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[CFF] Extract `BlueValues` as `Fixed` rather than `Int`. 

This is a follow-up to commit 26a7f047,

  [cff] Make blend operator work with floats in private dicts.

which addressed the 'party baseline' bug.  However, the reporting user
indicated that the default location and some other points in design space
rendered OK, but other points in design space still had problems.  The most
obvious issue being that the x-heights of lower-case letters did not align;
see

  https://github.com/adobe-fonts/source-serif/issues/121#issuecomment-1773794136

After some analysis we determined that this was due to an interaction
between `BlueValue` rounding and the zone-based algorithm.  In short, for a
point to be considered in a zone it must fall within the bounds of the zone.
(There is a slop factor in some cases, but only a very small one.)  In the
Adobe-contributed side of the code, point values are not integer-rounded,
instead they're kept as (some form of) fixed.  Rounding just the `BlueValues`
means that points that need to be considered within a zone will fall outside
of it at some points in design space.

The majority of this patch changes the storage and parsing of `BlueValues`
to keep them as `FT_Fixed`.  No significant code changes were needed because
the values are converted to `Fixed` anyway when stored in `CF_BlueRec`.  No
attempt was made to address problems in the older pshinter code beyond
converting the values from `FT_Fixed` to `FT_Short` when copying the private
dictionary.  (However, as the point values are also rounded in that code,
the problem is much less likely to occur, although inconsistency between
rounding and truncation could cause an analogous problem.)

* include/freetype/internal/cfftypes.h (CFF_PrivateRec): Use `FT_Fixed` for
`blue_values`, `other_blues`, `family_blues`, and `family_other_blues`.

* src/cff/cffload.c (cff_blend_doBlend): Updated.

* src/cff/cffobjs.c (CFF_fixedToInt): New macro.
(cff_make_private_dict): Use it.

* src/cff/cffparse.h (cff_kind_delta_fixed): New enum value.

* src/cff/cffparse.c (do_fixed): Updated.
(CFF_FIELD_DELTA, CFF_FIELD_DELTA_FIXED, CFF_DELTA_KIND): New set of macros,
replacing `CFF_FIELD_DELTA`.
(cff_parser_run): Updated to handle fixed-float deltas.

* src/cff/cfftoken.h: Updated to use `CFF_FIELD_DELTA_FIXED` for blue
values.

* src/psaux/psblues.c (cf2_blueToFixed): Removed, no longer needed.
(cf2_blues_init): Updated.

* src/pxaux/psft.c, src/pxaux/psft.h (cf2_getBlueValues, cf2_getOtherBlues,
cf2_getFamilyBlues, cf2_getFamilyOtherBlues): Updated signatures.

* src/psaux/psobjs.c (t1_make_subfont): Updated.
This commit is contained in:
Skef Iterum 2023-12-14 06:59:05 +01:00 committed by Werner Lemberg
parent 6f2bf6a582
commit 8eab511017
10 changed files with 149 additions and 119 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
include/freetype/internal/cfftypes.h
View File

@ -248,10 +248,10 @@ FT_BEGIN_HEADER
FT_Byte num_family_blues;
FT_Byte num_family_other_blues;
FT_Pos blue_values[14];
FT_Pos other_blues[10];
FT_Pos family_blues[14];
FT_Pos family_other_blues[10];
FT_Fixed blue_values[14];
FT_Fixed other_blues[10];
FT_Fixed family_blues[14];
FT_Fixed family_other_blues[10];
FT_Fixed blue_scale;
FT_Pos blue_shift;

8
src/cff/cffload.c
View File

@ -1379,10 +1379,10 @@
/* opcode in both CFF and CFF2 DICTs. See `cff_parse_num' for */
/* decode of this, which rounds to an integer. */
*subFont->blend_top++ = 255;
*subFont->blend_top++ = (FT_Byte)( sum >> 24 );
*subFont->blend_top++ = (FT_Byte)( sum >> 16 );
*subFont->blend_top++ = (FT_Byte)( sum >> 8 );
*subFont->blend_top++ = (FT_Byte)sum;
*subFont->blend_top++ = (FT_Byte)( (FT_UInt32)sum >> 24 );
*subFont->blend_top++ = (FT_Byte)( (FT_UInt32)sum >> 16 );
*subFont->blend_top++ = (FT_Byte)( (FT_UInt32)sum >> 8 );
*subFont->blend_top++ = (FT_Byte)( (FT_UInt32)sum );
}
/* leave only numBlends results on parser stack */

