/* $Id: fill_rules.java,v 1.5 2007/10/30 16:16:33 katja Exp $
 * Fill Rules:
 * Define some overlapping vector graphics and fill them using
 * various methods
 * 
 * Use the default "nonzero winding number" rule to fill overlapping objects and
 * create a ring, for example.
 * Use the "evenodd" fill rule to make overlapping objects being
 * filled alternately. 
 * 
 * Required software: PDFlib Lite/PDFlib/PDFlib+PDI/PPS 7
 * Required data: none
 */
package com.pdflib.cookbook.pdflib.graphics;

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

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

    pdflib p = null;
    int font;

    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");

        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 $");

        /* For PDFlib Lite: change "unicode" to "winansi" */
        font = p.load_font("Helvetica", "unicode", "");
        if (font == -1)
            throw new Exception("Error: " + p.get_errmsg());
        
  
        /* --------------------------------------------------------------------
         * Case I: The default "nonzero winding number" rule will be used. All
         * defined objects will be filled with one p.fill() call. In this case
         * (without any coordinate transformation being performed), overlapping
         * objects which are drawn counterclockwise will be filled with the
         * current fill color while all objects drawn in clockwise direction
         * won't be filled. Note that p.circle() and p.rect() functions define
         * objects which will be drawn counterclockwise.
         * --------------------------------------------------------------------
         */
        
        /* Start Page 1 */
        p.begin_page_ext(0, 0, "width=a4.width height=a4.height");

        /* Set the color to purple */
        p.setcolor("fill", "rgb", 1.0, 0.0, 0.5, 0.0);
        
        /* Define a big arc segment of 360 degrees in counterclockwise 
         * direction. Move to the starting point of the arc segment first
         */
        p.moveto(450, 600);
        p.arc(300, 600, 150, 0, 360);
        
        /* Define a small arc segment of 360 degrees in counterclockwise
         * direction. Move to the starting point of the arc segment first
         */
        p.moveto(400, 600);
        p.arc(300, 600, 100, 0, 360);
        
        /* Define a big arc segment of 360 degrees in clockwise direction.
         * Move to the starting point of the arc segment first
         */
        p.moveto(450, 200);
        p.arcn(300, 200, 150, 360, 0);
        
        /* Define a small arc segment of 360 degrees in counterclockwise
         * direction. Move to the starting point of the arc segment first
         */
        p.moveto(400, 200);
        p.arc(300, 200, 100, 0, 360);
        
        p.fill_stroke();
        
        /* Set the color to black */
        p.setcolor("fill", "gray", 0, 0.0, 0, 0.0);
        
        p.setfont(font, 14);
        
        p.show_xy("With the default \"nonzero winding number\" rule:", 20, 790);
        p.show_xy("Stroke a big and a small arc segment counterclockwise " +
            "and fill them with purple", 20, 770);
        
        p.show_xy("With the default \"nonzero winding number\" rule:", 20, 400);
        p.show_xy("Stroke a big arc segment clockwise and", 20, 380);
        p.show_xy("a small arc segment counterclockwise and fill them with " +
            "purple", 20, 360);
        
        p.end_page_ext("");
        
        
        /* -----------------------------------------------------------------
         * Case II: The fill rule of "evenodd" will be used. All defined
         * objects will be filled with one p.fill() call. In this case, 
         * overlapping objects will be drawn according to the "evenodd" rule
         * and filled alternately.
         * -----------------------------------------------------------------
         */
        
        /* Start Page 2 */
        p.begin_page_ext(0, 0, "width=a4.width height=a4.height");
        
        p.set_parameter("fillrule", "evenodd");
        
        /* Set the color to purple */
        p.setcolor("fill", "rgb", 1.0, 0.0, 0.5, 0.0);
        
        /* Define a rectangle */
        p.rect(100, 100, 400, 300);
        
        /* Define a big circle */
        p.circle(300, 500, 200);
     
        /* Define an arc segment */
        p.moveto(300, 750);
        p.lineto(300, 500);
        p.arc(300, 500, 250, 0, 90);
        
        /* Define a small circle */
        p.circle(300, 600, 50);
        
        p.fill_stroke();
        
        /* Set the color to black */
        p.setcolor("fill", "gray", 0, 0.0, 0, 0.0);
        
        p.setfont(font, 14);
        
        p.show_xy("With the \"evenodd\" fill rule: Draw a rectangle, a big " +
            "circle,", 20, 810);
        p.show_xy("an arc segment, and a small circle and fill them with " +
            "purple", 20, 790);
        
        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();
            }
        }
    }
}