001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/model/coverage/grid/ImageGridCoverage.java $
002 /*----------------------------------------------------------------------------
003 This file is part of deegree, http://deegree.org/
004 Copyright (C) 2001-2009 by:
005 Department of Geography, University of Bonn
006 and
007 lat/lon GmbH
008
009 This library is free software; you can redistribute it and/or modify it under
010 the terms of the GNU Lesser General Public License as published by the Free
011 Software Foundation; either version 2.1 of the License, or (at your option)
012 any later version.
013 This library is distributed in the hope that it will be useful, but WITHOUT
014 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016 details.
017 You should have received a copy of the GNU Lesser General Public License
018 along with this library; if not, write to the Free Software Foundation, Inc.,
019 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020
021 Contact information:
022
023 lat/lon GmbH
024 Aennchenstr. 19, 53177 Bonn
025 Germany
026 http://lat-lon.de/
027
028 Department of Geography, University of Bonn
029 Prof. Dr. Klaus Greve
030 Postfach 1147, 53001 Bonn
031 Germany
032 http://www.geographie.uni-bonn.de/deegree/
033
034 e-mail: info@deegree.org
035 ----------------------------------------------------------------------------*/
036 package org.deegree.model.coverage.grid;
037
038 import java.awt.Rectangle;
039 import java.awt.image.BufferedImage;
040 import java.awt.image.renderable.ParameterBlock;
041 import java.awt.image.renderable.RenderableImage;
042
043 import javax.media.jai.Interpolation;
044 import javax.media.jai.InterpolationNearest;
045 import javax.media.jai.JAI;
046 import javax.media.jai.RenderableGraphics;
047 import javax.media.jai.RenderedOp;
048
049 import org.deegree.model.crs.CoordinateSystem;
050 import org.deegree.model.spatialschema.Envelope;
051 import org.deegree.ogcwebservices.wcs.describecoverage.CoverageOffering;
052
053 /**
054 * GridCoverage implementation for holding grids stored in an <tt>BufferedImage</tt> or in a set of
055 * <tt>ImageGridCoverage</tt>s
056 *
057 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
058 * @author last edited by: $Author: mschneider $
059 *
060 * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
061 */
062 public class ImageGridCoverage extends AbstractGridCoverage {
063
064 private static final long serialVersionUID = -531939507044569726L;
065
066 private transient BufferedImage image = null;
067
068 /**
069 *
070 * @param coverageOffering
071 * @param envelope
072 * @param image
073 */
074 public ImageGridCoverage( CoverageOffering coverageOffering, Envelope envelope, BufferedImage image ) {
075 this( coverageOffering, envelope, false, image );
076 }
077
078 /**
079 *
080 * @param coverageOffering
081 * @param envelope
082 * @param isEditable
083 * @param image
084 */
085 public ImageGridCoverage( CoverageOffering coverageOffering, Envelope envelope, boolean isEditable,
086 BufferedImage image ) {
087 super( coverageOffering, envelope, isEditable );
088 this.image = image;
089 }
090
091 /**
092 *
093 * @param coverageOffering
094 * @param envelope
095 * @param crs
096 * @param isEditable
097 * @param image
098 */
099 public ImageGridCoverage( CoverageOffering coverageOffering, Envelope envelope, CoordinateSystem crs,
100 boolean isEditable, BufferedImage image ) {
101 super( coverageOffering, envelope, crs, isEditable );
102 this.image = image;
103 }
104
105 /**
106 *
107 * @param coverageOffering
108 * @param envelope
109 * @param sources
110 */
111 public ImageGridCoverage( CoverageOffering coverageOffering, Envelope envelope, ImageGridCoverage[] sources ) {
112 super( coverageOffering, envelope, sources );
113 }
114
115 /**
116 * The number of sample dimensions in the coverage. For grid coverages, a sample dimension is a band.
117 *
118 * @return The number of sample dimensions in the coverage.
