private void Fill(int x, int y, FastBitmap bitmap, Func <int, int, Color> func)
{
int width = bitmap.Width;
int height = bitmap.Height;
bool[,] flags = new bool[width, height];
Color replaced = bitmap.GetPixel(x, y);
Stack <Point> points = new Stack <Point>();
points.Push(new Point(x, y));
while (points.Count > 0)
{
Point p = points.Pop();
if (flags[p.X, p.Y])
{
continue;
}
flags[p.X, p.Y] = true;
if (bitmap.GetPixel(p.X, p.Y) != replaced)
{
continue;
}
bitmap.SetPixel(p.X, p.Y, func(p.X, p.Y));
Push(points, new Point(p.X, p.Y + 1), width, height);
Push(points, new Point(p.X, p.Y - 1), width, height);
Push(points, new Point(p.X + 1, p.Y), width, height);
Push(points, new Point(p.X - 1, p.Y), width, height);
}
}
public static Point?StartOutline(int x, int y, FastBitmap bitmap)
{
for (var innerColor = bitmap.GetPixel(x, y); x != bitmap.Width; ++x)
{
if (bitmap.GetPixel(x, y) != innerColor)
{
return(new Point(x, y));
}
}
return(null);
}
public static LinkedList <Point> Outline(Point start, FastBitmap bitmap)
{
var outline = new LinkedList <Point>();
var currentPoint = outline.AddLast(start);
var color = bitmap.GetPixel(start.X, start.Y);
var direction = Direction.Down;
while (true)
{
Point?nextPoint;
(direction, nextPoint) = NextPoint(color, currentPoint.Value, bitmap, direction.Clockwise90Degree());
if (!nextPoint.HasValue)
{
throw new IncompleteOutlineException(outline);
}
if (nextPoint == start)
{
break;
}
currentPoint = outline.AddLast(nextPoint.Value);
}
return(outline);
}
private static (Direction, Point?) NextPoint(Color color, Point p, FastBitmap bitmap, Direction direction)
{
foreach (var(shift, nextPoint) in Neighbors(p, direction))
{
if (nextPoint.X < 0 || nextPoint.X >= bitmap.Width || nextPoint.Y < 0 || nextPoint.Y >= bitmap.Height)
{
continue;
}
if (bitmap.GetPixel(nextPoint.X, nextPoint.Y) == color)
{
return(shift, nextPoint);
}
}
return(direction, null);
}
public void MouseDown(int x, int y, FastBitmap bitmap)
{
if (!usePicture.Checked)
{
Fill(x, y, bitmap, (X, Y) => Color);
return;
}
if (bmp == null)
{
MessageBox.Show("Вы не выбрали картинку!", "Окошко-всплывашка", MessageBoxButtons.OK,
MessageBoxIcon.Error);
return;
}
FastBitmap fastBitmap = new FastBitmap(bmp, ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
int addX = fastBitmap.Width + bitmap.Width - x;
int addY = fastBitmap.Height + bitmap.Height - y;
Fill(x, y, bitmap, (X, Y) => fastBitmap.GetPixel((X + addX) % fastBitmap.Width,
(Y + addY) % fastBitmap.Height));
fastBitmap.Dispose();
}
public void WuLine(int x0, int y0, FastBitmap bitmap)
{
int x1 = lastPoint.Value.X;
int y1 = lastPoint.Value.Y;
bool angle = Math.Abs(y1 - y0) > Math.Abs(x1 - x0); // проверка угла наклона
if (angle)
{
Swap(ref x0, ref y0);
Swap(ref x1, ref y1);
}
