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authorKarl Berry <karl@freefriends.org>2011-05-30 22:56:05 +0000
committerKarl Berry <karl@freefriends.org>2011-05-30 22:56:05 +0000
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tree72bded22d7aa832a9cf702d76686f8c8670b5f3b /Master/texmf-dist/doc/latex
parent98089aa15f7c449ac60349d745f1aa0d666e4324 (diff)
rm em, european modern fonts not included
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-European Modern (EM) package for LaTeX:
-========================================
-
- CM style fonts - but with accented characters - in Adobe Type 1 format.
-
- Copyright 1997 Y&Y, Inc.
- Parts Copyright 1997 David Carlisle
-Important Note:
-===============
-
-The LaTeX PSNFSS support files for "European Modern" (EM) fonts on
-their own are not useful without the actual fonts. The EM font set
-itself is available from Y&Y, Inc.
-
-Background:
-===========
-
-Do you:
-
- (1) like the look of Computer Modern (CM) fonts; but
- (2) need ready-made accented characters for proper hyphenation; and
- (3) need scalable outline fonts (a.k.a. `PostScript' or `ATM' fonts)?
-
-Then the EM font set is for you. The character shapes are from Computer
-Modern, yet the glyph complement is much larger -- including numerous
-ready-made accented and composite characters -- and the fonts are in
-scalable Adobe Type 1 format (as opposed to METAFONT based PK bitmaps).
-
-The EM fonts also satisfy the needs of non-TeX users desireous of the CM
-look, because they appear to the operating system as plain vanilla text
-fonts, and so can be easily used with applications other than TeX.
-
-The EM font set:
-================
-
-The EM font set contains 57 text fonts based on the text fonts in Knuth's
-Computer Modern font (CM) set. It also contains 13 math italic fonts based
-on the math italic fonts in CM and AMS font sets. The EM text fonts
-have a much larger glyph set than the corresponding CM fonts.
-
-Each CM text font has about 117 usable glyphs for text (plus eleven
-Greek letters). The EM fonts add over 90 ready-made composites and
-numerous other `missing' glyphs to bring the total number of glyphs to
-over 300. This makes it possible, e.g., to use these fonts with
-T1 (Cork) encoding, or LY1 (TeX 'n ANSI) encoding, or LM1 (Textures)
-encoding. The AFM files show the actual glyph complement available.
-
-Note that the EM fonts are set up as normal text fonts, unlike the CM fonts --
-all of which have to be set up as pi/math/symbol/decorative/non-text since
-CM fonts use there own unusual character layout and do not have anywhere
-near the `standard' complement of 228 glyphs expected of a text font.
-
-Treated as text fonts, the EM fonts are reencoded to platform
-specific encoding when installed on operating systems with
-system-level support for scalable fonts, such as Windows and Macintosh.
-Consequently, for optimum use with TeX, you need a system that can
-reencode fonts `on the fly' (or you need to `hard reencode' the PFB
-and PFM files using the REENCODE and AFMtoPFM utilities, or use the
-reencoding feature of psfonts.map for DVIPS when printing to PS printers).
-
-The EM text fonts are used in conjunction with some of the CM math fonts.
-CM math fonts do not contain upright uppercase Greek letters -- these are
-normally taken from the roman text fonts (CMR* and CMBX*). Included in the EM
-font set are EMMI* math italic fonts which have these irksome upright
-uppercase Greek letters in character code positions 208 - 218. Note that
-this is the same scheme used in the MathTime font set, and similar to the
-scheme used with the Lucida Bright + Lucida New Math font set when the Lucida
-Bright Expert set is not available.
-
-The names of the EM fonts are derived directly from those of the CM fonts.
-So, for example, EMR17 is based on CMR17 --- with close to two hundred
-glyphs added. And EMMI10 is based on CMMI10 --- with upright Greek added.
-
-Relation to the EC font set:
-============================
-
-The "European Computer Modern" (EC) font set was defined to add
-ready-made accented characters to CM, including those needed for some
-Eastern European languages. In order to make space for these
-characters, many typographically important glyphs had to be banished
-to "text companion" (TC) fonts.
-
-The new EM font set differs from the EC font set in several ways:
-
-(1) The EC font set is unmanageably large (500 to 600 fonts), making it
- unlikely that a well hinted version will become available, and
- cluttering operating system files with font listings.
-
-(2) The EC font set uses fixed encoding, just like CM fonts, except
- it is hard wired to T1/Cork encoding instead of OT1/TeX Text encoding.
- This means it is less flexible and harder to use with non-TeX applications.
-
-(3) EC fonts are hard-wired for T1/Cork encoding.
- EM text fonts have a larger glyph complement covering several encodings
- including T1, LY1, LM1, Windows ANSI, and various ISO standard encodings.
-
-(4) The metric files for EC fonts have a problem with kerning for
- quotation marks. The EM fonts are setup to deal correctly with
- "boundary character" kerning for both left and right quotation marks.
-
-(5) The metric files for EC fonts include a few errors, such as incorrect
- sign on a few kerning pairs. These have been fixed in the EM font set.
-
-(6) The EM fonts use the old germandbls from the CM fonts instead of the
- redesigned one in EC.
-
-(7) The EM font metrics match the CM font metrics exactly for characters that
- occur in CM. EC font metrics differ slightly from CM.
