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/*
* Stores the data from a font definition into the global data structures.
* A routine skipnop is also included to handle nops and font definitions
* between pages.
*/
#include "dvips.h" /* The copyright notice in that file is included too! */
#ifdef KPATHSEA
#include <kpathsea/magstep.h>
#endif
/*
* The external declarations:
*/
#include "protos.h"
/*
* newfontdesc creates a new font descriptor with the given parameters and
* returns a pointer to the new object.
*/
fontdesctype*
newfontdesc(integer cksum, integer scsize, integer dssize,
char *name, char *area)
{
register fontdesctype *fp;
fp = (fontdesctype *)mymalloc((integer)sizeof(fontdesctype));
fp->chardesc = (chardesctype *)mymalloc(256*(integer)sizeof(chardesctype));
fp->maxchars = 256;
fp->iswide = 0;
fp->psname = 0;
fp->loaded = 0;
fp->checksum = cksum;
fp->scaledsize = scsize;
fp->designsize = dssize;
fp->thinspace = scsize / 6;
fp->scalename = NULL;
fp->psflag = 0;
fp->codewidth = 1;
fp->name = name;
#ifdef VMCMS /* IBM: VM/CMS */
{
int i;
for ( i=0; fp->name[i]; i++ )
fp->name[i] = ascii2ebcdic[ fp->name[i] ];
}
#else
#ifdef MVSXA /* IBM: MVS/XA */
{
int i;
for ( i=0; fp->name[i]; i++ )
fp->name[i] = ascii2ebcdic[ fp->name[i] ];
}
#endif /* IBM: MVS/XA */
#endif /* IBM: VM/CMS */
fp->area = area;
fp->resfont = NULL;
fp->localfonts = NULL;
#ifdef KPATHSEA
fp->dpi = kpse_magstep_fix ((halfword)(mag*(float)fp->scaledsize*DPI/
((float)fp->designsize*1000.0)+0.5), DPI, NULL);
#else
fp->dpi = dpicheck((halfword)(mag*fp->scaledsize*DPI/
((float)fp->designsize*1000.0)+0.5));
#endif
fp->loadeddpi = fp->dpi;
#ifdef DEBUG
if (dd(D_FONTS))
(void)fprintf(stderr,"Defining font (%s) %s at %.1fpt\n",
area, name, (real)scsize/(alpha*0x100000));
#endif /* DEBUG */
return fp;
}
/*
* Try to find a font with a given name and approximate scaled size, returning
* NULL if unsuccessful. If scname and the font's scalename are both
* non-NULL they must match exactly. If both are NULL, scsize and the
* font's scaledsize come from the dvi file and should match exactly.
* Otherwise there can be some slop due to the inaccuracies of sizes
* read from an included psfile.
*/
fontdesctype *
matchfont(char *name, char *area, integer scsize, char *scname)
{
register fontdesctype *fp;
register integer smin, smax;
smin = scsize - fsizetol;
smax = scsize + fsizetol;
for (fp=fonthead; fp; fp=fp->next)
if (smin < fp->scaledsize && fp->scaledsize < smax &&
strcmp(name,fp->name)==0 && strcmp(area,fp->area)==0) {
if (scname == NULL) {
if (fp->scalename!=NULL || scsize==fp->scaledsize)
break;
} else {
if (fp->scalename==NULL || strcmp(scname,fp->scalename)==0)
break;
}
}
#ifdef DEBUG
if (dd(D_FONTS) && fp)
(void)fprintf(stderr,"(Already known.)\n");
#endif /* DEBUG */
return fp;
}
/*
* fontdef takes a font definition in the dvi file and loads the data
* into its data structures.
*/
void
fontdef(int siz)
{
register integer i, j, fn;
register fontdesctype *fp;
register fontmaptype *cfnt;
char *name, *area;
integer cksum, scsize, dssize;
fn = dvibyte();
while (siz-- > 1)
fn = (fn << 8) + dvibyte();
for (cfnt=ffont; cfnt; cfnt = cfnt->next)
if (cfnt->fontnum == fn) goto alreadydefined;
cfnt = (fontmaptype *)mymalloc((integer)sizeof(fontmaptype));
cfnt->next = ffont;
ffont = cfnt;
cfnt->fontnum = fn;
cksum = signedquad();
scsize = signedquad();
dssize = signedquad();
i = dvibyte(); j = dvibyte();
if (nextstring + i + j > maxstring)
error("! out of string space");
area = nextstring;
for (; i>0; i--)
*nextstring++ = dvibyte();
*nextstring++ = 0;
name = nextstring;
for (; j>0; j--)
*nextstring++ = dvibyte();
*nextstring++ = 0;
fp = matchfont(name, area, scsize, (char *)0);
if (fp) {
nextstring = name;
fp->checksum = cksum;
} else {
fp = newfontdesc(cksum, scsize, dssize, name, area);
fp->next = fonthead;
fonthead = fp;
}
cfnt->desc = fp;
return;
alreadydefined:
/* A DVI file will not define a font twice; but we may be scanning
* a font definition twice because a new section has started,
* or because of collated copies. */
skipover(12);
skipover(dvibyte()+dvibyte());
}
/*
* The next routine handles nops or font definitions between pages in a
* dvi file. Returns the first command that is not a nop or font definition.
*
* Now handles specials (but ignores them)
*/
int
skipnop(void)
{
register int cmd;
while (1) {
switch(cmd=dvibyte()) {
case 138: break;
case 239: skipover((int)dvibyte()); break; /* xxx1 */
case 240: skipover((int)twobytes()); break; /* xxx2 */
case 241: skipover((int)threebytes()); break; /* xxx3 */
case 242: skipover((int)signedquad()); break; /* xxx4 */
case 243: case 244: case 245: case 246: fontdef(cmd-242); break;
default: return cmd;
}
}
}
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