As with the thumbnail of the cover image, iBooks also has some special
rules for utilising embedded fonts. Specifically, embedded fonts will
not be used, whether obfuscated or not, unless there is an additional
XML file in the META-INF/ directory. The file does not need to
be in the manifest.
The file name is com.apple.ibooks.display-options.xml and must
contain the following:
Full path of file: META-INF/com.apple.ibooks.display-options.xml
This doesn't change at all, regardless of fonts, font location or
whether they're obfuscated or not. It also doesn't affect anything
else. What it does do, however, is allow iBooks to use the fonts in
the preferred order and to use embedded fonts where necessary.
It also works with both EPUB 2 and 3.
Ideally this file should be copied into the META-INF/ directory in
an EPUB if fonts are included. Perhaps set it to detect whether or
not font-manifest.xml has been called in the transformation or
something like that.
As with the thumbnail of the cover image, iBooks also has some special rules for utilising embedded fonts. Specifically, embedded fonts will not be used, whether obfuscated or not, unless there is an additional XML file in the
META-INF/directory. The file does not need to be in the manifest.The file name is
com.apple.ibooks.display-options.xmland must contain the following:Full path of file:
META-INF/com.apple.ibooks.display-options.xmlThis doesn't change at all, regardless of fonts, font location or whether they're obfuscated or not. It also doesn't affect anything else. What it does do, however, is allow iBooks to use the fonts in the preferred order and to use embedded fonts where necessary.
It also works with both EPUB 2 and 3.
Ideally this file should be copied into the
META-INF/directory in an EPUB if fonts are included. Perhaps set it to detect whether or not font-manifest.xml has been called in the transformation or something like that.