System.Windows.Forms.XplatUIX11.FillReversibleRectangle C# (CSharp) Method

		internal override void FillReversibleRectangle (Rectangle rectangle, Color backColor) 
		{
			if (backColor.GetBrightness() < 0.5)
				backColor = Color.FromArgb(255 - backColor.R, 255 - backColor.G, 255 - backColor.B);

			IntPtr gc = GetReversibleScreenGC (backColor);

			if (rectangle.Width < 0) {
				rectangle.X += rectangle.Width;
				rectangle.Width = -rectangle.Width;
			}
			if (rectangle.Height < 0) {
				rectangle.Y += rectangle.Height;
				rectangle.Height = -rectangle.Height;
			}
			XFillRectangle(DisplayHandle, RootWindow, gc, rectangle.Left, rectangle.Top, rectangle.Width, rectangle.Height);

			XFreeGC(DisplayHandle, gc);
		}