Java example source code file (DrawPath.java)

This example Java source code file (DrawPath.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

awt, compositetype, drawpath, geometry, graphicsprimitive, internalerror, java2d, string, surfacedata, surfacetype, tracedrawpath

The DrawPath.java Java example source code

/*
 * Copyright (c) 2005, 2006, 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.
 */

package sun.java2d.loops;

import sun.java2d.loops.GraphicsPrimitive;
import sun.java2d.SunGraphics2D;
import sun.java2d.SurfaceData;
import java.awt.geom.Path2D;

/**
 *   DrawPath
 *   1. draw single-width line path onto destination surface
 *   2. must accept output area [x, y, dx, dy]
 *      from within the surface description data for clip rect
 */
public class DrawPath extends GraphicsPrimitive {

    public final static String methodSignature =
        "DrawPath(...)".toString();

    public final static int primTypeID = makePrimTypeID();

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

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

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


    /**
     *   All DrawPath implementors must have this invoker method
     */
    public native void DrawPath(SunGraphics2D sg2d, SurfaceData sData,
                                int transX, int transY,
                                Path2D.Float p2df);

    public GraphicsPrimitive makePrimitive(SurfaceType srctype,
                                           CompositeType comptype,
                                           SurfaceType dsttype)
    {
        throw new InternalError("DrawPath not implemented for "+
                                srctype+" with "+comptype);
    }

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

    private static class TraceDrawPath extends DrawPath {
        DrawPath target;

        public TraceDrawPath(DrawPath target) {
            super(target.getSourceType(),
                  target.getCompositeType(),
                  target.getDestType());
            this.target = target;
        }

        public GraphicsPrimitive traceWrap() {
            return this;
        }

        public void DrawPath(SunGraphics2D sg2d, SurfaceData sData,
                             int transX, int transY,
                             Path2D.Float p2df)
        {
            tracePrimitive(target);
            target.DrawPath(sg2d, sData, transX, transY, p2df);
        }
    }
}