You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
337 lines
10 KiB
337 lines
10 KiB
% Copyright (C) 2001-2023 Artifex Software, Inc.
|
|
% 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.
|
|
%
|
|
% Refer to licensing information at http://www.artifex.com or contact
|
|
% Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
|
|
% CA 94129, USA, for further information.
|
|
%
|
|
|
|
% viewpbm.ps
|
|
% Display a PBM/PGM/PPM file.
|
|
% Requires the Level 2 `image' operator (to handle variable pixel widths).
|
|
% If SCALE is defined, maps input pixels to output pixels with that scale;
|
|
% if SCALE is undefined, scales the image to fit the page.
|
|
% If FITPAGE true, it fits the output page size to the image, honouring SCALE
|
|
% When the input is PAM (P7) RGBTAG from bitrgbtags device, -dTAG will show
|
|
% the tags is pseudo color:
|
|
% TEXT=1, IMAGE=2, PATH=4, UNTOUCHED=8
|
|
% red green blue gray
|
|
|
|
/s 100 string def
|
|
/readmaxv { % <file> readmaxv -
|
|
10 string readline pop cvx exec /maxv exch def
|
|
} bind def
|
|
/readrow { % <file> <row> readrow <row>
|
|
0 1 2 index length 1 sub {
|
|
1 index exch 3 index token pop put
|
|
} for exch pop
|
|
} bind def
|
|
/read01 { % <file> <count> read01 <byte>
|
|
0 exch {
|
|
1 index read pop 48 xor dup 1 le { exch dup add add } { pop } ifelse
|
|
} repeat
|
|
} bind def
|
|
/readrow01 { % <file> <row> readrow01 <row>
|
|
0 1 w 8 idiv {
|
|
1 index exch 3 index 8 read01 put
|
|
} for
|
|
wrem 0 ne {
|
|
dup rsize 1 sub wrem read01 8 wrem sub bitshift put
|
|
} if
|
|
exch pop
|
|
} bind def
|
|
/readwh { % <file> readwh <w> <h>
|
|
dup s readline pop % check for comment
|
|
(#) anchorsearch {
|
|
pop pop dup s readline pop
|
|
} if
|
|
cvx exec
|
|
} bind def
|
|
/pbmtypes mark
|
|
% The procedures in this dictionary are called as
|
|
% <file> Pn <w> <h> <readproc>
|
|
/P1 { % ASCII 1-bit white/black
|
|
/bpc 1 def /maxv 1 def /rsize w 7 add 8 idiv def
|
|
/wrem w 8 mod def
|
|
/ncomp 1 def /invert true def /DeviceGray setcolorspace
|
|
readwh
|
|
{ readrow01 }
|
|
} bind
|
|
/P2 { % ASCII 8-bit gray
|
|
readwh
|
|
/bpc 8 def 2 index readmaxv /rsize 2 index def
|
|
/ncomp 1 def /invert false def /DeviceGray setcolorspace
|
|
{ readrow }
|
|
} bind
|
|
/P3 { % ASCII 8-bit RGB
|
|
readwh
|
|
/bpc 8 def 2 index readmaxv /rsize 2 index 3 mul def
|
|
/ncomp 3 def /invert false def /DeviceRGB setcolorspace
|
|
{ readrow }
|
|
} bind
|
|
/P4 { % Binary 1-bit white/black
|
|
readwh
|
|
/bpc 1 def /maxv 1 def /rsize 2 index 7 add 8 idiv def
|
|
/ncomp 1 def /invert true def /DeviceGray setcolorspace
|
|
{ readstring pop }
|
|
} bind
|
|
/P5 { % Binary 8-bit gray
|
|
readwh
|
|
/bpc 8 def 2 index readmaxv /rsize 2 index def
|
|
/ncomp 1 def /invert false def /DeviceGray setcolorspace
|
|
{ readstring pop }
|
|
} bind
|
|
/P6 { % Binary 8-bit RGB
|
|
readwh
|
|
/bpc 8 def 2 index readmaxv /rsize 2 index 3 mul def
|
|
/ncomp 3 def /invert false def /DeviceRGB setcolorspace
|
|
{ readstring pop }
|
|
} bind
|
|
/P7 { % Assume Binary 8-bit CMYK -- assumes 'pf' is the input file
|
|
% P7
|
|
% WIDTH 612 %% used to set rsize and w
|
|
% HEIGHT 792 %% used to set h
|
|
% DEPTH 4 %% if present and not 1 or 4, then bail
|
|
% MAXVAL 255 %% used to set maxv
|
|
