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Speed up FT_Set_Var_{Design,Blend}_Coordinates if curr == new. 

We exit early if the current design or blend coordinates are
identical to the new ones.

* src/truetype/ttgxvar.c (tt_set_mm_blend, TT_Set_Var_Design):
Implement it, returning internal error code -1 if there will be no
variation change.

* src/type1/t1load.c (t1_set_mm_blend): Ditto.

* src/base/ftmm.c (FT_Set_Var_Design_Coordinates,
FT_Set_MM_Blend_Coordinates, FT_Set_Var_Blend_Coordinates): Updated.
This commit is contained in:
Werner Lemberg 2017-12-20 22:06:19 +01:00
parent 0579d545af
commit 08cd62deed
5 changed files with 105 additions and 12 deletions
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16
ChangeLog
View File

@ -1,3 +1,19 @@
2017-12-20 Werner Lemberg <wl@gnu.org>
Speed up FT_Set_Var_{Design,Blend}_Coordinates if curr == new.
We exit early if the current design or blend coordinates are
identical to the new ones.
* src/truetype/ttgxvar.c (tt_set_mm_blend, TT_Set_Var_Design):
Implement it, returning internal error code -1 if there will be no
variation change.
* src/type1/t1load.c (t1_set_mm_blend): Ditto.
* src/base/ftmm.c (FT_Set_Var_Design_Coordinates,
FT_Set_MM_Blend_Coordinates, FT_Set_Var_Blend_Coordinates): Updated.
2017-12-18 Werner Lemberg <wl@gnu.org>
[sfnt] Fix charmap type 2 iterator (#52646).

4
include/freetype/internal/services/svmm.h
View File

@ -48,11 +48,15 @@ FT_BEGIN_HEADER
FT_UInt num_coords,
FT_Long* coords );
/* use return value -1 to indicate that the new coordinates */
/* are equal to the current ones; no changes are thus needed */
typedef FT_Error
(*FT_Set_Var_Design_Func)( FT_Face face,
FT_UInt num_coords,
FT_Fixed* coords );
/* use return value -1 to indicate that the new coordinates */
/* are equal to the current ones; no changes are thus needed */
typedef FT_Error
(*FT_Set_MM_Blend_Func)( FT_Face face,
FT_UInt num_coords,

12
src/base/ftmm.c
View File

@ -203,6 +203,10 @@
error = FT_ERR( Invalid_Argument );
if ( service_mm->set_var_design )
error = service_mm->set_var_design( face, num_coords, coords );
/* internal error code -1 means `no change'; we can exit immediately */
if ( error == -1 )
return FT_Err_Ok;
}
if ( !error )
@ -275,6 +279,10 @@
error = FT_ERR( Invalid_Argument );
if ( service_mm->set_mm_blend )
error = service_mm->set_mm_blend( face, num_coords, coords );
/* internal error code -1 means `no change'; we can exit immediately */
if ( error == -1 )
return FT_Err_Ok;
}
if ( !error )
@ -322,6 +330,10 @@
error = FT_ERR( Invalid_Argument );
if ( service_mm->set_mm_blend )
error = service_mm->set_mm_blend( face, num_coords, coords );
/* internal error code -1 means `no change'; we can exit immediately */
if ( error == -1 )
return FT_Err_Ok;
}
if ( !error )

73
src/truetype/ttgxvar.c
View File

@ -2432,6 +2432,12 @@
}
else
{
FT_Bool have_diff = 0;
FT_UInt j;
FT_Fixed* c;
FT_Fixed* n;
manageCvt = mcvt_retain;
for ( i = 0; i < num_coords; i++ )
@ -2439,10 +2445,34 @@
if ( blend->normalizedcoords[i] != coords[i] )
{
manageCvt = mcvt_load;
have_diff = 1;
break;
}
}
if ( FT_IS_NAMED_INSTANCE( FT_FACE( face ) ) )
{
FT_UInt idx = (FT_UInt)face->root.face_index >> 16;
c = blend->normalizedcoords + i;
n = blend->normalized_stylecoords + idx * mmvar->num_axis + i;
for ( j = i; j < mmvar->num_axis; j++, n++, c++ )
if ( *c != *n )
have_diff = 1;
}
else
{
c = blend->normalizedcoords + i;
for ( j = i; j < mmvar->num_axis; j++, c++ )
if ( *c != 0 )
have_diff = 1;
}
/* return value -1 indicates `no change' */
if ( !have_diff )
return -1;
for ( ; i < mmvar->num_axis; i++ )
{
if ( blend->normalizedcoords[i] != 0 )
@ -2664,8 +2694,11 @@
FT_Memory memory = face->root.memory;
FT_Fixed* c;
FT_Fixed* n;
FT_Fixed* normalized = NULL;
FT_Bool have_diff = 0;
if ( !face->blend )
{
@ -2690,25 +2723,35 @@
goto Exit;
}
FT_MEM_COPY( blend->coords,
coords,
num_coords * sizeof ( FT_Fixed ) );
c = blend->coords + num_coords;
c = blend->coords;
n = coords;
for ( i = 0; i < num_coords; i++, n++, c++ )
{
if ( *c != *n )
{
*c = *n;
have_diff = 1;
}
}
if ( FT_IS_NAMED_INSTANCE( FT_FACE( face ) ) )
{
FT_UInt instance_index;
FT_Var_Named_Style* named_style;
FT_Fixed* n;
instance_index = (FT_UInt)face->root.face_index >> 16;
named_style = mmvar->namedstyle + instance_index - 1;
n = named_style->coords + num_coords;
for ( i = num_coords; i < mmvar->num_axis; i++, n++, c++ )
*c = *n;
for ( ; i < mmvar->num_axis; i++, n++, c++ )
{
if ( *c != *n )
{
*c = *n;
have_diff = 1;
}
}
}
else
{
@ -2716,10 +2759,20 @@
a = mmvar->axis + num_coords;
for ( i = num_coords; i < mmvar->num_axis; i++, a++, c++ )
*c = a->def;
for ( ; i < mmvar->num_axis; i++, a++, c++ )
{
if ( *c != a->def )
{
*c = a->def;
have_diff = 1;
}
}
}
/* return value -1 indicates `no change' */
if ( !have_diff )
return -1;
if ( FT_NEW_ARRAY( normalized, mmvar->num_axis ) )
goto Exit;

12
src/type1/t1load.c
View File

@ -374,6 +374,8 @@
PS_Blend blend = face->blend;
FT_UInt n, m;
FT_Bool have_diff = 0;
if ( !blend )
return FT_THROW( Invalid_Argument );
@ -405,10 +407,16 @@
result = FT_MulFix( result, factor );
}
blend->weight_vector[n] = result;
if ( blend->weight_vector[n] != result )
{
blend->weight_vector[n] = result;
have_diff = 1;
}
}
return FT_Err_Ok;
/* return value -1 indicates `no change' */
return have_diff ? FT_Err_Ok : -1;
}