package org.geotools.arcsde.raster.jai;
import java.awt.Point;
import java.awt.image.ColorModel;
import java.awt.image.DataBuffer;
import java.awt.image.DataBufferByte;
import java.awt.image.DataBufferDouble;
import java.awt.image.DataBufferFloat;
import java.awt.image.DataBufferInt;
import java.awt.image.DataBufferShort;
import java.awt.image.DataBufferUShort;
import java.awt.image.Raster;
import java.awt.image.SampleModel;
import java.io.IOException;
import java.math.BigInteger;
import java.util.Observable;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.media.jai.JAI;
import javax.media.jai.PlanarImage;
import javax.media.jai.TileCache;
import javax.media.jai.TileFactory;
import org.geotools.arcsde.raster.io.TileReader;
import org.geotools.coverage.grid.io.imageio.RecyclingTileFactory;
import org.geotools.util.Utilities;
import org.geotools.util.logging.Logging;
import com.sun.media.jai.util.ImageUtil;
@SuppressWarnings("unchecked")
/**
*
*
* @source $URL$
*/
public class ArcSDEPlanarImage extends PlanarImage {
private static final Logger LOGGER = Logging.getLogger(ArcSDEPlanarImage.class);
private TileReader tileReader;
private final SampleModel tileSampleModel;
private final BigInteger UID;
private final int hashCode;
/**
* We use an internal TileCache for each ArcSDEPlanarImage because RenderedOp's use to call
* getTile(x,y) repeteadly for the same tile and since we're hitting a database it's not easy to
* go fetch a tile from the stream that has already been fetch. Anyway, if a tile is requested
* that's past the current tile index in the stream and it's not on this cache, NativeTileReader
* will perform an extra database query to fetch that single tile, but this is to avoid that
* situation to the maximum extent possible.
*/
private final TileCache tileCache;
public ArcSDEPlanarImage(TileReader tileReader, int minX, int minY, int width, int height,
int tileGridXOffset, int tileGridYOffset, SampleModel tileSampleModel,
ColorModel colorModel) {
this.tileReader = tileReader;
this.tileSampleModel = tileSampleModel;
super.minX = minX;
super.minY = minY;
super.width = width;
super.height = height;
super.tileGridXOffset = tileGridXOffset;
super.tileGridYOffset = tileGridYOffset;
super.tileWidth = tileReader.getTileWidth();
super.tileHeight = tileReader.getTileHeight();
super.colorModel = colorModel;
super.sampleModel = tileSampleModel;
{
int result = 17;
// collect the contributions of various fields
result = Utilities.hash(tileReader.getServerName(), result);
result = Utilities.hash(tileReader.getRasterTableName(), result);
result = Utilities.hash(tileReader.getRasterId(), result);
result = Utilities.hash(tileReader.getPyramidLevel(), result);
this.hashCode = result;
}
this.UID = (BigInteger) ImageUtil.generateID(this);
int bytesPerPixel;
switch (tileSampleModel.getDataType()) {
case DataBuffer.TYPE_BYTE:
bytesPerPixel = 1;
break;
case DataBuffer.TYPE_DOUBLE:
bytesPerPixel = 8;
break;
case DataBuffer.TYPE_FLOAT:
case DataBuffer.TYPE_INT:
bytesPerPixel = 4;
break;
case DataBuffer.TYPE_SHORT:
case DataBuffer.TYPE_USHORT:
bytesPerPixel = 2;
break;
default:
throw new IllegalArgumentException("Unknown DataBuffer type: "
+ tileSampleModel.getDataType());
}
int numTilesInCache = 16;
long memCapacity = numTilesInCache * bytesPerPixel * tileWidth * tileHeight
* tileSampleModel.getNumBands();
this.tileCache = JAI.createTileCache(memCapacity);
final JAI jai = JAI.getDefaultInstance();
TileFactory tileFactory = (TileFactory) jai.getRenderingHint(JAI.KEY_TILE_FACTORY);
if (tileFactory == null) {
if (tileCache instanceof Observable) {
super.tileFactory = new RecyclingTileFactory((Observable) tileCache);
} else {
// not a SunTileCache?
