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/*
* AUTHOR(s)
* Mark Senn wrote the early versions of this program for the
* BBN BitGraph. Stephan Bechtolsheim, Bob Brown, Richard
* Furuta, James Schaad and Robert Wells improved it. Norm
* Hutchinson ported the program to the Sun. Neal Holtz ported
* it to the Apollo, and from there to producing PostScript
* output. Scott Jones added intelligent font substitution.
* Jean-Francois Lamy fixed the PostScript interface for illustrations.
* Takafumi Sakurai added LW built-in font support, 256 size
* pxl file support, and pk file support.
* Wasisaka added gf file support.
*
*/
/* Basic method:
* Using the local font cacheing machinery that was in the previewer,
* we can easily manage to send the bitmap for each chracter only once.
* Two passes are made over each page in the DVI file. The first pass
* simply outputs the bitmaps for all characters on that page that haven't
* been sent before. The second pass outputs all the character setting
* and positioning commands. This allows us to bracket the setting portion
* with PostScript save's and restore's, thus reclaiming considerable
* virtual memory after each page.
*
* All coordinates are output in the PostScript system (TeX origin),
* and in integer units of rasters (300/inch) -- except for character
* widths, which are sent as floating point numbers.
*
* About 2 pages of PostScript support code must be sent to the LaserWriter
* before this stuff goes. It is automatically included unless the
* -h option is given.
*/
/* Change log:
*
* Early 1985, (nmh) -- ported sun version to Apollo.
* A little later (nmh) -- changed to continue on in the event of missing
* font files.
* 30-Mar-85 (nmh) -- added -a option to specify a different PXL area
* 30-Mar-85 (nmh) -- changed default PXL area to /pxl118
* 31-Mar-85 (nmh) -- fixed bug in OpenFontFile() regarding more than MAXOPEN
* PXL files -- changed to mark files as closed in font_entry.
* 7-Apr-85 (nmh) -- made command line argument decoding case insensitive.
* cleaned up handling of DVI file name argument.
* 30-May-85 (nmh) -- new version; hacked to output PostScript commands
* 6-Jun-85 (nmh) -- added relative positioning (20% smaller PostScript output)
* add -m option to specify mag
* 11-Jun-85 (nmh) -- fixed bug regarding char spacings in very long "words"
* 12-Jun-85 (nmh) -- v1.02 - process DVI pages in reverse order
* 13-Jun-85 (nmh) -- fixed bug re PXL files getting opened too often when no PreLoad
* 14-Jun-85 (nmh) -- font dict created in PostScript only when 1st char of font downloaded
* add -m0 -mh -m1 etc. to specify magsteps
* 16-Aug-85 (nmh) -- added -c option t0 create output file in spool area (Apollo specific)
* added -h option to copy header file to output
* added -o option to pass options through to PostScript
* 20-Aug-85 (nmh) -- v1.03
* 24-Aug-85 (nmh) -- add -q option (for quiet operation).
* changed -o option to check PostScript option
* changed to output coordinates in TeX system (but
* scaled to raster units) -- (0,0) at 1" in and down from
* top left (better for use with different size paper).
* -- v2.00
* 25-Aug-85 (nmh) -- added dictionary enclosure to Tex.ps, and output
* suitable prolog here.
* 26-Aug-85 (nmh) -- changes to tex.ps to support Macintosh documents.
* 14-Sep-85 (nmh) -- added keyword=value decoding to \special;
* 15-Sep-85 (nmh) -- added -i file option.
* 23-Sep-85 (saj) -- added font substitution for case when font is
* unavailable at requested mag. (a frequent occurrence
* with some macro packages like LaTeX)
* 24-Jun-86 (jfl) -- Support Mac illustrations produced by LaserWriter
* driver 3.0 Changed tex.ps
* Added rotation for \special inclusions
* Embedded ^D are ignored in included PostScript files
* 14-Mar-87 (ts) -- added LW buil-in font support and 256 size pxl file
* support.
* no font substitution for now.
* 12-Jan-88 (ts) -- added pk font support.
*/
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