[XeTeX] experimental new xetex version - with margin-kerning support

Barry MacKichan barry.mackichan at mackichan.com
Mon May 3 18:57:03 CEST 2010


Possibly I don't understand it, but my impression is that font expansion
becomes another parameter to vary in the paragraph layout routine. I
can't see how it can be otherwise given that applying font expansion can
change the line breaks in a paragraph. I can see how that optimization
routine has become very complex with the addition of calling on OpenType
to compute sizes of text chunks, but it seems to me that the changes are
solidly on the XeTeX side of the XeTeX/xdvipdfmx divide.

--Barry

On 5/3/2010 4:41 AM, Martin Schröder wrote:
> 2010/5/3 Barry MacKichan <barry.mackichan at mackichan.com>:
>   
>> Now that that has sunk in ;-) can I ask about the other feature of
>> PDFTeX, namely the ability to improve line breaking by (to my eye)
>> undetectable changes in the font size for a paragraph? Is there any plan
>> to port this to XeTeX?
>>     
> IMHO that will be much harder, since XeTeX is a two-pass machine (.tex
> -> xdv -> pdf) compared to the one-pass approach of pdfTeX which IMHO
> is essential for microtypgraphy.
>
> But if certainly would help if there would be funding. :-)
>
> Best
>    Marti
>
>
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