*
* The TrueType Reference Manual:
* <http://developer.apple.com/textfonts/TTRefMan/>
+ *
+ * Microsoft typography specifications:
+ * <http://www.microsoft.com/typography/SpecificationsOverview.mspx>
*/
#include <assert.h>
#define TAG_head 0x68656164
#define TAG_hhea 0x68686561
#define TAG_hmtx 0x686d7478
+#define TAG_kern 0x6b65726e
#define TAG_loca 0x6c6f6361
#define TAG_name 0x6e616d65
#define TAG_post 0x706f7374
{ d_end }
};
+/* Kerning ('kern') table */
+typedef struct t_kern_Tag t_kern;
+struct t_kern_Tag {
+ unsigned version;
+ unsigned nTables;
+};
+sfnt_decode t_kern_v0_decode[] = {
+ { d_uint16, offsetof(t_kern, version) },
+ { d_uint16, offsetof(t_kern, nTables) },
+ { d_end }
+};
+typedef struct kern_v0_subhdr_Tag kern_v0_subhdr;
+struct kern_v0_subhdr_Tag {
+ unsigned version;
+ unsigned length;
+ unsigned coverage;
+};
+sfnt_decode kern_v0_subhdr_decode[] = {
+ { d_uint16, offsetof(kern_v0_subhdr, version) },
+ { d_uint16, offsetof(kern_v0_subhdr, length) },
+ { d_uint16, offsetof(kern_v0_subhdr, coverage) },
+ { d_end }
+};
+#define KERN_V0_HORIZ 0x0001
+#define KERN_V0_MINIMUM 0x0002
+#define KERN_V0_CROSSSTREAM 0x0004
+#define KERN_V0_OVERRIDE 0x0008
+#define KERN_V0_FORMAT 0xff00
+#define KERN_V0_FORMAT_0 0x0000
+sfnt_decode t_kern_v1_decode[] = {
+ { d_uint32, offsetof(t_kern, version) },
+ { d_uint32, offsetof(t_kern, nTables) },
+ { d_end }
+};
+typedef struct kern_v1_subhdr_Tag kern_v1_subhdr;
+struct kern_v1_subhdr_Tag {
+ unsigned length;
+ unsigned coverage;
+};
+sfnt_decode kern_v1_subhdr_decode[] = {
+ { d_uint32, offsetof(kern_v1_subhdr, length) },
+ { d_uint16, offsetof(kern_v1_subhdr, coverage) },
+ { d_skip(2) }, /* tupleIndex */
+ { d_end }
+};
+#define KERN_V1_VERTICAL 0x8000
+#define KERN_V1_CROSSSTREAM 0x4000
+#define KERN_V1_VARIATION 0x2000
+#define KERN_V1_FORMAT 0x00ff
+#define KERN_V1_FORMAT_0 0x0000
+typedef struct kern_f0_Tag kern_f0;
+struct kern_f0_Tag {
+ unsigned nPairs;
+};
+sfnt_decode kern_f0_decode[] = {
+ { d_uint16, offsetof(kern_f0, nPairs) },
+ { d_skip(6) }, /* searchRange, entrySelector, rangeShift */
+ { d_end }
+};
+typedef struct kern_f0_pair_Tag kern_f0_pair;
+struct kern_f0_pair_Tag {
+ unsigned left;
+ unsigned right;
+ int value;
+};
+sfnt_decode kern_f0_pair_decode[] = {
+ { d_uint16, offsetof(kern_f0_pair, left) },
+ { d_uint16, offsetof(kern_f0_pair, right) },
+ { d_int16, offsetof(kern_f0_pair, value) },
+ { d_end }
+};
+
/* Naming ('name') table */
typedef struct t_name_Tag t_name;
typedef struct namerecord_Tag namerecord;
unsigned short index;
} glyphmap;
-typedef struct sfnt_Tag sfnt;
struct sfnt_Tag {
void *data;
size_t len;
void *end;
+ filepos pos;
offsubdir osd;
tabledir *td;
t_head head;
char *psname;
namerecord *nr;
- if (!sfnt_findtable(sf, TAG_name, &ptr, &end))
- abort();
+ if (!sfnt_findtable(sf, TAG_name, &ptr, &end)) {
+ error(err_sfntnotable, &sf->pos, "name");
+ return NULL;
+ }
ptr = decode(t_name_decode, ptr, end, &name);
name.nameRecord = snewn(name.count, namerecord);
ptr = decoden(namerecord_decode, ptr, sf->end, name.nameRecord,
}
}
}
+ error(err_sfntnopsname, &sf->pos);
return NULL;
}
unsigned nextras, i, g;
sf->glyphsbyname = sf->glyphsbyindex = NULL;
- if (!sfnt_findtable(sf, TAG_post, &ptr, &end))
- abort();
+ if (!sfnt_findtable(sf, TAG_post, &ptr, &end)) {
+ error(err_sfntnotable, &sf->pos, "post");
+ return;
+ }
ptr = decode(t_post_decode, ptr, end, &post);
+ if (ptr == NULL) {
