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-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
-<html>
-<head>
-<title>Adobe CIDs and glyphs in CJK TrueType font</title>
-<!-- $Id: CJKTTCID.htm,v 1.1.4.8.2.5 2003/05/17 14:38:59 giles Exp $ -->
-<link rel="stylesheet" type="text/css" href="gs.css" title="Ghostscript Style">
-</head>
-
-<body>
-<!-- [1.0 begin visible header] ============================================ -->
-
-<!-- [1.1 begin headline] ================================================== -->
-
-<h1>Adobe CIDs and glyphs in CJK TrueType font</h1>
-
-<!-- [1.1 end headline] ==================================================== -->
-
-<!-- [1.2 begin table of contents] ========================================= -->
-
-<h2>Table of contents</h2>
-
-<blockquote><ul>
-<li><a href="#Overview">Overview</a></li>
-<li><a href="#Notes">Adobe CIDs that current Ghostscript can fills by CJK TTF</a></li>
-<li><a href="#References">References</a></li>
-</ul></blockquote>
-
-<!-- [1.2 end table of contents] =========================================== -->
-
-<!-- [1.3 begin hint] ====================================================== -->
-
-This article is written by Taiji Yamada
-&lt;<a href="mailto:taiji@aihara.co.jp">taiji@aihara.co.jp</a>&gt;.
-He takes full responsibility for the wording and content of this article.
-
-<p>For other information, see the <a href="Readme.htm">Ghostscript
-overview</a>.
-
-<!-- [1.3 end hint] ======================================================== -->
-
-<hr>
-
-<!-- [1.0 end visible header] ============================================== -->
-
-<!-- [2.0 begin contents] ================================================== -->
-
-
-<h2><a name="Overview"></a>Overview</h2>
-
-<p>
-This note provides information on utilization of CJK (Chinese,
-Japanese and Korean) TrueType fonts (TTF) as CIDFoneType 2 (Type11)
-CID-keyed fonts from the viewpoint of its validity and limitation.
-In order to compose CIDFontType 2 font from CJK TTF on the fly,
-Ghostscript uses not only standard CMaps (mapping from character
-encoding to CID, we call them ToCID CMaps in following) but also
-ToUnicode CMaps (mapping from CID to Unicode) and
-ToCode CMaps (mapping from CID to non-Unicode character encodings)
-which are freely distributed with Acrobat Reader by Adobe Systems
-Incorporated.
-
-For detail of ToUnicode CMaps, refer
-<blockquote>
-Adobe Systems Incorporated,
-"PDF Reference, Third Edition, Version 1.4",
-p. 368
-<a
-href="http://partners.adobe.com/asn/developer/acrosdk/docs/filefmtspecs/PDFReference.zip"
-class="offsite">
-http://partners.adobe.com/asn/developer/acrosdk/docs/filefmtspecs/PDFReference.zip
-</a><br>
-Adobe Systems Incorporated,
-"ToUnicode Mapping File Tutorial",
-Technical Note #5411</a><br>
-<a
-href="http://partners.adobe.com/asn/developer/pdfs/tn/5411.ToUnicode.pdf"
-class="offsite">
-http://partners.adobe.com/asn/developer/pdfs/tn/5411.ToUnicode.pdf</a><br>
-</blockquote>
-ToUnicode and ToCode CMaps are designed for text-searching in PDF,
-and you should not expect Adobe ToUnicode CMap as a one-to-one map
-between Adobe glyph collection and glyph/character in Unicode.
-
-The current algorithm of Ghostscript to map CIDs to TTF glyph ID
-completely depends on Adobe CMaps, TrueType cmap and GSUB tables.
