The following piece of code is supposed to take an existing pdf and add a
bubble with a text in it. It works correctly when opening in Adode Reader 8
and 9. But in Reader 7, it throws "Error while parsing a Form, Type 3 font,
or Pattern". The code in bold is causing the issue but i dont know how to
fix it.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using iTextSharp.text.pdf;
using iTextSharp.text;
using System.IO;
namespace ITextPdfCheck
{
class Program
{
private static Image _GetBubbleImage(PdfContentByte cb, Font
font, string
label, float bubbleX, float bubbleY)
{
PdfTemplate boxTemplate = cb.CreateTemplate(bubbleX,
bubbleY);
boxTemplate.SetLineWidth(1);
boxTemplate.Ellipse(1, 1, bubbleX - 1, bubbleY - 1);
if (!String.IsNullOrEmpty(label))
{
boxTemplate.BeginText();
boxTemplate.SetTextRise(bubbleX / 5.0F);
boxTemplate.SetTextRenderingMode(PdfContentByte.TEXT_RENDER_MODE_STROKE);
boxTemplate.SetFontAndSize(font.BaseFont, 8);
float textWidth =
boxTemplate.GetEffectiveStringWidth(label, false);
boxTemplate.MoveText((bubbleX - textWidth) / 2,
0);
boxTemplate.ShowText(label);
boxTemplate.EndText();
boxTemplate.Stroke();
}
else
{
boxTemplate.Fill();
}
return Image.GetInstance(boxTemplate);
}
internal static PdfPCell CreateBubblePdfCell(PdfContentByte
contentByte,
string cellContent, string tagName, float bubbleX, float bubbleY, Font font,
int border)
{
Image bubbleImage = _GetBubbleImage(contentByte, font,
cellContent,
bubbleX, bubbleY);
Chunk imageChunk = new Chunk(bubbleImage, 0, 0);
if (!String.IsNullOrEmpty(tagName))
{
imageChunk.SetGenericTag(tagName);
}
PdfPCell bubbleCell = new PdfPCell(new
Phrase(imageChunk))
{
Border = border,
Padding = 0,
BackgroundColor = BaseColor.WHITE,
HorizontalAlignment = Element.ALIGN_CENTER,
VerticalAlignment = Element.ALIGN_TOP
};
return bubbleCell;
}
private static PdfTemplate _GetBubbleTemplate(Font _Font,
PdfContentByte
cb, string label, int bubbleX, int bubbleY, string tagName)
{
PdfTemplate pdfTemplate = cb.CreateTemplate(bubbleX +
2, bubbleY + 2);
PdfPTable pdfPTable = new PdfPTable(1);
pdfPTable.SetTotalWidth(new float[] { bubbleX });
PdfPCell pdfPCell = CreateBubblePdfCell(cb, label,
tagName, bubbleX,
bubbleY, _Font, 0);
pdfPTable.AddCell(pdfPCell);
pdfPTable.WriteSelectedRows(0, -1, 0,
pdfPTable.TotalHeight,
pdfTemplate);
return pdfTemplate;
}
static void Main(string[] args)
{
Document document = new Document();
Font _Font = FontFactory.GetFont(FontFactory.HELVETICA);
try
{
using (MemoryStream localMemoryStream = new
MemoryStream())
{
PdfReader pdfReader = new
PdfReader(File.ReadAllBytes(@"test.pdf"));
PdfWriter pdfWriter =
PdfWriter.GetInstance(document,
localMemoryStream);
document.Open();
PdfImportedPage pdfImportedPage =
pdfWriter.GetImportedPage(pdfReader,
1);
PdfContentByte cb =
pdfWriter.DirectContent;
cb.AddTemplate(pdfImportedPage, 0, 0);
cb.AddTemplate(_GetBubbleTemplate(_Font, cb, "A", 20, 20, ""), 101,
101);
pdfReader.Close();
document.Close();
File.WriteAllBytes(@"test1.pdf",
localMemoryStream.GetBuffer());
}
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
document.Close();
}
}
}
--
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