private static bool AreDirectNeighbors(Point point1, Point point2)
{
return Math.Abs(point1.X - point2.X) <= 15 && Math.Abs(point1.Y - point2.Y) <= 15;
}
private IEnumerable<List<Point>> GetNeighboringColors(int x, int y)
{
var results = new List<List<Point>>();
var result = new List<Point>();
results.Add(result);
var currentPoint = new Point { X = x, Y = y };
this._colorsProcessed[x, y] = true;
result.Add(currentPoint);
var processQueue = new List<Point> { currentPoint };
int i = 0;
while (processQueue.Count > i)
{
Point neighbor = processQueue.ElementAt(i);
i++;
foreach (Point newNeighbor in this.GetMatchingUnprocessedDirectNeighbors(neighbor.X, neighbor.Y))
{
this._colorsProcessed[newNeighbor.X, newNeighbor.Y] = true;
if (!AreDirectNeighbors(result.Last(), newNeighbor))
{
result = new List<Point>();
results.Add(result);
}
processQueue.Insert(i, newNeighbor);
result.Add(newNeighbor);
}
}
return results;
}
public IEnumerable<MouseDragAction> GetDrawInstructions(List<ColorSpot> PaletteColorSpots, IDictionary<string, string> settings = null, IBrushChanger brushChanger = null)
{
int ignoreColorIndex =
PaletteColorSpots.IndexOf(PaletteColorSpots.FirstOrDefault(x => x.Color.Name == IgnoreColor));
if (!PaletteColorSpots.Any())
{
PaletteColorSpots = new List<ColorSpot> {new ColorSpot {Color = Color.Black, Point = Point.Empty}};
}
int bitmapHeight;
int bitmapWidth;
var output = new List<MouseDragAction>();
using (var bitmap = new Bitmap(_bitmapPath))
{
bitmapHeight = bitmap.Height;
bitmapWidth = bitmap.Width;
_colors = new int[bitmapWidth,bitmapHeight];
var rect = new Rectangle(0, 0, bitmapWidth, bitmapHeight);
BitmapData bmpData = bitmap.LockBits(rect, ImageLockMode.ReadOnly, bitmap.PixelFormat);
IntPtr ptr = bmpData.Scan0;
int bytes = bmpData.Stride*bitmapHeight;
var rgbValues = new byte[bytes];
Marshal.Copy(ptr, rgbValues, 0, bytes);
for (int x = 0; x < bitmapWidth; x++)
{
for (int y = 0; y < bitmapHeight; y++)
{
int position = (y*bmpData.Stride) + (x*3);
int blue = rgbValues[position];
int green = rgbValues[position + 1];
int red = rgbValues[position + 2];
Color currentColor = Color.FromArgb(red, green, blue);
ColorSpot matchingColor =
PaletteColorSpots.OrderBy(c => c.Color.DifferenceTo(currentColor)).First();
_colors[x, y] = PaletteColorSpots.IndexOf(matchingColor);
}
}
bitmap.UnlockBits(bmpData);
}
int colorCount = PaletteColorSpots.Count;
var strokesForEachColor = new List<MouseDragAction>[colorCount];
for (int i = 0; i < colorCount; i++)
{
ColorSpot paletteColorSpot = PaletteColorSpots[i];
strokesForEachColor[i] = new List<MouseDragAction>
{new MouseDragAction(new List<Point> {paletteColorSpot.Point}, true, paletteColorSpot.Color)};
}
for (int x = 0; x < bitmapWidth; x++)
{
for (int y = 0; y < bitmapHeight; y++)
{
int currentPixelColorIndex = _colors[x, y];
if (currentPixelColorIndex == ignoreColorIndex)
{
continue;
}
var currentPixelPoint = new Point(x, y);
List<MouseDragAction> strokesForCurrentColor = strokesForEachColor[currentPixelColorIndex];
bool found = false;
foreach (MouseDragAction stroke in strokesForCurrentColor)
{
if (stroke.DiscardOffset)
{
continue;
}
Point lastPoint = stroke.Points[stroke.Points.Count - 1];
if (PointsAreNeighbors(lastPoint.X, lastPoint.Y, x, y))
{
stroke.PushPoint(new Point(x, y));
found = true;
break;
}
Point firstPoint = stroke.Points[0];
if (PointsAreNeighbors(firstPoint.X, firstPoint.Y, x, y))
{
stroke.AddPoint(new Point(x, y));
found = true;
break;
}
}
if (found)
{
continue;
}
strokesForEachColor[currentPixelColorIndex].Add(
new MouseDragAction(new List<Point> {currentPixelPoint}));
}
}
foreach (var mouseDragActions in strokesForEachColor)
{
output.AddRange(mouseDragActions);
}
return output;
}