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Home Architecture, security and coding Scale a PDF using PdfSharp
Scale a PDF using PdfSharp
Written by Division by Zero   
Tuesday, 17 May 2011 10:33

In Februari I posted some code with an example of how to remove images from a PDF. If you just want to scale a PDF to another page format (this will not make the actual file smaller in size!), here's some code to show you how to do that.

// Open the PDF as a graphical object
XPdfForm form = XPdfForm.FromFile("example.PDF");
// Create a new document
PdfDocument doc2 = new PdfDocument();
doc2.Options.CompressContentStreams = true;
doc2.Options.ColorMode = PdfColorMode.Rgb;
// Loop through every page
for (int pagenumber=1;pagenumber < (form.PageCount + 1); pagenumber++)
{
// Add a new page to the new document with the right size
PdfPage page = doc2.Pages.Add();
page.Size = PageSize.A5;
// Get the graphics from the new page
// And get a rectangle exactly the size of the page
XGraphics graph = XGraphics.FromPdfPage(page);
// Go to the next page in the original document
form.PageNumber = pagenumber;
XRect rect = new XRect(0, 0, page.Width, page.Height);
// Draw the original page on the new page. This will scale
// the original to the size of the new page
// Of course you can use graph.ScaleTransform(0.5), but this is
// relevant to the size of the new page. 0.5 means that only half of
// the page is used.
graph.DrawImage(form, rect);
}
 
// Save the Pdf as another file
doc2.Save("result.pdf");
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