Epub displays normally on Mac, but in all italics on Windows?

[Russ]

Does anyone have any idea about how I can solve an epub which displays normally on Calibre Mac, iBooks (Mac), iBooks (iPad), Kindle etc, but display in all italics on Calibre Windows (8 and 10)?

Sadly I cannot post the book here, but it is markdown via Pandoc and looks good elsewhere, any pointer appreciated.

It uses custom fonts and the CSS (snippet below) looks OK.

@font-face {
  font-family: "Vollkorn-SemiBold";
  src: url("../fonts/Vollkorn-SemiBold.ttf");
  font-weight: bold;
  font-style: normal;
}

@font-face {
  font-family: "Vollkorn-Italic";
  src: url("../fonts/Vollkorn-Italic.ttf");
  font-weight: normal;
  font-style: italic;
}

@font-face {
  font-family: "Vollkorn-Regular";
  src: url("../fonts/Vollkorn-Regular.ttf");
  font-weight: normal;
  font-style: normal;
}

body{
  font-family: "Vollkorn-Regular";
  font-size: 0.9em;
  line-height: 1.3;
}

h1, h2, h3, h4, h5, h6,  {
  font-family: "Vollkorn-SemiBold";
  margin-top: 2em;

b, strong {
  font-family: "Vollkorn-SemiBold";
}

em, cite {
  font-family: "Vollkorn-Italic";
}
.....

[DaltonST]

Does your Windows have the very latest version (4.015) of that font from http://vollkorn-typeface.com/ ? If so, try reinstalling it anyway.

[Russ]

Originally Posted by DaltonST

Does your Windows have the very latest version (4.015) of that font from http://vollkorn-typeface.com/ ? If so, try reinstalling it anyway.

Hi DaltonST, thanks for your thoughts... they are probably not the latest fonts, they were from Google Fonts originally, I can update them from the font website on my local machine and re-embed them in the ebook. But I did not think that the fonts needed to be installed on the ebook reader device, as they are in the ebook? I don't have these fonts on my iPad or iPhone for example, but they display just fine in the book.

[theducks]

Russ
the font family is normally the base name (typically 4 members)

Font-weight, font style the cause Usage, the match the declaration in the @ fonts

By default H# are bold
the <i> tag will use the italic version of the current family, same for <b>
No need for different family names for the different weights/strokes The @font sets what to use

[Russ]

Originally Posted by theducks

Russ
the font family is normally the base name (typically 4 members)
Font-weight, font style the cause Usage, the match the declaration in the @ fonts...

Hi theducks, many thanks for your reply. I'm now a little confused, the way I have laid it out is the way it would work with normal css and oddly it works in all the devices I have apart from Calibre in Windows. I think you are suggesting something like this?

@font-face {
  font-family: "Vollkorn";
  src: url("../fonts/Vollkorn-SemiBold.ttf");
  font-weight: bold;
  font-style: normal;
}

@font-face {
  font-family: "Vollkorn";
  src: url("../fonts/Vollkorn-Italic.ttf");
  font-weight: normal;
  font-style: italic;
}

@font-face {
  font-family: "Vollkorn";
  src: url("../fonts/Vollkorn-Regular.ttf");
  font-weight: normal;
  font-style: normal;
}

body{
  font-family: "Vollkorn";
  font-size: 0.9em;
  line-height: 1.3;
}

I will give it a go and report back

[kovidgoyal]

It's impossible to say just looking at a stylesheet, there are many other factors that come into play. Use the scramble ebook plugin and post the book or the editor and delete all extraneous content, leaving enough to demonstrate the issue and post that.

[Larla]

Is it normal to spell normal as "nomral" or is that Abbe Normal?

[pdurrant]

Originally Posted by Larla

Is it normal to spell normal as "nomral" or is that Abbe Normal?

Title fixed.

[Russ]

Originally Posted by kovidgoyal

It's impossible to say just looking at a stylesheet, there are many other factors that come into play. Use the scramble ebook plugin and post the book or the editor and delete all extraneous content, leaving enough to demonstrate the issue and post that.

Firstly, thanks to everyone for all their help. Here is a test epub which has the same characteristics. It's in a zip with some screen shots of devices.

http://download.shoesforindustry.net.../test-epub.zip

[kovidgoyal]

That link does not work for me, SSL error, I suggest just attaching the file here.

[Russ]

Sorry, it should have been http no https, the link is fixed now. Not sure how you attach a file to this forum?

[pdurrant]

Linked file attached. (Go Advanced/Manage Attachments)

[BetterRed]

Originally Posted by Russ

Not sure how you attach a file to this forum?

Originally Posted by pdurrant

Go Advanced/Manage Attachments

Or click the paper-clip icon in Advanced mode top tool bar

BR

[kovidgoyal]

It looks like Qt WebKit on windows doesn't like this font. You can see this for yourself by right clicking on any text, choosing "Inspect Element" then going to the Resources tab and then Frames->HTML file->Fonts and click on the three fonts, you will see that both the regular and italic variants are rendered as italic for some reason. Historically, Qt on windows has had issues with fonts that use a CFF table internally, although that was fixed a while ago.

This should automatically be fixed when calibre updates its version of Qt Webkit, but until then, I'm afraid there's not much that can be done, sorry.

[Russ]

Kovid, many thanks for your efforts, I do appreciate them. As I understand it, the book fonts are OK, apart from when viewed with app on Windows which uses a particular version of Qt, where they display as italic?

I appreciate you are probably very busy, but do you have any idea when Calibre might update it's Qt version?