Mixing math and text font

Mixing math and text font

[Joshua Krämer]

Dear list,

in my math, I would like one font (the text font) to be used for letters 
and digits and another font (the math font) to be used for mathematical 
symbols.  I have tried it like that:

% Example 1
\usemodule[simplefonts][size=40pt]
\setmathfont[termes]
\setmainfont[latinmodernroman]
\starttext
123\\$ 123 \coprod \leftrightarrow $
\stoptext

% Example 2
\definetypeface	[fonttest]	[rm]	[serif]	[modern]
\definetypeface	[fonttest]	[mm]	[math]	[termes]
\setupbodyfont[fonttest, 40pt]
\starttext
123\\$ 123 \coprod \leftrightarrow $
\stoptext

In both examples, the math font is used for the whole formula.  How can I 
mix the fonts?

Kind regards and best wishes for 2014,
Joshua Krämer

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Re: Mixing math and text font

[Wolfgang Schuster]

Am 04.01.2014 um 16:04 schrieb Joshua Krämer <joshua.kraemer@gmail.com>:

> Dear list,
> 
> in my math, I would like one font (the text font) to be used for letters 
> and digits and another font (the math font) to be used for mathematical 
> symbols.  I have tried it like that:
> 
> % Example 1
> \usemodule[simplefonts][size=40pt]
> \setmathfont[termes]
> \setmainfont[latinmodernroman]
> \starttext
> 123\\$ 123 \coprod \leftrightarrow $
> \stoptext
> 
> % Example 2
> \definetypeface	[fonttest]	[rm]	[serif]	[modern]
> \definetypeface	[fonttest]	[mm]	[math]	[termes]
> \setupbodyfont[fonttest, 40pt]
> \starttext
> 123\\$ 123 \coprod \leftrightarrow $
> \stoptext
> 
> In both examples, the math font is used for the whole formula.  How can I 
> mix the fonts?

This is possible but you have to use the context suite [1] and not texlive or miktex because the context version they provide doesn’t include the necessary mechanism.

[1] http://wiki.contextgarden.net/ConTeXt_Standalone

Wolfgang
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Re: Mixing math and text font

[Joshua Krämer]

Am Sat, 04 Jan 2014 17:44:22 +0100 schrieb Wolfgang Schuster:

> This is possible but you have to use the context suite [1] and not
> texlive or miktex because the context version they provide doesn’t
> include the necessary mechanism.
> 
> [1] http://wiki.contextgarden.net/ConTeXt_Standalone
> 
> Wolfgang

Thanks for your answer.  I already use context standalone, but even after 
an update (first-setup.sh), the fonts are not mixed.  What are the 
additional steps to do?

Kind regards,
Joshua Krämer

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Re: Mixing math and text font

[Aditya Mahajan]

[-- Attachment #1: Type: TEXT/PLAIN, Size: 952 bytes --]

On Sat, 4 Jan 2014, Joshua Krämer wrote:

> Dear list,
>
> in my math, I would like one font (the text font) to be used for letters 
> and digits and another font (the math font) to be used for mathematical 
> symbols.  I have tried it like that:
>
> % Example 1
> \usemodule[simplefonts][size=40pt]
> \setmathfont[termes]
> \setmainfont[latinmodernroman]
> \starttext
> 123\\$ 123 \coprod \leftrightarrow $
> \stoptext
>
> % Example 2
> \definetypeface	[fonttest]	[rm]	[serif]	[modern]
> \definetypeface	[fonttest]	[mm]	[math]	[termes]
> \setupbodyfont[fonttest, 40pt]
> \starttext
> 123\\$ 123 \coprod \leftrightarrow $
> \stoptext
>
> In both examples, the math font is used for the whole formula.  How can I 
> mix the fonts?


You ask for modern as the text font and termes as the math font, and that 
is what you get. Can you elaborate what do you mean by 'mix the fonts'? 
What output do you want to get.

Aditya

[-- Attachment #2: Type: text/plain, Size: 485 bytes --]

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Re: Mixing math and text font

[Joshua Krämer]

Am Sat, 04 Jan 2014 12:47:24 -0500 schrieb Aditya Mahajan:

> You ask for modern as the text font and termes as the math font, and
> that is what you get. Can you elaborate what do you mean by 'mix the
> fonts'?
> What output do you want to get.

