/// <summary>
/// Determines if a bank slot is occupied by an empty placeholder
/// </summary>
/// <param name="screen">image of the entire game screen</param>
/// <returns></returns>
public bool SlotIsEmpty(int x, int y, Color[,] screen)
{
Rectangle counterOffset = new Rectangle(-16, -17, 8, 11);
Point slotLocation = ItemSlotLocation(x, y).Value;
int left = slotLocation.X + counterOffset.X;
int right = slotLocation.X + counterOffset.X + counterOffset.Width;
int top = slotLocation.Y + counterOffset.Y;
int bottom = slotLocation.Y + counterOffset.Y + counterOffset.Height;
if (screen == null)
{
screen = ScreenScraper.GetRGB(ScreenScraper.CaptureWindow());
}
screen = ImageProcessing.ScreenPiece(screen, left, right, top, bottom);
double slotCounterMatch = ImageProcessing.FractionalMatch(screen, RGBHSBRangeFactory.BankSlotPlaceholderZero());
return(slotCounterMatch > 0.1);
}