New Variation Font function `FT_Get_Default_Named_Instance`.

* include/freetype/ftmm.h, src/base/ftmm.c (FT_Get_Default_Named_Instance):
New function.

* include/freetype/internal/services/svmm.h
(FT_Get_Default_Named_Instance_Func): New typedef.
(FT_Service_MultiMasters): New field `get_default_named_instance`.
(FT_DEFINE_SERVICE_MULTIMASTERSREC): Updated.

* include/freetype/internal/tttypes.h (TT_Face): New field
`var_default_named_instance`.

* src/sfnt/sfobjc.s (sfnt_init_face): Initialize
`var_default_named_instance`.

* src/cff/cffdrivr.c (cff_get_default_named_instance): New function.
(cff_service_multi_masters): Updated.

* src/truetype/ttgxvar.c (TT_Get_MM_Var): Initialize
`var_default_named_instance`.
(TT_Get_Default_Named_Instance): New function.
* src/truetype/ttgxvar.h: Updated.
* src/truetype/ttdriver.c (tt_service_gx_multi_masters): Updated.

* src/type1/t1driver.c (t1_service_multi_masters): Updated.

* docs/CHANGES: Updated.

11 files changed, 249 insertions, 91 deletions

diff --git a/docs/CHANGES b/docs/CHANGES
index bc85f9d57..105f976e8 100644
--- a/docs/CHANGES
+++ b/docs/CHANGES
@@ -1,3 +1,13 @@
+CHANGES BETWEEN 2.13.0 and 2.13.1 (2023-XXX-XX)
+
+  I. MISCELLANEOUS
+
+  - New function  `FT_Get_Default_Named_Instance` to get the  index of
+    the default named instance of an OpenType Variation Font.
+
+
+======================================================================
+
 CHANGES BETWEEN 2.12.1 and 2.13.0 (2023-Feb-09)
 
   I. IMPORTANT CHANGES
@@ -12,7 +22,7 @@ CHANGES BETWEEN 2.12.1 and 2.13.0 (2023-Feb-09)
       https://learn.microsoft.com/en-us/typography/opentype/spec/colr
 
 
-  III. MISCELLANEOUS
+  II. MISCELLANEOUS
 
   - For  OpenType  Variable Fonts,  `avar`  table  format 2.0  is  now
     supported.  The code was contributed by Behdad Esfahbod.
diff --git a/include/freetype/ftmm.h b/include/freetype/ftmm.h
index 3eabdd5f2..2c2f165fa 100644
--- a/include/freetype/ftmm.h
+++ b/include/freetype/ftmm.h
@@ -753,6 +753,45 @@ FT_BEGIN_HEADER
   FT_Set_Named_Instance( FT_Face  face,
                          FT_UInt  instance_index );
 
+
+  /**************************************************************************
+   *
+   * @function:
+   *   FT_Get_Default_Named_Instance
+   *
+   * @description:
+   *   Retrieve the index of the default named instance, to be used with
+   *   @FT_Set_Named_Instance.
+   *
+   *   The default instance of a variation font is that instance for which
+   *   the nth axis coordinate is equal to `axis[n].def` (as specified in the
+   *   @FT_MM_Var structure), with~n covering all axes.
+   *
+   *   FreeType synthesizes a named instance for the default instance if the
+   *   font does not contain such an entry.
+   *
+   * @input:
+   *   face ::
+   *     A handle to the source face.
+   *
+   * @output:
+   *   instance_index ::
+   *     The index of the default named instance.
+   *
+   * @return:
+   *   FreeType error code.  0~means success.
+   *
+   * @note:
+   *   For Adobe MM fonts (which don't have named instances) this function
+   *   always returns zero for `instance_index`.
+   *
+   * @since:
+   *   2.13.1
+   */
+  FT_EXPORT( FT_Error )
+  FT_Get_Default_Named_Instance( FT_Face   face,
+                                 FT_UInt  *instance_index );
+
   /* */
 
 
diff --git a/include/freetype/internal/services/svmm.h b/include/freetype/internal/services/svmm.h
index d94204232..f87b8acf7 100644
--- a/include/freetype/internal/services/svmm.h
+++ b/include/freetype/internal/services/svmm.h
@@ -74,6 +74,10 @@ FT_BEGIN_HEADER
                            FT_UInt  instance_index );
 
