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WeatherGod opened this issue Aug 25, 2015 · 1 comment
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More font rendering issues of mathtext #4987

WeatherGod opened this issue Aug 25, 2015 · 1 comment

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@WeatherGod
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As noted by @zblz in #4873:

Yes, the kerning for the f is particularly tight, but it is tight everywhere, as you mention for the
regular f and numerals 2 and 9 (and that's why I added them to that line), so it is not an issue with
the sub/super script. I tried to minimize it for cm, where it looks pretty good, but did not manage for
stix of stixsans. Maybe the kerning for the f should be slightly widened elsewhere to match TeX. I
added a modification of the superscript kerning that takes into account how much the last character
rises above the x-height to try and mitigate this, but it is tricky: if it is correct for the italic f, it is too
wide for, e.g., $E^0$ (which is already slightly wider than tex), so I tried to reach a compromise.

The prime issue only happens for stix and stixsans, where it seems to match $\prime$ to an already
superscripted prime, as opposed to a nice and big prime for TeX and cm. This I also believe is
outside the scope of this PR, but should definitely be fixed so they are consistent.

All in reference to these images:
mathtex-cm
LaTeX
mathtext-stix
mathtext-stixsans
@WeatherGod WeatherGod mentioned this issue Aug 25, 2015
Merged
zblz added a commit to zblz/matplotlib that referenced this issue Oct 29, 2015
@zblz
Use prime symbol from bakoma
8c2711f 
see comments in matplotlib#4873 and matplotlib#4987: Primes in stix and DejaVu are already
superscripted, so the TeX way of setting a prime as $f^\prime$ results in
doubly-superscripted primes. For consistency with TeX, here we use the CM prime
symbol.
zblz added a commit to zblz/matplotlib that referenced this issue Oct 29, 2015
@zblz
Use prime symbol from bakoma
7fbb259 
see comments in matplotlib#4873 and matplotlib#4987: Primes in stix and DejaVu are already
superscripted, so the TeX way of setting a prime as $f^\prime$ results in
doubly-superscripted primes. For consistency with TeX, here we use the CM prime
symbol.
zblz added a commit to zblz/matplotlib that referenced this issue Oct 29, 2015
@zblz
Use prime symbol from bakoma
8d7e98b 
see comments in matplotlib#4873 and matplotlib#4987: Primes in stix and DejaVu are already
superscripted, so the TeX way of setting a prime as $f^\prime$ results in
doubly-superscripted primes. For consistency with TeX, here we use the CM prime
symbol.
zblz added a commit to zblz/matplotlib that referenced this issue Nov 5, 2015
@zblz
Use prime symbol from bakoma
be43ee5 
see comments in matplotlib#4873 and matplotlib#4987: Primes in stix and DejaVu are already
superscripted, so the TeX way of setting a prime as $f^\prime$ results in
doubly-superscripted primes. For consistency with TeX, here we use the CM prime
symbol.
@zblz zblz mentioned this issue Jan 20, 2016
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@efiring
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efiring commented May 23, 2019

Please reopen this if it still needs attention. Closing for lack of activity; not clear whether there is still a problem.

@efiring efiring closed this as completed May 23, 2019
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@efiring @WeatherGod