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[type1,cff] Add FT_{Set,Get}_MM_WeightVector API calls. 

For multiple master fonts, common usage (in Postscript) is to modify
the WeightVector of an existing font instance, this addition
supports that use.

* include/freetype/ftmm.h, src/base/ftmm.c (FT_Set_MM_WeightVector,
FT_Get_MM_WeightVector): New API functions.

* include/freetype/internalservices/svmm.h
(FT_Set_MM_WeightVector_Func, FT_Get_MM_WeightVector_Func): New
function types.
(MultiMasters): Add `set_mm_weightvector' and `get_mm_weightvector'
members.
(FT_DEFINE_SERVICE_MULTIMASTERSREC): Updated.

* src/cffcffdrivr.c (cff_set_mm_weightvector,
cff_get_mm_weightvector): New functions.
(cff_service_multi_masters): Register them.

* src/truetype/ttdriver.c (tt_service_gx_multi_masters): Updated.
This driver doesn't use the new interface.

* src/type1/t1load.c (T1_Set_MM_WeightVector,
T1_Get_MM_WeightVector): New functions.
* src/type1/t1driver.c (t1_service_multi_masters): Register them.
* src/type1/t1load.h: Updated.
This commit is contained in:
Chris Liddell 2018-11-27 22:24:06 +01:00 committed by Werner Lemberg
parent 1fc6937f7f
commit 78a1e69517
9 changed files with 371 additions and 63 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
ChangeLog
View File

@ -1,3 +1,33 @@
2018-11-27 Chris Liddell <chris.liddell@artifex.com>
[type1,cff] Add FT_{Set,Get}_MM_WeightVector API calls.
For multiple master fonts, common usage (in Postscript) is to modify
the WeightVector of an existing font instance, this addition
supports that use.
* include/freetype/ftmm.h, src/base/ftmm.c (FT_Set_MM_WeightVector,
FT_Get_MM_WeightVector): New API functions.
* include/freetype/internalservices/svmm.h
(FT_Set_MM_WeightVector_Func, FT_Get_MM_WeightVector_Func): New
function types.
(MultiMasters): Add `set_mm_weightvector' and `get_mm_weightvector'
members.
(FT_DEFINE_SERVICE_MULTIMASTERSREC): Updated.
* src/cffcffdrivr.c (cff_set_mm_weightvector,
cff_get_mm_weightvector): New functions.
(cff_service_multi_masters): Register them.
* src/truetype/ttdriver.c (tt_service_gx_multi_masters): Updated.
This driver doesn't use the new interface.
* src/type1/t1load.c (T1_Set_MM_WeightVector,
T1_Get_MM_WeightVector): New functions.
* src/type1/t1driver.c (t1_service_multi_masters): Register them.
* src/type1/t1load.h: Updated.
2018-11-27 Ben Wagner <bungeman@google.com>
[cff] Fix compiler warning (#55105).

92
include/freetype/ftmm.h
View File

@ -561,6 +561,98 @@ FT_BEGIN_HEADER
FT_Fixed* coords );
/**************************************************************************
*
* @function:
* FT_Set_MM_WeightVector
*
* @description:
* For Adobe MM fonts, choose an interpolated font design by directly
* setting the weight vector.
*
* This function can't be used with TrueType GX or OpenType variation
* fonts.
*
* @inout:
* face ::
* A handle to the source face.
*
* @input:
* len ::
* The length of the weight vector array. If it is larger than the
* number of designs, the extra values are ignored. If it is less than
* the number of designs, the remaining values are set to zero.
*
* weightvector ::
* An array representing the weight vector.
*
* @return:
* FreeType error code. 0~means success.
*
* @note:
* Adobe Multiple Master fonts limit the number of designs, and thus the
* length of the weight vector to~16.
*
* If `len` is zero and `weightvector` is NULL, the weight vector array
* is reset to the default values.
*
* The Adobe documentation also states that the values in the
* WeightVector array must total 1.0 +/-~0.001. In practice this does
* not seem to be enforced, so is not enforced here, either.
*
* @since:
* 2.10
*/
FT_EXPORT( FT_Error )
FT_Set_MM_WeightVector( FT_Face face,
FT_UInt len,
FT_Fixed* weightvector );
/**************************************************************************
*
* @function:
* FT_Get_MM_WeightVector
*
* @description:
* For Adobe MM fonts, retrieve the current weight vector of the font.
*
* This function can't be used with TrueType GX or OpenType variation
* fonts.
*
* @inout:
* face ::
* A handle to the source face.
*
* len ::
* A pointer to the size of the array to be filled. If the size of the
* array is less than the number of designs, `FT_Err_Invalid_Argument`
* is returned, and `len` is set to the required size (the number of
* designs). If the size of the array is greater than the number of
* designs, the remaining entries are set to~0. On successful
* completion, `len` is set to the number of designs (i.e., the number
* of values written to the array).
*
* @utput:
* weightvector ::
* An array to be filled.
*
* @return:
* FreeType error code. 0~means success.
*
* @note:
* Adobe Multiple Master fonts limit the number of designs, and thus the
* length of the WeightVector to~16.
*
* @since:
* 2.10
*/
FT_EXPORT( FT_Error )
FT_Get_MM_WeightVector( FT_Face face,
FT_UInt* len,
FT_Fixed* weightvector );
/**************************************************************************
*
* @enum:

82
include/freetype/internal/services/svmm.h
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@ -86,47 +86,63 @@ FT_BEGIN_HEADER
typedef void
(*FT_Done_Blend_Func)( FT_Face );
typedef FT_Error
(*FT_Set_MM_WeightVector_Func)( FT_Face face,
FT_UInt len,
FT_Fixed* weight_vector );
typedef FT_Error
(*FT_Get_MM_WeightVector_Func)( FT_Face face,
FT_UInt* len,
FT_Fixed* weight_vector );
FT_DEFINE_SERVICE( MultiMasters )
{
FT_Get_MM_Func get_mm;
FT_Set_MM_Design_Func set_mm_design;
FT_Set_MM_Blend_Func set_mm_blend;
FT_Get_MM_Blend_Func get_mm_blend;
FT_Get_MM_Var_Func get_mm_var;
FT_Set_Var_Design_Func set_var_design;
FT_Get_Var_Design_Func get_var_design;
FT_Set_Instance_Func set_instance;
FT_Get_MM_Func get_mm;
FT_Set_MM_Design_Func set_mm_design;
FT_Set_MM_Blend_Func set_mm_blend;
FT_Get_MM_Blend_Func get_mm_blend;
FT_Get_MM_Var_Func get_mm_var;
FT_Set_Var_Design_Func set_var_design;
FT_Get_Var_Design_Func get_var_design;
FT_Set_Instance_Func set_instance;
FT_Set_MM_WeightVector_Func set_mm_weightvector;
FT_Get_MM_WeightVector_Func get_mm_weightvector;
/* for internal use; only needed for code sharing between modules */
FT_Get_Var_Blend_Func get_var_blend;
FT_Done_Blend_Func done_blend;
FT_Get_Var_Blend_Func get_var_blend;
FT_Done_Blend_Func 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_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_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_, \
set_weightvector_, \
get_weightvector_, \
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_, \
get_var_blend_, \
done_blend_ \
};
/* */

61
src/base/ftmm.c
View File

@ -199,6 +199,67 @@
}
/* documentation is in ftmm.h */
FT_EXPORT_DEF( FT_Error )
FT_Set_MM_WeightVector( FT_Face face,
FT_UInt len,
FT_Fixed* weightvector )
{
FT_Error error;
FT_Service_MultiMasters service;
/* check of `face' delayed to `ft_face_get_mm_service' */
if ( len && !weightvector )
return FT_THROW( Invalid_Argument );
error = ft_face_get_mm_service( face, &service );
if ( !error )
{
error = FT_ERR( Invalid_Argument );
if ( service->set_mm_weightvector )
error = service->set_mm_weightvector( face, len, weightvector );
}
/* enforce recomputation of auto-hinting data */
if ( !error && face->autohint.finalizer )
{
face->autohint.finalizer( face->autohint.data );
face->autohint.data = NULL;
}
return error;
}
FT_EXPORT_DEF( FT_Error )
FT_Get_MM_WeightVector( FT_Face face,
FT_UInt* len,
FT_Fixed* weightvector )
{
FT_Error error;
FT_Service_MultiMasters service;
/* check of `face' delayed to `ft_face_get_mm_service' */
if ( len && !weightvector )
return FT_THROW( Invalid_Argument );
error = ft_face_get_mm_service( face, &service );
if ( !error )
{
error = FT_ERR( Invalid_Argument );
if ( service->get_mm_weightvector )
error = service->get_mm_weightvector( face, len, weightvector );
}
return error;
}
/* documentation is in ftmm.h */
FT_EXPORT_DEF( FT_Error )