   typedef FT_Error
+  (*FT_Get_Default_Named_Instance_Func)( FT_Face   face,
+                                         FT_UInt  *instance_index );
+
+  typedef FT_Error
   (*FT_Get_MM_Blend_Func)( FT_Face   face,
                            FT_UInt   num_coords,
                            FT_Long*  coords );
@@ -135,6 +139,7 @@ FT_BEGIN_HEADER
     FT_Set_Var_Design_Func                set_var_design;
     FT_Get_Var_Design_Func                get_var_design;
     FT_Set_Instance_Func                  set_instance;
+    FT_Get_Default_Named_Instance_Func    get_default_named_instance;
     FT_Set_MM_WeightVector_Func           set_mm_weightvector;
     FT_Get_MM_WeightVector_Func           get_mm_weightvector;
 
@@ -149,43 +154,45 @@ FT_BEGIN_HEADER
   };
 
 
-#define FT_DEFINE_SERVICE_MULTIMASTERSREC( class_,                  \
-                                           get_mm_,                 \
-                                           set_mm_design_,          \
-                                           set_mm_blend_,           \
-                                           get_mm_blend_,           \
-                                           get_mm_var_,             \
-                                           set_var_design_,         \
-                                           get_var_design_,         \
-                                           set_instance_,           \
-                                           set_weightvector_,       \
-                                           get_weightvector_,       \
-                                           load_delta_set_idx_map_, \
-                                           load_item_var_store_,    \
-                                           get_item_delta_,         \
-                                           done_item_var_store_,    \
-                                           done_delta_set_idx_map_, \
-                                           get_var_blend_,          \
-                                           done_blend_ )            \
-  static const FT_Service_MultiMastersRec  class_ =                 \
-  {                                                                 \
-    get_mm_,                                                        \
-    set_mm_design_,                                                 \
-    set_mm_blend_,                                                  \
-    get_mm_blend_,                                                  \
-    get_mm_var_,                                                    \
-    set_var_design_,                                                \
-    get_var_design_,                                                \
-    set_instance_,                                                  \
-    set_weightvector_,                                              \
-    get_weightvector_,                                              \
-    load_delta_set_idx_map_,                                        \
-    load_item_var_store_,                                           \
-    get_item_delta_,                                                \
-    done_item_var_store_,                                           \
-    done_delta_set_idx_map_,                                        \
-    get_var_blend_,                                                 \
-    done_blend_                                                     \
+#define FT_DEFINE_SERVICE_MULTIMASTERSREC( class_,                      \
+                                           get_mm_,                     \
+                                           set_mm_design_,              \
+                                           set_mm_blend_,               \
+                                           get_mm_blend_,               \
+                                           get_mm_var_,                 \
+                                           set_var_design_,             \
+                                           get_var_design_,             \
+                                           set_instance_,               \
+                                           get_default_named_instance_, \
+                                           set_weightvector_,           \
+                                           get_weightvector_,           \
+                                           load_delta_set_idx_map_,     \
+                                           load_item_var_store_,        \
+                                           get_item_delta_,             \
+                                           done_item_var_store_,        \
+                                           done_delta_set_idx_map_,     \
+                                           get_var_blend_,              \
+                                           done_blend_ )                \
+  static const FT_Service_MultiMastersRec  class_ =                     \
+  {                                                                     \
+    get_mm_,                                                            \
+    set_mm_design_,                                                     \
+    set_mm_blend_,                                                      \
+    get_mm_blend_,                                                      \
+    get_mm_var_,                                                        \
+    set_var_design_,                                                    \
+    get_var_design_,                                                    \
+    set_instance_,                                                      \
+    get_default_named_instance_,                                        \
+    set_weightvector_,                                                  \
+    get_weightvector_,                                                  \
+    load_delta_set_idx_map_,                                            \
+    load_item_var_store_,                                               \
+    get_item_delta_,                                                    \
+    done_item_var_store_,                                               \
+    done_delta_set_idx_map_,                                            \
+    get_var_blend_,                                                     \
+    done_blend_                                                         \
   };
 
