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 * Copyright (c) 2001, 2008, 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
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package sun.awt.image;

import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Image;
import java.awt.image.DataBuffer;
import java.awt.image.DataBufferByte;
import java.awt.image.DataBufferUShort;
import java.awt.image.DataBufferInt;
import java.awt.image.SampleModel;
import java.awt.image.WritableRaster;

import sun.java2d.StateTrackable.State;
import sun.java2d.SurfaceData;
import sun.java2d.StateTrackableDelegate;

This class exists as a middle layer between WritableRaster and its
implementation specific subclasses (ByteComponentRaster, ShortBandedRaster,
etc).
It provides utilities to steal the data arrays from the standard DataBuffer
types and also steals the StateTrackableDelegate from the associated
DataBuffer so that it can be updated when the data is changed.
/**
 * This class exists as a middle layer between WritableRaster and its
 * implementation specific subclasses (ByteComponentRaster, ShortBandedRaster,
 * etc).
 * It provides utilities to steal the data arrays from the standard DataBuffer
 * types and also steals the StateTrackableDelegate from the associated
 * DataBuffer so that it can be updated when the data is changed.
 */
public class SunWritableRaster extends WritableRaster {
    private static DataStealer stealer;

    public static interface DataStealer {
        public byte[] getData(DataBufferByte dbb, int bank);
        public short[] getData(DataBufferUShort dbus, int bank);
        public int[] getData(DataBufferInt dbi, int bank);
        public StateTrackableDelegate getTrackable(DataBuffer db);
        public void setTrackable(DataBuffer db, StateTrackableDelegate trackable);
    }

    public static void setDataStealer(DataStealer ds) {
        if (stealer != null) {
            throw new InternalError("Attempt to set DataStealer twice");
        }
        stealer = ds;
    }

    public static byte[] stealData(DataBufferByte dbb, int bank) {
        return stealer.getData(dbb, bank);
    }

    public static short[] stealData(DataBufferUShort dbus, int bank) {
        return stealer.getData(dbus, bank);
    }

    public static int[] stealData(DataBufferInt dbi, int bank) {
        return stealer.getData(dbi, bank);
    }

    public static StateTrackableDelegate stealTrackable(DataBuffer db) {
        return stealer.getTrackable(db);
    }

    public static void setTrackable(DataBuffer db, StateTrackableDelegate trackable) {
        stealer.setTrackable(db, trackable);
    }

    public static void makeTrackable(DataBuffer db) {
        stealer.setTrackable(db, StateTrackableDelegate.createInstance(State.STABLE));
    }

    public static void markDirty(DataBuffer db) {
        stealer.getTrackable(db).markDirty();
    }

    public static void markDirty(WritableRaster wr) {
        if (wr instanceof SunWritableRaster) {
            ((SunWritableRaster) wr).markDirty();
        } else {
            markDirty(wr.getDataBuffer());
        }
    }

    public static void markDirty(Image img) {
        SurfaceData.getPrimarySurfaceData(img).markDirty();
    }

    private StateTrackableDelegate theTrackable;

    public SunWritableRaster(SampleModel sampleModel, Point origin) {
        super(sampleModel, origin);
        theTrackable = stealTrackable(dataBuffer);
    }

    public SunWritableRaster(SampleModel sampleModel,
                             DataBuffer dataBuffer,
                             Point origin)
    {
        super(sampleModel, dataBuffer, origin);
        theTrackable = stealTrackable(dataBuffer);
    }

    public SunWritableRaster(SampleModel sampleModel,
                             DataBuffer dataBuffer,
                             Rectangle aRegion,
                             Point sampleModelTranslate,
                             WritableRaster parent)
    {
        super(sampleModel, dataBuffer, aRegion, sampleModelTranslate, parent);
        theTrackable = stealTrackable(dataBuffer);
    }

    
Mark the TrackableDelegate of the associated DataBuffer dirty.
/**
     * Mark the TrackableDelegate of the associated DataBuffer dirty.
     */
    public final void markDirty() {
        theTrackable.markDirty();
    }
}