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/*
* Code for allowing fonts to be used in PostScript files given via
* `psfile=...'.
*/
#include "dvips.h" /* The copyright notice in that file is included too! */
#include <kpathsea/c-ctype.h>
#ifdef VMS
#define getname vms_getname
#endif
#ifndef STDC_HEADERS
double atof();
#endif
/*
* These are the external routines we call.
*/
extern fontdesctype *newfontdesc() ;
extern fontdesctype *matchfont() ;
extern Boolean prescanchar() ;
extern Boolean preselectfont() ;
extern void error() ;
extern void scout(), error() ;
extern void stringend() ;
extern void cmdout() ;
extern void numout() ;
extern void lfontout() ;
extern char *newstring() ;
extern FILE *search() ;
/*
* These are the external variables we access.
*/
extern fontdesctype *curfnt ;
extern fontdesctype *fonthead ;
extern integer fontmem ;
extern fontdesctype *fonthd[MAXFONTHD] ;
extern int nextfonthd ;
extern char *nextstring ;
extern char xdig[256] ;
extern real conv ;
extern integer pagecost ;
extern int actualdpi ;
extern integer mag ;
extern Boolean includesfonts ;
/*
* Create a font descriptor for a font included in a psfile. There will be
* no fontmaptype node for the resulting font descriptor until this font is
* encountered by fontdef() (if that ever happens).
*/
fontdesctype *
ifontdef(name, area, scsize, dssize, scname)
char *name, *scname, *area ;
integer scsize, dssize ;
{
fontdesctype *fp;
fp = newfontdesc((integer)0, scsize, dssize, name, area);
fp->scalename = scname;
fp->next = fonthead ;
fonthead = fp ;
return fp;
}
/*
* When a font appears in an included psfile for the first time, this routine
* links it into the fonthd[] array.
*/
void
setfamily(f)
fontdesctype *f ;
{
int i ;
fontmem -= DICTITEMCOST;
for (i=0; i<nextfonthd; i++)
if (strcmp(f->name, fonthd[i]->name)==0
&& strcmp(f->area, fonthd[i]->area)==0) {
f->nextsize = fonthd[i];
fonthd[i] = f;
return;
}
if (nextfonthd==MAXFONTHD)
error("! Too many fonts in included psfiles") ;
fontmem -= NAMECOST + strlen(f->name) + strlen(f->area) ;
fonthd[nextfonthd++] = f ;
f->nextsize = NULL ;
}
/*
* Convert file name s to a pair of new strings in the string pool.
* The first string is the original value of nextstring; the second
* string is the return value.
*/
char*
getname(s)
char *s ;
{
char *a, *p, sav;
a = NULL;
for (p=s; *p!=0; p++)
if (*p=='/')
a = p+1 ;
if (a==NULL) *nextstring++ = 0 ;
else { sav = *a ;
*a = 0 ;
(void) newstring(s) ;
*a = sav ;
s = a ;
}
return newstring(s);
}
/*
* Mark character usage in *f based on the hexadicimal bitmap found in
* string s. A two-digit offset separated by a colon gives the initial
* character code. We have no way of knowing how many times each character
* is used or how many strings get created when showing the characters so
* we just estimate two usages per character and one string per pair of
* usages.
*/
void
includechars(f, s)
fontdesctype *f ;
char *s ;
{
int b, c, d ;
int l = strlen(s) ;
if (l>0 && s[l-1]=='\n')
s[--l] = 0 ;
if (!ISXDIGIT(s[0]) || !ISXDIGIT(s[1]) || s[2]!=':'
|| strspn(s+3,"0123456789ABCDEFabcdef") < l-3) {
fprintf(stderr, "%s\n", s) ;
error("Bad syntax in included font usage table") ;
return ;
}
c = (xdig[(int)(s[0])] << 4) + xdig[(int)(s[1])] ;
s += 2 ;
while (*++s) {
d = xdig[(int)*s] ;
for (b=8; b!=0; b>>=1) {
if ((d&b)!=0) {
pagecost ++ ;
(void) prescanchar(&f->chardesc[c]) ;
}
if (++c==256) return ;
}
}
}
/*
* String p should be start after the ":" in a font declaration of the form
%*FONT: <tfm-name> <scaled-size> <design-size> <2-hex-digits>:<hex-string>
* where the sizes are floating-point numbers in units of PostScript points
* (TeX's "bp"). We update the data structures for the included font,
* charge fontmem for the VM used, and add to delchar if necessary.
* Note that the scaled size and the design size are multiplied by mag/1000.
