Equations surrounding font size

ELITSIO · 03-22-2016, 03:11 PM

Hi,

I have a book with thousands of symbols and equations written in mathml.
I work on mac where calibre shows excellent using mathjax, with the symbols showing the same size with the surrounding text.

On windows calibre, readers complain that the equations show smaller than the surrounding text, really not so good...

My code everywhere is like that:

<p class="body">Equation is...
<span>
<math xmlns="http://www.w3.org/1998/Math/MathML" alttext="equation" xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math"><mi>d</mi><mover accent="true"><mrow><mi>S</mi></mrow><mo>→</mo></mover></math>
</span>
</p>

Is there a way to adjust this calibre or code? Why is this difference between two platforms?

Thank you.

Elias

kovidgoyal · 03-22-2016, 10:47 PM

Check the font used for rendering. If you use a text font that is not embedded in the book and it is not available on the system, then the renderer will fallback on different fonts.

ELITSIO · 03-23-2016, 01:13 PM

Thx, I guess you mean the font of the paragraph style for the <math>? Because I have not set the font inside the <math> declaration.

I thought calibre uses the SVG rendering option of mathjax, so that no fonts should be included in the epub.

thx

kovidgoyal · 03-23-2016, 01:41 PM

No the fonts for the body text. That is the font and font size defined for <body> -- and if none are specified then the fonts specified in the viewer preferences.

ELITSIO · 03-23-2016, 03:03 PM

kovid,

I have tried several things but it seems like there is something I don't understand, the math are shown small. I have my CSS in the epub file with the paragraph style I am using surrounding the <math>.

This style uses the Cambria Math font. In the body section of my html I don't set any font style.

Sorry, I am not a skilled html developer. Can you give me a hint of what I should include in my code?

kovidgoyal · 03-23-2016, 03:15 PM

I have no idea -- I'd need a sample book to be able to help.

ELITSIO · 03-23-2016, 03:48 PM

OK, can I send by email?

kovidgoyal · 03-23-2016, 10:01 PM

Attach it here or follow the instructions in https://www.mobileread.com/forums/sho...d.php?t=186697

ELITSIO · 03-24-2016, 04:32 AM

Thank you for looking at the sample.

So, Mathjax config commands are processed by calibre, or is there a conflict as calibre preloads Mathjax? If so I guess I have to write a conditional config in calibre for Windows case? Isn't there some kind of configuration you could include in calibre so that math shows right in Windows version?

I mean, this should be a very common issue with math books. I currently work for a multi university program of digital books and I would like to suggest calibre as the one-for-all reader solution as I am very impressed by the rendering and behavior of text and math in macs. Also, I would like to suggest an option for loading Mathjax in editor view (it works very nice when I load Mathjax in code)

thank you Kovid,

Elias

kovidgoyal · 03-24-2016, 05:25 AM

You can have arbitrary mathjax config, as shown here: http://manual.calibre-ebook.com/typesetting_math.html

As for your issue, this the first time I've come across, it. Open the demo on that page and you will see no problems with font size on windows. It is something specific to your book. As I said, you will need to contact the MathJax developers for help, or workaround it by scaling as I posted earlier.

ELITSIO · 03-24-2016, 05:33 AM

Sorry, I didn't understand by your message it is a book specific issue. I will check it out.

Thx

kovidgoyal · 03-24-2016, 05:49 AM

Actually I was wrong, it appears to happen with the demo book as well on windows. I'd guess something changed in MathJax 2.6.0 which calibre updated to recently (2 months ago). I'll try updating to 2.6.1 and see if it helps.

kovidgoyal · 03-24-2016, 07:42 AM

https://github.com/mathjax/MathJax/issues/1422

03-22-2016, 03:11 PM	#1
ELITSIO Junior Member Posts: 9 Karma: 10 Join Date: Mar 2016 Device: iPad	Equations surrounding font size Hi, I have a book with thousands of symbols and equations written in mathml. I work on mac where calibre shows excellent using mathjax, with the symbols showing the same size with the surrounding text. On windows calibre, readers complain that the equations show smaller than the surrounding text, really not so good... My code everywhere is like that: <p class="body">Equation is... <span> <math xmlns="http://www.w3.org/1998/Math/MathML" alttext="equation" xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math"><mi>d</mi><mover accent="true"><mrow><mi>S</mi></mrow><mo>→</mo></mover></math> </span> </p> Is there a way to adjust this calibre or code? Why is this difference between two platforms? Thank you. Elias

