SECTION 8.4
645
Anno ta tions
TABLE 8.42 Entries in a fixed print dictionary
KEY
TYPE
VALUE
Type
Matrix
name
array
(Required)
Must be
FixedPrint
.
(Optional)
The matrix used to transform the annotation’s rectangle before ren-
dering.
Default value: the identity matrix
[ 1 0 0 1 0 0 ]
.
Note:
When positioning content near the edge of a page, it is recommended that
this entry be used to provide a reasonable offset to allow for nonprintable margins.
H
number
(Optional)
The amount to translate the associated content horizontally, as a per-
centage of the width of the target media (or if unknown, the width of the page’s
MediaBox
). 1.0 represents 100% and 0.0 represents 0%. Negative values are not
recommended, since they may cause content to be drawn off the page.
Default value: 0.
V
number
(Optional)
The amount to translate the associated content vertically, as a per-
centage of the height of the target media (or if unknown, the height of the page’s
MediaBox
). 1.0 represents 100% and 0.0 represents 0%. Negative values are not
recommended, since they may cause content to be drawn off the page.
Default value: 0.
When rendering a watermark annotation with a
FixedPrint
entry, the following
behavior occurs:
The annotation’s rectangle (as specified by its
Rect
entry) is translated to the or-
igin and transformed by the
Matrix
entry of its
FixedPrint
dictionary to produce
a quadrilateral with arbitrary orientation.
The
transformed annotation rectangle
is defined as the smallest upright rectan-
gle that encompasses this quadrilateral; it is used in place of the annotation
rectangle referred to in steps 2 and 3 of Algorithm 8.1 on page 612.
In addition, given a matrix
B
that maps a scaled and rotated page into the default
user space, a new matrix is computed that cancels out
B
and translates the origin
of the printed page to the origin of the default user space. This transformation is
applied to ensure the correct scaling and alignment.
Example 8.10 shows a watermark annotation that prints a text string one inch
from the left and one inch from the top of the printed page.
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