[luatex] Why does LuaTeX show the middle dot instead of ano teleia?

[Joseph Wright]

On 29/08/2023 21:08, Heiko Oberdiek via luatex wrote:
> Hello,
> 
> On 2023-08-29 21:30, Hans Hagen wrote:
>> On 8/29/2023 8:59 PM, Heiko Oberdiek via luatex wrote:
>>>
>>> On 2023-08-29 20:29, Joseph Wright wrote:
>>>> On 29/08/2023 19:27, Heiko Oberdiek via luatex wrote:
>>>>>
>>>>> using LuaTeX to review the glyphs of a font, I discovered an oddity 
>>>>> about U+0387 ANO TELEIA. LuaTeX shows U+00B7 MIDDLE DOT instead.
>>>
>>>>>          \symbol{"00B7}% MIDDLE DOT
>>>>>          \symbol{"0387}% ANO TELEIA
> 
>> Indeed it's not a luatex issue. Rendering in context gives two 
>> different glyphs with the mentioned unicodes.
> 
> I found that the normalization was done in luaotfload.
> It can be turned off with "normalize=false" (also "mode=base" works):
> 
>      \input luaotfload.sty
>      %\font\TestFont=file:FreeSans.ttf:mode=base
>      \font\TestFont=file:FreeSans.ttf:normalize=false
>      \TestFont
>      \char"00B7\relax
>      \char"0387\relax
>      \nopagenumbers
>      \bye
> 
> However, neither "normalize" nor "mode" are recognized by "fontspec".
> But at least there is a working way via the more low-level "luaotfload".
> 
> Thanks, for the answers.
> 
> Yours sincerely
>    Heiko

\newfontface\TestFontB{FreeSans.ttf}[RawFeature=-normalize]?

(From Ulrike ...)

Joseph