+ error(err_sfntbadtable, &sf->pos, "post");
+ return;
+ }
sf->minmem = post.minMemType42;
sf->maxmem = post.maxMemType42;
fi->italicangle = post.italicAngle / 65536.0;
- if (ptr == NULL) abort();
switch (post.format) {
case 0x00010000:
sf->nglyphs = 258;
sfree(extraglyphs);
break;
default:
- abort();
+ error(err_sfnttablevers, &sf->pos, "post");
+ return;
}
/* Construct glyphsbyname */
sf->glyphsbyname = snewn(sf->nglyphs, unsigned short);
glyphsbyname_cmp);
}
-static glyph sfnt_indextoglyph(sfnt *sf, unsigned short idx) {
+glyph sfnt_indextoglyph(sfnt *sf, unsigned idx) {
return sf->glyphsbyindex[idx];
}
-static unsigned short sfnt_glyphtoindex(sfnt *sf, glyph g) {
+unsigned sfnt_nglyphs(sfnt *sf) {
+ return sf->nglyphs;
+}
+
+unsigned sfnt_glyphtoindex(sfnt *sf, glyph g) {
cmp_glyphsbyindex = sf->glyphsbyindex;
return *(unsigned short *)bsearch(&g, sf->glyphsbyname, sf->nglyphs,
sizeof(*sf->glyphsbyname),
fi->fontbbox[1] = sf->head.yMin * FUNITS_PER_PT / sf->head.unitsPerEm;
fi->fontbbox[2] = sf->head.xMax * FUNITS_PER_PT / sf->head.unitsPerEm;
fi->fontbbox[3] = sf->head.yMax * FUNITS_PER_PT / sf->head.unitsPerEm;
- if (!sfnt_findtable(sf, TAG_hhea, &ptr, &end))
- abort();
- if (decode(t_hhea_decode, ptr, end, &hhea) == NULL)
- abort();
- if ((hhea.version & 0xffff0000) != 0x00010000)
- abort();
+ if (!sfnt_findtable(sf, TAG_hhea, &ptr, &end)) {
+ error(err_sfntnotable, &sf->pos, "hhea");
+ return;
+ }
+ if (decode(t_hhea_decode, ptr, end, &hhea) == NULL) {
+ error(err_sfntbadtable, &sf->pos, "hhea");
+ return;
+ }
+ if ((hhea.version & 0xffff0000) != 0x00010000) {
+ error(err_sfnttablevers, &sf->pos, "hhea");
+ return;
+ }
fi->ascent = hhea.ascent;
fi->descent = hhea.descent;
- if (hhea.metricDataFormat != 0)
- abort();
- if (!sfnt_findtable(sf, TAG_hmtx, &ptr, &end))
- abort();
+ if (hhea.metricDataFormat != 0) {
+ error(err_sfnttablevers, &sf->pos, "hmtx");
+ return;
+ }
+ if (!sfnt_findtable(sf, TAG_hmtx, &ptr, &end)) {
+ error(err_sfntnotable, &sf->pos, "hmtx");
+ return;
+ }
hmtx = snewn(hhea.numOfLongHorMetrics, unsigned);
if (decoden(longhormetric_decode, ptr, end, hmtx, sizeof(*hmtx),
- hhea.numOfLongHorMetrics) == NULL)
- abort();
+ hhea.numOfLongHorMetrics) == NULL) {
+ error(err_sfntbadtable, &sf->pos, "hmtx");
+ return;
+ }
for (i = 0; i < sf->nglyphs; i++) {
glyph_width *w = snew(glyph_width);
w->glyph = sfnt_indextoglyph(sf, i);
if (!sfnt_findtable(sf, TAG_OS_2, &ptr, &end))
return;
if (decode(uint16_decode, ptr, end, &OS_2.version) == NULL)
- return;
+ goto bados2;
if (OS_2.version >= 2) {
if (decode(t_OS_2_v2_decode, ptr, end, &OS_2) == NULL)
- return;
+ goto bados2;
fi->xheight = OS_2.sxHeight * FUNITS_PER_PT / sf->head.unitsPerEm;
fi->capheight = OS_2.sCapHeight * FUNITS_PER_PT / sf->head.unitsPerEm;
} else if (OS_2.version == 1) {
if (decode(t_OS_2_v1_decode, ptr, end, &OS_2) == NULL)
- return;
+ goto bados2;
} else
return;
fi->ascent = OS_2.sTypoAscender * FUNITS_PER_PT / sf->head.unitsPerEm;
fi->descent = OS_2.sTypoDescender * FUNITS_PER_PT / sf->head.unitsPerEm;
+ return;
+ bados2:
+ error(err_sfntbadtable, &sf->pos, "OS/2");
+}
+
+/*
+ * Get kerning data from a 'kern' table
+ *
+ * 'kern' tables have two gratuitously different header formats, one
+ * used by Apple and one by Microsoft. Happily, the kerning tables
+ * themselves use the same formats. Halibut only supports simple kern
+ * pairs for horizontal kerning of horizontal text, and ignores
+ * everything else.
