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/*
* Here's the code to load a VF file into memory.
* Any resemblance between this file and loadfont.c is purely uncoincidental.
*/
#include "dvips.h" /* The copyright notice in that file is included too! */
#ifdef KPATHSEA
#include <kpathsea/c-pathmx.h>
#include <kpathsea/concatn.h>
#endif
/*
* The external declarations:
*/
#include "protos.h"
/*
* Now we have some routines to get stuff from the VF file.
* Subroutine vfbyte returns the next byte.
*/
static FILE *vffile;
static char name[500];
static void
badvf(const char *s)
{
char *msg = concatn("! Bad VF file ", name, ": ", s, NULL);
error(msg);
}
static shalfword
vfbyte(void)
{
register shalfword i;
if ((i=getc(vffile))==EOF)
badvf("unexpected eof");
return(i);
}
static integer
vfquad(void)
{
register integer i;
i = vfbyte();
if (i > 127)
i -= 256;
i = i * 256 + vfbyte();
i = i * 256 + vfbyte();
i = i * 256 + vfbyte();
return(i);
}
static integer
vftrio(void)
{
register integer i;
i = vfbyte();
i = i * 256 + vfbyte();
i = i * 256 + vfbyte();
return(i);
}
static int
vfopen(register fontdesctype *fd)
{
register char *n;
#ifndef KPATHSEA
register char *d;
#endif
n = fd->name;
#ifndef KPATHSEA
d = fd->area;
if (*d==0)
d = vfpath;
#endif
if (strlen(n) + 5 >= sizeof (name)) {
/* 5 for vf() + null */
error("! VF file name too long in vfopen");
}
#ifdef MVSXA /* IBM: MVS/XA */
sprintf(name, "vf(%s)", n);
#else
sprintf(name, "%s.vf", n);
#endif
#ifdef KPATHSEA
if (0 != (vffile=search(vfpath, name, READBIN)))
#else
if (0 != (vffile=search(d, name, READBIN)))
#endif
return(1);
if (!noomega)
#ifdef KPATHSEA
if (0 != (vffile=search(ovfpath, n, READBIN)))
#else
if (0 != (vffile=search(d, n, READBIN)))
#endif
return(2);
return(0);
}
/*
* The following routine is like fontdef, but for local fontdefs in VF files.
*/
static fontmaptype *
vfontdef(integer s, int siz)
{
register integer i, j, fn;
register fontdesctype *fp;
register fontmaptype *cfnt;
char *nam, *area;
integer cksum, scsize, dssize;
fn = vfbyte();
while (siz-- > 1)
fn = (fn << 8) + vfbyte();
cfnt = (fontmaptype *)mymalloc((integer)sizeof(fontmaptype));
cfnt->fontnum = fn;
cksum = vfquad();
scsize = scalewidth(s, vfquad());
dssize = (integer)(alpha * (real)vfquad());
i = vfbyte(); j = vfbyte();
if (nextstring + i + j > maxstring)
error("! out of string space");
area = nextstring;
for (; i>0; i--)
*nextstring++ = vfbyte();
*nextstring++ = 0;
nam = nextstring;
for (; j>0; j--)
*nextstring++ = vfbyte();
*nextstring++ = 0;
fp = matchfont(nam, area, scsize, (char *)0);
if (fp) {
nextstring = nam;
fp->checksum = cksum;
} else {
fp = newfontdesc(cksum, scsize, dssize, nam, area);
fp->next = fonthead;
fonthead = fp;
}
cfnt->desc = fp;
return (cfnt);
}
/*
* Now our virtualfont routine.
