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[truetype] Fix handling of non-intermediate GX tuples. 

We probably did not notice this as all fonts we tested had only
tuple_coords[i] be +1 or -1 for non-intermediate tuples.

* src/truetype/ttgxvar.c (ft_var_apply_tuple): Implement it.
This commit is contained in:
Behdad Esfahbod 2016-03-09 20:35:27 +01:00 committed by Werner Lemberg
parent 495de6cc72
commit 74c0a72d52
2 changed files with 14 additions and 6 deletions
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9
ChangeLog
View File

@ -1,3 +1,12 @@
2016-03-09 Behdad Esfahbod <behdad@behdad.org>
[truetype] Fix handling of non-intermediate GX tuples.
We probably did not notice this as all fonts we tested had only
tuple_coords[i] be +1 or -1 for non-intermediate tuples.
* src/truetype/ttgxvar.c (ft_var_apply_tuple): Implement it.
2016-03-06 Alexei Podtelezhnikov <apodtele@gmail.com>
[base] Refuse to render enormous outlines (#47114).

11
src/truetype/ttgxvar.c
View File

@ -632,8 +632,8 @@
break;
}
else if ( ( blend->normalizedcoords[i] < 0 && tuple_coords[i] > 0 ) ||
( blend->normalizedcoords[i] > 0 && tuple_coords[i] < 0 ) )
else if ( ( blend->normalizedcoords[i] < FT_MIN( 0, tuple_coords[i] ) ) ||
( blend->normalizedcoords[i] > FT_MAX( 0, tuple_coords[i] ) ) )
{
FT_TRACE6(( " tuple coordinate value %.4f is exceeded, stop\n",
tuple_coords[i] / 65536.0 ));
@ -646,10 +646,9 @@
FT_TRACE6(( " tuple coordinate value %.4f fits\n",
tuple_coords[i] / 65536.0 ));
/* not an intermediate tuple */
apply = FT_MulFix( apply,
blend->normalizedcoords[i] > 0
? blend->normalizedcoords[i]
: -blend->normalizedcoords[i] );
apply = FT_MulDiv( apply,
blend->normalizedcoords[i],
tuple_coords[i] );
}
else if ( blend->normalizedcoords[i] < im_start_coords[i] ||