private static void FitAndPositionMultiplePagesOnSinglePage(string resultFileName)
{
string initialDocument = InputFileMultipageDocument;
string resultDocument = Path.Combine(ResultDirName, resultFileName);
using (PdfStreamWriter fileWriter = new PdfStreamWriter(File.OpenWrite(resultDocument)))
{
using (PdfFileSource fileSource = new PdfFileSource(File.OpenRead(initialDocument)))
{
double halfWidth = fileSource.Pages[0].Size.Width / 2;
double halfHeight = fileSource.Pages[0].Size.Height / 2;
Vector[] translateDirections = new Vector[] { new Vector(0, 0), new Vector(1, 0), new Vector(0, 1), new Vector(1, 1) };
PdfPageStreamWriter resultPage = null;
for (int i = 0; i < fileSource.Pages.Length; i++)
{
if (i % 4 == 0)
{
if (i > 0)
{
resultPage.Dispose();
}
resultPage = fileWriter.BeginPage(fileSource.Pages[0].Size, fileSource.Pages[0].Rotation);
resultPage.ContentPosition.Scale(0.5, 0.5);
}
Vector direction = translateDirections[i % 4];
resultPage.ContentPosition.Translate(direction.X * halfWidth, direction.Y * halfHeight);
PdfPageSource sourcePage = fileSource.Pages[i];
resultPage.WriteContent(sourcePage);
}
resultPage.Dispose();
}
}
}