11
src/cff/cffobjs.c
View File

@ -42,6 +42,8 @@
#include <freetype/internal/psaux.h>
#include <freetype/internal/services/svcfftl.h>
#define CFF_fixedToInt( x ) \
( (FT_Short)( ( (x) + 0x8000U ) >> 16 ) )
/**************************************************************************
*
@ -124,19 +126,20 @@
count = priv->num_blue_values = cpriv->num_blue_values;
for ( n = 0; n < count; n++ )
priv->blue_values[n] = (FT_Short)cpriv->blue_values[n];
priv->blue_values[n] = CFF_fixedToInt( cpriv->blue_values[n] );
count = priv->num_other_blues = cpriv->num_other_blues;
for ( n = 0; n < count; n++ )
priv->other_blues[n] = (FT_Short)cpriv->other_blues[n];
priv->other_blues[n] = CFF_fixedToInt( cpriv->other_blues[n] );
count = priv->num_family_blues = cpriv->num_family_blues;
for ( n = 0; n < count; n++ )
priv->family_blues[n] = (FT_Short)cpriv->family_blues[n];
priv->family_blues[n] = CFF_fixedToInt( cpriv->family_blues[n] );
count = priv->num_family_other_blues = cpriv->num_family_other_blues;
for ( n = 0; n < count; n++ )
priv->family_other_blues[n] = (FT_Short)cpriv->family_other_blues[n];
priv->family_other_blues[n] =
CFF_fixedToInt( cpriv->family_other_blues[n] );
priv->blue_scale = cpriv->blue_scale;
priv->blue_shift = (FT_Int)cpriv->blue_shift;

87
src/cff/cffparse.c
View File

@ -501,10 +501,10 @@
return cff_parse_real( *d, parser->limit, scaling, NULL );
else if ( **d == 255 )
{
FT_Fixed val = ( ( ( (FT_UInt32)*( d[0] + 1 ) << 24 ) |
( (FT_UInt32)*( d[0] + 2 ) << 16 ) |
( (FT_UInt32)*( d[0] + 3 ) << 8 ) |
(FT_UInt32)*( d[0] + 4 ) ) );
FT_Fixed val = (FT_Int32)( ( ( (FT_UInt32)*( d[0] + 1 ) << 24 ) |
( (FT_UInt32)*( d[0] + 2 ) << 16 ) |
( (FT_UInt32)*( d[0] + 3 ) << 8 ) |
(FT_UInt32)*( d[0] + 4 ) ) );
if ( scaling )
{
@ -1031,10 +1031,14 @@
CFF_FIELD( code, name, id, cff_kind_string )
#define CFF_FIELD_BOOL( code, name, id ) \
CFF_FIELD( code, name, id, cff_kind_bool )
#define CFF_FIELD_DELTA( code, name, max, id ) \
CFF_FIELD_DELTA_KIND( code, name, max, id, cff_kind_delta )
#define CFF_FIELD_DELTA_FIXED( code, name, max, id ) \
CFF_FIELD_DELTA_KIND( code, name, max, id, cff_kind_delta_fixed )
#undef CFF_FIELD
#undef CFF_FIELD_DELTA
#undef CFF_FIELD_DELTA_KIND
#ifndef FT_DEBUG_LEVEL_TRACE
@ -1067,15 +1071,15 @@
NULL, 0, 0 \
},
#define CFF_FIELD_DELTA( code, name, max, id ) \
{ \
cff_kind_delta, \
code | CFFCODE, \
FT_FIELD_OFFSET( name ), \
FT_FIELD_SIZE_DELTA( name ), \
NULL, \
max, \
FT_FIELD_OFFSET( num_ ## name ) \
#define CFF_FIELD_DELTA_KIND( code, name, max, id, kind ) \
{ \
kind, \
code | CFFCODE, \
FT_FIELD_OFFSET( name ), \
FT_FIELD_SIZE_DELTA( name ), \
NULL, \
max, \
FT_FIELD_OFFSET( num_ ## name ) \
},
static const CFF_Field_Handler cff_field_handlers[] =
@ -1121,16 +1125,16 @@
id \
},
#define CFF_FIELD_DELTA( code, name, max, id ) \
{ \
cff_kind_delta, \
code | CFFCODE, \
FT_FIELD_OFFSET( name ), \
FT_FIELD_SIZE_DELTA( name ), \
NULL, \
max, \
FT_FIELD_OFFSET( num_ ## name ), \
id \
#define CFF_FIELD_DELTA_KIND( code, name, max, id, kind ) \
{ \
kind, \
code | CFFCODE, \
FT_FIELD_OFFSET( name ), \
FT_FIELD_SIZE_DELTA( name ), \
NULL, \
max, \
FT_FIELD_OFFSET( num_ ## name ), \
id \
},
static const CFF_Field_Handler cff_field_handlers[] =
@ -1356,7 +1360,8 @@
/* check that we have enough arguments -- except for */
/* delta encoded arrays, which can be empty */
if ( field->kind != cff_kind_delta && num_args < 1 )
if ( field->kind != cff_kind_delta &&
field->kind != cff_kind_delta_fixed && num_args < 1 )
goto Stack_Underflow;
switch ( field->kind )
@ -1471,6 +1476,38 @@
}
break;
case cff_kind_delta_fixed:
{
FT_Byte* qcount = (FT_Byte*)parser->object +
field->count_offset;
FT_Byte** data = parser->stack;
if ( num_args > field->array_max )
num_args = field->array_max;
FT_TRACE4(( " [" ));
/* store count */
*qcount = (FT_Byte)num_args;
val = 0;
while ( num_args > 0 )
{
val = ADD_LONG( val, cff_parse_fixed( parser, data++ ) );
*(FT_Long*)q = val;
FT_TRACE4(( " %f\n", (double)val / 65536 ));
q += field->size;
num_args--;
}
FT_TRACE4(( "]\n" ));
}
break;
default: /* callback or blend */
error = field->reader( parser );
if ( error )

