gvsig-raster / org.gvsig.raster.mosaic / trunk / org.gvsig.raster.mosaic / org.gvsig.raster.mosaic.io / src / main / java / org / gvsig / raster / mosaic / io / downloader / TileDownloaderForMosaics.java @ 2193
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/* gvSIG. Geographic Information System of the Valencian Government
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*
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* Copyright (C) 2007-2008 Infrastructures and Transports Department
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* of the Valencian Government (CIT)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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package org.gvsig.raster.mosaic.io.downloader; |
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import java.io.IOException; |
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import java.util.ArrayList; |
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import java.util.List; |
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import org.gvsig.fmap.dal.coverage.RasterLocator; |
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import org.gvsig.fmap.dal.coverage.dataset.Buffer; |
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import org.gvsig.fmap.dal.coverage.datastruct.BandList; |
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import org.gvsig.fmap.dal.coverage.datastruct.DatasetBand; |
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import org.gvsig.fmap.dal.coverage.datastruct.Extent; |
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import org.gvsig.fmap.dal.coverage.datastruct.NoData; |
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import org.gvsig.fmap.dal.coverage.exception.BandNotFoundInListException; |
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import org.gvsig.fmap.dal.coverage.exception.NotSupportedExtensionException; |
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import org.gvsig.fmap.dal.coverage.exception.ProcessInterruptedException; |
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import org.gvsig.fmap.dal.coverage.exception.RasterDriverException; |
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import org.gvsig.fmap.dal.coverage.store.props.ColorInterpretation; |
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import org.gvsig.fmap.dal.coverage.util.RasterUtils; |
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import org.gvsig.raster.cache.tile.Tile; |
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import org.gvsig.raster.cache.tile.exception.TileGettingException; |
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import org.gvsig.raster.cache.tile.provider.CacheStruct; |
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import org.gvsig.raster.impl.DefaultRasterManager; |
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import org.gvsig.raster.impl.buffer.DefaultRasterQuery; |
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import org.gvsig.raster.impl.datastruct.BandListImpl; |
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import org.gvsig.raster.impl.datastruct.DatasetBandImpl; |
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import org.gvsig.raster.impl.datastruct.ExtentImpl; |
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import org.gvsig.raster.impl.provider.DefaultRasterProvider; |
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import org.gvsig.raster.impl.provider.RasterProvider; |
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import org.gvsig.raster.impl.provider.tile.BaseTileDownloader; |
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import org.gvsig.raster.mosaic.io.MosaicDataParameters; |
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/**
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* Tile getter
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public class TileDownloaderForMosaics extends BaseTileDownloader { |
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private CacheStruct struct = null; |
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private RasterUtils util = RasterLocator.getManager().getRasterUtils();
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private String extension = null; |
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private List<RasterProvider> provList = null; |
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private int overlapMethod = MosaicDataParameters.FIRST; |
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private int colorCorrectionMethod = MosaicDataParameters.NONE; |
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private TileFusion tileFusion = null; |
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public TileDownloaderForMosaics(DefaultRasterProvider prov,
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List<RasterProvider> provList,
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CacheStruct struct, |
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int tileWidth,
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int tileHeight,
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String extension,
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int overlapMethod,
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int colorCorrectionMethod,
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NoData noData) {
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super(prov, tileWidth, tileHeight);
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this.provList = provList;
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this.struct = struct;
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this.extension = extension;
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this.tileFusion = new TileFusion(overlapMethod, colorCorrectionMethod, noData); |
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} |
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public synchronized Tile downloadTile(Tile tile) throws TileGettingException { |
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try {
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Extent tileExtent = new ExtentImpl(tile.getUl(), tile.getLr());
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double pixelSize = struct.getPixelSizeByLevel(tile.getLevel());
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Buffer bufResult = null; |
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boolean alphaBand = false; |
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List<Buffer> listBuffers = new ArrayList<Buffer>(); |
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ColorInterpretation ci = null;
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//Iterates the list of providers clipping the selected extent
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for (int i = 0; i < provList.size(); i++) { |
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RasterProvider p = provList.get(i); |
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if(!p.getDataParameters().isVisible())
