static void
pdf_makewidthtable(pdf_fontdesc *fontdesc)
{
fz_font *font = fontdesc->font;
int i, k, cid, gid;
font->widthcount = 0;
for (i = 0; i < fontdesc->nhmtx; i++)
{
for (k = fontdesc->hmtx[i].lo; k <= fontdesc->hmtx[i].hi; k++)
{
cid = pdf_lookupcmap(fontdesc->encoding, k);
gid = pdf_fontcidtogid(fontdesc, cid);
if (gid > font->widthcount)
font->widthcount = gid;
}
}
font->widthcount ++;
font->widthtable = fz_malloc(sizeof(int) * font->widthcount);
memset(font->widthtable, 0, sizeof(int) * font->widthcount);
for (i = 0; i < fontdesc->nhmtx; i++)
{
for (k = fontdesc->hmtx[i].lo; k <= fontdesc->hmtx[i].hi; k++)
{
cid = pdf_lookupcmap(fontdesc->encoding, k);
gid = pdf_fontcidtogid(fontdesc, cid);
font->widthtable[gid] = fontdesc->hmtx[i].w;
}
}
}
void
pdf_showstring(pdf_csi *csi, unsigned char *buf, int len)
{
pdf_gstate *gstate = csi->gstate + csi->gtop;
pdf_fontdesc *fontdesc = gstate->font;
unsigned char *end = buf + len;
int cpt, cid;
if (!fontdesc)
{
fz_warn("cannot draw text since font and size not set");
return;
}
while (buf < end)
{
buf = pdf_decodecmap(fontdesc->encoding, buf, &cpt);
cid = pdf_lookupcmap(fontdesc->encoding, cpt);
if (cid >= 0)
pdf_showglyph(csi, cid);
else
fz_warn("cannot encode character with code point %#x", cpt);
if (cpt == 32)
pdf_showspace(csi, gstate->wordspace);
}
}
static inline int ftcidtogid(pdf_fontdesc *fontdesc, int cid)
{
if (fontdesc->tottfcmap)
{
cid = pdf_lookupcmap(fontdesc->tottfcmap, cid);
return ftcharindex(fontdesc->font->ftface, cid);
}
if (fontdesc->cidtogid)
return fontdesc->cidtogid[cid];
return cid;
}
static inline int ftcidtogid(pdf_font *font, int cid)
{
if (font->tottfcmap)
{
cid = pdf_lookupcmap(font->tottfcmap, cid);
return FT_Get_Char_Index(font->ftface, cid);
}
if (font->cidtogid)
return font->cidtogid[cid];
return cid;
}
fz_error *
pdf_showtext(pdf_csi *csi, fz_obj *text)
{
pdf_gstate *gstate = csi->gstate + csi->gtop;
pdf_font *font = gstate->font;
fz_error *error;
unsigned char *buf;
unsigned char *end;
int i, len;
int cpt, cid;
if (fz_isarray(text))
{
for (i = 0; i < fz_arraylen(text); i++)
{
fz_obj *item = fz_arrayget(text, i);
if (fz_isstring(item))
{
error = pdf_showtext(csi, item);
if (error)
return fz_rethrow(error, "cannot draw text item");
}
else
{
showspace(csi, - fz_toreal(item) * gstate->size / 1000.0);
}
}
return fz_okay;
}
buf = (unsigned char *)fz_tostrbuf(text);
len = fz_tostrlen(text);
end = buf + len;
while (buf < end)
{
buf = pdf_decodecmap(font->encoding, buf, &cpt);
cid = pdf_lookupcmap(font->encoding, cpt);
if (cid == -1)
cid = 0;
error = showglyph(csi, cid);
if (error)
return fz_rethrow(error, "cannot draw glyph");
if (cpt == 32)
showspace(csi, gstate->wordspace);
}
return fz_okay;
}
void
pdf_showtext(pdf_csi *csi, fz_obj *text)
{
pdf_gstate *gstate = csi->gstate + csi->gtop;
pdf_fontdesc *fontdesc = gstate->font;
