[NTG-context] font expansion MkXL vs. MkIV

[Pablo Rodriguez]

Hi Wolfgang and Hans,

I have the following sample:

    \setuppapersize[A5]
    \definefontfeature[default][default]
        [protrusion=quality, expansion=quality]
    \definefontfamily[mainface][rm][Source Serif Pro]
    \setupalign[hanging, hz]
    \setupbodyfont[mainface, 17pt]
    %~ \setupbodyfont[helvetica, 17pt]
    \starttext
    \input zapf
    \stoptext

hz doesn’t work fine in MkXL, but it works fine in MkIV.

I think the flow of characters is broken in MKXL. Some

With TeX Gyre Heros (https://pdf.ousia.tk/mkiv-hz.pdf and
https://pdf.ousia.tk/mkxl-hz.pdf):

- "computer": line 5.
- "basic": line 8.
- "showing": line 10.

With Source Serif Pro, also (https://pdf.ousia.tk/ssp-mkiv-hz.pdf and
https://pdf.ousia.tk/ssp-mkxl-hz.pdf):

- "publishing": line 2.
- "about": line 4.
- "between": line 10.

I’m experiencing this wherever I use hz with MkXL.

Sorry, but cannot the default values for quality font expansion be the
same in MkIV and MkXL?

Many thanks for your help,

Pablo
--
http://www.ousia.tk