Re: Using dsrom with MKIV

[Hans Hagen <pragma@wxs.nl>]

Aditya Mahajan wrote:
> Hi,
> 
> The dsrom math font only works partially with MKIV, and I do not 
> understand what is happening. Consider the following example from 
> http://wiki.contextgarden.net/Doublestroke (which I wrote, after 
> suggestions on the mailing list). One needs the fonts, which are part of 
> TL and are also available at 
> http://ctan.org/tex-archive/fonts/doublestroke/
> 
> %=======================================================================
> \loadmapfile[dstroke.map]
> 
> \starttypescript [math] [modern,computer-modern,latin-modern,ams] [size]
>   \definebodyfont [17.3pt,14.4pt,12pt][mm]
>                   [mb=dsrom12 sa 1]
>   \definebodyfont [11pt,10pt,9pt] [mm]
>                   [mb=dsrom10 sa 1]
>   \definebodyfont [8pt,7pt,6pt,5pt,4pt] [mm]
>                   [mb=dsrom8 sa 1]
> \stoptypescript
> 
> \definetypeface [modern] [mm] [math] [modern] [ams] [encoding=texnansi]
> \setupbodyfont[reset,modern,10pt]
> 
> \definefamilysynonym [default] [doublestroke]   [mb]
> 
> \def\dstroke {\fam\purefamily  {doublestroke}}
> 
> \def\doublestroke#1{{\dstroke#1}}
> 
> \starttext
> $\doublestroke{E} \doublestroke{1}$
> \stoptext
> %=======================================================================
> 
> 
> This works correctly in MKII (Both E and 1 are shown in dsrom font). 
> However, in MKIV the 1 is shown in LM Roman rather than dsrom.
> 
> Is this a bug in context font handling, or a bug in the typescript?
> 
> I am using: context version: 2008.12.01 10:25
> This is LuaTeX, Version snapshot-0.30.3-2008112812

\def\doublestroke#1{{\fam\mbfam#1}}

\starttext
$\doublestroke{E} \doublestroke{1}$
\stoptext

indeed does not give a dstroked 1 ... i wonder why; maybe something with 
the mathcodes

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