1/* 2 * Copyright (c) 2001, 2008, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package sun.awt.image; 27 28import java.awt.Point; 29import java.awt.Rectangle; 30import java.awt.Image; 31import java.awt.image.DataBuffer; 32import java.awt.image.DataBufferByte; 33import java.awt.image.DataBufferUShort; 34import java.awt.image.DataBufferInt; 35import java.awt.image.SampleModel; 36import java.awt.image.WritableRaster; 37 38import sun.java2d.StateTrackable.State; 39import sun.java2d.SurfaceData; 40import sun.java2d.StateTrackableDelegate; 41 42/** 43 * This class exists as a middle layer between WritableRaster and its 44 * implementation specific subclasses (ByteComponentRaster, ShortBandedRaster, 45 * etc). 46 * It provides utilities to steal the data arrays from the standard DataBuffer 47 * types and also steals the StateTrackableDelegate from the associated 48 * DataBuffer so that it can be updated when the data is changed. 49 */ 50public class SunWritableRaster extends WritableRaster { 51 private static DataStealer stealer; 52 53 public static interface DataStealer { 54 public byte[] getData(DataBufferByte dbb, int bank); 55 public short[] getData(DataBufferUShort dbus, int bank); 56 public int[] getData(DataBufferInt dbi, int bank); 57 public StateTrackableDelegate getTrackable(DataBuffer db); 58 public void setTrackable(DataBuffer db, StateTrackableDelegate trackable); 59 } 60 61 public static void setDataStealer(DataStealer ds) { 62 if (stealer != null) { 63 throw new InternalError("Attempt to set DataStealer twice"); 64 } 65 stealer = ds; 66 } 67 68 public static byte[] stealData(DataBufferByte dbb, int bank) { 69 return stealer.getData(dbb, bank); 70 } 71 72 public static short[] stealData(DataBufferUShort dbus, int bank) { 73 return stealer.getData(dbus, bank); 74 } 75 76 public static int[] stealData(DataBufferInt dbi, int bank) { 77 return stealer.getData(dbi, bank); 78 } 79 80 public static StateTrackableDelegate stealTrackable(DataBuffer db) { 81 return stealer.getTrackable(db); 82 } 83 84 public static void setTrackable(DataBuffer db, StateTrackableDelegate trackable) { 85 stealer.setTrackable(db, trackable); 86 } 87 88 public static void makeTrackable(DataBuffer db) { 89 stealer.setTrackable(db, StateTrackableDelegate.createInstance(State.STABLE)); 90 } 91 92 public static void markDirty(DataBuffer db) { 93 stealer.getTrackable(db).markDirty(); 94 } 95 96 public static void markDirty(WritableRaster wr) { 97 if (wr instanceof SunWritableRaster) { 98 ((SunWritableRaster) wr).markDirty(); 99 } else { 100 markDirty(wr.getDataBuffer()); 101 } 102 } 103 104 public static void markDirty(Image img) { 105 SurfaceData.getPrimarySurfaceData(img).markDirty(); 106 } 107 108 private StateTrackableDelegate theTrackable; 109 110 public SunWritableRaster(SampleModel sampleModel, Point origin) { 111 super(sampleModel, origin); 112 theTrackable = stealTrackable(dataBuffer); 113 } 114 115 public SunWritableRaster(SampleModel sampleModel, 116 DataBuffer dataBuffer, 117 Point origin) 118 { 119 super(sampleModel, dataBuffer, origin); 120 theTrackable = stealTrackable(dataBuffer); 121 } 122 123 public SunWritableRaster(SampleModel sampleModel, 124 DataBuffer dataBuffer, 125 Rectangle aRegion, 126 Point sampleModelTranslate, 127 WritableRaster parent) 128 { 129 super(sampleModel, dataBuffer, aRegion, sampleModelTranslate, parent); 130 theTrackable = stealTrackable(dataBuffer); 131 } 132 133 /** 134 * Mark the TrackableDelegate of the associated DataBuffer dirty. 135 */ 136 public final void markDirty() { 137 theTrackable.markDirty(); 138 } 139} 140