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[truetype] Fix style name handling for variation fonts.

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* include/freetype/internal/tttypes.h (TT_FaceRec): New field
`non_var_style_name`.

* src/sfnt/sfobjs.c (sfnt_load_face): Initialize `non_var_style_name`.
(sfnt_done_face): Free `non_var_style_name`.

* src/truetype/ttgxvar.c (TT_Set_Named_Instance): Restore non-VF style name
if switching back to non-VF mode.
This commit is contained in:
Werner Lemberg 2023-04-27 23:06:51 +02:00
parent c8a24209d3
commit 8fe50c2adc
3 changed files with 25 additions and 2 deletions
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5
include/freetype/internal/tttypes.h
View File

@ -1318,6 +1318,9 @@ FT_BEGIN_HEADER
* var_default_named_instance ::
* The index of the default named instance.
*
* non_var_style_name ::
* The non-variation style name, used as a backup.
*
* horz_metrics_size ::
* The size of the 'hmtx' table.
*
@ -1556,6 +1559,8 @@ FT_BEGIN_HEADER
FT_UInt var_postscript_prefix_len; /* since 2.7.2 */
FT_UInt var_default_named_instance; /* since 2.13.1 */
const char* non_var_style_name; /* since 2.13.1 */
#endif
/* since version 2.2 */

11
src/sfnt/sfobjs.c
View File

@ -1063,6 +1063,16 @@
GET_NAME( FONT_SUBFAMILY, &face->root.style_name );
}
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
{
FT_Memory memory = face->root.memory;
if ( FT_STRDUP( face->non_var_style_name, face->root.style_name ) )
goto Exit;
}
#endif
/* now set up root fields */
{
FT_Face root = &face->root;
@ -1509,6 +1519,7 @@
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
FT_FREE( face->var_postscript_prefix );
FT_FREE( face->non_var_style_name );
#endif
/* freeing glyph color palette data */

11
src/truetype/ttgxvar.c
View File

@ -3306,6 +3306,8 @@
GX_Blend blend;
FT_MM_Var* mmvar;
FT_Memory memory = face->root.memory;
FT_UInt num_instances;
@ -3329,8 +3331,7 @@
if ( instance_index > 0 )
{
FT_Memory memory = face->root.memory;
SFNT_Service sfnt = (SFNT_Service)face->sfnt;
SFNT_Service sfnt = (SFNT_Service)face->sfnt;
FT_Var_Named_Style* named_style;
FT_String* style_name;
@ -3354,7 +3355,13 @@
named_style->coords );
}
else
{
/* restore non-VF style name */
FT_FREE( face->root.style_name );
if ( FT_STRDUP( face->root.style_name, face->non_var_style_name ) )
goto Exit;
error = TT_Set_Var_Design( face, 0, NULL );
}
Exit:
return error;