/* filterImage.java -- some checks for the filter(Image) method of 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: JDK1.2
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;
/**
* Checks the filter(BufferedImage) method in the {@link RescaleOp} class.
*/
public class filterImage implements Testlet
{
/**
* Runs the test using the specified harness.
*
* @param harness the test harness (<code>null</code> not permitted).
*/
public void test(TestHarness harness)
{
simpleTests(harness);
test1(harness);
test2(harness);
test3(harness);
testMismatch(harness);
}
private void simpleTests(TestHarness harness)
{
harness.checkPoint("filter(BufferedImage)");
// 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 images can be the same
try
{
op.filter(img, img);
harness.check(true);
}
catch (IllegalArgumentException e)
{
harness.check(false);
}
// Src and dst use different colorspaces (allowed, will cause implied
// conversion)
BufferedImage dst = new BufferedImage(20, 20, BufferedImage.TYPE_INT_RGB);
try
{
op.filter(img, dst);
harness.check(true);
}
catch (IllegalArgumentException e)
{
harness.check(false);
}
// Src and dst are different sizes (not allowed, unlike some other Ops)
dst = new BufferedImage(30, 40, BufferedImage.TYPE_USHORT_GRAY);
try
{
op.filter(img, dst);
harness.check(false);
}
catch (IllegalArgumentException e)
{
harness.check(true);
}
// Null destination check
dst = op.filter(img, null);
harness.check(dst.getType(),
op.createCompatibleDestImage(img, null).getType());
// Test positive & negative clipping behaviour
img.getRaster().setSample(1, 1, 0, 1500);
op = new RescaleOp(100, 0, null);
dst = op.filter(img, null);
double maxValue = Math.pow(2, img.getColorModel().getComponentSize(0)) - 1;
harness.check(dst.getRaster().getSample(1, 1, 0), maxValue);
op = new RescaleOp(1, -2000, null);
dst = op.filter(img, null);
harness.check(dst.getRaster().getSample(1, 1, 0), 0);
}
private void test1(TestHarness harness)
{
harness.checkPoint("filter(BufferedImage) with one scaling factor");
// 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, 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);
BufferedImage dst = op.filter(img, null);
WritableRaster dest = dst.getRaster();
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, 3, 0), 58); //rounded down from 58.75
harness.check(dest.getSample(1, 3, 1), 70);
/*
// Again, Sun does RGAB whereas we do RGBA =(
// So, for Sun:
harness.check(dest.getSample(1, 1, 2), 175);
harness.check(dest.getSample(1, 1, 3), 171); //rounded down from 171.25
harness.check(dest.getSample(1, 3, 2), 70);
harness.check(dest.getSample(1, 3, 3), 92); //rounded down from 92.5
// For classpath:
harness.check(dest.getSample(1, 1, 2), 156); //rounded down from 156.25
harness.check(dest.getSample(1, 1, 3), 195);
harness.check(dest.getSample(1, 3, 2), 77); //rounded down from 77.5
harness.check(dest.getSample(1, 3, 3), 90);
*/
}
private void test2(TestHarness harness)
{
harness.checkPoint("filter(BufferedImage) with num factors == num " +
"color components");
// 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},
new float[]{25f, 2f, 1.5f},
null);
/* This causes Sun to throw an exception...
*
* java.lang.IllegalArgumentException: Number of channels in the src (4)
* does not match number of channels in the destination (2)
*
* I'm pretty sure it's a bug, but it's not one that's worth mimicing.
* This test will not run on Sun.
*/
try
{
BufferedImage dst = op.filter(img, null);
WritableRaster dest = dst.getRaster();
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, 3, 0), 58); //rounded down from 58.75
harness.check(dest.getSample(1, 3, 1), 152);
/*
// Again, Sun does RGAB whereas we do RGBA =(
// So, for Sun:
harness.check(dest.getSample(1, 1, 2), 35);
harness.check(dest.getSample(1, 1, 3), 41.5);
harness.check(dest.getSample(1, 3, 2), 70);
harness.check(dest.getSample(1, 3, 3), 91.5);
*/
// For classpath:
harness.check(dest.getSample(1, 1, 2), 36); //rounded down from 36.5
harness.check(dest.getSample(1, 1, 3), 40);
harness.check(dest.getSample(1, 3, 2), 71); //rounded down from 71.5
harness.check(dest.getSample(1, 3, 3), 90);
}
catch (IllegalArgumentException ex)
{
harness.debug("Test did not run - this is expected on Sun due to a " +
"bug in their implementation, but this message should not show " +
"when testing Classpath.");
}
}
private void test3(TestHarness harness)
{
harness.checkPoint("filter(BufferedImage) with num factors == num " +
"components");
// 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);
BufferedImage dst = op.filter(img, null);
WritableRaster dest = dst.getRaster();
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(BufferedImage) 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}, null);
try
{
op.filter(img, 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
{
BufferedImage dst = op.filter(img, null);
WritableRaster dest = dst.getRaster();
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
{
BufferedImage dst = op.filter(img, null);
WritableRaster dest = dst.getRaster();
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);
}
}
}