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