Commit 4717696c125a1db97fc5b6c6b889821d9eaea7c7
2017-03-02T21:42:14
[truetype] Split off designer/normalized conversion routines. * src/truetype/ttgxvar.c (TT_Set_Var_Design): Split off conversion code designer->normalized coordinates to... (ft_var_to_normalized): ... New function. (TT_Get_Var_Design): Split off conversion code normalized->designer coordinates to... (ft_var_to_design): ... New function.
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diff --git a/ChangeLog b/ChangeLog
index 7076a6e..d1003b3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,15 @@
-2017-02-23 Werner Lemberg <wl@gnu.org>
+2017-03-02 Werner Lemberg <wl@gnu.org>
+
+ [truetype] Split off designer/normalized conversion routines.
+
+ * src/truetype/ttgxvar.c (TT_Set_Var_Design): Split off conversion
+ code designer->normalized coordinates to...
+ (ft_var_to_normalized): ... New function.
+ (TT_Get_Var_Design): Split off conversion code normalized->designer
+ coordinates to...
+ (ft_var_to_design): ... New function.
+
+2017-02-28 Werner Lemberg <wl@gnu.org>
[sfnt] Further generalize `sfnt_get_ps_name'; report invalid data.
diff --git a/src/truetype/ttgxvar.c b/src/truetype/ttgxvar.c
index 6907775..22297df 100644
--- a/src/truetype/ttgxvar.c
+++ b/src/truetype/ttgxvar.c
@@ -1683,6 +1683,190 @@
}
+ /* convert from design coordinates to normalized coordinates */
+
+ static void
+ ft_var_to_normalized( TT_Face face,
+ FT_UInt num_coords,
+ FT_Fixed* coords,
+ FT_Fixed* normalized )
+ {
+ GX_Blend blend;
+ FT_MM_Var* mmvar;
+ FT_UInt i, j;
+ FT_Var_Axis* a;
+ GX_AVarSegment av;
+
+
+ blend = face->blend;
+ mmvar = blend->mmvar;
+
+ if ( num_coords > mmvar->num_axis )
+ {
+ FT_TRACE2(( "ft_var_to_normalized:"
+ " only using first %d of %d coordinates\n",
+ mmvar->num_axis, num_coords ));
+ num_coords = mmvar->num_axis;
+ }
+
+ /* Axis normalization is a two-stage process. First we normalize */
+ /* based on the [min,def,max] values for the axis to be [-1,0,1]. */
+ /* Then, if there's an `avar' table, we renormalize this range. */
+
+ FT_TRACE5(( "design coordinates:\n" ));
+
+ a = mmvar->axis;
+ for ( i = 0; i < num_coords; i++, a++ )
+ {
+ FT_Fixed coord = coords[i];
+
+
+ FT_TRACE5(( " %.5f\n", coord / 65536.0 ));
+ if ( coord > a->maximum || coord < a->minimum )
+ {
+ FT_TRACE1((
+ "ft_var_to_normalized: design coordinate %.5f\n"
+ " is out of range [%.5f;%.5f]; clamping\n",
+ coord / 65536.0,
+ a->minimum / 65536.0,
+ a->maximum / 65536.0 ));
+
+ if ( coord > a->maximum)
+ coord = a->maximum;
+ else
+ coord = a->minimum;
+ }
+
+ if ( coord < a->def )
+ normalized[i] = -FT_DivFix( coords[i] - a->def,
+ a->minimum - a->def );
+ else if ( coord > a->def )
+ normalized[i] = FT_DivFix( coords[i] - a->def,
+ a->maximum - a->def );
+ else
+ normalized[i] = 0;
+ }
+
+ FT_TRACE5(( "\n" ));
+
+ for ( ; i < mmvar->num_axis; i++ )
+ normalized[i] = 0;
+
+ if ( blend->avar_segment )
+ {
+ FT_TRACE5(( "normalized design coordinates"
+ " before applying `avar' data:\n" ));
+
+ av = blend->avar_segment;
+ for ( i = 0; i < mmvar->num_axis; i++, av++ )
+ {
+ for ( j = 1; j < (FT_UInt)av->pairCount; j++ )
+ {
+ if ( normalized[i] < av->correspondence[j].fromCoord )
+ {
+ FT_TRACE5(( " %.5f\n", normalized[i] / 65536.0 ));
+
+ normalized[i] =
+ FT_MulDiv( normalized[i] - av->correspondence[j - 1].fromCoord,
