250 lines
8.1 KiB
PostScript
250 lines
8.1 KiB
PostScript
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% Copyright (C) 1990, 2000 Aladdin Enterprises. All rights reserved.
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%
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% This software is provided AS-IS with no warranty, either express or
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% implied.
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%
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% This software is distributed under license and may not be copied,
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% modified or distributed except as expressly authorized under the terms
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% of the license contained in the file LICENSE in this distribution.
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%
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% For more information about licensing, please refer to
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% http://www.ghostscript.com/licensing/. For information on
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% commercial licensing, go to http://www.artifex.com/licensing/ or
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% contact Artifex Software, Inc., 101 Lucas Valley Road #110,
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% San Rafael, CA 94903, U.S.A., +1(415)492-9861.
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% $Id: ps2epsi.ps,v 1.10 2003/05/07 16:37:17 ray Exp $
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% Convert an arbitrary PostScript file to an EPSI file.
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%
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% Please do not contact these users if you have questions. They no longer
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% have the time, interest, or current expertise to keep this code working.
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% If you find bugs, please send proposed fixes to bug-gs@ghostscript.com.
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%
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% Bug fix 2002-04-20 by rayjj: Bounding box was incorrect since it depended
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% on the dither pattern and gray shade at the boundary. Changed to use
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% 8-bit grayscale preview image to allow correct bounding box (at the
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% expense of a 8x larger preview image). Also moved .setsafe until after
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% the device and file operations are complete (but still before the input
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% file is processed.
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% Bug fix 2000-04-11 by lpd: if a font didn't have a FontName (which is the
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% case for bitmap fonts produced by recent versions of dvips), setfont
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% caused an error.
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% Bug fix 8/21/99 by lpd: many of the margin and width computations were
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% wrong (off by 1). The code only "worked" because the bugs were
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% (mostly) in conservative directions.
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% Modified 3/17/98 by lpd to make it possible to run this file without
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% running the ps2epsi script first, for debugging.
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% Bug fix 9/29/97 by lpd <ghost@aladdin.com>: if the page size wasn't an
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% exact multiple of 8 bits, an incorrect bounding box (or a rangecheck
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% error) could occur.
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% Patched 7/26/95 by
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% Greg P. Kochanski <gpk@bell-labs.com>
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% to add many new DSC comments and make the comments conforming.
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% Original version contributed by
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% George Cameron <george@bio-medical-physics.aberdeen.ac.uk>
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%
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% Initialize, and redefine copypage and showpage.
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% ps2edict is normally defined in the pre-loaded code created by the
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% ps2epsi script.
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/ps2edict where { pop } { /ps2edict 25 dict def } ifelse
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ps2edict begin
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% The main procedure
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/ps2epsi
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{ % Open the file
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outfile (w) file /epsifile exch def
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% Get the device parameters
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currentdevice getdeviceprops .dicttomark
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/HWSize get aload pop
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/devheight exch def
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/devwidth exch def
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matrix defaultmatrix
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/devmatrix exch def
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% Make a corresponding 8-bit deep memory device
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devmatrix devwidth devheight
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256 string 0 1 255 { 1 index exch dup 255 exch sub put } for
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makeimagedevice
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/arraydevice exch def
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arraydevice
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% Turn on anti-aliasing
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mark /TextAlphaBits 4 /GraphicsAlphaBits 4 6 -1 roll
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putdeviceprops
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setdevice % (does an erasepage)
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/rowwidth devwidth def
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/row rowwidth string def
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/zerorow rowwidth string def % all zero
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% Replace the definition of showpage
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userdict /showpage { ps2edict begin epsipage end } bind put
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userdict /setfont { ps2edict begin epsisetfont end } bind put
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//systemdict /.setsafe known { .setsafe } if
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} bind def
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/epsifontdict 100 dict def
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/epsisetfont
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{
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% code here keeps a list of font names in dictionary epsifontdict
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/tmpfont exch def
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tmpfont /FontName known {
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/tmpfontname tmpfont /FontName get def
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epsifontdict tmpfontname known not { epsifontdict tmpfontname 0 put } if
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epsifontdict tmpfontname 2 copy get 1 add put
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} if
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tmpfont setfont
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} bind def
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% Get a scan line from the memory device, zeroing any bits beyond
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% the device width.