unsigned char *buf;
unsigned char *end;
int i, len;
int cpt, cid;
if (!fontdesc)
{
fz_warn("cannot draw text since font and size not set");
return;
}
if (fz_isarray(text))
{
for (i = 0; i < fz_arraylen(text); i++)
{
fz_obj *item = fz_arrayget(text, i);
if (fz_isstring(item))
pdf_showtext(csi, item);
else
pdf_showspace(csi, - fz_toreal(item) * gstate->size * 0.001f);
}
}
if (fz_isstring(text))
{
buf = (unsigned char *)fz_tostrbuf(text);
len = fz_tostrlen(text);
end = buf + len;
while (buf < end)
{
buf = pdf_decodecmap(fontdesc->encoding, buf, &cpt);
cid = pdf_lookupcmap(fontdesc->encoding, cpt);
if (cid == -1)
cid = 0;
pdf_showglyph(csi, cid);
if (cpt == 32)
pdf_showspace(csi, gstate->wordspace);
}
}
}
fz_error
pdf_loadtounicode(pdf_fontdesc *font, pdf_xref *xref,
char **strings, char *collection, fz_obj *cmapstm)
{
fz_error error = fz_okay;
pdf_cmap *cmap;
int cid;
int ucsbuf[8];
int ucslen;
int i;
if (pdf_isstream(xref, fz_tonum(cmapstm), fz_togen(cmapstm)))
{
pdf_logfont("tounicode embedded cmap\n");
error = pdf_loadembeddedcmap(&cmap, xref, cmapstm);
if (error)
return fz_rethrow(error, "cannot load embedded cmap (%d %d R)", fz_tonum(cmapstm), fz_togen(cmapstm));
font->tounicode = pdf_newcmap();
for (i = 0; i < (strings ? 256 : 65536); i++)
{
cid = pdf_lookupcmap(font->encoding, i);
if (cid >= 0)
{
ucslen = pdf_lookupcmapfull(cmap, i, ucsbuf);
if (ucslen == 1)
pdf_maprangetorange(font->tounicode, cid, cid, ucsbuf[0]);
if (ucslen > 1)
pdf_maponetomany(font->tounicode, cid, ucsbuf, ucslen);
}
}
pdf_sortcmap(font->tounicode);
pdf_dropcmap(cmap);
}
else if (collection)
{
pdf_logfont("tounicode cid collection (%s)\n", collection);
error = fz_okay;
if (!strcmp(collection, "Adobe-CNS1"))
error = pdf_loadsystemcmap(&font->tounicode, "Adobe-CNS1-UCS2");
else if (!strcmp(collection, "Adobe-GB1"))
error = pdf_loadsystemcmap(&font->tounicode, "Adobe-GB1-UCS2");
else if (!strcmp(collection, "Adobe-Japan1"))
error = pdf_loadsystemcmap(&font->tounicode, "Adobe-Japan1-UCS2");
else if (!strcmp(collection, "Adobe-Japan2"))
error = pdf_loadsystemcmap(&font->tounicode, "Adobe-Japan2-UCS2"); /* where's this? */
else if (!strcmp(collection, "Adobe-Korea1"))
error = pdf_loadsystemcmap(&font->tounicode, "Adobe-Korea1-UCS2");
if (error)
return fz_rethrow(error, "cannot load tounicode system cmap %s-UCS2", collection);
}
if (strings)
{
pdf_logfont("tounicode strings\n");
/* TODO one-to-many mappings */
font->ncidtoucs = 256;
font->cidtoucs = fz_calloc(256, sizeof(unsigned short));
for (i = 0; i < 256; i++)
{
if (strings[i])
font->cidtoucs[i] = pdf_lookupagl(strings[i]);
else
font->cidtoucs[i] = '?';
}
}
if (!font->tounicode && !font->cidtoucs)
{
pdf_logfont("tounicode could not be loaded\n");
/* TODO: synthesize a ToUnicode if it's a freetype font with
* cmap and/or post tables or if it has glyph names. */
}
return fz_okay;
}
