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-rw-r--r--ChangeLog18
-rw-r--r--include/freetype/config/ftoption.h12
-rw-r--r--include/freetype/internal/ftcalc.h153
-rw-r--r--src/base/ftcalc.c160
-rw-r--r--src/base/fttrigon.c6
-rw-r--r--src/truetype/ttinterp.c259
6 files changed, 204 insertions, 404 deletions
diff --git a/ChangeLog b/ChangeLog
index e345804fc..015aead33 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,21 @@
+2002-03-25 David Turner <david@freetype.org>
+
+ * src/base/fttrigon.c, src/truetype/ttinterp.c: fixing the TrueType
+ bytecode interpreter to compute the same values than FreeType 1.
+
+ The difference came from distinct algorithm for computing the
+ dot product and vector lengths. It seems that TT bytecode
+ interpretation is _extremely_ sensitive to rounding 'errors'
+ of fixed-point arithmetic..
+
+ * include/freetype/config/ftoption.h,
+ include/freetype/internal/ftcalc.h,
+ src/base/ftcalc.c:
+
+ gettting rid of the now obsolete FT_CONFIG_OPTION_OLD_CALCS
+ macro
+
+
2002-03-15 Werner Lemberg <wl@gnu.org>
* builds/win32/visualc/{freetype.dsp,index.html}: Update to 2.0.9.
diff --git a/include/freetype/config/ftoption.h b/include/freetype/config/ftoption.h
index 506663b2e..6f0c5b4be 100644
--- a/include/freetype/config/ftoption.h
+++ b/include/freetype/config/ftoption.h
@@ -270,16 +270,6 @@ FT_BEGIN_HEADER
/*************************************************************************/
/* */
- /* Computation Algorithms */
- /* */
- /* Used for debugging, this configuration macro should disappear */
- /* soon. */
- /* */
-#undef FT_CONFIG_OPTION_OLD_CALCS
-
-
- /*************************************************************************/
- /* */
/* The size in bytes of the render pool used by the scan-line converter */
/* to do all of its work. */
/* */
@@ -375,7 +365,7 @@ FT_BEGIN_HEADER
/* By undefining this, you will only compile the code necessary to load */
/* TrueType glyphs without hinting. */
/* */
-#undef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
+#define TT_CONFIG_OPTION_BYTECODE_INTERPRETER
/*************************************************************************/
diff --git a/include/freetype/internal/ftcalc.h b/include/freetype/internal/ftcalc.h
index 4cdf40fb1..f03f5962f 100644
--- a/include/freetype/internal/ftcalc.h
+++ b/include/freetype/internal/ftcalc.h
@@ -29,161 +29,10 @@ FT_BEGIN_HEADER
/* OLD 64-bits internal API */
-#ifdef FT_CONFIG_OPTION_OLD_CALCS
-
-#ifdef FT_LONG64
-
- typedef FT_INT64 FT_Int64;
-
-#define ADD_64( x, y, z ) z = (x) + (y)
-#define MUL_64( x, y, z ) z = (FT_Int64)(x) * (y)
-#define DIV_64( x, y ) ( (x) / (y) )
-
-#define SQRT_64( z ) FT_Sqrt64( z )
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* FT_Sqrt64 */
- /* */
- /* <Description> */
- /* Computes the square root of a 64-bit value. That sounds stupid, */
