Defoma specific document.
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Font configuration of gs is now controlled by Defoma.
If you want to update the font configuration, run:
  defoma-app update gs
then the Defoma-configuration script for gs is called.

Following describes what the Defoma-configuration script for gs does.

gs accepts type1, type3, gsfontderivatice, truetype, cid, cmap and psprint 
categories.
gs registered all PostScript fonts available to gs in postscript category
with <gs>/ added to the top of their names.

gs creates files under /var/lib/defoma/gs.d/dirs.
This directory contains CMap and fonts subdirectories, and CMap subdirectory
is symlinked under /usr/share/ghostscript. 

If you want to have a certain PostScript font name which is not provided
by registered fonts as RealName or Alias, you can have such a font name
substituted. Run
  defoma-subst edit-rule ghostscript
to edit the subst-rule. 
For example, if you want to have Charter-Bold available whose charset is
ISO8859-1 and which has serifed, propotional widthed bold face, you should
add the following line:
Charter-Bold --Charset,* ISO8859-1 --GeneralFamily Roman --Weight Bold \
  --Width Variable --Shape Upright Serif

Then Charter-Bold will be substituted by the most similar font and become 
available.

The way to have CJK font substituted changes compared to the old gs-aladdin
(6.50-x).
If you want to have Korean PostScript font, Dotum-Medium-KSC-EUC-H available 
whose actual font name is Dotum-Medium and KSC-EUC-H is a name of CMap,
you should add the following line:
Dotum-Medium --CIDRegistry,* Adobe --CIDOrdering,* Korea1 --Weight Medium \
  --Suape Upright

Then Dotum-Medium-* (* is a name of Korean CMap) are substituted and become
available.

Following is a list of hinttypes specific to gs.
* GS-OriginFont, GS-OriginID: These hinttypes are used in 
  gsfontderivative category. Substance of a font within this 
  category is a small PostScript program that generates a 
  derivative font from a certain substantial type1 or type3 font.
  Generally a derivative font has bold or oblique shape, while
  the original font has normal upright shape.
  A font within this category must specify the original font and
  its RealName with GS-OriginFont and GS-OriginID hinttypes.

1. type1 and type3
Fonts within this category are handled in the same way. Symlink to the 
fontfile is created under /var/lib/defoma/gs.d/dirs/fonts, and its font name,
font file and alises are listed in Fontmap.

2. gsfontderivative
Fonts within this category are handled in the similar way. Only one 
difference is that dependency on the origin of the font is registered when 
fonts are registered to Id cache.

3. truetype
Fonts within this category are handled in the same way as type1 and
type3 if the font doesn't include CJK glyphs. CJK truetype fonts goes
different. It is treated as a cid font.

4. cid
Symlink to the font file is created under /var/lib/defoma/gs.d/dirs/fonts,
and its font name, font file and aliases are listed in CIDFnmap.
Using registered CMaps which belong to the same CIDRegistry and CIDOrdering,
<CID-FontName>-<CMapName> are registered in postscript category.

5. cmap
Symlink to the CMap file is created under /var/lib/defoma/gs.d/dirs/CMap.
Using registered CID fonts which belong to the same CIDRegistry and 
CIDOrdering, <CID-FontName>-<CMapName> are registered in postscript category.

6. psprint
Fonts installed in a PostSciprt printer should be previewable by ghostscript.
They are registered to psprint category, so the script accepts this category
and add the fonts and their hints to a subst-rule.