SECTION 5.6
451
Composite Fonts
1 beginnotdefrange
< 00 >
< 1F >
231
endnotdefrange
100 begincidrange
< 20 >
< 7D >
231
< 7E >
< 7E >
631
< 8140 > < 817E > 633
< 8180 > < 81AC > 696
< 81B8 > < 81BF > 741
< 81C8 > < 81CE > 749
… Additional ranges …
< FB40 > < FB7E > 8518
< FB80 > < FBFC > 8581
< FC40 > < FC4B > 8706
endcidrange
endcmap
CMapName currentdict /CMap defineresource pop
end
end
%%EndResource
%%EOF
endstream
endobj
As can be seen from this example, a CMap file conforms to PostScript language
syntax; however, a full PostScript interpreter is not needed to interpret it. Aside
from some required boilerplate, the CMap file consists of one or more occur-
rences of several special CMap construction operators, invoked in a specific
order. Following is a summary of these operators:
begincmap
and
endcmap
enclose the CMap definition.
usecmap
incorporates the code mappings from another CMap file. In PDF, the
other CMap must also be identified in the
UseCMap
entry in the CMap dictio-
nary (see Table 5.17 on page 448).
begincodespacerange
and
endcodespacerange
define
codespace ranges—the
valid input character code ranges—by specifying a pair of codes of some partic-
ular length giving the lower and upper bounds of each range; see “CMap Map-
ping” on page 453.
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