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continue;
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ci = p.getColorInterpretation(); |
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Buffer bufPartialResult = clipTileFromProvider((DefaultRasterProvider)p, tile);
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if(bufPartialResult != null) { |
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if(p.getDataType()[0] == Buffer.TYPE_BYTE && bufPartialResult.getBandCount() > p.getBandCount()) { |
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alphaBand = true; //If one result has alpha band then the alpha band flag is on |
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} |
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listBuffers.add(bufPartialResult); |
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} |
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} |
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if(listBuffers.size() == 0) |
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alphaBand = true;
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//The list of clips is joined in only one tile
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bufResult = tileFusion.joinTiles(listBuffers, tile.getWidthPx(), tile.getHeightPx(), alphaBand ? 3 : -1); |
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if(bufResult == null) |
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bufResult = buildTileBuffer(provList.get(0).getDataType()[0] == Buffer.TYPE_BYTE ? provList.get(0).getBandCount() + 1 : provList.get(0).getBandCount(), |
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tile.getWidthPx(), |
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tile.getHeightPx()); |
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//En el salvado de tiles alphaBand se usa para la interpretaci�n de color y si el tipo no es byte no debe haber banda alpha
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if(provList.get(0).getDataType()[0] != Buffer.TYPE_BYTE) |
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alphaBand = false;
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saveTile(bufResult, pixelSize, extension, |
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alphaBand, tile, tileExtent, ci); |
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//Si borramos el rmf no se puede leer la etiqueta Alpha. En caso de que se modifique jgdal para
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//poder guardar esta etiqueta deberiamos borrar el rmf para ahorrar ficheros
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//File rmf = new File(tile.getFile().getAbsolutePath() + ".rmf");
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//if(rmf.exists())
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//rmf.delete();
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} catch (ProcessInterruptedException e) {
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} catch (RasterDriverException e) {
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throw new TileGettingException(e); |
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} catch (NotSupportedExtensionException e) {
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throw new TileGettingException(e); |
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} catch (IOException e) { |
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throw new TileGettingException(e); |
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} |
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readTileFromDisk(tile); |
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return tile;
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} |
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private Buffer clipTileFromProvider(DefaultRasterProvider p, Tile tile) throws RasterDriverException { |
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Extent tileExtent = new ExtentImpl(tile.getUl(), tile.getLr());
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//Escribe todas las bandas a disco
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BandList newBandList = new BandListImpl(p.getURI(), p.getBandCount(), p.getDataType()[0]); |
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Buffer bufResult = null; |
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double pixelSize = struct.getPixelSizeByLevel(tile.getLevel());
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try {
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Extent ex = util.intersection(p.getExtent(), tileExtent); |
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if(ex == null) |
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return null; |
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int newBufWidth = (int)Math.ceil((ex.width() * this.tilePxWidth) / tileExtent.width()); |
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int newBufHeight = (int)Math.ceil((ex.height() * this.tilePxHeight) / tileExtent.height()); |
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int nBandsBuffer = p.getBandCount();
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//Si no hay parte del tile que cae fuera de la imagen no se usa una nueva banda de transparencia ni valores nodata
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/*if(newBufHeight == this.tilePxHeight && newBufWidth == this.tilePxWidth) {
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bufResult = readSupersampledBuffer(tileExtent, newBandList, this.tilePxWidth, this.tilePxHeight, nBandsBuffer);
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if(bufResult == null) {
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bufResult = buildTileBuffer(nBandsBuffer, this.tilePxWidth, this.tilePxHeight);
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bufResult = p.getWindow(tileExtent, this.tilePxWidth, this.tilePxHeight, newBandList, bufResult, true);
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}
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} else {*/
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//Hay parte del tile que cae fuera de la imagen
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if(p.getDataType()[0] == Buffer.TYPE_BYTE) { |
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//Para imagenes byte se crea una banda de transparencia
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nBandsBuffer ++; |
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} |
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bufResult = buildTileBuffer(nBandsBuffer, this.tilePxWidth, this.tilePxHeight); |
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Buffer smallBuf = readSupersampledBuffer(ex, newBandList, newBufWidth, newBufHeight, nBandsBuffer);
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if(smallBuf == null) { //No ha habido resampleo |
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smallBuf = DefaultRasterManager.getInstance().createMemoryBuffer(p.getDataType()[0], newBufWidth, newBufHeight, nBandsBuffer, true); |
