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[truetype] Speed up bytecode interpreter. 

* src/truetype/ttinterp.c (Normalize): Use `FT_Vector_NormLen'.
This commit is contained in:
Alexei Podtelezhnikov 2015-06-29 22:46:54 -04:00
parent 9ef02bd41a
commit 5aaabb44bc
2 changed files with 17 additions and 21 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2015-06-29 Alexei Podtelezhnikov <apodtele@gmail.com>
[truetype] Speed up bytecode interpreter.
* src/truetype/ttinterp.c (Normalize): Use `FT_Vector_NormLen'.
2015-06-29 Alexei Podtelezhnikov <apodtele@gmail.com>
[base] Speed up emboldening.

32
src/truetype/ttinterp.c
View File

@ -88,13 +88,6 @@
#define BOUNDSL( x, n ) ( (FT_ULong)(x) >= (FT_ULong)(n) )
/*************************************************************************/
/* */
/* This macro computes (a*2^14)/b and complements TT_MulFix14. */
/* */
#define TT_DivFix14( a, b ) FT_DivFix( a, (b) << 2 )
#undef SUCCESS
#define SUCCESS 0
@ -2580,26 +2573,23 @@
FT_F26Dot6 Vy,
FT_UnitVector* R )
{
FT_F26Dot6 W;
FT_Vector V;
if ( FT_ABS( Vx ) < 0x4000L && FT_ABS( Vy ) < 0x4000L )
if ( Vx == 0 && Vy == 0 )
{
if ( Vx == 0 && Vy == 0 )
{
/* XXX: UNDOCUMENTED! It seems that it is possible to try */
/* to normalize the vector (0,0). Return immediately. */
return SUCCESS;
}
Vx *= 0x4000;
Vy *= 0x4000;
/* XXX: UNDOCUMENTED! It seems that it is possible to try */
/* to normalize the vector (0,0). Return immediately. */
return SUCCESS;
}
W = FT_Hypot( Vx, Vy );
V.x = Vx;
V.y = Vy;
R->x = (FT_F2Dot14)TT_DivFix14( Vx, W );
R->y = (FT_F2Dot14)TT_DivFix14( Vy, W );
FT_Vector_NormLen( &V );
R->x = (FT_F2Dot14)( V.x / 4 );
R->y = (FT_F2Dot14)( V.y / 4 );
return SUCCESS;
}