// Tags: JDK1.4
// Copyright (C) 2006 Red Hat
// 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, 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
package gnu.testlet.javax.imageio.plugins.jpeg;
import gnu.testlet.Testlet;
import gnu.testlet.TestHarness;
import java.util.Arrays;
import java.util.Locale;
import javax.imageio.ImageWriteParam;
import javax.imageio.plugins.jpeg.JPEGHuffmanTable;
import javax.imageio.plugins.jpeg.JPEGImageWriteParam;
import javax.imageio.plugins.jpeg.JPEGQTable;
/**
* Test JPEGImageWriteParam.
*/
public class TestJPEGImageWriteParam implements Testlet
{
public void test(TestHarness harness)
{
// use the english locale so that we know what string to expect
// for descriptions
JPEGImageWriteParam param = new JPEGImageWriteParam(Locale.ENGLISH);
// valid data for testing.
JPEGQTable[] qTables = new JPEGQTable[]
{
JPEGQTable.K1Luminance,
JPEGQTable.K1Div2Luminance,
JPEGQTable.K2Chrominance,
JPEGQTable.K2Div2Chrominance
};
JPEGHuffmanTable[] DCHuffmanTables = new JPEGHuffmanTable[]
{
JPEGHuffmanTable.StdDCLuminance,
JPEGHuffmanTable.StdDCChrominance
};
JPEGHuffmanTable[] ACHuffmanTables = new JPEGHuffmanTable[]
{
JPEGHuffmanTable.StdACLuminance,
JPEGHuffmanTable.StdACChrominance
};
// check that tables are not set after construction
harness.check(!param.areTablesSet());
// check that optimize is false after construction
harness.check(!param.getOptimizeHuffmanTables());
// check that returned tables are null
harness.check(param.getQTables() == null);
harness.check(param.getDCHuffmanTables() == null);
harness.check(param.getACHuffmanTables() == null);
// check that tiling is not supported
harness.check(!param.canWriteTiles());
// check that progressive encoding is supported
harness.check(param.canWriteProgressive());
// check the default progressive mode
harness.check(param.getProgressiveMode() == ImageWriteParam.MODE_DISABLED);
// check that compression is supported
harness.check(param.canWriteCompressed());
// check that a single compression type is supported
harness.check(param.getCompressionTypes().length == 1);
// check that the single compression type is called "JPEG"
harness.check(param.getCompressionTypes()[0].equals("JPEG"));
// set explicit compression mode so that compression mode tests
// will work
param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
// check that default compression type is "JPEG"
harness.check(param.getCompressionType().equals("JPEG"));
// check that the default compression quality is 0.75f
harness.check(param.getCompressionQuality() == 0.75f);
// check that compression is not lossless
harness.check(!param.isCompressionLossless());
// check compression descriptions
String[] descriptions = param.getCompressionQualityDescriptions();
harness.check(descriptions.length == 3);
String[] expectedDescriptions =
{
"Minimum useful",
"Visually lossless",
"Maximum useful"
};
harness.check(Arrays.equals(descriptions, expectedDescriptions));
// check compression quality values
float[] values = param.getCompressionQualityValues();
// Sun's API docs say that the length of the quality values array
// will always be one greater than the length of the descriptions
// array but testing shows the the lengths to be equal for
// JPEGImageWriteParam. This implies that rather than specifying
// quality value interval endpoints, the returned array specifies
// actual quality values, each of which correspond directly to a
// quality description.
harness.check(values.length == descriptions.length);
float[] expectedValues = { 0.05f, 0.75f, 0.95f };
harness.check(Arrays.equals(values, expectedValues));
// check setting optimize
param.setOptimizeHuffmanTables(true);
harness.check(param.getOptimizeHuffmanTables());
// check clearing optimize
param.setOptimizeHuffmanTables(false);
harness.check(!param.getOptimizeHuffmanTables());
// check setting compression quality
param.setCompressionQuality(0.31f);
harness.check(param.getCompressionQuality() == 0.31f);
// check that clearing compression quality resets to 0.75f
param.unsetCompression();
harness.check(param.getCompressionQuality() == 0.75f);
// check failure modes for table setting
// null argument
boolean settingFailed = false;
try
{
param.setEncodeTables(qTables, null, ACHuffmanTables);
}
catch (IllegalArgumentException e)
{
settingFailed = true;
}
harness.check(settingFailed);
// invalid length for an array argument
settingFailed = false;
try
{
param.setEncodeTables(new JPEGQTable[]
{
JPEGQTable.K1Luminance,
JPEGQTable.K1Div2Luminance,
JPEGQTable.K2Chrominance,
JPEGQTable.K2Div2Chrominance,
JPEGQTable.K1Luminance
}, DCHuffmanTables, ACHuffmanTables);
}
catch (IllegalArgumentException e)
{
settingFailed = true;
}
harness.check(settingFailed);
// differing lengths for Huffman table array arguments
settingFailed = false;
try
{
param.setEncodeTables(qTables, new JPEGHuffmanTable[]
{
JPEGHuffmanTable.StdDCLuminance
}, ACHuffmanTables);
}
catch (IllegalArgumentException e)
{
settingFailed = true;
}
harness.check(settingFailed);
// check valid setting
settingFailed = false;
try
{
param.setEncodeTables(qTables, DCHuffmanTables, ACHuffmanTables);
}
catch (IllegalArgumentException e)
{
settingFailed = true;
}
harness.check(!settingFailed);
// check tables set
harness.check(param.areTablesSet());
// check getting tables
JPEGQTable[] gotQTables = param.getQTables();
harness.check(gotQTables != null);
harness.check(Arrays.equals(qTables, gotQTables));
JPEGHuffmanTable[] gotDCHuffmanTables = param.getDCHuffmanTables();
harness.check(gotDCHuffmanTables != null);
harness.check(Arrays.equals(DCHuffmanTables, gotDCHuffmanTables));
JPEGHuffmanTable[] gotACHuffmanTables = param.getACHuffmanTables();
harness.check(gotACHuffmanTables != null);
harness.check(Arrays.equals(ACHuffmanTables, gotACHuffmanTables));
// check clearing tables
param.unsetEncodeTables();
// check getting null tables
gotQTables = param.getQTables();
harness.check(gotQTables == null);
gotDCHuffmanTables = param.getDCHuffmanTables();
harness.check(gotDCHuffmanTables == null);
gotACHuffmanTables = param.getACHuffmanTables();
harness.check(gotACHuffmanTables == null);
// check that areTablesSet returns false
harness.check(!param.areTablesSet());
}
}