Java example source code file (DrawPolygons.java)

This example Java source code file (DrawPolygons.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

compositetype, drawpolygons, graphicsprimitive, internalerror, java2d, string, surfacedata, surfacetype, tracedrawpolygons

The DrawPolygons.java Java example source code

/*
 * Copyright (c) 1997, 2002, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @author Charlton Innovations, Inc.
 */

package sun.java2d.loops;

import sun.java2d.loops.GraphicsPrimitive;
import sun.java2d.SunGraphics2D;
import sun.java2d.SurfaceData;

/**
 *   DrawPolygons
 *   1) draw single-width line polygons onto destination surface
 *   2) must accept output area [x, y, dx, dy]
 *      from within the surface description data for clip rect
 */
public class DrawPolygons extends GraphicsPrimitive
{
    public final static String methodSignature = "DrawPolygons(...)".toString();

    public final static int primTypeID = makePrimTypeID();

    public static DrawPolygons locate(SurfaceType srctype,
                                      CompositeType comptype,
                                      SurfaceType dsttype)
    {
        return (DrawPolygons)
            GraphicsPrimitiveMgr.locate(primTypeID,
                                        srctype, comptype, dsttype);
    }

    protected DrawPolygons(SurfaceType srctype,
                           CompositeType comptype,
                           SurfaceType dsttype)
    {
        super(methodSignature, primTypeID, srctype, comptype, dsttype);
    }

    public DrawPolygons(long pNativePrim,
                        SurfaceType srctype,
                        CompositeType comptype,
                        SurfaceType dsttype)
    {
        super(pNativePrim, methodSignature, primTypeID, srctype, comptype, dsttype);
    }

    /**
     *   All DrawPolygon implementors must have this invoker method
     */
    public native void DrawPolygons(SunGraphics2D sg2d, SurfaceData sData,
                                    int xPoints[], int yPoints[],
                                    int nPoints[], int numPolys,
                                    int transX, int transY,
                                    boolean close);

    public GraphicsPrimitive makePrimitive(SurfaceType srctype,
                                           CompositeType comptype,
                                           SurfaceType dsttype)
    {
        // REMIND: use FillSpans or converter object?
        throw new InternalError("DrawPolygons not implemented for "+
                                srctype+" with "+comptype);
    }

    public GraphicsPrimitive traceWrap() {
        return new TraceDrawPolygons(this);
    }

    private static class TraceDrawPolygons extends DrawPolygons {
        DrawPolygons target;

        public TraceDrawPolygons(DrawPolygons target) {
            super(target.getSourceType(),
                  target.getCompositeType(),
                  target.getDestType());
            this.target = target;
        }

        public GraphicsPrimitive traceWrap() {
            return this;
        }

        public void DrawPolygons(SunGraphics2D sg2d, SurfaceData sData,
                                 int xPoints[], int yPoints[],
                                 int nPoints[], int numPolys,
                                 int transX, int transY,
                                 boolean close)
        {
            tracePrimitive(target);
            target.DrawPolygons(sg2d, sData,
                                xPoints, yPoints, nPoints, numPolys,
                                transX, transY, close);
        }
    }
}