/* filterRaster.java -- some checks for the filter() methods in the
RescaleOp class.
Copyright (C) 2006 Francis Kung <fkung@redhat.com>
This file is part of Mauve.
Mauve is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
Mauve 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with Mauve; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
*/
// Tags: JDK1.4
package gnu.testlet.java.awt.image.RescaleOp;
import gnu.testlet.TestHarness;
import gnu.testlet.Testlet;
import java.awt.image.BufferedImage;
import java.awt.image.RescaleOp;
import java.awt.image.WritableRaster;
public class filterRaster implements Testlet
{
public void test(TestHarness harness)
{
simpleTests(harness);
testRaster1(harness);
testRaster2(harness);
testMismatch(harness);
}
private void simpleTests(TestHarness harness)
{
harness.checkPoint("filter(Raster)");
// Create an image to work on
BufferedImage img = new BufferedImage(20, 20, BufferedImage.TYPE_USHORT_GRAY);
WritableRaster r = img.getRaster();
r.setSample(1, 1, 0, 150);
RescaleOp op = new RescaleOp(1, 1, null);
// Src and dst rasters can be the same
try
{
op.filter(r, r);
harness.check(true);
}
catch (IllegalArgumentException e)
{
harness.check(false);
}
// Src and dst are different sizes (not allowed, unlike some other Ops)
BufferedImage dst = new BufferedImage(30, 40, BufferedImage.TYPE_INT_RGB);
try
{
op.filter(r, dst.getRaster());
harness.check(false);
}
catch (IllegalArgumentException e)
{
harness.check(true);
}
// Null destination check
WritableRaster dstRast = op.filter(r, null);
harness.check(dstRast.getHeight(), r.getHeight());
harness.check(dstRast.getWidth(), r.getWidth());
harness.check(dstRast.getMinX(), r.getMinX());
harness.check(dstRast.getMinY(), r.getMinY());
harness.check(dstRast.getNumBands(), r.getNumBands());
harness.check(dstRast.getNumDataElements(), r.getNumDataElements());
harness.check(dstRast.getTransferType(), r.getTransferType());
harness.check(dstRast.getBounds(), r.getBounds());
harness.check(dstRast.getDataBuffer().getClass(), r.getDataBuffer().getClass());
// Test positive & negative clipping behaviour
img.getRaster().setSample(1, 1, 0, 1500);
op = new RescaleOp(100, 0, null);
dstRast = op.filter(r, null);
double maxValue = Math.pow(2, r.getSampleModel().getSampleSize(0)) - 1;
harness.check(dstRast.getSample(1, 1, 0), maxValue);
op = new RescaleOp(1, -2000, null);
dstRast = op.filter(r, null);
harness.check(dstRast.getSample(1, 1, 0), 0);
}
public void testRaster1(TestHarness harness)
{
harness.checkPoint("filter(Raster) with one scaling factor");
// Create a raster to work on
BufferedImage img = new BufferedImage(20, 20, BufferedImage.TYPE_INT_ARGB);
WritableRaster r = img.getRaster();
r.setSample(1, 1, 0, 150);
r.setSample(1, 1, 1, 160);
r.setSample(1, 1, 2, 175);
r.setSample(1, 1, 3, 195);
r.setSample(1, 3, 0, 45);
r.setSample(1, 3, 1, 60);
r.setSample(1, 3, 2, 70);
r.setSample(1, 3, 3, 90);
RescaleOp op = new RescaleOp(0.75f, 25f, null);
WritableRaster dest = op.filter(r, null);
harness.check(dest.getSample(1, 1, 0), 137); //rounded down from 137.5
harness.check(dest.getSample(1, 1, 1), 145);
harness.check(dest.getSample(1, 1, 3), 171); //rounded down from 171.25
harness.check(dest.getSample(1, 1, 2), 156); //rounded down from 156.25
harness.check(dest.getSample(1, 3, 0), 58); //rounded down from 58.75
harness.check(dest.getSample(1, 3, 1), 70);
harness.check(dest.getSample(1, 3, 2), 77); //rounded down from 77.5
harness.check(dest.getSample(1, 3, 3), 92); //rounded down from 92.5
}
public void testRaster2(TestHarness harness)
{
harness.checkPoint("filter(Raster) with multiple factors");
// Create an image to work on
BufferedImage img = new BufferedImage(20, 20, BufferedImage.TYPE_INT_ARGB);
WritableRaster r = img.getRaster();
r.setSample(1, 1, 0, 10);
r.setSample(1, 1, 1, 20);
r.setSample(1, 1, 2, 35);
r.setSample(1, 1, 3, 40);
r.setSample(1, 3, 0, 45);
r.setSample(1, 3, 1, 60);
r.setSample(1, 3, 2, 70);
r.setSample(1, 3, 3, 90);
RescaleOp op = new RescaleOp(new float[]{0.75f, 2.5f, -1f, 0f},
new float[]{25f, 2f, 1f, 0f},
null);
WritableRaster dest = op.filter(r, null);
harness.check(dest.getSample(1, 1, 0), 32); //rounded down from 32.5
harness.check(dest.getSample(1, 1, 1), 52);
harness.check(dest.getSample(1, 1, 2), 0);
harness.check(dest.getSample(1, 1, 3), 0);
harness.check(dest.getSample(1, 3, 0), 58); //rounded down from 58.75
harness.check(dest.getSample(1, 3, 1), 152);
harness.check(dest.getSample(1, 3, 2), 0);
harness.check(dest.getSample(1, 3, 3), 0);
}
private void testMismatch(TestHarness harness)
{
harness.checkPoint("filter(Raster) with mismatched arrays");
// Create an image to work on
BufferedImage img = new BufferedImage(20, 20, BufferedImage.TYPE_INT_ARGB);
WritableRaster r = img.getRaster();
r.setSample(1, 1, 0, 10);
r.setSample(1, 1, 1, 20);
r.setSample(1, 1, 2, 35);
r.setSample(1, 1, 3, 40);
r.setSample(1, 3, 0, 45);
r.setSample(1, 3, 1, 60);
r.setSample(1, 3, 2, 70);
r.setSample(1, 3, 3, 90);
// Test mismatched arrays
RescaleOp op = new RescaleOp(new float[]{1, 2, 3, 4}, new float[]{1, 2, 3}, null);
try
{
op.filter(r, null);
harness.check(false);
}
catch (IllegalArgumentException ex)
{
harness.check(true);
}
// Only the first value from both arrays is read if the offsets array
// has only one value
op = new RescaleOp(new float[]{1, 2, 3, 4}, new float[]{1}, null);
try
{
WritableRaster dest = op.filter(r, null);
harness.check(dest.getSample(1, 1, 0), 11);
harness.check(dest.getSample(1, 1, 1), 21);
harness.check(dest.getSample(1, 3, 0), 46);
harness.check(dest.getSample(1, 3, 1), 61);
}
catch (IllegalArgumentException ex)
{
harness.check(false);
}
// Same with a single-length factors array
op = new RescaleOp(new float[]{0.5f}, new float[]{2, 3, 4, 5}, null);
try
{
WritableRaster dest = op.filter(r, null);
harness.check(dest.getSample(1, 1, 0), 7);
harness.check(dest.getSample(1, 1, 1), 12);
harness.check(dest.getSample(1, 3, 0), 24);
harness.check(dest.getSample(1, 3, 1), 32);
}
catch (IllegalArgumentException ex)
{
harness.check(false);
}
}
}