path: root/dviware/beebe/src/dvidjp.c

/*
I just got myself a brand new HP Desk Jet Plus printer to use with TeX.
I and a number of other people asked the net for sources to one of the many
DeskJet drivers which must be out there, but there was no response.  I
searched all the archives I could find, with similarly unsuccessful
results.

So I took the dvijet driver from the Beebe release and modified it for
the desk jet plus.  It might be called (as by some) a "vanilla" driver
because it doesn't use downloadable fonts, but downloadable fonts
requires an extra memory cartridge -- for that I would have just
as soon bought the IIp.   I did include some memory compaction, though,
which reduces file size and transfer time by 50 - 70 %  So it's not
quite vanilla.  The various compaction schemes can be switched off
at compile time if the old Desk Jet doesn't support them (I have no
idea) or if any of them prove buggy (possible).

I include the modified source below, as I am guessing there are
others out there on the net who would find it useful.  Perhaps some
kind soul will even archive it.  It requires the rest of the
Beebe driver code, which is commonly available -- eg,
at ymir.claremont.edu & utah ... whatever.

Hope this is helpful.  Sorry if this isn't the place I'm supposed to post
source, but it's the best way I know to reach people who might find
this useful.

Paul Kirkaas
kirkaas@cs.ucla.edu

----------------------------------------------------------
/* -*-C-*- dvidjp.c */
/*-->dvidjp*/
/**********************************************************************/
/******************************* dvidjp *******************************/
/**********************************************************************/

/* Driver for HP DeskJet Plus printer -- modified from
 * Beebe Laser Jet driver
 * by Paul Kirkaas (kirkaas@cs.ucla.edu) 22 May 1990
 *	patch 1 -- bugs in YOFF & COMPACTION fixed 23 May 1990
 *
 * Employs 3 types of data compaction for greater efficiency --
 * up to 60 - 70% reduction in output file size.  Each compaction 
 * scheme can be switched on or off independently by defining any
 * or all of:
 *
 * XOFF -- X offset -- instead of a string of leading zeros, offset
 * 	by appropriate amount.  Minimal savings when used  with
 *	COMPACTION mode set.
 *
 * YOFF -- Y offset -- compress multiple blank lines into a single
 *	y skip command.
 *
 * COMPACTION -- Uses mode 2 compaction on Desk Jet Plus -- this is
 *	the trickiest but most effective compression modification.
 *	This is the likliest part to have a bug.
 *	Lots of cleaning up can be done here.
 *
 * If you have an old Desk Jet (not a Plus) it may not have
 * all these abilities -- try undfining some of these switches.
 *
 * It should run straight with the Beebe driver set; you might
 * have to make some adjustments.
 *
 * Please let me know if you make any improvements or repairs.
 * Thanks
 *
 * Good Luck.
 */

#include "dvihead.h"

/**********************************************************************/
/************************  Device Definitions  ************************/
/**********************************************************************/

/* All output-device-specific definitions go here.  This section must
be changed when modifying a dvi driver for use on a new device */

#undef HPLASERJET
#define  HPLASERJET       1		/* conditional compilation flag */
#define  HPDESKJET       1		/* conditional compilation flag */
		/* Include the following line for Y offsets*/
#define YOFF	1
		/* Include the following line for using temporary X offsets*/
#define XOFF	1
		/* Include the following line for Mode 2 Compaction */
#define	COMPACTION	1	
/*
#define COMPACTION	0
*/

#define VERSION_NO	"2.10"		/* DVI driver version number */

#define  DEVICE_ID	(comp ? \
		"Hewlett-Packard Desk Jet plus (from LaserJet)\n\
	WITH Data Compaction for faster I/O" : \
		"Hewlett-Packard Desk Jet plus (from LaserJet)\n\
	with-OUT Data Compaction I/O" )
				/* this string is printed at runtime */
#define OUTFILE_EXT	(comp ? "djc" : "dj")