1
src/cff/cffparse.h
View File

@ -107,6 +107,7 @@ FT_BEGIN_HEADER
cff_kind_string,
cff_kind_bool,
cff_kind_delta,
cff_kind_delta_fixed,
cff_kind_callback,
cff_kind_blend,

72
src/cff/cfftoken.h
View File

@ -80,26 +80,26 @@
#undef CFFCODE
#define CFFCODE CFF_CODE_PRIVATE
CFF_FIELD_DELTA ( 6, blue_values, 14, "BlueValues" )
CFF_FIELD_DELTA ( 7, other_blues, 10, "OtherBlues" )
CFF_FIELD_DELTA ( 8, family_blues, 14, "FamilyBlues" )
CFF_FIELD_DELTA ( 9, family_other_blues, 10, "FamilyOtherBlues" )
CFF_FIELD_FIXED_1000( 0x109, blue_scale, "BlueScale" )
CFF_FIELD_NUM ( 0x10A, blue_shift, "BlueShift" )
CFF_FIELD_NUM ( 0x10B, blue_fuzz, "BlueFuzz" )
CFF_FIELD_NUM ( 10, standard_width, "StdHW" )
CFF_FIELD_NUM ( 11, standard_height, "StdVW" )
CFF_FIELD_DELTA ( 0x10C, snap_widths, 13, "StemSnapH" )
CFF_FIELD_DELTA ( 0x10D, snap_heights, 13, "StemSnapV" )
CFF_FIELD_BOOL ( 0x10E, force_bold, "ForceBold" )
CFF_FIELD_FIXED ( 0x10F, force_bold_threshold, "ForceBoldThreshold" )
CFF_FIELD_NUM ( 0x110, lenIV, "lenIV" )
CFF_FIELD_NUM ( 0x111, language_group, "LanguageGroup" )
CFF_FIELD_FIXED ( 0x112, expansion_factor, "ExpansionFactor" )
CFF_FIELD_NUM ( 0x113, initial_random_seed, "initialRandomSeed" )
CFF_FIELD_NUM ( 19, local_subrs_offset, "Subrs" )
CFF_FIELD_NUM ( 20, default_width, "defaultWidthX" )
CFF_FIELD_NUM ( 21, nominal_width, "nominalWidthX" )
CFF_FIELD_DELTA_FIXED( 6, blue_values, 14, "BlueValues" )
CFF_FIELD_DELTA_FIXED( 7, other_blues, 10, "OtherBlues" )
CFF_FIELD_DELTA_FIXED( 8, family_blues, 14, "FamilyBlues" )
CFF_FIELD_DELTA_FIXED( 9, family_other_blues, 10, "FamilyOtherBlues" )
CFF_FIELD_FIXED_1000 ( 0x109, blue_scale, "BlueScale" )
CFF_FIELD_NUM ( 0x10A, blue_shift, "BlueShift" )
CFF_FIELD_NUM ( 0x10B, blue_fuzz, "BlueFuzz" )
CFF_FIELD_NUM ( 10, standard_width, "StdHW" )
CFF_FIELD_NUM ( 11, standard_height, "StdVW" )
CFF_FIELD_DELTA ( 0x10C, snap_widths, 13, "StemSnapH" )
CFF_FIELD_DELTA ( 0x10D, snap_heights, 13, "StemSnapV" )
CFF_FIELD_BOOL ( 0x10E, force_bold, "ForceBold" )
CFF_FIELD_FIXED ( 0x10F, force_bold_threshold, "ForceBoldThreshold" )
CFF_FIELD_NUM ( 0x110, lenIV, "lenIV" )
