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[This is ./doc/fonts/ibycus4/tex/README
12 July, 1997. [For some of the previous history see the
final notes on Ibycus 3, from May 30, 1966 in README.ibycus3]
( THIS IS A TDS-CONFORMANT PACKAGE )
BE SURE THAT ibycus4.map HAS BEEN MADE ACCESSIBLE AS DESCRIBED BELOW
FOR INCOMPATIBILITIES WITH IBYCUS3, SEARCH FOR %%%%%%%%%%%% on page 3.
Like its predecessors, Ibycus4 is based on Silvio Levy's
realization of a classic Didot cut of Greek type from around 1800.
Ibycus4 is as close as possible to Ibycus3 in all possible
respects, but there are some improved set widths and pair-kernings
which might clobber old carefully adjusted text spacings
such as Alexandrian shaped poetry.
A sample input file is provided in iby4text.tex or ibycus4.ltx
PLAIN TeX USAGE: \input iby4text
then: \setgreek10/12 (or other reasonable combination
of pointsize and leading)
then: Latin text \GK{}a)rxai=a gra'mmata\RM{} Latin again.
NOTE that the ) is a smooth breathing, not a parenthesis.
LaTeX2e USAGE: \usepackage{ibycus4}
then: Latin text {\greek{a)rxai=a gra'mmata}} Latin again.
(Note the double braces, there is a font change here.)
change font size with the \fontsize macro, thus:
\fontsize{14}{17pt}\selectfont
The TeX files in $TEXMF/tex/generic/ibycus4 together with the METAFONT
files in $TEXMF/fonts/source/public/ibycus4 {\em especially
ibycus4.map} are intended to provide a reasonable degree of
compatibility between David Packard Jr.'s Ibycus/TLG system, and the
TeX and METAFONT environment. If you are not using Karl Berry's
path-searching or its equivalent, these TeX files may have to be moved
to an appropriate branch directory of $TEXMF/tex/
continues . . .
README Page 2
The TeX files are:
1. $TEXMF/tex/generic/ibycus4/ibycus4.tex
The driver file for this package (in plain tex).
1a. $TEXMF/tex/generic/ibycus4/ibycus4.sty
The driver file for this package (in LaTeX2e).
2. $TEXMF/tex/generic/ibycus4/setiby4.tex
Included by ibygrk.tex unless newnep format is running
3. $TEXMF/tex/generic/ibycus4/tlgsqq.tex
The name suggests the association with coding of the
Thesaurus Linguae Graecae.
This file provides uniquely named macros for all combinations
of letter and accent, so that any invocation of the macro will
produce a sequence of characters corresponding with the
entries put into the TFM ligature table. These sequences may
always be used to generate accented characters. They are
based, with some slight modifications where David Packard's Ibycus
input coding seems too misleading, on the Ibycus adaptation of
TLG beta-code.
For input coding, the parentheses, ) and ( are used for
breathings, ' (ASCII char '047--acute or single quote) and `
(ASCII char '140--grave) are used for oxytone and barytone (to
avoid preemption of the usual TeX excape character) and =
(ASCII char '075) is used for perispomenon to avoid preemption
of the active tie character in plain.tex. + is used for
dieresis after u or i and for some other special characters.
| is used for iota subscript and ! (ASCII char '041--\bang) is
used to call out the "dot-under" convention for partially
preserved letters in manuscript or epigraphical texts. Order
is significant. Breathings or diereses come first, after the
affected letter, then accents, then iota subscript or \bang.
These codings represent the input coding convention, not the
mapping in the font itself.
The digraphs, trigraphs etc. can be read from tlgsqq.tex
Postpositives fall into three order-dependent and
exclusive classes--only one from each class may be used
in any single accented cluster.
1 2 3
nil nil nil
( [asper] ' [oxytone] | [iota subscript]
) [lenis] ` [barytone] ! [dot below letter]
+ [other] = [perispomene]
continues . . .
README Page 3
Some special digraphs are K+ Koppa, k+ koppa, C+ lunate Cigma,
c+ lunate cigma, s+ sampi (lowercase late form only) and s| which
forces a medial sigma.
<< and >> give guillemets (not guillemots as Adobe
ornithologically supposes) and (( )) give single parentheses
though care must be taken that the first ( or ) is not
interpreted as a breathing. {((} and {))} are safe.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
NOTE: THE FOLLOWING CODINGS ARE NOT COMPATIBLE WITH IBYCUS3
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
I have tried to keep incompatible codings to the minimum
but the ibycus3 versions of the following were extremely
undesirable. These are all simplifications of ibycus3 coding.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
The mark of elision is ' or {'} (the form in braces may be
needed to prevent ' from being read as an accent).
Single quotes may be provided by ` {`} and ' {'}, (isolate them
in braces if necessary). Double quotes are `` {``} and
'' {''} (isolate in braces if necessary). < and > are the
angle brackets used for conjectural supplements.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4. ibycus4.map
This is {\em exactly} the same file as is used by METAFONT.
Copy $TEXMF/fonts/source/public/ibycus4/ibycus4.map
to the same directory as ibycus4.tex
or, even better, link it with a symbolic link.
It is so structured that it can be read by either
TeX or Metafont. The mapping is very close to that of GreekKeys,
which is distributed for the Macintosh by the American
Philological Association. Other mappings can be created
in the same manner.
5. $TEXMF/tex/generic/ibycus4/Uibycus4.fd
Supporting fd file for LaTeX2e.
