MobileRead Forums - View Single Post - Possible bug in eBook conversion

arspr · 03-25-2015, 02:05 PM

Hi Kovid,

Because of what jbennion posted in the Kobo bug thread and the solution I posted, I think you should check it.

Basically Kobo ACCESS renderer (for kepubs) goes FUBAR when there are missing or bad linked font files in @font-face in css stylesheets.

In the exact case posted there, the book page_styles.css contained:

Code:

@font-face {
    font-family: "Caecilia";
    font-weight: normal;
    font-style: normal;
    src: url(res:///Data/fonts/Caecilia-Roman.otf)

(and italic and bold and both).

Caecilia is used by "calibre_" class, and the book always contains <body class="calibre_"> in each html file. But the ebook doesn't contain any embedded font file itself.

This situation causes havoc in Kobo Readers.

So the possible bug in Calibre would be:

page_styles.css is created by Calibre, isn't it? Although I've asked jbennion if he has manually edited the epub file, (he did a MOBI to EPUB conversion), I do think you might check if it were possible that Calibre created those font-face settings with those strange urls without embedding the font files themselves.

And the suggestion for Check Book:

As this situation is deadly for Kobos it would be really nice if Check Book informed about missing font files in the used @font-face.

03-25-2015, 02:05 PM	#1
arspr Dead account. Bye Posts: 587 Karma: 668244 Join Date: Mar 2011 Device: none	Possible bug in eBook conversion - Suggestion for check book Hi Kovid, Because of what jbennion posted in the Kobo bug thread and the solution I posted, I think you should check it. Basically Kobo ACCESS renderer (for kepubs) goes FUBAR when there are missing or bad linked font files in @font-face in css stylesheets. In the exact case posted there, the book *page_styles.css* contained: Code: @font-face { font-family: "Caecilia"; font-weight: normal; font-style: normal; src: url(res:///Data/fonts/Caecilia-Roman.otf) (and italic and bold and both). Caecilia is used by "calibre_" class, and the book always contains <body class="calibre_"> in each html file. But the ebook doesn't contain any embedded font file itself. This situation causes havoc in Kobo Readers. So the possible bug in Calibre would be: page_styles.css is created by Calibre, isn't it? Although I've asked jbennion if he has manually edited the epub file, (he did a MOBI to EPUB conversion), I do think you might check if it were possible that Calibre created those font-face settings with those strange urls without embedding the font files themselves. And the suggestion for Check Book: As this situation is deadly for Kobos it would be really nice if Check Book informed about missing font files in the used @font-face.