Source Code Cross Referenced for ShortGridCoverage.java in  » GIS » deegree » org » deegree » model » coverage » grid » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » deegree » org.deegree.model.coverage.grid 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/trunk/src/org/deegree/model/coverage/grid/ShortGridCoverage.java $
002:        /*----------------    FILE HEADER  ------------------------------------------
003:
004:         This file is part of deegree.
005:         Copyright (C) 2001-2008 by:
006:         EXSE, Department of Geography, University of Bonn
007:         http://www.giub.uni-bonn.de/deegree/
008:         lat/lon GmbH
009:         http://www.lat-lon.de
010:
011:         This library is free software; you can redistribute it and/or
012:         modify it under the terms of the GNU Lesser General Public
013:         License as published by the Free Software Foundation; either
014:         version 2.1 of the License, or (at your option) any later version.
015:
016:         This library is distributed in the hope that it will be useful,
017:         but WITHOUT ANY WARRANTY; without even the implied warranty of
018:         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
019:         Lesser General Public License for more details.
020:
021:         You should have received a copy of the GNU Lesser General Public
022:         License along with this library; if not, write to the Free Software
023:         Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
024:
025:         Contact:
026:
027:         Andreas Poth
028:         lat/lon GmbH
029:         Aennchenstr. 19
030:         53115 Bonn
031:         Germany
032:         E-Mail: poth@lat-lon.de
033:
034:         Klaus Greve
035:         Department of Geography
036:         University of Bonn
037:         Meckenheimer Allee 166
038:         53115 Bonn
039:         Germany
040:         E-Mail: klaus.greve@uni-bonn.de
041:
042:        
043:         ---------------------------------------------------------------------------*/
044:        package org.deegree.model.coverage.grid;
045:
046:        import java.awt.Rectangle;
047:        import java.awt.color.ColorSpace;
048:        import java.awt.image.BandedSampleModel;
049:        import java.awt.image.BufferedImage;
050:        import java.awt.image.ComponentColorModel;
051:        import java.awt.image.DataBuffer;
052:        import java.awt.image.DataBufferShort;
053:        import java.awt.image.Raster;
054:        import java.awt.image.SampleModel;
055:        import java.awt.image.WritableRaster;
056:        import java.awt.image.renderable.RenderableImage;
057:        import java.util.Hashtable;
058:
059:        import org.deegree.model.spatialschema.Envelope;
060:        import org.deegree.model.spatialschema.GeometryFactory;
061:        import org.deegree.ogcwebservices.wcs.describecoverage.CoverageOffering;
062:        import org.deegree.processing.raster.converter.RawData2Image;
063:        import org.opengis.pt.PT_Envelope;
064:
065:        /**
066:         * GridCoverage implementation for holding grids stored in a raw byte matrix (byte[][]) or in a set
067:         * of <tt>ByteGridCoverage</tt>s
068:         * 
069:         * @version $Revision: 9343 $
070:         * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
071:         * @author last edited by: $Author: apoth $
072:         * 
073:         * @version $Revision: 9343 $, $Date: 2007-12-27 05:30:32 -0800 (Thu, 27 Dec 2007) $
074:         */
075:        public class ShortGridCoverage extends AbstractGridCoverage {
076:
077:            private static final long serialVersionUID = -2073045348804541362L;
078:
079:            private short[][][] data = null;
080:
081:            /**
082:             * @param coverageOffering
083:             * @param envelope
084:             * @param data
085:             */
086:            public ShortGridCoverage(CoverageOffering coverageOffering,
087:                    Envelope envelope, short[][][] data) {
088:                this (coverageOffering, envelope, false, data);
089:            }
090:
091:            /**
092:             * @param coverageOffering
093:             * @param envelope
094:             * @param isEditable
095:             * @param data
096:             */
097:            public ShortGridCoverage(CoverageOffering coverageOffering,
098:                    Envelope envelope, boolean isEditable, short[][][] data) {
099:                super (coverageOffering, envelope, isEditable);
100:                this .data = data;
101:            }
102:
103:            /**
104:             * @param coverageOffering
105:             * @param envelope
106:             * @param sources
107:             */
108:            public ShortGridCoverage(CoverageOffering coverageOffering,
109:                    Envelope envelope, ShortGridCoverage[] sources) {
110:                super (coverageOffering, envelope, sources);
111:            }
112:
113:            /**
114:             * The number of sample dimensions in the coverage. For grid coverages, a sample dimension is a
115:             * band.
