/*
* Copyright (c) 2001, 2007, 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.
*
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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.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.
*/
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 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 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.
*/
public final void markDirty() {
theTrackable.markDirty();
}
}