[tex-live] Fw: "CMap Resources" open source project
lunde at adobe.com
Wed Sep 23 04:04:50 CEST 2009
> Just curious, it does not seemed to contain "Unicode Mapping files"
> like GBK-EUC-UCS2, Adobe-GB1-UCS2, GBpc-EUC-UCS2, etc. Are they
> dropped? Because it is useful for dvipdfmx to generate correct
> bookmarks if the source encoding is not Unicode.
These are not CMap resources, but they indeed use CMap syntax. It is
thus easy to confuse them with genuine CMap resources. A genuine CMap
resource maps character codes to CIDs in a unidirectional manner.
Some of the files you mentioned, such as Adobe-GB1-UCS2, are ToUnicode
mapping files, which unidirectionally map CIDs to UTF-16 character
codes. The others map between character codes, or have other
specialized purposes for Acrobat or Distiller.
I maintain all CMap resources at Adobe Systems, and although the
Acrobat team manages the ToUnicode mapping files, I am the one who
maintains them. Almost all of the other Acrobat-specific mapping files
(that use CMap syntax) have not changed for years. If memory serves,
most were introduced during Acrobat 4.0 development, and haven't
changed since then.
If these Acrobat-specific mapping files are to be placed under the
same open source license, I will need to work with the Acrobat
development team. I would prefer that they be included in a separate
open source project.
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