⅛ not displayed

⅛ not displayed

[Paul Menzel]

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Dear ConTeXt folks,


some fractions (input using Compose) are not displayed in the resulting
PDF files.

        \starttext
        ⅛ ist $\frac18$.
        
        ½, ⅓, ¼, ⅕, ⅙, ⅛
        \stoptext

I guess this is a font problem, but maybe fall backs could be added?


Thanks,

Paul

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\starttext
⅛ ist $\frac18$.

½, ⅓, ¼, ⅕, ⅙, ⅛
\stoptext

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Re: ⅛ not displayed in Latin Modern

[Paul Menzel]

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Dear ConTeXt folks,


Am Samstag, den 29.10.2011, 18:27 +0200 schrieb Paul Menzel:

> some fractions (input using Compose) are not displayed in the resulting
> PDF files.
> 
>         \starttext
>         ⅛ ist $\frac18$.
>         
>         ½, ⅓, ¼, ⅕, ⅙, ⅛
>         \stoptext
> 
> I guess this is a font problem,

using XITS [1][2] (Is that the also the fonts name?), everything is
shown correctly.

        \setupbodyfont[xits]
        
        \starttext
        ⅛ ist $\frac18$.
        
        ½, ⅓, ¼, ⅕, ⅙, ⅛
        \stoptext

> but maybe fall backs could be added?

Since I am wondering why ½ should work but not for example ⅛.


Thanks,

Paul

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\setupbodyfont[xits]

\starttext
⅛ ist $\frac18$.

½, ⅓, ¼, ⅕, ⅙, ⅛
\stoptext

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Re: ⅛ not displayed in Latin Modern

[Paul Menzel]

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Dear ConTeXt folks,


I forgot to append the links.

Am Samstag, den 29.10.2011, 23:12 +0200 schrieb Paul Menzel:

> Am Samstag, den 29.10.2011, 18:27 +0200 schrieb Paul Menzel:
> 
> > some fractions (input using Compose) are not displayed in the resulting
> > PDF files.
> > 
> >         \starttext
> >         ⅛ ist $\frac18$.
> >         
> >         ½, ⅓, ¼, ⅕, ⅙, ⅛
> >         \stoptext
> > 
> > I guess this is a font problem,
> 
> using XITS [1][2] (Is that the also the fonts name?), everything is
> shown correctly.
> 
>         \setupbodyfont[xits]
>         
>         \starttext
>         ⅛ ist $\frac18$.
>         
>         ½, ⅓, ¼, ⅕, ⅙, ⅛
>         \stoptext
> 
> > but maybe fall backs could be added?
> 
> Since I am wondering why ½ should work but not for example ⅛.


Thanks,

Paul


[1] https://github.com/khaledhosny/xits-math
[2] https://en.wikipedia.org/wiki/XITS_font_project

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Re: ⅛ not displayed

[Wolfgang Schuster]

Am 29.10.2011 um 18:27 schrieb Paul Menzel:

> Dear ConTeXt folks,
> 
> 
> some fractions (input using Compose) are not displayed in the resulting
> PDF files.
> 
>        \starttext
>        ⅛ ist $\frac18$.
> 
>        ½, ⅓, ¼, ⅕, ⅙, ⅛
>        \stoptext
> 
> I guess this is a font problem, but maybe fall backs could be added?

You can’t expect from a font to have glyphs for each unicode symbol
and automatic fallbacks are problematic because the fallback font should
match with the regular font.

Wolfgang

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___________________________________________________________________________________

Re: ⅛ not displayed

[luigi scarso]

On Sun, Oct 30, 2011 at 9:44 AM, Wolfgang Schuster
<schuster.wolfgang@googlemail.com> wrote:
>
> Am 29.10.2011 um 18:27 schrieb Paul Menzel:
>
>> Dear ConTeXt folks,
>>
>>
>> some fractions (input using Compose) are not displayed in the resulting
>> PDF files.
>>
>>        \starttext
>>        ⅛ ist $\frac18$.
>>
>>        ½, ⅓, ¼, ⅕, ⅙, ⅛
>>        \stoptext
>>
>> I guess this is a font problem, but maybe fall backs could be added?
>
> You can’t expect from a font to have glyphs for each unicode symbol
> and automatic fallbacks are problematic because the fallback font should
> match with the regular font.
For latin modern we can use Symbola
http://users.teilar.gr/~g1951d/
-- 
luigi
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Re: ⅛ not displayed

[Wolfgang Schuster]

Am 30.10.2011 um 09:49 schrieb luigi scarso:

> On Sun, Oct 30, 2011 at 9:44 AM, Wolfgang Schuster
> <schuster.wolfgang@googlemail.com> wrote:
>> 
>> Am 29.10.2011 um 18:27 schrieb Paul Menzel:
>> 
>>> Dear ConTeXt folks,
>>> 
>>> 
>>> some fractions (input using Compose) are not displayed in the resulting
>>> PDF files.
>>> 
>>>        \starttext
>>>        ⅛ ist $\frac18$.
>>> 
>>>        ½, ⅓, ¼, ⅕, ⅙, ⅛
>>>        \stoptext
>>> 
>>> I guess this is a font problem, but maybe fall backs could be added?
>> 
>> You can’t expect from a font to have glyphs for each unicode symbol
>> and automatic fallbacks are problematic because the fallback font should
>> match with the regular font.
> For latin modern we can use Symbola
> http://users.teilar.gr/~g1951d/

They don’t match that well, even when you scale Symbola to fit Latin Modern
you can see a difference (simplefonts use only the 10pt size of LM).

\usemodule[simplefonts]

\setmainfontfallback[Symbola][range=numberforms]
\setmainfont[Latin Modern Roman]

\starttext
½ ⅓ ¼ ¾ ⅕ ⅙ ⅛ ↉
\stoptext

Wolfgang

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Re: ⅛ not displayed

[Hans Hagen]

On 30-10-2011 09:44, Wolfgang Schuster wrote:
>
> Am 29.10.2011 um 18:27 schrieb Paul Menzel:
>
>> Dear ConTeXt folks,
>>
>>
>> some fractions (input using Compose) are not displayed in the resulting
>> PDF files.
>>
>>         \starttext
>>         ⅛ ist $\frac18$.
>>
>>         ½, ⅓, ¼, ⅕, ⅙, ⅛
>>         \stoptext
>>
>> I guess this is a font problem, but maybe fall backs could be added?
>
> You can’t expect from a font to have glyphs for each unicode symbol
> and automatic fallbacks are problematic because the fallback font should
> match with the regular font.

Indeed, and we should not go the route of all kind of messy fallbacks 
just because tex could do it (using active characters or whatever 
trickery) which on the average looks bad anyway. One should just choose 
a proper font for the job to be done.

I added a replace option to \enabletrackers[fonts.missing=replace] (can 
best be set before any font is loaded, so pretty soon) which will show 
missing characters. Also,

context s-fonts-missing.mkiv

will show the legend (in the next beta that is). Btw, we already have
\enabletrackers [fonts.missing] and \enabletrackers 
[fonts.missing=remove] for quite a while.

Hans


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