PDFlib

高度なPDFアプリケーションの開発を支援する定番プログラムライブラリー Supported by インフォテック株式会社

PDFlib サンプル集(クックブック)

本サンプルプログラムは、PDF 文書生成ライブラリーの実装である PDFlib の基本的な機能を実際のプログラムで紹介したものです。

本サイトでダウンロードした PDFlib は、一部機能の制限を除き、評価版として無償でお使いいただけます。

イメージの大きさ

PDFlib で、さまざまな大きさのイメージを配置するサンプルプログラムです。

matchbox オプションを使用してイメージのサイズを取得し、そのオリジナルサイズでイメージを配置します。また、イメージの右に直接テキストを表示します。

ボックス内にイメージをフィットさせ、ボックスのサイズを使って、イメージに合うよう直接中央に配置します。

イメージのサイズを持つページを作成して、ページを完全に覆うようにイメージを配置します。


/*
 * Image dimensions:
 * Get the dimensions of an image for various purposes
 *
 * Place an image in its original size, retrieve its dimensions using the
 * "matchbox" option and place text directly to the right of the image. Fit an
 * image into a box and use the box dimensions to center text directly below
 * the image. Create a page with the dimensions of an image and place the image
 * so that it covers the page completely.
 *
 * Required software: PDFlib/PDFlib+PDI/PPS 9
 * Required data: image file
 */
package com.pdflib.cookbook.pdflib.images;

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

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

        pdflib p = null;
        int exitcode = 0;
        String imagefile = "websurfer.jpg";
        String imagefile2 = "nesrin.jpg";
        int font, image;
        double x2 = 0.0, y2 = 0.0, y3 = 0.0;
        double imagewidth, imageheight;

        try {
            p = new pdflib();

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

            /* 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);

            /* On page 1, place an image in its original size, retrieve its
             * dimensions using the "matchbox" option and place text directly
             * to the right of the image
             */
            p.begin_page_ext(0, 0, "width=100 height=100");

            /* Load the image */
            image = p.load_image("auto", imagefile, "");
            if (image == -1)
                throw new Exception("Error: " + p.get_errmsg());

            /* Fit the image with a matchbox called "web" respresenting
             * the image dimensions */
            p.fit_image(image, 20, 20, "matchbox={name=web}");
            p.close_image(image);

            /* Retrieve the coordinates of the lower right (x2, y2) and upper right
             * (x3, Y3) image corners via the matchbox "web" specified above
             */
            if ((int) p.info_matchbox("web", 1, "exists") == 1)
            {
                x2 = p.info_matchbox("web", 1, "x2");
                y2 = p.info_matchbox("web", 1, "y2");
                y3 = p.info_matchbox("web", 1, "y3");
            }

            font = p.load_font("Helvetica", "unicode", "");
            if (font == -1)
                throw new Exception("Error: " + p.get_errmsg());

            /* Start the text line in x direction at the lower right corner of the
             * image and in y direction 1/4 of the image height up
             */
            p.fit_textline("www.kraxi.com", x2, y2 + (y3 - y2)/4, "font=" + font +
                " fontsize=8");

            p.end_page_ext("");

            /* On page 2, fit an image into a box and use the box dimensions to
             * center text directly below the image
             */
            p.begin_page_ext(0, 0, "width=100 height=100");

            /* Load the image */
            image = p.load_image("auto", imagefile2, "");
            if (image == -1)
                throw new Exception("Error: " + p.get_errmsg());

            /* Fit the image with a matchbox called "web" respresenting
             * the image dimension
             */
            p.fit_image(image, 10, 20, "boxsize={80 50} position={center bottom} " +
                "fitmethod=meet");
            p.close_image(image);

            font = p.load_font("Helvetica", "unicode", "");
            if (font == -1)
                throw new Exception("Error: " + p.get_errmsg());

            /* Start the text line in x direction at the lower right corner of the
             * image and in y direction 1/4 of the image height up
             */
            p.fit_textline("My holiday photo", 10, 10,
                "boxsize={80 50} position={center bottom} font=" + font +
                " fontsize=8");

            p.end_page_ext("");

            /* Create page 3 with the original dimensions of the image and place
             * the image so that it covers the page completely
             *
             * Load the image
             */
            image = p.load_image("auto", imagefile2, "");
            if (image == -1)
                throw new Exception("Error: " + p.get_errmsg());

            /* Get the width and height of the image */
            imagewidth = p.info_image(image, "imagewidth", "");
            imageheight = p.info_image(image, "imageheight", "");

            /* Start page 3 with the dimensions of the image to be placed */
            p.begin_page_ext(imagewidth, imageheight, "");

            /* Fit the image */
            p.fit_image(image, 0, 0, "");

            p.close_image(image);

            p.end_page_ext("");

            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);
        }
    }
}
(Apr 3, 2007 - May 23, 2019)