupalign[r2l] \startTEXpage[offset=1em] {\Ahang تَشْكِيل كَسْرَة} \stopTEXpage In prehistoric ConTeXt version 2023.09.26 18:19 the diacritics look fine in both ConTeXt and unicode editor MS Notepad. So if there is something wrong, it must be in a more recent version. For comparison: Before applying Hans' patch, could you kindly send your pdf of the MWE that shows the error? Mine is attached. Ahang-Regular has no width settings for the marks so we need to zero them. Tahrir_Regular has widths but these we explictly need to zero with a pseudo feature then. (What are the assumptions when we do arabic? That marks are to have zero width?) Yes, marks should have zero-width but Uniscribe (and Harbuzz?/its successor?) provide support for legacy fonts with non-zero width. But sometimes font designers imitate legacy behavior.. So it used to be often the case that a font with diacritics that worked in Uniscribe etc. (e.g., Deja Vu Arabic) would show marks with widths in ConTeXt. In order to be more helpful, I should update to the latest beta, run some tests, and get current on the status of these matters.. Idris -- Idris Samawi Hamid, Professor Department of Philosophy Colorado State University Fort Collins, CO 80523
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