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Edit File : ps2epsi.ps \| Size : 8.34 KB
% Copyright (C) 2001-2019 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., 1305 Grant Avenue - Suite 200, Novato, % CA 94945, U.S.A., +1(415)492-9861, for further information. % % Convert an arbitrary PostScript file to an EPSI file. % % Please do not contact these users if you have questions. They no longer % have the time, interest, or current expertise to keep this code working. % If you find bugs, please send proposed fixes to bug-gs@ghostscript.com. % % Bug fix 2002-04-20 by rayjj: Bounding box was incorrect since it depended % on the dither pattern and gray shade at the boundary. Changed to use % 8-bit grayscale preview image to allow correct bounding box (at the % expense of a 8x larger preview image). Also moved .setsafe until after % the device and file operations are complete (but still before the input % file is processed. % Bug fix 2000-04-11 by lpd: if a font didn't have a FontName (which is the % case for bitmap fonts produced by recent versions of dvips), setfont % caused an error. % Bug fix 8/21/99 by lpd: many of the margin and width computations were % wrong (off by 1). The code only "worked" because the bugs were % (mostly) in conservative directions. % Modified 3/17/98 by lpd to make it possible to run this file without % running the ps2epsi script first, for debugging. % Bug fix 9/29/97 by lpd <ghost@aladdin.com>: if the page size wasn't an % exact multiple of 8 bits, an incorrect bounding box (or a rangecheck % error) could occur. % Patched 7/26/95 by % Greg P. Kochanski <gpk@bell-labs.com> % to add many new DSC comments and make the comments conforming. % Original version contributed by % George Cameron <george@bio-medical-physics.aberdeen.ac.uk> % % Initialize, and redefine copypage and showpage. % ps2edict is normally defined in the pre-loaded code created by the % ps2epsi script. /ps2edict where { pop } { /ps2edict 25 dict def } ifelse ps2edict begin % The main procedure /ps2epsi { % bbox written to outfile by bbox device from ps2epsi command file outfile (r) file /epsifile exch def /BBoxString epsifile 256 string readline pop def /HiresBBoxString epsifile 256 string readline pop def epsifile closefile % Open the file outfile (w) file /epsifile exch def % Get the device parameters currentdevice getdeviceprops .dicttomark /HWSize get aload pop /devheight exch def /devwidth exch def matrix defaultmatrix /devmatrix exch def % Make a corresponding 8-bit deep memory device devmatrix devwidth devheight 256 string 0 1 255 { 1 index exch dup 255 exch sub put } for makeimagedevice /arraydevice exch def arraydevice % Turn on anti-aliasing mark /TextAlphaBits 4 /GraphicsAlphaBits 4 6 -1 roll putdeviceprops setdevice % (does an erasepage) /rowwidth devwidth def /row rowwidth string def /zerorow rowwidth string def % all zero % Replace the definition of showpage userdict /showpage { ps2edict begin epsipage end } bind put userdict /setfont { ps2edict begin epsisetfont end } bind put userdict /setpagedevice /pop load put } bind def /epsifontdict 100 dict def /epsisetfont { % code here keeps a list of font names in dictionary epsifontdict /tmpfont exch def tmpfont /FontName known { /tmpfontname tmpfont /FontName get def epsifontdict tmpfontname known not { epsifontdict tmpfontname 0 put } if epsifontdict tmpfontname 2 copy get 1 add put } if tmpfont setfont } bind def % Get a scan line from the memory device, zeroing any bits beyond % the device