6. $TEXMF/tex/generic/ibycus4/iby4extr.tex
Access to some editorial symbols for classical editions.
continues . . .
README Page 4
7. $TEXMF/tex/generic/ibygrk/ibycus4.ltx
$TEXMF/tex/generic/ibygrk/iby4text.tex
The exquisite little poem by Ibycus of Rhegium, until recently
almost the only thing known by him. (The Ibycus system
developed by David Packard is only indirectly named after
the poet. The direct inspiration was Packard's cat.)
M E T A F O N T
The METAFONT part of the package consists of a set of files which use
the original characters of Silvio Levy's greek fonts and combine them
in ways which reflect the increased capabilities of TeX and METAFONT
developed since Levy did the original greek for TeX. The Levy source
files can be got from one of the CTAN archives and placed in
$TEXMF/fonts/source/public/levy
where they will automatically become
accessible if you are using a TeX Directory Structure [TDS] layout of
files. If you are not using a file searching system like Karl Berry's
"kpathsea", see $TEXMF/fonts/source/public/ibycus4/ibycus4.mf for
hints on making the Levy source available. For directions on the
use and management of Karl Berry's path searching, consult "The TeX
Live Guide, version 2" by Sebastian Rahtz and Michael Goosens, in
{\it TUGboat}. Volume 18 (1997). Pages 81-112, especially pp. 87--9.
Web2c TeX for Unix systems, Thomas Esser's teTeX, and the Solaris package
referenced at http://smc.vnet.net/solaris_2.5.html all use Karl
Berry's path searching.
Ibycus4 METAFONT files are in $TEXMF/fonts/source/public/ibycus4
The most significant changes are:
1. The large repertory of initial/medial sigma + letter pairs
is suppressed from the new fonts, and the new enhanced TFM
ligature scheme is used instead to provide for the automatic
differentiation between medial and final sigma.
2. The cells thus opened up in the font mapping are used for
a variety of additional characters:
a. A full repertory of vowels with breathings and
barytone accents (many of these were absent from the
original). The various forms of long epsilon and
omicron with perispomene accent needed for early Attic
and similar local scripts are provided.
b. Lunate sigma, digamma, koppa and sampi are
provided (the last in its lowercase late form
only, since earlier forms are rather problematic
and are virtually unused even in epigraphical texts).
c. A simple iota subscript in a 0.5em character space
is provided at position '174 for use in unusual
continues . . .
README Page 5
groupings. For all normal usages three additional
occurences of the glyph are kerned (in the traditional
sense) far to the left so that they will fit under
alpha, eta and omega respectively. These characters
are called out automatically through the TeX TFM
ligature system, for which see below. The glyph under
eta is shortened slightly to give better clearance
under the left stem of lowercase eta. The iota
subscript glyph retains its simple form in 300dpi
renditions, and in any bitmap which drops below
500dpi, but it thins out and develops a slight
rightward hook at 600dpi and above.
d. The mechanism of drastic left kerning is also used
to set dots under letters which cannot be read
completely from the manuscript or stone. These dota
are likewise called out automatically through the TFM
ligature system. A final ! {\bang} after any letter
or letter with postpositive accents (except those
with iota subscripts) will produce the dotted form.
e. Angle brackets, half brackets, double quotes, braces,
a dagger and a doubledagger are now provided (see
iby4extr.tex).
3. All characters have been named. The constructs
ASCII"A" and oct"000" appear only at lower levels
of programming.
4. Character spacing has been adjusted through kerning tables,
particularly around lowercase iota (file ibylig4.mf).
There is better separation between breathings and accents
(this has required a redesign of almost all accents) and
clearance between accent and base letter has been increased.
The perispomene has been restored to its traditional form with
a thick center and tapered ends, and the breathings have been
given shorter, tapered tails. The deep ink trap between the
bulb and tail of the breathings has been eliminated. Accents
over epsilon have been raised and slightly shortened to give
better clearance. The accents with diaeresis have been shifted
up and laterally to clear the dot they lean toward.
5. Font mapping is specified independently of other
parameters, in a distinct and separate file (file ibycus4.map).
In some cases it may be more effective to remap the font
than to struggle with TeX remapping.
continues . . .
README Page 6
6. A programming error which produced the wrong displacement
value with free-standing accents has been corrected. Accents
before uppercase vowels are kerned (in the traditional sense)
out left to a negative left side bearing of about one unit
(1/18em) unit so that their escapement does not leave
excessive space after the preceding word or at the start of a
line. They have also been properly pair-kerned with the
uppercase vowels.
A new naming convention uses "ibycus4" wherever possible, and
the shorter string "iby4" where that would lead to ambiguity.
some of the individual METAFONT character files are simply
taged with the number 4. 8+3 filename compatibility is preserved.
(under protest and with difficulty).
The names of PK and TFM files follow Karl Berry's font name convention
( 84 is the encoding for Ibycus 4).
Foundry Facename Weights Variants Encoding_Variants DesignSize
f ib [r], b r, o 84 [10], 9, 8
fibr84 fibo84 fibb84
with METAFONT design-size additions
fibr848 fibo848 fibb848
fibr849 fibo849 fibb849
Driver files for the Bold Oblique variant can be provided but their use
is discouraged. These Didot-derived characters do not stand up well
to either boldfacing or obliqueing, and the combination is quite
unfortunate. The typewriter style originally offered with these
designs is quietly forgotten, although the code for it is still
embedded in Silvio Levy's source.
Also in the works, a type1 version.
Pierre A. MacKay
Department of Classics
University of Washington
mackay@cs.washington.edu
|