-
-As a result EM is not a "drop in" replacement for EC - it is better.
-
-NOTE: the following is largely adapted from David Carlisle's type1cm.txt
-
-Using the LaTeX support for the EM font set
-===========================================
-
-The default way of using the `em' package is as a LaTeX package file.
-Install em.sty as described below and then just add
-
-\usepackage[T1]{em} or \usepackage[LY1]{em} or \usepackage[LM1]{em}
-
-to your document. This will override the definitions for all the fonts
-and so the standard fd files are not used. This will cause LaTeX
-to use the em fonts, and will also call the fontenc package to switch
-to the requested encoding (T1/Cork, or LY1/TeXnANSI, or LM1/Mac).
-
-Installation Instructions:
-==========================
-
-IMPORTANT NOTE: we supply a ready-made em.sty file so the following
-`unpacking' is actually not normally needed; unless you require some
-particular customization.
-
-The installation is controlled by the file em.ins which you may want to
-edit in two places.
-
-1) If you do not have the AMS Font set available in scalable form then
- remove the `%' from the line %\def\ams{}
- This will cause a more restricted font specification to be used.
-
- If you do not have the `AMS Extra' font set available in scalable form
- (i.e. msam6, msam8 and msam9 in addition to msam5, msam7 and msam10)
- then remove the `%' from the line %\def\ams{ams}
-
-2) If after reading the warning above regarding *.fd files, you decide to
- make a set of fd files, remove the `%'from the line %\makefdtrue
-
-Then run TeX (or LaTeX) on the file em.ins. A package file em.sty (and
-perhaps a set of fd files - see above) will be produced which you should
-place in a directory where TeX looks for input files. (Alternatively, add
-the directory containing these files to the list in the TEXINPUTS
-environment variable; or the format specific environment variable LATEX).
-
-Appendix A: Font sizing -- discrete or continuous?
-==================================================
-
-LaTeX separates its internal notion of font specification from the external
-fonts available on the system by means of `Font Shape Specifications', that
-are normally held in `Font Descriptor' (fd) files.
-
-The fd files that come with LaTeX that refer to the standard Computer Modern
-set (and the related AMS set) are based on the classical bitmap fonts which
-are available in discrete `magstep' sizes only. For instance, the
-specification of the main roman font is
-
- \DeclareFontShape{OT1}{cmr}{m}{n}
- { <5> <6> <7> <8> <9> <10> <12> gen * cmr
- <10.95> cmr10
- <14.4> cmr12
- <17.28><20.74><24.88>cmr17}{}
-
-which says that no font is available at 10.5pt (LaTeX will substitute the
-nearest available size if you ask for this) and similarly the font is not
-available at all above 25pt.
-
-Such restrictions are essential with bitmap fonts to save generating huge
-numbers of bitmaps for any size that might be requested, however with
-scalable versions of the fonts these restrictions are not really needed.
-For instance the equivalent definition here is:
-
-\DeclareFontShape{LY1}{cmr}{m}{n}{
- <-6> emr5
- <6-7> emr6
- <7-8> emr7
- <8-9> emr8
- <9-10> emr9
- <10-12> emr10
- <12-17> emr12
- <17-> emr17
- }{}
-
-which means that you can (although some may consider it bad style) go
-\fontsize{10.345pt}{12pt}\selectfont and be given a suitably scaled version of
-emr10 and a baseline setting of 12pt. Similarly if you really want, you can
-go \fontsize{2cm}{2.5cm}\selectfont and use emr17 scaled to 2cm height for a
-special display context.
-
-Appendix B: Technical note about the Font Shape specifications used:
-==========================================================================
-
-David Carlisle consistently specifies that given a requested size, the
-largest available font size smaller than (or equal to) the requested size
-should be used and then enlarged to the requested size. The exception being
-sizes smaller than the smallest available font, which use a reduced version
-of that font. The rationale for this is that enlarging a small font
-typically produces a rather `fat' font, but something readable, whereas
-shrinking a font may produce something unreadable quite quickly, particulary
-since the strokes in Computer Modern - and hence European Modern - are
-already quite thin.
-
-So for msam (if `extra' is not specified) he used:
-
-\DeclareFontShape{U}{msa}{m}{n}{
- <-7> msam5
- <7-10> msam7
- <10-> msam10
- }{}
-
-That is, for sizes strictly below 7pt use msam5, 7pt to (less than) 10pt
-use msam7 and sizes 10pt and above use msam10.
-
-This differs from the specification that the AMS use for the scalable
-AMS fonts (used by the psfonts option to the amsfonts package). They use
-
-\DeclareFontShape{U}{msa}{m}{n}{
- <-6> msam5
- <6-8> msam7
- <8-> msam10
- }{}
-
-This scheme has the advantage of minimising the scaling used, so for instance
-a 9pt request is satisfied by msam7 scaled up to 9 by this package, but by
-msam10 scaled down to 9 by the AMS package.
-
-In practice this is not likely to make a difference that anyone might notice,
-but it could in principle affect line breaks etc, so David thought that it
-should be mentioned here.
-
---------------------------------------------------------------------------------
-(TM) European Modern is a trademark of Y&Y, Inc. http://www.YandY.com
--------------------------------------------------------------------------------- \ No newline at end of file