/* filter.java -- some checks for the filter() method of the
BandCombineOp 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.BandCombineOp;
import gnu.testlet.TestHarness;
import gnu.testlet.Testlet;
import java.awt.Point;
import java.awt.image.BandCombineOp;
import java.awt.image.DataBuffer;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import java.util.Arrays;
/**
* Checks the filter method in the {@link BandCombineOp} class.
*/
public class filter implements Testlet
{
/**
* Runs the test using the specified harness.
*
* @param harness the test harness (<code>null</code> not permitted).
*/
public void test(TestHarness harness)
{
harness.checkPoint("filter");
float[][] matrix = new float[][] {{2, 7},
{5, 6}};
WritableRaster src = Raster.createBandedRaster(DataBuffer.TYPE_INT, 5, 5, 2, new Point(0,0));
/* Setting up:
[0] [1] [2] [3] [4]
[0] . . x . .
[1] . . . . .
[2] . . . . .
[3] . . . . .
[4] . . . . x
with two bands
*/
src.setSample(2, 1, 0, 150);
src.setSample(4, 4, 0, 85);
src.setSample(2, 1, 1, 25);
src.setSample(4, 4, 1, 110);
// Basic checks on output
BandCombineOp op = new BandCombineOp(matrix, null);
WritableRaster dst2 = op.createCompatibleDestRaster(src);
WritableRaster dst = op.filter(src, dst2);
harness.check(dst, dst2);
harness.check(dst.getNumBands(), 2);
// A null dst2 should also work
dst2 = null;
dst = op.filter(src, dst2);
harness.check(dst instanceof WritableRaster);
harness.check(dst2, null);
// Check first band
int[] pixels = dst.getSamples(0, 0, 5, 5, 0, (int[])null);
int[] expected = new int[25];
Arrays.fill(expected, 0);
expected[7] = 475;
expected[24] = 940;
harness.check(Arrays.equals(expected, pixels));
// Check second band
pixels = dst.getSamples(0, 0, 5, 5, 1, pixels);
expected[7] = 900;
expected[24] = 1085;
harness.check(Arrays.equals(expected, pixels));
// Check the implied 1 at the end of the band samples, which happens if
// there is one more column in the matrix than there are bands
// And throw in a check with negative numbers too... why not =)
matrix = new float[][] {{2, -7, 5},
{5, 6, -3}};
op = new BandCombineOp(matrix, null);
dst = op.filter(src, dst);
// First band
pixels = dst.getSamples(0, 0, 5, 5, 0, (int[])null);
Arrays.fill(expected, 5);
expected[7] = 130;
expected[24] = -595;
harness.check(Arrays.equals(expected, pixels));
// Second band
pixels = dst.getSamples(0, 0, 5, 5, 1, (int[])null);
Arrays.fill(expected, -3);
expected[7] = 897;
expected[24] = 1082;
harness.check(Arrays.equals(expected, pixels));
// Check for overflow (this should fail silently and not throw an exception)
matrix = new float[][] {{2000000000, 2000000000},
{2000000000, 2000000000}};
try
{
op = new BandCombineOp(matrix, null);
dst = op.filter(src, dst);
harness.check(true);
}
catch (Exception e)
{
harness.check(false);
}
// Check for exceptions
try
{
expected[25] = 100;
harness.check(false);
}
catch (ArrayIndexOutOfBoundsException e)
{
harness.check(true);
}
// accessing invalid band number
try
{
pixels = dst.getSamples(0, 0, 5, 5, 2, pixels);
harness.check(false);
}
catch (ArrayIndexOutOfBoundsException e)
{
harness.check(true);
}
// dst has wrong number of bands
dst = Raster.createBandedRaster(DataBuffer.TYPE_INT, 5, 5, 6, new Point(0,0));
try
{
dst = op.filter(src, dst);
harness.check(false);
}
catch (IllegalArgumentException e)
{
harness.check(true);
}
// dst has wrong data type
dst = Raster.createBandedRaster(DataBuffer.TYPE_BYTE, 5, 5, 1, new Point(0,0));
try
{
dst = op.filter(src, dst);
harness.check(false);
}
catch (IllegalArgumentException e)
{
harness.check(true);
}
}
}