- /* but it is needed to obtain maximal accuracy in the TrueType */
- /* bytecode interpreter. */
- /* */
- /* <Input> */
- /* l :: A 64-bit integer. */
- /* */
- /* <Return> */
- /* The 32-bit square-root. */
- /* */
- FT_EXPORT( FT_Int32 )
- FT_Sqrt64( FT_Int64 l );
-
-
-#else /* !FT_LONG64 */
-
-
- typedef struct FT_Int64_
- {
- FT_UInt32 lo;
- FT_UInt32 hi;
-
- } FT_Int64;
-
-
-#define ADD_64( x, y, z ) FT_Add64( &x, &y, &z )
-#define MUL_64( x, y, z ) FT_MulTo64( x, y, &z )
-#define DIV_64( x, y ) FT_Div64by32( &x, y )
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* FT_Add64 */
- /* */
- /* <Description> */
- /* Add two Int64 values. */
- /* */
- /* <Input> */
- /* x :: A pointer to the first value to be added. */
- /* y :: A pointer to the second value to be added. */
- /* */
- /* <Output> */
- /* z :: A pointer to the result of `x + y'. */
- /* */
- /* <Note> */
- /* Will be wrapped by the ADD_64() macro. */
- /* */
- FT_EXPORT( void )
- FT_Add64( FT_Int64* x,
- FT_Int64* y,
- FT_Int64 *z );
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* FT_MulTo64 */
- /* */
- /* <Description> */
- /* Multiplies two Int32 integers. Returns an Int64 integer. */
- /* */
- /* <Input> */
- /* x :: The first multiplier. */
- /* y :: The second multiplier. */
- /* */
- /* <Output> */
- /* z :: A pointer to the result of `x * y'. */
- /* */
- /* <Note> */
- /* Will be wrapped by the MUL_64() macro. */
- /* */
- FT_EXPORT( void )
- FT_MulTo64( FT_Int32 x,
- FT_Int32 y,
- FT_Int64 *z );
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* FT_Div64by32 */
- /* */
- /* <Description> */
- /* Divides an Int64 value by an Int32 value. Returns an Int32 */
- /* integer. */
- /* */
- /* <Input> */
- /* x :: A pointer to the dividend. */
- /* y :: The divisor. */
- /* */
- /* <Return> */
- /* The result of `x / y'. */
- /* */
- /* <Note> */
- /* Will be wrapped by the DIV_64() macro. */
- /* */
- FT_EXPORT( FT_Int32 )
- FT_Div64by32( FT_Int64* x,
- FT_Int32 y );
-
-
-#define SQRT_64( z ) FT_Sqrt64( &z )
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* FT_Sqrt64 */
- /* */
- /* <Description> */
- /* Computes the square root of a 64-bits value. That sounds stupid, */
- /* but it is needed to obtain maximal accuracy in the TrueType */
- /* bytecode interpreter. */
- /* */
- /* <Input> */
- /* z :: A pointer to a 64-bit integer. */
- /* */
- /* <Return> */
- /* The 32-bit square-root. */
- /* */
- FT_EXPORT( FT_Int32 )
- FT_Sqrt64( FT_Int64* x );
-
-
-#endif /* !FT_LONG64 */
-
-#endif /* FT_CONFIG_OPTION_OLD_CALCS */
-
-
FT_EXPORT( FT_Int32 ) FT_SqrtFixed( FT_Int32 x );
-#ifndef FT_CONFIG_OPTION_OLD_CALCS
-
#define SQRT_32( x ) FT_Sqrt32( x )
@@ -206,8 +55,6 @@ FT_BEGIN_HEADER
FT_Sqrt32( FT_Int32 x );
-#endif /* !FT_CONFIG_OPTION_OLD_CALCS */
