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fonts/font_metrics_info

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/* $Id: font_metrics_info.java,v 1.8 2013/01/15 10:11:58 stm Exp $
 * Font metrics info:
 * Get various font related metrics such as the ascender or descender
 *
 * Use the info_font() function to get the metrics values for the capheight,
 * ascender, descender, or xheight of the font. Visualize these metrics
 * using the "matchbox" feature.
 *
 * Required software: PDFlib/PDFlib+PDI/PPS 9
 * Required data: font file
 */
package com.pdflib.cookbook.pdflib.fonts;

import java.text.*;
import com.pdflib.pdflib;
import com.pdflib.PDFlibException;

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

    pdflib p = null;
    int font;
    double capheight, ascender, descender, xheight;
    String optlist, text = "ABCdefghij";
    int x=150, y=140;

    NumberFormat form = NumberFormat.getInstance();

    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: 1.8 $");

        /* Start page */
        p.begin_page_ext(0, 0, "width=300 height=200");

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

        /* Retrieve the font metrics for a font size of 10. If no fontsize
         * is supplied the metrics will be based on a font size of 1000.
         */
        capheight = p.info_font(font, "capheight", "fontsize=10");
        ascender = p.info_font(font, "ascender", "fontsize=10");
        descender = p.info_font(font, "descender", "fontsize=10");
        xheight = p.info_font(font, "xheight", "fontsize=10");

        /* Set the format of the metrics values to two fractional digits */
        form.setMaximumFractionDigits(2);

        p.setfont(font, 10);

        /* Output each of the font metrics with appropriate formatting as well
         * as the sample text "ABCdefghij" with the metrics value colorized
         */
        p.fit_textline("capheight for font size 10: " + form.format(capheight),
            x, y, "alignchar :");
        optlist = "matchbox={fillcolor={rgb 1 0.8 0.8} " + 
            "boxheight={capheight none}}";
        p.fit_textline(text, x+60, y, optlist);

        p.fit_textline("ascender for font size 10: " + form.format(ascender),
            x, y-=30, "alignchar :");
        optlist = "matchbox={fillcolor={rgb 1 0.8 0.8} " + 
            "boxheight={ascender none}}";
        p.fit_textline(text, x+60, y, optlist);

        p.fit_textline("descender for font size 10: " + form.format(descender),
            x, y-=30, "alignchar :");
        optlist = "matchbox={fillcolor={rgb 1 0.8 0.8} " + 
            "boxheight={none descender}}";
        p.fit_textline(text, x+60, y, optlist);

        p.fit_textline("xheight for font size 10: " + form.format(xheight),
            x, y-=30, "alignchar :");
        optlist = "matchbox={fillcolor={rgb 1 0.8 0.8} " +
            "boxheight={xheight none}}";
        p.fit_textline(text, x+60, y, optlist);

        /* Finish page */
        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();
            }
        }
    }
}