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/getscanline { % <device> <y> <string> getscanline <string>
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dup 4 1 roll copyscanlines pop
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16#ff00 devwidth 7 and neg bitshift 255 and
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dup 0 ne {
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1 index dup length 1 sub 2 copy get 4 -1 roll and put
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} {
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pop
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} ifelse
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} bind def
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/margintest { % <y-start> <step> <y-limit> margintest <y-non-blank>
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% <y-start> <step> <y-limit> margintest -
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{ dup arraydevice exch row getscanline
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zerorow ne { exit } if pop
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} for
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} bind def
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/epsiNameStr 200 string def
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/epsiNpages 0 def
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/epsiNpageStr 20 string def
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/epsipage
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{
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/epsiNpages epsiNpages 1 add def
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/loopcount devheight 1 sub def
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% Find top margin -- minimum Y of non-blank scan line.
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-1 0 1 loopcount margintest
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dup -1 eq { (blank page!!\n) print quit }{ exch pop } ifelse
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/tm exch def
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% Find bottom margin -- maximum Y of non-blank scan line.
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loopcount -1 0 margintest
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/bm exch def
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% Initialise limit variables
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/loopcount rowwidth 1 sub def
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/lm loopcount def
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/rm 0 def
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% Find left and right boundaries of image
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tm 1 bm
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{ % Get more data
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arraydevice exch row getscanline pop
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% Scan from left to find first non-zero element
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% We save first the element, then the index
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-1 0 1 loopcount
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{ dup row exch get 0 ne { exch pop exit }{ pop } ifelse
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} for
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% If we found -1, row is blank ..
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dup -1 ne
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{ % Find the leftmost index
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dup lm lt
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% If the new index is less, we save index and element
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{ /lm exch def } { pop } ifelse
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% Now find the rightmost index
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loopcount -1 0
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{ dup row exch get 0 ne { exit }{ pop } ifelse
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} for
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dup rm gt
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% If the new index is greater, we save index and element
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{ /rm exch def } { pop } ifelse
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} if
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} for
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% Calculate the bounding box values.
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% Note that these must be corrected to produce closed-open intervals.
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/llx lm def
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/lly devheight bm sub 1 sub def
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/urx rm 1 add def
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/ury devheight tm sub def
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% Write out the magic string and bounding box information
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epsifile (%!PS-Adobe-2.0 EPSF-1.2\n) writestring
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/epsititle where { pop epsifile epsititle writestring } if
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/epsicreator where { pop epsifile epsicreator writestring } if
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/epsicrdt where { pop epsifile epsicrdt writestring } if
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/epsifor where { pop epsifile epsifor writestring } if
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epsifile flushfile
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% Write out the page count:
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epsifile (%%Pages: ) writestring
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epsifile epsiNpages epsiNpageStr cvs writestring
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epsifile (\n) writestring
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epsifile flushfile
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% Write out the list of used fonts:
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epsifile (%%DocumentFonts:) writestring
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epsifontdict {
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epsifile ( ) writestring
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pop epsiNameStr cvs epsifile exch writestring
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} forall
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epsifile (\n) writestring
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epsifile flushfile
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epsifile (%%BoundingBox: ) writestring
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epsifile llx write==only epsifile ( ) writestring
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epsifile lly write==only epsifile ( ) writestring
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epsifile urx write==only epsifile ( ) writestring
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epsifile ury write==
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% Define character and bit widths for the output line buffer:
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/cwidth rm lm sub 1 add def
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/out cwidth string def
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epsifile (%%EndComments\n\n) writestring
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epsifile (%%BeginProlog\n) writestring
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epsifile (%%BeginPreview: ) writestring
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epsifile cwidth write==only epsifile ( ) writestring
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epsifile bm tm sub 1 add write==only epsifile ( 8 ) writestring
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epsifile bm tm sub 1 add
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cwidth 39 add 40 idiv mul write==
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epsifile flushfile
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gsave
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tm 1 bm
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{ % Get a scan line interval from the array device
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arraydevice exch row copyscanlines lm cwidth getinterval
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% Write out the hex data as 40 bytes per line (82 chars)
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0 40 cwidth
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{ epsifile (% ) writestring
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epsifile exch 2 index exch
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dup cwidth exch sub 40 .min getinterval writehexstring
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epsifile (\n) writestring
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} for
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pop
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} for
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epsifile (%%EndImage\n) writestring
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epsifile (%%EndPreview\n) writestring
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epsifile flushfile
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grestore
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erasepage initgraphics
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DonePage 0 1 put
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} bind def
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(outfile) getenv
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{ /outfile exch def
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ps2epsi
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/DonePage 1 string def
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(%stdin) (r) file cvx execute0
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DonePage 0 get 0 eq { showpage } if
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} if
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end
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quit
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