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Text File | 2000-11-21 | 8.3 KB | 259 lines | [TEXT/R*ch] |
- % Copyright (C) 1990, 1995, 1997, 1998, 1999 Aladdin Enterprises. All rights reserved.
- %
- % This file is part of Aladdin Ghostscript.
- %
- % Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author
- % or distributor accepts any responsibility for the consequences of using it,
- % or for whether it serves any particular purpose or works at all, unless he
- % or she says so in writing. Refer to the Aladdin Ghostscript Free Public
- % License (the "License") for full details.
- %
- % Every copy of Aladdin Ghostscript must include a copy of the License,
- % normally in a plain ASCII text file named PUBLIC. The License grants you
- % the right to copy, modify and redistribute Aladdin Ghostscript, but only
- % under certain conditions described in the License. Among other things, the
- % License requires that the copyright notice and this notice be preserved on
- % all copies.
-
- % $Id: ps2epsi.ps,v 1.1 2000/03/09 08:40:40 lpd Exp $
- % 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 gs-bugs@aladdin.com.
- %
- % 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
- { % 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 memory device
- devmatrix devwidth devheight <ff 00>
- makeimagedevice
- /arraydevice exch def
- arraydevice setdevice % (does an erasepage)
- /rowwidth devwidth 7 add 8 idiv 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
- } def
-
- /epsifontdict 100 dict def
-
- /epsisetfont
- {
- % code here keeps a list of font names in dictionary epsifontdict
- /tmpfont exch def
- /tmpfontname tmpfont /FontName get def
- epsifontdict tmpfontname known not { epsifontdict tmpfontname 0 put } if
- epsifontdict tmpfontname
- epsifontdict tmpfontname get 1 add put
- 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 /lmb 0 def
- /rm 0 def /rmb 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 dup 0 ne { exch exit }{ pop 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 /lmb exch def }
- % If the index is equal, we or the bits together
- { lm eq { lmb or /lmb exch def }{ pop } ifelse
- } ifelse
- % Now find the rightmost index
- loopcount -1 0
- { dup row exch get dup 0 ne { exch exit }{ pop pop } ifelse
- } for
- dup rm gt
- % If the new index is greater, we save index and element
- { /rm exch def /rmb exch def }
- % If the index is equal, or the bits
- { rm eq { rmb or /rmb exch def } { pop } ifelse
- } ifelse
- } if
- pop
- } for
-
- % Now we find the real left & right bit positions
- 256 0 1 7
- { exch 2 div dup lmb le { pop exit }{ exch pop } ifelse
- } for
- /lmb exch def
-
- 1 7 -1 0
- { exch dup dup rmb and eq { pop exit }{ 2 mul exch pop } ifelse
- } for
- /rmb exch def
-
- % Calculate the bounding box values.
- % Note that these must be corrected to produce closed-open intervals.
- /llx lm 8 mul lmb add def
- /lly devheight bm sub 1 sub def
- /urx rm 8 mul rmb add 1 add def
- /ury devheight tm sub def
-
- % 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 (%%BoundingBox: ) writestring
- epsifile llx write==only epsifile ( ) writestring
- epsifile lly write==only epsifile ( ) writestring
- epsifile urx write==only epsifile ( ) writestring
- epsifile ury write==
- epsifile (%%BeginPreview: ) writestring
- epsifile urx llx sub write==only epsifile ( ) writestring
- epsifile bm tm sub 1 add write==only epsifile ( 1 ) writestring
- epsifile bm tm sub 1 add write==
- epsifile flushfile
-
- % Define character and bit widths for the output line buffer:
- /cwidth rm lm sub 1 add def
- /bwidth cwidth 8 mul def
- /owidth urx llx sub 7 add 8 idiv def
- /out cwidth string def
-
- % Create a 1-bit-high device for bitblt to align with the bbox
- gsave
- matrix cwidth 8 mul 1 <00 ff> makeimagedevice setdevice
-
- % 'image' a zero string to clear the line device
- bwidth 1 1 matrix cwidth string image
-
- tm 1 bm
- { % Get a scan line interval from the array device
- arraydevice exch row copyscanlines lm cwidth getinterval
- lmb 0 gt
- { % 'image' it into the line device with the lmb offset
- bwidth 1 1 [1 0 0 1 lmb 0] 5 -1 roll image
- % Now we get the modified scan line
- currentdevice 0 out copyscanlines 0 owidth getinterval
- } if
- % Write out the hex data
- epsifile (% ) writestring
- epsifile exch writehexstring
- epsifile (\n) writestring
- } 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
-