For the text font I use (it's a commercial typeface), a matching math 
font doesn't exist.  Now if I use for example Termes as the math font, 
the formulae don't match the regular text, because the letters and digits 
differ.  That's why I want in the formulae math symbols like special 
arrows and operators to be taken from Termes, but regular alphanumeric 
characters from my text font.  So in my minimal examples, "123" should 
look the same in the text and the formula.

Kind regards,
Joshua Krämer

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Re: Mixing math and text font

[Wolfgang Schuster]

Am 04.01.2014 um 18:22 schrieb Joshua Krämer <joshua.kraemer@gmail.com>:

> Am Sat, 04 Jan 2014 17:44:22 +0100 schrieb Wolfgang Schuster:
> 
>> This is possible but you have to use the context suite [1] and not
>> texlive or miktex because the context version they provide doesn’t
>> include the necessary mechanism.
>> 
>> [1] http://wiki.contextgarden.net/ConTeXt_Standalone
>> 
>> Wolfgang
> 
> Thanks for your answer.  I already use context standalone, but even after 
> an update (first-setup.sh), the fonts are not mixed.  What are the 
> additional steps to do?

You have to switch from the simplefonts module to the new fontfamily
command (a new built-in system which replaces simplefonts) to set
the fonts for your document.

The fourth argument specifies which part of the font you want to replace
(you could also have written [preset=math:lowercaseitalic] instead of
[math:lowercaseitalic]).

\definefontfamily     [mainface] [rm] [Latin Modern Roman]

\definefallbackfamily [mainface] [mm] [Latin Modern Roman] [math:lowercaseitalic]
\definefontfamily     [mainface] [mm] [TeX Gyre Termes Math]

\setupbodyfont[mainface]

\starttext
TeX uses different fonts for text and math, e.g. \math{f(x)=x^2+2x+4} but it possible to replace certain characters in the math font with glyphs from a text font.
\stoptext

Wolfgang
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Re: Mixing math and text font

[Joshua Krämer]

Am Sat, 04 Jan 2014 19:50:24 +0100 schrieb Wolfgang Schuster:

> You have to switch from the simplefonts module to the new fontfamily
> command (a new built-in system which replaces simplefonts) to set the
> fonts for your document. [...]

Thank you, it functions as intended.  I suppose this mechanism works with 
Opentype math fonts only?

However, I'm glad to know ConTeXt's font handling is evolving!

Kind regards,
Joshua

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Re: Mixing math and text font

[Wolfgang Schuster]

Am 08.01.2014 um 11:52 schrieb Joshua Krämer <joshua.kraemer@gmail.com>:

> Am Sat, 04 Jan 2014 19:50:24 +0100 schrieb Wolfgang Schuster:
> 
>> You have to switch from the simplefonts module to the new fontfamily
>> command (a new built-in system which replaces simplefonts) to set the
>> fonts for your document. [...]
> 
> Thank you, it functions as intended.  I suppose this mechanism works with 
> Opentype math fonts only?

Yes, you need an opentype math font but when it would be possible to use the fallback
mechanism with a virtual math font the \definefallbackfamily can’t be used for them.

> However, I'm glad to know ConTeXt's font handling is evolving!

The support of the fallback mechanism for math fonts was a recent addition from Hans.

The new \definefontfamily commands are part of the new version of the simplefonts
module which tries to stay closer to context normal typeface mechanism.

Wolfgang
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Re: Mixing math and text font

[Joshua Krämer]

Thanks for your hard work!  I have a few additional questions regarding 
the new system and font fallbacks.


(1) How can I replace the hyphen automatically inserted at linebreaks?  
If I use the following, only manually inserted hyphens are replaced:

\definefallbackfamily[mainface][serif][TeX Gyre Termes][range={0x0002d}]


(2) What effect does force=yes have?  It doesn't seem to make a 
difference for me.


(3) I have a typeface that uses unusual style names: "roman1", "roman2", 
"italic1", "italic2";  1 is regular, 2 is bold weight.  The following 
works:

\definefontfamily[xxxface][serif][xxx][regularfont=xxxroman1, 
italicfont=xxxitalic1, boldfont=xxxroman2]
\setupbodyfont[xxxface]
\starttext
abc {\it abc} {\bf abc}
\stoptext

This works for roman1 only:

\definefontfamily[xxxface][serif][xxx][regularfont=spec:roman1, 
italicfont=spec:italic1, boldfont=spec:roman2]

Even this works for roman1 only:

\definefontfamily[xxxface][serif][xxx][regularfont=spec:roman1, 
italicfont=xxxitalic1, boldfont=xxxroman2]


(4) Now I want to use this typeface for math fallback.  In the following 
example, the upright glyphs are replaced, but not the italic glyphs:

\definefontfamily[xxxface][serif][xxx][regularfont=xxxroman1, 
italicfont=xxxitalic1, boldfont=xxxroman2]
\definefallbackfamily[xxxface][math][xxx][regularfont=xxxroman1, 
preset=math:lowercasenormal]
\definefallbackfamily[xxxface][math][xxx][regularfont=xxxroman1, 
preset=math:uppercasenormal]
\definefallbackfamily[xxxface][math][xxx][italicfont=xxxitalic1, 
preset=math:lowercaseitalic]
\definefallbackfamily[xxxface][math][xxx][italicfont=xxxitalic1, 
preset=math:uppercaseitalic]
\definefallbackfamily[xxxface][math][xxx][regularfont=xxxroman1, 
preset=math:digitsnormal]
\definefontfamily[xxxface][math][TeX Gyre Termes Math]
\setupbodyfont[xxxface]
\starttext
$ \coprod \leftrightarrow ABC abc {\mathupright ABC abc} 123 $ 
\stoptext


Kind regards,
Joshua

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Re: Mixing math and text font

[Joshua Krämer]

Am Thu, 09 Jan 2014 11:01:16 +0000 schrieb Joshua Krämer:
> (2) What effect does force=yes have?  It doesn't seem to make a
> difference for me.

I've read in another mail that force=yes is now set by default, so this 
is clear to me now.

Joshua

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Re: Mixing math and text font

[Wolfgang Schuster]

Am 09.01.2014 um 12:01 schrieb Joshua Krämer <joshua.kraemer@gmail.com>:

> Thanks for your hard work!  I have a few additional questions regarding 
> the new system and font fallbacks.
> 
> 
> (1) How can I replace the hyphen automatically inserted at linebreaks?  
> If I use the following, only manually inserted hyphens are replaced:
> 
> \definefallbackfamily[mainface][serif][TeX Gyre Termes][range={0x0002d}]

Dunno, can you make this a separate question?

> (2) What effect does force=yes have?  It doesn't seem to make a 
> difference for me.

When you set “force=yes” (default value) context uses the fallback font even
when the character exists the main font.

> (3) I have a typeface that uses unusual style names: "roman1", "roman2", 
> "italic1", "italic2";  1 is regular, 2 is bold weight.  The following 
> works:
> 
> \definefontfamily[xxxface][serif][xxx][regularfont=xxxroman1, 
> italicfont=xxxitalic1, boldfont=xxxroman2]
> \setupbodyfont[xxxface]
> \starttext
> abc {\it abc} {\bf abc}
> \stoptext
> 
> This works for roman1 only:
> 
> \definefontfamily[xxxface][serif][xxx][regularfont=spec:roman1, 
> italicfont=spec:italic1, boldfont=spec:roman2]
> 
> Even this works for roman1 only:
> 
> \definefontfamily[xxxface][serif][xxx][regularfont=spec:roman1, 
> italicfont=xxxitalic1, boldfont=xxxroman2]

The name of the font files has nothing to do with way how \definefontfamily
collects the individual files for each style, to do this it uses internal names
and values from the font.

In a case where \definefontfamily can’t find all styles you can select them
with the name of the files:

\definefontfamily[<typeface>][<style>][<family name>][tf=file:uprightfont,it=file:italicfont,…]

> (4) Now I want to use this typeface for math fallback.  In the following 
> example, the upright glyphs are replaced, but not the italic glyphs:
> 
> \definefontfamily[xxxface][serif][xxx][regularfont=xxxroman1, 
> italicfont=xxxitalic1, boldfont=xxxroman2]
> \definefallbackfamily[xxxface][math][xxx][regularfont=xxxroman1, 
> preset=math:lowercasenormal]
> \definefallbackfamily[xxxface][math][xxx][regularfont=xxxroman1, 
> preset=math:uppercasenormal]
> \definefallbackfamily[xxxface][math][xxx][italicfont=xxxitalic1, 
> preset=math:lowercaseitalic]
> \definefallbackfamily[xxxface][math][xxx][italicfont=xxxitalic1, 
> preset=math:uppercaseitalic]
> \definefallbackfamily[xxxface][math][xxx][regularfont=xxxroman1, 
> preset=math:digitsnormal]
> \definefontfamily[xxxface][math][TeX Gyre Termes Math]
> \setupbodyfont[xxxface]
> \starttext
> $ \coprod \leftrightarrow ABC abc {\mathupright ABC abc} 123 $ 
> \stoptext


When you use a opentype math font the upright, italic, bold etc. characters
are all in the same file which uses only the regular style (a few math fonts
provide also a bold style which can be useful in headings).