-
-<p>
-The current revision of on-the-fly CIDFontType 2 technology
-supports the following kinds Registry-Ordering (RO) of CID-keyed
-fonts:
-
-<tt><pre>
- [RO]
- Adobe-CNS1
- Adobe-GB1
- Adobe-Japan1
- Adobe-Japan2
- Adobe-Korea1
-</pre></tt><br>
-
-and doesn't support the following kinds of CID-keyed fonts:<br>
-
-<tt><pre>
- [RO]
- Adobe-CNS2
- Adobe-HongKong1
- Adobe-Korea2
- Adobe-Vietnam1
-</pre></tt><br>
-
-The current revision can handle the following kinds (Encoding in cmap
-table) of TrueType fonts as CID-keyed fonts:<br>
-
-<tt><pre>
- [Encoding] [RO]
- Unicode Adobe-*
- ShiftJIS Adobe-Japan1
- PRC Adobe-GB1
- Big5 Adobe-CNS1
- Wansung Adobe-Korea1
- Johab Adobe-Korea1
-</pre></tt><br>
-
-and doesn't support UCS-4 Encoding TrueType fonts for the present. In
-the case of Unicode Encoding, RO can be detected by reading ``Code
-Page Character Range'' of OS/2 table of TTF as follows:<br>
-
-<tt><pre>
- [Encoding] [Code Page] [RO]
- Unicode Japanese Adobe-Japan1
- Simplified Chinese Adobe-GB1
- Korean Wansung Adobe-Korea1
- Traditional Chinese Adobe-CNS1
- Korean Johab Adobe-Korea1
-</pre></tt><br>
-
-For each combination of RO and TTF Encoding, following Adobe CMaps are
-applied:<br>
-
-<tt><pre>
- [RO-Encoding] [Supplement limit]
- [used CMap] - [Comment]
-
- Adobe-CNS1-Big5 0
- Adobe-CNS1-ETen-B5 - ToCode CMap
- ETen-B5-V - ToCID CMap
- ETen-B5-H - ToCID CMap
-
- Adobe-CNS1-Unicode 3
- Adobe-CNS1-UCS2 - ToUnicode CMap
- UniCNS-UCS2-V - ToCID CMap
- UniCNS-UCS2-H - ToCID CMap
-
- Adobe-GB1-PRC 2
- Adobe-GB1-GBK-EUC - ToCode CMap
- GBK-EUC-V - ToCID CMap
- GBK-EUC-H - ToCID CMap
-
- Adobe-GB1-Unicode 4
- Adobe-GB1-UCS2 - ToUnicode CMap
- UniGB-UCS2-V - ToCID CMap
- UniGB-UCS2-H - ToCID CMap
-
- Adobe-Japan1-ShiftJIS 2
- Adobe-Japan1-90ms-RKSJ - ToCode CMap
- 90ms-RKSJ-V - ToCID CMap
- 90ms-RKSJ-H - ToCID CMap
-
- Adobe-Japan1-Unicode 4
- Adobe-Japan1-UCS2 - ToUnicode CMap
- UniJIS-UCS2-V - ToCID CMap
- UniJIS-UCS2-H - ToCID CMap
-
- Adobe-Japan2-Unicode 0
- UniHojo-UCS2-V - ToCID CMap
- UniHojo-UCS2-H - ToCID CMap
-
- Adobe-Korea1-Johab 1
- KSC-Johab-V - ToCID CMap
- KSC-Johab-H - ToCID CMap
-
- Adobe-Korea1-Unicode 2
- Adobe-Korea1-UCS2 - ToUnicode CMap
- UniKS-UCS2-V - ToCID CMap
- UniKS-UCS2-H - ToCID CMap
-
- Adobe-Korea1-Wansung 1
- Adobe-Korea1-KSCms-UHC - ToCode CMap
- KSCms-UHC-V - ToCID CMap
- KSCms-UHC-H - ToCID CMap
-</pre></tt><br>
-
-where Supplement values are denoted as the limit determined by the
-maximum CID in used CMaps.
-
-<p>
-The Glyph Substitution table (GSUB) of TTF, Single Substitution Format
-2 is read for vertically-used glyphs in CIDs. The current revision
-doesn't handle any other formats of GSUB, so handling ligatures and
-variants as CID-keyed fonts might be tasks to be solved in future.
-
-<p>
-In recent CID-keyed fonts, pre-rotated Latin glyphs are defined, but
-the current revision merely maps to normal Latin glyphs.
-Ghostscript cannot handle them at present.
