general/starter_pvf

 * PDFlib Virtual File system (PVF):

 * Create a PVF file which holds an image or PDF, and import the data from the

 * PVF file

 *

 * This avoids disk access and is especially useful when the same image or PDF

 * is imported multiply. For examples, images which sit in a database don't

 * have to be written and re-read from disk, but can be passed to PDFlib

 * directly in memory. A similar technique can be used for loading other data

 * such as fonts, ICC profiles, etc.

 *

 * Required software: PDFlib Lite/PDFlib/PDFlib+PDI/PPS 7

 * Required data: image file

 */

package com.pdflib.cookbook.pdflib.general;

import java.io.*;

import com.pdflib.pdflib;

import com.pdflib.PDFlibException;

public class starter_pvf

{

    public static void main (String argv[])

    {

    /* This is where the data files are. Adjust as necessary. */

    String searchpath = "../input";

    String outfile = "starter_pvf.pdf";

    String title = "PDFlib Virtual File System";

    pdflib p = null;

    FileInputStream fis;

    byte[] imageData = null;

    try {

        p = new pdflib();

        p.set_parameter("SearchPath", searchpath);

        /* This means we must check return values of load_font() etc. */

        p.set_parameter("errorpolicy", "return");

        /* Set an output path according to the name of the topic */

        if (p.begin_document(outfile, "") == -1)

            throw new Exception("Error: " + p.get_errmsg());

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

        p.set_info("Title", title + " $Revision: 1.10 $");

        /* We just read some image data from a file; to really benefit

         * from using PVF read the data from a Web site or a database instead

         */

        fis = new FileInputStream("../input/PDFlib-logo.tif");

        imageData = new byte[fis.available()];

        fis.read(imageData);

        p.create_pvf("/pvf/image", imageData, "");

        /* Load the image from the PVF */

        int image = p.load_image("auto", "/pvf/image" , "");

        if (image == -1)

            throw new Exception("Error: " + p.get_errmsg());

        /* Fit the image on page 1 */

        p.begin_page_ext(595, 842, "");

        p.fit_image(image, 350, 750, "");

        p.end_page_ext("");

        /* Fit the image on page 2 */

        p.begin_page_ext(595, 842, "");

        p.fit_image(image, 350, 50, "");

        p.end_page_ext("");

        /* Delete the virtual file to free the allocated memory */

        p.delete_pvf("/pvf/image");

        p.end_document("");

        } catch (PDFlibException e) {

            System.err.print("PDFlib exception occurred:\n");

            System.err.print("[" + e.get_errnum() + "] " + e.get_apiname() +

                ": " + e.get_errmsg() + "\n");

        } catch (Exception e) {

            System.err.println(e.getMessage());

        } finally {

            if (p != null) {

                p.delete();

            }

        }

    }

}