| /* |
| * Copyright (c) 1998, 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.awt.geom; |
| |
| final class CurveLink { |
| Curve curve; |
| double ytop; |
| double ybot; |
| int etag; |
| |
| CurveLink next; |
| |
| public CurveLink(Curve curve, double ystart, double yend, int etag) { |
| this.curve = curve; |
| this.ytop = ystart; |
| this.ybot = yend; |
| this.etag = etag; |
| if (ytop < curve.getYTop() || ybot > curve.getYBot()) { |
| throw new InternalError("bad curvelink ["+ytop+"=>"+ybot+"] for "+curve); |
| } |
| } |
| |
| public boolean absorb(CurveLink link) { |
| return absorb(link.curve, link.ytop, link.ybot, link.etag); |
| } |
| |
| public boolean absorb(Curve curve, double ystart, double yend, int etag) { |
| if (this.curve != curve || this.etag != etag || |
| ybot < ystart || ytop > yend) |
| { |
| return false; |
| } |
| if (ystart < curve.getYTop() || yend > curve.getYBot()) { |
| throw new InternalError("bad curvelink ["+ystart+"=>"+yend+"] for "+curve); |
| } |
| this.ytop = Math.min(ytop, ystart); |
| this.ybot = Math.max(ybot, yend); |
| return true; |
| } |
| |
| public boolean isEmpty() { |
| return (ytop == ybot); |
| } |
| |
| public Curve getCurve() { |
| return curve; |
| } |
| |
| public Curve getSubCurve() { |
| if (ytop == curve.getYTop() && ybot == curve.getYBot()) { |
| return curve.getWithDirection(etag); |
| } |
| return curve.getSubCurve(ytop, ybot, etag); |
| } |
| |
| public Curve getMoveto() { |
| return new Order0(getXTop(), getYTop()); |
| } |
| |
| public double getXTop() { |
| return curve.XforY(ytop); |
| } |
| |
| public double getYTop() { |
| return ytop; |
| } |
| |
| public double getXBot() { |
| return curve.XforY(ybot); |
| } |
| |
| public double getYBot() { |
| return ybot; |
| } |
| |
| public double getX() { |
| return curve.XforY(ytop); |
| } |
| |
| public int getEdgeTag() { |
| return etag; |
| } |
| |
| public void setNext(CurveLink link) { |
| this.next = link; |
| } |
| |
| public CurveLink getNext() { |
| return next; |
| } |
| } |