APPENDIX F
1046
Linearized PDF
ITEM
SIZE (BITS)
DESCRIPTION
4
See Table F.5, item 5
A number equal to 1 less than the number of objects in the group. The first
object of the first page is the one whose object number is given by the
O
entry
in the linearization parameter dictionary at the beginning of the file. Object
numbers for subsequent entries can be determined by accumulating the
number of objects in all previous entries until all shared objects in the first
page have been enumerated. Following that, the first object in the shared
objects section has a number that can be obtained from the header section of
the shared object hint table (Table F.5, item 1). (See also implementation note
Note:
In a document consisting of only one page, all of that page’s objects are never-
theless treated as if they were shared; the shared object hint table reflects this. (See
F.3.3 Thumbnail Hint Table
The thumbnail hint table consists of a header section (Table F.7) followed by the
thumbnails section, which includes one or more per-page entries (Table F.8), each
of which describes the thumbnail image for a single page. The entries are in page
number order starting with page 0, even if the document catalog contains an
OpenAction
entry that specifies opening at some page other than page 0. Thumb-
nail images may exist for some pages and not for others.
TABLE F.7 Thumbnail hint table, header section
ITEM
SIZE (BITS)
DESCRIPTION
1
2
3
4
5
6
32
32
32
16
32
16
The object number of the first thumbnail image (that is, the thumbnail image
that is described by the first entry in the thumbnails section).
The location of the first thumbnail image.
The number of pages that have thumbnail images.
The number of bits needed to represent the greatest number of consecutive
pages that do not have a thumbnail image.
The least length of a thumbnail image in bytes.
The number of bits needed to represent the difference between the greatest
and least length of a thumbnail image.