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fixing TrueType bytecode interpreter regression for HLB_____.TTF, needs more testing with other fonts

This commit is contained in:
David Turner 2007-03-17 17:48:57 +00:00
parent 34cd7ea03d
commit 89020d9749
2 changed files with 27 additions and 16 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2007-03-17 David Turner <david@freetype.org>
* src/truetype/ttinterp.c (Ins_IP): fixing wrong handling
of the (undocumented) twilight zone special case.
2007-03-09 Werner Lemberg <wl@gnu.org> 2007-03-09 Werner Lemberg <wl@gnu.org>
* Version 2.3.2 released. * Version 2.3.2 released.

26
src/truetype/ttinterp.c
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@ -6173,6 +6173,7 @@
FT_F26Dot6 old_range, cur_range; FT_F26Dot6 old_range, cur_range;
FT_Vector* orus_base; FT_Vector* orus_base;
FT_Vector* cur_base; FT_Vector* cur_base;
FT_Int twilight;
FT_UNUSED_ARG; FT_UNUSED_ARG;
@ -6184,20 +6185,17 @@
} }
/* /*
* We need to deal in a special way with the twilight zone. The easiest * We need to deal in a special way with the twilight zone.
* solution is simply to copy the coordinates from `org' to `orus'
* whenever a font tries to perform intersections based on some of its
* points.
*
* Otherwise, by definition, the value of CUR.twilight.orus[n] is (0,0), * Otherwise, by definition, the value of CUR.twilight.orus[n] is (0,0),
* whatever value of `n'. * for every n.
*/ */
if ( CUR.GS.gep0 == 0 || CUR.GS.gep1 == 0 || CUR.GS.gep2 == 0 ) twilight = ( CUR.GS.gep0 == 0 || CUR.GS.gep1 == 0 || CUR.GS.gep2 == 0 );
FT_ARRAY_COPY( CUR.twilight.orus,
CUR.twilight.org,
CUR.twilight.n_points );
if (twilight)
orus_base = &CUR.zp0.org[CUR.GS.rp1];
else
orus_base = &CUR.zp0.orus[CUR.GS.rp1]; orus_base = &CUR.zp0.orus[CUR.GS.rp1];
cur_base = &CUR.zp0.cur[CUR.GS.rp1]; cur_base = &CUR.zp0.cur[CUR.GS.rp1];
/* XXX: There are some glyphs in some braindead but popular */ /* XXX: There are some glyphs in some braindead but popular */
@ -6212,7 +6210,11 @@
} }
else else
{ {
if (twilight)
old_range = CUR_Func_dualproj( &CUR.zp1.org[CUR.GS.rp2], orus_base );
else
old_range = CUR_Func_dualproj( &CUR.zp1.orus[CUR.GS.rp2], orus_base ); old_range = CUR_Func_dualproj( &CUR.zp1.orus[CUR.GS.rp2], orus_base );
cur_range = CUR_Func_project ( &CUR.zp1.cur[CUR.GS.rp2], cur_base ); cur_range = CUR_Func_project ( &CUR.zp1.cur[CUR.GS.rp2], cur_base );
} }
@ -6233,7 +6235,11 @@
continue; continue;
} }
if (twilight)
org_dist = CUR_Func_dualproj( &CUR.zp2.org[point], orus_base );
else
org_dist = CUR_Func_dualproj( &CUR.zp2.orus[point], orus_base ); org_dist = CUR_Func_dualproj( &CUR.zp2.orus[point], orus_base );
cur_dist = CUR_Func_project ( &CUR.zp2.cur[point], cur_base ); cur_dist = CUR_Func_project ( &CUR.zp2.cur[point], cur_base );
new_dist = (old_range != 0) new_dist = (old_range != 0)
? TT_MULDIV( org_dist, cur_range, old_range ) ? TT_MULDIV( org_dist, cur_range, old_range )