+ av->correspondence[j].toCoord -
+ av->correspondence[j - 1].toCoord,
+ av->correspondence[j].fromCoord -
+ av->correspondence[j - 1].fromCoord ) +
+ av->correspondence[j - 1].toCoord;
+ break;
+ }
+ }
+ }
+ }
+ }
+
+
+ /* convert from normalized coordinates to design coordinates */
+
+ static void
+ ft_var_to_design( TT_Face face,
+ FT_UInt num_coords,
+ FT_Fixed* coords,
+ FT_Fixed* design )
+ {
+ GX_Blend blend;
+ FT_MM_Var* mmvar;
+ FT_Var_Axis* a;
+
+ FT_UInt i, j, nc;
+
+
+ blend = face->blend;
+
+ nc = num_coords;
+ if ( num_coords > blend->num_axis )
+ {
+ FT_TRACE2(( "ft_var_to_design:"
+ " only using first %d of %d coordinates\n",
+ blend->num_axis, num_coords ));
+ nc = blend->num_axis;
+ }
+
+ if ( face->doblend )
+ {
+ for ( i = 0; i < nc; i++ )
+ design[i] = coords[i];
+ }
+ else
+ {
+ for ( i = 0; i < nc; i++ )
+ design[i] = 0;
+ }
+
+ for ( ; i < num_coords; i++ )
+ design[i] = 0;
+
+ if ( blend->avar_segment )
+ {
+ GX_AVarSegment av = blend->avar_segment;
+
+
+ FT_TRACE5(( "design coordinates"
+ " after removing `avar' distortion:\n" ));
+
+ for ( i = 0; i < nc; i++, av++ )
+ {
+ for ( j = 1; j < (FT_UInt)av->pairCount; j++ )
+ {
+ if ( design[i] < av->correspondence[j].toCoord )
+ {
+ design[i] =
+ FT_MulDiv( design[i] - av->correspondence[j - 1].toCoord,
+ av->correspondence[j].fromCoord -
+ av->correspondence[j - 1].fromCoord,
+ av->correspondence[j].toCoord -
+ av->correspondence[j - 1].toCoord ) +
+ av->correspondence[j - 1].fromCoord;
+
+ FT_TRACE5(( " %.5f\n", design[i] / 65536.0 ));
+ break;
+ }
+ }
+ }
+ }
+
+ mmvar = blend->mmvar;
+ a = mmvar->axis;
+
+ for ( i = 0; i < nc; i++, a++ )
+ {
+ if ( design[i] < 0 )
+ design[i] = a->def + FT_MulFix( design[i],
+ a->def - a->minimum );
+ else if ( design[i] > 0 )
+ design[i] = a->def + FT_MulFix( design[i],
+ a->maximum - a->def );
+ else
+ design[i] = a->def;
+ }
+ }
+
+
/*************************************************************************/
/*************************************************************************/
/***** *****/
@@ -2262,14 +2446,11 @@
FT_UInt num_coords,
FT_Fixed* coords )
{
- FT_Error error = FT_Err_Ok;
- FT_Fixed* normalized = NULL;
- GX_Blend blend;
- FT_MM_Var* mmvar;
- FT_UInt i, j;
- FT_Var_Axis* a;
- GX_AVarSegment av;
- FT_Memory memory = face->root.memory;
+ FT_Error error = FT_Err_Ok;
+ FT_Memory memory = face->root.memory;
+
+ FT_Fixed* normalized = NULL;
+ FT_UInt num_axes;
if ( !face->blend )
@@ -2278,94 +2459,17 @@
goto Exit;
}
- blend = face->blend;
- mmvar = blend->mmvar;
-
- if ( num_coords > mmvar->num_axis )
- {
- FT_TRACE2(( "TT_Set_Var_Design:"
- " only using first %d of %d coordinates\n",
- mmvar->num_axis, num_coords ));
- num_coords = mmvar->num_axis;
- }
-
- /* Axis normalization is a two-stage process. First we normalize */
- /* based on the [min,def,max] values for the axis to be [-1,0,1]. */
- /* Then, if there's an `avar' table, we renormalize this range. */
+ num_axes = face->blend->mmvar->num_axis;
- if ( FT_NEW_ARRAY( normalized, mmvar->num_axis ) )
+ if ( FT_NEW_ARRAY( normalized, num_axes ) )
goto Exit;
- FT_TRACE5(( "design coordinates:\n" ));
-
- a = mmvar->axis;
- for ( i = 0; i < num_coords; i++, a++ )
- {
- FT_Fixed coord = coords[i];
-
-
- FT_TRACE5(( " %.5f\n", coord / 65536.0 ));
- if ( coord > a->maximum || coord < a->minimum )
- {
- FT_TRACE1((