46
src/cff/cffdrivr.c
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@ -867,6 +867,30 @@
}
static FT_Error
cff_set_mm_weightvector( CFF_Face face,
FT_UInt len,
FT_Fixed* weightvector )
{
FT_Service_MultiMasters mm = (FT_Service_MultiMasters)face->mm;
return mm->set_mm_weightvector( FT_FACE( face ), len, weightvector );
}
static FT_Error
cff_get_mm_weightvector( CFF_Face face,
FT_UInt* len,
FT_Fixed* weightvector )
{
FT_Service_MultiMasters mm = (FT_Service_MultiMasters)face->mm;
return mm->get_mm_weightvector( FT_FACE( face ), len, weightvector );
}
static FT_Error
cff_get_mm_var( CFF_Face face,
FT_MM_Var* *master )
@ -916,17 +940,19 @@
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_Set_MM_WeightVector_Func)cff_set_mm_weightvector, /* set_mm_weightvector */
(FT_Get_MM_WeightVector_Func)cff_get_mm_weightvector, /* get_mm_weightvector */
(FT_Get_Var_Blend_Func) cff_get_var_blend, /* get_var_blend */
(FT_Done_Blend_Func) cff_done_blend /* done_blend */
(FT_Get_Var_Blend_Func) cff_get_var_blend, /* get_var_blend */
(FT_Done_Blend_Func) cff_done_blend /* done_blend */
)

22
src/truetype/ttdriver.c
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@ -498,17 +498,19 @@
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_Set_MM_WeightVector_Func)NULL, /* set_mm_weightvector */
(FT_Get_MM_WeightVector_Func)NULL, /* get_mm_weightvector */
(FT_Get_Var_Blend_Func) tt_get_var_blend, /* get_var_blend */
(FT_Done_Blend_Func) tt_done_blend /* done_blend */
(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(

22
src/type1/t1driver.c
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@ -122,17 +122,19 @@
#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_Set_MM_WeightVector_Func)T1_Set_MM_WeightVector, /* set_mm_weightvector */
(FT_Get_MM_WeightVector_Func)T1_Get_MM_WeightVector, /* get_mm_weightvector */
(FT_Get_Var_Blend_Func) NULL, /* get_var_blend */
(FT_Done_Blend_Func) T1_Done_Blend /* done_blend */
(FT_Get_Var_Blend_Func) NULL, /* get_var_blend */
(FT_Done_Blend_Func) T1_Done_Blend /* done_blend */
};
#endif

69
src/type1/t1load.c
View File

@ -480,6 +480,75 @@
}
FT_LOCAL_DEF( FT_Error )
T1_Set_MM_WeightVector( T1_Face face,
FT_UInt len,
FT_Fixed* weightvector )
{
PS_Blend blend = face->blend;
FT_UInt i, n;
if ( !blend )
return FT_THROW( Invalid_Argument );
if ( !len && !weightvector )
{
for ( i = 0; i < blend->num_designs; i++ )
blend->weight_vector[i] = blend->default_weight_vector[i];
}
else
{
if ( !weightvector )
return FT_THROW( Invalid_Argument );
n = len < blend->num_designs ? len : blend->num_designs;
for ( i = 0; i < n; i++ )
blend->weight_vector[i] = weightvector[i];
for ( ; i < blend->num_designs; i++ )
blend->weight_vector[i] = (FT_Fixed)0;
if ( len )
face->root.face_flags |= FT_FACE_FLAG_VARIATION;
else
face->root.face_flags &= ~FT_FACE_FLAG_VARIATION;
}
return FT_Err_Ok;
}
FT_LOCAL_DEF( FT_Error )
T1_Get_MM_WeightVector( T1_Face face,
FT_UInt* len,
FT_Fixed* weightvector )
{
PS_Blend blend = face->blend;
FT_UInt i;
if ( !blend )
return FT_THROW( Invalid_Argument );
if ( *len < blend->num_designs )
{
*len = blend->num_designs;
return FT_THROW( Invalid_Argument );
}
for ( i = 0; i < blend->num_designs; i++ )
weightvector[i] = blend->weight_vector[i];
for ( ; i < *len; i++ )
weightvector[i] = (FT_Fixed)0;
*len = blend->num_designs;
return FT_Err_Ok;
}
FT_LOCAL_DEF( FT_Error )
T1_Set_MM_Design( T1_Face face,
FT_UInt num_coords,

10
src/type1/t1load.h
View File

@ -106,6 +106,16 @@ FT_BEGIN_HEADER
FT_LOCAL( void )
T1_Done_Blend( T1_Face face );
FT_LOCAL( FT_Error )
T1_Set_MM_WeightVector( T1_Face face,
FT_UInt len,
FT_Fixed* weightvector );
FT_LOCAL( FT_Error )
T1_Get_MM_WeightVector( T1_Face face,
FT_UInt* len,
FT_Fixed* weightvector );
#endif /* !T1_CONFIG_OPTION_NO_MM_SUPPORT */