-
-<h2><a name="Notes"></a>
-Adobe CIDs that current Ghostscript can fills by CJK TTF</h2>
-<p>
-Following tables and comments provide the details of validity and
-limitation for the individual kinds of CID-keyed fonts composed from
-generally-circulated and Unicode TrueType fonts at the current
-revision. Naturally, these results of glyphs lacking are affected by
-TrueType fonts you use.<br>
-
-<tt><pre>
-Adobe-CNS1 CID-keyed font composed from Traditional Chinese Unicode TTF
------------------------------------------------------------------------
-[ROS] [CID range] [Comment]
-Adobe-CNS1-0 0- 505 96,97,124-127,228,260 are lacking
- 506- 561 no problem
- 562- 594 all glyphs are lacking
- 595-13645 no problem
- 13646-13748 13646,13647 are lacking
- 13749-13998 13996-13998 are lacking
- 13999-14098 some glyphs are lacking
-Adobe-CNS1-1 14099-17407 lots of glyphs are lacking (*1)
-Adobe-CNS1-2 17408-17600 17503,17504 are lacking (*2)
-Adobe-CNS1-3 17601-17605 17603 is lacking
- 17606-18845 lots of glyphs are lacking (*3)
-Adobe-CNS1-4 18846-18961 all glyphs assignment is impossible (*4)
-(*1) HK GCCS
-(*2) not pre-rotated
-(*3) HK SCS
-(*4) HK SCS (unused in UniCNS-UCS-2 CMap, though used in UniCNS-UTF8,
-UniCNS-UTF16, UniCNS-UTF32, also ETHK-B5, needless to say HKscs-B5)
-
-
-Adobe-GB1 CID-keyed font composed from Simplified Chinese Unicode TTF
----------------------------------------------------------------------
-[ROS] [CID range] [Comment]
-Adobe-GB1-0 0- 939 99,695,698,737,935,938 are lacking
- 940- 7702 no problem
- 7703- 7716 7705,7708 are incorrect
-Adobe-GB1-1 7717- 9896 no problem
-Adobe-GB1-2 9897-22126 no problem
-Adobe-GB1-3 22127-22352 22347,22350,22352 are lacking (*1)
-Adobe-GB1-4 22353-22427 all glyphs are not available (*2)
- 22428-29058 all glyphs are not available (*3)
- 29059-29063 all glyphs are not available (*4)
-(*1) not pre-rotated
-(*2) additional Hiragana and Katakana, extended Bopomofo glyphs
-(*3) the Unified Han Ideographs Extension A
-(*4) pre-rotated glyphs
-
-
-Adobe-Japan1 CID-keyed font composed from Japanese Unicode TTF
---------------------------------------------------------------
-[ROS] [CID range] [Comment]
-Adobe-Japan1-0 0- 1124 lots of glyphs are lacking or incorrect:
- 96-98,127,128,130-133,135-137,226,326,
- 390,396,422,424,502,506-509,512,513,515,
- 606,607,632
- 1125- 7477 no problem
- 7478- 7632 7478 is lacking and 7608,7609 are incorrect
- 7633- 8004 lots of glyphs are lacking or incorrect (*4)
- 8005- 8283 lots of glyphs are lacking or incorrect:
- 8008,8053,8059-8061,8091,8102-8111,8166-8181,
- 8189,8190,8227-8229,8260
-Adobe-Japan1-1 8284- 8358 lots of glyphs are lacking or incorrect:
- 8295-8297,8300-8302,
- 8306,8307,8321,8322,8325,8326
-Adobe-Japan1-2 8359- 8717 no problem
- 8718- 8719 8718 is lacking and 8719 is incorrect
-Adobe-Japan1-3 8720- 9353 some glyphs are lacking or incorrect (*1)
-Adobe-Japan1-4 9354- 9737 some glyphs are lacking or incorrect (*2)
- 9738-13319 lots of glyphs are lacking or incorrect (*3)
- 13320-15443 all glyphs are variants or lacking (*4)
-(*1) not pre-rotated
-(*2) not italic form
-(*3) many ligature, pre-rotated, pre-rotated and italic form glyphs
-(*4) lots of variants are assigned substitutes
-
-
-Adobe-Japan2 CID-keyed font composed from Japanese Unicode TTF
---------------------------------------------------------------
-[ROS] [CID range] [Comment]
-Adobe-Japan2-0 0- 6067 no problem
-
-
-Adobe-Korea1 CID-keyed font composed from Korean Unicode TTF
-------------------------------------------------------------
-[ROS] [CID range] [Comment]
-Adobe-Korea1-0 0- 357 some glyphs are lacking or incorrect:
- 61,97,100,104,111,227
- 358- 3435 no problem
- 3436- 8055 no problem
- 8056- 8190 lots of glyphs are lacking or incorrect:
- 8059,8061,8075,8083-8085,8089,8091,8093,8190
- 8191- 9332 no problem
-Adobe-Korea1-1 9333-18154 perhaps no problem, but cannot check (*)
-Adobe-Korea1-2 18155-18351 some glyphs are lacking
-(*) Technical Note on Adobe-Korea1-1,2 has not been published yet[6].