CFF_FIELD_NUM ( 0x111, language_group, "LanguageGroup" )
CFF_FIELD_FIXED ( 0x112, expansion_factor, "ExpansionFactor" )
CFF_FIELD_NUM ( 0x113, initial_random_seed, "initialRandomSeed" )
CFF_FIELD_NUM ( 19, local_subrs_offset, "Subrs" )
CFF_FIELD_NUM ( 20, default_width, "defaultWidthX" )
CFF_FIELD_NUM ( 21, nominal_width, "nominalWidthX" )
#undef FT_STRUCTURE
@ -129,22 +129,22 @@
#undef CFFCODE
#define CFFCODE CFF2_CODE_PRIVATE
CFF_FIELD_DELTA ( 6, blue_values, 14, "BlueValues" )
CFF_FIELD_DELTA ( 7, other_blues, 10, "OtherBlues" )
CFF_FIELD_DELTA ( 8, family_blues, 14, "FamilyBlues" )
CFF_FIELD_DELTA ( 9, family_other_blues, 10, "FamilyOtherBlues" )
CFF_FIELD_FIXED_1000( 0x109, blue_scale, "BlueScale" )
CFF_FIELD_NUM ( 0x10A, blue_shift, "BlueShift" )
CFF_FIELD_NUM ( 0x10B, blue_fuzz, "BlueFuzz" )
CFF_FIELD_NUM ( 10, standard_width, "StdHW" )
CFF_FIELD_NUM ( 11, standard_height, "StdVW" )
CFF_FIELD_DELTA ( 0x10C, snap_widths, 13, "StemSnapH" )
CFF_FIELD_DELTA ( 0x10D, snap_heights, 13, "StemSnapV" )
CFF_FIELD_NUM ( 0x111, language_group, "LanguageGroup" )
CFF_FIELD_FIXED ( 0x112, expansion_factor, "ExpansionFactor" )
CFF_FIELD_CALLBACK ( 22, vsindex, "vsindex" )
CFF_FIELD_BLEND ( 23, "blend" )
CFF_FIELD_NUM ( 19, local_subrs_offset, "Subrs" )
CFF_FIELD_DELTA_FIXED( 6, blue_values, 14, "BlueValues" )
CFF_FIELD_DELTA_FIXED( 7, other_blues, 10, "OtherBlues" )
CFF_FIELD_DELTA_FIXED( 8, family_blues, 14, "FamilyBlues" )
CFF_FIELD_DELTA_FIXED( 9, family_other_blues, 10, "FamilyOtherBlues" )
CFF_FIELD_FIXED_1000 ( 0x109, blue_scale, "BlueScale" )
CFF_FIELD_NUM ( 0x10A, blue_shift, "BlueShift" )
CFF_FIELD_NUM ( 0x10B, blue_fuzz, "BlueFuzz" )
CFF_FIELD_NUM ( 10, standard_width, "StdHW" )
CFF_FIELD_NUM ( 11, standard_height, "StdVW" )
CFF_FIELD_DELTA ( 0x10C, snap_widths, 13, "StemSnapH" )
CFF_FIELD_DELTA ( 0x10D, snap_heights, 13, "StemSnapV" )
CFF_FIELD_NUM ( 0x111, language_group, "LanguageGroup" )
CFF_FIELD_FIXED ( 0x112, expansion_factor, "ExpansionFactor" )
CFF_FIELD_CALLBACK ( 22, vsindex, "vsindex" )
CFF_FIELD_BLEND ( 23, "blend" )
CFF_FIELD_NUM ( 19, local_subrs_offset, "Subrs" )
/* END */

