public int BaseStepH(ref DistanceInterpolator2 di)
{
m_li.Next();
m_x += m_lp.inc;
m_y = (m_lp.y1 + m_li.Y) >> LineAA.SUBPIXEL_SHIFT;
if (m_lp.inc > 0)
{
di.IncX(m_y - m_old_y);
}
else
{
di.DecX(m_y - m_old_y);
}
m_old_y = m_y;
return(di.Distance / m_len);
}
public LineInterpolatorAA1(OutlineRenderer ren, LineParameters lp, int sx, int sy)
{
this._ren = ren;
_aa_data = new Lines.LineInterpolatorAAData(ren, lp);
_m_di = new DistanceInterpolator2(lp.x1, lp.y1, lp.x2, lp.y2, sx, sy,
lp.x1 & ~LineAA.SUBPIXEL_MARK, lp.y1 & ~LineAA.SUBPIXEL_MARK);
int dist1_start;
int dist2_start;
int npix = 1;
if (lp.vertical)
{
do
{
_aa_data.m_li.Prev();
_aa_data.m_y -= lp.inc;
_aa_data.m_x = (_aa_data.m_lp.x1 + _aa_data.m_li.Y) >> LineAA.SUBPIXEL_SHIFT;
//
if (lp.inc > 0)
{
_m_di.DecY(_aa_data.m_x - _aa_data.m_old_x);
}
else
{
_m_di.IncY(_aa_data.m_x - _aa_data.m_old_x);
}
//
_aa_data.m_old_x = _aa_data.m_x;
dist1_start = dist2_start = _m_di.DistanceStart;
int dx = 0;
if (dist1_start < 0)
{
++npix;
}
do
{
dist1_start += _m_di.DyStart;
dist2_start -= _m_di.DyStart;
if (dist1_start < 0)
{
++npix;
}
if (dist2_start < 0)
{
++npix;
}
++dx;
}while (_aa_data.m_dist[dx] <= _aa_data.m_width);
--_aa_data.m_step;
if (npix == 0)
{
break;
}
npix = 0;
}while (_aa_data.m_step >= -_aa_data.m_max_extent);
}
else
{
do
{
_aa_data.m_li.Prev();
_aa_data.m_x -= lp.inc;
_aa_data.m_y = (_aa_data.m_lp.y1 + _aa_data.m_li.Y) >> LineAA.SUBPIXEL_SHIFT;
//
if (lp.inc > 0)
{
_m_di.DecX(_aa_data.m_y - _aa_data.m_old_y);
}
else
{
_m_di.IncX(_aa_data.m_y - _aa_data.m_old_y);
}
//
_aa_data.m_old_y = _aa_data.m_y;
dist1_start = dist2_start = _m_di.DistanceStart;
int dy = 0;
if (dist1_start < 0)
{
++npix;
}
do
{
dist1_start -= _m_di.DxStart;
dist2_start += _m_di.DxStart;
if (dist1_start < 0)
{
++npix;
}
if (dist2_start < 0)
{
++npix;
}
++dy;
}while (_aa_data.m_dist[dy] <= _aa_data.m_width);
--_aa_data.m_step;
if (npix == 0)
{
break;
}
npix = 0;
}while (_aa_data.m_step >= -_aa_data.m_max_extent);
}
_aa_data.m_li.adjust_forward();
}