-
/*************************************************************************/
/* */
diff --git a/src/base/ftcalc.c b/src/base/ftcalc.c
index 8f024673b..f4e349df1 100644
--- a/src/base/ftcalc.c
+++ b/src/base/ftcalc.c
@@ -39,13 +39,12 @@
/* we need to define a 64-bits data type here */
-#ifndef FT_CONFIG_OPTION_OLD_CALCS
#ifdef FT_LONG64
typedef FT_INT64 FT_Int64;
-#else
+#else /* !FT_LONG64 */
typedef struct FT_Int64_
{
@@ -54,9 +53,8 @@
} FT_Int64;
-#endif /* FT_LONG64 */
+#endif /* !FT_LONG64 */
-#endif /* !FT_CONFIG_OPTION_OLD_CALCS */
/*************************************************************************/
@@ -102,27 +100,6 @@
}
-#ifdef FT_CONFIG_OPTION_OLD_CALCS
-
- static const FT_Long ft_square_roots[63] =
- {
- 1L, 1L, 2L, 3L, 4L, 5L, 8L, 11L,
- 16L, 22L, 32L, 45L, 64L, 90L, 128L, 181L,
- 256L, 362L, 512L, 724L, 1024L, 1448L, 2048L, 2896L,
- 4096L, 5892L, 8192L, 11585L, 16384L, 23170L, 32768L, 46340L,
-
- 65536L, 92681L, 131072L, 185363L, 262144L, 370727L,
- 524288L, 741455L, 1048576L, 1482910L, 2097152L, 2965820L,
- 4194304L, 5931641L, 8388608L, 11863283L, 16777216L, 23726566L,
-
- 33554432L, 47453132L, 67108864L, 94906265L,
- 134217728L, 189812531L, 268435456L, 379625062L,
- 536870912L, 759250125L, 1073741824L, 1518500250L,
- 2147483647L
- };
-
-#else
-
/* documentation is in ftcalc.h */
FT_EXPORT_DEF( FT_Int32 )
@@ -152,7 +129,6 @@
return root;
}
-#endif /* FT_CONFIG_OPTION_OLD_CALCS */
#ifdef FT_LONG64
@@ -222,52 +198,7 @@
}
-#ifdef FT_CONFIG_OPTION_OLD_CALCS
-
- /* a helper function for FT_Sqrt64() */
-
- static int
- ft_order64( FT_Int64 z )
- {
- int j = 0;
-
-
- while ( z )
- {
- z = (unsigned FT_INT64)z >> 1;
- j++;
- }
- return j - 1;
- }
-
-
- /* documentation is in ftcalc.h */
-
- FT_EXPORT_DEF( FT_Int32 )
- FT_Sqrt64( FT_Int64 l )
- {
- FT_Int64 r, s;
-
-
- if ( l <= 0 ) return 0;
- if ( l == 1 ) return 1;
-
- r = ft_square_roots[ft_order64( l )];
-
- do
- {
- s = r;
- r = ( r + l / r ) >> 1;
-
- } while ( r > s || r * r > l );
-
- return (FT_Int32)r;
- }
-
-#endif /* FT_CONFIG_OPTION_OLD_CALCS */
-
-
-#else /* FT_LONG64 */
+#else /* !FT_LONG64 */
static void
@@ -550,7 +481,7 @@
return ( s < 0 ? -(FT_Int32)q : (FT_Int32)q );
}
-#else
+#else /* 0 */
FT_EXPORT_DEF( FT_Int32 )
FT_Div64by32( FT_Int64* x,
FT_Int32 y )
@@ -582,89 +513,10 @@
return ( s < 0 ? -(FT_Int32)q : (FT_Int32)q );
}
-#endif
-
-
-#ifdef FT_CONFIG_OPTION_OLD_CALCS
-
-
- /* two helper functions for FT_Sqrt64() */
-
- static void
- FT_Sub64( FT_Int64* x,
- FT_Int64* y,
- FT_Int64* z )
- {
- register FT_UInt32 lo, hi;
-
-
- lo = x->lo - y->lo;
- hi = x->hi - y->hi - ( (FT_Int32)lo < 0 );
-
- z->lo = lo;
- z->hi = hi;
- }
-
-
- static int
- ft_order64( FT_Int64* z )
- {
- FT_UInt32 i;
- int j;
-
-
- i = z->lo;
- j = 0;
- if ( z->hi )
- {
- i = z->hi;
- j = 32;
- }
-
- while ( i > 0 )