+ */
+static void sfnt_getkern(font_info *fi) {
+ sfnt *sf = fi->fontfile;
+ t_kern kern;
+ unsigned version, i, j;
+ void *ptr, *end;
+
+ if (!sfnt_findtable(sf, TAG_kern, &ptr, &end))
+ return;
+ if (!decode(uint16_decode, ptr, end, &version))
+ goto bad;
+ if (version == 0)
+ ptr = decode(t_kern_v0_decode, ptr, end, &kern);
+ else if (version == 1)
+ ptr = decode(t_kern_v1_decode, ptr, end, &kern);
+ else return;
+ if (ptr == NULL) goto bad;
+ for (i = 0; i < kern.nTables; i++) {
+ kern_f0 f0;
+ kern_pair *kerns;
+ if (version == 0) {
+ kern_v0_subhdr sub;
+ ptr = decode(kern_v0_subhdr_decode, ptr, end, &sub);
+ if (ptr == NULL) goto bad;
+ if (sub.version != 0 ||
+ (sub.coverage & (KERN_V0_HORIZ | KERN_V0_MINIMUM |
+ KERN_V0_CROSSSTREAM | KERN_V0_FORMAT)) !=
+ (KERN_V0_HORIZ | KERN_V0_FORMAT_0)) {
+ ptr = (char *)ptr + sub.length - 6;
+ continue;
+ }
+ } else {
+ kern_v1_subhdr sub;
+ ptr = decode(kern_v1_subhdr_decode, ptr, end, &sub);
+ if (ptr == NULL) goto bad;
+ if ((sub.coverage & (KERN_V1_VERTICAL | KERN_V1_CROSSSTREAM |
+ KERN_V1_VARIATION | KERN_V1_FORMAT)) !=
+ KERN_V0_FORMAT_0) {
+ ptr = (char *)ptr + sub.length - 8;
+ continue;
+ }
+ }
+ ptr = decode(kern_f0_decode, ptr, end, &f0);
+ if (ptr == NULL) goto bad;
+ kerns = snewn(f0.nPairs, kern_pair);
+ for (j = 0; j < f0.nPairs; j++) {
+ kern_f0_pair p;
+ kern_pair *kp = kerns + j;
+ ptr = decode(kern_f0_pair_decode, ptr, end, &p);
+ if (ptr == NULL) goto bad;
+ if (p.left >= sf->nglyphs || p.right >= sf->nglyphs) goto bad;
+ kp->left = sfnt_indextoglyph(sf, p.left);
+ kp->right = sfnt_indextoglyph(sf, p.right);
+ kp->kern = p.value * UNITS_PER_PT / (int)sf->head.unitsPerEm;
+ add234(fi->kerns, kp);
+ }
+ }
+ return;
+ bad:
+ error(err_sfntbadtable, &sf->pos, "kern");
+ return;
}
/*
for (i = 0; i < lenof(fi->bmp); i++)
fi->bmp[i] = 0xFFFF;
- if (!sfnt_findtable(sf, TAG_cmap, &ptr, &end))
- abort();
+ if (!sfnt_findtable(sf, TAG_cmap, &ptr, &end)) {
+ error(err_sfntnotable, &sf->pos, "cmap");
+ }
base = ptr;
ptr = decode(t_cmap_decode, ptr, end, &cmap);
- if (ptr == NULL) abort();
+ if (ptr == NULL) goto bad;
esd = snewn(cmap.numTables, encodingrec);
ptr = decoden(encodingrec_decode, ptr, end, esd, sizeof(*esd),
cmap.numTables);
- if (ptr == NULL) abort();
+ if (ptr == NULL) goto bad;
for (i = 0; i < cmap.numTables; i++) {
if (!decode(uint16_decode, (char *)base + esd[i].offset, end, &format))
- abort();
+ goto bad;
if ((esd[i].platformID == 0 && esd[i].encodingID == 3) ||
(esd[i].platformID == 3 && esd[i].encodingID == 1)) {
/* UCS-2 encoding */
if (!decode(uint16_decode, (char *)base + esd[i].offset, end,
&format))
- abort();
+ goto bad;
if (format == 4) {
unsigned *data, *endCode, *startCode, *idDelta, *idRangeOffset;
unsigned *glyphIndexArray;
ptr = decode(cmap4_decode, (char *)base + esd[i].offset, end,
&cmap4);
- if (!ptr) abort();
+ if (!ptr) goto bad;
