001/*
002 * $RCSfile: J2KRenderedImage.java,v $
003 *
004 * 
005 * Copyright (c) 2005 Sun Microsystems, Inc. All  Rights Reserved.
006 * 
007 * Redistribution and use in source and binary forms, with or without
008 * modification, are permitted provided that the following conditions
009 * are met: 
010 * 
011 * - Redistribution of source code must retain the above copyright 
012 *   notice, this  list of conditions and the following disclaimer.
013 * 
014 * - Redistribution in binary form must reproduce the above copyright
015 *   notice, this list of conditions and the following disclaimer in 
016 *   the documentation and/or other materials provided with the
017 *   distribution.
018 * 
019 * Neither the name of Sun Microsystems, Inc. or the names of 
020 * contributors may be used to endorse or promote products derived 
021 * from this software without specific prior written permission.
022 * 
023 * This software is provided "AS IS," without a warranty of any 
024 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND 
025 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, 
026 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
027 * EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL 
028 * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF 
029 * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
030 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR 
031 * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
032 * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
033 * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
034 * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
035 * POSSIBILITY OF SUCH DAMAGES. 
036 * 
037 * You acknowledge that this software is not designed or intended for 
038 * use in the design, construction, operation or maintenance of any 
039 * nuclear facility. 
040 *
041 * $Revision: 1.2 $
042 * $Date: 2006/09/28 00:57:57 $
043 * $State: Exp $
044 */
045package com.github.jaiimageio.jpeg2000.impl;
046
047import java.awt.Point;
048import java.awt.Rectangle;
049import java.awt.image.Raster;
050import java.awt.image.WritableRaster;
051import java.io.IOException;
052
053import javax.imageio.stream.ImageInputStream;
054
055import jj2000.j2k.codestream.reader.HeaderDecoder;
056
057import com.github.jaiimageio.impl.common.SimpleRenderedImage;
058
059public class J2KRenderedImage extends SimpleRenderedImage {
060    private Raster currentTile;
061    private Point currentTileGrid;
062
063    private J2KReadState readState;
064
065    public J2KRenderedImage(ImageInputStream iis,
066                            J2KImageReadParamJava param,
067                            J2KMetadata metadata,
068                            J2KImageReader reader) throws IOException {
069        this(new J2KReadState(iis, param, metadata, reader));
070    }
071
072    public J2KRenderedImage(ImageInputStream iis,
073                            J2KImageReadParamJava param,
074                            J2KImageReader reader) throws IOException {
075        this(new J2KReadState(iis, param, reader));
076    }
077
078    public J2KRenderedImage(J2KReadState readState) {
079        this.readState = readState;
080
081        HeaderDecoder hd = readState.getHeader();
082
083        //determnined by destination
084        Rectangle destinationRegion = readState.getDestinationRegion();
085        width = destinationRegion.width;
086        height = destinationRegion.height;
087        minX = destinationRegion.x;
088        minY = destinationRegion.y;
089
090        Rectangle tile0Rect = readState.getTile0Rect();
091        tileWidth = tile0Rect.width;
092        tileHeight = tile0Rect.height;
093        tileGridXOffset = tile0Rect.x;
094        tileGridYOffset = tile0Rect.y;
095
096        sampleModel = readState.getSampleModel();
097        colorModel = readState.getColorModel();
098    }
099
100    public synchronized Raster getTile(int tileX, int tileY) {
101        if (currentTile != null &&
102            currentTileGrid.x == tileX &&
103            currentTileGrid.y == tileY)
104            return currentTile;
105
106        if (tileX >= getNumXTiles() || tileY >= getNumYTiles())
107            throw new IllegalArgumentException(I18N.getString("J2KReadState1"));
108
109        try {
110            int x = tileXToX(tileX);
111            int y = tileYToY(tileY);
112            currentTile =
113                Raster.createWritableRaster(sampleModel,
114                                            new Point(x, y));
115            currentTile = readState.getTile(tileX,
116                                            tileY,
117                                            (WritableRaster)currentTile);
118        } catch (IOException e) {
119            throw new RuntimeException(e);
120        }
121
122        if (currentTileGrid == null)
123            currentTileGrid = new Point(tileX, tileY);
124        else {
125            currentTileGrid.x = tileX;
126            currentTileGrid.y = tileY;
127        }
128
129        return currentTile;
130    }
131}