private void CalcSize(IntPtr currentPage, double dpiX, double dpiY, RectangleF printableArea, bool isLandscape, out double width, out double height, out double x, out double y)
{
x = y = 0;
width = Pdfium.FPDF_GetPageWidth(currentPage) / 72 * dpiX;
height = Pdfium.FPDF_GetPageHeight(currentPage) / 72 * dpiY;
if (_useDP)
{
return;
}
//Calculate the size of the printable area in pixels
var fitSize = new SizeF(
(float)dpiX * printableArea.Width / 100.0f,
(float)dpiY * printableArea.Height / 100.0f
);
var pageSize = new SizeF(
(float)width,
(float)height
);
var rot = Pdfium.FPDFPage_GetRotation(currentPage);
bool isRotated = (rot == PageRotate.Rotate270 || rot == PageRotate.Rotate90) || (width > height);
if (AutoRotate && isRotated)
{
fitSize = new SizeF(fitSize.Height, fitSize.Width);
}
else if (!AutoRotate && isLandscape)
{
fitSize = new SizeF(fitSize.Height, fitSize.Width);
}
switch (PrintSizeMode)
{
case PrintSizeMode.Fit:
var sz = GetRenderSize(pageSize, fitSize);
width = sz.Width;
height = sz.Height;
break;
case PrintSizeMode.CustomScale:
width *= (double)Scale / 100.0;
height *= (double)Scale / 100.0;
break;
case PrintSizeMode.ActualSize:
default:
break;
}
if (AutoCenter)
{
x = (fitSize.Width - width) / 2;
y = (fitSize.Height - height) / 2;
}
}
private PageRotate CalcRotation(IntPtr currentPage, bool isLandscape, ref double width, ref double height)
{
var rot = Pdfium.FPDFPage_GetRotation(currentPage);
bool isRotated = (rot == PageRotate.Rotate270 || rot == PageRotate.Rotate90) || (width > height);
if (AutoRotate && isRotated != isLandscape)
{
double tmp = width;
width = height;
height = tmp;
return(rot == PageRotate.Rotate270 ? PageRotate.Rotate90 : PageRotate.Rotate270);
}
return(PageRotate.Normal);
}
/// <summary>
/// Raises the System.Drawing.Printing.PrintDocument.QueryPageSettings event. It
/// is called immediately before each System.Drawing.Printing.PrintDocument.PrintPage event.
/// </summary>
/// <param name="e">A System.Drawing.Printing.QueryPageSettingsEventArgs that contains the event data.</param>
protected override void OnQueryPageSettings(QueryPageSettingsEventArgs e)
{
if (AutoRotate)
{
IntPtr currentPage = Pdfium.FPDF_StartLoadPage(_docForPrint, _pageForPrint);
if (currentPage == IntPtr.Zero)
{
e.Cancel = true;
return;
}
double width = Pdfium.FPDF_GetPageWidth(currentPage);
double height = Pdfium.FPDF_GetPageHeight(currentPage);
var rotation = Pdfium.FPDFPage_GetRotation(currentPage);
bool isRotated = (/*rotation == PageRotate.Rotate270 || rotation == PageRotate.Rotate90 ||*/ width > height);
e.PageSettings.Landscape = isRotated;
if (currentPage != IntPtr.Zero)
{
Pdfium.FPDF_ClosePage(currentPage);
}
}
base.OnQueryPageSettings(e);
}