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graphics/starter_graphics

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/* $Id: starter_graphics.java,v 1.3 2013/01/15 10:11:59 stm Exp $

 * 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;


    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: 1.3 $");

       

        /* 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);

       

       

         * 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.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();

            }

        }

    }

}