On Wed, 12 Mar 2025 at 09:57, Cosy MUTO via luatex <[email protected]> wrote:
> Hello,
>
> I wonder this is a bug or a specification change.
> Integral symbol (\int) looks strange in certain fonts.
> Sample source is as follows:
> % ----
> \documentclass[fleqn,a4paper]{article}
> \usepackage{fontspec}
> \usepackage{unicode-math}
> \begin{document}
>
> \setmainfont{STIX Two Text}\setmathfont{STIX Two Math}
> \[ \text{STIX2: } \int \quad \oint \quad \iint \quad \iiint \quad
> \iiiint \]
>
> \setmainfont{NewCM10-Regular}\setmathfont{NewComputerModern Math}
> \[ \text{NewCM: } \int \quad \oint \quad \iint \quad \iiint \quad
> \iiiint \]
>
> \setmainfont{Lato}\setmathfont{Lete Sans Math}%
> \[ \text{Lete Sans Math: } \int \quad \oint \quad \iint \quad \iiint
> \quad \iiiint \]
>
> \end{document}
> % ----
>
> I did not check everything, but I think there exist other fonts like
> these.
>
> The integral symbol in STIX2 and NewCM seem to be a composition of
> \inttop (U+02320) and \intbottom (U+02321).
>
> Expected result is consistent look between integral symbols as in
> TL2024.
>
your test with TL 2025 and latest luatex from gitlab-lisn
$ luatex --credits
This is LuaTeX, Version 1.22.0 (TeX Live 2026/dev)
The luatex project is a ConTeXt community project by
Hans Hagen, Hartmut Henkel, Taco Hoekwater and Luigi Scarso.
The current maintainers are Hans Hagen and Luigi Scarso.
LuaTeX merges and builds upon (parts of) the code from these projects:
tex : Donald Knuth
etex : Peter Breitenlohner, Phil Taylor and friends
omega : John Plaice and Yannis Haralambous
aleph : Giuseppe Bilotta
pdftex : Han The Thanh and friends
kpathsea : Karl Berry, Olaf Weber and others
lua : Roberto Ierusalimschy, Waldemar Celes and Luiz Henrique de
Figueiredo
metapost : John Hobby, Taco Hoekwater, Luigi Scarso, Hans Hagen and friends
pplib : Paweł Jackowski
fontforge : George Williams (partial)
luajit : Mike Pall (used in LuajitTeX)
Compiled with libpng 1.6.47; using 1.6.47
Compiled with lua version 5.3.6
Compiled with mplib version 2.11
Compiled with zlib 1.3.1; using 1.3.1
Development id: 7671
test.pdf
Description: Adobe PDF document
