ref: 81c9ede53f6f9ebd67e7134e664c98e08b9fcca6
dir: /sys/src/cmd/gs/lib/dumphint.ps/
% Copyright (C) 2000, 2001 Aladdin Enterprises. All rights reserved.
%
% This software is provided AS-IS with no warranty, either express or
% implied.
%
% This software is distributed under license and may not be copied,
% modified or distributed except as expressly authorized under the terms
% of the license contained in the file LICENSE in this distribution.
%
% For more information about licensing, please refer to
% http://www.ghostscript.com/licensing/. For information on
% commercial licensing, go to http://www.artifex.com/licensing/ or
% contact Artifex Software, Inc., 101 Lucas Valley Road #110,
% San Rafael, CA 94903, U.S.A., +1(415)492-9861.
% $Id: dumphint.ps,v 1.2 2004/04/08 16:18:25 giles Exp $
% Linearized PDF hint formatting utility.
%
% Linearized PDF hints generated by Acrobat suite seem to deviate from
% the published specification.
%
% /P (page offset hint table) key in hint stream is not generated by
% Adobe products. The key is no longer required in PDF 1.5.
%
% Per-page items 4 and 5 of the page offset hint table start from 1st
% page rather than 2nd page as the spec claims.
%
% All array entries start from the new byte boundary.
%
/table_width 79 def
/col1_width 66 def
% Skip bits to the next byte boundary
/bytealign { % <stream> bytealign -
begin /N 0 def /B 0 def end
} bind def
% Set bit stream position and align it to byte boundary
/set_align { % <<>> pos set_align -
exch begin
S exch setfileposition
/N 0 def /B 0 def
end
} bind def
% Read requested number of bits from the bit stream.
/bitread { % <bstream> <width> bitwrite <value>
exch begin
0 % bit val
{
1 index N .min % bit val m
dup 3 1 roll % bit m val m
bitshift % bit m val<<m
B 2 index N sub % bit m val<<m B m-N
bitshift add % bit m val<<m+B>>(N-m)
3 -1 roll % m val' bit
2 index sub % m val' bit'
3 -1 roll % val' bit' m
N exch sub dup % val' bit' N' N'
1 exch bitshift % val' bit' N' 1<<N'
1 sub B and % val' bit' N' B&(1<<N')
/B exch def % val' bit' N'
/N exch def % val' bit'
dup 0 le {
pop exit % val'
} if
/N N 8 add def
/B B 8 bitshift S read not { 0 ( *** EOF! *** ) = } if add def
exch
} loop % bit' val'
end
} bind def
% Print a string several times
/multiprint { % cnt (s) multiprint -
exch { dup print } repeat pop
} bind def
% Split the line into 2 substrings.
/split_line { % (s) split_line () ()
dup length col1_width gt {
col1_width 1 sub
dup -1 0 {
dup % (s) w i i
3 index % (s) w i i ()
exch get % (s) w i c
32 eq {
exch pop exit
} if
pop
} for
1 add % (s) w'
1 index exch % (s) (s) w'
0 exch % (s) (s) 0 w'
getinterval % (s) (v)
} {
dup % (s) (s)
} ifelse
(\n) search {
4 1 roll % (pre) (s) (post) (match)
pop pop % (pre) (s)
1 index length % (pre) (s) len
1 add % (pre) (s) len+1
} {
exch % (pre) (s)
1 index length % (pre) (s) len
} ifelse
1 index length % (pre) (s) len Len
1 index sub % (pre) (s) len Len-len
getinterval % (pre) (post)
} bind def
% Print a 2 column table. The string is printed in 1st column
% left-aligned. The number is printed in 2nd column right-aligned.
/two_column { % n () two_column -
split_line % n (a) ()
3 1 roll % () n (a)
dup length % () n (a) len
exch print % () n len
exch =string cvs % () len (n)
dup length % () len (n) len2
3 -1 roll add % () (n) len+len2
//table_width % () (n) len+len2 78
exch sub % () (n) 78-len+len2
( ) multiprint % () (n)
= % ()
{ dup length 0 eq { exit } if
split_line exch =
} loop
pop
() =
} bind def
% Print the header of a hint table
/table_header { % () table_header -
dup length dup
table_width exch sub 2 idiv % () len sp
dup ( ) multiprint % () len sp
3 -1 roll = % len sp
( ) multiprint % len
(=) multiprint
()= ()=
} bind def
% Pretty-print an array on top level
/dump_array { % [ ] dump_array -
([) = ( ) print
1 exch {
=string cvs % pos ()
dup length dup % pos () len len
3 index add 1 add % pos () len len+pos+1
table_width gt {
() =
( ) print % pos () len
2 add % pos () pos'
3 1 roll print pop % pos'
} {
( ) print % pos () len
exch print % pos len
add 1 add % pos'
} ifelse
} forall
pop
() = (]) =
} bind def
% Pretty-print an array on 2nd level
/dump_array2 { % [ ] dump_array2 -
( [) print
3 exch {
=string cvs % pos ()
dup length dup % pos () len len
3 index add 1 add % pos () len len+pos+1
table_width 2 sub gt {
() =
( ) print % pos () len
4 add % pos () pos'
3 1 roll print pop % pos'
} {
( ) print % pos () len
exch print % pos len
add 1 add % pos'
} ifelse
} forall
pop
( ]) =
} bind def
% Print an array header
/array_header {
() = =
} bind def
% Analyze the page offset hint table.
