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。

サポートされるカラースペースを使用した PDFlib の簡単なサンプルプログラムです。

  • テキストやベクターグラフィックに次のカラースペースを適用します。
  • gray、rgb、cmyk、iccbasedgray/rgb/cmyk、spot、lab、pattern、shadings

/* $Id: starter_color.java,v 1.5 2012/12/10 14:38:50 stm Exp $
 * Starter color:
 * Demonstrate the basic use of supported color spaces
 * 
 * Apply the following color spaces to text and vector graphics: 
 * - gray
 * - rgb
 * - cmyk
 * - iccbasedgray/rgb/cmyk
 * - spot
 * - lab
 * - pattern
 * - shadings
 *
 * Required software: PDFlib/PDFlib+PDI/PPS 9
 * Required data: none
 */
import com.pdflib.pdflib;
import com.pdflib.PDFlibException;

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

    pdflib p = null;
    int font, spot;
    int y = 800, x = 50, xoffset1=80, xoffset2 = 100, yoffset = 70, r = 30;

    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 + " $Revision: 1.5 $");
        
        /* Load the font */
        font = p.load_font("Helvetica", "unicode", "");

        if (font == -1)
            throw new Exception("Error: " + p.get_errmsg());
        
        /* Start the page */
        p.begin_page_ext(0, 0, "width=a4.width height=a4.height");
        
        p.setfont(font, 14);
        
        /* -------------------------------------------------------------------       
         * Use default colors
         * 
         * If no special color is set the default values will be used. The 
         * default values are restored at the beginning of the page.
         * 0=black in the Gray color space is the default fill and stroke
         * color in many cases, as shown in our sample. 
         * -------------------------------------------------------------------
         */
        
        /* Fill a circle with the default black fill color */
        p.circle(x, y-=yoffset, r);
        p.fill();
        
        /* Output text with default black fill color */
        p.fit_textline("Circle and text filled with default color {gray 0}",
            x+xoffset2, y, "");
        
        p.fit_textline("1.", x+xoffset1, y, "");
        
        /* -------------------------------------------------------------------       
         * Use the Gray color space
         * 
         * Gray color is defined by Gray values between 0=black and 1=white.
         * -------------------------------------------------------------------
         */
        
        /* Using setcolor(), set the current fill color to a light gray
         * represented by (0.5, 0, 0, 0) which defines 50% gray. Since gray
         * colors are defined by only one value, the last three function
         * parameters must be set to 0. 
         */
        p.setcolor("fill", "gray", 0.5, 0, 0, 0);
        
        /* Fill a circle with the current fill color defined above */
        p.circle(x, y-=yoffset, r);
        p.fill();
        
        /* Output text with the current fill color */
        p.fit_textline("Circle and text filled with {gray 0.5}",
            x+xoffset2, y, "");
        
        /* Alternatively, you can set the fill color in the call to 
         * fit_textline() using the "fillcolor" option. This case applies the
         * fill color just the single function call. The current fill color
         * won't be affected.
         */ 
        p.fit_textline("2.", x+xoffset1, y, "fillcolor={gray 0.5}");

        
        /* ---------------------------------------------------------------------         
         * Use the RGB color space
         * 
         * RGB color is defined by RGB triples, i.e. three values between 0 and
         * 1 specifying the percentage of red, green, and blue. 
         * (0, 0, 0) is black and (1, 1, 1) is white. The commonly used RGB
         * color values in the range 0 to 255 must be divided by 255 in order to
         * scale them to the range 0 to 1 as required by PDFlib.
         * ---------------------------------------------------------------------
         */
          
        /* Use setcolor() to set the fill color to a grass-green 
         * represented by (0.1, 0.95, 0.3, 0) which defines 10% red, 95% green,
         * 30% blue. Since RGB colors are defined by only three values, the last
         * function parameter must be set to 0. 
         */
        p.setcolor("fill", "rgb", 0.1, 0.95, 0.3, 0);
        
        /* Draw a circle with the current fill color defined above */
        p.circle(x, y-=yoffset, r);
        p.fill();
        
        /* Output a text line with the RGB fill color defined above */
        p.fit_textline("Circle and text filled with {rgb 0.1 0.95 0.3}",
            x+xoffset2, y, "");
        
        /* Alternatively, you can set the fill color in the call to 
         * fit_textline() using the "fillcolor" option. This case applies the
         * fill color just the single function call. The current fill color
         * won't be affected.
         */ 
        p.fit_textline("3.", x+xoffset1, y, "fillcolor={rgb 0.1 0.95 0.3}");
        
          
        /* -------------------------------------------------------------------- 
         * Use the CMYK color space
         * 
         * CMYK color is defined by four CMYK values between 0 = no color and
         * 1 = full color representing cyan, magenta, yellow, and black values;
         * (0, 0, 0, 0) is white and (0, 0, 0, 1) is black.
         * --------------------------------------------------------------------
         */
        
        /* Use setcolor() to set the current fill color to a pale
         * orange, represented by (0.1, 0.7, 0.7, 0.1) which defines 10% Cyan, 
         * 70% Magenta, 70% Yellow, and 10% Black.
         */
        p.setcolor("fill", "cmyk", 0.1, 0.7, 0.7, 0.1);
        
        /* Fill a circle with the current fill color defined above */
        p.circle(x, y-=yoffset, r);
        p.fill();
        
