public static unsafe void FillStencilFromPoint <TBitVector2D>(IRenderer <ColorBgra> sampleSource, TBitVector2D stencilBuffer, PointInt32 startPt, byte tolerance, Func <bool> isCancellationRequestedFn, out RectInt32 bounds) where TBitVector2D : IBitVector2D
{
Validate.IsNotNull <IRenderer <ColorBgra> >(sampleSource, "sampleSource");
int width = sampleSource.Width;
int height = sampleSource.Height;
if ((width > stencilBuffer.Width) || (height > stencilBuffer.Height))
{
throw new ArgumentException();
}
if (!sampleSource.CheckPointValue <ColorBgra>(startPt))
{
bounds = RectInt32.Empty;
}
else
{
int num3 = sampleSource.Width;
int num4 = sampleSource.Height;
using (RendererRowCache <ColorBgra> cache = new RendererRowCache <ColorBgra>(sampleSource))
{
int num5 = 0x7fffffff;
int num6 = 0x7fffffff;
int num7 = -2147483648;
int num8 = -2147483648;
Queue <PointInt32> queue = new Queue <PointInt32>(0x10);
queue.Enqueue(startPt);
cache.AddRowRef(startPt.Y - 1);
cache.AddRowRef(startPt.Y);
cache.AddRowRef(startPt.Y + 1);
ColorBgra start = *((ColorBgra *)(((void *)cache.GetRow(startPt.Y)) + (startPt.X * sizeof(ColorBgra))));
while (queue.Any <PointInt32>())
{
if (isCancellationRequestedFn())
{
bounds = RectInt32.Empty;
return;
}
PointInt32 pt = queue.Dequeue();
try
{
if (sampleSource.CheckPointValue <ColorBgra>(pt))
{
ColorBgra *row = (ColorBgra *)cache.GetRow(pt.Y);
int x = pt.X - 1;
int num11 = pt.X;
while (((x >= 0) && !stencilBuffer.Get(x, pt.Y)) && CheckColor(start, row[x], tolerance))
{
stencilBuffer.Set(x, pt.Y, true);
x--;
}
while (((num11 < num3) && !stencilBuffer.Get(num11, pt.Y)) && CheckColor(start, row[num11], tolerance))
{
stencilBuffer.Set(num11, pt.Y, true);
num11++;
}
x++;
num11--;
if (pt.Y > 0)
{
cache.AddRowRef(pt.Y - 2);
cache.AddRowRef(pt.Y - 1);
cache.AddRowRef(pt.Y);
try
{
ColorBgra *bgraPtr2 = (ColorBgra *)cache.GetRow(pt.Y - 1);
int num12 = x;
int num13 = x;
for (int i = x; i <= num11; i++)
{
if (!stencilBuffer.Get(i, pt.Y - 1) && CheckColor(start, bgraPtr2[i], tolerance))
{
num13++;
}
else
{
if ((num13 - num12) > 0)
{
queue.Enqueue(new PointInt32(num12, pt.Y - 1));
cache.AddRowRef(pt.Y - 2);
cache.AddRowRef(pt.Y - 1);
cache.AddRowRef(pt.Y);
}
num13++;
num12 = num13;
}
}
if ((num13 - num12) > 0)
{
queue.Enqueue(new PointInt32(num12, pt.Y - 1));
cache.AddRowRef(pt.Y - 2);
cache.AddRowRef(pt.Y - 1);
cache.AddRowRef(pt.Y);
}
}
finally
{
cache.ReleaseRowRef(pt.Y - 2);
cache.ReleaseRowRef(pt.Y - 1);
cache.ReleaseRowRef(pt.Y);
}
}
if (pt.Y < (num4 - 1))
{
cache.AddRowRef(pt.Y);
cache.AddRowRef(pt.Y + 1);
cache.AddRowRef(pt.Y + 2);
try
{
ColorBgra *bgraPtr3 = (ColorBgra *)cache.GetRow(pt.Y + 1);
int num15 = x;
int num16 = x;
for (int j = x; j <= num11; j++)
{
if (!stencilBuffer.Get(j, pt.Y + 1) && CheckColor(start, bgraPtr3[j], tolerance))
{
num16++;
}
else
{
if ((num16 - num15) > 0)
{
queue.Enqueue(new PointInt32(num15, pt.Y + 1));
cache.AddRowRef(pt.Y);
cache.AddRowRef(pt.Y + 1);
cache.AddRowRef(pt.Y + 2);
}
num16++;
num15 = num16;
}
}
if ((num16 - num15) > 0)
{
queue.Enqueue(new PointInt32(num15, pt.Y + 1));
cache.AddRowRef(pt.Y);
cache.AddRowRef(pt.Y + 1);
cache.AddRowRef(pt.Y + 2);
}
}
finally
{
cache.ReleaseRowRef(pt.Y);
cache.ReleaseRowRef(pt.Y + 1);
cache.ReleaseRowRef(pt.Y + 2);
}
}
num5 = Math.Min(num5, x);
num6 = Math.Min(num6, pt.Y);
num7 = Math.Max(num7, num11);
num8 = Math.Max(num8, pt.Y);
}
continue;
}
finally
{
cache.ReleaseRowRef(pt.Y - 1);
cache.ReleaseRowRef(pt.Y);
cache.ReleaseRowRef(pt.Y + 1);
}
}
bounds = RectInt32.FromEdges(num5, num6, num7, num8);
}
}
}