%! PS-Adobe-2.0
%% Program for reading a .ps file and writing out a PPM file.
%% For Ghostscript versions 2.5.2 and later.
%%
%% Modified by Tom Shield 3/18/94:
%%   added variable page size.
%% Modified by L. Peter Deutsch 2/19/94:
%%   added proper handling of local and global VM.
%% Modified by L. Peter Deutsch 9/10/92:
%%   internal procedures didn't use `bind';
%%   grestoreall undid selection of PPM device.
%% Modified by L. Peter Deutsch 4/6/92:
%%   Ghostscript 2.4 requires all 8 primary colors to be in the palette.
%% Modified by L. Peter Deutsch 1/17/92:
%%   the palette for makeimagedevice is now a string, not an array.
%% Modified by L. Peter Deutsch 9/24/91:
%%   allow starting page number to be specified.
%% Modified by L. Peter Deutsch 7/7/91 to keep track of page count
%%   in a way that gets around save and restore.
%% Modified by L. Peter Deutsch 11/07/90
%%   to use filename.ppm for the first page, renamed to filename.1ppm
%%   with subsequent pages .2ppm, etc. if more than one page.
%% Modified by Henry Minsky 11/03/90
%%   for each showpage, it writes out a ppm file with name filename.ppm.N
%%   where N increments each showpage, starting at 1
%% Modified by L. Peter Deutsch -- Aladdin Enterprises -- 08/25/90 --
%%   converted from a one-shot program to a utility package,
%%   designed to be used from an interactive terminal.
%% Modified by L. Peter Deutsch -- Aladdin Enterprises -- 08/02/90
%% Modified on 08/02/90 for using the CORRECT color map.
%% Modified 06/26/90 for a color file
%% Original version by Phillip Conrad - Perfect Byte, Inc.
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%% Define the directory for holding the PPM information

/ppmdict 30 dict def
ppmdict begin

  /Horz_dpi 72 def		% defaults to screen density
  /Vert_dpi 72 def

  /Horz_size 8.5 def		% defaults to page size
  /Vert_size 11 def

  /OutFilePrefix () def		% default to null (current directory)

  /FirstPageNumber 1 def	% any non-negative integer is OK

  /Palette1 <ff 00> def
  /Palette8
%========== Here we define all 256 color entries. ======
%========== Colors were taken from the X Windows default colors, ======
%========== hacked up a little so we get all 8 primaries. ======
<
000000 ffffff a8a8a8 ebebeb 5c5c5c 373737 5f929e 85ccdd
345057 1f3034 729efe a0ddff 3f578c 263454 6186d8 2f2f64
ffff00 b0e2ff ff0000 808080 efdf84 55fe55 fe0000 66fe57
fe987a feca71 fefefe fe8d7c fea977 fec472 feb875 fe937b
fe957a feb575 98fe5d fe8b7d fea677 feb276 feaf76 febe74
fe837e fefc6a fe0c9a fe0350 fe08b5 6715fe fefb3f fe544b
00c000 20c000 40c000 60c000 80c000 a0c000 c0c000 e0c000
00ff00 20e000 40e000 60e000 80e000 a0e000 c0e000 e0e000
000040 200040 400040 600040 800040 a00040 c00040 e00040
002040 202040 402040 602040 802040 a02040 c02040 e02040
004040 204040 404040 604040 804040 a04040 c04040 e04040
006040 206040 406040 606040 806040 a06040 c06040 e06040
008040 208040 408040 608040 808040 a08040 c08040 e08040
00a040 20a040 40a040 60a040 80a040 a0a040 c0a040 e0a040
00c040 20c040 40c040 60c040 80c040 a0c040 c0c040 e0c040
00e040 20e040 40e040 60e040 80e040 a0e040 c0e040 e0e040
000080 200080 400080 600080 800080 a00080 c00080 e00080
002080 202080 402080 602080 802080 a02080 c02080 e02080
004080 204080 404080 604080 804080 a04080 c04080 e04080
006080 206080 406080 606080 806080 a06080 c06080 e06080
008080 208080 408080 608080 808080 a08080 c08080 e08080
00a080 20a080 40a080 60a080 80a080 a0a080 c0a080 e0a080
00c080 20c080 40c080 60c080 80c080 a0c080 c0c080 e0c080
00e080 20e080 40e080 60e080 80e080 a0e080 c0e080 e0e080
0000ff 2000c0 4000c0 6000c0 8000c0 a000c0 c000c0 ff00ff
0020c0 2020c0 4020c0 6020c0 8020c0 a020c0 c020c0 e020c0
0040c0 2040c0 4040c0 6040c0 8040c0 a040c0 c040c0 e040c0
0060c0 2060c0 4060c0 6060c0 8060c0 a060c0 c060c0 e060c0
0080c0 2080c0 4080c0 6080c0 8080c0 a080c0 c080c0 e080c0
00a0c0 20a0c0 40a0c0 60a0c0 80a0c0 a0a0c0 c0a0c0 e0a0c0
00c0c0 20c0c0 40c0c0 60c0c0 80c0c0 a0c0c0 c0c0c0 e0c0c0
00ffff 20e0c0 40e0c0 60e0c0 80e0c0 a0e0c0 c0e0c0 e0e0c0
> def