-</pre></tt>
-
-<p>
-The current mapping algorithm based on ToCID CMaps and ToUnicode
-CMaps still has problems. The gs-cjk project[7] is considering how
-to settle the matters.
-
-
-<h2><a name="References"></a>References</h2>
-<ol>
-<li>Microsoft Corporation, "OpenType specification"
-<a
-href="http://www.asia.microsoft.com/typography/otspec/"
-class="offsite">
-http://www.asia.microsoft.com/typography/otspec/</a>
-</li>
-
-<li>
-Adobe Systems Incorporated,
-"Adobe-CNS1-4 Character Collection for CID-Keyed Fonts",
-Technical Note #5080
-<a
-href="http://partners.adobe.com/asn/developer/pdfs/tn/5080.Adobe-CNS1-4.pdf"
-class="offsite">
-http://partners.adobe.com/asn/developer/pdfs/tn/5080.Adobe-CNS1-4.pdf</a>
-</li>
-
-<li>
-Adobe Systems Incorporated,
-"Adobe-GB1-4 Character Collection for CID-Keyed Fonts",
-Technical Note #5079
-<a
-href="http://partners.adobe.com/asn/developer/pdfs/tn/5079.Adobe-GB1-4.pdf"
-class="offsite">
-http://partners.adobe.com/asn/developer/pdfs/tn/5079.Adobe-GB1-4.pdf</a>
-</li>
-
-<li>
-Adobe Systems Incorporated,
-"Adobe-Japan1-4 Character Collection for CID-Keyed Fonts",
-Technical Note #5078
-<a
-href="http://partners.adobe.com/asn/developer/pdfs/tn/5078.Adobe-Japan1-4.pdf"
-class="offsite">
-http://partners.adobe.com/asn/developer/pdfs/tn/5078.Adobe-Japan1-4.pdf
-</a>
-</li>
-
-<li>
-Adobe Systems Incorporated,
-"Adobe-Japan2-0 Character Collection for CID-Keyed Fonts",
-Technical Note #5097
-<a
-href="http://partners.adobe.com/asn/developer/pdfs/tn/5097.Adobe-Japan2-0.pdf"
-class="offsite">
-http://partners.adobe.com/asn/developer/pdfs/tn/5097.Adobe-Japan2-0.pdf
-</a>
-</li>
-
-<li>
-Adobe Systems Incorporated,
-"Adobe-Korea1-0 Character Collection for CID-Keyed Fonts"
-Technical Note #5093
-<a
-href="http://partners.adobe.com/asn/developer/pdfs/tn/5093.Adobe-Korea1-0.pdf"
-class="offsite">
-http://partners.adobe.com/asn/developer/pdfs/tn/5093.Adobe-Korea1-0.pdf
-</a>
-</li>
-
-<li>
-Taiji Yamada, "Tips on PostScript"
-<a href="http://www.aihara.co.jp/~taiji/tops/" class="offsite">
-http://www.aihara.co.jp/~taiji/tops/</a></li>
-
-<li>"gs-cjk project"
-<a href="http://www.gyve.org/gs-cjk/" class="offsite">
-http://www.gyve.org/gs-cjk/</a></li>
-</ol>
-
-
-<!-- [2.0 end contents] ==================================================== -->
-
-<!-- [3.0 begin visible trailer] =========================================== -->
-<hr>
-
-<font size=2>
-
-<p>Copyright &copy; 2001 Taiji Yamada &lt;<a href="mailto:taiji@aihara.co.jp">taiji@aihara.co.jp</a>&gt; and
-<a href="http://www.gyve.org/gs-cjk/" class="offsite">gs-cjk project</a>.
-<p>Copyright &copy; 2002 artofcode LLC. All rights reserved.
-
-<p>This file is part of GNU Ghostscript. See the
-<a href="COPYING">GNU General Public License</a> (the "License") for
-full details of the terms of using, copying, modifying, and redistributing
-GNU Ghostscript.
-
-<p>
-<small>Ghostscript version 7.07, 17 May 2003
-
-</font>
-
-<!-- [3.0 end visible trailer] ============================================= -->
-
-</body>
-</html>