private void CoerceOptimalImageForSize(Size size)
{
if (_optimalImageForSize != null)
return;
var frame = Source as BitmapFrame;
var num1 = (int) size.LogicalToDeviceUnits().Width;
var num2 = -1;
if (frame != null)
{
if (frame.Decoder == null) return;
foreach (var bitmapFrame in frame.Decoder.Frames)
{
var pixelWidth = bitmapFrame.PixelWidth;
if (pixelWidth == num1)
{
_optimalImageForSize = bitmapFrame;
break;
}
if (pixelWidth > num1)
{
if (num2 >= num1 && pixelWidth >= num2) continue;
num2 = pixelWidth;
_optimalImageForSize = bitmapFrame;
}
else if (pixelWidth > num2)
{
num2 = pixelWidth;
_optimalImageForSize = bitmapFrame;
}
}
}
else
_optimalImageForSize = Source;
}
/// <summary>
/// Gets the actual size of the device.
/// </summary>
/// <param name="element">The element.</param>
/// <returns>Size.</returns>
public static Size GetDeviceActualSize(this FrameworkElement element)
{
Size size = new Size(element.ActualWidth, element.ActualHeight);
return size.LogicalToDeviceUnits();
}