- {
- i >>= 1;
- j++;
- }
- return j - 1;
- }
-
-
- /* documentation is in ftcalc.h */
-
- FT_EXPORT_DEF( FT_Int32 )
- FT_Sqrt64( FT_Int64* l )
- {
- FT_Int64 l2;
- FT_Int32 r, s;
-
-
- if ( (FT_Int32)l->hi < 0 ||
- ( l->hi == 0 && l->lo == 0 ) )
- return 0;
-
- s = ft_order64( l );
- if ( s == 0 )
- return 1;
-
- r = ft_square_roots[s];
- do
- {
- s = r;
- r = ( r + FT_Div64by32( l, r ) ) >> 1;
- FT_MulTo64( r, r, &l2 );
- FT_Sub64 ( l, &l2, &l2 );
-
- } while ( r > s || (FT_Int32)l2.hi < 0 );
-
- return r;
- }
-
-
-#endif /* FT_CONFIG_OPTION_OLD_CALCS */
+#endif /* 0 */
-#endif /* FT_LONG64 */
+#endif /* !FT_LONG64 */
/* a not-so-fast but working 16.16 fixed point square root function */
diff --git a/src/base/fttrigon.c b/src/base/fttrigon.c
index 8a2778b69..e647b0d06 100644
--- a/src/base/fttrigon.c
+++ b/src/base/fttrigon.c
@@ -417,7 +417,11 @@
ft_trig_pseudo_polarize( &v );
v.x = ft_trig_downscale( v.x );
- return ( shift >= 0 ) ? ( v.x >> shift ) : ( v.x << -shift );
+
+ if ( shift > 0 )
+ return ( v.x + (1 << (shift-1)) ) >> shift;
+
+ return v.x << -shift;
}
diff --git a/src/truetype/ttinterp.c b/src/truetype/ttinterp.c
index 9748e9a4e..e3223b5fd 100644
--- a/src/truetype/ttinterp.c
+++ b/src/truetype/ttinterp.c
@@ -27,6 +27,8 @@
#include "tterrors.h"
+
+
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
@@ -825,38 +827,6 @@
}
- /* return length of given vector */
-#ifdef FT_CONFIG_OPTION_OLD_CALCS
-
- static FT_F26Dot6
- Norm( FT_F26Dot6 X,
- FT_F26Dot6 Y )
- {
- TT_INT64 T1, T2;
-
-
- MUL_64( X, X, T1 );
- MUL_64( Y, Y, T2 );
-
- ADD_64( T1, T2, T1 );
-
- return (FT_F26Dot6)SQRT_64( T1 );
- }
-
-#else /* !FT_CONFIG_OPTION_OLD_CALCS */
-
- static FT_F26Dot6
- Norm( FT_F26Dot6 X,
- FT_F26Dot6 Y )
- {
- FT_Vector v;
-
- v.x = X;
- v.y = Y;
- return FT_Vector_Length( &v );
- }
-
-#endif /* FT_CONFIG_OPTION_OLD_CALCS */
/*************************************************************************/
@@ -1200,6 +1170,153 @@
#undef NULL_Vector
#define NULL_Vector (FT_Vector*)&Null_Vector
+
+ /* compute (a*b)/2^14 with maximal accuracy and rounding */
+ static FT_Int32
+ TT_MulFix14( FT_Int32 a, FT_Int b )
+ {
+ FT_Int32 m, s, hi;
+ FT_UInt32 l, lo;
+
+ /* compute ax*bx as 64-bit value */
+ l = (FT_UInt32)( (a & 0xFFFF)*b );
+ m = (a >> 16)*b;
+
+ lo = l + (FT_UInt32)(m << 16);
+ hi = (m >> 16) + ((FT_Int32)l >> 31) + (lo < l);
+
+ /* divide the result by 2^14 with rounding */
+ s = (hi >> 31);
+ l = lo + (FT_UInt32)s;
+ hi += s + (l < lo);
+ lo = l;
+
+ l = lo + 0x2000U;
+ hi += (l < lo);
+
+ return ( (hi << 18) | (l >> 14) );
+ }
+
+
+ /* compute (ax*bx+ay*by)/2^14 with maximal accuracy and rounding */
+ static FT_Int32
+ TT_DotFix14( FT_Int32 ax, FT_Int32 ay, FT_Int bx, FT_Int by )
+ {
+ FT_Int32 m, s, hi1, hi2, hi;
+ FT_UInt32 l, lo1, lo2, lo;
+