*/
Boolean
virtualfont(register fontdesctype *curfnt)
{
register integer i, j;
register shalfword cmd;
register integer k;
register integer length;
register integer cc;
register chardesctype *cd;
integer scaledsize = curfnt->scaledsize;
integer no_of_chars=256;
integer maxcc=255;
register quarterword *tempr;
fontmaptype *fm, *newf;
int kindfont;
kindfont = vfopen(curfnt); /* 1 for TeX and pTeX, 2 for Omega */
if (!kindfont)
return (0);
#ifdef DEBUG
if (dd(D_FONTS))
fprintf(stderr,"Loading virtual font %s at %.1fpt\n",
name, (real)scaledsize/(alpha*0x100000));
#endif /* DEBUG */
/*
* We clear out some pointers:
*/
if (kindfont==2) {
no_of_chars = VF_MEM_UNIT;
curfnt->maxchars=VF_MEM_UNIT;
free(curfnt->chardesc);
curfnt->chardesc = (chardesctype *)
mymalloc(VF_MEM_UNIT * (integer)sizeof(chardesctype));
}
for (i=0; i<no_of_chars; i++) {
curfnt->chardesc[i].TFMwidth = 0;
curfnt->chardesc[i].packptr = NULL;
curfnt->chardesc[i].pixelwidth = 0;
curfnt->chardesc[i].flags = 0;
curfnt->chardesc[i].flags2 = 0;
}
if (vfbyte()!=247)
badvf("expected pre");
if (vfbyte()!=202)
badvf("wrong id byte");
for(i=vfbyte(); i>0; i--)
vfbyte();
k = vfquad();
check_checksum (k, curfnt->checksum, curfnt->name);
k = (integer)(alpha * (real)vfquad());
if (k > curfnt->designsize + 2 || k < curfnt->designsize - 2) {
int id = 0;
if (!noptex) {
tfmopen(curfnt); /* We check if parent is jfm or not. */
id = tfm16();
fclose(tfmfile);
}
if (id != 9 && id != 11) {
char *msg = concat("Design size mismatch in font ", name);
error(msg);
free(msg);
}
}
/*
* Now we look for font definitions.
*/
fm = NULL;
while ((cmd=vfbyte())>=243) {
if (cmd>246)
badvf("unexpected command in preamble");
newf = vfontdef(scaledsize, cmd-242);
if (fm)
fm->next = newf;
else curfnt->localfonts = newf;
fm = newf;
fm->next = NULL; /* FIFO */
}
/*
* Now we get down to the serious business of reading character definitions.
*/
do {
if (cmd==242) {
length = vfquad() + 2;
if (length<2) badvf("negative length packet");
if (length>65535) badvf("packet too long");
cc = vfquad();
if (cc>=no_of_chars && cc<MAX_CODE) {
j = VF_MEM_UNIT * ((integer)(cc/VF_MEM_UNIT) + 1);
curfnt->chardesc = (chardesctype *)xrealloc(curfnt->chardesc,
sizeof(chardesctype)*j);
for (i=no_of_chars; i<j; i++) {
curfnt->chardesc[i].TFMwidth = 0;
curfnt->chardesc[i].packptr = NULL;
curfnt->chardesc[i].pixelwidth = 0;
curfnt->chardesc[i].flags = 0;
curfnt->chardesc[i].flags2 = 0;
}
no_of_chars = j;
curfnt->maxchars=no_of_chars;
}
else if (cc<0 || cc>=no_of_chars) badvf("character code out of range");
cd = curfnt->chardesc + cc;
cd->TFMwidth = scalewidth(vfquad(), scaledsize);
} else {
length = cmd + 2;
cc = vfbyte();
cd = curfnt->chardesc + cc;
cd->TFMwidth = scalewidth(vftrio(), scaledsize);
}
maxcc = (maxcc<cc) ? cc : maxcc;
if (cd->TFMwidth >= 0)
cd->pixelwidth = ((integer)(conv*cd->TFMwidth+0.5));
else
cd->pixelwidth = -((integer)(conv*-cd->TFMwidth+0.5));
cd->flags = EXISTS;
cd->flags2 = EXISTS;
if (bytesleft < length) {
#ifdef DEBUG
if (dd(D_MEM))
fprintf(stderr,
#ifdef SHORTINT
"Allocating new raster memory (%ld req, %ld left)\n",
#else
"Allocating new raster memory (%d req, %ld left)\n",
#endif
length, bytesleft);
#endif /* DEBUG */
if (length > MINCHUNK) {
tempr = (quarterword *)mymalloc((integer)length);
bytesleft = 0;
} else {
raster = (quarterword *)mymalloc((integer)RASTERCHUNK);
tempr = raster;
bytesleft = RASTERCHUNK - length;
raster += length;
}
} else {
tempr = raster;
bytesleft -= length;
raster += length;
}
cd->packptr = tempr;
length -= 2;
*tempr++ = length / 256;
*tempr++ = length % 256;
for (; length>0; length--)
*tempr++ = vfbyte();
cmd = vfbyte();
} while (cmd < 243);
if (cmd != 248)
badvf("missing postamble");
fclose(vffile);
curfnt->loaded = 2;
if (maxcc+1<no_of_chars) {
curfnt->chardesc = (chardesctype *)
xrealloc(curfnt->chardesc,
(maxcc+1) * (integer)sizeof(chardesctype));
curfnt->maxchars=maxcc+1;
}
return (1);
}
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