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DefaultRasterQuery q = (DefaultRasterQuery)RasterLocator.getManager().createQuery(); |
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q.setAreaOfInterest(ex, newBufWidth, newBufHeight); |
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q.setBandList(newBandList); |
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q.setBuffer(smallBuf); |
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q.setAdjustToExtent(true);
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smallBuf = p.getDataSet(q); |
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//smallBuf = p.getWindow(ex, newBufWidth, newBufHeight, newBandList, smallBuf, true, null);
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} |
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copyToBuffer(bufResult, tileExtent, smallBuf, ex, pixelSize); |
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//}
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return bufResult;
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} catch (ProcessInterruptedException e) {
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} |
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return null; |
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} |
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/**
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* Builds a Bandlist object to load tiles
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* @return
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* @deprecated It is only for multifile providers
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*/
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@SuppressWarnings("unused") |
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private BandList getBandList() {
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BandListImpl bandList = new BandListImpl();
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for(int i = 0; i < prov.getBandCount(); i++) { |
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try {
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int dataType = prov.getDataType()[i];
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DatasetBand band = new DatasetBandImpl(prov.getURIByBand(i), i, dataType, prov.getBandCount());
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bandList.addBand(band, i); |
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} catch(BandNotFoundInListException ex) {
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//No a�adimos la banda
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} |
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} |
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return bandList;
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} |
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/**
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* If the provider doesn't support resampling then this method reamples the result manually
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* @param tileExtent
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* @param newBandList
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* @param bufWidth
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* @param bufHeight
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* @param nBands
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* @return
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* @throws ProcessInterruptedException
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* @throws RasterDriverException
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*/
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private Buffer readSupersampledBuffer(Extent tileExtent, BandList newBandList, int bufWidth, int bufHeight, int nBands) throws ProcessInterruptedException, RasterDriverException { |
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int widthImgPx = (int)Math.abs(tileExtent.width() / prov.getPixelSizeX()); |
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int heightImgPx = (int)Math.abs(tileExtent.height() / prov.getPixelSizeY()); |
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boolean supersampling = ((bufWidth > widthImgPx) || (bufHeight > heightImgPx)) ? true : false; |
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if(supersampling && !prov.isSupersamplingSupported()) {
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//Ecw no supersamplea por lo que habr� que hacerlo a mano
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Buffer buf = buildTileBuffer(nBands, widthImgPx, heightImgPx);
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DefaultRasterQuery q = (DefaultRasterQuery)RasterLocator.getManager().createQuery(); |
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q.setAreaOfInterest(tileExtent, widthImgPx, heightImgPx); |
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q.setBandList(newBandList); |
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q.setBuffer(buf); |
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q.setAdjustToExtent(true);
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buf = prov.getDataSet(q); |
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//prov.getWindow(tileExtent, widthImgPx, heightImgPx, newBandList, buf, true, null);
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return buf.getAdjustedWindow(bufWidth, bufHeight, Buffer.INTERPOLATION_NearestNeighbour); |
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} |
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return null; |
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} |
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/**
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* Builds a buffer using the specified number of bands and initialize it
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* @param nbands
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* @return
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*/
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private Buffer buildTileBuffer(int nbands, int w, int h) { |
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Buffer bufResult = DefaultRasterManager.getInstance().createMemoryBuffer(prov.getDataType()[0], w, h, nbands, true); |
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if(prov.getDataType()[0] != Buffer.TYPE_BYTE) { |
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for (int i = 0; i < bufResult.getBandCount(); i++) { |
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clearMaskBuffer(bufResult, i); |
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} |
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} else
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clearMaskBuffer(bufResult, nbands - 1);
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return bufResult;
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} |
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/**