#define  DEFAULT_RESOLUTION 300		/* default dots/inch on HP Desk Jet */

#define  BYTE_SIZE        8		/* output file byte size */

#undef STDRES
#define STDRES  1			/* 0 for low-resolution devices */

#define  XDPI		300		/* HP Laser Jet horizontal dots/inch */
#define  XPSIZE		8		/* horizontal paper size in inches */

#define  XSIZE		(((XDPI*XPSIZE+2*HOST_WORD_SIZE-1)/\
				(2*HOST_WORD_SIZE))*(2*HOST_WORD_SIZE))
					/* number of horizontal dots; */
					/* MUST BE multiple of */
					/* 2*HOST_WORD_SIZE */
#define  XWORDS		((XSIZE + HOST_WORD_SIZE - 1)/HOST_WORD_SIZE)
					/* number of words in rows  */
					/* of bitmap array */

#define  YDPI		300		/* HP Laser Jet vertical dots/inch */

#define  YPSIZE		11		/* vertical paper size in inches */
#define  YSIZE		(YDPI*YPSIZE)	/* number of vertical dots */

/* The printer bit map (must have an even number of columns). */

#define XBIT ((1+2*XWORDS)/2)
#define YBIT YSIZE
#if    (IBM_PC_LATTICE | IBM_PC_MICROSOFT | IBM_PC_WIZARD)
#undef SEGMEM
#define SEGMEM 1 /* ( ((long)XBIT * (long)YBIT) > 65536L ) */
#endif
int comp = COMPACTION;		/* compaction flag -- reset in option.h */

#include "bitmap.h"

#include "main.h"
#undef STDMAG
#undef RESOLUTION
#define STDMAG 1500
#define	RESOLUTION	(((float)STDMAG)/5.0)	/* dots per inch */
#include "abortrun.h"
#include "actfact.h"
#include "alldone.h"
#include "chargf.h"
#include "charpk.h"
#include "charpxl.h"
#include "clrbmap.h"
#include "clrrow.h"
#include "dbgopen.h"

/*-->devinit*/
/**********************************************************************/
/****************************** devinit *******************************/
/**********************************************************************/

void
devinit(argc,argv)		/* initialize device */
int argc;
char *argv[];
{
    (void)getbmap();
    OUTS("\033E");	/* printer reset */
    OUTS("\033&l0L");	/* Disable perforation skip */
/* OUTS("\033*rB");	/* End graphics */
    OUTS("\033*t300R");	/* printer resolution */
if (comp)
    OUTS("\033*b2M");	/* Select Compacted Graphics Mode Two */
else
    OUTS("\033*b0M");	/* Select Full Graphics Mode */

    OUTS("\033*r0A");	/* Start graphics, at leftmost position */
}

/*-->devterm*/
/**********************************************************************/
/****************************** devterm *******************************/
/**********************************************************************/

void
devterm()			/* terminate device */
{
    OUTS("\033E");	/* printer reset*/
}

#include "dvifile.h"
#include "dviinit.h"
#include "dviterm.h"
#include "dispchar.h"
#include "f20open.h"
#include "fatal.h"
#include "fillrect.h"
#include "findpost.h"
#include "fixpos.h"
#include "fontfile.h"
#include "fontsub.h"
#include "getbmap.h"
#include "getbytes.h"
#include "getfntdf.h"
#include "getpgtab.h"
#include "initglob.h"
#include "inch.h"
#include "loadchar.h"
#include "movedown.h"
#include "moveover.h"
#include "moveto.h"
#include "nosignex.h"
#include "openfont.h"
#include "option.h"

/*-->outline*/
/**********************************************************************/
/****************************** outline *******************************/
/**********************************************************************/

void
outline(pbit)
UNSIGN32 *pbit;				/* pointer to raster line */

/*************************************************************************
Use machine-specific coding here for efficiency.  For TOPS-20, we encode
9 bytes from every pair  of 36-bit words.

