Bug in 3.141592653-2.6-0.999995 (TeX Live 2023) with fontspec and tabularray?

[Ross Alexander]

 Hello Karl et al,
Do you know if these fixes were merged for the TL2025 versions, please.
Regards,Ross
    On Friday, 19 April 2024 at 02:38:28 BST, Max Chernoff <mseven at telus.net> wrote:  
 
 Hi Karl,

On Thu, 2024-04-18 at 16:52 -0600, Karl Berry wrote:
> 
>    When using "harf" mode, the font and glyph processing is completely
>    different
> 
> .. and XeTeX always uses harfbuzz. Can someone who wants to pursue this
> see if the original example reproduces with luatex in harf mode? I
> foolishly did not think of this. If luatex+harf and xetex behave the
> same, it seems to me there is no bug to fix ...

LuaTeX seems to be fine in Harf mode too. I tested it with a Devanagari
font to make sure that the HarfBuzz shaper is actually running, but I
don't think that that matters. The LuaTeX output is 1 or 2 scaled points
wider or narrower than the XeTeX output depending on the font size, so
there does appear to be a rounding difference somewhere.

  \parindent=0pt
  
  \def\showdemo#1{
      \ifdefined\directlua
          \input luaotfload.sty
          \font\1={file:NotoSansDevanagari-Regular.ttf:mode=#1;script=dev2;} at 10pt
          \font\2={file:NotoSansDevanagari-Regular.ttf:mode=#1;script=dev2;} at 10.3pt
          \font\3={file:NotoSansDevanagari-Regular.ttf:mode=#1;script=dev2;} at 11pt
      \else
          \font\1="[NotoSansDevanagari-Regular]" at 10pt
          \font\2="[NotoSansDevanagari-Regular]" at 10.3pt
          \font\3="[NotoSansDevanagari-Regular]" at 11pt
          \def\showdemo##1{}
      \fi
  
      \vfill\eject
      {\bf #1 \par}
      \1 \test{क्रर्कि-क्रर्कि}
      \2 \test{क्रर्कि-क्रर्कि}
      \3 \test{क्रर्कि-क्रर्कि}
  }
  
  \def\test#1{%
      \setbox0=\hbox{#1}
      \dimen0=\dimexpr1em\relax
      \vskip4pt
      \vbox to 26pt{
          \tt
          \leavevmode\llap{Font:  }\number\dimen0 sp~ \the\dimen0\par
          \leavevmode\llap{Width: }\number\wd0    sp  \the\wd0  \par
          \vss
      }
      \vbox to 26pt{\hsize=\wd0 \leftskip 0pt plus 1fil                    #1\vss}
      \vbox to 26pt{\hsize=\wd0 \rightskip0pt plus 1fil                    #1\vss}
      \vbox to 26pt{\hsize=\wd0 \leftskip 0pt plus 1fil \rightskip\leftskip #1\vss}
      \par
  }
  
  \showdemo{harf}
  \showdemo{base}
  \showdemo{node}
  
  \bye


Thanks,
-- Max


  
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