/dump_page_offset_table { % - dump_page_offset_table -
hint_stream
dup 32 bitread
dup /hint_minnop exch def
(1. The least number of objects in a page.) two_column
dup 32 bitread
dup /hint_1st_obj exch def
(2. Location of the first page's page object.) two_column
dup 16 bitread
dup /hint_maxnopbits exch def
(3. Bits for difference between max and min number of page objects.) two_column
dup 32 bitread
dup /hint_minpl exch def
(4. Least length of a page.) two_column
dup 16 bitread
dup /hint_maxplbits exch def
(5. Bits for difference between max and min length of a page.) two_column
dup 32 bitread
dup /hint_minsco exch def
(6. Least start of Contents offset. )
1 index 0 ne { (\n*** Acrobat expects 0 ***) concatstrings } if
two_column
dup 16 bitread
dup /hint_maxscobits exch def
(7. Bits for difference between max and min offset to the start of the content stream.) two_column
dup 32 bitread
dup /hint_mincl exch def
(8. Least contents length.) two_column
dup 16 bitread
dup /hint_maxclbits exch def
(9. Bits needed to represent the greatest Contents length.) two_column
dup 16 bitread
dup /hint_maxsorbits exch def
(10. Bits needed to represent the greatest number of Shared Object references.) two_column
dup 16 bitread
dup /hint_sobits exch def
(11. Bits needed to identify a Shared Object.) two_column
dup 16 bitread
dup /hint_numfbits exch def
(12. Bits needed to represent numerator of fraction.) two_column
dup 16 bitread
dup /hint_denf exch def
(13. Denominator of fraction.) two_column
pop
LinearizationParams /N get
% 1. Number of objects in the page.
hint_stream bytealign
/hint_page_obj [
2 index {
hint_stream hint_maxnopbits bitread
hint_minnop add
} repeat
] readonly def
(1. Number of objects on the page) array_header
hint_page_obj dump_array
% 2, Page length in bytes.
hint_stream bytealign
/hint_page_len [
2 index {
hint_stream hint_maxplbits bitread
hint_minpl add
} repeat
] readonly def
(2. Page length in bytes.) array_header
hint_page_len dump_array
% 3, Number of shared objects referenced from the page
hint_stream bytealign
/hint_page_sobj [
2 index {
hint_stream hint_maxsorbits bitread
} repeat
] readonly def
(3. Number of shared objects referenced from the page.) array_header
hint_page_sobj dump_array
% 4. Index into the shared objects hint table
hint_stream bytealign
/hint_page_sobj_id [
0 1 4 index 1 sub {
hint_page_sobj exch get [
exch {
hint_stream hint_sobits bitread
} repeat
] readonly
} for
] readonly def
(4. Index into the shared objects hint table.) array_header
([) =
hint_page_sobj_id { dump_array2 } forall
(])=
% 5. Fractional position for each shared object reference
hint_stream bytealign
/hint_page_sobj_pos [
0 1 4 index 1 sub {
hint_page_sobj exch get [
exch {
hint_stream hint_numfbits bitread
hint_denf div
} repeat
] readonly
} for
] readonly def
(5. Fractional position for each shared object reference. ) array_header
([)=
hint_page_sobj_pos { dump_array2 } forall
(])=
% 6. Offset of the page's content stream from the beginning of the page.
hint_stream bytealign
/hint_page_content_offset [
2 index {
hint_stream hint_maxscobits bitread
hint_minsco add
} repeat
] readonly def
(6. Offset of the page's content stream from the beginning of the page.) array_header
hint_page_content_offset dump_array
% 7. Length of the page's content stream in bytes.