- "TT_Set_Var_Design: design coordinate %.5f\n"
- " is out of range [%.5f;%.5f]; clamping\n",
- coord / 65536.0,
- a->minimum / 65536.0,
- a->maximum / 65536.0 ));
-
- if ( coord > a->maximum)
- coord = a->maximum;
- else
- coord = a->minimum;
- }
-
- if ( coord < a->def )
- normalized[i] = -FT_DivFix( coords[i] - a->def,
- a->minimum - a->def );
- else if ( coord > a->def )
- normalized[i] = FT_DivFix( coords[i] - a->def,
- a->maximum - a->def );
- else
- normalized[i] = 0;
- }
-
- FT_TRACE5(( "\n" ));
-
- for ( ; i < mmvar->num_axis; i++ )
- normalized[i] = 0;
-
- if ( !blend->avar_checked )
+ if ( !face->blend->avar_checked )
ft_var_load_avar( face );
- if ( blend->avar_segment )
- {
- FT_TRACE5(( "normalized design coordinates"
- " before applying `avar' data:\n" ));
-
- av = blend->avar_segment;
- for ( i = 0; i < mmvar->num_axis; i++, av++ )
- {
- for ( j = 1; j < (FT_UInt)av->pairCount; j++ )
- {
- if ( normalized[i] < av->correspondence[j].fromCoord )
- {
- FT_TRACE5(( " %.5f\n", normalized[i] / 65536.0 ));
-
- normalized[i] =
- FT_MulDiv( normalized[i] - av->correspondence[j - 1].fromCoord,
- av->correspondence[j].toCoord -
- av->correspondence[j - 1].toCoord,
- av->correspondence[j].fromCoord -
- av->correspondence[j - 1].fromCoord ) +
- av->correspondence[j - 1].toCoord;
- break;
- }
- }
- }
- }
+ ft_var_to_normalized( face, num_coords, coords, normalized );
- error = TT_Set_MM_Blend( face, mmvar->num_axis, normalized );
+ error = TT_Set_MM_Blend( face, num_axes, normalized );
Exit:
FT_FREE( normalized );
@@ -2402,12 +2506,6 @@
{
FT_Error error = FT_Err_Ok;
- GX_Blend blend;
- FT_MM_Var* mmvar;
- FT_Var_Axis* a;
-
- FT_UInt i, j, nc;
-
if ( !face->blend )
{
@@ -2415,76 +2513,13 @@
return error;
}
- blend = face->blend;
-
- nc = num_coords;
- if ( num_coords > blend->num_axis )
- {
- FT_TRACE2(( "TT_Get_Var_Design: only using first %d of %d coordinates\n",
- blend->num_axis, num_coords ));
- nc = blend->num_axis;
- }
-
- if ( face->doblend )
- {
- for ( i = 0; i < nc; i++ )
- coords[i] = blend->normalizedcoords[i];
- }
- else
- {
- for ( i = 0; i < nc; i++ )
- coords[i] = 0;
- }
-
- for ( ; i < num_coords; i++ )
- coords[i] = 0;
-
- if ( !blend->avar_checked )
+ if ( !face->blend->avar_checked )
ft_var_load_avar( face );
- if ( blend->avar_segment )
- {
- GX_AVarSegment av = blend->avar_segment;
-
-
- FT_TRACE5(( "design coordinates"
- " after removing `avar' distortion:\n" ));
-
- for ( i = 0; i < nc; i++, av++ )
- {
- for ( j = 1; j < (FT_UInt)av->pairCount; j++ )
- {
- if ( coords[i] < av->correspondence[j].toCoord )
- {
- coords[i] =
- FT_MulDiv( coords[i] - av->correspondence[j - 1].toCoord,
- av->correspondence[j].fromCoord -
- av->correspondence[j - 1].fromCoord,
- av->correspondence[j].toCoord -
- av->correspondence[j - 1].toCoord ) +
- av->correspondence[j - 1].fromCoord;
-
- FT_TRACE5(( " %.5f\n", coords[i] / 65536.0 ));
- break;
- }
- }
- }
- }
-
- mmvar = blend->mmvar;
- a = mmvar->axis;
-
- for ( i = 0; i < nc; i++, a++ )
- {
- if ( coords[i] < 0 )
- coords[i] = a->def + FT_MulFix( coords[i],
- a->def - a->minimum );
- else if ( coords[i] > 0 )
- coords[i] = a->def + FT_MulFix( coords[i],
- a->maximum - a->def );
- else
- coords[i] = a->def;
- }
+ ft_var_to_design( face,
+ num_coords,
+ face->blend->normalizedcoords,
+ coords );
return FT_Err_Ok;
}