schourode / itextsharp-lgpl Goto Github PK
View Code? Open in Web Editor NEWiTextSharp 4.1.6. Last version to be released under the Mozilla Public License and the LGPL.
iTextSharp 4.1.6. Last version to be released under the Mozilla Public License and the LGPL.
I have a PDF file that contains an image where this image is successfully displayed. When I try to extract the image from the PDF file I get bytes, then decode them successfully (because there is /Filter/FlateDecode there). But when I try to convert these bytes to an image using different libs the exception occured (it looks like the bytes are actually not an image). As far as I understand the problem is processing these bytes, but the image in the Pdf is not corrupted because it is shown there correctly. PDF is here.
int pageNum = 1;
PdfReader pdf = new PdfReader(filename);
PdfDictionary pg = pdf.GetPageN(pageNum);
PdfDictionary res = (PdfDictionary)PdfReader.GetPdfObject(pg.Get(PdfName.RESOURCES));
PdfDictionary xobj = (PdfDictionary)PdfReader.GetPdfObject(res.Get(PdfName.XOBJECT));
if (xobj == null) { return ""; }
foreach (PdfName name in xobj.Keys)
{
PdfObject obj = xobj.Get(name);
if (!obj.IsIndirect()) { continue; }
PdfDictionary tg = (PdfDictionary)PdfReader.GetPdfObject(obj);
PdfName type = (PdfName)PdfReader.GetPdfObject(tg.Get(PdfName.SUBTYPE));
if (!type.Equals(PdfName.IMAGE)) { continue; }
int XrefIndex = Convert.ToInt32(((PRIndirectReference)obj).Number.ToString(System.Globalization.CultureInfo.InvariantCulture));
PdfObject pdfObj = pdf.GetPdfObject(XrefIndex);
PdfStream pdfStrem = (PdfStream)pdfObj;
byte[] bytes = PdfReader.GetStreamBytesRaw((PRStream)pdfStrem);
if (bytes == null) { continue; }
using (System.IO.MemoryStream memStream = new System.IO.MemoryStream(bytes))
{
memStream.Position = 0;
byte[] decodedBytes = PdfReader.FlateDecode(bytes);
/// Now libs can not process these decodedBytes as an image, exception occured.
}
}
Hello @schourode. I'm interested in upgrade this package for .NET 5 compability.
May you generate a new nuget version when the migration is completed?
Reggards.
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