#define TAG_hmtx 0x686d7478
#define TAG_kern 0x6b65726e
#define TAG_loca 0x6c6f6361
+#define TAG_maxp 0x6d617870
#define TAG_name 0x6e616d65
#define TAG_post 0x706f7374
#define sfnt_true 0x74727565
{ d_end }
};
+/* Maximum profile ('maxp') table */
+typedef struct t_maxp_Tag t_maxp;
+struct t_maxp_Tag {
+ unsigned version;
+ unsigned numGlyphs;
+};
+sfnt_decode t_maxp_decode[] = {
+ { d_uint32, offsetof(t_maxp, version) },
+ { d_uint16, offsetof(t_maxp, numGlyphs) },
+ { d_end }
+};
+
/* Naming ('name') table */
typedef struct t_name_Tag t_name;
typedef struct namerecord_Tag namerecord;
glyph gb = cmp_glyphsbyindex[*(unsigned short *)b];
if (ga < gb) return -1;
if (ga > gb) return 1;
+ /* For de-duping, we'd prefer to have the first glyph stay first */
+ if (*(unsigned short *)a < *(unsigned short *)b) return -1;
+ if (*(unsigned short *)a > *(unsigned short *)b) return 1;
return 0;
}
static int glyphsbyname_cmp_search(void const *a, void const *b) {
return 0;
}
+/* Generate an name for a glyph that doesn't have one. */
+static glyph genglyph(unsigned idx) {
+ char buf[11];
+ if (idx == 0) return glyph_intern(".notdef");
+ sprintf(buf, "glyph%u", idx);
+ return glyph_intern(buf);
+}
+
/*
* Extract data from the 'post' table (mostly glyph mappings)
*
void *ptr, *end;
unsigned char *sptr;
char tmp[256];
- glyph *extraglyphs;
- unsigned nextras, i, g;
+ glyph *extraglyphs, prev, this;
+ unsigned nextras, i, g, suflen;
sf->glyphsbyname = sf->glyphsbyindex = NULL;
- 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;
- }
+ if (sfnt_findtable(sf, TAG_post, &ptr, &end)) {
+ ptr = decode(t_post_decode, ptr, end, &post);
+ if (ptr == NULL) {
+ error(err_sfntbadtable, &sf->pos, "post");
+ goto noglyphs;
+ }
- sf->minmem = post.minMemType42;
- sf->maxmem = post.maxMemType42;
- fi->italicangle = post.italicAngle / 65536.0;
- switch (post.format) {
- case 0x00010000:
- sf->nglyphs = 258;
- sf->glyphsbyindex = (glyph *)tt_std_glyphs;
- break;
- case 0x00020000:
- if ((char *)ptr + 2 > (char *)end) return;
- decode_uint16(ptr, &sf->nglyphs);
- ptr = (char *)ptr + 2;
- if ((char *)ptr + 2*sf->nglyphs > (char *)end) return;
- nextras = 0;
- for (sptr = (unsigned char *)ptr + 2*sf->nglyphs;
- sptr < (unsigned char *)end;
- sptr += *sptr+1)
- nextras++;
- extraglyphs = snewn(nextras, glyph);
- i = 0;
- for (sptr = (unsigned char *)ptr + 2*sf->nglyphs;
- sptr < (unsigned char *)end;
- sptr += *sptr+1) {
- memcpy(tmp, sptr + 1, *sptr);
- tmp[*sptr] = 0;
- assert(i < nextras);
- extraglyphs[i++] = glyph_intern(tmp);
+ sf->minmem = post.minMemType42;
