public void SetColourData(Color[,] colours)
{
if (colours == null)
{
throw new ArgumentNullException(nameof(colours));
}
if ((colours.GetLowerBound(0) != 0) || (colours.GetLowerBound(0) >= Width) || (colours.GetLowerBound(1) != 0) || (colours.GetLowerBound(1) >= Height))
{
throw new ArgumentOutOfRangeException(nameof(colours));
}
var imageData = _context.GetImageData(0, 0, Width, Height);
var data = imageData.Data;
for (var x = 0; x < Width; x++)
{
for (var y = 0; y < Height; y++)
{
var colour = colours[x, y];
var startIndex = (y * (Width * 4)) + (x * 4);
data[startIndex] = colour.R;
data[startIndex + 1] = colour.G;
data[startIndex + 2] = colour.B;
data[startIndex + 3] = 255; // alpha
}
}
_context.PutImageData(imageData, 0, 0);
}
private static void changeColorAt(int x, int y, Color colour)
{
if (x > imageArray.GetUpperBound(0) || x < imageArray.GetLowerBound(0) ||
y > imageArray.GetUpperBound(1) || y < imageArray.GetLowerBound(1))
{
Console.WriteLine("Exception: changeColorAt: outOfBounds: {0}, {1}", x, y);
return;
}
imageArray[x, y] = colour;
}