/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2005-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.coverage.processing;
import java.awt.image.Raster;
import java.awt.image.RenderedImage;
import javax.media.jai.OperationNode;
import org.opengis.coverage.grid.GridCoverage;
import org.geotools.coverage.grid.GridCoverage2D;
import static org.geotools.coverage.grid.ViewType.*;
import org.geotools.test.TestData;
import org.junit.*;
import static org.junit.Assert.*;
/**
* Tests JAI operation wrapped as {@link OperatorJAI}.
* <p>
* <strong>NOTE:</strong>
* This test may fails when executed on a machine without the <cite>mediaLib</cite> accelerator.
* On Windows, the {@code mlib_jai.dll} and {@code mlib_jai_mmx.dll} files should exist in the
* {@code jre/bin} directory, as well as {@code mlibwrapper_jai.jar} in {@code jre/lib/ext}.
* Those {@code .dll} files should be there if JAI has been installed with the Sun standard
* installation program ({@code jai-1_1_2_01-lib-windows-i586-jdk.exe}). With such installation,
* everything should run fine. The {@code .dll} files are probably missing if JAI has been put in
* the classpath by Maven, like our past attempt on the 2.1 branch.
* <p>
* This behavior looks like a JAI bug to me. In theory, the pure Java mode is supposed to produce
* exactly the same result than the <cite>mediaLib</cite> native mode; just slower. This test
* failure suggests that it is not always the case. The <cite>mediaLib</cite> native code seems
* right in this case (the bug would be in the pure Java code).
*
*
* @source $URL$
* @version $Id$
* @author Martin Desruisseaux (IRD)
*/
public final class OperationsTest extends GridProcessingTestBase {
/**
* Sample image.
*/
private GridCoverage2D SST;
/**
* The grid coverage processor.
*/
private Operations processor;
/**
* Fetch the processor before each test.
*/
@Before
public void setUp() {
processor = Operations.DEFAULT;
SST = EXAMPLES.get(0);
}
/**
* Tests {@link Operations#subtract}.
*
* @todo Investigate why the color palette is lost.
*/
@Test
public void testSubtract() {
double[] constants = new double[] {18.75};
GridCoverage sourceCoverage = SST.view(GEOPHYSICS);
GridCoverage targetCoverage = (GridCoverage) processor.subtract(sourceCoverage, constants);
RenderedImage sourceImage = sourceCoverage.getRenderableImage(0,1).createDefaultRendering();
RenderedImage targetImage = targetCoverage.getRenderableImage(0,1).createDefaultRendering();
Raster sourceRaster = sourceImage.getData();
Raster targetRaster = targetImage.getData();
assertNotSame(sourceCoverage, targetCoverage);
assertNotSame(sourceImage, targetImage);
assertNotSame(sourceRaster, targetRaster);
assertSame (sourceCoverage.getCoordinateReferenceSystem(), targetCoverage.getCoordinateReferenceSystem());
assertEquals (sourceCoverage.getEnvelope(), targetCoverage.getEnvelope());
assertEquals (sourceCoverage.getGridGeometry(), targetCoverage.getGridGeometry());
assertEquals (sourceRaster .getMinX(), targetRaster .getMinX());
assertEquals (sourceRaster .getMinY(), targetRaster .getMinY());
assertEquals (sourceRaster .getWidth(), targetRaster .getWidth());
assertEquals (sourceRaster .getHeight(), targetRaster .getHeight());
assertEquals (0, sourceRaster.getMinX());
assertEquals (0, sourceRaster.getMinY());
assertEquals ("SubtractConst", ((OperationNode) targetImage).getOperationName());
final boolean medialib = TestData.isMediaLibAvailable();
for (int y=sourceRaster.getHeight(); --y>=0;) {
for (int x=sourceRaster.getWidth(); --x>=0;) {
final float s = sourceRaster.getSampleFloat(x, y, 0);
final float t = targetRaster.getSampleFloat(x, y, 0);
if (Float.isNaN(s)) {
/*
* For a mysterious reason (JAI bug?), the following test seems to fail when
* JAI is running in pure Java mode. If you get an assertion failure on this
* line, then make sure that "<your_jdk_path>/jre/bin/mlib_jai.dll" (Windows)
* or "lib/i386/libmlib_jai.so" (Linux) is presents in your JDK installation.
*/
if (medialib) {
assertTrue(Float.isNaN(t));
}
} else {
assertEquals(s - constants[0], t, 1E-3f);
}
}
}
if (SHOW) {
show(targetCoverage);
}
}
/**
* Tests {@link Operations#gradientMagnitude}.
*
* @todo Investigate why the geophysics view is much more visible than the non-geophysics one.
*/
@Test
public void testGradientMagnitude() {
GridCoverage sourceCoverage = SST.view(GEOPHYSICS);
GridCoverage targetCoverage = (GridCoverage) processor.gradientMagnitude(sourceCoverage);
RenderedImage sourceImage = sourceCoverage.getRenderableImage(0,1).createDefaultRendering();
RenderedImage targetImage = targetCoverage.getRenderableImage(0,1).createDefaultRendering();
Raster sourceRaster = sourceImage.getData();
Raster targetRaster = targetImage.getData();
assertNotSame(sourceCoverage, targetCoverage);
assertNotSame(sourceImage, targetImage);
assertNotSame(sourceRaster, targetRaster);
assertSame (sourceCoverage.getCoordinateReferenceSystem(), targetCoverage.getCoordinateReferenceSystem());
assertEquals (sourceCoverage.getEnvelope(), targetCoverage.getEnvelope());
assertEquals (sourceCoverage.getGridGeometry(), targetCoverage.getGridGeometry());
assertEquals (sourceRaster .getMinX(), targetRaster .getMinX());
assertEquals (sourceRaster .getMinY(), targetRaster .getMinY());
assertEquals (sourceRaster .getWidth(), targetRaster .getWidth());
assertEquals (sourceRaster .getHeight(), targetRaster .getHeight());
assertEquals (0, sourceRaster.getMinX());
assertEquals (0, sourceRaster.getMinY());
assertEquals ("GradientMagnitude", ((OperationNode) targetImage).getOperationName());
assertEquals(3.95f, targetRaster.getSampleFloat(304, 310, 0), 1E-2f);
assertEquals(1.88f, targetRaster.getSampleFloat(262, 357, 0), 1E-2f);
if (SHOW) {
show(targetCoverage);
}
}
}