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。

グラフィックス

PDFlib で、さまざまな基本的なベクターグラフィックを作成するサンプルプログラムです。

線、カーブ、円、円弧、矩形を現在の線幅、色を使って描きます。また、矩形をフィルします。線、円弧により閉じたパスを描き、塗り潰します。矩形を描き、クリッピングパスとして使います。定義されたクリッピングパスを使用して円を描き、塗り潰します。


/*
 * Starter Graphics:
 * Create some basic examples of vector graphics
 * 
 * Stroke a line, curve, circle, arc, and rectangle using the current line width
 * and stroke color. Stroke and fill a rectangle. 
 * Draw an arc segment by drawing a line and an arc, closing the path and
 * filling and stroking it.
 * Draw a rectangle and use it as the clipping a path. Draw and fill a circle
 * using the clipping path defined. 
 *
 * Required software: PDFlib/PDFlib+PDI/PPS 9
 * Required data: none
 */
package com.pdflib.cookbook.pdflib.graphics;

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

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

        double xt=20, x = 210, y=770, dy=90;

        pdflib p = null;

        int font;
        int exitcode = 0;

        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);
            
            /* Load the font. */
            font = p.load_font("Helvetica", "unicode", "");
            if (font == -1)
                throw new Exception("Error: " + p.get_errmsg());
            
            /* Start an A4 page */
            p.begin_page_ext(0, 0, "width=a4.width height=a4.height");
            
            /* Set the font */
            p.setfont(font, 14);
            
            /* Set the line width */
            p.setlinewidth(2.0);
            
            /* Set the stroke color */
            p.setcolor("stroke", "rgb", 0.0, 0.5, 0.5, 0.0);
            
            /* Set the fill color */
            p.setcolor("fill", "rgb", 0.0, 0.85, 0.85, 0.0);

            
            /* -------------
             * Stroke a line
             * -------------
             */
     
            /* Set the current point for graphics output */
            p.moveto(x, y);
            
            /* Draw a line from the current point to the supplied point */
            p.lineto(x+300, y+50);

            /* Stroke the path using the current line width and stroke color, and
             * clear it
             */
            p.stroke();
            
            /* Output some descriptive black text */
            p.fit_textline("lineto() and stroke()", xt, y, "fillcolor={gray 0}");
            
            
            /* --------------
             * Stroke a curve
             * --------------
             */
     
           /* Set the current point for graphics output */
            p.moveto(x, y-=dy);
            
            /* Draw a B?zier curve from the current point to (x3, y3), using three
             * control points
             */
            p.curveto(x+50, y+40, x+200, y+80, x+300, y+30);

            /* Stroke the path using the current line width and stroke color, and
             * clear it
             */
            p.stroke();
            
            /* Output some descriptive black text */
            p.fit_textline("curveto() and stroke()", xt, y, "fillcolor={gray 0}");
            
             
            /* ---------------
             * Stroke a circle
             * ---------------
             */
     
            /* Draw a circle at position (x, y) with a radius of 40 */
            p.circle(x, y-=dy, 40);
            
            /* Stroke the path using the current line width and stroke color, and
             * clear it
             */
            p.stroke();
            
            /* Output some descriptive black text */
            p.fit_textline("circle() and stroke()", xt, y, "fillcolor={gray 0}");
            
            
            /* ---------------------
             * Stroke an arc segment
             * ---------------------
             */
     
            /* Draw an arc segment counterclockwise at position (x, y) with a radius
             * of 40 starting at an angle of 90 degrees and ending at 180 degrees
             */
            p.arc(x, y-=dy+20, 40, 90, 180);
            
            /* Stroke the path using the current line width and stroke color, and
             * clear it
             */
            p.stroke();
            
            /* Output some descriptive black text */
            p.fit_textline("arc() and stroke()", xt, y, "fillcolor={gray 0}");
            
            
            /* ------------------
             * Stroke a rectangle
             * ------------------
             */
     
            /* Draw a rectangle at position (x, y) with a width of 200 and a height
             * of 50
             */
            p.rect(x, y-=dy, 200, 50);
            
            /* Stroke the path using the current line width and stroke color, and
             * clear it
             */
            p.stroke();
            
            /* Output some descriptive black text */
            p.fit_textline("rect() and stroke()", xt, y, "fillcolor={gray 0}");
            
                 
            /* ----------------
             * Fill a rectangle
             * ----------------
             */
     
            /* Draw a rectangle at position (x, y) with a width of 200 and a height
             * of 50
             */
            p.rect(x, y-=dy, 200, 50);
            
            /* Fill the path using current fill color, and clear it */
            p.fill();
            
            /* Output some descriptive black text */
            p.fit_textline("rect() and fill()", xt, y, "fillcolor={gray 0}");
            
            
            /* ---------------------------
             * Fill and stroke a rectangle
             * ---------------------------
             */
     
            /* Draw a rectangle at position (x, y) with a width of 200 and a height
             * of 50
             */
            p.rect(x, y-=dy, 200, 50);
            
            /* Fill and stroke the path using the current line width, fill color,
             * and stroke color, and clear it
             */
            p.fill_stroke();
            
            /* Output some descriptive black text */
            p.fit_textline("rect() and fill_stroke()", xt, y, "fillcolor={gray 0}");
            
            
            /* -------------------------------------------------------------
             * Draw a line and an arc, close the path and fill and stroke it
             * -------------------------------------------------------------
             */
     
            /* Set the current point for graphics output */
            p.moveto(x-40, y-=dy);
            
            /* Draw a line from the current point to the supplied point */
            p.lineto(x, y);
            
            /* Draw an arc segment counterclockwise at position (x, y) with a radius
             * of 40 starting at an angle of 90 degrees and ending at 180 degrees
             */
            p.arc(x, y, 40, 90, 180);

            /* Close the path and stroke and fill it, i.e. close the current subpath
             * (add a straight line segment from the current point to the starting
             * point of the path), and stroke and fill the complete current path
             */
            p.closepath_fill_stroke();
            
            /* Output some descriptive black text */
            p.fit_textline("lineto(), arc(), and", xt, y+20, "fillcolor={gray 0}");
            p.fit_textline("closepath_fill_stroke()", xt, y, "fillcolor={gray 0}");
            
            
            /* -----------------------------------------------------------------
             * Draw a rectangle and use it as the clipping a path. Draw and fill
             * a circle and clip it according to the clipping path defined. 
             * -----------------------------------------------------------------
             */
            
            /* Save the current graphics state including the current clipping
             * path which is set to the entire page by default
             */
            p.save();
           
            /* Draw a rectangle at position (x, y) with a width of 200 and a height
             * of 50
             */
            p.rect(x, y-=dy, 200, 50);
            
            /* Use the current path as the clipping path for subsequent operations
             */
            p.clip();
     
            /* Draw a circle at position (x, y) with a radius of 100 */
            p.circle(x, y, 80);
            
            /* Fill the path with the current fill color and clear it
             */
            p.fill();
            
            /* Restore the graphics state which has been saved above */
            p.restore();
            
            /* Output some descriptive black text */
            p.fit_textline("rect(), clip(),", xt, y+20, "fillcolor={gray 0}");
            p.fit_textline("circle(), and fill()", xt, y, "fillcolor={gray 0}");
            
            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)