adjusting accents under slant

adjusting accents under slant

[Idris Samawi Hamid ادريس سماوي حامد]

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Dear Hans and gang,

I got this working in mkii -- using other macros --, but mkiv is  
frustrating me:

======================
%% Hans' bottom accent code
\unprotect
\unexpanded\def\bottomaccent#1#2#3#4#5% down right slantcorrection accent  
char
   {\dontleavehmode % why this align mess
    \vtop
      {\forgetall
       \baselineskip\zeropoint
       \lineskip#1%
       \everycr\emptytoks
       \tabskip\zeropoint
       \lineskiplimit\zeropoint
       \setbox0\hbox{#4}%
       \halign
         {##\crcr\hbox{#5}\crcr
          \hidewidth
          \hskip#2\wd0
          \hskip-#3\slantperpoint % in plain 1ex * dimenless value
          \vbox to .2ex{\box0\vss}\hidewidth
          \crcr}}}

	  \unexpanded\def\buildtextbottomdot
	  {\bottomaccent{0ex}{4}{5}{\kern.1em\textbottomdot}}
\let\d\buildtextbottomdot
\protect

\defineactivecharacter ḥ  {\d{h}}

\starttext
ḥ {\it ḥ}
\stoptext
======================

I need to adjust the horizontal position of the dot under the slanted  
char. I would assume the third parameter would control it but nothing  
seems to work.

Of course LM does not look so bad but I'm using a different font so this  
is just an illustration.

Best wishes
Idris
-- 
Professor Idris Samawi Hamid, Editor-in-Chief
International Journal of Shīʿī Studies
Department of Philosophy
Colorado State University
Fort Collins, CO 80523

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Re: adjusting accents under slant

[Hans Hagen]

On 1-11-2011 15:16, Idris Samawi Hamid ادريس   سماوي حامد wrote:
> Dear Hans and gang,
>
> I got this working in mkii -- using other macros --, but mkiv is
> frustrating me:
>
> ======================
> %% Hans' bottom accent code
> \unprotect
> \unexpanded\def\bottomaccent#1#2#3#4#5% down right slantcorrection
> accent char
> {\dontleavehmode % why this align mess
> \vtop
> {\forgetall
> \baselineskip\zeropoint
> \lineskip#1%
> \everycr\emptytoks
> \tabskip\zeropoint
> \lineskiplimit\zeropoint
> \setbox0\hbox{#4}%
> \halign
> {##\crcr\hbox{#5}\crcr
> \hidewidth
> \hskip#2\wd0
> \hskip-#3\slantperpoint % in plain 1ex * dimenless value
> \vbox to .2ex{\box0\vss}\hidewidth
> \crcr}}}
>
> \unexpanded\def\buildtextbottomdot
> {\bottomaccent{0ex}{4}{5}{\kern.1em\textbottomdot}}
> \let\d\buildtextbottomdot
> \protect
>
> \defineactivecharacter ḥ {\d{h}}
>
> \starttext
> ḥ {\it ḥ}
> \stoptext
> ======================
>
> I need to adjust the horizontal position of the dot under the slanted
> char. I would assume the third parameter would control it but nothing
> seems to work.
>
> Of course LM does not look so bad but I'm using a different font so this
> is just an illustration.

\slantperpoint

is a rather traditional tex/font parameter and not present in opentype 
fonts so you have to hard code something there

you could try \definefontfeature[default][default][compose=yes] assuming 
that you have the bottom accent available


-- 

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-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

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___________________________________________________________________________________

Re: adjusting accents under slant

[Idris Samawi Hamid ادريس سماوي حامد]

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On Wed, 02 Nov 2011 06:13:25 -0600, Hans Hagen <pragma@wxs.nl> wrote:

>> Of course LM does not look so bad but I'm using a different font so this
>> is just an illustration.
>
> \slantperpoint
>
> is a rather traditional tex/font parameter and not present in opentype  
> fonts so you have to hard code something there

Sure ... but I can't figure out a way to change the italic behavior  
without changing the tf behavior.

Do you have a trick somewhere where you can define a conditional such that

if slanted font (\it or \sl etc) do x
else
do y

Then we could add that to the macro?

Is there any other way?

> you could try \definefontfeature[default][default][compose=yes] assuming  
> that you have the bottom accent available

I already have compose=yes in the typscripts, e.g.

=================
\definefontfallback
     [latindot]
     [file:LMRoman12-Regular*default]
	[0x0323]
     [force=yes]

\definefontfeature
   [minionpro-tf]
   [mode=node,script=latn,language=dflt,trep=yes,protrusion=quality,
   expansion=quality,compose=yes,combine=yes,tlig=yes,
    kern=yes,liga=yes,onum=yes,cpsp=yes]

\definefontfeature
   [minionpro-it]
   [mode=node,script=latn,language=dflt,trep=yes,compose=yes,combine=yes,tlig=yes,
    kern=yes,liga=yes,onum=yes,cpsp=yes,protrusion=quality,expansion=quality,
    swsh=yes]
=================

but the results are bad using

=================
\defineactivecharacter ḥ  {ḥ} % Ux0323 is explicit within the {}
\defineactivecharacter Ḥ  {Ḥ} % Ux0323 is explicit within the {}
\defineactivecharacter ṣ  {ṣ} % Ux0323 is explicit within the {}
\defineactivecharacter Ṣ  {Ṣ} % Ux0323 is explicit within the {}

\starttext
Ḥ {\it Ḥ}

ḥ {\it ḥ}

Ṣ  {\it Ṣ}

ṣ  {\it ṣ}
\stoptext
=================

See pdf. Even in LM, the results are very uneven ...

If it takes a hard-coded solution for each char that's fine, I should be  
able to extrapolate from a template for just one in regular and italic.

I've experimented with different ideas, but I'm really out of my league on  
this one ... please help!

:-)

Best wishes
Idris


-- 
Professor Idris Samawi Hamid, Editor-in-Chief
International Journal of Shīʿī Studies
Department of Philosophy
Colorado State University
Fort Collins, CO 80523

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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________