Date: 20-MAR-1989 17:20:04 GMT
From: PHYOKANE@CS8700.UCG.IE
To: abbottp@ASTON.AC.UK
Subject: file dvifile_p.h
sender: hea"phyokane@cs8700.ucg.ie" <phyokane@cs8700.ucg.ie>
/* -*-C-*- dvifile.h */
/*-->dvifile*/
/**********************************************************************/
/****************************** dvifile *******************************/
/**********************************************************************/
void
dvifile(argc,argv,filestr)
int argc; /* argument count */
char* argv[]; /* argument strings */
char* filestr; /* DVI filename to process */
{
#define PAGENUMBER(p) ((p) < 0 ? (page_count + 1 + (p)) : (p))
register INT16 i,j,m; /* loop indices */
register INT16 swap; /* swap storage */
register struct font_entry *p;
INT16 m_begin,m_end,m_step; /* loop limits and increment */
INT16 list[3]; /* index list for sort */
char tempstr[MAXSTR]; /* temporary string storage */
int the_char;
int s;
int slot;
int n_slots;
int fontsize;
int pfont_size;
int pfont_n;
struct font_entry *bigfont;
struct printer_font *pptr;
/*
Establish the default font file search order. This is done here
instead of in initglob() or option(), because both could set
fontlist[].
By default, the search list contains names for the PK, GF, and PXL
font files; that order corresponds to increasing size (and
therefore, presumably, increasing processing cost) of font raster
information. This search order may be overridden at run time by
defining an alternate one in the environment variable FONTLIST; the
order of the strings "PK", "GF", and "PXL" in that variable
determines the search order, and letter case is NOT significant.
The substrings may be separated by zero or more arbitrary
characters, so the values "PK-GF-PXL", "PK GF PXL", "PKGFPXL",
"PK;GF;PXL", "PK/GF/PXL" are all acceptable, and all choose the
default search order. This flexibility in separator character
choice is occasioned by the requirement on some systems that the
environment variable have the syntax of a file name, or be a single
"word". If any substring is omitted, then that font will be
excluded from consideration. Thus, "GF" permits the use only of GF
font files.
The indexes gf_index, pk_index, and pxl_index are in -1 .. 2, and at
least one must be non-negative. A negative index excludes that font
file type from the search.
*/
/* Note that non-negative entries in list[] are UNIQUE. */
list[0] = gf_index = (INT16)strid2(fontlist,"GF");
list[1] = pk_index = (INT16)strid2(fontlist,"PK");
list[2] = pxl_index = (INT16)strid2(fontlist,"PXL");
for (i = 0; i < 3; ++i) /* put list in non-decreasing order */
for (j = i+1; j < 3; ++j)
if (list[i] > list[j])
{
swap = list[i];
list[i] = list[j];
list[j] = swap;
}
for (i = 0; i < 3; ++i) /* assign indexes 0,1,2 */
if (list[i] >= 0)
{
if (list[i] == gf_index)
gf_index = i;
else if (list[i] == pk_index)
pk_index = i;
else if (list[i] == pxl_index)
pxl_index = i;
}
if ((gf_index < 0) && (pk_index < 0) && (pxl_index < 0))
(void)fatal("dvifile(): FONTLIST does not define at least one of \
GF, PK, or PXL fonts");
(void)dviinit(filestr); /* initialize DVI file processing */
(void)devinit(argc,argv); /* initialize device output */
(void)readpost();
(void)FSEEK(dvifp, 14L, 0); /* position past preamble */
(void)getbytes(dvifp, tempstr,
(BYTE)nosignex(dvifp,(BYTE)1)); /* flush DVI comment */
cur_page_number = 0;
#if (HPLASERJET|HPJETPLUS|GOLDENDAWNGL100|POSTSCRIPT|IMPRESS|CANON_A2)
/* print pages in reverse order because of laser printer */
/* page stacking */
if (backwards)
{
m_begin = 1;
m_end = page_count;
m_step = 1;
}
else /* normal device order */
{
m_begin = page_count;
m_end = 1;
m_step = -1;
}
#else
/* NOT (HPLASERJET|HPJETPLUS|GOLDENDAWNGL100|POSTSCRIPT|IMPRESS|CANON_A2) */
/* print pages in forward order for most devices */
if (backwards)
{
m_begin = page_count;
m_end = 1;
m_step = -1;
}
else
{
m_begin = 1;
m_end = page_count;
m_step = 1;
}
#endif /* (HPLASERJET|HPJETPLUS|GOLDENDAWNGL100|POSTSCRIPT|IMPRESS|CANON_A2) */
for (i = 0; i < npage; ++i) /* make page numbers positive */
{ /* and order pairs non-decreasing */
page_begin[i] = PAGENUMBER(page_begin[i]);
page_end[i] = PAGENUMBER(page_end[i]);
if (page_begin[i] > page_end[i])
{
swap = page_begin[i];
page_begin[i] = page_end[i];
page_end[i] = swap;
}
}
/* First pass over pages and setup font download information */
for (m = m_begin; ; m += m_step)
{
for (i = 0; i < npage; ++i) /* search page list */
