Embedded fonts

MrPjax · 10-03-2013, 07:22 PM

I have retail epubs that have embedded fonts. I added some fonts to my book I made and they show up fine in Calibre and the Aldiko app on my tablet. But I found that they don't always show on different ereaders.

Could this be because I am using the .ttf format and not .otf??

Thanks.

Toxaris · 10-04-2013, 02:41 AM

No, that should not matter. There could be various reasons:
1. Wrong reference to the fonts in either CSS, XHTML or OPF
2. Font is obfuscated in a non-standard manner
3. the font is not included in the ePUB
4. the OS/2 Version property of the font is not 3 but higher or auto.

Number 4 is the most tricky one. You can check (and adapt) the OS/2 version property via FontForge.

MrPjax · 10-04-2013, 05:39 AM

I think my problem is in the opf. How do you add the info there for the fonts?

MrPjax · 10-04-2013, 05:44 AM

I get this error:

Quote:

The <item> element's "media-type" attribute has value "application/vnd-ms-opentype", but the file's media type is "application/x-font-ttf"

and

Quote:

The <item> element's "media-type" attribute has value "application/vnd-ms-opentype", but the file's media type is "application/vnd.ms-opentype"

Toxaris · 10-04-2013, 07:25 AM

Change the media type would suffice. It is saying what should be there...

theducks · 10-04-2013, 10:11 AM

Quote:

Originally Posted by MrPjax

I get this error:

and

Weird The quote won't show

Look close at #2
one has a period, the other a dash after vnd

JSWolf · 10-04-2013, 10:17 AM

That is a possibly incorrect error message. Check with epubcheck 3.x because FCis wrong in this case saying what needs to be there.

MrPjax · 10-05-2013, 07:15 AM

If the font is done properly, it should show in ALL ereaders, correct? My main use for a custom font is chapter titles and section dividers on the story. The story main text should be the Times font.

Doitsu · 10-05-2013, 08:22 AM

Quote:

Originally Posted by MrPjax

If the font is done properly, it should show in ALL ereaders, correct?

Yes, but some ePub reading apps ignore styles and/or don't support embedded fonts. Also some incorrectly designed fonts may cause rendering errors.

BTW, since the error message that you got seems to have come from FlightCrew you also may want to check your ePub with EpubCheck Online. It also couldn't hurt to test it with ADE.

If neither FlightCrew nor EpubCheck report any errors and the book looks OK in ADE, it's definitely the apps fault. I.e. there's nothing you can do, except maybe defining sans-serif as the fallback font for your heading styles.

Hitch · 10-08-2013, 09:30 PM

Quote:

Originally Posted by Doitsu

Yes, but some ePub reading apps ignore styles and/or don't support embedded fonts. Also some incorrectly designed fonts may cause rendering errors.

Even Nook's HD's will ignore the publisher styling--even when the file is directly side-loaded. Be aware and prepared for that. Many devices are moving closer to total user controls over the fonts, even those that are embedded.

Hitch

10-03-2013, 07:22 PM	#1
MrPjax Junior Member Posts: 7 Karma: 10 Join Date: Feb 2013 Device: Samsung Galaxy Tab 7 Plus	Embedded fonts I have retail epubs that have embedded fonts. I added some fonts to my book I made and they show up fine in Calibre and the Aldiko app on my tablet. But I found that they don't always show on different ereaders. Could this be because I am using the .ttf format and not .otf?? Thanks.

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10-04-2013, 02:41 AM	#2
Toxaris Wizard Posts: 4,520 Karma: 121692313 Join Date: Oct 2009 Location: Heemskerk, NL Device: PRS-T1, Kobo Touch, Kobo Aura	No, that should not matter. There could be various reasons: 1. Wrong reference to the fonts in either CSS, XHTML or OPF 2. Font is obfuscated in a non-standard manner 3. the font is not included in the ePUB 4. the OS/2 Version property of the font is not 3 but higher or auto. Number 4 is the most tricky one. You can check (and adapt) the OS/2 version property via FontForge.

10-04-2013, 05:39 AM	#3
MrPjax Junior Member Posts: 7 Karma: 10 Join Date: Feb 2013 Device: Samsung Galaxy Tab 7 Plus	I think my problem is in the opf. How do you add the info there for the fonts?

10-04-2013, 07:25 AM	#5
Toxaris Wizard Posts: 4,520 Karma: 121692313 Join Date: Oct 2009 Location: Heemskerk, NL Device: PRS-T1, Kobo Touch, Kobo Aura	Change the media type would suffice. It is saying what should be there...

10-04-2013, 10:17 AM	#7
JSWolf Resident Curmudgeon Posts: 73,957 Karma: 128903250 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	That is a possibly incorrect error message. Check with epubcheck 3.x because FCis wrong in this case saying what needs to be there.

10-05-2013, 07:15 AM	#8
MrPjax Junior Member Posts: 7 Karma: 10 Join Date: Feb 2013 Device: Samsung Galaxy Tab 7 Plus	If the font is done properly, it should show in ALL ereaders, correct? My main use for a custom font is chapter titles and section dividers on the story. The story main text should be the Times font.