java - iText: Setting image interpolation for images on a page -

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i want iterate through pages of pdf , write new pdf images have interpolation set false. expecting able following, cannot find method of accessing images or rectangles on pdf page.

pdfcopy copy = new pdfcopy(document, new fileoutputstream(outfilename)); copy.newpage(); pdfreader reader = new pdfreader(infilename); for(int = 1; <= reader.getnumberofpages(); i++) {     pdfimportedpage importedpage = copy.getimportedpage(reader, i);     for(image image : importedpage.images())         image.isinterpolated(false);     copy.addpage(importedpage); } reader.close();

there is, however, no pdfimportedpage.images(). suggestions on how might otherwise same?

cheers

nik

it won't easy. there's no high-level way of doing want. you'll have enumerate resources looking xobject images, , clear /interpolate flag.

and you'll have before creating pdfimportedpage because there's no public way access resources. grr.

void removeinterpolation( int pagenum ) {   pdfdictionary page = somereader.getpagen(pagenum);   pdfdictionary resources = page.getasdict(pdfname.resources);    enumresources(resources); }  void enumresource( pdfdictionary resources) {   pdfdictionary xobjs = resources.getasdict(pdfname.xobjects);    set<pdfname> xobjnames = xobjs.getkeys();   (pdfname name : xobjnames) {      pdfstream xobjstream = xobjs.getasstream(name);      if (pdfname.form.equals( xobjstream.getasname(pdfname.subtype))) {       // xobject forms have own nested resources.       pdfdictionary nestedresources = xobjstream.getasdict(pdfname.resources);       enumresources(nestedresources);     } else {       xobjstream.remove(pdfname.interpolate);     }   } }

there's quite bit of null-checking that's skipped in above code. page doesn't have have resource dictionary, though do. ditto xobject forms. getas* functions return null if given key missing or of different type... idea.


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