Commit fb982e78a7d4468aa55ae2b560f0213d289c52fa
2023-04-26T08:17:17
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.
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diff --git a/docs/CHANGES b/docs/CHANGES
index bc85f9d..105f976 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 3eabdd5..2c2f165 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 d942042..f87b8ac 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 af6830a..10af061 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 a2b4bd0..781db31 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 7d45e46..d9ed35b 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 13f2f45..1574c35 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 c2e041c..c128be1 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 963dcb7..d28cc24 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 4fec980..0c096f7 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 ded3b26..5d0fe53 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