diff options
author | Karl Berry <karl@freefriends.org> | 2005-12-28 00:07:27 +0000 |
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committer | Karl Berry <karl@freefriends.org> | 2005-12-28 00:07:27 +0000 |
commit | 30dd9f517c9c093ff3319061647a4555264f7914 (patch) | |
tree | 0d7a349bf99be5a42cc9c5a80a30f3b7136c4ccd /Master/xemtex/gslib/viewpbm.ps | |
parent | 08ab8dce83f53b0f915cb66a37bbc8478b22c307 (diff) |
trunk
git-svn-id: svn://tug.org/texlive/trunk@9 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/xemtex/gslib/viewpbm.ps')
-rw-r--r-- | Master/xemtex/gslib/viewpbm.ps | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/Master/xemtex/gslib/viewpbm.ps b/Master/xemtex/gslib/viewpbm.ps new file mode 100644 index 00000000000..2ba6907e48f --- /dev/null +++ b/Master/xemtex/gslib/viewpbm.ps @@ -0,0 +1,185 @@ +% Copyright (C) 1992, 1995, 1996, 1998, 1999 Aladdin Enterprises. All rights reserved. +% +% This program is free software; you can redistribute it and/or modify it +% under the terms of the GNU General Public License as published by the +% Free Software Foundation; either version 2 of the License, or (at your +% option) any later version. +% +% This program is distributed in the hope that it will be useful, but +% WITHOUT ANY WARRANTY; without even the implied warranty of +% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General +% Public License for more details. +% +% You should have received a copy of the GNU General Public License along +% with this program; if not, write to the Free Software Foundation, Inc., +% 59 Temple Place, Suite 330, Boston, MA, 02111-1307. + +% $Id: viewpbm.ps,v 1.2.6.2.2.1 2003/04/12 14:02:39 giles Exp $ +% 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. + +/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 +.dicttomark readonly def +/pbmsetup { % <file> <w> <h> <readproc> runpbm - + /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 + % 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 + } { + % Scale the image (uniformly) to fit the page. + clippath pathbbox pop pop translate + pathbbox .min exch pop exch pop ceiling + dup Height Width gt { + Width mul Height div exch + } { + Height mul Width div + } 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 + 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 + 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 [--] viewpbm.ps filename.p*m ...\n) print + ( e.g.: gs [--] viewpbm.ps my.ppm another.ppm\n) print flush + } + ifelse + } + { pop + } +ifelse |