bool StepH()
{
int dist_start;
int dist_end;
int dist;
int dy;
int s1 = _aa_data.BaseStepH(ref _m_di);
int Offset0 = LineInterpolatorAAData.MAX_HALF_WIDTH + 2;
int Offset1 = Offset0;
dist_start = _m_di.dist_start;
dist_end = _m_di.dist_end;
int npix = 0;
_aa_data.m_covers[Offset1] = 0;
if (dist_end > 0)
{
if (dist_start <= 0)
{
_aa_data.m_covers[Offset1] = (byte)_ren.GetCover(s1);
}
++npix;
}
++Offset1;
dy = 1;
while ((dist = _aa_data.m_dist[dy] - s1) <= _aa_data.m_width)
{
dist_start -= _m_di.DxStart;
dist_end -= _m_di.DxEnd;
_aa_data.m_covers[Offset1] = 0;
if (dist_end > 0 && dist_start <= 0)
{
_aa_data.m_covers[Offset1] = (byte)_ren.GetCover(dist);
++npix;
}
++Offset1;
++dy;
}
dy = 1;
dist_start = _m_di.dist_start;
dist_end = _m_di.dist_end;
while ((dist = _aa_data.m_dist[dy] + s1) <= _aa_data.m_width)
{
dist_start += _m_di.DxStart;
dist_end += _m_di.DxEnd;
_aa_data.m_covers[--Offset0] = 0;
if (dist_end > 0 && dist_start <= 0)
{
_aa_data.m_covers[Offset0] = (byte)_ren.GetCover(dist);
++npix;
}
++dy;
}
_ren.BlendSolidVSpan(_aa_data.m_x,
_aa_data.m_y - dy + 1,
Offset1 - Offset0, _aa_data.m_covers,
Offset0);
return(npix != 0 && ++_aa_data.m_step < _aa_data.m_count);
}
bool StepH()
{
int dist;
int dy;
int s1 = _aa_data.BaseStepH(ref _m_di);
int Offset0 = LineInterpolatorAAData.MAX_HALF_WIDTH + 2;
int Offset1 = Offset0;
_aa_data.m_covers[Offset1++] = (byte)_ren.GetCover(s1);
dy = 1;
while ((dist = _aa_data.m_dist[dy] - s1) <= _aa_data.m_width)
{
_aa_data.m_covers[Offset1++] = (byte)_ren.GetCover(dist);
++dy;
}
dy = 1;
while ((dist = _aa_data.m_dist[dy] + s1) <= _aa_data.m_width)
{
_aa_data.m_covers[--Offset0] = (byte)_ren.GetCover(dist);
++dy;
}
_ren.BlendSolidVSpan(_aa_data.m_x,
_aa_data.m_y - dy + 1,
Offset1 - Offset0,
_aa_data.m_covers, Offset0);
return(++_aa_data.m_step < _aa_data.m_count);
}
//---------------------------------------------------------------------
bool StepH()
{
int dist_start;
int dist;
int dy;
int s1 = _aa_data.BaseStepH(ref _m_di);
dist_start = _m_di.DistanceStart;
int Offset0 = LineInterpolatorAAData.MAX_HALF_WIDTH + 2;
int Offset1 = Offset0;
_aa_data.m_covers[Offset1] = 0;
if (dist_start <= 0)
{
_aa_data.m_covers[Offset1] = (byte)_ren.GetCover(s1);
}
++Offset1;
dy = 1;
while ((dist = _aa_data.m_dist[dy] - s1) <= _aa_data.m_width)
{
dist_start -= _m_di.DxStart;
_aa_data.m_covers[Offset1] = 0;
if (dist_start <= 0)
{
_aa_data.m_covers[Offset1] = (byte)_ren.GetCover(dist);
}
++Offset1;
++dy;
}
dy = 1;
dist_start = _m_di.DistanceStart;
while ((dist = _aa_data.m_dist[dy] + s1) <= _aa_data.m_width)
{
dist_start += _m_di.DxStart;
_aa_data.m_covers[--Offset0] = 0;
if (dist_start <= 0)
{
_aa_data.m_covers[Offset0] = (byte)_ren.GetCover(dist);
}
++dy;
}
int len = Offset1 - Offset0;
_ren.BlendSolidVSpan(_aa_data.m_x,
_aa_data.m_y - dy + 1,
len, _aa_data.m_covers,
Offset0);
return(++_aa_data.m_step < _aa_data.m_count);
}