Hi,
Thanks for the information.
Must I rewrite the page content stream?
Since the character code in the original document lacks a ToUnicode section,
thus all content streams in the document which use that font share the same
encoding.
I think that reconstructing a ToUnicode stream for that font is sufficient.
>________________________________
> From: Leonard Rosenthol <lrose...@adobe.com>
>To: WMJ <sd_...@yahoo.com>
>Sent: Thursday, September 6, 2012 8:30 PM
>Subject: RE: [iText-questions] How to subset fonts into an existing PDF file
>
>
>Because of the way that font subsetting works, you can’t just “inject them
>into the PDF”. You will also need to rewrite every single content stream in
>the PDF that refers to that font, since the character code references will no
>longer be correct.
>
>Leonard
>
>From:WMJ [mailto:sd_...@yahoo.com]
>Sent: Thursday, September 06, 2012 8:17 AM
>To: Leonard Rosenthol
>Subject: Re: [iText-questions] How to subset fonts into an existing PDF file
>
>Hi,
>
>I know quite well about the differences between embedding and subsetting and I
>do have the font ready for subsetting. By scanning and analyzing the document
>with iText, I also know quite well what characters will be needed in the
>subsetting process.
>
>For example, now I have a PDF document which uses an external font, FontA for
>instance, which is already installed on my computer. So, the document looks
>OK, but on other computers without FontA, it is unreadable.
>The PDF document uses 10,000 characters and the FontA has 30,000 characters
>available. Embedding the whole FontA is uneconomic, since the other 20,000
>characters are not used by the document. Therefore, I want to extract the
>needed 10,000 character data from FontA and subset them to that PDF document.
>Afterward, the document is portable to other computers which do not have FontA
>installed.
>
>I just wonder whether there's a way to extract the needed character data from
>the existing font and inject them into existing PDF files.
>
>Embedding is well explained in the book iText in Action. Could you please tell
>me if there are APIs available for subsetting?
>
>
>
>>
>>________________________________
>>
>>From:Leonard Rosenthol <lrose...@adobe.com>
>>To: WMJ <sd_...@yahoo.com>; Post all your questions about iText here
>><itext-questions@lists.sourceforge.net>
>>Sent: Thursday, September 6, 2012 7:33 PM
>>Subject: RE: [iText-questions] How to subset fonts into an existing PDF file
>>
>>I think you are confusing EMBEDDED (where some/all of the font data lives
>>inside of the PDF) with SUBSETTED (where the font is embedded BUT only part
>>of it). If the fonts aren’t installed and you have problems, that EMBEDDED.
>>
>>So forget about subsetting, you just need to embed.
>>
>>And in order to do that, you will need to have the fonts and then it it’s
>>fairly straightforward to embed them into a PDF.
>>
>>Leonard
>>
>>From:WMJ [mailto:sd_...@yahoo.com]
>>Sent: Wednesday, September 05, 2012 11:34 PM
>>To: iTextQuestions
>>Subject: [iText-questions] How to subset fonts into an existing PDF file
>>
>>I've gotten an existing PDF file which contains fonts that is not subsetted.
>>If the fonts are not installed in the system, the document can't be displayed
>>correctly. I definitely know what fonts are suitable for those document. How
>>can I subset those fonts into the PDF file?
>>
>
>
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