[XeTeX] embolden bugs

[Will Robertson]

Hello,

I've run into some bugs with the new embolden font feature (not that I  
want to use it, personally, but I understand why it's there).

***********
Problem #1:

Typeset this document with the commented lines uncommented one at a  
time:

\documentclass[12pt]{article}
\begin{document}
%\font\x="Charis SIL" at 12pt\x Hello
%\font\x="Charis SIL:embolden=0" at 12pt\x Hello
%\font\x="Charis SIL:embolden=0.0001" at 12pt\x Hello
\font\x="Charis SIL:embolden=0.001" at 12pt\x Hello
\font\x="Charis SIL:embolden=0.01" at 12pt\x Hello
\font\x="Charis SIL:embolden=0.1" at 12pt\x Hello
\font\x="Charis SIL:embolden=1" at 12pt\x Hello
\font\x="Charis SIL:embolden=10" at 12pt\x Hello
\end{document}

The output is different depending which one is uncommented:

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It also looks like the amount of boldness isn't being applied  
correctly, unless either my eyes are broken or I've completely failed  
to understand what's going on :)

********
Problem #2: Colours & xdv2pdf

Back to an earlier note: how well supported is xdv2pdf going to be in  
the future? Are we kind of hoping to roll everything into xdvipdfmx?

Anyway, check it out:

\documentclass[12pt]{article}
\usepackage{color}
\begin{document}
\font\x="Charis SIL:embolden=2"\x Hello
\font\x="Charis SIL:embolden=2,color=FF0000"\x Hello
\color{red}
\font\x="Charis SIL:embolden=2"\x Hello
\end{document}

You get a lovely halo:

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Doesn't look so good at smaller sizes, though :)

***

These tests were done on a freshly compiled version of XeTeX from SVN  
Revision #613.

Take care,
Will
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