diff options
Diffstat (limited to 'src/sfnt/sfwoff2.c')
| -rw-r--r-- | src/sfnt/sfwoff2.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/src/sfnt/sfwoff2.c b/src/sfnt/sfwoff2.c index a599ae505..6e2ff040f 100644 --- a/src/sfnt/sfwoff2.c +++ b/src/sfnt/sfwoff2.c @@ -2092,7 +2092,22 @@ /* This is what we normally expect. */ /* Initially trust `totalSfntSize' and change later as required. */ if ( woff2.totalSfntSize > sfnt_size ) - sfnt_size = woff2.totalSfntSize; + { + /* However, adjust the value to something reasonable. */ + + /* Factor 64 is heuristic. */ + if ( ( woff2.totalSfntSize >> 6 ) > sfnt_size ) + sfnt_size <<= 6; + else + sfnt_size = woff2.totalSfntSize; + + /* Value 1<<26 = 67108864 is heuristic. */ + if (sfnt_size >= (1 << 26)) + sfnt_size = 1 << 26; + + FT_TRACE4(( "adjusting estimate of uncompressed font size to %lu\n", + sfnt_size )); + } /* Write sfnt header. */ if ( FT_ALLOC( sfnt, sfnt_size ) || |