+ /* compute ax*bx as 64-bit value */
+ l = (FT_UInt32)( (ax & 0xFFFF)*bx );
+ m = (ax >> 16)*bx;
+
+ lo1 = l + (FT_UInt32)(m << 16);
+ hi1 = (m >> 16) + ((FT_Int32)l >> 31) + (lo1 < l);
+
+ /* compute ay*by as 64-bit value */
+ l = (FT_UInt32)( (ay & 0xFFFF)*by );
+ m = (ay >> 16)*by;
+
+ lo2 = l + (FT_UInt32)(m << 16);
+ hi2 = (m >> 16) + ((FT_Int32)l >> 31) + (lo2 < l);
+
+ /* add them */
+ lo = lo1 + lo2;
+ hi = hi1 + hi2 + (lo < lo1);
+
+ /* divide the result by 2^14 with rounding */
+ s = (hi >> 31);
+ l = lo + (FT_UInt32)s;
+ hi += s + (l < lo);
+ lo = l;
+
+ l = lo + 0x2000U;
+ hi += (l < lo);
+
+ return ( (hi << 18) | (l >> 14) );
+ }
+
+ /* return length of given vector */
+#if 0
+
+ static FT_Int32
+ TT_VecLen( FT_Int32 x, FT_Int32 y )
+ {
+ FT_Int32 m, hi1, hi2, hi;
+ FT_UInt32 l, lo1, lo2, lo;
+
+ /* compute x*x as 64-bit value */
+ lo = (FT_UInt32)(x & 0xFFFF);
+ hi = (x >> 16);
+
+ l = lo*lo;
+ m = hi*lo;
+ hi = hi*hi;
+
+ lo1 = l + (FT_UInt32)(m << 17);
+ hi1 = hi + (m >> 15) + (lo1 < l);
+
+ /* compute y*y as 64-bit value */
+ lo = (FT_UInt32)( y & 0xFFFF );
+ hi = (y >> 16);
+
+ l = lo*lo;
+ m = hi*lo;
+ hi = hi*hi;
+
+ lo2 = l + (FT_UInt32)(m << 17);
+ hi2 = hi + (m >> 15) + (lo2 < l);
+
+ /* add them to get 'x*x+y*y' as 64-bit value */
+ lo = lo1 + lo2;
+ hi = hi1 + hi2 + (lo < lo1);
+
+ /* compute the square root of this value */
+ {
+ FT_UInt32 root, rem, test_div;
+ FT_Int count;
+
+
+ root = 0;
+
+ {
+ rem = 0;
+ count = 32;
+ do
+ {
+ rem = ( rem << 2 ) | ( (FT_UInt32)hi >> 30 );
+ hi = ( hi << 2 ) | ( lo >> 30 );
+ lo <<= 2;
+ root <<= 1;
+ test_div = ( root << 1 ) + 1;
+
+ if ( rem >= test_div )
+ {
+ rem -= test_div;
+ root += 1;
+ }
+ } while ( --count );
+ }
+
+ return (FT_Int32)root;
+ }
+ }
+#else
+
+ /* this version uses FT_Vector_Length which computes the same value */
+ /* much, much faster.. */
+ /* */
+ static FT_F26Dot6
+ TT_VecLen( FT_F26Dot6 X,
+ FT_F26Dot6 Y )
+ {
+ FT_Vector v;
+
+ v.x = X;
+ v.y = Y;
+ return FT_Vector_Length( &v );
+ }
+
+#endif
/*************************************************************************/
/* */
@@ -1229,9 +1346,10 @@
{
FT_Long x, y;
- x = TT_MULDIV( CUR.GS.projVector.x, CUR.tt_metrics.x_ratio, 0x4000 );
- y = TT_MULDIV( CUR.GS.projVector.y, CUR.tt_metrics.y_ratio, 0x4000 );
- CUR.tt_metrics.ratio = Norm( x, y );
+ x = TT_MulFix14( CUR.tt_metrics.x_ratio, CUR.GS.projVector.x );
+ y = TT_MulFix14( CUR.tt_metrics.y_ratio, CUR.GS.projVector.y );
+
+ CUR.tt_metrics.ratio = TT_VecLen( x, y );
}
return CUR.tt_metrics.ratio;
@@ -1982,8 +2100,10 @@
Project( EXEC_OP_ FT_Vector* v1,
FT_Vector* v2 )
{
- return TT_MULDIV( v1->x - v2->x, CUR.GS.projVector.x, 0x4000 ) +
- TT_MULDIV( v1->y - v2->y, CUR.GS.projVector.y, 0x4000 );
+ return TT_DotFix14( v1->x - v2->x,
+ v1->y - v2->y,
+ CUR.GS.projVector.x,
