public MemoryStream ImageStripper(MemoryStream inputStream)
{
var imageStream = new MemoryStream();
PdfReader reader = new PdfReader((byte[])inputStream.ToArray());
//using (Document document = new Document(reader.GetPageSizeWithRotation(1), 0, 0, 0, 0))
//{
//document.Open();
PdfReaderContentParser parser = new PdfReaderContentParser(reader);
MyImageRenderListener listener = new MyImageRenderListener();
parser.ProcessContent(1, listener);
imageStream = new MemoryStream(listener.Image);
Console.WriteLine($"Image Type - {listener.ImageType}");
Console.WriteLine($"Width in Pixels - {listener.ImageWidthPixels}");
//document.Close();
//}
return(imageStream);
}
public MemoryStream AddVARLicenceBlocks(MemoryStream inputStream)
{
PdfReader reader = new PdfReader((byte[])inputStream.ToArray());
MemoryStream outputStream = new MemoryStream();
using (Document document = new Document(reader.GetPageSizeWithRotation(1), 0, 0, 0, 0))
{
using (PdfWriter writer = PdfWriter.GetInstance(document, outputStream))
{
document.Open();
PdfImportedPage importedPage = writer.GetImportedPage(reader, 1);
var pageRotation = reader.GetPageRotation(1);
var pageWidth = reader.GetPageSizeWithRotation(1).Width;
var pageHeight = reader.GetPageSizeWithRotation(1).Height;
var titlefont = FontFactory.GetFont(BaseFont.COURIER, 7, Font.NORMAL);
var title1 = new Paragraph(20, "Reproduced from Admiralty digital Notices to Mariners by permission of the Controller of Her Majesty’s Stationery", titlefont);
var title2 = new Paragraph("Office and the UK Hydrographic Office", titlefont);
var title1and2 = new Paragraph(20, "Reproduced from Admiralty digital Notices to Mariners by permission of the Controller of Her Majesty’s Stationery Office and the UK Hydrographic Office", titlefont);
var title3 = new Paragraph("HO " + UKHOVARLicenceNumber + " © British Crown Copyright " + UKHOCopyRightYear, titlefont);
title1.Alignment = Element.ALIGN_RIGHT;
title2.Alignment = Element.ALIGN_RIGHT;
title1and2.Alignment = Element.ALIGN_RIGHT;
title3.Alignment = Element.ALIGN_RIGHT;
title1.IndentationRight = 15;
title2.IndentationRight = 15;
title1and2.IndentationRight = 15;
title3.IndentationRight = 15;
PdfReaderContentParser parser = new PdfReaderContentParser(reader);
MyImageRenderListener listener = new MyImageRenderListener();
parser.ProcessContent(1, listener);
var imgWidth = listener.ImgWidth;
var imgHeight = listener.ImgHeight;
var ctmWidth = listener.CtmWidth;
var ctmHeight = listener.CtmHeight;
var xlocation = listener.Xlocation;
var ylocation = listener.Ylocation;
switch (pageRotation)
{
case 0:
document.Add(title1);
document.Add(title2);
document.Add(title3);
writer.DirectContent.AddTemplate(importedPage, 1f, 0, 0, 1f, 15 - xlocation, -ylocation + 15);
break;
case 90:
document.Add(title1and2);
document.Add(title3);
//Remember this page is on its side, so values are not always easy to keep track of
// 20-ylocation
// This is affecting the left hand side of the page, moving the image on the X Axis
// We moved the image as far to the left as possible, but leave a margin of 20
// pageHeight-(pageHeight-xlocation)+5
// In order for the image to be in its original location, this value should be 595 == pageHeight
// We want to move the image to the bottom of the page, on the Y Axis so:
// We calculate the distance between the bottom of the image and the bottom of the page == (pageHeight-xlocation)
// We then move the image down by this amount, leaving an addition 5 for margin
writer.DirectContent.AddTemplate(importedPage, 0, -1f, 1f, 0, 15 - ylocation, pageHeight - (pageHeight - xlocation) + 15);
break;
default:
throw new InvalidOperationException(string.Format("Unexpected page rotation: [{0}].", pageRotation));
}
writer.CloseStream = false;
document.Close();
Console.WriteLine(pageRotation + "\t" + imgWidth + "\t" + imgHeight + "\t" + xlocation + "\t" + ylocation);
}
}
outputStream.Position = 0;
return(outputStream);
}
