gvsig-raster / org.gvsig.raster / branches / org.gvsig.raster_dataaccess_refactoring / org.gvsig.raster.lib / org.gvsig.raster.lib.impl / src / main / java / org / gvsig / raster / impl / provider / tile / TileDownloaderForFiles.java @ 2369
History | View | Annotate | Download (7.62 KB)
1 |
/* gvSIG. Geographic Information System of the Valencian Government
|
---|---|
2 |
*
|
3 |
* Copyright (C) 2007-2008 Infrastructures and Transports Department
|
4 |
* of the Valencian Government (CIT)
|
5 |
*
|
6 |
* This program is free software; you can redistribute it and/or
|
7 |
* modify it under the terms of the GNU General Public License
|
8 |
* as published by the Free Software Foundation; either version 2
|
9 |
* of the License, or (at your option) any later version.
|
10 |
*
|
11 |
* This program is distributed in the hope that it will be useful,
|
12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
14 |
* GNU General Public License for more details.
|
15 |
*
|
16 |
* You should have received a copy of the GNU General Public License
|
17 |
* along with this program; if not, write to the Free Software
|
18 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
19 |
* MA 02110-1301, USA.
|
20 |
*
|
21 |
*/
|
22 |
package org.gvsig.raster.impl.provider.tile; |
23 |
|
24 |
import java.io.IOException; |
25 |
|
26 |
import org.gvsig.fmap.dal.coverage.RasterLocator; |
27 |
import org.gvsig.fmap.dal.coverage.dataset.Buffer; |
28 |
import org.gvsig.fmap.dal.coverage.datastruct.Extent; |
29 |
import org.gvsig.fmap.dal.coverage.exception.NotSupportedExtensionException; |
30 |
import org.gvsig.fmap.dal.coverage.exception.ProcessInterruptedException; |
31 |
import org.gvsig.fmap.dal.coverage.exception.QueryException; |
32 |
import org.gvsig.fmap.dal.coverage.exception.RasterDriverException; |
33 |
import org.gvsig.fmap.dal.coverage.store.RasterDataStore; |
34 |
import org.gvsig.fmap.dal.coverage.store.RasterQuery; |
35 |
import org.gvsig.fmap.dal.coverage.store.props.ColorInterpretation; |
36 |
import org.gvsig.raster.cache.tile.Tile; |
37 |
import org.gvsig.raster.cache.tile.exception.TileGettingException; |
38 |
import org.gvsig.raster.cache.tile.provider.CacheStruct; |
39 |
import org.gvsig.raster.impl.DefaultRasterManager; |
40 |
import org.gvsig.raster.impl.datastruct.ExtentImpl; |
41 |
|
42 |
/**
|
43 |
* Tile getter
|
44 |
* @author Nacho Brodin (nachobrodin@gmail.com)
|
45 |
*/
|
46 |
public class TileDownloaderForFiles extends BaseTileDownloader { |
47 |
protected CacheStruct struct = null; |
48 |
protected String extension = null; |
49 |
|
50 |
public TileDownloaderForFiles(RasterDataStore store,
|
51 |
CacheStruct struct, |
52 |
int tileWidth,
|
53 |
int tileHeight,
|
54 |
String extension) {
|
55 |
super(store, tileWidth, tileHeight);
|
56 |
this.struct = struct;
|
57 |
this.extension = extension;
|
58 |
} |
59 |
|
60 |
public synchronized Tile downloadTile(Tile tile) throws TileGettingException { |
61 |
Extent tileExtent = new ExtentImpl(tile.getUl(), tile.getLr());
|
62 |
ColorInterpretation ci = store.getColorInterpretation(); |
63 |
|
64 |
//Escribe todas las bandas a disco
|
65 |
//BandList newBandList = store.getDefaultBandList();//createBandList(prov);
|
66 |
|
67 |
Buffer bufResult = null; |
68 |
|
69 |
double pixelSize = struct.getPixelSizeByLevel(tile.getLevel());
|
70 |
|
71 |
try {
|
72 |
Extent ex = store.getExtent().intersection(tileExtent); |
73 |
|
74 |
//newBuf ser?n distintas de tilePx cuando haya zonas con valores no data. Las de los bordes
|
75 |
int newBufWidth = (int)Math.ceil((ex.width() * this.tilePxWidth) / tileExtent.width()); |
76 |
int newBufHeight = (int)Math.ceil((ex.height() * this.tilePxHeight) / tileExtent.height()); |
77 |
boolean alphaBand = false; |
78 |
int nBandsBuffer = store.getBandCount();
|
79 |
|
80 |
if(store.getColorInterpretation().hasAlphaBand())
|
81 |
alphaBand = true;
|
82 |
|
83 |
//A partir de ahora todos los tiles RGB llevan banda de transparencia, por eso eliminamos este c?digo. Esto es para que
|
84 |
//las capas tileadas puedan aparecer con banda transparente en el cuadro de propiedades. Si no da problemas la
|
85 |
//modificaci?n eliminarlo permanentemente dentro de un par de versiones (19/11/2013 BN2207)
|
86 |
|
87 |
/*if(isInternalTile(newBufWidth, newBufHeight)) {
|
88 |
bufResult = readSupersampledBuffer(tileExtent, this.tilePxWidth, this.tilePxHeight, false);
|
89 |
if(bufResult == null) {
|
90 |
RasterQuery q = RasterLocator.getManager().createQuery();
|
91 |
