INT32 GBlend::FlattenSplit( POINT P0, POINT P1, POINT P2, POINT P3 )
{
POINT L1, L2, M, R1, R2 ;
L1.x = (P0.x + P1.x)/2;
L1.y = (P0.y + P1.y)/2;
L2.x = (P0.x + 2*P1.x + P2.x)/4;
L2.y = (P0.y + 2*P1.y + P2.y)/4;
M.x = (P0.x + 3*P1.x + 3*P2.x + P3.x)/8;
M.y = (P0.y + 3*P1.y + 3*P2.y + P3.y)/8;
R1.x = (P1.x + 2*P2.x + P3.x)/4;
R1.y = (P1.y + 2*P2.y + P3.y)/4;
R2.x = (P2.x + P3.x)/2;
R2.y = (P2.y + P3.y)/2;
return BezierLength(P0, L1, L2, M) + BezierLength(M, R1, R2, P3) ;
}
// --------------------------------------------------
int
DrawShape::BezierPoints(BPoint *curve, int n) {
float len = BezierLength(curve, n);
if (len <= kMinBezierPoints) return kMinBezierPoints;
if (len > kMaxBezierPoints) return kMaxBezierPoints;
return (int)len;
}
BOOL GBlend::CalcPathLengths(
PPOINT Points,
PBYTE Types,
UINT32 Length,
PUINT32 Buffer,
UINT32 BufferLength,
PUINT32 &BufferEnd
)
{
UINT32 TotalLength = 0 ;
BufferEnd = Buffer ;
UINT32 i = 1 ;
while ( i<Length )
{
if ( IsLine(Types[i]) )
{
*BufferEnd = length( Points[i-1],Points[i] ) ;
i++ ;
}
else /* Curve */
{
*BufferEnd = BezierLength( Points[i-1],Points[i],Points[i+1],Points[i+2] ) ;
i+=3 ;
}
TotalLength += *BufferEnd++ ;
}
PUINT32 P = Buffer ;
UINT32 Total = 0 ;
while ( P<BufferEnd )
{
*P = ScaledDiv( *P, TotalLength ) ;
Total += *P++ ;
}
if ( Total != 0x10000000 )
{
while ( *(--P)+0x10000000 <= Total )
{ }
*P -= Total-0x10000000 ;
}
return TRUE ;
}