116:             * 
117:             * @return The number of sample dimensions in the coverage.
118:             * @UML mandatory numSampleDimensions
119:             */
120:            public int getNumSampleDimensions() {
121:                if (data != null) {
122:                    return data.length;
123:                }
124:                return sources[0].getNumSampleDimensions();
125:            }
126:
127:            /**
128:             * Returns 2D view of this coverage as a renderable image. This optional operation allows
129:             * interoperability with <A HREF="http://java.sun.com/products/java-media/2D/">Java2D</A>. If
130:             * this coverage is a {@link "org.opengis.coverage.grid.GridCoverage"} backed by a
131:             * {@link java.awt.image.RenderedImage}, the underlying image can be obtained with:
132:             * 
133:             * <code>getRenderableImage(0,1).{@linkplain RenderableImage#createDefaultRendering()
134:             * createDefaultRendering()}</code>
135:             * 
136:             * @param xAxis
137:             *            Dimension to use for the <var>x</var> axis.
138:             * @param yAxis
139:             *            Dimension to use for the <var>y</var> axis.
140:             * @return A 2D view of this coverage as a renderable image.
141:             * @throws UnsupportedOperationException
142:             *             if this optional operation is not supported.
143:             * @throws IndexOutOfBoundsException
144:             *             if <code>xAxis</code> or <code>yAxis</code> is out of bounds.
145:             */
146:            public RenderableImage getRenderableImage(int xAxis, int yAxis)
147:                    throws UnsupportedOperationException,
148:                    IndexOutOfBoundsException {
149:                if (data != null) {
150:
151:                    return null;
152:                }
153:                // TODO if multi images -> sources.length > 0
154:                return null;
155:            }
156:
157:            /**
158:             * this is a deegree convenience method which returns the source image of an
159:             * <tt>ImageGridCoverage</tt>. In procipal the same can be done with the
160:             * getRenderableImage(int xAxis, int yAxis) method. but creating a <tt>RenderableImage</tt>
161:             * image is very slow. I xAxis or yAxis <= 0 then the size of the returned image will be
162:             * calculated from the source images of the coverage.
163:             * 
164:             * @param xAxis
165:             *            Dimension to use for the <var>x</var> axis.
166:             * @param yAxis
167:             *            Dimension to use for the <var>y</var> axis.
168:             * @return the source image of an <tt>ImageGridCoverage</tt>.
