Quote:
Originally Posted by HarryT
Will a licence that is adequate to cover embedding a font in a PDF therefore be sufficient to cover its use with an ePub, where it's more a case of packaging the font in the file rather than making it in any way inaccessible to the user?
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If the licence only addresses embedding in a PDF, then that's all it covers. The licence we're talking about here specifically allows css @font-face embedding, so there's no problem using it in an epub.
ePub is designed as a delivery format. Sure, someone can jump through a couple of hoops and extract the font, but ereaders don't come with a menu option to extract the font. In exactly the same way, a webpage that uses @font-face is designed solely for the delivery of content, and browsers don't offer the option of extracting the underlying font file. But a skilled user can extract the font with ease, if they feel inclined to do so.
BTW, it
is possible to extract fonts from a PDF (though some features may be missing from the result). Obviously I'm not going to explain how to do so here.