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freetype2
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Code Issues 9 Releases Wiki Activity

[autofit] Speed up IUP. 

* src/autofit/afhints.c (af_iup_interp): Separate trivial snapping to
the same position from true interpolation, use `scale' to reduce divisions.
This commit is contained in:
Alexei Podtelezhnikov 2015-04-29 21:57:30 -04:00
parent 9178a1228f
commit 4091495271
2 changed files with 28 additions and 24 deletions
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8
ChangeLog
View File

@ -1,3 +1,11 @@
2015-04-29 Alexei Podtelezhnikov <apodtele@gmail.com>
[autofit] Speed up IUP.
* src/autofit/afhints.c (af_iup_interp): Separate trivial snapping to
the same position from true interpolation, use `scale' to reduce
divisions.
2015-04-28 Werner Lemberg <wl@gnu.org>
[cff] Use `name' table for PS name if we have a SFNT-CFF.

44
src/autofit/afhints.c
View File

@ -1292,33 +1292,27 @@
AF_Point ref2 )
{
AF_Point p;
FT_Pos u;
FT_Pos v1 = ref1->v;
FT_Pos v2 = ref2->v;
FT_Pos d1 = ref1->u - v1;
FT_Pos d2 = ref2->u - v2;
FT_Pos u, v1, v2, u1, u2, d1, d2;
if ( p1 > p2 )
return;
if ( v1 == v2 )
if ( ref1->v > ref2->v )
{
for ( p = p1; p <= p2; p++ )
{
u = p->v;
if ( u <= v1 )
u += d1;
else
u += d2;
p->u = u;
}
return;
p = ref1;
ref1 = ref2;
ref2 = p;
}
if ( v1 < v2 )
v1 = ref1->v;
v2 = ref2->v;
u1 = ref1->u;
u2 = ref2->u;
d1 = u1 - v1;
d2 = u2 - v2;
if ( u1 == u2 || v1 == v2 )
{
for ( p = p1; p <= p2; p++ )
{
@ -1329,23 +1323,25 @@
else if ( u >= v2 )
u += d2;
else
u = ref1->u + FT_MulDiv( u - v1, ref2->u - ref1->u, v2 - v1 );
u = u1;
p->u = u;
}
}
else
{
FT_Fixed scale = FT_DivFix( u2 - u1, v2 - v1 );
for ( p = p1; p <= p2; p++ )
{
u = p->v;
if ( u <= v2 )
u += d2;
else if ( u >= v1 )
if ( u <= v1 )
u += d1;
else if ( u >= v2 )
u += d2;
else
u = ref1->u + FT_MulDiv( u - v1, ref2->u - ref1->u, v2 - v1 );
u = u1 + FT_MulFix( u - v1, scale );
p->u = u;
}