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diff --git a/src/fcfreetype.c b/src/fcfreetype.c
index 8a037c0..5e8990d 100644
--- a/src/fcfreetype.c
+++ b/src/fcfreetype.c
@@ -1104,7 +1104,10 @@ FcFreeTypeQueryFace (const FT_Face face,
char psname[256];
const char *tmp;
- FcChar8 *hashstr;
+ FcChar8 *hashstr = NULL;
+ char *fontdata = NULL;
+ FT_Error err;
+ FT_ULong len = 0, alen;
pat = FcPatternCreate ();
if (!pat)
@@ -1662,12 +1665,34 @@ FcFreeTypeQueryFace (const FT_Face face,
if (!FcPatternAddBool (pat, FC_DECORATIVE, decorative))
goto bail1;
- hashstr = FcHashGetSHA256DigestFromFile (file);
+ err = FT_Load_Sfnt_Table (face, 0, 0, NULL, &len);
+ if (err == FT_Err_Ok)
+ {
+ alen = (len + 63) & ~63;
+ fontdata = malloc (alen);
+ if (!fontdata)
+ goto bail1;
+ err = FT_Load_Sfnt_Table (face, 0, 0, (FT_Byte *)fontdata, &len);
+ if (err != FT_Err_Ok)
+ goto bail1;
+ memset (&fontdata[len], 0, alen - len);
+ hashstr = FcHashGetSHA256DigestFromMemory (fontdata, len);
+ }
+ else if (err == FT_Err_Invalid_Face_Handle)
+ {
+ /* font may not support SFNT. falling back to
+ * read the font data from file directly
+ */
+ hashstr = FcHashGetSHA256DigestFromFile (file);
+ }
+ else
+ {
+ goto bail1;
+ }
if (!hashstr)
goto bail1;
if (!FcPatternAddString (pat, FC_HASH, hashstr))
goto bail1;
- free (hashstr);
/*
* Compute the unicode coverage for the font
@@ -1756,6 +1781,10 @@ FcFreeTypeQueryFace (const FT_Face face,
bail2:
FcCharSetDestroy (cs);
bail1:
+ if (hashstr)
+ free (hashstr);
+ if (fontdata)
+ free (fontdata);
FcPatternDestroy (pat);
bail0:
return NULL;
diff --git a/src/fchash.c b/src/fchash.c
index 827b20f..92585a6 100644
--- a/src/fchash.c
+++ b/src/fchash.c
@@ -220,7 +220,7 @@ FcHashGetSHA256DigestFromFile (const FcChar8 *filename)
ret = FcHashInitSHA256Digest ();
if (!ret)
- return NULL;
+ goto bail0;
while (!feof (fp))
{
@@ -261,5 +261,60 @@ FcHashGetSHA256DigestFromFile (const FcChar8 *filename)
bail0:
fclose (fp);
+
return NULL;
}
+
+FcChar8 *
+FcHashGetSHA256DigestFromMemory (const char *fontdata,
+ size_t length)
+{
+ char ibuf[64];
+ FcChar32 *ret;
+ size_t i = 0;
+
+ ret = FcHashInitSHA256Digest ();
+ if (!ret)
+ return NULL;
+
+ while (i <= length)
+ {
+ if ((length - i) < 64)
+ {
+ long v;
+ size_t n;
+
+ /* add a padding */
+ n = length - i;
+ if (n > 0)
+ memcpy (ibuf, &fontdata[i], n);
+ memset (&ibuf[n], 0, 64 - n);
+ ibuf[n] = 0x80;
+ if ((64 - n) < 9)
+ {
+ /* process a block once */
+ FcHashComputeSHA256Digest (ret, ibuf);
+ memset (ibuf, 0, 64);
+ }
+ /* set input size at the end */
+ v = length * 8;
+ ibuf[63 - 0] = v & 0xff;
+ ibuf[63 - 1] = (v >> 8) & 0xff;
+ ibuf[63 - 2] = (v >> 16) & 0xff;
+ ibuf[63 - 3] = (v >> 24) & 0xff;
+ ibuf[63 - 4] = (v >> 32) & 0xff;
+ ibuf[63 - 5] = (v >> 40) & 0xff;
+ ibuf[63 - 6] = (v >> 48) & 0xff;
+ ibuf[63 - 7] = (v >> 56) & 0xff;
+ FcHashComputeSHA256Digest (ret, ibuf);
+ break;
+ }
+ else
+ {
+ FcHashComputeSHA256Digest (ret, &fontdata[i]);
+ }
+ i += 64;
+ }
+
+ return FcHashSHA256ToString (ret);
+}
diff --git a/src/fcint.h b/src/fcint.h
index c45075e..8919958 100644
--- a/src/fcint.h
+++ b/src/fcint.h
@@ -818,9 +818,14 @@ FcFontSetSerialize (FcSerialize *serialize, const FcFontSet * s);
FcPrivate FcChar8 *
FcHashGetSHA256Digest (const FcChar8 *input_strings,
size_t len);
+
FcPrivate FcChar8 *
FcHashGetSHA256DigestFromFile (const FcChar8 *filename);
+FcPrivate FcChar8 *
+FcHashGetSHA256DigestFromMemory (const char *fontdata,
+ size_t length);
+
/* fcinit.c */
FcPrivate FcConfig *
FcInitLoadOwnConfig (FcConfig *config);
|
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