SECTION 5.5
423
Simple Fonts
PDF consumer application prints to a PostScript output device. This applies par-
ticularly to the operands of the
d0
and
d1
operators, which in PostScript are
named
setcharwidth
and
setcachedevice
. For further explanation, see Section 5.7
of the
PostScript Language Reference,
Third Edition.
TABLE 5.10 Type 3 font operators
OPERANDS
OPERATOR
DESCRIPTION
w
x
w
y
d0
Set width information for the glyph and declare that the glyph descrip-
tion specifies both its shape and its color. (Note that this operator name
ends in the digit
0
.)
w
x
specifies the horizontal displacement in the glyph
coordinate system; it must be consistent with the corresponding width
in the font’s
Widths
array.
w
y
must be 0 (see Section 5.1.3, “Glyph Posi-
This operator is permitted only in a content stream appearing in a
Type 3 font’s
CharProcs
dictionary. It is typically used only if the glyph
description executes operators to set the color explicitly.
w
x
w
y
ll
x
ll
y
ur
x
ur
y
d1
Set width and bounding box information for the glyph and declare that
the glyph description specifies only shape, not color. (Note that this
operator name ends in the digit
1
.)
w
x
specifies the horizontal displace-
ment in the glyph coordinate system; it must be consistent with the
corresponding width in the font’s
Widths
array.
w
y
must be 0 (see Section
ll
x
and
ll
y
are the coordinates of the lower-left corner, and
ur
x
and
ur
y
the
upper-right corner, of the glyph bounding box. The glyph bounding box
is the smallest rectangle, oriented with the axes of the glyph coordinate
system, that completely encloses all marks placed on the page as a result
of executing the glyph’s description. The declared bounding box must be
correct—in other words, sufficiently large to enclose the entire glyph. If
any marks fall outside this bounding box, the result is unpredictable.
A glyph description that begins with the
d1
operator should not execute
any operators that set the color (or other color-related parameters) in the
graphics state; any use of such operators is ignored. The glyph descrip-
tion is executed solely to determine the glyph’s shape. Its color is deter-
mined by the graphics state in effect each time this glyph is painted by a
text-showing operator. For the same reason, the glyph description may
not include an image; however, an image mask is acceptable, since it
merely defines a region of the page to be painted with the current color.
This operator is permitted only in a content stream appearing in a
Type 3 font’s
CharProcs
dictionary.