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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