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jeremybenn |
/* Scanline.java -- A scanline for the scanline converter
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Copyright (C) 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.awt.java2d;
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/**
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* Represents a scanline in the {@link ScanlineConverter}. This is basically
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* a sorted list of {@link PolyEdge}s that is made for maximum reuse.
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*/
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class Scanline
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{
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/**
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* The actual edges array. The fields can be null.
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*/
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private PolyEdge edges;
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/**
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* Clears this scanline. This only resets the number of edges to 0. The
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* actual PolyEdge objects are preserved for possible later reuse.
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*/
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void clear()
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{
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edges = null;
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}
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/**
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* Create a new Scanline.
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*/
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Scanline()
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{
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// Nothing to do.
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}
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/**
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* Inserts an edge into this scanline. This is performed in a sorted fashion,
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* and so that it reuses as much existing resources as possible.
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*/
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void addEdge(PolyEdge edge)
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{
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// Allocate PolyEdge when necessary or reuse an old one.
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edge.scanlineNext = edges;
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edges = edge;
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}
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/**
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* Returns the edges queue.
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*
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* @return the edges queue
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*/
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PolyEdge getEdges()
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{
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return edges;
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}
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}
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