public override void pie(int xc, int yc, int x1, int y1, int x2, int y2)
{
int r = ((subpixel_width() + LineAABasics.line_subpixel_mask) >> LineAABasics.line_subpixel_shift);
if (r < 1) r = 1;
ellipse_bresenham_interpolator ei = new ellipse_bresenham_interpolator(r, r);
int dx = 0;
int dy = -r;
int dy0 = dy;
int dx0 = dx;
int x = xc >> LineAABasics.line_subpixel_shift;
int y = yc >> LineAABasics.line_subpixel_shift;
do
{
dx += ei.dx();
dy += ei.dy();
if (dy != dy0)
{
pie_hline(xc, yc, x1, y1, x2, y2, x - dx0, y + dy0, x + dx0);
pie_hline(xc, yc, x1, y1, x2, y2, x - dx0, y - dy0, x + dx0);
}
dx0 = dx;
dy0 = dy;
ei.Next();
}
while (dy < 0);
pie_hline(xc, yc, x1, y1, x2, y2, x - dx0, y + dy0, x + dx0);
}
public override void semidot(CompareFunction cmp, int xc1, int yc1, int xc2, int yc2)
{
if (doClipping && ClipLiangBarsky.clipping_flags(xc1, yc1, clippingRectangle) != 0) return;
int r = ((subpixel_width() + LineAABasics.line_subpixel_mask) >> LineAABasics.line_subpixel_shift);
if (r < 1) r = 1;
ellipse_bresenham_interpolator ei = new ellipse_bresenham_interpolator(r, r);
int dx = 0;
int dy = -r;
int dy0 = dy;
int dx0 = dx;
int x = xc1 >> LineAABasics.line_subpixel_shift;
int y = yc1 >> LineAABasics.line_subpixel_shift;
do
{
dx += ei.dx();
dy += ei.dy();
if (dy != dy0)
{
semidot_hline(cmp, xc1, yc1, xc2, yc2, x - dx0, y + dy0, x + dx0);
semidot_hline(cmp, xc1, yc1, xc2, yc2, x - dx0, y - dy0, x + dx0);
}
dx0 = dx;
dy0 = dy;
ei.Next();
}
while (dy < 0);
semidot_hline(cmp, xc1, yc1, xc2, yc2, x - dx0, y + dy0, x + dx0);
}