Losing relative font sizes on conversion

hardvice · 06-03-2010, 11:59 PM

I'm in the process of converting a bunch of MOBI .PRC books to .EPUB. The original html files from which I built the MOBI files (using Mobipocket Creator) use relative font sizes in the CSS. For example, the CSS class for the book title uses font-size: x-large; while the class for chapter titles uses font-size: large;.

When I convert the MOBI books in Calibre, everything comes out as normal-sized text. If I open the .EPUB book in Sigil, it appears all of the classes of different sizes are being combined as class=calibre4.

I can edit the books in Sigil to restore the relative font sizes, but it's obviously a pain.

It seems like the font size rescaling in the Look & Feel page during conversion should take care of this, but it's not. None of the source files contain any explicit (i.e. point-size) font size declarations; they use font-size: normal; for body text instead, and I'm guessing that's the problem.

If I use the font size rescaling in Calibre (currently set as base font size 12.0 and font size key 5.0, 7.0, 9.0, 12.0, 13.5, 17.0, 20.0, 22.0, 24.0), I get the same result--all text is the same size. If I explicitly disable font size rescaling, I get the same results.

I'm currently using the Default Input Profile and the iPad output profile.

Is there anything I can change during the conversion to preserve these font sizes? I'm converting a couple hundred files, so anything I can do in Calibre would be preferred to editing all the input or output files manually.

Thanks in advance.

kovidgoyal · 06-04-2010, 02:14 AM

In PRC files all font sizes are remapped to use the <font> html tag. calibre handles these just fine. Are the relative font sizes showing up when you view the prc file?

hardvice · 06-04-2010, 10:43 AM

Hey Kovid,

Thanks for the fast reply!

The PRC files--both the original source file and the one in Calibre's library--display the fonts correctly.

I've mocked up a sample file and am attaching it here. Included are the original HTML document, the PRC built by Mobipocket Creator, and the EPUB built by Calibre.

kovidgoyal · 06-04-2010, 12:03 PM

Will be fixed in next release

hardvice · 06-04-2010, 12:07 PM

Awesome! Thanks!

hardvice · 06-05-2010, 10:40 PM

Just wanted to let you know that I've just installed 0.70 and this conversion is now working perfectly. Thanks so much! This will save me a ton of time.

06-03-2010, 11:59 PM	#1
hardvice Junior Member Posts: 4 Karma: 10 Join Date: Jun 2010 Device: Kindle / iPad	Losing relative font sizes on conversion I'm in the process of converting a bunch of MOBI .PRC books to .EPUB. The original html files from which I built the MOBI files (using Mobipocket Creator) use relative font sizes in the CSS. For example, the CSS class for the book title uses font-size: x-large; while the class for chapter titles uses font-size: large;. When I convert the MOBI books in Calibre, everything comes out as normal-sized text. If I open the .EPUB book in Sigil, it appears all of the classes of different sizes are being combined as class=calibre4. I can edit the books in Sigil to restore the relative font sizes, but it's obviously a pain. It seems like the font size rescaling in the Look & Feel page during conversion should take care of this, but it's not. None of the source files contain any explicit (i.e. point-size) font size declarations; they use font-size: normal; for body text instead, and I'm guessing that's the problem. If I use the font size rescaling in Calibre (currently set as base font size 12.0 and font size key 5.0, 7.0, 9.0, 12.0, 13.5, 17.0, 20.0, 22.0, 24.0), I get the same result--all text is the same size. If I explicitly disable font size rescaling, I get the same results. I'm currently using the Default Input Profile and the iPad output profile. Is there anything I can change during the conversion to preserve these font sizes? I'm converting a couple hundred files, so anything I can do in Calibre would be preferred to editing all the input or output files manually. Thanks in advance.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
font sizes ?	rbeset	ePub	21	07-22-2010 03:49 PM
Font Sizes	Roya	Sigil	7	06-18-2010 09:28 AM
Font Sizes	brewt	Amazon Kindle	9	06-12-2009 03:03 PM
Font Sizes on DX	wallcraft	Amazon Kindle	1	05-06-2009 11:08 PM
Only five font sizes in K2?	KlondikeGeoff	Amazon Kindle	6	02-25-2009 10:21 PM

06-04-2010, 02:14 AM	#2
kovidgoyal creator of calibre Posts: 43,843 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	In PRC files all font sizes are remapped to use the <font> html tag. calibre handles these just fine. Are the relative font sizes showing up when you view the prc file?

06-04-2010, 12:03 PM	#4
kovidgoyal creator of calibre Posts: 43,843 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Will be fixed in next release

06-04-2010, 12:07 PM	#5
hardvice Junior Member Posts: 4 Karma: 10 Join Date: Jun 2010 Device: Kindle / iPad	Awesome! Thanks!

06-05-2010, 10:40 PM	#6
hardvice Junior Member Posts: 4 Karma: 10 Join Date: Jun 2010 Device: Kindle / iPad	Just wanted to let you know that I've just installed 0.70 and this conversion is now working perfectly. Thanks so much! This will save me a ton of time.

Advert

Advert