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Re: [ft] Type1 header format checking
From: |
Werner LEMBERG |
Subject: |
Re: [ft] Type1 header format checking |
Date: |
Thu, 01 Jun 2017 07:21:17 +0200 (CEST) |
> What i understand till now is that every type 1 postscript font file
> starts with some text like "%!PS-AdobeFont" which has length 14
> characters.
This is specified in the `black book'; the ID strings can be either
`%!FontType1-1.0' or `%!PS-AdobeFont-1.0' (the latter identifies a
PostScript resource).
http://wwwimages.adobe.com/content/dam/Adobe/en/devnet/font/pdfs/T1_SPEC.pdf
> Is there any documentation about these functions as i am unable to
> track them and know what they are actually doing? 2) if i am wrong
> than how is this, checking header format part working in Type1
> driver.
The PFB format is documented in Adobe Technote #5040.
http://wwwimages.adobe.com/content/dam/Adobe/en/devnet/font/pdfs/5040.Download_Fonts.pdf
Note that #5040 also defines `PFA'; however, this is not used today.
Instead, a PFA is simply a PostScript resource where the eexec part is
ASCII encoded instead of binary.
Werner