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[truetype] Variation font API stability issues. 

Make some functions work before a call to `TT_Set_MM_Blend'.

* src/truetype/ttgxvar.c (tt_hadvance_adjust): Exit immediately if
we don't blend.
(TT_Get_MM_Blend, TT_Get_Var_Design): Return default values if we
don't blend.
This commit is contained in:
Werner Lemberg 2016-12-29 21:39:06 +01:00
parent 91fc3bd7c9
commit 7591bf11d1
2 changed files with 33 additions and 5 deletions
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11
ChangeLog
View File

@ -1,3 +1,14 @@
2016-12-29 Werner Lemberg <wl@gnu.org>
[truetype] Variation font API stability issues.
Make some functions work before a call to `TT_Set_MM_Blend'.
* src/truetype/ttgxvar.c (tt_hadvance_adjust): Exit immediately if
we don't blend.
(TT_Get_MM_Blend, TT_Get_Var_Design): Return default values if we
don't blend.
2016-12-29 Werner Lemberg <wl@gnu.org>
* src/truetype/ttgxvar.c (TT_Get_MM_Var): Check axis data.

27
src/truetype/ttgxvar.c
View File

@ -786,7 +786,7 @@
FT_Fixed delta;
if ( !face->blend )
if ( !face->doblend || !face->blend )
goto Exit;
if ( !face->blend->hvar_loaded )
@ -1745,8 +1745,17 @@
nc = blend->num_axis;
}
for ( i = 0; i < nc; i++ )
coords[i] = blend->normalizedcoords[i];
if ( face->doblend )
{
for ( i = 0; i < nc; i++ )
coords[i] = blend->normalizedcoords[i];
}
else
{
for ( i = 0; i < nc; i++ )
coords[i] = 0;
}
for ( ; i < num_coords; i++ )
coords[i] = 0;
@ -1947,8 +1956,16 @@
nc = blend->num_axis;
}
for ( i = 0; i < nc; ++i )
coords[i] = blend->normalizedcoords[i];
if ( face->doblend )
{
for ( i = 0; i < nc; i++ )
coords[i] = blend->normalizedcoords[i];
}
else
{
for ( i = 0; i < nc; i++ )
coords[i] = 0;
}
for ( ; i < num_coords; i++ )
coords[i] = 0;