CHAPTER 8
632
Interactive Features
KEY
TYPE
VALUE
RD
rectangle
(Optional; PDF 1.5)
A set of four numbers describing the numerical differences
between two rectangles: the
Rect
entry of the annotation and the actual bound-
aries of the underlying square or circle. Such a difference can occur in situations
where a border effect (described by
BE
) causes the size of the
Rect
to increase be-
yond that of the square or circle.
The four numbers correspond to the differences in default user space between
the left, top, right, and bottom coordinates of
Rect
and those of the square or cir-
cle, respectively. Each value must be greater than or equal to 0. The sum of the
top and bottom differences must be less than the height of
Rect
, and the sum of
the left and right differences must be less than the width of
Rect
.
Polygon and Polyline Annotations
Polygon annotations (PDF 1.5)
display closed polygons on the page. Such poly-
gons may have any number of vertices connected by straight lines.
Polyline anno-
tations (PDF 1.5)
are similar to polygons, except that the first and last vertex are
not implicitly connected.
TABLE 8.29 Additional entries specific to a polygon or polyline annotation
KEY
TYPE
VALUE
Subtype
name
array
array
(Required)
The type of annotation that this dictionary describes; must be
Polygon
or
PolyLine
for a polygon or polyline annotation, respectively.
(Required)
An array of numbers representing the alternating horizontal and ver-
tical coordinates, respectively, of each vertex, in default user space.
(Optional; meaningful only for polyline annotations)
An array of two names spec-
ifying the line ending styles. The first and second elements of the array specify
the line ending styles for the endpoints defined, respectively, by the first and last
pairs of coordinates in the
Vertices
array. Table 8.27 shows the possible values.
Default value:
[ /None /None ]
.
(Optional)
A border style dictionary (see Table 8.17 on page 611) specifying the
width and dash pattern to be used in drawing the line.
Note:
The annotation dictionary’s
AP
entry, if present, takes precedence over the
Vertices
and
BS
entries; see Table 8.15 on page 606 and Section 8.4.4, “Appearance
Vertices
LE
BS
dictionary