   /* */
diff --git a/include/freetype/internal/tttypes.h b/include/freetype/internal/tttypes.h
index af6830a4d..10af061b9 100644
--- a/include/freetype/internal/tttypes.h
+++ b/include/freetype/internal/tttypes.h
@@ -1315,6 +1315,9 @@ FT_BEGIN_HEADER
    *   var_postscript_prefix_len ::
    *     The length of the `var_postscript_prefix` string.
    *
+   *   var_default_named_instance ::
+   *     The index of the default named instance.
+   *
    *   horz_metrics_size ::
    *     The size of the 'hmtx' table.
    *
@@ -1552,6 +1555,7 @@ FT_BEGIN_HEADER
     const char*           var_postscript_prefix;     /* since 2.7.2 */
     FT_UInt               var_postscript_prefix_len; /* since 2.7.2 */
 
+    FT_UInt               var_default_named_instance;  /* since 2.13.1 */
 #endif
 
     /* since version 2.2 */
diff --git a/src/base/ftmm.c b/src/base/ftmm.c
index a2b4bd03d..781db315e 100644
--- a/src/base/ftmm.c
+++ b/src/base/ftmm.c
@@ -565,4 +565,32 @@
   }
 
 
+  /* documentation is in ftmm.h */
+
+  FT_EXPORT_DEF( FT_Error )
+  FT_Get_Default_Named_Instance( FT_Face   face,
+                                 FT_UInt  *instance_index )
+  {
+    FT_Error  error;
+
+    FT_Service_MultiMasters  service_mm = NULL;
+
+
+    /* check of `face' delayed to `ft_face_get_mm_service' */
+
+    error = ft_face_get_mm_service( face, &service_mm );
+    if ( !error )
+    {
+      /* no error if `get_default_named_instance` is not available */
+      if ( service_mm->get_default_named_instance )
+        error = service_mm->get_default_named_instance( face,
+                                                        instance_index );
+      else
+        error = FT_Err_Ok;
+    }
+
+    return error;
+  }
+
+
 /* END */
diff --git a/src/cff/cffdrivr.c b/src/cff/cffdrivr.c
index 7d45e4641..d9ed35b2b 100644
--- a/src/cff/cffdrivr.c
+++ b/src/cff/cffdrivr.c
@@ -943,6 +943,17 @@
 
 
   static FT_Error
+  cff_get_default_named_instance( CFF_Face  face,
+                                  FT_UInt  *instance_index )
+  {
+    FT_Service_MultiMasters  mm = (FT_Service_MultiMasters)face->mm;
+
+
+    return mm->get_default_named_instance( FT_FACE( face ), instance_index );
+  }
+
+
+  static FT_Error
   cff_load_item_variation_store( CFF_Face         face,
                                  FT_ULong         offset,
                                  GX_ItemVarStore  itemStore )
@@ -1009,36 +1020,39 @@
   FT_DEFINE_SERVICE_MULTIMASTERSREC(
     cff_service_multi_masters,
 