Because there is only a upright math font you have to set a fallbacks
also for the upright style even when the font you’re using is italic, e.g.

\definefallbackfamily[xxxface][math][xxx][tf=file:xxxitalic1,preset=math:lowercaseitalic]

Wolfgang

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Re: Mixing math and text font

[Joshua Krämer]

Am Thu, 9 Jan 2014 20:41:15 +0100
schrieb Wolfgang Schuster <schuster.wolfgang@gmail.com>:

> > (3) I have a typeface that uses unusual style names: "roman1",
> > "roman2", "italic1", "italic2";  1 is regular, 2 is bold weight.
> > The following works:
> > 
> > \definefontfamily[xxxface][serif][xxx][regularfont=xxxroman1, 
> > italicfont=xxxitalic1, boldfont=xxxroman2]
> > \setupbodyfont[xxxface]
> > \starttext
> > abc {\it abc} {\bf abc}
> > \stoptext
> > 
> > This works for roman1 only:
> > 
> > \definefontfamily[xxxface][serif][xxx][regularfont=spec:roman1, 
> > italicfont=spec:italic1, boldfont=spec:roman2]
> > 
> > Even this works for roman1 only:
> > 
> > \definefontfamily[xxxface][serif][xxx][regularfont=spec:roman1, 
> > italicfont=xxxitalic1, boldfont=xxxroman2]
> 
> The name of the font files has nothing to do with way how
> \definefontfamily collects the individual files for each style, to do
> this it uses internal names and values from the font.

I've got the values from the output of "mtxrun --script fonts --list
--all --pattern=xxx" (and compared with the name/style values in
Fontforge), so I don't understand why "spec:roman1" works, but
"spec:italic1" doesn't.

Additionally, what I think must be a bug is that
"italicfont=file:xxxitalic1, boldfont=file:xxxroman2" works but stops
working if I add "regularfont=spec:roman1":

\definefontfamily[xxxface][serif][xxx][regularfont=spec:roman1,
italicfont=file:xxxitalic1, boldfont=file:xxxroman2]

Maybe if one of the values uses the "spec:" selector, all the values
are treated as spec values despite the "file:" selector given?


> When you use a opentype math font the upright, italic, bold etc.
> characters are all in the same file which uses only the regular style
> (a few math fonts provide also a bold style which can be useful in
> headings).
> 
> Because there is only a upright math font you have to set a fallbacks
> also for the upright style even when the font you’re using is italic,
> e.g.
> 
> \definefallbackfamily[xxxface][math][xxx][tf=file:xxxitalic1,preset=math:lowercaseitalic]

Thanks, this works.  For some reason, "tf=" works, but "regularfont="
doesn't.

And by the way, this works:
\definefontfamily[leitura][serif][Leitura News][regularfont=spec:roman2]

and this doesn't work:
\definefontfamily[leitura][serif][Leitura News][tf=spec:roman2]

So in some cases only "regularfont" seems to work, and in some cases
only "tf".

Kind regards,
Joshua


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Re: Mixing math and text font

[Wolfgang Schuster]

Am 09.01.2014 um 22:30 schrieb Joshua Krämer <joshua.kraemer@gmail.com>:

