//---------------------------------------------------------------------
public LineInterpolatorAA0(OutlineRenderer ren, LineParameters lp)
{
this._ren = ren;
_aa_data = new LineInterpolatorAAData(ren, lp);
_m_di = new DistanceInterpolator1(lp.x1, lp.y1, lp.x2, lp.y2,
lp.x1 & ~LineAA.SUBPIXEL_MARK, lp.y1 & ~LineAA.SUBPIXEL_MARK);
_aa_data.m_li.adjust_forward();
}
public LineInterpolatorAAData(OutlineRenderer ren, LineParameters lp)
{
_ren = ren;
//TODO: consider resuable array
_dist = ren.GetFreeDistArray(); // new int[MAX_HALF_WIDTH + 1];
_covers = ren.GetFreeConvArray(); // new byte[MAX_HALF_WIDTH * 2 + 4];
_li = new LineInterpolatorDDA2(
lp.vertical ? LineAA.DblHr(lp.x2 - lp.x1) :
LineAA.DblHr(lp.y2 - lp.y1),
lp.vertical ? Math.Abs(lp.y2 - lp.y1) :
Math.Abs(lp.x2 - lp.x1) + 1);
//---------------------------------------------------------
_lp = lp;
_len = ((lp.vertical == (lp.inc > 0)) ? -lp.len : lp.len);
m_x = (lp.x1 >> LineAA.SUBPIXEL_SHIFT);
m_y = (lp.y1 >> LineAA.SUBPIXEL_SHIFT);
m_old_x = (m_x);
m_old_y = (m_y);
_count = ((lp.vertical ? Math.Abs((lp.y2 >> LineAA.SUBPIXEL_SHIFT) - m_y) :
Math.Abs((lp.x2 >> LineAA.SUBPIXEL_SHIFT) - m_x)));
_width = (ren.SubPixelWidth);
//m_max_extent(m_width >> (line_subpixel_shift - 2));
_max_extent = ((_width + LineAA.SUBPIXEL_MARK) >> LineAA.SUBPIXEL_SHIFT);
m_step = 0;
//-------------------
var li = new LineInterpolatorDDA2S(0, lp.vertical ?
(lp.dy << LineAA.SUBPIXEL_SHIFT) :
(lp.dx << LineAA.SUBPIXEL_SHIFT),
lp.len);
int i;
int stop = _width + LineAA.SUBPIXEL_SCALE * 2;
for (i = 0; i < MAX_HALF_WIDTH; ++i)
{
//assign and eval
//#if DEBUG
// if (li.Y == 194)
// {
// }
//#endif
if ((_dist[i] = li.Y) >= stop)
{
break;
}
li.Next();
}
_dist[i++] = 0x7FFF0000;
}
public LineInterpolatorAA2(
OutlineRenderer ren, LineParameters lp,
int ex, int ey)
{
this._ren = ren;
_aa_data = new Lines.LineInterpolatorAAData(ren, lp);
_m_di = new DistanceInterpolator2(lp.x1, lp.y1, lp.x2, lp.y2, ex, ey,
lp.x1 & ~LineAA.SUBPIXEL_MARK, lp.y1 & ~LineAA.SUBPIXEL_MARK,
0);
_aa_data.m_li.adjust_forward();
_aa_data.m_step -= _aa_data.m_max_extent;
}
public LineInterpolatorAAData(OutlineRenderer ren, LineParameters lp)
{
m_dist = new int[MAX_HALF_WIDTH + 1];
m_covers = new byte[MAX_HALF_WIDTH * 2 + 4];
m_lp = lp;
m_li = new LineInterpolatorDDA2(lp.vertical ? LineAA.DblHr(lp.x2 - lp.x1) : LineAA.DblHr(lp.y2 - lp.y1),
lp.vertical ? Math.Abs(lp.y2 - lp.y1) : Math.Abs(lp.x2 - lp.x1) + 1);
m_len = ((lp.vertical == (lp.inc > 0)) ? -lp.len : lp.len);
m_x = (lp.x1 >> LineAA.SUBPIXEL_SHIFT);
m_y = (lp.y1 >> LineAA.SUBPIXEL_SHIFT);
m_old_x = (m_x);
m_old_y = (m_y);
m_count = ((lp.vertical ? Math.Abs((lp.y2 >> LineAA.SUBPIXEL_SHIFT) - m_y) :
Math.Abs((lp.x2 >> LineAA.SUBPIXEL_SHIFT) - m_x)));
m_width = (ren.SubPixelWidth);
//m_max_extent(m_width >> (line_subpixel_shift - 2));
m_max_extent = ((m_width + LineAA.SUBPIXEL_MARK) >> LineAA.SUBPIXEL_SHIFT);
m_step = 0;
LineInterpolatorDDA2 li = new LineInterpolatorDDA2(0,
lp.vertical ? (lp.dy << LineAA.SUBPIXEL_SHIFT) : (lp.dx << LineAA.SUBPIXEL_SHIFT),
lp.len);
int i;
int stop = m_width + LineAA.SUBPIXEL_SCALE * 2;
for (i = 0; i < MAX_HALF_WIDTH; ++i)
{
m_dist[i] = li.Y;
if (m_dist[i] >= stop)
{
break;
}
li.Next();
}
m_dist[i++] = 0x7FFF0000;
}
public LineInterpolatorAA3(OutlineRenderer ren, LineParameters lp,
int sx, int sy, int ex, int ey)
{
this._ren = ren;
_aa_data = new Lines.LineInterpolatorAAData(ren, lp);
_m_di = new DistanceInterpolator3(lp.x1, lp.y1, lp.x2, lp.y2, sx, sy, ex, ey,
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.dist_start;
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);
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.dist_start;
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);
if (npix == 0)
{
break;
}
npix = 0;
}while (--_aa_data.m_step >= -_aa_data.m_max_extent);
}
_aa_data.m_li.adjust_forward();
_aa_data.m_step -= _aa_data.m_max_extent;
}
public LineInterpolatorAAData(OutlineRenderer ren, in LineParameters lp)