Type 1 and CID Fonts
These functions are used to define the translation of a R graphics
font family name to a Type 1 or CID font descriptions, used by both
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a character string giving the name to be used internally
for a Type 1 or CID-keyed font family. This needs to uniquely
identify each family, so if you modify a family which is in use
a character vector of four or five strings giving paths to the afm (Adobe Font Metric) files for the font.
the name of a CMap file for a CID-keyed font.
The name of a character encoding to be used with the named CMap file: strings will be translated to this encoding when written to the file.
A chunk of PDF code; only required for using
a CID-keyed font on
Type1Fonts, if four ‘.afm’ files are supplied the
fifth is taken to be
"Symbol.afm". Relative paths are taken
relative to the directory ‘R_HOME/library/grDevices/afm’.
The fifth (symbol) font must be in
However, the glyphs in the first four fonts are referenced by name
and any encoding given within the ‘.afm’ files is not used.
The ‘.afm’ files may be compressed with (or without) final extension ‘.gz’: the files which ship with R are installed as compressed files with this extension.
Glyphs in CID-keyed fonts are accessed by ID (number) and not by name.
The CMap file maps encoded strings (usually in a MBCS) to IDs, so
cmapEncoding specifications must match. There
are no real bold or italic versions of CID fonts (bold/italic were
very rarely used in traditional East Asian topography), and for the
postscript device, bold and italic (and
bold italic) are emulated.
CID-keyed fonts are intended only for use for the glyphs of East Asian
languages, which are all monospaced and are all treated as filling the
same bounding box. (Thus
plotmath will work with such
characters, but the spacing will be less carefully controlled than
with Western glyphs.) The CID-keyed fonts do contain other
characters, including a Latin alphabet: non-East-Asian glyphs are
regarded as monospaced with half the width of East Asian glyphs. This
is often the case, but sometimes Latin glyphs designed for
proportional spacing are used (and may look odd). We strongly
recommend that CID-keyed fonts are only used for East Asian
A list of class
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## This duplicates "ComputerModernItalic". CMitalic <- Type1Font("ComputerModern2", c("CM_regular_10.afm", "CM_boldx_10.afm", "cmti10.afm", "cmbxti10.afm", "CM_symbol_10.afm"), encoding = "TeXtext.enc") ## Not run: ## This could be used by postscript(family = CMitalic) ## or postscriptFonts(CMitalic = CMitalic) # once in a session postscript(family = "CMitalic", encoding = "TeXtext.enc") ## End(Not run)