[texhax] Italic correction

[Reinhard Kotucha]

On 2012-07-21 at 13:32:55 +0100, Philip TAYLOR wrote:

 > Michael Barr wrote:
 > > Mea culpa. It seems that the difference I saw disappeared at a higher
 > > magnification in yap.  I still see it at the standard magnification, nor
 > > can I explain why \/ changes it, but it does.
 > 
 > Could you try re-arranging the ordering, Michael, and see if at normal
 > magnification the artifact remains in the same place on your screen,
 > regardless of rhe markup used to populate that region ?  I suspect it
 > is no more than a rasterising issue.

Phil, whenever something looks worse at low resolution, it *is* a
rasterising issue.  In both file formats, DVI and PDF, the position
of glyphs are described by coordinate pairs, i.e. by two numbers.
These numbers are completely independent of the actual resolution.
Even glyph descriptions in TTF, OTF, and Type1 fonts rely on
coordinate pairs.  All what counts are these numbers.

Of course, rounding errors are unavoidable at low resolutions.  Thus,
whatever you see at low resolutions is absolutely meaningless.  Even
if Michael re-arranges the TeX code, the result will be arbitrary at
low resolutions.

Rasterising is a very difficult task.  I can imagine improvements,
but they would slow down screen viewers significantly.

Regards,
  Reinhard

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Reinhard Kotucha                                      Phone: +49-511-3373112
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