hint_stream bytealign
/hint_page_content_len [
2 index {
hint_stream hint_maxclbits bitread
hint_mincl add
} repeat
] readonly def
(7. Length of the page's content stream in bytes.) array_header
hint_page_content_len dump_array
pop
} bind def
% Analyze tha shared object hint table
/dump_shared_object_table {
hint_stream
dup 32 bitread
dup /shint_1st_obj_id exch def
(1. Object number of the first object in the shared objects section) two_column
dup 32 bitread
dup /shint_1st_obj_pos exch def
(2. Location of the first object in the shared objects section.) two_column
dup 32 bitread
dup /shint_1st_shared exch def
(3. The number of shared object entries for the first page.) two_column
dup 32 bitread
dup /shint_all_shared exch def
(4. Number of shared object entries for the shared objects section including 1st page.) two_column
dup 16 bitread
dup /shint_group_bits exch def
(5. Number of bits needed to represent the greatest number of objects in a shared object group.) two_column
dup 32 bitread
dup /shint_group_least_sz exch def
(6. Least length of a shared object group in bytes.) two_column
dup 16 bitread
dup /shint_group_diff_bits exch def
(7. Bits for the difference between the greatest and least length of a shared object group size.) two_column
pop
(1. length of the object group in bytes.) array_header
hint_stream bytealign
/shint_group_sz [
shint_all_shared {
hint_stream shint_group_diff_bits bitread
shint_group_least_sz add
} repeat
] readonly def
shint_group_sz dump_array
(2. MD5 signature flag) array_header
hint_stream bytealign
/shint_md5_flags
[ shint_all_shared
{ hint_stream 1 bitread
} repeat
] readonly def
shint_md5_flags dump_array
(3. MD5 signature string) array_header
false shint_md5_flags { 0 ne or } forall {
shint_md5_flags {
0 eq {
(<>)=
} {
hint_stream /S get 128 string
readstring pop
dup length 128 eq {
==
} { pop (Error reading nd5 string.) ==
} ifelse
} ifelse
} forall
} {
() = (none) =
} ifelse
(4. The number of objects in the group.) array_header
hint_stream bytealign
/shint_group_cnt [
shint_all_shared {
hint_stream shint_group_bits bitread
} repeat
] readonly def
shint_group_cnt dump_array
} bind def
% Analyze the thumbnail hint table.
/dump_thumbnail_table {
hint_stream
dup 32 bitread
dup /thint_1st_obj_id exch def
(1. Object number of the first thumbnail image.) two_column
dup 32 bitread
dup /thint_1st_obj_pos exch def
(2. Location of the first thumbnail image.) two_column
dup 32 bitread
dup /thint_page_cnt exch def
(3. Number of pages that have thumbnail images.) two_column
dup 16 bitread
dup /thint_no_thumbnail_bits exch def
(4. Bits for the max number of consecutive pages without a thumbnail image.) two_column
dup 32 bitread
dup /thint_min_sz exch def
(5. The least length of a thumbnail image in bytes.) two_column
dup 15 bitread
dup /thint_obj_sz_bits exch def
(6. Bits for the difference between max and min length of a thumbnail image.) two_column
dup 32 bitread
dup /thint_min_obj_cnt exch def
(7. The least number of objects in a thumbnail image.) two_column
dup 16 bitread
dup /thint_obj_cnt_bits exch def
(8. Bits for the difference between max and min number of objects in a thumbnail image.) two_column
dup 32 bitread
dup /thint_1st_shared_obj exch def
(9. First object in the thumbnail shared objects section.) two_column
dup 32 bitread
dup /thint_1st_shared_pos exch def
(10. Location of the first object in the thumbnail shared objects section.) two_column
dup 32 bitread
dup /thint_shared_cnt exch def
(11. Number of thumbnail shared objects.) two_column
dup 32 bitread
dup /thint_shared_section_sz exch def
(12. Length of the thumbnail shared objects section in bytes.) two_column
pop
LinearizationParams /N get
(1. The number of preceding pages lacking a thumbnail image.) array_header
hint_stream bytealign
/thint_no_thumbnail_pages [
2 index {
hint_stream thint_no_thumbnail_bits bitread
} repeat
] readonly def
thint_no_thumbnail_pages dump_array
(2. Number of objects in this page's thumbnail image.) array_header
hint_stream bytealign
/thint_page_obj_cnt [
2 index {
hint_stream thint_obj_cnt_bits bitread
thint_min_obj_cnt add
} repeat
] readonly def
thint_page_obj_cnt dump_array
(3. Length of this page's thumbnail image in bytes.) array_header
hint_stream bytealign
/thint_page_obj_sz [
2 index {
hint_stream thint_obj_sz_bits bitread
thint_min_sz add
} repeat
] readonly def
thint_page_obj_sz dump_array
pop
} bind def
% Analyze the generic hint table.
% The hint field names are re-used.
/dump_generic_table {
hint_stream
dup 32 bitread
dup /ghint_1st_obj exch def
(1. Object number of the first object in the group.) two_column
dup 32 bitread
dup /ghint_1st_obj_pos exch def
(2. Location of the first object in the group.) two_column
dup 32 bitread
dup /ghint_obj_cnt exch def
(3. Number of objects in the group.) two_column
dup 32 bitread
dup /ghint_group_sz exch def
(4. Length of the object group in bytes.) two_column
pop
} bind def
% Analyze the interactive hint table.