+ CUR.GS.projVector.y );
}
@@ -2007,8 +2127,10 @@
Dual_Project( EXEC_OP_ FT_Vector* v1,
FT_Vector* v2 )
{
- return TT_MULDIV( v1->x - v2->x, CUR.GS.dualVector.x, 0x4000 ) +
- TT_MULDIV( v1->y - v2->y, CUR.GS.dualVector.y, 0x4000 );
+ return TT_DotFix14( v1->x - v2->x,
+ v1->y - v2->y,
+ CUR.GS.dualVector.x,
+ CUR.GS.dualVector.y );
}
@@ -2032,8 +2154,10 @@
Free_Project( EXEC_OP_ FT_Vector* v1,
FT_Vector* v2 )
{
- return TT_MULDIV( v1->x - v2->x, CUR.GS.freeVector.x, 0x4000 ) +
- TT_MULDIV( v1->y - v2->y, CUR.GS.freeVector.y, 0x4000 );
+ return TT_DotFix14( v1->x - v2->x,
+ v1->y - v2->y,
+ CUR.GS.freeVector.x,
+ CUR.GS.freeVector.y );
}
@@ -2188,8 +2312,6 @@
/* R is undefined. */
/* */
-#ifdef FT_CONFIG_OPTION_OLD_CALCS
-
static FT_Bool
Normalize( EXEC_OP_ FT_F26Dot6 Vx,
FT_F26Dot6 Vy,
@@ -2206,7 +2328,7 @@
Vx *= 0x100;
Vy *= 0x100;
- W = Norm( Vx, Vy );
+ W = TT_VecLen( Vx, Vy );
if ( W == 0 )
{
@@ -2221,7 +2343,7 @@
return SUCCESS;
}
- W = Norm( Vx, Vy );
+ W = TT_VecLen( Vx, Vy );
Vx = FT_MulDiv( Vx, 0x4000L, W );
Vy = FT_MulDiv( Vy, 0x4000L, W );
@@ -2284,29 +2406,6 @@
return SUCCESS;
}
-#else
-
- static FT_Bool
- Normalize( EXEC_OP_ FT_F26Dot6 Vx,
- FT_F26Dot6 Vy,
- FT_UnitVector* R )
- {
- FT_Vector v;
- FT_Angle angle;
-
- FT_UNUSED_EXEC;
-
- angle = FT_Atan2( Vx, Vy );
-
- FT_Vector_Unit( &v, angle );
-
- R->x = (short)(v.x >> 2);
- R->y = (short)(v.y >> 2);
-
- return SUCCESS;
- }
-
-#endif /* FT_CONFIG_OPTION_OLD_CALCS */
/*************************************************************************/
@@ -5225,12 +5324,8 @@
return;
}
- dx = TT_MULDIV( args[0],
- (FT_Long)CUR.GS.freeVector.x,
- 0x4000 );
- dy = TT_MULDIV( args[0],
- (FT_Long)CUR.GS.freeVector.y,
- 0x4000 );
+ dx = TT_MulFix14( args[0], CUR.GS.freeVector.x );
+ dy = TT_MulFix14( args[0], CUR.GS.freeVector.y );
while ( CUR.GS.loop > 0 )
{
@@ -5393,11 +5488,9 @@
if ( CUR.GS.gep0 == 0 ) /* If in twilight zone */
{
- CUR.zp0.org[point].x = TT_MULDIV( CUR.GS.freeVector.x,
- distance, 0x4000 );
- CUR.zp0.org[point].y = TT_MULDIV( CUR.GS.freeVector.y,
- distance, 0x4000 );
- CUR.zp0.cur[point] = CUR.zp0.org[point];
+ CUR.zp0.org[point].x = TT_MulFix14( distance, CUR.GS.freeVector.x );
+ CUR.zp0.org[point].y = TT_MulFix14( distance, CUR.GS.freeVector.y );
+ CUR.zp0.cur[point] = CUR.zp0.org[point];
}
org_dist = CUR_Func_project( CUR.zp0.cur + point, NULL_Vector );
@@ -5550,14 +5643,10 @@
if ( CUR.GS.gep1 == 0 )
{
CUR.zp1.org[point].x = CUR.zp0.org[CUR.GS.rp0].x +
- TT_MULDIV( cvt_dist,
- CUR.GS.freeVector.x,
- 0x4000 );
+ TT_MulFix14( cvt_dist, CUR.GS.freeVector.x );
CUR.zp1.org[point].y = CUR.zp0.org[CUR.GS.rp0].y +
- TT_MULDIV( cvt_dist,
- CUR.GS.freeVector.y,
- 0x4000 );
+ TT_MulFix14( cvt_dist, CUR.GS.freeVector.y );
CUR.zp1.cur[point] = CUR.zp1.org[point];
}
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