Thanks. I am reading these codes. Tim

Date: Mon, 22 Apr 2013 20:31:25 +0200 From: pragma@wxs.nl To: ntg-context@ntg.nl Subject: Re: [NTG-context] ``fallback" in Typescript

On 4/22/2013 8:11 PM, Philipp Gesang wrote:

...

Hi Tim,

・・・・・・・・・

...

Hi, In the wiki, fallback often appears in the definition of typescript. I am curious about this ``fallback", is there a place to learn the fallback in detail? I haven't found this place in our wiki. Regards, Tim

use the source, Luke:

http://repo.or.cz/w/context.git/blob/refs/heads/origin:/tex/context/base/fon...

http://repo.or.cz/w/context.git/blob/refs/heads/origin:/tex/context/base/typ...

...

As the manual says:

It really makes sense to take a look at the font and type definition files (font-*.tex and type-*.tex). There are fallbacks defined, as well as generic definitions. Studying styles and manual source code may also teach you a few tricks.

I assure you the effort is well worth it.

Best regards Philipp

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Wolfgang, many thanks to you, for your comprehensive explaination. After reading your mail, as a ConTeXt user, I think I can apply the `fallback' to my typescript definition well. Tim From: schuster.wolfgang@gmail.com Date: Tue, 23 Apr 2013 09:28:15 +0200 To: ntg-context@ntg.nl Subject: Re: [NTG-context] ``fallback" in Typescript Am 23.04.2013 um 04:05 schrieb Tim Li :Thanks. I am reading these codes. That won’t help to understand what’s the meaning of these lines. To demonstrate what these lines are for a wrote a small example. \starttypescript[serif][palatino-clone] \definefontsynonym [Serif] [file:texgyrepagellaregular] [features=default] \definefontsynonym [SerifItalic] [file:texgyrepagellaitalic] [features=default]\stoptypescript \starttypescript[sans][helvetica-clone] \definefontsynonym [Sans] [file:texgyreherosregular] [features=default] \definefontsynonym [SansItalic] [file:texgyreherositalic] [features=default]\stoptypescript \definetypeface[mainface][rm][serif][palatino-clone] [default]\definetypeface[mainface][ss][sans] [helvetica-clone][default] %\setupbodyfont[modern]\setupbodyfont[mainface] \starttext \rm\tf Regular \it Italic \sl Slanted \ss\tf Regular \it Italic \sl Slanted \stoptext When you put the code in a file and process you will notice that “\sl Slanted” always usesthe upright Pagella font, this happens because no font was set for this style in the typescriptsand a default font is used. You prevent this unwanted result by adding additional \definefontsynonym lines to thetypescript where you say context to use the italic font for the slanted style. \starttypescript[serif][palatino-clone] \definefontsynonym [Serif] [file:texgyrepagellaregular] [features=default] \definefontsynonym [SerifItalic] [file:texgyrepagellaitalic] [features=default] \definefontsynonym [SerifSlanted] [SerifItalic]\stoptypescript \starttypescript[sans][helvetica-clone] \definefontsynonym [Sans] [file:texgyreherosregular] [features=default] \definefontsynonym [SansItalic] [file:texgyreherositalic] [features=default] \definefontsynonym [SansSlanted] [SansItalic]\stoptypescript Still this wouldn’t be enough when you want to use also the bold and bolditalicstyles for your font even more fallback definitions are needed. The completetypescript for the serif font has to look now like this. \starttypescript[serif][palatino-clone] \definefontsynonym [Serif] [file:texgyrepagellaregular] [features=default] \definefontsynonym [SerifItalic] [file:texgyrepagellaitalic] [features=default] \definefontsynonym [SerifSlanted] [SerifItalic] \definefontsynonym [SerifBold] [Serif] \definefontsynonym [SerifBoldItalic] [SerifBold] \definefontsynonym [SerifBoldSlanted] [SerifBoldItalic] \definefontsynonym [SerifCaps] [Serif]\stoptypescript Because such fallback definitions are needed for many font (especially the slantedto italic mappings) you can predefined lists in type-fbk.mkiv which you can loadat the begin at your typescript to save a few lines and we can abbreviate the abovetypescript in this form. \starttypescript[serif][palatino-clone] \setups[font:fallback:serif] \definefontsynonym [Serif] [file:texgyrepagellaregular] [features=default] \definefontsynonym [SerifItalic] [file:texgyrepagellaitalic] [features=default]\stoptypescript Wolfgang ___________________________________________________________________________________ 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://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________