+ sf->maxmem = post.maxMemType42;
+ fi->italicangle = post.italicAngle / 65536.0;
+ switch (post.format) {
+ case 0x00010000:
+ if (sf->nglyphs != 258) {
+ error(err_sfntbadtable, &sf->pos, "post");
+ break;
+ }
+ sf->glyphsbyindex = (glyph *)tt_std_glyphs;
+ break;
+ case 0x00020000:
+ if ((char *)ptr + 2 > (char *)end) {
+ error(err_sfntbadtable, &sf->pos, "post");
+ break;
+ }
+ ptr = (char *)ptr + 2;
+ if ((char *)ptr + 2*sf->nglyphs > (char *)end) {
+ error(err_sfntbadtable, &sf->pos, "post");
+ break;
+ }
+ nextras = 0;
+ for (sptr = (unsigned char *)ptr + 2*sf->nglyphs;
+ sptr < (unsigned char *)end;
+ sptr += *sptr+1)
+ nextras++;
+ extraglyphs = snewn(nextras, glyph);
+ i = 0;
+ for (sptr = (unsigned char *)ptr + 2*sf->nglyphs;
+ sptr < (unsigned char *)end;
+ sptr += *sptr+1) {
+ memcpy(tmp, sptr + 1, *sptr);
+ tmp[*sptr] = 0;
+ assert(i < nextras);
+ extraglyphs[i++] = glyph_intern(tmp);
+ }
+ sf->glyphsbyindex = snewn(sf->nglyphs, glyph);
+ for (i = 0; i < sf->nglyphs; i++) {
+ decode_uint16((char *)ptr + 2*i, &g);
+ if (g <= 257)
+ sf->glyphsbyindex[i] = tt_std_glyphs[g];
+ else if (g < 258 + nextras)
+ sf->glyphsbyindex[i] = extraglyphs[g - 258];
+ else {
+ error(err_sfntbadtable, &sf->pos, "post");
+ sf->glyphsbyindex[i] = genglyph(i);
+ }
+ }
+ sfree(extraglyphs);
+ break;
+ case 0x00030000:
+ break;
+ default:
+ error(err_sfnttablevers, &sf->pos, "post");
+ break;
}
+ }
+ noglyphs:
+ if (!sf->glyphsbyindex) {
sf->glyphsbyindex = snewn(sf->nglyphs, glyph);
- for (i = 0; i < sf->nglyphs; i++) {
- decode_uint16((char *)ptr + 2*i, &g);
- if (g <= 257)
- sf->glyphsbyindex[i] = tt_std_glyphs[g];
- else if (g < 258 + nextras)
- sf->glyphsbyindex[i] = extraglyphs[g - 258];
- else
- sf->glyphsbyindex[i] = NOGLYPH;
- }
- sfree(extraglyphs);
- break;
- default:
- error(err_sfnttablevers, &sf->pos, "post");
- return;
+ for (i = 0; i < sf->nglyphs; i++)
+ sf->glyphsbyindex[i] = genglyph(i);
}
/* Construct glyphsbyname */
sf->glyphsbyname = snewn(sf->nglyphs, unsigned short);
cmp_glyphsbyindex = sf->glyphsbyindex;
qsort(sf->glyphsbyname, sf->nglyphs, sizeof(*sf->glyphsbyname),
glyphsbyname_cmp);
+ /*
+ * It's possible for fonts to specify the same name for multiple
+ * glyphs, which would make one of them inaccessible. Check for
+ * that, and rename all but one of each set.
+ *
+ * To ensure that we don't clash with any existing glyph names,
+ * our renaming involves appending the glyph number formatted with
+ * enough leading zeroes to make it longer than any all-digit
+ * suffix that already exists in the font.