03-23-2016, 01:13 PM	#3
ELITSIO Junior Member Posts: 9 Karma: 10 Join Date: Mar 2016 Device: iPad	Thx, I guess you mean the font of the paragraph style for the <math>? Because I have not set the font inside the <math> declaration. I thought calibre uses the SVG rendering option of mathjax, so that no fonts should be included in the epub. thx Last edited by ELITSIO; 03-23-2016 at 01:17 PM.

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03-22-2016, 10:47 PM	#2
kovidgoyal creator of calibre Posts: 45,351 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Check the font used for rendering. If you use a text font that is not embedded in the book and it is not available on the system, then the renderer will fallback on different fonts.

03-23-2016, 01:41 PM	#4
kovidgoyal creator of calibre Posts: 45,351 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	No the fonts for the body text. That is the font and font size defined for <body> -- and if none are specified then the fonts specified in the viewer preferences.

03-23-2016, 03:03 PM	#5
ELITSIO Junior Member Posts: 9 Karma: 10 Join Date: Mar 2016 Device: iPad	kovid, I have tried several things but it seems like there is something I don't understand, the math are shown small. I have my CSS in the epub file with the paragraph style I am using surrounding the <math>. This style uses the Cambria Math font. In the body section of my html I don't set any font style. Sorry, I am not a skilled html developer. Can you give me a hint of what I should include in my code?

03-23-2016, 03:15 PM	#6
kovidgoyal creator of calibre Posts: 45,351 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	I have no idea -- I'd need a sample book to be able to help.

03-23-2016, 03:48 PM	#7
ELITSIO Junior Member Posts: 9 Karma: 10 Join Date: Mar 2016 Device: iPad	OK, can I send by email?

03-23-2016, 10:01 PM	#8
kovidgoyal creator of calibre Posts: 45,351 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Attach it here or follow the instructions in https://www.mobileread.com/forums/sho...d.php?t=186697

03-24-2016, 04:32 AM	#9
ELITSIO Junior Member Posts: 9 Karma: 10 Join Date: Mar 2016 Device: iPad	Thank you for looking at the sample. So, Mathjax config commands are processed by calibre, or is there a conflict as calibre preloads Mathjax? If so I guess I have to write a conditional config in calibre for Windows case? Isn't there some kind of configuration you could include in calibre so that math shows right in Windows version? I mean, this should be a very common issue with math books. I currently work for a multi university program of digital books and I would like to suggest calibre as the one-for-all reader solution as I am very impressed by the rendering and behavior of text and math in macs. Also, I would like to suggest an option for loading Mathjax in editor view (it works very nice when I load Mathjax in code) thank you Kovid, Elias

03-24-2016, 05:25 AM	#10
kovidgoyal creator of calibre Posts: 45,351 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	You can have arbitrary mathjax config, as shown here: http://manual.calibre-ebook.com/typesetting_math.html As for your issue, this the first time I've come across, it. Open the demo on that page and you will see no problems with font size on windows. It is something specific to your book. As I said, you will need to contact the MathJax developers for help, or workaround it by scaling as I posted earlier.

03-24-2016, 05:33 AM	#11
ELITSIO Junior Member Posts: 9 Karma: 10 Join Date: Mar 2016 Device: iPad	Sorry, I didn't understand by your message it is a book specific issue. I will check it out. Thx

03-24-2016, 05:49 AM	#12
kovidgoyal creator of calibre Posts: 45,351 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Actually I was wrong, it appears to happen with the demo book as well on windows. I'd guess something changed in MathJax 2.6.0 which calibre updated to recently (2 months ago). I'll try updating to 2.6.1 and see if it helps.

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03-24-2016, 07:42 AM	#13
kovidgoyal creator of calibre Posts: 45,351 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	https://github.com/mathjax/MathJax/issues/1422