public float[] GetBlendData()
{
var maxBlend = (float)MaxBlend;
var blend3 = new float[_resolution.Width * _resolution.Height * 3];
Helpers.ArrayFill(blend3, maxBlend);
var blendXList = new List <int>();
var blendYList = new List <int>();
foreach (var i in BlendRegionIndexes)
{
blendXList.Add(BlendRegionControlPoints[i].X);
blendYList.Add(BlendRegionControlPoints[i].Y);
}
var blendx = blendXList.ToArray();
var blendy = blendYList.ToArray();
var bmp = new Bitmap(_resolution.Width, _resolution.Height);
var g = Graphics.FromImage(bmp);
var points = new System.Drawing.Point[blendx.Length];
for (var i = 0; i < blendx.Length; i++)
{
points[i] = new System.Drawing.Point(blendx[i], blendy[i]);
}
g.FillPolygon(Brushes.Black, points, System.Drawing.Drawing2D.FillMode.Winding);
var bmpData = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.ReadOnly, bmp.PixelFormat);
var data = new byte[bmp.Height * bmpData.Stride];
Marshal.Copy(bmpData.Scan0, data, 0, data.Length);
bmp.UnlockBits(bmpData);
var f = bmpData.Stride / bmp.Width;
double ox = -1;
int w = -1;
for (int y = 0; y < _resolution.Height; y++)
{
var yf = y * _resolution.Width * f;
for (int x = 0; x < _resolution.Width; x++)
{
if (data[x * f + yf + 3] > 0)
{
if (w == -1)
{
w = CalcWidth(data, f, _resolution.Width, x, y);
ox = x;
}
var value = maxBlend;
if (w > 0)
{
var x2 = 1d / w * (x - ox);
if (Index == 1)
{
x2 = 1d - x2;
}
value = (float)(BlendCurve.GetY(x2) * maxBlend);
}
blend3[(x + y * _resolution.Width) * 3 + 0] = value;
blend3[(x + y * _resolution.Width) * 3 + 1] = value;
blend3[(x + y * _resolution.Width) * 3 + 2] = value;
}
else
{
w = -1;
}
}
}
return(blend3.ToArray());
}
