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.mackic...@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 > > > -------------------------------------------------- > Subscriptions, Archive, and List information, etc.: > http://tug.org/mailman/listinfo/xetex > > >
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