public ConverterPdfRect(PdfMeasurement left, PdfMeasurement right, PdfMeasurement bottom, PdfMeasurement top)
{
if (left.AsPoints() >= right.AsPoints())
{
throw new ArgumentOutOfRangeException(nameof(left), left, "left >= right");
}
if (bottom.AsPoints() >= top.AsPoints())
{
throw new ArgumentOutOfRangeException(nameof(bottom), bottom, "bottom >= top (PDF 'bottom' is zero)");
}
this.Left = left;
this.Right = right;
this.Bottom = bottom;
this.Top = top;
}
/// <summary>
/// Creates a PDF destination rectangle from the given DXF rectangle and keeps the aspect ratio.
/// Optionally, a <paramref name="margin"/> can be defined.
/// </summary>
/// <param name="srcRect">The DXF source rectangle.</param>
/// <param name="maxWidth">The maximum width of the PDF output including <paramref name="margin"/>.</param>
/// <param name="maxHeight">The maximum height of the PDF output including <paramref name="margin"/>.</param>
/// <param name="margin">[optional] The margin.</param>
/// <returns>The PDF destination rectangle.</returns>
public static ConverterPdfRect KeepAspectRatio(ConverterDxfRect srcRect, PdfMeasurement maxWidth,
PdfMeasurement maxHeight, PdfMeasurement margin = default(PdfMeasurement))
{
double maxWidthPts = maxWidth.AsPoints();
double maxHeightPts = maxHeight.AsPoints();
double marginPts = margin.AsPoints();
double scaleX = (maxWidthPts - 2 * marginPts) / srcRect.Width;
double scaleY = (maxHeightPts - 2 * marginPts) / srcRect.Height;
double scale = Math.Min(scaleX, scaleY);
PdfMeasurement left = margin;
PdfMeasurement right = PdfMeasurement.Points(marginPts + scale * srcRect.Width);
PdfMeasurement bottom = margin;
PdfMeasurement top = PdfMeasurement.Points(marginPts + scale * srcRect.Height);
return(new ConverterPdfRect(left, right, bottom, top));
}