SECTION 5.2
397
Text State Param eters and Operators
TABLE 5.1 Text state parameters
PARAMETER
DESCRIPTION
T
c
T
w
T
h
T
l
T
f
T
fs
T
mode
T
rise
T
k
Character spacing
Word spacing
Horizontal scaling
Leading
Text font
Text font size
Text rendering mode
Text rise
Text knockout
Except for the self-explanatory
T
f
and
T
fs
, these parameters are discussed further
in the following sections. (As described in Section 5.3, “Text Objects,” three addi-
tional text-related parameters are defined only within a text object:
T
m
, the text
matrix;
T
lm
, the text line matrix; and
T
rm
, the text rendering matrix.) The values
of the text state parameters are consulted when text is positioned and shown
(using the operators described in Sections 5.3.1, “Text-Positioning Operators,”
and 5.3.2, “Text-Showing Operators”). In particular, the spacing and scaling
parameters participate in a computation described in Section 5.3.3, “Text Space
Details.” The text state parameters can be set using the operators listed in Table
5.2.
Note:
The text knockout parameter,
T
k
, is set through the
TK
entry in a graphics
state parameter dictionary by using the
gs
operator (see Section 4.3.4, “Graphics
State Parameter Dictionaries”). There is no specific operator for setting this parame-
ter.
The text state operators can appear outside text objects, and the values they set
are retained across text objects in a single content stream. Like other graphics
state parameters, these parameters are initialized to their default values at the
beginning of each page.
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