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[truetype] Add checksums for 2 tricky fonts. 

Thanks to Ting717 for providing sample PDF. Fixes #1087.

* src/truetype/ttobjs.c (tt_check_trickyness_sfnt_ids): Add
checksums for 2 tricky fonts `DFHei-Bd-WIN-HK-BF' and
`DFMing-Md-WIN-HK-BF'.
This commit is contained in:
suzuki toshiya 2021-08-24 10:25:22 +09:00
parent 78f2bd0bd3
commit 1c23982dd2
1 changed files with 19 additions and 1 deletions
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20
src/truetype/ttobjs.c
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@ -277,7 +277,7 @@
tt_check_trickyness_sfnt_ids( TT_Face face )
{
#define TRICK_SFNT_IDS_PER_FACE 3
#define TRICK_SFNT_IDS_NUM_FACES 29
#define TRICK_SFNT_IDS_NUM_FACES 31
static const tt_sfnt_id_rec sfnt_id[TRICK_SFNT_IDS_NUM_FACES]
[TRICK_SFNT_IDS_PER_FACE] = {
@ -430,6 +430,16 @@
{ 0x00170003UL, 0x00000060UL }, /* cvt */
{ 0xDBB4306EUL, 0x000058AAUL }, /* fpgm */
{ 0xD643482AUL, 0x00000035UL } /* prep */
},
{ /* DFHei-Bd-WIN-HK-BF, issue #1087 */
{ 0x1269EB58UL, 0x00000350UL }, /* cvt */
{ 0x5CD5957AUL, 0x00006A4EUL }, /* fpgm */
{ 0xF758323AUL, 0x00000380UL } /* prep */
},
{ /* DFMing-Md-WIN-HK-BF, issue #1087 */
{ 0x122FEB0BUL, 0x00000350UL }, /* cvt */
{ 0x7F10919AUL, 0x000070A9UL }, /* fpgm */
{ 0x7CD7E7B7UL, 0x0000025CUL } /* prep */
}
};
@ -510,13 +520,21 @@
/* For first, check the face name for quick check. */
if ( face->family_name &&
tt_check_trickyness_family( face->family_name ) )
{
FT_TRACE3(( "found as a tricky font by "
"its family name: %s\n", face->family_name ));
return TRUE;
}
/* Type42 fonts may lack `name' tables, we thus try to identify */
/* tricky fonts by checking the checksums of Type42-persistent */
/* sfnt tables (`cvt', `fpgm', and `prep'). */
if ( tt_check_trickyness_sfnt_ids( (TT_Face)face ) )
{
FT_TRACE3(( "found as a tricky font by "
"its cvt/fpgm/prep table checksum\n" ));
return TRUE;
}
return FALSE;
}