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[truetype] Correctly handle variation font phantom points (#52683). 

* src/truetype/ttgxvar.c (TT_Vary_Apply_Glyph_Deltas): Fix phantom
point indices.
This commit is contained in:
Jonathan Kew 2017-12-17 15:07:02 +01:00 committed by Werner Lemberg
parent 7d3dfcd4a5
commit 361af72eea
2 changed files with 18 additions and 11 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2017-12-17 Jonathan Kew <jfkthame@gmail.com>
[truetype] Correctly handle variation font phantom points (#52683).
* src/truetype/ttgxvar.c (TT_Vary_Apply_Glyph_Deltas): Fix phantom
point indices.
2017-12-17 Jonathan Kew <jfkthame@gmail.com>
Fix incorrect advance width scaling (#52683).

22
src/truetype/ttgxvar.c
View File

@ -3630,7 +3630,7 @@
FT_Pos delta_y = FT_MulFix( deltas_y[j], apply );
if ( j < n_points - 3 )
if ( j < n_points - 4 )
{
outline->points[j].x += delta_x;
outline->points[j].y += delta_y;
@ -3640,25 +3640,25 @@
/* To avoid double adjustment of advance width or height, */
/* adjust phantom points only if there is no HVAR or VVAR */
/* support, respectively. */
if ( j == ( n_points - 3 ) &&
!( face->variation_support &
TT_FACE_FLAG_VAR_HADVANCE ) )
if ( j == ( n_points - 4 ) &&
!( face->variation_support &
TT_FACE_FLAG_VAR_LSB ) )
outline->points[j].x += delta_x;
else if ( j == ( n_points - 3 ) &&
!( face->variation_support &
TT_FACE_FLAG_VAR_HADVANCE ) )
outline->points[j].x += delta_x;
else if ( j == ( n_points - 2 ) &&
!( face->variation_support &
TT_FACE_FLAG_VAR_LSB ) )
outline->points[j].x += delta_x;
TT_FACE_FLAG_VAR_TSB ) )
outline->points[j].y += delta_y;
else if ( j == ( n_points - 1 ) &&
!( face->variation_support &
TT_FACE_FLAG_VAR_VADVANCE ) )
outline->points[j].y += delta_y;
else if ( j == ( n_points - 0 ) &&
!( face->variation_support &
TT_FACE_FLAG_VAR_TSB ) )
outline->points[j].y += delta_y;
}
#ifdef FT_DEBUG_LEVEL_TRACE