super.tileFactory = new javax.media.jai.RecyclingTileFactory();
}
} else {
super.tileFactory = tileFactory;
}
}
// @Override
// public boolean equals(Object o) {
// return super.equals(o);
// }
@Override
public SampleModel getSampleModel() {
return sampleModel;
}
@Override
public int hashCode() {
return hashCode;
}
@Override
public BigInteger getImageID() {
return UID;
}
/**
* @see java.awt.image.RenderedImage#getTile(int, int)
*/
@Override
public synchronized Raster getTile(final int tileX, final int tileY) {
Raster currentTile = tileCache.getTile(this, tileX, tileY);
if (currentTile != null) {
if (LOGGER.isLoggable(Level.FINER)) {
LOGGER.finer("! GOT TILE FROM TileCache " + tileX + ", " + tileY + ", plevel "
+ tileReader.getPyramidLevel());
}
return currentTile;
}
final int xOrigin = tileXToX(tileX);
final int yOrigin = tileYToY(tileY);
currentTile = tileFactory.createTile(tileSampleModel, new Point(xOrigin, yOrigin));
if (shallIgnoreTile(tileX, tileY)) {
// not a requested tile
return currentTile;
}
final int readerTileX = tileX;// - tileReader.getMinTileX();
final int readerTileY = tileY;// - tileReader.getMinTileY();
try {
switch (tileSampleModel.getDataType()) {
case DataBuffer.TYPE_BYTE: {
DataBufferByte dataBuffer = (DataBufferByte) currentTile.getDataBuffer();
byte[][] bankData = dataBuffer.getBankData();
tileReader.getTile(readerTileX, readerTileY, bankData);
}
break;
case DataBuffer.TYPE_USHORT: {
DataBufferUShort dataBuffer = (DataBufferUShort) currentTile.getDataBuffer();
short[][] bankData = dataBuffer.getBankData();
tileReader.getTile(readerTileX, readerTileY, bankData);
}
break;
case DataBuffer.TYPE_SHORT: {
DataBufferShort dataBuffer = (DataBufferShort) currentTile.getDataBuffer();
short[][] bankData = dataBuffer.getBankData();
tileReader.getTile(readerTileX, readerTileY, bankData);
}
break;
case DataBuffer.TYPE_INT: {
DataBufferInt dataBuffer = (DataBufferInt) currentTile.getDataBuffer();
int[][] bankData = dataBuffer.getBankData();
tileReader.getTile(readerTileX, readerTileY, bankData);
}
break;
case DataBuffer.TYPE_FLOAT: {
DataBufferFloat dataBuffer = (DataBufferFloat) currentTile.getDataBuffer();
float[][] bankData = dataBuffer.getBankData();
tileReader.getTile(readerTileX, readerTileY, bankData);
}
break;
case DataBuffer.TYPE_DOUBLE: {
DataBufferDouble dataBuffer = (DataBufferDouble) currentTile.getDataBuffer();
double[][] bankData = dataBuffer.getBankData();
tileReader.getTile(readerTileX, readerTileY, bankData);
}
break;
default:
throw new IllegalStateException("Unrecognized DataBuffer type: "
+ tileSampleModel.getDataType());
}
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(e);
}
// if (tileX == tileReader.getMinTileX() || tileX == tileReader.getMaxTileX()
// || tileY == tileReader.getMinTileY() || tileY == tileReader.getMaxTileY()) {
tileCache.add(this, tileX, tileY, currentTile);
// }
return currentTile;
}
private boolean shallIgnoreTile(int tx, int ty) {
int minTileX = tileReader.getMinTileX();
int minTileY = tileReader.getMinTileY();
int maxTileX = tileReader.getMaxTileX();
int maxTileY = tileReader.getMaxTileY();
boolean ignore = tx < minTileX || ty < minTileY || tx > maxTileX || ty > maxTileY;
return ignore;
}
@Override
public synchronized void dispose(){
super.dispose();
this.tileReader.dispose();
}
@Override
protected void finalize(){
dispose();
}
}