private void CleanUpPage(int pageNum, IList <PdfCleanUpLocation> cleanUpLocations)
{
if (cleanUpLocations.Count == 0)
{
return;
}
PdfReader pdfReader = pdfStamper.Reader;
PdfDictionary page = pdfReader.GetPageN(pageNum);
PdfContentByte canvas = pdfStamper.GetUnderContent(pageNum);
byte[] pageContentInput = ContentByteUtils.GetContentBytesForPage(pdfReader, pageNum);
page.Remove(PdfName.CONTENTS);
canvas.SaveState();
PdfCleanUpRegionFilter filter = CreateFilter(cleanUpLocations);
PdfCleanUpRenderListener pdfCleanUpRenderListener = new PdfCleanUpRenderListener(pdfStamper, filter);
pdfCleanUpRenderListener.RegisterNewContext(pdfReader.GetPageResources(page), canvas);
PdfContentStreamProcessor contentProcessor = new PdfContentStreamProcessor(pdfCleanUpRenderListener);
PdfCleanUpContentOperator.PopulateOperators(contentProcessor, pdfCleanUpRenderListener);
contentProcessor.ProcessContent(pageContentInput, page.GetAsDict(PdfName.RESOURCES));
pdfCleanUpRenderListener.PopContext();
canvas.RestoreState();
ColorCleanedLocations(canvas, cleanUpLocations);
if (redactAnnotIndirRefs != null) // if it isn't null, then we are in "extract locations from redact annots" mode
{
DeleteRedactAnnots(pageNum);
}
}
public PdfCleanUpRenderListener(PdfStamper pdfStamper, PdfCleanUpRegionFilter filter)
{
this.pdfStamper = pdfStamper;
this.filter = filter;
}
public PdfCleanUpRenderListener(PdfStamper pdfStamper, PdfCleanUpRegionFilter filter) {
this.pdfStamper = pdfStamper;
this.filter = filter;
}
public PdfCleanUpRenderListener(PdfStamper pdfStamper, PdfCleanUpRegionFilter filter)
{
this.pdfStamper = pdfStamper;
this.filter = filter;
InitClippingPath();
}
public PdfCleanUpRenderListener(PdfStamper pdfStamper, PdfCleanUpRegionFilter filter) {
this.pdfStamper = pdfStamper;
this.filter = filter;
InitClippingPath();
}