        /* Output a text line with the CMYK fill color defined above */
        p.fit_textline("Circle and text filled with" +
            " {cmyk 0.1 0.7 0.7 0.1}", x+xoffset2, y, "");
        
        /* Alternatively, you can set the fill color in the call to 
         * fit_textline() using the "fillcolor" option. This case applies the
         * fill color just the single function call. The current fill color
         * won't be affected.
         */ 
        p.fit_textline("4.", x+xoffset1, y, "fillcolor={cmyk 0.1 0.7 0.7 0.1}");
        
        
        /* --------------------------------------------------------------------       
         * Use a Lab color
         * 
         * Device-independent color in the CIE L*a*b* color space is specified
         * by a luminance value in the range 0 to 100 and two color values in
         * the range -127 to 128. The first value contains the green-red axis,
         * while the second value contains the blue-yellow axis.
         * --------------------------------------------------------------------
         */
        
        /* Set the current fill color to a loud blue, represented by
         * (100, -127, -127, 0). Since Lab colors are defined by only three
         * values, the last function parameter must be set to 0.
         */
        p.setcolor("fill", "lab", 100, -127, -127, 0);
        
        /* Fill a circle with the fill color defined above */
        p.circle(x, y-=yoffset, r);
        p.fill();
        
        /* Output a text line with the Lab fill color defined above */ 
        p.fit_textline("Circle and text filled with {lab 100 -127 -127}",
            x+xoffset2, y, "");
        
        /* Alternatively, you can set the fill color in the call to 
         * fit_textline() using the "fillcolor" option. This case applies the
         * fill color just the single function call. The current fill color
         * won't be affected.
         */ 
        p.fit_textline("5.", x+xoffset1, y, "fillcolor={lab 100 -127 -127}");
        
        
        /* ---------------------------------------------------------------
         * Use an ICC based color
         * 
         * ICC-based colors are specified with the help of an ICC profile.
         * ---------------------------------------------------------------
         */
        
        /* Set the sRGB profile which is guaranteed to be always available.
         * (Accordingly, you can use  "iccprofilecmyk" or "iccprofilegray"
         * with an appropriate profile)
         */ 
    	p.set_option("iccprofilergb=sRGB");
    	
    	/* Use setcolor() with the "iccbasedrgb" color space to set the current
    	 * fill and stroke color to a grass-green, represented
    	 * by the RGB color values (0.1 0.95 0.3 0) which define 10% Red,
    	 * 95% Green, and 30% Blue. Since iccbasedrgb colors are defined by only
    	 * three values, the last function parameter must be set to 0.
         */
        p.setcolor("fill", "iccbasedrgb", 0.1, 0.95, 0.3, 0);
        
        /* Fill a circle with the ICC based RGB fill color defined above */
        p.circle(x, y-=yoffset, r);
        p.fill();
        
        /* Output a text line with the ICC based RGB fill color defined above */
        p.fit_textline("Circle and text filled with {iccbasedrgb 0.1 0.95 0.3}",
            x+xoffset2, y, "");
        
        /* Alternatively, you can set the fill color in the call to 
         * fit_textline() using the "fillcolor" option. This case applies the
         * fill color just the single function call. The current fill color
         * won't be affected.
         */ 
        p.fit_textline("6.", x+xoffset1, y, 
            "fillcolor={iccbasedrgb 0.1 0.95 0.3}");
        
            
        /* --------------------------------------------------------------------         
         * Use a spot color
         * 
         * Spot color (separation color space) is a predefined or arbitrarily
         * named custom color with an alternate representation in one of the
         * other color spaces above; this is generally used for preparing
         * documents which are intended to be printed on an offset printing
         * machine with one or more custom colors. The tint value (percentage)
         * ranges from 0 = no color to 1 = maximum intensity of the spot color.
         * --------------------------------------------------------------------
         */
                 
        /* Define the spot color "PANTONE 281 U" from the builtin color
         * library PANTONE
         */
        spot = p.makespotcolor("PANTONE 281 U");
        
        /* Set the spot color "PANTONE 281 U" with a tint value of 1 (=100%)
         * and output some text. Since spot colors are defined by only two
         * values, the last two function parameters must be set to 0.
         */
        p.setcolor("fill", "spot", spot, 1.0, 0, 0);
        
        /* Fill a circle with the ICC based RGB fill color defined above */
        p.circle(x, y-=yoffset, r);
        p.fill();
       
        p.fit_textline("Circle and text filled with " +
            "{spotname {PANTONE 281 U} 1}", x+xoffset2, y, "");
         
        /* Alternatively, you can set the fill color in the call to 
         * fit_textline() using the "fillcolor" option. This case applies the
         * fill color just the single function call. The current fill color
         * won't be affected.
         */ 
        p.fit_textline("7.", x+xoffset1, y,
            "fillcolor={spotname {PANTONE 281 U} 1}");
        
        /* or */
        p.fit_textline("7.", x+xoffset1, y, "fillcolor={spot " + spot + " 1}");
        
        
        /* ----------------------------------------------------------       
         * For using the Pattern color space, see the Cookbook topics
         * graphics/fill_pattern and images/background_pattern.
         * ----------------------------------------------------------
         */
          
        /* ---------------------------------------------------------
         * For using the Shading color space, see the Cookbook topic
         * color/color_gradient.
         * ---------------------------------------------------------
         */
    	
        p.end_page_ext("");

        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();
            }
        }
    }
}
(Apr 3, 2007 - Feb 20, 2014)