> Am Thu, 9 Jan 2014 20:41:15 +0100
> schrieb Wolfgang Schuster <schuster.wolfgang@gmail.com>:
> 
>>> (3) I have a typeface that uses unusual style names: "roman1",
>>> "roman2", "italic1", "italic2";  1 is regular, 2 is bold weight.
>>> The following works:
>>> 
>>> \definefontfamily[xxxface][serif][xxx][regularfont=xxxroman1, 
>>> italicfont=xxxitalic1, boldfont=xxxroman2]
>>> \setupbodyfont[xxxface]
>>> \starttext
>>> abc {\it abc} {\bf abc}
>>> \stoptext
>>> 
>>> This works for roman1 only:
>>> 
>>> \definefontfamily[xxxface][serif][xxx][regularfont=spec:roman1, 
>>> italicfont=spec:italic1, boldfont=spec:roman2]
>>> 
>>> Even this works for roman1 only:
>>> 
>>> \definefontfamily[xxxface][serif][xxx][regularfont=spec:roman1, 
>>> italicfont=xxxitalic1, boldfont=xxxroman2]
>> 
>> The name of the font files has nothing to do with way how
>> \definefontfamily collects the individual files for each style, to do
>> this it uses internal names and values from the font.
> 
> I've got the values from the output of "mtxrun --script fonts --list
> --all --pattern=xxx" (and compared with the name/style values in
> Fontforge), so I don't understand why "spec:roman1" works, but
> "spec:italic1" doesn't.
> 
> Additionally, what I think must be a bug is that
> "italicfont=file:xxxitalic1, boldfont=file:xxxroman2" works but stops
> working if I add "regularfont=spec:roman1":
> 
> \definefontfamily[xxxface][serif][xxx][regularfont=spec:roman1,
> italicfont=file:xxxitalic1, boldfont=file:xxxroman2]
> 
> Maybe if one of the values uses the "spec:" selector, all the values
> are treated as spec values despite the "file:" selector given?

What you try can’t work because spec is one of context three methods to load a font,
the first two are “file:…” and “name:…”. With the spec method you give context a list
of features for the font you want to load, the spec specifier has 5 argument:

1. The family name of the font
2. The weight of the font (light, normal, medium, bold, …)
3. The style of the font (normal, italic, slanted, …)
4. The width of the font (condensed, normal, expanded, …)
5. The variant of the font (normal, old style or smallcaps)

When you load a font you separate all arguments by a hyphen, when you leave
arguments out they get normal as default values. Below is a example how to load
TeX Gyre Pagella Regular and Bold with the spec method:

\starttext

{\definedfont[spec:texgyrepagella-normal]TeX Gyre Pagella Regular}

{\definedfont[spec:texgyrepagella-bold]TeX Gyre Pagella Bold}

\stoptext

When you want now the bolditalic form of the font you have to set the third argument
for the style:

\starttext

{\definedfont[spec:texgyrepagella-bold-normal]TeX Gyre Pagella Bold}

{\definedfont[spec:texgyrepagella-bold-italic]TeX Gyre Pagella Bolditalic}

\stoptext

When you now use the spec method with \definefontfamily nearly the same thing
happens but you set only the argument 2–5 because the name of the font was
already set.

>> When you use a opentype math font the upright, italic, bold etc.
>> characters are all in the same file which uses only the regular style
>> (a few math fonts provide also a bold style which can be useful in
>> headings).
>> 
>> Because there is only a upright math font you have to set a fallbacks
>> also for the upright style even when the font you’re using is italic,
>> e.g.
>> 
>> \definefallbackfamily[xxxface][math][xxx][tf=file:xxxitalic1,preset=math:lowercaseitalic]
> 
> Thanks, this works.  For some reason, "tf=" works, but "regularfont="
> doesn't.
> 
> And by the way, this works:
> \definefontfamily[leitura][serif][Leitura News][regularfont=spec:roman2]
> 
> and this doesn't work:
> \definefontfamily[leitura][serif][Leitura News][tf=spec:roman2]
> 
> So in some cases only "regularfont" seems to work, and in some cases only "tf“.

Just avoid the spec method, it depends a lot on the information in the font
and is not always reliable, because of this I don’t use it as default method
to search for all files in a font family.

Wolfgang
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Re: Mixing math and text font

[Wolfgang Schuster]

Am 09.01.2014 um 23:12 schrieb Joshua Krämer <joshua.kraemer@gmail.com>:

> Dear Wolfgang,
> 
> thanks for your clarifications.  I will avoid the spec method.  The
> remaining question is, if "regularfont=" should be avoided, too, in
> favour of "tf=", or will this be made to work in the future?

The “regularfont”, “regularfeatures” etc. keys are going to disappear at some
point because both settings can be done with with “tf”, “it” etc. keys.

Wolfgang
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Re: Mixing math and text font

[Joshua Krämer]

Dear Wolfgang,

thanks for your clarifications.  I will avoid the spec method.  The
remaining question is, if "regularfont=" should be avoided, too, in
favour of "tf=", or will this be made to work in the future?

> \definefallbackfamily[xxxface][math][xxx][regularfont=file:xxxitalic1,preset=math:lowercaseitalic]

Kind regards,
Joshua

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