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* Copies a piece of image into a tile taking into account the different size and proportion
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* @param bufResult
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* @param tileExtent
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* @param buf
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* @param ex
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* @param pixelSize
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*/
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private void copyToBuffer(Buffer bufResult, Extent tileExtent, |
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Buffer buf, Extent ex, double pixelSize) { |
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double distx = Math.abs(ex.getULX() - tileExtent.getULX()); |
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double disty = Math.abs(ex.getULY() - tileExtent.getULY()); |
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int distpxx = (int)Math.round(distx / pixelSize); |
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int distpxy = (int)Math.round(disty / pixelSize); |
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//Para BYTE la �ltima banda es de transparencia por lo que en esa banda en las zonas donde hay imagen
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//hay que ponerle el valor 255 para que aparezcan visibles
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if(bufResult.getDataType() == Buffer.TYPE_BYTE) { |
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for (int iBand = 0; iBand < bufResult.getBandCount() - 1; iBand++) { |
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if(iBand == 0) { |
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for (int i = distpxy; (i < bufResult.getHeight() && (i - distpxy) < buf.getHeight()); i++) { |
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for (int j = distpxx; (j < bufResult.getWidth() && (j - distpxx) < buf.getWidth()); j++) { |
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bufResult.setElem(i, j, iBand, buf.getElemByte(i - distpxy, j - distpxx, iBand)); |
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bufResult.setElem(i, j, bufResult.getBandCount() - 1, (byte)255); |
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} |
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} |
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} else {
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for (int i = distpxy; (i < bufResult.getHeight() && (i - distpxy) < buf.getHeight()); i++) { |
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for (int j = distpxx; (j < bufResult.getWidth() && (j - distpxx) < buf.getWidth()); j++) { |
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bufResult.setElem(i, j, iBand, buf.getElemByte(i - distpxy, j - distpxx, iBand)); |
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} |
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} |
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} |
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} |
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} |
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//En el resto de casos no se usa banda de transparencia sino que las zonas del tile fuera de la imagen
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//se inicializaron previamente a NoData
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if(bufResult.getDataType() == Buffer.TYPE_SHORT) { |
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for (int iBand = 0; iBand < buf.getBandCount(); iBand++) { |
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for (int i = distpxy; (i < bufResult.getHeight() && (i - distpxy) < buf.getHeight()); i++) { |
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for (int j = distpxx; (j < bufResult.getWidth() && (j - distpxx) < buf.getWidth()); j++) { |
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bufResult.setElem(i, j, iBand, buf.getElemShort(i - distpxy, j - distpxx, iBand)); |
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} |
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} |
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} |
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} |
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if(bufResult.getDataType() == Buffer.TYPE_INT) { |
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for (int iBand = 0; iBand < buf.getBandCount(); iBand++) { |
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for (int i = distpxy; (i < bufResult.getHeight() && (i - distpxy) < buf.getHeight()); i++) { |
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for (int j = distpxx; (j < bufResult.getWidth() && (j - distpxx) < buf.getWidth()); j++) { |
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bufResult.setElem(i, j, iBand, buf.getElemInt(i - distpxy, j - distpxx, iBand)); |
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} |
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} |
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} |
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} |
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if(bufResult.getDataType() == Buffer.TYPE_FLOAT) { |
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for (int iBand = 0; iBand < buf.getBandCount(); iBand++) { |
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for (int i = distpxy; (i < bufResult.getHeight() && (i - distpxy) < buf.getHeight()); i++) { |
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for (int j = distpxx; (j < bufResult.getWidth() && (j - distpxx) < buf.getWidth()); j++) { |
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bufResult.setElem(i, j, iBand, buf.getElemFloat(i - distpxy, j - distpxx, iBand)); |
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} |
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} |
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} |
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} |
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if(bufResult.getDataType() == Buffer.TYPE_DOUBLE) { |
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for (int iBand = 0; iBand < buf.getBandCount(); iBand++) { |
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for (int i = distpxy; (i < bufResult.getHeight() && (i - distpxy) < buf.getHeight()); i++) { |
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for (int j = distpxx; (j < bufResult.getWidth() && (j - distpxx) < buf.getWidth()); j++) { |
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bufResult.setElem(i, j, iBand, buf.getElemDouble(i - distpxy, j - distpxx, iBand)); |
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} |
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} |
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} |
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} |
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} |
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} |