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Java > Open Source Codes > org > openlaszlo > iv > flash > api > shape > StrightEdgeRecord


1 /*
2  * $Id: StrightEdgeRecord.java,v 1.2 2002/02/15 23:44:28 skavish Exp $
3  *
4  * ==========================================================================
5  *
6  * The JGenerator Software License, Version 1.0
7  *
8  * Copyright (c) 2000 Dmitry Skavish (skavish@usa.net). All rights reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
18  * the documentation and/or other materials provided with the
19  * distribution.
20  *
21  * 3. The end-user documentation included with the redistribution, if
22  * any, must include the following acknowlegement:
23  * "This product includes software developed by Dmitry Skavish
24  * (skavish@usa.net, http://www.flashgap.com/)."
25  * Alternately, this acknowlegement may appear in the software itself,
26  * if and wherever such third-party acknowlegements normally appear.
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30  * For written permission, please contact skavish@usa.net.
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32  * 5. Products derived from this software may not be called "The JGenerator"
33  * nor may "The JGenerator" appear in their names without prior written
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36  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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40  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
42  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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50
51 package org.openlaszlo.iv.flash.api.shape;
52
53 import org.openlaszlo.iv.flash.util.*;
54 import org.openlaszlo.iv.flash.api.*;
55 import java.io.PrintStream JavaDoc;
56
57 /**
58  * Straight-edge record.
59  * <P>
60  * The straight-edge record stores the edge as an X-Y delta.
61  * The delta is added to the current drawing position,
62  * and this becomes the new drawing position.
63  * The edge is rendered between the old and new drawing positions.
64  * <P>
65  * Straight-edge records support three types of line:
66  * <OL>
67  * <LI>General lines.
68  * <LI>Horizontal lines.
69  * <LI>Vertical lines.
70  * </OL>
71  * General lines store both X & Y deltas, the horizontal and vertical
72  * lines store only the X delta and Y delta respectively.
73  *
74  * @author Dmitry Skavish
75  */
76 public final class StrightEdgeRecord extends FlashItem {
77
78     public static final int GENERAL_LINE = 0;
79     public static final int VERT_LINE = 1;
80     public static final int HORIZ_LINE = 2;
81
82     private int type; // type of this record
83 private int deltaX; // delta X
84 private int deltaY; // delta Y
85
86     public StrightEdgeRecord() {}
87
88     public int getType() {
89         return type;
90     }
91
92     public void setType( int type ) {
93         this.type = type;
94     }
95
96     public int getDeltaX() {
97         return deltaX;
98     }
99
100     public void setDeltaX( int deltaX ) {
101         this.deltaX = deltaX;
102     }
103
104     public int getDeltaY() {
105         return deltaY;
106     }
107
108     public void setDeltaY( int deltaY ) {
109         this.deltaY = deltaY;
110     }
111
112     /**
113      * Creates general line
114      *
115      * @param deltaX new X delta
116      * @param deltaY new Y delta
117      * @return general line
118      */
119     public static StrightEdgeRecord newLine( int deltaX, int deltaY ) {
120         StrightEdgeRecord sr = new StrightEdgeRecord();
121         sr.setType( GENERAL_LINE );
122         sr.setDeltaX( deltaX );
123         sr.setDeltaY( deltaY );
124         return sr;
125     }
126
127     /**
128      * Creates horizontal line
129      *
130      * @param deltaX new X delta
131      * @return horizontal line
132      */
133     public static StrightEdgeRecord newHLine( int deltaX ) {
134         StrightEdgeRecord sr = new StrightEdgeRecord();
135         sr.setType( HORIZ_LINE );
136         sr.setDeltaX( deltaX );
137         return sr;
138     }
139
140     /**
141      * Creates vertical line
142      *
143      * @param deltaY new Y delta
144      * @return vertical line
145      */
146     public static StrightEdgeRecord newVLine( int deltaY ) {
147         StrightEdgeRecord sr = new StrightEdgeRecord();
148         sr.setType( VERT_LINE );
149         sr.setDeltaY( deltaY );
150         return sr;
151     }
152
153     public void write( FlashOutput fob ) {
154         fob.writeBits(0x3, 2);
155         switch( type ) {
156             case GENERAL_LINE: {
157                 int nBits = Util.getMinBitsS( Util.getMax(deltaX, deltaY) );
158                 if( nBits < 3 ) nBits = 3;
159                 fob.writeBits(nBits-2, 4);
160                 fob.writeBit(1);
161                 fob.writeBits(deltaX, nBits);
162                 fob.writeBits(deltaY, nBits);
163                 break;
164             }
165             case VERT_LINE: {
166                 int nBits = Util.getMinBitsS( deltaY );
167                 if( nBits < 3 ) nBits = 3;
168                 fob.writeBits(nBits-2, 4);
169                 fob.writeBit(0);
170                 fob.writeBit(1);
171                 fob.writeBits(deltaY, nBits);
172                 break;
173             }
174             case HORIZ_LINE: {
175                 int nBits = Util.getMinBitsS( deltaX );
176                 if( nBits < 3 ) nBits = 3;
177                 fob.writeBits(nBits-2, 4);
178                 fob.writeBit(0);
179                 fob.writeBit(0);
180                 fob.writeBits(deltaX, nBits);
181                 break;
182             }
183         }
184     }
185
186     public void printContent( PrintStream JavaDoc out, String JavaDoc indent ) {
187         switch( type ) {
188             case GENERAL_LINE:
189                 out.println( indent+" line ("+deltaX+","+deltaY+")" );
190                 break;
191             case VERT_LINE:
192                 out.println( indent+" vline ("+deltaY+")" );
193                 break;
194             case HORIZ_LINE:
195                 out.println( indent+" hline ("+deltaX+")" );
196                 break;
197         }
198     }
199
200     protected FlashItem copyInto( FlashItem item, ScriptCopier copier ) {
201         ((StrightEdgeRecord)item).type = type;
202         ((StrightEdgeRecord)item).deltaX = deltaX;
203         ((StrightEdgeRecord)item).deltaY = deltaY;
204         return item;
205     }
206
207     public FlashItem getCopy( ScriptCopier copier ) {
208         return copyInto( new StrightEdgeRecord(), copier );
209     }
210 }
211
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