-    (FT_Get_MM_Func)        NULL,               /* get_mm                    */
-    (FT_Set_MM_Design_Func) NULL,               /* set_mm_design             */
-    (FT_Set_MM_Blend_Func)  cff_set_mm_blend,   /* set_mm_blend              */
-    (FT_Get_MM_Blend_Func)  cff_get_mm_blend,   /* get_mm_blend              */
-    (FT_Get_MM_Var_Func)    cff_get_mm_var,     /* get_mm_var                */
-    (FT_Set_Var_Design_Func)cff_set_var_design, /* set_var_design            */
-    (FT_Get_Var_Design_Func)cff_get_var_design, /* get_var_design            */
-    (FT_Set_Instance_Func)  cff_set_instance,   /* set_instance              */
+    (FT_Get_MM_Func)        NULL,               /* get_mm                     */
+    (FT_Set_MM_Design_Func) NULL,               /* set_mm_design              */
+    (FT_Set_MM_Blend_Func)  cff_set_mm_blend,   /* set_mm_blend               */
+    (FT_Get_MM_Blend_Func)  cff_get_mm_blend,   /* get_mm_blend               */
+    (FT_Get_MM_Var_Func)    cff_get_mm_var,     /* get_mm_var                 */
+    (FT_Set_Var_Design_Func)cff_set_var_design, /* set_var_design             */
+    (FT_Get_Var_Design_Func)cff_get_var_design, /* get_var_design             */
+    (FT_Set_Instance_Func)  cff_set_instance,   /* set_instance               */
+    (FT_Get_Default_Named_Instance_Func)
+                            cff_get_default_named_instance,
+                                                /* get_default_named_instance */
     (FT_Set_MM_WeightVector_Func)
                             cff_set_mm_weightvector,
-                                                /* set_mm_weightvector       */
+                                                /* set_mm_weightvector        */
     (FT_Get_MM_WeightVector_Func)
                             cff_get_mm_weightvector,
-                                                /* get_mm_weightvector       */
+                                                /* get_mm_weightvector        */
     (FT_Var_Load_Delta_Set_Idx_Map_Func)
                             cff_load_delta_set_index_mapping,
-                                                /* load_delta_set_idx_map    */
+                                                /* load_delta_set_idx_map     */
     (FT_Var_Load_Item_Var_Store_Func)
                             cff_load_item_variation_store,
-                                                /* load_item_variation_store */
+                                                /* load_item_variation_store  */
     (FT_Var_Get_Item_Delta_Func)
-                            cff_get_item_delta, /* get_item_delta            */
+                            cff_get_item_delta, /* get_item_delta             */
     (FT_Var_Done_Item_Var_Store_Func)
                             cff_done_item_variation_store,
-                                                /* done_item_variation_store */
+                                                /* done_item_variation_store  */
     (FT_Var_Done_Delta_Set_Idx_Map_Func)
                             cff_done_delta_set_index_map,
-                                                /* done_delta_set_index_map  */
-    (FT_Get_Var_Blend_Func) cff_get_var_blend,  /* get_var_blend             */
-    (FT_Done_Blend_Func)    cff_done_blend      /* done_blend                */
+                                                /* done_delta_set_index_map   */
+    (FT_Get_Var_Blend_Func) cff_get_var_blend,  /* get_var_blend              */
+    (FT_Done_Blend_Func)    cff_done_blend      /* done_blend                 */
   )
 
 
diff --git a/src/sfnt/sfobjs.c b/src/sfnt/sfobjs.c
index 13f2f45f4..1574c353d 100644
--- a/src/sfnt/sfobjs.c
+++ b/src/sfnt/sfobjs.c
@@ -698,6 +698,9 @@
           instance_offset += instance_size;
         }
 
+        /* named instance indices start with value 1 */
+        face->var_default_named_instance = i + 1;
+
         if ( i == num_instances )
         {
           /* no default instance in named instance table; */
diff --git a/src/truetype/ttdriver.c b/src/truetype/ttdriver.c
index c2e041cd3..c128be19d 100644
--- a/src/truetype/ttdriver.c
+++ b/src/truetype/ttdriver.c
@@ -517,34 +517,37 @@
   FT_DEFINE_SERVICE_MULTIMASTERSREC(
     tt_service_gx_multi_masters,
 
