public override void SemiDotHLine(CompareFunction cmp,
int xc1, int yc1, int xc2, int yc2,
int x1, int y1, int x2)
{
byte[] covers = new byte[MAX_HALF_WIDTH * 2 + 4];
int offset0 = 0;
int offset1 = 0;
int x = x1 << LineAA.SUBPIXEL_SHIFT;
int y = y1 << LineAA.SUBPIXEL_SHIFT;
int w = SubPixelWidth;
DistanceInterpolator0 di = new DistanceInterpolator0(xc1, yc1, xc2, yc2, x, y);
x += LineAA.SUBPIXEL_SCALE / 2;
y += LineAA.SUBPIXEL_SCALE / 2;
int x0 = x1;
int dx = x - xc1;
int dy = y - yc1;
do
{
int d = (int)(AggMath.fast_sqrt(dx * dx + dy * dy));
covers[offset1] = 0;
if (cmp(di.Distance) && d <= w)
{
covers[offset1] = (byte)GetCover(d);
}
++offset1;
dx += LineAA.SUBPIXEL_SCALE;
di.IncX();
}while (++x1 <= x2);
destImageSurface.BlendSolidHSpan(x0, y1,
offset1 - offset0,
Color, covers,
offset0);
}
public void PineHLine(int xc, int yc, int xp1, int yp1, int xp2, int yp2,
int xh1, int yh1, int xh2)
{
if (doClipping && ClipLiangBarsky.Flags(xc, yc, clippingRectangle) != 0)
{
return;
}
byte[] covers = new byte[MAX_HALF_WIDTH * 2 + 4];
int index0 = 0;
int index1 = 0;
int x = xh1 << LineAA.SUBPIXEL_SHIFT;
int y = yh1 << LineAA.SUBPIXEL_SHIFT;
int w = SubPixelWidth;
DistanceInterpolator00 di = new DistanceInterpolator00(xc, yc, xp1, yp1, xp2, yp2, x, y);
x += LineAA.SUBPIXEL_SCALE / 2;
y += LineAA.SUBPIXEL_SCALE / 2;
int xh0 = xh1;
int dx = x - xc;
int dy = y - yc;
do
{
int d = (int)(AggMath.fast_sqrt(dx * dx + dy * dy));
covers[index1] = 0;
if (di.Distance1 <= 0 && di.Distance2 > 0 && d <= w)
{
covers[index1] = (byte)GetCover(d);
}
++index1;
dx += LineAA.SUBPIXEL_SCALE;
di.IncX();
}while (++xh1 <= xh2);
destImageSurface.BlendSolidHSpan(xh0, yh1, index1 - index0, Color, covers, index0);
}
public int Calculate(int x, int y, int d)
{
//return (int)System.Math.Sqrt((int)(System.Math.Abs(x) * System.Math.Abs(y)));
return((int)AggMath.fast_sqrt((int)(System.Math.Abs(x * y))));
}
