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* src/type1/t1load.c (mm_axis_unmap, mm_weights_unmap): New 

auxiliary functions.
(T1_Get_MM_Var): Provide axis tags.
Use mm_axis_unmap and mm_weights_unmap to provide default values
for design and normalized axis coordinates.

* include/freetype/t1tables.h (PS_DesignMapRec): Change type of
`design_points' to FT_Long.
Update all users.
This commit is contained in:
Werner Lemberg 2004-05-20 09:21:19 +00:00
parent 6b75f163ed
commit 3ea8eccf8d
4 changed files with 118 additions and 6 deletions
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12
ChangeLog
View File

@ -1,3 +1,15 @@
2004-05-19 George Williams <gww@silcom.com>
* src/type1/t1load.c (mm_axis_unmap, mm_weights_unmap): New
auxiliary functions.
(T1_Get_MM_Var): Provide axis tags.
Use mm_axis_unmap and mm_weights_unmap to provide default values
for design and normalized axis coordinates.
* include/freetype/t1tables.h (PS_DesignMapRec): Change type of
`design_points' to FT_Long.
Update all users.
2004-05-17 Werner Lemberg <wl@gnu.org>
* src/base/ftbbox.c (BBox_Conic_Check): Fix boundary cases.

5
include/freetype/ftmm.h
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@ -125,12 +125,13 @@ FT_BEGIN_HEADER
/* minimum :: The axis's minimum design coordinate. */
/* */
/* def :: The axis's default design coordinate. */
/* Not meaningful for MM. */
/* FreeType computes meaningful default values for MM; it */
/* is then an integer value, not in 16.16 format. */
/* */
/* maximum :: The axis's maximum design coordinate. */
/* */
/* tag :: The axis's tag (the GX equivalent to `name'). */
/* Not meaningful for MM. */
/* FreeType provides default values for MM if possible. */
/* */
/* strid :: The entry in `name' table (another GX version of */
/* `name'). */

2
include/freetype/t1tables.h
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@ -226,7 +226,7 @@ FT_BEGIN_HEADER
typedef struct PS_DesignMap_
{
FT_Byte num_points;
FT_Fixed* design_points;
FT_Long* design_points;
FT_Fixed* blend_points;
} PS_DesignMapRec, *PS_DesignMap;

105
src/type1/t1load.c
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@ -215,6 +215,85 @@
#define FT_FIXED_TO_INT( a ) ( FT_RoundFix( a ) >> 16 )
/*************************************************************************/
/* */
/* Given a normalized (blend) coordinate, figure out the design */
/* coordinate appropriate for that value. */
/* */
FT_LOCAL_DEF( FT_Fixed )
mm_axis_unmap( PS_DesignMap axismap,
FT_Fixed ncv )
{
int j;
if ( ncv <= axismap->blend_points[0] )
return axismap->design_points[0];
for ( j = 1; j < axismap->num_points; ++j )
{
if ( ncv <= axismap->blend_points[j] )
{
FT_Fixed t = FT_MulDiv( ncv - axismap->blend_points[j - 1],
0x10000L,
axismap->blend_points[j] -
axismap->blend_points[j - 1] );
return axismap->design_points[j - 1] +
FT_MulDiv( t,
axismap->design_points[j] -
axismap->design_points[j - 1],
1L );
}
}
return axismap->design_points[axismap->num_points - 1];
}
/*************************************************************************/
/* */
/* Given a vector of weights, one for each design, figure out the */
/* normalized axis coordinates which gave rise to those weights. */
/* */
FT_LOCAL_DEF( void )
mm_weights_unmap( FT_Fixed* weights,
FT_Fixed* axiscoords,
FT_UInt axis_count )
{
FT_ASSERT( axis_count <= T1_MAX_MM_AXIS );
if ( axis_count == 1 )
axiscoords[0] = weights[1];
else if ( axis_count == 2 )
{
axiscoords[0] = weights[3] + weights[1];
axiscoords[1] = weights[3] + weights[2];
}
else if ( axis_count == 3 )
{
axiscoords[0] = weights[7] + weights[5] + weights[3] + weights[1];
axiscoords[1] = weights[7] + weights[6] + weights[3] + weights[2];
axiscoords[2] = weights[7] + weights[6] + weights[5] + weights[4];
}
else
{
axiscoords[0] = weights[15] + weights[13] + weights[11] + weights[9] +
weights[7] + weights[5] + weights[3] + weights[1];
axiscoords[1] = weights[15] + weights[14] + weights[11] + weights[10] +
weights[7] + weights[6] + weights[3] + weights[2];
axiscoords[2] = weights[15] + weights[14] + weights[13] + weights[12] +
weights[7] + weights[6] + weights[5] + weights[4];
axiscoords[3] = weights[15] + weights[14] + weights[13] + weights[12] +
weights[11] + weights[10] + weights[9] + weights[8];
}
}
/*************************************************************************/
/* */
/* Just a wrapper around T1_Get_Multi_Master to support the different */
@ -229,6 +308,8 @@
FT_Multi_Master mmaster;
FT_Error error;
FT_UInt i;
FT_Fixed axiscoords[T1_MAX_MM_AXIS];
PS_Blend blend = face->blend;
error = T1_Get_Multi_Master( face, &mmaster );
@ -254,8 +335,26 @@
mmvar->axis[i].def = ( mmvar->axis[i].minimum +
mmvar->axis[i].maximum ) / 2;
/* Does not apply. But this value is in range */
mmvar->axis[i].tag = 0xFFFFFFFFLU; /* Does not apply */
mmvar->axis[i].strid = 0xFFFFFFFFLU; /* Does not apply */
mmvar->axis[i].tag = 0xFFFFFFFFLU; /* Does not apply */
if ( ft_strcmp( mmvar->axis[i].name, "Weight" ) == 0 )
mmvar->axis[i].tag = FT_MAKE_TAG( 'w', 'g', 'h', 't' );
else if ( ft_strcmp( mmvar->axis[i].name, "Width" ) == 0 )
mmvar->axis[i].tag = FT_MAKE_TAG( 'w', 'd', 't', 'h' );
else if ( ft_strcmp( mmvar->axis[i].name, "OpticalSize" ) == 0 )
mmvar->axis[i].tag = FT_MAKE_TAG( 'o', 'p', 's', 'z' );
}
if ( blend->num_designs == 1U << blend->num_axis )
{
mm_weights_unmap( blend->default_weight_vector,
axiscoords,
blend->num_axis );
for ( i = 0; i < mmaster.num_axis; ++i )
mmvar->axis[i].def = mm_axis_unmap( &blend->design_map[i],
axiscoords[i] );
}
*master = mmvar;
@ -334,14 +433,14 @@
FT_Long design = coords[n];
FT_Fixed the_blend;
PS_DesignMap map = blend->design_map + n;
FT_Fixed* designs = map->design_points;
FT_Long* designs = map->design_points;
FT_Fixed* blends = map->blend_points;
FT_Int before = -1, after = -1;
for ( p = 0; p < (FT_UInt)map->num_points; p++ )
{
FT_Fixed p_design = designs[p];
FT_Long p_design = designs[p];
/* exact match? */