public void RemoveColumns(IList<int> columnsToRemove)
{
Color[] newData = new Color[width * height];
int destinationY = 0;
int destinationX = 0;
int newWidth = width - columnsToRemove.Count;
for (int y = 0; y < height; y++)
{
destinationX = 0;
for (int x = 0; x < width; x++)
{
if (columnsToRemove.Contains(x))
{
continue;
}
newData[destinationY * newWidth + destinationX] = mData[y * width + x];
destinationX++;
}
destinationY++;
}
width = newWidth;
mData = newData;
}