[xep-support] Configuring fonts from an otf file

[Chris Bowditch]

Christopher Wong wrote:

> I'm having trouble translating the old XEP 3.8 fonts.xml definitions of 
> Asian languages to the new 4.2 xep.xml file. The reference manual is too 
> sketchy to be of much help. Here's an example of the old style:
> 
>   <font name="STSong-Light-Acro,Bold"
>         ttf="CIDFont/STSong-Light-Acro"
>         adobe-encoding="UniGB-UCS2-H"
>         adobe-ordering="GB1"
>         adobe-supplement="2"
>         embed="false">
>     <alias name="STSong-Bold"/>
>     <alias name="STSong-Light-Acro-Bold"/>
>   </font>
> 
> I don't see how this can be configured in the new style. Specifically, 
> you cannot do something like:
> 
>    <font-family name="AdobeSongStd-Light,Bold">
>        <font><font-data otf="CIDFont/AdobeSongStd-Light.otf"/></font>
>    </font-family>       <font-alias name="STSongStd-Bold" 
> value="AdobeSongStd-Light,Bold"/>
> 
> XEP will interpret the font-alias as naming two fonts 
> "AdobeSongStd-Light" and "Bold", treating the comma as a separator. How 
> does one configure XEP to use fonts from Adobe's font packs?

We have a very similar problem. I believe the 4.x version of XEP relies on the 
presence of the font-weight attribute on FOs to determine which font element 
to use inside the font-family.

In 3.x, it was possible to set up different fonts with different weights and 
rely on just the font-family name to select the correct one. For example;

<font name="Arial" ttf="Arial.ttf">
</font>
<font name="Arial-Bold" ttf="Arialbd.ttf">
</font>

Unfortunately there doesnt appear to be any way to map this approach into the 
new file format. I realise its probably bad practise to omit the font-weight 
attribute, but some of our customers have done this! And we really need an 
automatic process to upgrade the old font configuration files.

Chris



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