CCT.NUI.Visual.VideoControl.GetTargetArea C# (CSharp) Method

        private System.Drawing.Rectangle GetTargetArea()
        {
            if (this.Stretch)
            {
                return this.ClientRectangle;
            }
            else
            { 
                System.Drawing.Rectangle targetArea;
                if (this.imageSource == null)
                {
                    targetArea = new System.Drawing.Rectangle(0, 0, 640, 480);
                }
                else 
                {
                    targetArea = new System.Drawing.Rectangle(0, 0, this.imageSource.Width, this.imageSource.Height);
                }
                if (targetArea.Width > this.Width || targetArea.Height > this.Height)
                {
                    decimal ratio = Math.Min((decimal)this.Width / targetArea.Width, (decimal)this.Height / targetArea.Height);
                    targetArea = new System.Drawing.Rectangle(0, 0, (int)(ratio * targetArea.Width), (int)(ratio * targetArea.Height));
                }
                return targetArea;
            }
        }