width. /getscanline { % <device> <y> <string> getscanline <string> dup 4 1 roll copyscanlines pop 16#ff00 devwidth 7 and neg bitshift 255 and dup 0 ne { 1 index dup length 1 sub 2 copy get 4 -1 roll and put } { pop } ifelse } bind def /margintest { % <y-start> <step> <y-limit> margintest <y-non-blank> % <y-start> <step> <y-limit> margintest - { dup arraydevice exch row getscanline zerorow ne { exit } if pop } for } bind def /epsiNameStr 200 string def /epsiNpages 0 def /epsiNpageStr 20 string def /epsipage { /epsiNpages epsiNpages 1 add def /loopcount devheight 1 sub def % Find top margin -- minimum Y of non-blank scan line. -1 0 1 loopcount margintest dup -1 eq { (blank page!!\n) print quit }{ exch pop } ifelse /tm exch def % Find bottom margin -- maximum Y of non-blank scan line. loopcount -1 0 margintest /bm exch def % Initialise limit variables /loopcount rowwidth 1 sub def /lm loopcount def /rm 0 def % Find left and right boundaries of image tm 1 bm { % Get more data arraydevice exch row getscanline pop % Scan from left to find first non-zero element % We save first the element, then the index -1 0 1 loopcount { dup row exch get 0 ne { exch pop exit }{ pop } ifelse } for % If we found -1, row is blank .. dup -1 ne { % Find the leftmost index dup lm lt % If the new index is less, we save index and element { /lm exch def } { pop } ifelse % Now find the rightmost index loopcount -1 0 { dup row exch get 0 ne { exit }{ pop } ifelse } for dup rm gt % If the new index is greater, we save index and element { /rm exch def } { pop } ifelse } { pop } ifelse } for % Write out the magic string and bounding box information epsifile (%!PS-Adobe-2.0 EPSF-1.2\n) writestring /epsititle where { pop epsifile epsititle writestring } if /epsicreator where { pop epsifile epsicreator writestring } if /epsicrdt where { pop epsifile epsicrdt writestring } if /epsifor where { pop epsifile epsifor writestring } if epsifile flushfile % Write out the page count: epsifile (%%Pages: ) writestring epsifile epsiNpages epsiNpageStr cvs writestring epsifile (\n) writestring epsifile flushfile % Write out the list of used fonts: epsifile (%%DocumentFonts:) writestring epsifontdict { epsifile ( ) writestring pop epsiNameStr cvs epsifile exch writestring } forall epsifile (\n) writestring epsifile flushfile epsifile BBoxString writestring epsifile (\n) writestring epsifile HiresBBoxString writestring epsifile (\n) writestring % Define character and bit widths for the output line buffer: /cwidth rm lm sub 1 add def /out cwidth string def epsifile (%%EndComments\n\n) writestring epsifile (%%BeginProlog\n) writestring epsifile (%%BeginPreview: ) writestring epsifile cwidth write==only epsifile ( ) writestring epsifile bm tm sub 1 add write==only epsifile ( 8 ) writestring epsifile bm tm sub 1 add cwidth 39 add 40 idiv mul write== epsifile flushfile gsave tm 1 bm { % Get a scan line interval from the array device arraydevice exch row copyscanlines lm cwidth getinterval % Write out the hex data as 40 bytes per line (82 chars) 0 40 cwidth { epsifile (% ) writestring epsifile exch 2 index exch dup cwidth exch sub 40 .min getinterval writehexstring epsifile (\n) writestring } for pop } for epsifile (%%EndImage\n) writestring epsifile (%%EndPreview\n) writestring epsifile flushfile grestore erasepage initgraphics DonePage 0 1 put } bind def (outfile) getenv { /outfile exch def ps2epsi /DonePage 1 string def (%stdin) (r) file cvx execute0 DonePage 0 get 0 eq { showpage } if } if end quit Back