For each raster line on the paper, the Laser Jet expects a binary  8-bit
byte stream of the form

    <ESC>*bnnnWxxxxxxx ... xxxxxxx
               <--- nnn bytes --->

where each byte contains, in order from high to low bit, a left-to-right
bit pattern.  No  end-of-line marker  is required;  the escape  sequence
automatically causes a new raster line to be started.
*************************************************************************/

{
    register UNSIGN32 w_even,w_odd;
    register UNSIGN32 *p;
    register BYTE *pbuf;
    BYTE buf[1+(XSIZE+7)/8];		/* space for EOS + n 8-bit bytes */
    register INT16 i,last_word;
    int ic,jc;			/* just counters */
    unsigned char * endb;	/* pointer to end of buf */
    unsigned char greystr[129]; /* Max length of 127 in compacted mode 2 */
    unsigned char * greyp;	/* Pointer to greystr[]  */
    unsigned char outstr[999];	/* Compacted mode 2 output string */
    unsigned char * outp;	/* Pointer to outstr[]  */
    unsigned char * endob;	/* pointer to end of outstr */
    unsigned char cmp;		/* Comparison variable */
    int outsz;			/* Size of outstr -- since includes NULLs */
    int count;
    int gcnt;	/* Length of grey runs */


#if    IBM_PC_MICROSOFT
    for (last_word = XBIT - 1;
	(last_word >= 1) && (*(UNSIGN32*)normaddr(pbit,last_word) == 0);
	--last_word)
        ;				/* trim white space a word at a time */
#else
    p = pbit + XBIT - 1;		/* point to last word on line */
    for (last_word = XBIT - 1; (last_word >= 1) && (*p == 0); --last_word)
        --p;				/* trim white space a word at a time */
#endif

    p = pbit;
    pbuf = &buf[0];
    for (i = 0; i <= last_word; i += 2)	/* loop over trimmed raster */
    {
        w_even = (*p++);
        w_odd = (*p++);

#if    (HOST_WORD_SIZE == 36)
	*pbuf++ = (BYTE)( (w_even >> 28) & 0xff);
	*pbuf++ = (BYTE)( (w_even >> 20) & 0xff);
	*pbuf++ = (BYTE)( (w_even >> 12) & 0xff);
	*pbuf++ = (BYTE)( (w_even >>  4) & 0xff);
	*pbuf++ = (BYTE)( ((w_even <<  4) | (w_odd >> 32)) & 0xff);
	*pbuf++ = (BYTE)( (w_odd  >> 24) & 0xff);
	*pbuf++ = (BYTE)( (w_odd  >> 16) & 0xff);
	*pbuf++ = (BYTE)( (w_odd  >>  8) & 0xff);
	*pbuf++ = (BYTE)( (w_odd       ) & 0xff);
#else /* HOST_WORD_SIZE == 32 */
	/* encode 8 bytes at a time on 32-bit machines */
	*pbuf++ = (BYTE)( (w_even >> 24) & 0xff);
	*pbuf++ = (BYTE)( (w_even >> 16) & 0xff);
	*pbuf++ = (BYTE)( (w_even >>  8) & 0xff);
	*pbuf++ = (BYTE)( (w_even      ) & 0xff);
	*pbuf++ = (BYTE)( (w_odd  >> 24) & 0xff);
	*pbuf++ = (BYTE)( (w_odd  >> 16) & 0xff);
	*pbuf++ = (BYTE)( (w_odd  >>  8) & 0xff);
	*pbuf++ = (BYTE)( (w_odd       ) & 0xff);
#endif

    }

    *pbuf = '\0';			/* trailing EOS marker */

    last_word |= 1;			/* make last_word ODD */
    for (i = ((last_word+1)*HOST_WORD_SIZE)/8;
        (*(--pbuf) == '\0') && (i > 1); --i)
	;	/* trim trailing zero bytes, leaving at least one */
    last_word = i;
#ifdef XOFF
	/* Trim leading zero bytes & do appropriate Temporary X offset */
    OUTS("\033*b"); /* Set up for raster transfer */
    pbuf=buf;
    for (ic=0; !buf[ic] && ic<last_word ; ic++, pbuf++)
	;
    if (ic>10) /* Do an X-shift */
	{
	    OUTF("%dx",8*ic); /* Shift by 8*ic # of blank pixels */
	}
    else	/* don't bother */
	{ pbuf = buf; ic = 0; }

    endb = &buf[last_word];