segcount = cmap4.segCountX2 / 2;
nword = cmap4.length / 2 - 7;
data = snewn(nword, unsigned);
if (!decoden(uint16_decode, ptr, (char *)ptr + nword * 2,
- data, sizeof(*data), nword)) abort();
+ data, sizeof(*data), nword)) goto bad;
endCode = data;
startCode = data + segcount + 1;
idDelta = startCode + segcount;
for (k = startCode[j]; k <= endCode[j]; k++) {
idx = (k + idDelta[j]) & 0xffff;
if (idx != 0) {
- if (idx > sf->nglyphs) abort();
+ if (idx > sf->nglyphs) goto bad;
fi->bmp[k] = sfnt_indextoglyph(sf, idx);
}
}
idx = glyphIndexArray[startidx + k - startCode[j]];
if (idx != 0) {
idx = (idx + idDelta[j]) & 0xffff;
- if (idx > sf->nglyphs) abort();
+ if (idx > sf->nglyphs) goto bad;
fi->bmp[k] = sfnt_indextoglyph(sf, idx);
}
}
}
}
-
sfree(data);
+ return;
}
}
}
+ error(err_sfntnounicmap, &sf->pos);
+ return;
+ bad:
+ error(err_sfntbadtable, &sf->pos, "cmap");
}
void read_sfnt_file(input *in) {
size_t off = 0, got;
FILE *fp = in->currfp;
font_info *fi = snew(font_info);
-/* size_t i; */
void *ptr, *end;
fi->name = NULL;
sf->len *= 2;
sf->data = sresize(sf->data, sf->len, unsigned char);
}
+ fclose(in->currfp);
sf->len = off;
sf->data = sresize(sf->data, sf->len, unsigned char);
sf->end = (char *)sf->data + sf->len;
- decode(offsubdir_decode, sf->data, sf->end, &sf->osd);
-/*
- fprintf(stderr, "scaler type = 0x%x; numTables = %u\n",
- sf->osd.scaler_type, sf->osd.numTables);
-*/
+ sf->pos = in->pos;
+ sf->pos.line = 0;
+ sf->nglyphs = 0;
+ ptr = decode(offsubdir_decode, sf->data, sf->end, &sf->osd);
+ if (ptr == NULL) {
+ error(err_sfntbadhdr, &sf->pos);
+ return;
+ }
sf->td = snewn(sf->osd.numTables, tabledir);
- decoden(tabledir_decode, (char *)sf->data + 12, sf->end,
- sf->td, sizeof(*sf->td), sf->osd.numTables);
-/*
- for (i = 0; i < sf->osd.numTables; i++)
- fprintf(stderr, "table tag = '%c%c%c%c'; offset = %#10x; length = %#10x\n",
- sf->td[i].tag >> 24, sf->td[i].tag >> 16, sf->td[i].tag >> 8, sf->td[i].tag, sf->td[i].offset, sf->td[i].length);
-*/
- if (!sfnt_findtable(sf, TAG_head, &ptr, &end))
- abort();
- if (decode(t_head_decode, ptr, end, &sf->head) == NULL)
- abort();
- if ((sf->head.version & 0xffff0000) != 0x00010000)
- abort();
+ ptr = decoden(tabledir_decode, ptr, sf->end, sf->td, sizeof(*sf->td),
+ sf->osd.numTables);
+ if (ptr == NULL) {
+ error(err_sfntbadhdr, &sf->pos);
+ return;
+ }
+ if (!sfnt_findtable(sf, TAG_head, &ptr, &end)) {
+ error(err_sfntnotable, &sf->pos, "head");
+ return;
+ }
+ if (decode(t_head_decode, ptr, end, &sf->head) == NULL) {
+ error(err_sfntbadtable, &sf->pos, "head");
+ return;
+ }
+ if ((sf->head.version & 0xffff0000) != 0x00010000) {
+ error(err_sfnttablevers, &sf->pos, "head");
+ return;
+ }
fi->name = sfnt_psname(fi);
+ if (fi->name == NULL) return;
sfnt_mapglyphs(fi);
sfnt_getmetrics(fi);
+ sfnt_getkern(fi);
sfnt_getmap(fi);
fi->next = all_fonts;
all_fonts = fi;
- fclose(in->currfp);
}
