public static Size Resize(this Size actualSize, Size newSize, ResizeMode resizeMode, OrientationMode orientationMode)
{
if (orientationMode == OrientationMode.RotateForBestFit)
{
if ((actualSize.Width > actualSize.Height) && !(newSize.Width > newSize.Height))
newSize = newSize.SwapWidthHeight();
else if ((actualSize.Width < actualSize.Height) && !(newSize.Width < newSize.Height))
newSize = newSize.SwapWidthHeight();
}
var heightResizeFactor = newSize.Height / (double)actualSize.Height;
var widthResizeFactor = newSize.Width / (double)actualSize.Width;
if (resizeMode == ResizeMode.FitsInBox)
{
if (heightResizeFactor > widthResizeFactor)
{
newSize = new Size(newSize.Width, (int)((double)actualSize.Height * widthResizeFactor));
}
else
{
newSize = new Size((int)((double)actualSize.Width * heightResizeFactor), newSize.Height);
}
}
else if (resizeMode == ResizeMode.BoxFitsIn || resizeMode == ResizeMode.BoxFitsInCropped)
{
if (heightResizeFactor < widthResizeFactor)
{
newSize = new Size(newSize.Width, (int)((double)actualSize.Height * widthResizeFactor));
}
else
{
newSize = new Size((int)((double)actualSize.Width * heightResizeFactor), newSize.Height);
}
}
else if (resizeMode == ResizeMode.Stretch)
{
// Do nothing
}
else
{
throw new ArgumentException("Unsupported ResizeMode value.");
}
return newSize;
}