48
src/psaux/psblues.c
View File

@ -54,14 +54,6 @@
#define FT_COMPONENT cf2blues
/*
* For blue values, the FreeType parser produces an array of integers,
* while the Adobe CFF engine produces an array of fixed.
* Define a macro to convert FreeType to fixed.
*/
#define cf2_blueToFixed( x ) cf2_intToFixed( x )
FT_LOCAL_DEF( void )
cf2_blues_init( CF2_Blues blues,
CF2_Font font )
@ -78,10 +70,10 @@
size_t numFamilyBlues;
size_t numFamilyOtherBlues;
FT_Pos* blueValues;
FT_Pos* otherBlues;
FT_Pos* familyBlues;
FT_Pos* familyOtherBlues;
FT_Fixed* blueValues;
FT_Fixed* otherBlues;
FT_Fixed* familyBlues;
FT_Fixed* familyOtherBlues;
size_t i;
CF2_Fixed emBoxBottom, emBoxTop;
@ -138,13 +130,13 @@
emBoxTop = CF2_ICF_Top;
}
if ( cf2_getLanguageGroup( decoder ) == 1 &&
( numBlueValues == 0 ||
( numBlueValues == 4 &&
cf2_blueToFixed( blueValues[0] ) < emBoxBottom &&
cf2_blueToFixed( blueValues[1] ) < emBoxBottom &&
cf2_blueToFixed( blueValues[2] ) > emBoxTop &&
cf2_blueToFixed( blueValues[3] ) > emBoxTop ) ) )
if ( cf2_getLanguageGroup( decoder ) == 1 &&
( numBlueValues == 0 ||
( numBlueValues == 4 &&
blueValues[0] < emBoxBottom &&
blueValues[1] < emBoxBottom &&
blueValues[2] > emBoxTop &&
blueValues[3] > emBoxTop ) ) )
{
/*
* Construct hint edges suitable for synthetic ghost hints at top
@ -189,10 +181,8 @@
/* bottom zones */
for ( i = 0; i < numBlueValues; i += 2 )
{
blues->zone[blues->count].csBottomEdge =
cf2_blueToFixed( blueValues[i] );
blues->zone[blues->count].csTopEdge =
cf2_blueToFixed( blueValues[i + 1] );
blues->zone[blues->count].csBottomEdge = blueValues[i];
blues->zone[blues->count].csTopEdge = blueValues[i + 1];
zoneHeight = SUB_INT32( blues->zone[blues->count].csTopEdge,
blues->zone[blues->count].csBottomEdge );
@ -238,10 +228,8 @@
for ( i = 0; i < numOtherBlues; i += 2 )
{
blues->zone[blues->count].csBottomEdge =
cf2_blueToFixed( otherBlues[i] );
blues->zone[blues->count].csTopEdge =
cf2_blueToFixed( otherBlues[i + 1] );
blues->zone[blues->count].csBottomEdge = otherBlues[i];
blues->zone[blues->count].csTopEdge = otherBlues[i + 1];
zoneHeight = SUB_INT32( blues->zone[blues->count].csTopEdge,
blues->zone[blues->count].csBottomEdge );
@ -299,7 +287,7 @@
for ( j = 0; j < numFamilyOtherBlues; j += 2 )
{
/* top edge */
flatFamilyEdge = cf2_blueToFixed( familyOtherBlues[j + 1] );
flatFamilyEdge = familyOtherBlues[j + 1];
diff = cf2_fixedAbs( SUB_INT32( flatEdge, flatFamilyEdge ) );
@ -317,7 +305,7 @@
if ( numFamilyBlues >= 2 )
{
/* top edge */
flatFamilyEdge = cf2_blueToFixed( familyBlues[1] );
flatFamilyEdge = familyBlues[1];
diff = cf2_fixedAbs( SUB_INT32( flatEdge, flatFamilyEdge ) );
@ -337,7 +325,7 @@
for ( j = 2; j < numFamilyBlues; j += 2 )
{
/* bottom edge */
flatFamilyEdge = cf2_blueToFixed( familyBlues[j] );
flatFamilyEdge = familyBlues[j];
/* adjust edges of top zone upward by twice darkening amount */
flatFamilyEdge += 2 * font->darkenY; /* bottom edge */