q.setAreaOfInterest(tileExtent, this.tilePxWidth, this.tilePxHeight);
|
92 |
q.setAllDrawableBands();
|
93 |
q.setAdjustToExtent(true);
|
94 |
bufResult = store.query(q);
|
95 |
}
|
96 |
} else {*/
|
97 |
|
98 |
//Hay parte del tile que cae fuera de la imagen
|
99 |
if(store.getDataType()[0] == Buffer.TYPE_BYTE) { |
100 |
//Para imagenes byte se crea una banda de transparencia
|
101 |
alphaBand = true;
|
102 |
if(!store.getColorInterpretation().hasAlphaBand())
|
103 |
nBandsBuffer ++; |
104 |
} |
105 |
|
106 |
Buffer smallBuf = readSupersampledBuffer(ex, newBufWidth, newBufHeight, alphaBand);
|
107 |
|
108 |
if(smallBuf == null) { //No ha habido resampleo |
109 |
RasterQuery q = RasterLocator.getManager().createQuery(); |
110 |
q.setAreaOfInterest(ex, newBufWidth, newBufHeight); |
111 |
q.setAllDrawableBands(); |
112 |
q.setAdjustToExtent(true);
|
113 |
if(alphaBand)
|
114 |
q.setAlphaBand(store.getBandCount() - 1);
|
115 |
smallBuf = store.query(q); |
116 |
} |
117 |
|
118 |
bufResult = buildTileBuffer(nBandsBuffer, this.tilePxWidth, this.tilePxHeight); |
119 |
RasterLocator.getManager().getRasterUtils().copyToBuffer( |
120 |
bufResult, |
121 |
tileExtent, |
122 |
smallBuf, |
123 |
ex, |
124 |
pixelSize, |
125 |
store.getColorInterpretation().hasAlphaBand()); |
126 |
//}
|
127 |
|
128 |
saveTile(bufResult, pixelSize, extension, alphaBand, tile, tileExtent, ci); |
129 |
//Si borramos el rmf no se puede leer la etiqueta Alpha. En caso de que se modifique jgdal para
|
130 |
//poder guardar esta etiqueta deberiamos borrar el rmf para ahorrar ficheros
|
131 |
//File rmf = new File(tile.getFile().getAbsolutePath() + ".rmf");
|
132 |
//if(rmf.exists())
|
133 |
//rmf.delete();
|
134 |
} catch (ProcessInterruptedException e) {
|
135 |
} catch (RasterDriverException e) {
|
136 |
throw new TileGettingException(e); |
137 |
} catch (NotSupportedExtensionException e) {
|
138 |
throw new TileGettingException(e); |
139 |
} catch (IOException e) { |
140 |
throw new TileGettingException(e); |
141 |
} catch (QueryException e) {
|
142 |
throw new TileGettingException(e); |
143 |
} |
144 |
readTileFromDisk(tile); |
145 |
return tile;
|
146 |
} |
147 |
|
148 |
public boolean isInternalTile(int bufWidth, int bufHeight) { |
149 |
return (bufHeight == this.tilePxHeight && bufWidth == this.tilePxWidth); |
150 |
} |
151 |
|
152 |
/**
|
153 |
* When the buffer of the request is greater than the original raster (> scale 1:1) then the request
|
154 |
* has to be resampled.
|
155 |
* @param tileExtent
|
156 |
* @param newBandList
|
157 |
* @param bufWidth
|
158 |
* @param bufHeight
|
159 |
* @param nBands
|
160 |
* @return
|
161 |
* @throws ProcessInterruptedException
|
162 |
* @throws TileGettingException
|
163 |
*/
|
164 |
protected Buffer readSupersampledBuffer(Extent tileExtent, int bufWidth, int bufHeight, boolean hasAlphaBand) throws ProcessInterruptedException, QueryException, TileGettingException { |
165 |
int widthImgPx = (int)Math.abs(tileExtent.width() / store.getPixelSizeX()); |
166 |
int heightImgPx = (int)Math.abs(tileExtent.height() / store.getPixelSizeY()); |
167 |
|
168 |
if(widthImgPx <= 0) |
169 |
widthImgPx = 1;
|
170 |
if(heightImgPx <= 0) |
171 |
heightImgPx = 1;
|
172 |
|
173 |
boolean supersampling = ((bufWidth > widthImgPx) || (bufHeight > heightImgPx)) ? true : false; |
174 |
|
175 |
if(supersampling) {
|
176 |
RasterQuery q = RasterLocator.getManager().createQuery(); |
177 |
q.setAreaOfInterest(tileExtent, widthImgPx, heightImgPx); |
178 |
q.setAllDrawableBands(); |
179 |
q.setAdjustToExtent(true);
|
180 |
if(hasAlphaBand)
|
181 |
q.setAlphaBand(store.getBandCount() - 1);
|
182 |
Buffer buf = store.query(q);
|
183 |
Buffer result = buf.getAdjustedWindow(bufWidth, bufHeight, Buffer.INTERPOLATION_NearestNeighbour); |
184 |
if(result != buf)
|
185 |
buf.dispose(); |
186 |
return result;
|
187 |
} |
188 |
return null; |
189 |
} |
190 |
|
191 |
/**
|
192 |
* Builds a buffer using the specified number of bands and initialize it
|
193 |
* @param nbands
|
194 |
* @return
|
195 |
*/
|
196 |
protected Buffer buildTileBuffer(int nbands, int w, int h) { |
197 |
Buffer bufResult = DefaultRasterManager.getInstance().createMemoryBuffer(store.getDataType()[0], w, h, nbands, true); |
198 |
if(store.getDataType()[0] != Buffer.TYPE_BYTE) { |
199 |
for (int i = 0; i < bufResult.getBandCount(); i++) { |
200 |
clearMaskBuffer(bufResult, i); |
201 |
} |
202 |
} else
|
203 |
clearMaskBuffer(bufResult, nbands - 1);
|
204 |
return bufResult;
|
205 |
} |
206 |
} |