+ */
+ suflen = 4;
+ for (i = 0; i < sf->nglyphs; i++) {
+ char const *p;
+ p = strrchr(glyph_extern(sfnt_indextoglyph(sf, i)), '.');
+ if (p && !(p+1)[strspn(p+1, "0123456789")] && strlen(p+1) > suflen)
+ suflen = strlen(p+1);
+ }
+ suflen++;
+ prev = sfnt_indextoglyph(sf, sf->glyphsbyname[0]);
+ for (i = 1; i < sf->nglyphs; i++) {
+ if (prev == (this = sfnt_indextoglyph(sf, sf->glyphsbyname[i]))) {
+ char const *basename;
+ char *buf;
+ basename = glyph_extern(this);
+ buf = snewn(strlen(basename) + 2 + suflen, char);
+ strcpy(buf, basename);
+ sprintf(buf + strlen(basename), ".%0*hu", suflen,
+ sf->glyphsbyname[i]);
+ sf->glyphsbyindex[sf->glyphsbyname[i]] = glyph_intern(buf);
+ sfree(buf);
+ }
+ prev = this;
+ }
+ /* We may have renamed some glyphs, so re-sort the array. */
+ qsort(sf->glyphsbyname, sf->nglyphs, sizeof(*sf->glyphsbyname),
+ glyphsbyname_cmp);
}
glyph sfnt_indextoglyph(sfnt *sf, unsigned idx) {
/*
* Get mapping data from 'cmap' table
*
- * We look for either a (0, 3), or (3, 1) table, both of these being
- * versions of UCS-2. We only handle format 4 of this table, since
- * that seems to be the only one in use.
+ * We look for either a (0, 0), (0, 2), (0, 3), or (3, 1) table, all
+ * of these being versions of UCS-2. We ignore (0, 1), since it's
+ * Unicode 1.1 with precomposed Hangul syllables. We only handle
+ * format 4 of this table, since that seems to be the only one in use.
*/
void sfnt_getmap(font_info *fi) {
sfnt *sf = fi->fontfile;
for (i = 0; i < cmap.numTables; i++) {
if (!decode(uint16_decode, (char *)base + esd[i].offset, end, &format))
goto bad;
- if ((esd[i].platformID == 0 && esd[i].encodingID == 3) ||
+ if ((esd[i].platformID == 0 && esd[i].encodingID == 0) ||
+ (esd[i].platformID == 0 && esd[i].encodingID == 2) ||
+ (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,
for (k = startCode[j]; k <= endCode[j]; k++) {
idx = (k + idDelta[j]) & 0xffff;
if (idx != 0) {
- if (idx > sf->nglyphs) goto bad;
+ if (idx > sf->nglyphs) {
+ error(err_sfntbadglyph, &sf->pos, k);
+ continue;
+ }
fi->bmp[k] = sfnt_indextoglyph(sf, idx);
}
}
} else {
unsigned startidx = idRangeOffset[j]/2 - segcount + j;
for (k = startCode[j]; k <= endCode[j]; k++) {
+ if (startidx + k - startCode[j] >=
+ nglyphindex) {
+ error(err_sfntbadglyph, &sf->pos, k);
+ continue;
+ }
idx = glyphIndexArray[startidx + k - startCode[j]];
if (idx != 0) {
idx = (idx + idDelta[j]) & 0xffff;
- if (idx > sf->nglyphs) goto bad;
+ if (idx > sf->nglyphs) {
+ error(err_sfntbadglyph, &sf->pos, k);
+ continue;
+ }
fi->bmp[k] = sfnt_indextoglyph(sf, idx);
}
}
FILE *fp = in->currfp;
font_info *fi = snew(font_info);
void *ptr, *end;
+ t_maxp maxp;
fi->name = NULL;
fi->widths = newtree234(width_cmp);
error(err_sfnttablevers, &sf->pos, "head");
return;
}
+ if (!sfnt_findtable(sf, TAG_maxp, &ptr, &end)) {
+ error(err_sfntnotable, &sf->pos, "maxp");
+ return;
+ }
+ if (decode(t_maxp_decode, ptr, end, &maxp) == NULL) {
+ error(err_sfntbadtable, &sf->pos, "maxp");
+ return;
+ }
+ if (maxp.version < 0x00005000 || maxp.version > 0x0001ffff) {
+ error(err_sfnttablevers, &sf->pos, "maxp");
+ return;
+ }
+ sf->nglyphs = maxp.numGlyphs;
fi->name = sfnt_psname(fi);
if (fi->name == NULL) return;
sfnt_mapglyphs(fi);
~mdw / sgt / halibut / blobdiff