169:             */
170:            public BufferedImage getAsImage(int xAxis, int yAxis) {
171:
172:                if (xAxis <= 0 || yAxis <= 0) {
173:                    // get default size if passed target size is <= 0
174:                    Rectangle rect = calculateOriginalSize();
175:                    xAxis = rect.width;
176:                    yAxis = rect.height;
177:                }
178:                BufferedImage bi = null;
179:                if (data != null) {
180:
181:                    bi = createBufferedImage(data[0][0].length, data[0].length);
182:                    // total number of fields for one band; it is assumed that each
183:                    // band has the same number of fiels
184:                    int numOfFields = data[0].length * data[0][0].length;
185:                    short[][] bb = new short[data.length][];
186:                    for (int z = 0; z < data.length; z++) {
187:                        bb[z] = new short[numOfFields];
188:                    }
189:                    int c = 0;
190:                    for (int i = 0; i < data[0].length; i++) {
191:                        for (int j = 0; j < data[0][i].length; j++) {
192:                            for (int z = 0; z < data.length; z++) {
193:                                bb[z][c] = data[z][i][j];
194:                            }
195:                            c++;
196:                        }
197:                    }
198:                    DataBuffer db = new DataBufferShort(bb, numOfFields);
199:                    SampleModel sm = new BandedSampleModel(
200:                            DataBuffer.TYPE_USHORT, data[0][0].length,
201:                            data[0].length, data.length);
202:                    Raster raster = Raster.createWritableRaster(sm, db, null);
203:                    bi.setData(raster);
204:                } else {
205:                    bi = createBufferedImage(xAxis, yAxis);
206:                    int targetPs = bi.getColorModel().getPixelSize();
207:                    float[][] data = null;
208:                    if (targetPs == 16) {
209:                        // do not use image api if target bitDepth = 16
210:                        data = new float[bi.getHeight()][bi.getWidth()];
211:                    }
212:                    // it's a complex ImageGridCoverage made up of different
213:                    // source coverages
214:                    for (int i = 0; i < sources.length; i++) {
215:                        PT_Envelope env = sources[i].getEnvelope();
216:                        Envelope sourceEnv = GeometryFactory.createEnvelope(
217:                                env.minCP.ord[0], env.minCP.ord[1],
218:                                env.maxCP.ord[0], env.maxCP.ord[1], null);
219:                        env = this .getEnvelope();
220:                        Envelope targetEnv = GeometryFactory.createEnvelope(
221:                                env.minCP.ord[0], env.minCP.ord[1],
222:                                env.maxCP.ord[0], env.maxCP.ord[1], null);
223:
224:                        BufferedImage sourceImg = ((AbstractGridCoverage) sources[i])
225:                                .getAsImage(-1, -1);
226:                        bi = paintImage(bi, data, targetEnv, sourceImg,
227:                                sourceEnv);
228:                    }
229:                    if (targetPs == 16) {
230:                        bi = RawData2Image.rawData2Image(data, false,
231:                                scaleFactor, offset);
232:                    }
233:                }
234:
235:                return bi;
236:            }
237:
238:            /**
239:             * 
240:             * @param xAxis
241:             * @param yAxis
242:             * @return
243:             */
244:            private BufferedImage createBufferedImage(int xAxis, int yAxis) {
245:                BufferedImage bi = null;
246:                int sampleDim = getNumSampleDimensions();
247:                switch (sampleDim) {
248:                case 1: {
249:                    ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
250:                    ComponentColorModel ccm = new ComponentColorModel(cs, null,
251:                            false, false, BufferedImage.OPAQUE,
252:                            DataBuffer.TYPE_USHORT);
253:                    WritableRaster wr = ccm.createCompatibleWritableRaster(
254:                            xAxis, yAxis);
255:
256:                    bi = new BufferedImage(ccm, wr, false, new Hashtable());
257:                }
258:                }
259:                return bi;
260:            }
261:
262:            /**
263:             * calculates the original size of a gridcoverage based on its resolution and the envelope(s) of
264:             * its source(s).
265:             * 
266:             * @return
267:             */
268:            private Rectangle calculateOriginalSize() {
269:
270:                if (data != null) {
271:                    return new Rectangle(data[0][0].length, data[0].length);
272:                }
273:                BufferedImage bi = ((ShortGridCoverage) sources[0]).getAsImage(
274:                        -1, -1);
275:                PT_Envelope env = sources[0].getEnvelope();
276:                double dx = (env.maxCP.ord[0] - env.minCP.ord[0])
277:                        / bi.getWidth();
278:                double dy = (env.maxCP.ord[1] - env.minCP.ord[1])
279:                        / bi.getHeight();
280:
281:                env = this .getEnvelope();
282:                int w = (int) Math.round((env.maxCP.ord[0] - env.minCP.ord[0])
283:                        / dx);
284:                int h = (int) Math.round((env.maxCP.ord[1] - env.minCP.ord[1])
285:                        / dy);
286:                return new Rectangle(w, h);
287:            }
288:        }
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