if ( IN(page_begin[i],m,page_end[i]) &&
(((m - page_begin[i]) % page_step[i]) == 0) )
{
if (!quiet) /* start progress report */
(void)fprintf(stderr,"[%d", m);
cur_page_number++;/* sequential page number 1..N */
cur_index = m-1; /* remember index globally */
checkpage(page_ptr[cur_index]);
if (!quiet) /* finish progress report */
(void)fprintf(stderr,"] ");
break;
}
if (m == m_end) /* exit loop after last page */
break;
}
if (!quiet) /* finish progress report */
(void)fprintf(stderr,"\n");
/* Initialize the printer fonts */
for (pf = FIRSTPRINTERFONT; pf <= LASTPRINTERFONT; pf++)
{
printer_fonts[pf].slots_free = 190;
for (s = 0; s < 190; s++)
{
printer_fonts[pf].char_slots[s].tex_char = -1;
printer_fonts[pf].char_slots[s].tex_font = NULL;
}
}
/* Pack the TeX fonts into printer fonts
WHILE there are unassigned TeX fonts
select the largest TeX font
if possible assign all of the TeX font
to the FIRST SMALLEST SPACE free in the printer fonts
else
find the FIRST LARGEST SPACE free and assign as much
of the TeX font as will fit
*/
do {
/* First....find the largest TeX font left....*/
fontsize = 0;
bigfont = NULL;
fontptr = hfontptr;
while ((fontptr != (struct font_entry *)NULL))
{
if ((fontptr->used_chars - fontptr->assigned_chars) > fontsize)
{
fontsize = fontptr->used_chars - fontptr->assigned_chars;
bigfont = fontptr;
}
fontptr = fontptr->next;
}
if (bigfont == NULL) break; /* All TeX fonts assigned */
fontptr = bigfont;
fontsize = (fontsize > 190) ? 190 : fontsize;
/* Next... find a printer font to put it in.... */
pfont_size = 1000;
for (pf = FIRSTPRINTERFONT; pf <= LASTPRINTERFONT; pf++)
{
if ((printer_fonts[pf].slots_free >= fontsize) &&
(printer_fonts[pf].slots_free < pfont_size))
{
pfont_size = printer_fonts[pf].slots_free;
pfont_n = pf;
}
}
/* ...if there is no big slot then split this font... */
/* putting the first bit into the bigest free slot */
if (pfont_size > 190)
{
pfont_size = 0;
for (pf = FIRSTPRINTERFONT; pf <= LASTPRINTERFONT; pf++)
{
if (printer_fonts[pf].slots_free > pfont_size)
{
pfont_size = printer_fonts[pf].slots_free;
pfont_n = pf;
}
}
}
if (pfont_size == 0)
(void)fatal( "dvifile(): Need more printer fonts");
pf = pfont_n;
/* Printer font number pf has pfont_size slots available to take characters
from TeX font fontptr */
(void)fprintf(stderr,
"[Assigning %d characters from %s (mag = %g) to printer font %d]\n",
(fontsize <= pfont_size) ? fontsize : pfont_size,
fontptr->n,(fontptr->font_mag)/1500.0,pf);
for (the_char = FIRSTPXLCHAR; the_char <= LASTPXLCHAR; the_char++)
{
if (printer_fonts[pf].slots_free == 0)
break;
if (fontptr->ch[the_char].isloaded == FALSE) /* Not used */
continue;
if (fontptr->ch[the_char].lj_font != 65535)/* Already assigned */
continue;
slot = 190 - printer_fonts[pf].slots_free--;
printer_fonts[pf].char_slots[slot].tex_char = the_char;
printer_fonts[pf].char_slots[slot].tex_font = fontptr;
fontptr->ch[the_char].lj_char = slot;
fontptr->ch[the_char].lj_font = pf;
fontptr->assigned_chars++;
}
if ( printer_fonts[pf].slots_free == pfont_size ) /* Nothing happened !!!*/
fontptr->assigned_chars = fontptr->used_chars;/* Zero size font ?? */
} while (TRUE);
/* .... and finally download the fonts to the printer.... */
for (pf = FIRSTPRINTERFONT; pf <= LASTPRINTERFONT; pf++)
{
pptr = &printer_fonts[pf];
if (pptr->slots_free == 190) continue;
slot = 0;
n_slots = 190 - pptr->slots_free;
(void)fprintf(stderr,"[Loading printer font %d with %d characters]\n",
pf,n_slots);
(void)makefont(pptr,n_slots);
do {
fontptr = pptr->char_slots[slot].tex_font;
while ( (slot < n_slots) &&
(pptr->char_slots[slot].tex_font == fontptr) )
{
loadchar(pptr->char_slots[slot].tex_char,MAP_CHAR(slot));
++slot;
}
} while ( slot < n_slots );
}
#if (HPJETPLUS | POSTSCRIPT | IMPRESS | CANON_A2)
pf = -1;
#endif
/* Finally pass over pages and print them */
for (m = m_begin; ; m += m_step)
{
for (i = 0; i < npage; ++i) /* search page list */
if ( IN(page_begin[i],m,page_end[i]) &&
(((m - page_begin[i]) % page_step[i]) == 0) )
{
if (!quiet) /* start progress report */
(void)fprintf(stderr,"[%d", m);
cur_page_number++;/* sequential page number 1..N */
cur_index = m-1; /* remember index globally */
prtpage(page_ptr[cur_index]);
if (!quiet) /* finish progress report */
(void)fprintf(stderr,"] ");
break;
}
if (m == m_end) /* exit loop after last page */
break;
}
(void)devterm(); /* terminate device output */
(void)dviterm(); /* terminate DVI file processing */
}