if (comp)
  {
    greyp = greystr;
    outp = outstr;
    outsz = gcnt = 0;
    endb = &buf[last_word];
    while (pbuf <= endb)
    {
      cmp = *pbuf;
      for (count = 0; count<127 && pbuf<=endb && cmp==*pbuf; count ++, pbuf++)
	;
      if (count==0){printf("DANGER DANGER ***COUNT IS ZERO***!!!\n");exit(0);}
      if (count <= 3) /* No run yet -- just put them in greystr */
	{
	  gcnt += count;
	  for (jc = 0; jc < count ; jc ++)
	    {
		*greyp = cmp;
		greyp++;
	    }
	  if (gcnt >= 124)  /* Can't have more than 127, so ... */
	    {
		outstr[outsz] = gcnt-1;
		outsz++;
		for (jc = 0; jc < gcnt; jc ++)
		  {
		    outstr[outsz + jc] = greystr[jc];
		  }
		outsz += gcnt;
		gcnt = 0;
		greyp = greystr;
		continue;
	    }
	}
      else /* We have a run of 4 or more */
	{
	    if (gcnt) /* Flush our accumilated grey */
	    {
		outstr[outsz] = gcnt-1;
		outsz++;
		for (jc = 0; jc < gcnt; jc ++)
		  {
		    outstr[outsz + jc] = greystr[jc];
		  }
		outsz += gcnt;
		gcnt = 0;
		greyp = greystr;
	    }
	    outstr[outsz] = (unsigned char) (1-count); /* Is this cast right? */
	    outsz ++;
	    outstr[outsz] = cmp;
	    outsz++;
	}
    }
    if (gcnt) /* Flush our accumilated grey */
      {
	outstr[outsz] = gcnt-1;
	outsz++;
	for (jc = 0; jc < gcnt; jc ++)
	  {
	    outstr[outsz + jc] = greystr[jc];
	  }
	outsz += gcnt;
	gcnt = 0;
	greyp = greystr;
      }
    OUTF("%dW",outsz); /* How much is coming ... */
    endob = outstr + outsz -1; /* End of the outstr */ 
    for (outp = outstr; outp <= endob; outp++ )
        OUTC(*outp);

  }
 else 
  {
    OUTF("%dW",(int)last_word-ic); /* How much is coming ... */
    /* cannot use fprintf with %s format because of
    			   NUL's in string, and it is slow anyway */
    for (i = ic; i < last_word; ++pbuf,++i)
        OUTC(*pbuf);
  }
#else
    OUTF("\033*b%dW",(int)last_word);
    pbuf = &buf[0];	/* cannot use fprintf with %s format because of
    			   NUL's in string, and it is slow anyway */
    for (i = 0; i < last_word; ++pbuf,++i)
        OUTC(*pbuf);
#endif XOFF
}

/*-->prtbmap*/
/**********************************************************************/
/****************************** prtbmap *******************************/
/**********************************************************************/

void
prtbmap()

{
    register UNSIGN32 *p;
    register INT16 j,k,ybottom,ytop;
#ifdef YOFF
    int ycnt = 0;
#endif YOFF
/*   OUTS("\033E");	/* printer reset */
/*    OUTS("\033&l0L");	/* Disable perforation skip */
/*    OUTS("\033*rB");	/* End graphics */
/*    OUTS("\033*t300R");	/* printer resolution */
if (comp)
    OUTS("\033*b2M");	/* Select Compacted Graphics Mode Two */
else
    OUTS("\033*b0M");	/* Select Full Graphics Mode */

