private SizeF TransformMeasureFromViewport(SizeF input)
{
var v2 = Options.TransformToViewport;
if (v2 == null)
{
return input;
}
var v1 = ProjectionStack.CurrentViewport;
float X, Y;
X = input.Width * ((float)v2.Value.Width / v1.Value.Width);
Y = input.Height * ((float)v2.Value.Height / v1.Value.Height);
return new SizeF(X, Y);
}