ref: 5aaabb44bcfe95f791008669bf5ef0ffdce5057c
parent: 9ef02bd41a42fb08355c83522331b9d0dab4d685
author: Alexei Podtelezhnikov <[email protected]>
date: Mon Jun 29 18:46:54 EDT 2015
[truetype] Speed up bytecode interpreter. * src/truetype/ttinterp.c (Normalize): Use `FT_Vector_NormLen'.
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
2015-06-29 Alexei Podtelezhnikov <[email protected]>
+ [truetype] Speed up bytecode interpreter.
+
+ * src/truetype/ttinterp.c (Normalize): Use `FT_Vector_NormLen'.
+
+2015-06-29 Alexei Podtelezhnikov <[email protected]>
+
[base] Speed up emboldening.
* src/base/ftoutln.c (FT_Outline_EmboldenXY): Use `FT_Vector_NormLen'.
--- a/src/truetype/ttinterp.c
+++ b/src/truetype/ttinterp.c
@@ -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;
}