| /* Scanline.java -- A scanline for the scanline converter |
| Copyright (C) 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.java.awt.java2d; |
| |
| /** |
| * Represents a scanline in the {@link ScanlineConverter}. This is basically |
| * a sorted list of {@link PolyEdge}s that is made for maximum reuse. |
| */ |
| class Scanline |
| { |
| |
| /** |
| * The actual edges array. The fields can be null. |
| */ |
| private PolyEdge edges; |
| |
| /** |
| * Clears this scanline. This only resets the number of edges to 0. The |
| * actual PolyEdge objects are preserved for possible later reuse. |
| */ |
| void clear() |
| { |
| edges = null; |
| } |
| |
| /** |
| * Create a new Scanline. |
| */ |
| Scanline() |
| { |
| // Nothing to do. |
| } |
| |
| /** |
| * Inserts an edge into this scanline. This is performed in a sorted fashion, |
| * and so that it reuses as much existing resources as possible. |
| */ |
| void addEdge(PolyEdge edge) |
| { |
| |
| // Allocate PolyEdge when necessary or reuse an old one. |
| edge.scanlineNext = edges; |
| edges = edge; |
| } |
| |
| /** |
| * Returns the edges queue. |
| * |
| * @return the edges queue |
| */ |
| PolyEdge getEdges() |
| { |
| return edges; |
| } |
| } |