% TUPLTYPE CMYK | RGB_TAG | RGB_ALPHA | GRAYSCALE %% if present and not one of these, then bail
|
|
% ENDHDR %% skip everything else up to this
|
|
/P7KEYS <<
|
|
/WIDTH { /w pf token pop def }
|
|
/HEIGHT { /h pf token pop def }
|
|
/DEPTH { /d pf token pop def d 4 eq d 1 eq or not {
|
|
(*** Only DEPTH 1 or 4 PAM files supported at this time. ***) = quit
|
|
} if
|
|
}
|
|
/MAXVAL { /maxv pf token pop def }
|
|
/TUPLTYPE { pf token pop dup /CMYK eq 1 index /RGB_TAG eq or 1 index /RGB_ALPHA eq or 1 index /GRAYSCALE eq or not {
|
|
(*** Only CMYK, RGB_TAG, RGB_ALPHA and GRAYSCALE files supported at this time. ***) = quit
|
|
} if
|
|
/T exch def
|
|
}
|
|
/ENDHDR { exit }
|
|
(#) cvn { pf 255 string readline pop pop }
|
|
>> def
|
|
{ pf token not { exit } if P7KEYS exch .knownget { exec } if } loop
|
|
/bpc 8 def
|
|
/rsize w 4 mul def % same bytes per line for CMYK or RGB_TAG
|
|
/T load /CMYK eq {
|
|
/ncomp 4 def /invert false def /DeviceCMYK setcolorspace
|
|
w h { readstring pop }
|
|
} if
|
|
/T load /RGB_ALPHA eq {
|
|
/ncomp 4 def /invert false def /DeviceCMYK setcolorspace
|
|
w h { readstring pop }
|
|
} if
|
|
/T load /GRAYSCALE eq {
|
|
/ncomp 1 def /invert false def /DeviceGray setcolorspace
|
|
w h { readstring pop }
|
|
} if
|
|
/T load /RGB_TAG eq {
|
|
% not CMYK, must be RGB_TAG since was checked above
|
|
/TAG where {
|
|
pop
|
|
% show the tags as pseudo-color image
|
|
/ncomp 1 def /invert false def /maxv 1 def
|
|
[ /Indexed /DeviceRGB 255
|
|
% UNTOUCHED=0, TEXT=1, IMAGE=2, PATH=4
|
|
% gray red green blue
|
|
768 string
|
|
dup 0 <cccccc ff0000 00ff00 ffff00 0000ff ff00ff 00ffff ffffff 000000> putinterval
|
|
] setcolorspace
|
|
w h {
|
|
readstring pop
|
|
% discard all but the tag
|
|
dup length 4 div cvi
|
|
string % destination string
|
|
0 1 2 index length 1 sub {
|
|
2 index 1 index 4 mul get
|
|
2 index exch 2 index exch
|
|
put
|
|
pop % done with pixel#
|
|
} for
|
|
exch pop
|
|
}
|
|
} {
|
|
% show the image as RGB (ignore tags)
|
|
/ncomp 3 def /invert false def /DeviceRGB setcolorspace
|
|
w h {
|
|
readstring pop
|
|
% re-pack the RGB, discard the tag
|
|
dup length 4 div 3 mul cvi string % destination string
|
|
0 1 2 index length 3 idiv 1 sub {
|
|
% stack: RGBTstring destRGBstring pixel#
|
|
2 index 1 index 4 mul 4 getinterval
|
|
1 3 getinterval % RGB values
|
|
% stack RGBTstring destRGBstring pixel# RGBstring
|
|
2 index exch 2 index 3 mul exch
|
|
putinterval
|
|
pop % done with pixel#
|
|
} for
|
|
exch pop
|
|
}
|
|
} ifelse
|
|
} if
|
|
} bind
|
|
|
|
.dicttomark readonly def
|
|
/pbmsetup { % <file> <w> <h> <readproc> pbmsetup <imagedict>
|
|
/readproc exch def
|
|
/h exch def
|
|
/w exch def
|
|
/f exch def
|
|
20 dict begin % image dictionary
|
|
/ImageType 1 def
|
|
/Width w def
|
|
/Height h def
|
|
/ImageMatrix [w 0 0 h neg 0 h] def
|
|
/BitsPerComponent bpc def
|
|
/Decode [ 0 255 maxv div invert { exch } if ncomp 1 sub { 2 copy } repeat ] def
|
|
/DataSource [ f rsize string /readproc load /exec load ] cvx def
|
|
currentdict end
|
|
} def
|
|
/imagescale { % <imagedict> imagescale -
|
|
begin
|
|
/SCALE where {
|
|
pop
|
|
/FITPAGE where {/FITPAGE get}{false} ifelse
|
|
{
|
|
Width SCALE mul Height SCALE mul
|
|
}
|
|
{
|
|
% Map pixels SCALE-for-1. Assume orthogonal transformation.