* This is needed for the design size to undo the similar factor in conv since
* design sizes are not supposed to be affected by magnification. Applying
* the magnification factor to the scaled size selects magnified fonts as is
* appropriate in the normal case where the included PostScript is scaled by
* mag/1000. The definition of `fshow' in finclude.lpro unscales by `DVImag'
* to account for this. We cannot change the font scaled size to account for
* options like `hscale=' because then the definition of `fshow' would have
* to change.
*/
void
scan1fontcomment(p)
char *p ;
{
char *q, *name, *area;
char *scname; /* location in buffer where we got scsize */
integer scsize, dssize;
fontdesctype *fptr;
real DVIperBP;
DVIperBP = actualdpi/(72.0*conv) * (mag/1000.0);
p = strtok(p, " ");
if (p==NULL) return;
area = nextstring ; /* tentatively in the string pool */
name = getname(p);
q = strtok((char *)0, " ");
if (p==NULL || (scsize=(integer)(atof(q)*DVIperBP))==0) {
fprintf(stderr, "%s\n",p);
error("No scaled size for included font");
nextstring = area ; /* remove from string pool */
return;
}
scname = q;
q = strtok((char *)0, " ");
if (p==NULL || (dssize=(integer)(atof(q)*DVIperBP))==0) {
fprintf(stderr, "%s\n",p);
error("No design size for included font");
nextstring = area ;
return;
}
q = strtok((char *)0, " ");
fptr = matchfont(name, area, scsize, scname);
if (!fptr) {
fptr = ifontdef(name, area, scsize, dssize, newstring(scname));
(void) preselectfont(fptr);
setfamily(fptr);
} else {
nextstring = area; /* remove from string pool */
(void) preselectfont(fptr);
if (fptr->scalename==NULL) {
fptr->scalename=newstring(scname);
setfamily(fptr);
}
}
includesfonts = 1;
fptr->psflag |= THISPAGE;
includechars(fptr, q);
}
/*
* Parse the arguments to a "%%VMusage" comment. The Adobe Type 1 Font Format
* book specifies two arguments. This routine will accept one or two arguments;
* if there are two arguments we take the maximum.
*/
integer
scanvm(p)
char *p ;
{
char* q;
integer vm, vmmax;
q = strtok(p, " ");
if (q==NULL) {
error("Missing data in VMusage comment");
return 0;
}
vmmax = atol(q);
q = strtok((char *)0, " ");
if (q!=NULL && (vm=atol(q))>vmmax)
vmmax = vm;
return vmmax;
}
/*
* Scan an initial sequence of comment lines looking for font and memory
* usage specifications. This does not handle the "atend" construction.
*/
void
scanfontcomments(filename)
char* filename ;
{
char p[500];
FILE *f;
integer truecost = pagecost ;
Boolean trueknown = 0 ;
fontdesctype *oldcf = curfnt;
f = search(figpath, filename, READ) ;
if (f) {
while (fgets(p,500,f) && p[0]=='%' &&
(p[1]=='!' || p[1]=='%' || p[1]=='*'))
if (strncmp(p, "%*Font:", 7) == 0)
scan1fontcomment(p+7);
else if (strncmp(p, "%%VMusage:", 9) == 0) {
truecost += scanvm(p+10) ;
trueknown = 1 ;
}
if (trueknown)
pagecost = truecost ;
fclose(f) ;
}
curfnt = oldcf;
}
/*
* Is string s less than 30 characters long with no special characters
* that are not allowed in PostScript commands.
*/
Boolean
okascmd(ss)
char *ss ;
{
register c = 0 ;
register char *s = ss ;
while (*s)
if (*s<' ' || *s>126 || ++c==30)
return(0) ;
return(strcspn(ss,"()<>[]{}%/") == c) ;
}
/*
* Output font area and font name strings as a literal string
*/
void
nameout(area, name)
char *area, *name ;
{
char buf[30] ;
char *s ;
if (*area==0 && okascmd(name)) {
(void)sprintf(buf, "/%s", name) ;
cmdout(name);
} else {
for (s=area; *s; s++)
scout(*s) ;
for (s=name; *s; s++)
scout(*s) ;
stringend();
cmdout("cvn") ;
}
}
/*
* Output commands for defining a table of PostScript font identifiers for
* fonts used in included psfiles in the current section.
*/
void
fonttableout()
{
int i, k;
fontdesctype *f;
for (i=0; i<nextfonthd; i++) {
for (f=fonthd[i]; f!=NULL; f=f->nextsize)
if (f->psflag==EXISTS) break;
if (f!=NULL) {
nameout(f->area, f->name);
k = 0;
do { if (f->psflag==EXISTS) {
cmdout(f->scalename);
lfontout((int)f->psname);
}
f = f->nextsize;
k++;
} while (f!=NULL);
numout((integer)k);
cmdout("fstore");
}
}
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.