static int sizecmp(const void *a, const void *b) {
for (i = 0; i < sf->osd.numTables; i++) {
breaks[i] = sf->td[i].offset;
}
- if (!sfnt_findtable(sf, TAG_glyf, &glyfptr, &glyfend))
- abort();
+ if (!sfnt_findtable(sf, TAG_glyf, &glyfptr, &glyfend)) {
+ error(err_sfntnotable, &sf->pos, "glyf");
+ return;
+ }
glyfoff = (char *)glyfptr - (char *)sf->data;
glyflen = (char *)glyfend - (char *)glyfptr;
- if (!sfnt_findtable(sf, TAG_loca, &locaptr, &locaend))
- abort();
+ if (!sfnt_findtable(sf, TAG_loca, &locaptr, &locaend)) {
+ error(err_sfntnotable, &sf->pos, "loca");
+ return;
+ }
loca = snewn(sf->nglyphs, unsigned);
if (sf->head.indexToLocFormat == 0) {
if (!decoden(uint16_decode, locaptr, locaend, loca, sizeof(*loca),
- sf->nglyphs)) abort();
+ sf->nglyphs)) goto badloca;
for (i = 0; i < sf->nglyphs; i++) loca[i] *= 2;
} else {
if (!decoden(uint32_decode, locaptr, locaend, loca, sizeof(*loca),
- sf->nglyphs)) abort();
+ sf->nglyphs)) goto badloca;
}
for (i = 1; i < sf->nglyphs; i++) {
- if (loca[i] > glyflen) abort();
+ if (loca[i] > glyflen) goto badloca;
breaks[sf->osd.numTables + i - 1] = loca[i] + glyfoff;
}
breaks[sf->osd.numTables + sf->nglyphs - 1] = sf->len;
fprintf(ofp, "00>] readonly def\n");
sfree(breaks);
fprintf(ofp, "end /%s exch definefont\n", fi->name);
-}
-
-void sfnt_cmap(font_encoding *fe, object *cmap) {
- unsigned i;
-
- objtext(cmap, "<</Type/CMap\n/CMapName/");
- objtext(cmap, fe->name);
- objtext(cmap, "\n/CIDSystemInfo<</Registry(Adobe)/Ordering(Identity)"
- "/Supplement 0>>\n");
- objstream(cmap, "%!PS-Adobe-3.0 Resource-CMap\n"
- "%%DocumentNeededResources: procset CIDInit\n"
- "%%IncludeResource: procset CIDInit\n"
- "%%BeginResource: CMap ");
- objstream(cmap, fe->name);
- objstream(cmap, "\n%%Title (");
- objstream(cmap, fe->name);
- objstream(cmap, " Adobe Identity 0)\n%%Version: 1\n%%EndComments\n");
- objstream(cmap, "/CIDInit/ProcSet findresource begin\n");
- objstream(cmap, "12 dict begin begincmap\n");
- objstream(cmap, "/CIDSystemInfo 3 dict dup begin\n"
- "/Registry(Adobe)def/Ordering(Identity)def/Supplement 0 def "
- "end def\n");
- objstream(cmap, "/CMapName/");
- objstream(cmap, fe->name);
- objstream(cmap, " def/CMapType 0 def/WMode 0 def\n");
- objstream(cmap, "1 begincodespacerange<00><FF>endcodespacerange\n");
- for (i = 0; i < 256; i++) {
- char buf[20];
- if (fe->vector[i] == NOGLYPH)
- continue;
- objstream(cmap, "1 begincidchar");
- sprintf(buf, "<%02X>", i);
- objstream(cmap, buf);
- sprintf(buf, "%hu", sfnt_glyphtoindex(fe->font->info->fontfile,
- fe->vector[i]));
- objstream(cmap, buf);
- objstream(cmap, " endcidchar\n");
- }
- objstream(cmap, "endcmap CMapName currentdict /CMap defineresource pop "
- "end end\n%%EndResource\n%%EOF\n");
+ return;
+ badloca:
+ error(err_sfntbadtable, &sf->pos, "loca");
}
void sfnt_data(font_info *fi, char **bufp, size_t *lenp) {
~mdw / sgt / halibut / blobdiff