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/*
* Copyright 2002-2017 Drew Noakes
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* More information about this project is available at:
*
* https://drewnoakes.com/code/exif/
* https://github.com/drewnoakes/metadata-extractor
*/
package com.drew.imaging.png;
import com.drew.lang.KeyValuePair;
import com.drew.lang.annotations.NotNull;
import com.drew.metadata.Metadata;
import com.drew.metadata.png.PngDirectory;
import org.junit.Test;
import java.io.FileInputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.List;
import java.util.Locale;
import java.util.TimeZone;
import static org.junit.Assert.*;
/**
* @author Drew Noakes https://drewnoakes.com
*/
public class PngMetadataReaderTest
{
@NotNull
private static Metadata processFile(@NotNull String filePath) throws PngProcessingException, IOException
{
FileInputStream inputStream = null;
try {
inputStream = new FileInputStream(filePath);
return PngMetadataReader.readMetadata(inputStream);
} finally {
if (inputStream != null) {
inputStream.close();
}
}
}
@Test
public void testGimpGreyscaleWithManyChunks() throws Exception
{
TimeZone timeZone = TimeZone.getDefault();
try {
TimeZone.setDefault(TimeZone.getTimeZone("GMT"));
Metadata metadata = processFile("Tests/Data/gimp-8x12-greyscale-alpha-time-background.png");
Collection<PngDirectory> directories = metadata.getDirectoriesOfType(PngDirectory.class);
assertNotNull(directories);
assertEquals(6, directories.size());
PngDirectory[] dirs = new PngDirectory[directories.size()];
directories.toArray(dirs);
assertEquals(PngChunkType.IHDR, dirs[0].getPngChunkType());
assertEquals(8, dirs[0].getInt(PngDirectory.TAG_IMAGE_WIDTH));
assertEquals(12, dirs[0].getInt(PngDirectory.TAG_IMAGE_HEIGHT));
assertEquals(8, dirs[0].getInt(PngDirectory.TAG_BITS_PER_SAMPLE));
assertEquals(4, dirs[0].getInt(PngDirectory.TAG_COLOR_TYPE));
assertEquals(0, dirs[0].getInt(PngDirectory.TAG_COMPRESSION_TYPE));
assertEquals(0, dirs[0].getInt(PngDirectory.TAG_FILTER_METHOD));
assertEquals(0, dirs[0].getInt(PngDirectory.TAG_INTERLACE_METHOD));
assertEquals(PngChunkType.gAMA, dirs[1].getPngChunkType());
assertEquals(0.45455, dirs[1].getDouble(PngDirectory.TAG_GAMMA), 0.00001);
assertEquals(PngChunkType.bKGD, dirs[2].getPngChunkType());
assertArrayEquals(new byte[]{0, 52}, dirs[2].getByteArray(PngDirectory.TAG_BACKGROUND_COLOR));
//noinspection ConstantConditions
assertEquals(PngChunkType.pHYs, dirs[3].getPngChunkType());
assertEquals(1, dirs[3].getInt(PngDirectory.TAG_UNIT_SPECIFIER));
assertEquals(2835, dirs[3].getInt(PngDirectory.TAG_PIXELS_PER_UNIT_X));
assertEquals(2835, dirs[3].getInt(PngDirectory.TAG_PIXELS_PER_UNIT_Y));
assertEquals(PngChunkType.tIME, dirs[4].getPngChunkType());
assertEquals("2013:01:01 04:08:30", dirs[4].getString(PngDirectory.TAG_LAST_MODIFICATION_TIME));
java.util.Date modTime = dirs[4].getDate(PngDirectory.TAG_LAST_MODIFICATION_TIME);
SimpleDateFormat formatter = new SimpleDateFormat("EE MMM DD HH:mm:ss z yyyy", Locale.US);
formatter.setTimeZone(TimeZone.getTimeZone("GMT"));
assertEquals("Tue Jan 01 04:08:30 GMT 2013", formatter.format(modTime));
assertNotNull(modTime);
assertEquals(1357013310000L, modTime.getTime());
assertEquals(PngChunkType.iTXt, dirs[5].getPngChunkType());
@SuppressWarnings("unchecked")
List<KeyValuePair> pairs = (List<KeyValuePair>)dirs[5].getObject(PngDirectory.TAG_TEXTUAL_DATA);
assertNotNull(pairs);
assertEquals(1, pairs.size());
assertEquals("Comment", pairs.get(0).getKey().toString());
assertEquals("Created with GIMP", pairs.get(0).getValue().toString());
} finally {
TimeZone.setDefault(timeZone);
}
}
}
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