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the SFNT Kerning table loader now ensures that the table is correctly 

sorted.
This commit is contained in:
David Turner 2001-06-27 12:40:46 +00:00
parent 37fb4854bb
commit d0f20a15f5
2 changed files with 46 additions and 0 deletions
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4
ChangeLog
View File

@ -1,5 +1,9 @@
2001-06-27 David Turner <david@freetype.org>
* src/sfnt/ttload.c (TT_Load_Kern): the kern table loader now ensures
that the kerning table is correctly sorted (some problem fonts don't
have a correct kern table !!)
* builds/unix/ftconfig.in: changed the definition of the
FT_CALLBACK_DEF macro

42
src/sfnt/ttload.c
View File

@ -26,6 +26,7 @@
#include "sferrors.h"
#include <stdlib.h> /* for qsort */
/*************************************************************************/
/* */
@ -1537,6 +1538,10 @@
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_CALLBACK_DEF(int)
tt_kern_pair_compare( const void* a, const void* b );
FT_LOCAL_DEF
FT_Error TT_Load_Kern( TT_Face face,
FT_Stream stream )
@ -1610,6 +1615,26 @@
face->num_kern_pairs = num_pairs;
face->kern_table_index = n;
/* ensure that the kerning pair table is sorted (yes, some */
/* fonts have unsorted tables !!) */
{
FT_UInt i;
TT_Kern_0_Pair* pair;
pair = face->kern_pairs;
for ( i=1; i < num_pairs; i++, pair++ )
{
if ( tt_kern_pair_compare( pair, pair+1 ) != -1 )
{
qsort( (void*)face->kern_pairs, (int)num_pairs,
sizeof(TT_Kern_0_Pair), tt_kern_pair_compare );
break;
}
}
}
goto Exit;
}
@ -1626,6 +1651,23 @@
return error;
}
#undef TT_KERN_INDEX
#define TT_KERN_INDEX(g1,g2) (((FT_ULong)g1 << 16) | g2)
FT_CALLBACK_DEF(int)
tt_kern_pair_compare( const void* a, const void* b )
{
TT_Kern_0_Pair* pair1 = (TT_Kern_0_Pair*)a;
TT_Kern_0_Pair* pair2 = (TT_Kern_0_Pair*)b;
FT_ULong index1 = TT_KERN_INDEX( pair1->left, pair1->right );
FT_ULong index2 = TT_KERN_INDEX( pair2->left, pair2->right );
return ( index1 < index2 ? -1 :
( index1 > index2 ? 1 : 0 ));
}
#undef TT_KERN_INDEX
/*************************************************************************/
/* */