|
|
Width 1 0 dtransform add abs div SCALE mul
|
|
Height 0 1 dtransform add abs div SCALE mul
|
|
} ifelse
|
|
} {
|
|
/FITPAGE where {/FITPAGE get}{false} ifelse
|
|
{
|
|
% Scale the image (uniformly) to fit the page.
|
|
clippath pathbbox pop pop translate % offset to the printable origin
|
|
pathbbox 3 -1 roll sub exch 3 -1 roll sub exch
|
|
% stack printable_width printable_height
|
|
2 copy gt 3 1 roll .min exch
|
|
% stack: min(printable_w, printable_h) landscape?
|
|
{
|
|
% printable height is less than width (landscape)
|
|
dup Height Width gt {
|
|
Width mul Height div exch
|
|
} {
|
|
Height mul Width div
|
|
} ifelse
|
|
} {
|
|
% printable width is less than height (portrait)
|
|
dup Height Width lt {
|
|
Width mul Height div exch
|
|
} {
|
|
Height mul Width div
|
|
} ifelse
|
|
} ifelse
|
|
}
|
|
{
|
|
0 0 translate
|
|
612 792
|
|
}
|
|
ifelse
|
|
}
|
|
ifelse
|
|
scale
|
|
end
|
|
} def
|
|
|
|
% Image a PBM file page by page.
|
|
/viewpbm { % <filename> viewpbm -
|
|
20 dict begin
|
|
(r) file /pf exch def {
|
|
pf token not { exit } if
|
|
pbmtypes exch get pf exch exec pbmsetup
|
|
currentcolorspace % preserve colorspace around setpagedevice
|
|
/FITPAGE where
|
|
{
|
|
/FITPAGE get
|
|
{
|
|
/SCALE where
|
|
{
|
|
pop
|
|
<< /PageSize [ 1 1 dtransform h SCALE mul exch abs div exch w SCALE mul exch abs div exch ] >>
|
|
}
|
|
{
|
|
<< /PageSize [ 1 1 dtransform h exch abs div exch w exch abs div exch ] >>
|
|
} ifelse
|
|
setpagedevice
|
|
} if
|
|
} if
|
|
setcolorspace % restore colorspave in case we did setpagedevice
|
|
dup imagescale image showpage
|
|
} loop
|
|
end
|
|
} def
|
|
|
|
% Reassemble a composite PBM file from the CMYK separations.
|
|
/viewpsm {
|
|
20 dict begin
|
|
/fname exch def
|
|
/sources [ 0 1 3 {
|
|
/plane exch def
|
|
/pf fname (r) file def
|
|
pf pbmtypes pf token pop get exec
|
|
% Stack: pf w h readproc
|
|
plane {
|
|
/readproc exch def /h exch def /w exch def pop
|
|
/row rsize string def
|
|
h { pf row readproc pop } repeat
|
|
pf pbmtypes pf token pop get exec
|
|
} repeat
|
|
pbmsetup
|
|
} for ] def
|
|
/datas [ sources { /DataSource get 0 get } forall ] def
|
|
/decode sources 0 get /Decode get
|
|
dup 0 get exch 1 get add cvi 0 exch
|
|
2 copy 4 copy 8 array astore def
|
|
sources 0 get
|
|
dup /MultipleDataSources true put
|
|
dup /DataSource datas put
|
|
dup /Decode decode put
|
|
/DeviceCMYK setcolorspace
|
|
/FITPAGE where
|
|
{
|
|
/FITPAGE get
|
|
{
|
|
/SCALE where
|
|
{
|
|
<</PageSize [w SCALE mul h SCALE mul]>>
|
|
}
|
|
{
|
|
<</PageSize [w h]>>
|
|
}ifelse
|
|
setpagedevice
|
|
} if
|
|
} if
|
|
dup imagescale image showpage
|
|
end
|
|
} def
|
|
|
|
% If the program was invoked from the command line, run it now.
|
|
[ .shellarguments
|
|
{ counttomark 1 ge
|
|
{ ] { viewpbm } forall
|
|
}
|
|
{ cleartomark
|
|
(Usage: gs [-dSCALE=#.#] [-dFITPAGE] [--] viewpbm.ps filename.p*m ...\n) print
|
|
( e.g.: gs [-dSCALE=#.#] [-dFITPAGE] [--] viewpbm.ps my.ppm another.ppm\n) print flush
|
|
( also -dTAG option can be used to show the pseudo-color tag image from a\n) print flush
|
|
( P7 RGB_TAG PAM file created by the bitrgbtags device.\n) print flush
|
|
(From version 9.50 you must supply permissions for this program to read the input file(s)\n) print flush
|
|
(either by using -dNOSAFER or by supplying --permit-file-read=<filename>\n) = flush
|
|
}
|
|
ifelse
|
|
}
|
|
{ pop
|
|
}
|
|
ifelse
|