Edit File : ps2epsi.ps | Size : 8.34 KB

% Copyright (C) 2001-2019 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.,  1305 Grant Avenue - Suite 200, Novato,
% CA 94945, U.S.A., +1(415)492-9861, for further information.
%

% Convert an arbitrary PostScript file to an EPSI file.
%
% Please do not contact these users if you have questions.  They no longer
% have the time, interest, or current expertise to keep this code working.
% If you find bugs, please send proposed fixes to bug-gs@ghostscript.com.
%
% Bug fix 2002-04-20 by rayjj: Bounding box was incorrect since it depended
%   on the dither pattern and gray shade at the boundary. Changed to use
%   8-bit grayscale preview image to allow correct bounding box (at the
%   expense of a 8x larger preview image). Also moved .setsafe until after
%   the device and file operations are complete (but still before the input
%   file is processed.
% Bug fix 2000-04-11 by lpd: if a font didn't have a FontName (which is the
%   case for bitmap fonts produced by recent versions of dvips), setfont
%   caused an error.
% Bug fix 8/21/99 by lpd: many of the margin and width computations were
%   wrong (off by 1).  The code only "worked" because the bugs were
%   (mostly) in conservative directions.
% Modified 3/17/98 by lpd to make it possible to run this file without
%   running the ps2epsi script first, for debugging.
% Bug fix 9/29/97 by lpd <ghost@aladdin.com>: if the page size wasn't an
%   exact multiple of 8 bits, an incorrect bounding box (or a rangecheck
%   error) could occur.
% Patched 7/26/95 by
%	Greg P. Kochanski <gpk@bell-labs.com>
%   to add many new DSC comments and make the comments conforming.
% Original version contributed by
%	George Cameron <george@bio-medical-physics.aberdeen.ac.uk>
%

% Initialize, and redefine copypage and showpage.

% ps2edict is normally defined in the pre-loaded code created by the
% ps2epsi script.
/ps2edict where { pop } { /ps2edict 25 dict def } ifelse
ps2edict begin

% The main procedure
  /ps2epsi
   {
        % bbox written to outfile by bbox device from ps2epsi command file
        outfile (r) file /epsifile exch def
        /BBoxString epsifile 256 string readline pop def
        /HiresBBoxString epsifile 256 string readline pop def
        epsifile closefile
                        % Open the file
     outfile (w) file /epsifile exch def
                                        % Get the device parameters
     currentdevice getdeviceprops .dicttomark
     /HWSize get aload pop
       /devheight exch def
       /devwidth exch def
     matrix defaultmatrix
       /devmatrix exch def
                                % Make a corresponding 8-bit deep memory device
     devmatrix devwidth devheight
     256 string 0 1 255 { 1 index exch dup 255 exch sub put } for
     makeimagedevice
     /arraydevice exch def
     arraydevice
     % Turn on anti-aliasing
     mark /TextAlphaBits 4 /GraphicsAlphaBits 4 6 -1 roll
     putdeviceprops
     setdevice	% (does an erasepage)
     /rowwidth devwidth def
     /row rowwidth string def
     /zerorow rowwidth string def	% all zero
                                % Replace the definition of showpage
     userdict /showpage { ps2edict begin epsipage end } bind put
     userdict /setfont { ps2edict begin epsisetfont end } bind put
     userdict /setpagedevice /pop load put
   } bind def

/epsifontdict 100 dict def

/epsisetfont
 {
 % code here keeps a list of font names in dictionary epsifontdict
 /tmpfont exch def
 tmpfont /FontName known {
   /tmpfontname tmpfont /FontName get def
   epsifontdict tmpfontname known not { epsifontdict tmpfontname 0 put } if
   epsifontdict tmpfontname 2 copy get 1 add put
 } if
 tmpfont setfont
 } bind def

% Get a scan line from the memory device, zeroing any bits beyond
% the device width.
/getscanline {		% <device> <y> <string> getscanline <string>
  dup 4 1 roll copyscanlines pop
  16#ff00 devwidth 7 and neg bitshift 255 and
  dup 0 ne {
    1 index dup length 1 sub 2 copy get 4 -1 roll and put
  } {
    pop
  } ifelse
} bind def

/margintest {		% <y-start> <step> <y-limit> margintest <y-non-blank>
                        % <y-start> <step> <y-limit> margintest -
  { dup arraydevice exch row getscanline
    zerorow ne { exit } if pop
  } for
} bind def