-    (FT_Get_MM_Func)        NULL,                  /* get_mm                    */
-    (FT_Set_MM_Design_Func) NULL,                  /* set_mm_design             */
-    (FT_Set_MM_Blend_Func)  TT_Set_MM_Blend,       /* set_mm_blend              */
-    (FT_Get_MM_Blend_Func)  TT_Get_MM_Blend,       /* get_mm_blend              */
-    (FT_Get_MM_Var_Func)    TT_Get_MM_Var,         /* get_mm_var                */
-    (FT_Set_Var_Design_Func)TT_Set_Var_Design,     /* set_var_design            */
-    (FT_Get_Var_Design_Func)TT_Get_Var_Design,     /* get_var_design            */
-    (FT_Set_Instance_Func)  TT_Set_Named_Instance, /* set_instance              */
+    (FT_Get_MM_Func)        NULL,                  /* get_mm                     */
+    (FT_Set_MM_Design_Func) NULL,                  /* set_mm_design              */
+    (FT_Set_MM_Blend_Func)  TT_Set_MM_Blend,       /* set_mm_blend               */
+    (FT_Get_MM_Blend_Func)  TT_Get_MM_Blend,       /* get_mm_blend               */
+    (FT_Get_MM_Var_Func)    TT_Get_MM_Var,         /* get_mm_var                 */
+    (FT_Set_Var_Design_Func)TT_Set_Var_Design,     /* set_var_design             */
+    (FT_Get_Var_Design_Func)TT_Get_Var_Design,     /* get_var_design             */
+    (FT_Set_Instance_Func)  TT_Set_Named_Instance, /* set_instance               */
+    (FT_Get_Default_Named_Instance_Func)
+                            TT_Get_Default_Named_Instance,
+                                                   /* get_default_named_instance */
     (FT_Set_MM_WeightVector_Func)
-                            NULL,                  /* set_mm_weightvector       */
+                            NULL,                  /* set_mm_weightvector        */
     (FT_Get_MM_WeightVector_Func)
-                            NULL,                  /* get_mm_weightvector       */
+                            NULL,                  /* get_mm_weightvector        */
     (FT_Var_Load_Delta_Set_Idx_Map_Func)
                             tt_var_load_delta_set_index_mapping,
-                                                   /* load_delta_set_idx_map    */
+                                                   /* load_delta_set_idx_map     */
     (FT_Var_Load_Item_Var_Store_Func)
                             tt_var_load_item_variation_store,
-                                                   /* load_item_variation_store */
+                                                   /* load_item_variation_store  */
     (FT_Var_Get_Item_Delta_Func)
-                            tt_var_get_item_delta, /* get_item_delta            */
+                            tt_var_get_item_delta, /* get_item_delta             */
     (FT_Var_Done_Item_Var_Store_Func)
                             tt_var_done_item_variation_store,
-                                                   /* done_item_variation_store */
+                                                   /* done_item_variation_store  */
     (FT_Var_Done_Delta_Set_Idx_Map_Func)
                             tt_var_done_delta_set_index_map,
-                                                   /* done_delta_set_index_map  */
-    (FT_Get_Var_Blend_Func) tt_get_var_blend,      /* get_var_blend             */
-    (FT_Done_Blend_Func)    tt_done_blend          /* done_blend                */
+                                                   /* done_delta_set_index_map   */
+    (FT_Get_Var_Blend_Func) tt_get_var_blend,      /* get_var_blend              */
+    (FT_Done_Blend_Func)    tt_done_blend          /* done_blend                 */
   )
 
   FT_DEFINE_SERVICE_METRICSVARIATIONSREC(
diff --git a/src/truetype/ttgxvar.c b/src/truetype/ttgxvar.c
index 963dcb7e3..d28cc245e 100644
--- a/src/truetype/ttgxvar.c
+++ b/src/truetype/ttgxvar.c
@@ -2630,8 +2630,10 @@
         FT_UInt  strid = ~0U;
 
 
-        /* the default instance is missing in array the   */
-        /* of named instances; try to synthesize an entry */
+        /* The default instance is missing in array the    */
+        /* of named instances; try to synthesize an entry. */
+        /* If this fails, `default_named_instance` remains */
+        /* at value zero, which doesn't do any harm.       */
         found = sfnt->get_name_id( face,
                                    TT_NAME_ID_TYPOGRAPHIC_SUBFAMILY,
                                    &dummy1,
@@ -2659,6 +2661,9 @@
             FT_TRACE5(( "TT_Get_MM_Var:"
                         " Adding default instance to named instances\n" ));
 
+            /* named instance indices start with value 1 */
+            face->var_default_named_instance = num_instances;
+
             ns = &mmvar->namedstyle[fvar_head.instanceCount];
 
             ns->strid = strid;
@@ -3386,6 +3391,45 @@
   }
 
 
+  /**************************************************************************
+   *
+   * @Function:
+   *   TT_Get_Default_Named_Instance
+   *
+   * @Description:
+   *   Get the default named instance.
+   *
+   * @Input:
+   *   face ::
+   *     A handle to the source face.
+   *
+   * @Output:
+   *   instance_index ::
+   *     The default named instance index.
+   *
+   * @Return:
+   *   FreeType error code.  0~means success.
+   */
+  FT_LOCAL_DEF( FT_Error )
+  TT_Get_Default_Named_Instance( TT_Face   face,
+                                 FT_UInt  *instance_index )
+  {
+    FT_Error  error = FT_Err_Ok;
+
+
+    if ( !face->blend )
+    {
+      if ( FT_SET_ERROR( TT_Get_MM_Var( face, NULL ) ) )
+        goto Exit;
+    }
+
+    *instance_index = face->var_default_named_instance;
+
+  Exit:
+    return error;
+  }
+
+
   /*************************************************************************/
   /*************************************************************************/
   /*****                                                               *****/
diff --git a/src/truetype/ttgxvar.h b/src/truetype/ttgxvar.h
index 4fec980dc..0c096f7df 100644
--- a/src/truetype/ttgxvar.h
+++ b/src/truetype/ttgxvar.h
@@ -375,6 +375,10 @@ FT_BEGIN_HEADER
                          FT_UInt  instance_index );
 
