public static unsafe UnmanagedImage<TPixel> ForEach(this UnmanagedImage<TPixel> src, TPixel* start, uint length, ActionOnPixel handler)
{
TPixel* end = start + src.Length;
while (start != end)
{
handler(start);
++start;
}
return src;
}
public void FloodFill(System.Drawing.Point location, TPixel anchorColor, TPixel replecedColor)
{
int width = this.Width;
int height = this.Height;
if (location.X < 0 || location.X >= width || location.Y < 0 || location.Y >= height) return;
if (anchorColor == replecedColor) return;
if (this[location.Y, location.X] != anchorColor) return;
Stack<System.Drawing.Point> points = new Stack<System.Drawing.Point>();
points.Push(location);
int ww = width - 1;
int hh = height - 1;
while (points.Count > 0)
{
System.Drawing.Point p = points.Pop();
this[p.Y, p.X] = replecedColor;
if (p.X > 0 && this[p.Y, p.X - 1] == anchorColor)
{
this[p.Y, p.X - 1] = replecedColor;
points.Push(new System.Drawing.Point(p.X - 1, p.Y));
}
if (p.X < ww && this[p.Y, p.X + 1] == anchorColor)
{
this[p.Y, p.X + 1] = replecedColor;
points.Push(new System.Drawing.Point(p.X + 1, p.Y));
}
if (p.Y > 0 && this[p.Y - 1, p.X] == anchorColor)
{
this[p.Y - 1, p.X] = replecedColor;
points.Push(new System.Drawing.Point(p.X, p.Y - 1));
}
if (p.Y < hh && this[p.Y + 1, p.X] == anchorColor)
{
this[p.Y + 1, p.X] = replecedColor;
points.Push(new System.Drawing.Point(p.X, p.Y + 1));
}
}
}
public unsafe void Replace(TPixel pixel, TPixel replaced)
{
TPixel* p = this.Start;
TPixel* end = p + this.Length;
while (p != end)
{
if (*p == pixel)
{
*p = replaced;
}
p++;
}
}
public unsafe void Fill(TPixel pixel)
{
TPixel* p = this.Start;
TPixel* end = p + this.Length;
while (p != end)
{
*p = pixel;
p++;
}
}