/epsiNameStr 200 string def
  /epsiNpages 0 def
  /epsiNpageStr 20 string def
  /epsipage
   {
     /epsiNpages epsiNpages 1 add def
     /loopcount devheight 1 sub def

% Find top margin -- minimum Y of non-blank scan line.
     -1 0 1 loopcount margintest
     dup -1 eq { (blank page!!\n) print quit }{ exch pop } ifelse
     /tm exch def

% Find bottom margin -- maximum Y of non-blank scan line.
     loopcount -1 0 margintest
     /bm exch def

% Initialise limit variables
     /loopcount rowwidth 1 sub def
     /lm loopcount def
     /rm 0 def

% Find left and right boundaries of image
     tm 1 bm
      { % Get more data
        arraydevice exch row getscanline pop
        % Scan from left to find first non-zero element
        % We save first the element, then the index
        -1 0 1 loopcount
        { dup row exch get 0 ne { exch pop exit }{ pop } ifelse
        } for
        % If we found -1, row is blank ..
        dup -1 ne
        { % Find the leftmost index
          dup lm lt
          % If the new index is less, we save index and element
          { /lm exch def } { pop } ifelse
          % Now find the rightmost index
          loopcount -1 0
          { dup row exch get 0 ne { exit }{ pop } ifelse
          } for
          dup rm gt
          % If the new index is greater, we save index and element
          { /rm exch def } { pop } ifelse
        } {
          pop
        } ifelse
      } for

% Write out the magic string and bounding box information
     epsifile (%!PS-Adobe-2.0 EPSF-1.2\n) writestring
         /epsititle where { pop epsifile epsititle writestring } if
         /epsicreator where { pop epsifile epsicreator writestring } if
         /epsicrdt where { pop epsifile epsicrdt writestring } if
         /epsifor where { pop epsifile epsifor writestring } if
     epsifile flushfile

% Write out the page count:
         epsifile (%%Pages: ) writestring
         epsifile epsiNpages epsiNpageStr cvs writestring
         epsifile (\n) writestring
     epsifile flushfile

% Write out the list of used fonts:
         epsifile (%%DocumentFonts:) writestring
         epsifontdict {
                                        epsifile ( ) writestring
                                        pop epsiNameStr cvs epsifile exch writestring
                                        } forall
         epsifile (\n) writestring
     epsifile flushfile

epsifile BBoxString writestring epsifile (\n) writestring
        epsifile HiresBBoxString writestring epsifile (\n) writestring

% Define character and bit widths for the output line buffer:
     /cwidth rm lm sub 1 add def
     /out cwidth string def

epsifile (%%EndComments\n\n) writestring
     epsifile (%%BeginProlog\n) writestring
     epsifile (%%BeginPreview: ) writestring
     epsifile cwidth write==only epsifile ( ) writestring
     epsifile bm tm sub 1 add write==only epsifile ( 8 ) writestring
     epsifile bm tm sub 1 add
     cwidth 39 add 40 idiv mul write==
     epsifile flushfile

gsave

tm 1 bm
      { % Get a scan line interval from the array device
        arraydevice exch row copyscanlines lm cwidth getinterval
        % Write out the hex data as 40 bytes per line (82 chars)
        0 40 cwidth
         { epsifile (% ) writestring
           epsifile exch 2 index exch
           dup cwidth exch sub 40 .min getinterval writehexstring
           epsifile (\n) writestring
         } for
        pop
      } for

epsifile (%%EndImage\n) writestring
     epsifile (%%EndPreview\n) writestring
     epsifile flushfile
     grestore
     erasepage initgraphics

DonePage 0 1 put
   } bind def

(outfile) getenv
  { /outfile exch def
    ps2epsi

/DonePage 1 string def
    (%stdin) (r) file cvx execute0
    DonePage 0 get 0 eq { showpage } if
  } if

end
quit

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