if (x0 > x1) //направление по ox
{
Swap(ref x0, ref x1);
Swap(ref y0, ref y1);
}
//закрашиваем пиксель для начальной точки
double deltax = x1 - x0;
double deltay = y1 - y0;
double gradient = deltay / deltax;
double xEnd = Round(x0);
double yEnd = y0 + gradient * (xEnd - x0);
double xGap = 1 - getFracPart(x0 + 0.5);
double xPixel1 = xEnd;
double yPixel1 = (int)yEnd;
if (angle)
{
if (xPixel1 < bitmap.Width && yPixel1 < bitmap.Height - 1 &&
xPixel1 > 0 && yPixel1 > 0)
{
bitmap.SetPixel((int)yPixel1, (int)xPixel1, getColor((1 - getFracPart(yEnd)) * xGap, bitmap.GetPixel((int)yPixel1, (int)xPixel1)));
bitmap.SetPixel((int)yPixel1 + 1, (int)xPixel1, getColor(getFracPart(yEnd) * xGap, bitmap.GetPixel((int)yPixel1 + 1, (int)xPixel1)));
}
}
else
{
if (xPixel1 < bitmap.Width && yPixel1 < bitmap.Height - 1 &&
xPixel1 > 0 && yPixel1 > 0)
{
bitmap.SetPixel((int)xPixel1, (int)yPixel1, getColor((1 - getFracPart(yEnd)) * xGap, bitmap.GetPixel((int)xPixel1, (int)yPixel1)));
bitmap.SetPixel((int)xPixel1, (int)yPixel1 + 1, getColor(getFracPart(yEnd) * xGap, bitmap.GetPixel((int)xPixel1, (int)yPixel1 + 1)));
}
}
double y = yEnd + gradient;
//закрашиваем пиксель для конечной точки
xEnd = Round(x1);
yEnd = y1 + gradient * (xEnd - x1);
xGap = getFracPart(x1 + 0.5);
double xPixel2 = xEnd;
double yPixel2 = (int)yEnd;
if (angle)
{
if (yPixel2 < bitmap.Width - 1 && xPixel2 < bitmap.Height &&
xPixel2 >= 0 && yPixel2 >= 0)
{
bitmap.SetPixel((int)yPixel2, (int)xPixel2, getColor((1 - getFracPart(yEnd)) * xGap, bitmap.GetPixel((int)yPixel2, (int)xPixel2)));
bitmap.SetPixel((int)yPixel2 + 1, (int)xPixel2, getColor(getFracPart(yEnd) * xGap, bitmap.GetPixel((int)yPixel2 + 1, (int)xPixel2)));
}
}
else
{
if (xPixel2 < bitmap.Width && yPixel2 < bitmap.Height - 1 &&
xPixel2 >= 0 && yPixel2 >= 0)
{
bitmap.SetPixel((int)xPixel2, (int)yPixel2, getColor((1 - getFracPart(yEnd)) * xGap, bitmap.GetPixel((int)xPixel2, (int)yPixel2)));
bitmap.SetPixel((int)xPixel2, (int)yPixel2 + 1, getColor(getFracPart(yEnd) * xGap, bitmap.GetPixel((int)xPixel2, (int)yPixel2 + 1)));
}
}
//закрашиваем пиксели от начала до конца
if (angle)
{
for (int x = (int)(xPixel1 + 1); x <= xPixel2 - 1; x++)
{
if (y < bitmap.Width - 1 && x < bitmap.Height &&
x >= 0 && y >= 0)
{
bitmap.SetPixel((int)y, x, getColor(1 - (y - (int)y), bitmap.GetPixel((int)y, x)));
bitmap.SetPixel((int)y + 1, x, getColor(y - (int)y, bitmap.GetPixel((int)y + 1, x)));
}
y += gradient;
}
}
else
{
for (int x = (int)(xPixel1 + 1); x <= xPixel2 - 1; x++)
{
if (x < bitmap.Width && y < bitmap.Height - 1 &&
x >= 0 && y >= 0)
{
bitmap.SetPixel(x, (int)y, getColor(1 - (y - (int)y), bitmap.GetPixel(x, (int)y)));
bitmap.SetPixel(x, (int)y + 1, getColor(y - (int)y, bitmap.GetPixel((int)x, (int)y + 1)));
}
y += gradient;
}
}
}