16
src/psaux/psft.c
View File

@ -566,12 +566,12 @@
FT_LOCAL_DEF( void )
cf2_getBlueValues( PS_Decoder* decoder,
size_t* count,
FT_Pos* *data )
FT_Fixed* *data )
{
FT_ASSERT( decoder && decoder->current_subfont );
*count = decoder->current_subfont->private_dict.num_blue_values;
*data = (FT_Pos*)
*data = (FT_Fixed*)
&decoder->current_subfont->private_dict.blue_values;
}
@ -579,12 +579,12 @@
FT_LOCAL_DEF( void )
cf2_getOtherBlues( PS_Decoder* decoder,
size_t* count,
FT_Pos* *data )
FT_Fixed* *data )
{
FT_ASSERT( decoder && decoder->current_subfont );
*count = decoder->current_subfont->private_dict.num_other_blues;
*data = (FT_Pos*)
*data = (FT_Fixed*)
&decoder->current_subfont->private_dict.other_blues;
}
@ -592,12 +592,12 @@
FT_LOCAL_DEF( void )
cf2_getFamilyBlues( PS_Decoder* decoder,
size_t* count,
FT_Pos* *data )
FT_Fixed* *data )
{
FT_ASSERT( decoder && decoder->current_subfont );
*count = decoder->current_subfont->private_dict.num_family_blues;
*data = (FT_Pos*)
*data = (FT_Fixed*)
&decoder->current_subfont->private_dict.family_blues;
}
@ -605,12 +605,12 @@
FT_LOCAL_DEF( void )
cf2_getFamilyOtherBlues( PS_Decoder* decoder,
size_t* count,
FT_Pos* *data )
FT_Fixed* *data )
{
FT_ASSERT( decoder && decoder->current_subfont );
*count = decoder->current_subfont->private_dict.num_family_other_blues;
*data = (FT_Pos*)
*data = (FT_Fixed*)
&decoder->current_subfont->private_dict.family_other_blues;
}

8
src/psaux/psft.h
View File

@ -92,19 +92,19 @@ FT_BEGIN_HEADER
FT_LOCAL( void )
cf2_getBlueValues( PS_Decoder* decoder,
size_t* count,
FT_Pos* *data );
FT_Fixed* *data );
FT_LOCAL( void )
cf2_getOtherBlues( PS_Decoder* decoder,
size_t* count,
FT_Pos* *data );
FT_Fixed* *data );
FT_LOCAL( void )
cf2_getFamilyBlues( PS_Decoder* decoder,
size_t* count,
FT_Pos* *data );
FT_Fixed* *data );
FT_LOCAL( void )
cf2_getFamilyOtherBlues( PS_Decoder* decoder,
size_t* count,
FT_Pos* *data );
FT_Fixed* *data );
FT_LOCAL( CF2_Int )
cf2_getLanguageGroup( PS_Decoder* decoder );

9
src/psaux/psobjs.c
View File

@ -2463,19 +2463,20 @@
count = cpriv->num_blue_values = priv->num_blue_values;
for ( n = 0; n < count; n++ )
cpriv->blue_values[n] = (FT_Pos)priv->blue_values[n];
cpriv->blue_values[n] = cf2_intToFixed( priv->blue_values[n] );
count = cpriv->num_other_blues = priv->num_other_blues;
for ( n = 0; n < count; n++ )
cpriv->other_blues[n] = (FT_Pos)priv->other_blues[n];
cpriv->other_blues[n] = cf2_intToFixed( priv->other_blues[n] );
count = cpriv->num_family_blues = priv->num_family_blues;
for ( n = 0; n < count; n++ )
cpriv->family_blues[n] = (FT_Pos)priv->family_blues[n];
cpriv->family_blues[n] = cf2_intToFixed( priv->family_blues[n] );
count = cpriv->num_family_other_blues = priv->num_family_other_blues;
for ( n = 0; n < count; n++ )
cpriv->family_other_blues[n] = (FT_Pos)priv->family_other_blues[n];
cpriv->family_other_blues[n] =
cf2_intToFixed( priv->family_other_blues[n] );
cpriv->blue_scale = priv->blue_scale;
cpriv->blue_shift = (FT_Pos)priv->blue_shift;