   FT_LOCAL( FT_Error )
+  TT_Get_Default_Named_Instance( TT_Face   face,
+                                 FT_UInt  *instance_index );
+
+  FT_LOCAL( FT_Error )
   tt_face_vary_cvt( TT_Face    face,
                     FT_Stream  stream );
 
diff --git a/src/type1/t1driver.c b/src/type1/t1driver.c
index ded3b264e..5d0fe533c 100644
--- a/src/type1/t1driver.c
+++ b/src/type1/t1driver.c
@@ -121,30 +121,32 @@
 #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
   static const FT_Service_MultiMastersRec  t1_service_multi_masters =
   {
-    (FT_Get_MM_Func)        T1_Get_Multi_Master,    /* get_mm                    */
-    (FT_Set_MM_Design_Func) T1_Set_MM_Design,       /* set_mm_design             */
-    (FT_Set_MM_Blend_Func)  T1_Set_MM_Blend,        /* set_mm_blend              */
-    (FT_Get_MM_Blend_Func)  T1_Get_MM_Blend,        /* get_mm_blend              */
-    (FT_Get_MM_Var_Func)    T1_Get_MM_Var,          /* get_mm_var                */
-    (FT_Set_Var_Design_Func)T1_Set_Var_Design,      /* set_var_design            */
-    (FT_Get_Var_Design_Func)T1_Get_Var_Design,      /* get_var_design            */
-    (FT_Set_Instance_Func)  T1_Reset_MM_Blend,      /* set_instance              */
+    (FT_Get_MM_Func)        T1_Get_Multi_Master,    /* get_mm                     */
+    (FT_Set_MM_Design_Func) T1_Set_MM_Design,       /* set_mm_design              */
+    (FT_Set_MM_Blend_Func)  T1_Set_MM_Blend,        /* set_mm_blend               */
+    (FT_Get_MM_Blend_Func)  T1_Get_MM_Blend,        /* get_mm_blend               */
+    (FT_Get_MM_Var_Func)    T1_Get_MM_Var,          /* get_mm_var                 */
+    (FT_Set_Var_Design_Func)T1_Set_Var_Design,      /* set_var_design             */
+    (FT_Get_Var_Design_Func)T1_Get_Var_Design,      /* get_var_design             */
+    (FT_Set_Instance_Func)  T1_Reset_MM_Blend,      /* set_instance               */
+    (FT_Get_Default_Named_Instance_Func)
+                            NULL,                   /* get_default_named_instance */
     (FT_Set_MM_WeightVector_Func)
-                            T1_Set_MM_WeightVector, /* set_mm_weightvector       */
+                            T1_Set_MM_WeightVector, /* set_mm_weightvector        */
     (FT_Get_MM_WeightVector_Func)
-                            T1_Get_MM_WeightVector, /* get_mm_weightvector       */
+                            T1_Get_MM_WeightVector, /* get_mm_weightvector        */
     (FT_Var_Load_Delta_Set_Idx_Map_Func)
-                            NULL,                   /* load_delta_set_idx_map    */
+                            NULL,                   /* load_delta_set_idx_map     */
     (FT_Var_Load_Item_Var_Store_Func)
-                            NULL,                   /* load_item_variation_store */
+                            NULL,                   /* load_item_variation_store  */
     (FT_Var_Get_Item_Delta_Func)
-                            NULL,                   /* get_item_delta            */
+                            NULL,                   /* get_item_delta             */
     (FT_Var_Done_Item_Var_Store_Func)
-                            NULL,                   /* done_item_variation_store */
+                            NULL,                   /* done_item_variation_store  */
     (FT_Var_Done_Delta_Set_Idx_Map_Func)
-                            NULL,                   /* done_delta_set_index_map  */
-    (FT_Get_Var_Blend_Func) NULL,                   /* get_var_blend             */
-    (FT_Done_Blend_Func)    T1_Done_Blend           /* done_blend                */
+                            NULL,                   /* done_delta_set_index_map   */
+    (FT_Get_Var_Blend_Func) NULL,                   /* get_var_blend              */
+    (FT_Done_Blend_Func)    T1_Done_Blend           /* done_blend                 */
   };
 #endif