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freetype2
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Code Issues 4 Releases Wiki Activity

changed the SFNT format check to make it less strict. 

A certain number of TrueType fonts have invalid values
in the SFNT header..
This commit is contained in:
David Turner 2000-06-01 03:26:58 +00:00
parent b916b1e53f
commit 3581d06464
1 changed files with 11 additions and 9 deletions
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20
src/sfnt/ttload.c
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@ -165,7 +165,7 @@
FT_FRAME_END };
FT_TRACE2(( "TT_Load_SFNT_Header(%08p, %ld )\n",
face, faceIndex ));
face, face_index ));
face->ttc_header.Tag = 0;
face->ttc_header.version = 0;
@ -224,13 +224,15 @@
/* now, check the values of "num_tables", "seach_range", etc.. */
{
TT_UInt num_tables = sfnt->num_tables;
TT_UInt search_range = sfnt->search_range;
TT_ULong entry_selector = 1L << sfnt->entry_selector;
if ( entry_selector > num_tables || entry_selector*2 <= num_tables ||
search_range != 16*entry_selector ||
num_tables*16 != search_range + sfnt->range_shift )
{
/* IMPORTANT: Many fonts have an incorrect "search_range" value, so */
/* we only check the "entry_selector" correctness here.. */
/* */
if ( num_tables == 0 ||
entry_selector > num_tables ||
entry_selector*2 <= num_tables )
{
FT_TRACE2(( "TT_Load_SFNT_Header: file is not SFNT !\n" ));
error = FT_Err_Unknown_File_Format;
}
@ -271,8 +273,8 @@
TT_Table *entry, *limit;
FT_TRACE2(( "TT_Load_Directory( %08p, %ld )\n",
face, faceIndex ));
FT_TRACE2(( "TT_Load_Directory( %08p )\n",
face ));
FT_TRACE2(( "-- Tables count : %12u\n", sfnt->num_tables ));
FT_TRACE2(( "-- Format version : %08lx\n", sfnt->format_tag ));