% The hint field names are re-used.
/dump_interactive_table {
hint_stream
dup 32 bitread
dup /ihint_1st_obj exch def
(1. Object number of the first object in the group.) two_column
dup 32 bitread
dup /ihint_1st_obj_pos exch def
(2. Location of the first object in the group.) two_column
dup 32 bitread
dup /ihint_obj_cnt exch def
(3. Number of objects in the group.) two_column
dup 32 bitread
dup /ihint_group_sz exch def
(4. Length of the object group in bytes.) two_column
dup 32 bitread
dup /ihint_shared_cnt exch def
(5. Number of shared object references.) two_column
dup 16 bitread
dup /ihint_shared_obj_bits exch def
(6. Bits for the max shared object id used by the interactive form or the logical structure hierarchy.)
1 index hint_sobits ne {
(\n*** This fiels is not equal to max shared object ID bits ***) concatstrings
} if
pop
(7. Shared object identifier.) array_header
hint_stream bytealign
/ihint_shared_obj_id [
ihint_shared_cnt {
hint_stream hint_sobits bitread
} repeat
] readonly def
ihint_shared_obj_id dump_array
} bind def
% Enumerate all documented hint tables.
/dump_all_tables { % <<stream>> dump_all_tables -
(Page offset hint table) table_header
hint_stream 0 set_align
dump_page_offset_table
(S, Shared object hint table) table_header
dup /S .knownget {
hint_stream exch set_align
dump_shared_object_table
} {
(Required table is not found.) error_msg
} ifelse
dup /T .knownget {
(T, Thumbnail hint table) table_header
hint_stream exch set_align
dump_thumbnail_table
} if
dup /O .knownget {
(O, Outline hint table) table_header
hint_stream exch set_align
dump_generic_table
} if
dup /A .knownget {
(A, Thread information hint table) table_header
hint_stream exch set_align
dump_generic_table
} if
dup /E .knownget {
(E, Named destination hint table) table_header
hint_stream exch set_align
dump_generic_table
} if
dup /V .knownget {
(V, Interactive form hint table) table_header
hint_stream exch set_align
dump_interactive_table
} if
dup /I .knownget {
(I, Information dictionary hint table) table_header
hint_stream exch set_align
dump_generic_table
} if
dup /C .knownget {
(C, Logical structure hint table) table_header
hint_stream exch set_align
dump_interactive_table
} if
dup /L .knownget {
(L, Page label hint table) table_header
hint_stream exch set_align
dump_generic_table
} if
pop
} bind def
% Load PDF file and extract the hint stream.
/pdf_dump_hints { % <infile> pdf_dump_hints -
dup (r) file % fname
false exch % fname F file
{
dup 7 string readstring pop % fname F file ()
(%PDF-1.) ne { pop exit } if % fname F file
dup 0 setfileposition
dup token not { pop exit } if % fname F file obj
dup type /integertype ne { pop exit } if % fname F file obj
1 index token not { pop pop exit } if % fname F file obj gen
dup type /integertype ne {pop pop exit}if % fname F file obj gen
4 2 roll % fname obj gen F file
dup 0 setfileposition
exch true or % fname obj gen file T
exit
} loop
{
pdfdict begin
pdfopenfile dup begin
40 dict begin
/IDict exch def
.setsafe
% Read all objects into memory.
Trailer touch
resolveR % fname <<>>
dup /Linearized known {
dup /L get % fname <<>> Len
3 -1 roll status not { 0 0 0 0 } if % <<>> Len
pop pop exch pop % <<>> Len len
eq {
/LinearizationParams exch def
LinearizationParams /H get
dup length 2 eq {
0 get PDFoffset add PDFfile exch setfileposition
PDFfile token pop
PDFfile token pop
resolveR dup true resolvestream
/ReusableStreamDecode filter
bitstream dup bytealign
/hint_stream exch def
dump_all_tables
} {
pop
(Overflow hint stream is not supported.) =
} ifelse
} {
pop
(Wrong file length in linearization dictionary.) =
} ifelse
} {
pop (The file is not linearized.) =
} ifelse
end % temporary dict
end % IDict
end
} {
pop
(Input file is not a valid PDF file.) =
} ifelse
} bind def
% Initial setup
/dump_hints {
counttomark 1 eq {
exch pop
save exch
3000000 setvmthreshold
pdfoptdict begin
pdf_dump_hints
end
restore
true
} {
cleartomark false
} ifelse
} bind def
/shellarguments {false} def
(pdfopt.ps) runlibfile
currentdict /shellarguments undef
% Check for command line arguments.
mark shellarguments {
dump_hints not {
(Usage: gs -dNODISPLAY -- dumphint.ps input.pdf) = flush
} if
} {
pop
} ifelse
% EOF