PDFlib Cookbook

cookbook

pdf_import/scale_down_imported_pages

Place A4 pages from an imported PDF as A5 pages in the output document.

Download Java Code  Switch to PHP Code  Show Output 

/*
 * Scale down imported pages:
 * Place A4 pages from an imported PDF as A5 pages in the output document
 * 
 * Import the pages of an A4 document and output them unchanged. Then, place
 * them in the output document while scaling them down to A5. 
 *
 * Required software: PDFlib+PDI/PPS 9
 * Required data: PDF document
 */
package com.pdflib.cookbook.pdflib.pdf_import;

import com.pdflib.pdflib;
import com.pdflib.PDFlibException;

public class scale_down_imported_pages
{
    public static void main (String argv[])
    {
        /* This is where the data files are. Adjust as necessary. */
        String searchpath = "../input";

        /* By default annotations are also imported. In some cases this
         * requires the Noto fonts for creating annotation appearance streams.
         * We therefore set the searchpath to also point to the font directory.
         */
        String fontpath = "../resource/font";
        String outfile = "scale_down_imported_pages.pdf";
        String title = "Scale down Imported Pages";

        pdflib p = null;
        int exitcode = 0;
        String pdffile = "pCOS-datasheet.pdf";
        int indoc, pageno, endpage, page;

        try {
            p = new pdflib();

            p.set_option("searchpath={" + searchpath + "}");

            p.set_option("searchpath={" + fontpath + "}");

            /* This means we must check return values of load_font() etc. */
            p.set_option("errorpolicy=return");

            if (p.begin_document(outfile, "") == -1)
                throw new Exception("Error: " + p.get_errmsg());

            p.set_info("Creator", "PDFlib Cookbook");
            p.set_info("Title", title);

            /* Open the input PDF having A4 page size */
            indoc = p.open_pdi_document(pdffile, "");
            if (indoc == -1)
                throw new Exception("Error: " + p.get_errmsg());

            endpage = (int) p.pcos_get_number(indoc, "length:pages");

            /* Loop over all pages of the input document:
             * Place the imported page without any scaling
             */
            for (pageno = 1; pageno <= endpage; pageno++)
            {
                page = p.open_pdi_page(indoc, pageno, "");

                if (page == -1)
                    throw new Exception("Error: " + p.get_errmsg());
                
                /* Start an A4 output page (210mm x 297mm) */
                p.begin_page_ext(0, 0, "width=a4.width height=a4.height");
                
                /* Place the imported page without any scaling */
                p.fit_pdi_page(page, 0, 0, "");
                
                p.end_page_ext("");
                
                p.close_pdi_page(page);
            }
            
            /* Loop over all pages of the input document:
             * Place the imported page while scaling it down to A5
             */
            for (pageno = 1; pageno <= endpage; pageno++)
            {
                page = p.open_pdi_page(indoc, pageno, "");

                if (page == -1)
                    throw new Exception("Error: " + p.get_errmsg());
                
                /* Start an A5 output page (148mm x 210mm) */
                p.begin_page_ext(421, 595, "");

                /* Place the imported page while scaling it down to A5 */
                p.fit_pdi_page(page, 0, 0, "boxsize={421 595} fitmethod=meet");
                
                p.end_page_ext("");
                
                p.close_pdi_page(page);
            }
      
            p.end_document("");

        } catch (PDFlibException e) {
            System.err.println("PDFlib exception occurred:");
            System.err.println("[" + e.get_errnum() + "] " + e.get_apiname()
                + ": " + e.get_errmsg());
            exitcode = 1;
        } catch (Exception e) {
            System.err.println(e);
            exitcode = 1;
        } finally {
            if (p != null) {
                p.delete();
            }
            System.exit(exitcode);
        }
    }
}