    OUTS("\033*r0A");	/* Start graphics, at leftmost position */

    if (DBGOPT(DBG_PAGE_DUMP))
    {
	INT16 k1,k2,k3;

	for (k3 = 0; k3 < XBIT; (k3 += 7, ++p))
	{	/*  print bitmap 7 words at a pass */
	    k1 = k3;
	    k2 = MIN(XBIT,k1+7);
	    (void)printf("prtbmap()...bitmap words %d..%d",k1,k2-1);
	    NEWLINE(stdout);
	    (void)printf("     ");
	    for (k = k1; k < k2; ++k)
	        (void)printf("%10d",k*HOST_WORD_SIZE);
	    NEWLINE(stdout);
	    for (j = YBIT-1; j >= 0; --j)
	    {
	        p = BITMAP(j,0);
		for (k = 0; k < XBIT; (++k,++p))
		{
	            if (*p)	/* print non-blank raster line */
		    {
		        p = BITMAP(j,k1);
			(void)printf("%5d:",j);
			for (k = k1; k < k2; (++k,++p))
			    (void)printf(" %09lx",*p);
			NEWLINE(stdout);
			break;	/* exit loop over k */
		    }
		}
	    }
	}
    }

    (void)clearerr(plotfp);

#if    ZAPTHISOUT
    k = -1;	    /* find top non-zero raster */
    for (j = YBIT-1; (j > 0) && (k < 0); --j)  /* loop over raster lines */
    {
	p = BITMAP(j,XBIT-1);
	for (k = XBIT - 1; ((k >= 0) && (*p == 0)); --k)
	    --p;		/* trim white space */
    }
    ytop = j;
#else
    ytop = YBIT-1;
#endif

    k = -1;	    /* find bottom non-zero raster */
    for (j = 0; (j < ytop) && (k < 0); ++j) /* loop over raster lines */
    {

#if    IBM_PC_MICROSOFT
	for (k = XBIT - 1;((k >= 0) && (*BITMAP(j,k) == 0));--k)
	    ;		/* trim white space */
#else
	p = BITMAP(j,XBIT-1);
	for (k = XBIT - 1; ((k >= 0) && (*p == 0)); --k)
	    --p;		/* trim white space */
#endif

    }
    ybottom = MAX(0,j-1);

#if    ZAPTHISOUT
    for (j = ytop; (j >= ybottom); --j)
        {
	OUTF("%5d:",(int)j);
        for (k = 0; k < XBIT; ++k)
            OUTF(" %9x",*BITMAP(j,k));
	NEWLINE(plotfp);
        }
#endif


#ifdef YOFF
    ycnt = 0;
    for (j = ytop; (j >= ybottom) ; --j)	/* loop over raster lines */
      {
	if (isNul (BITMAP(j,0)))
	  ycnt ++;
	else
	{
	    if (ycnt) OUTF("\033*p+%dY",ycnt);
	    outline(BITMAP(j,0));
	    ycnt = 0;
	}
      }
#else
    for (j = ytop; (j >= ybottom) ; --j)	/* loop over raster lines */
	outline(BITMAP(j,0));
#endif YOFF

    OUTS("\033*rB\f");			/* end raster graphics, eject page */

    (void)fflush(plotfp);
    if (DISKFULL(plotfp))
	(void)fatal("Output error -- disk storage probably full");
}
#ifdef YOFF
isNul (pbit) UNSIGN32 *pbit;	
{
  UNSIGN32 * p;
#if    IBM_PC_MICROSOFT
  int last_word;
  for (last_word = XBIT - 1;
	(last_word >= 1) && (*(UNSIGN32*)normaddr(pbit,last_word) == 0);
	--last_word)
        ;				/* trim white space a word at a time */
   if (last_word <=1) return 1;
   return 0;
#else
  p = pbit + XBIT - 1;		/* point to last word on line */
  while ( !*p && p>pbit ) p--;
  if (p==pbit && !*p) return 1;
  return 0;
#endif IBM_PC_MICROSOFT
}
#endif YOFF

#include "outrow.h"
#include "prtpage.h"
#include "readfont.h"
#include "readgf.h"
#include "readpk.h"
#include "readpost.h"
#include "readpxl.h"
#include "reldfont.h"
#include "rulepxl.h"
#include "setchar.h"
#include "setfntnm.h"
#include "setrule.h"
#include "signex.h"
#include "skgfspec.h"
#include "skipfont.h"
#include "skpkspec.h"
#include "special.h"
#include "strchr.h"
#include "strcm2.h"
#include "strid2.h"
#include "strrchr.h"
#include "tctos.h"
#include "usage.h"
#include "warning.h"