119 */
120 public int getNumSampleDimensions() {
121 if ( image != null ) {
122 return image.getData().getNumBands();
123 }
124 return sources[0].getNumSampleDimensions();
125 }
126
127 /**
128 * Returns 2D view of this coverage as a renderable image. This optional operation allows interoperability with <A
129 * HREF="http://java.sun.com/products/java-media/2D/">Java2D</A>. If this coverage is a
130 * {@link "org.opengis.coverage.grid.GridCoverage"} backed by a {@link java.awt.image.RenderedImage}, the underlying
131 * 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 @Override
147 public RenderableImage getRenderableImage( int xAxis, int yAxis )
148 throws UnsupportedOperationException, IndexOutOfBoundsException {
149 if ( image != null ) {
150 if ( xAxis > 0 && yAxis > 0 ) {
151 Rectangle rect = new Rectangle( xAxis, yAxis );
152 RenderableGraphics rg = new RenderableGraphics( rect );
153 rg.drawImage( image, 0, 0, xAxis, yAxis, null );
154 return rg;
155 }
156 Rectangle rect = new Rectangle( image.getWidth(), image.getHeight() );
157 RenderableGraphics rg = new RenderableGraphics( rect );
158 rg.drawImage( image, 0, 0, null );
159 return rg;
160 }
161 // TODO if multi images -> sources.length > 0
162 return null;
163 }
164
165 /**
166 * this is a deegree convenience method which returns the source image of an <tt>ImageGridCoverage</tt>. In procipal
167 * the same can be done with the getRenderableImage(int xAxis, int yAxis) method. but creating a
168 * <tt>RenderableImage</tt> image is very slow. I xAxis or yAxis <= 0 then the size of the returned image will be
169 * calculated from the source images of the coverage.
170 *
171 * @param xAxis
172 * Dimension to use for the <var>x</var> axis.
173 * @param yAxis
174 * Dimension to use for the <var>y</var> axis.
175 * @return the source image of an <tt>ImageGridCoverage</tt>.
176 */
177 @Override
178 public BufferedImage getAsImage( int xAxis, int yAxis ) {
179
180 if ( xAxis <= 0 || yAxis <= 0 ) {
181 // get default size if passed target size is <= 0
182 Rectangle rect = calculateOriginalSize();
183 xAxis = rect.width;
184 yAxis = rect.height;
185 }
186
187 BufferedImage bi = null;
188 if ( image != null ) {
189 if ( xAxis == image.getWidth() && yAxis == image.getHeight() ) {
190 bi = image;
191 } else {
192 // it's a simple ImageGridCoverage just made up of one image
193 ParameterBlock pb = new ParameterBlock();
194 pb.addSource( image );
195 pb.add( xAxis / (float) image.getWidth() ); // The xScale
196 pb.add( yAxis / (float) image.getHeight() ); // The yScale
197 pb.add( 0.0F ); // The x translation
198 pb.add( 0.0F ); // The y translation
199 Interpolation interpolation = new InterpolationNearest();
200 pb.add( interpolation ); // The interpolation
201 // Create the scale operation
202 RenderedOp ro = JAI.create( "scale", pb, null );
203 bi = ro.getAsBufferedImage();
204 }
205 } else {
206 String natFrm = coverageOffering.getSupportedFormats().getNativeFormat().getCode();
207 if ( "jpg".equalsIgnoreCase( natFrm ) || "jpeg".equalsIgnoreCase( natFrm )
208 || "bmp".equalsIgnoreCase( natFrm ) ) {
209 bi = new BufferedImage( xAxis, yAxis, BufferedImage.TYPE_INT_RGB );
210 } else {
211 bi = new BufferedImage( xAxis, yAxis, BufferedImage.TYPE_INT_ARGB );
212 }
213 // it's a complex ImageGridCoverage made up of different
214 // source coverages
215 if ( sources == null || sources.length == 0 ) {
216 return bi;
217 }
218
219 for ( int i = 0; i < sources.length; i++ ) {
220 BufferedImage sourceImg = ( (ImageGridCoverage) sources[i] ).getAsImage( -1, -1 );
221 bi = paintImage( bi, getEnvelope(), sourceImg, sources[i].getEnvelope() );
222 }
223 }
224
225 return bi;
226 }
227
228 /**
229 * calculates the original size of a gridcoverage based on its resolution and the envelope(s) of its source(s).
230 *
231 */
232 private Rectangle calculateOriginalSize() {
233 if ( image != null ) {
234 return new Rectangle( image.getWidth(), image.getHeight() );
235 }
236 BufferedImage bi = ( (ImageGridCoverage) sources[0] ).getAsImage( -1, -1 );
237 Envelope env = sources[0].getEnvelope();
238 double dx = env.getWidth() / bi.getWidth();
239 double dy = env.getHeight() / bi.getHeight();
240 env = this.getEnvelope();
241 int w = (int) Math.round( env.getWidth() / dx );
242 int h = (int) Math.round( env.getHeight() / dy );
243 return new Rectangle( w, h );
244 }
245
246 }