  % Define a procedure for computing the output file name for a given page.
  /pagefilename		% <int|null> pagefilename -> <string
   { OutFilePrefix FileName concatstrings (.) concatstrings
     exch dup null ne
      { 1 sub FirstPageNumber add (xxxxxx) cvs concatstrings }
      { pop }
     ifelse (ppm) concatstrings
   } bind def

  % Redefine copypage and showpage appropriately.

  /currentglobal where { pop currentglobal true .setglobal } { true } ifelse

  /copypage
   { ppmdict begin

       /PageCount PageCountString cvi 100000 sub def
       /PageCount PageCount 1 add def

       PageCount 1 eq
	{ null pagefilename			% first page
	}
	{ PageCount 2 eq
	   {					% second page, rename first
	     null pagefilename 1 pagefilename
	     (Renaming ) print 1 index print ( to ) print
	       dup print (\n) print
	     flush
	     renamefile
	   } if
	  PageCount pagefilename
	} ifelse
       /FileNameOut exch def

       FileNameOut (w) file
         /FileDescOut exch def

       (Writing ) print FileNameOut print (\n) print
       flush
       FileDescOut Device writeppmfile
       FileDescOut closefile

       WrotePage 0 1 put	% /WrotePage true def
       PageCount 100000 add PageCountString cvs pop

     end
   } bind userdict begin odef end
  /showpage
   { copypage erasepage initgraphics
   } bind userdict begin odef end

  % Redefine grestoreall so it doesn't undo the device selection
  /grestoreall /grestoreall load def
  /grestoreall
   { ppmdict begin   grestoreall   Device setdevice   end
   } bind userdict begin odef end

  not { false .setglobal } if

  /Convert			% the main procedure
  				% <filename> <palette> Convert -
   { /Palette exch def
     /FileName exch def

     % Save and restore don't save and restore the contents of strings.
     % Therefore, we use strings to hold the two variables whose values
     % must persist across page boundaries (PageCount and WrotePage).

     /PageCountString 6 string def
     100000 PageCountString cvs pop
     /WrotePage 1 string def

     /ScaleX Horz_dpi 72 div def
     /ScaleY Vert_dpi 72 div def

     /Width Horz_size Horz_dpi mul round cvi def
     /Height Vert_size Vert_dpi mul round cvi def

     FileName (.ps) concatstrings
       /FileNameIn exch def		% file name with extension

     [ScaleX 0.0 0.0 ScaleY neg 0.0 Height]
     Width Height Palette makeimagedevice
       /Device exch def
     Device setdevice

     % For running the file, remove ppmdict from the dict stack
     FileNameIn end run		% ppmdict
     ppmdict begin
     WrotePage 0 get 0 eq { showpage } if % make sure the page got written
     end			% ppmdict

   } bind def

end				% ppmdict

%%%%%% Define the user-callable procedures

/ppmsetdensity
 { ppmdict begin
   /Vert_dpi exch def
   /Horz_dpi exch def
   end
 } bind def

/ppmsetpagesize
 { ppmdict begin
   /Vert_size exch def
   /Horz_size exch def
   end
 } bind def

/ppmsetprefix
 { ppmdict begin
   /OutFilePrefix exch def
   end
 } bind def

/ppmsetfirstpagenumber
 { cvi
   ppmdict begin
   /FirstPageNumber exch def
 } bind def

/ppm1run
 { ppmdict begin   Palette1 Convert
 } bind def

/ppm8run
 { ppmdict begin   Palette8 Convert
 } bind def

/ppm24run
 { ppmdict begin   null Convert
 } bind def

%%%%%% Display instructions for the user.

(Usage: (file) ppmNrun\n) print
(   converts file.ps to file.ppm (single page),\n) print
(     or file.1ppm, file.2ppm, ... (multi page).\n) print
(   N is # of bits per pixel (1, 8, or 24).\n) print
(Examples: (golfer) ppm1run   ..or..   (escher) ppm8run\n) print
(Optional commands you can give first:\n) print
(   horiz_DPI vert_DPI ppmsetdensity\n) print
(   horiz_inches vert_inches ppmsetpagesize\n) print
(   (dirname/) ppmsetprefix\n) print
(   page_num ppmsetfirstpagenumber\n) print
flush