com.drew.metadata.png.PngDirectory Java Examples

The following examples show how to use com.drew.metadata.png.PngDirectory. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example #1

Source File: ImageRecordReader.java From Bats with Apache License 2.0

4 votes

private void processDirectory(final MapWriter writer, final Directory directory, final Metadata metadata) {
  for (Tag tag : directory.getTags()) {
    try {
      final int tagType = tag.getTagType();
      Object value;
      if (descriptive || isDescriptionTag(directory, tagType)) {
        value = directory.getDescription(tagType);
        if (directory instanceof PngDirectory) {
          if (((PngDirectory) directory).getPngChunkType().areMultipleAllowed()) {
            value = new String[] { (String) value };
          }
        }
      } else {
        value = directory.getObject(tagType);
        if (directory instanceof ExifIFD0Directory && tagType == ExifIFD0Directory.TAG_DATETIME) {
          ExifSubIFDDirectory exifSubIFDDir = metadata.getFirstDirectoryOfType(ExifSubIFDDirectory.class);
          String subsecond = null;
          if (exifSubIFDDir != null) {
            subsecond = exifSubIFDDir.getString(ExifSubIFDDirectory.TAG_SUBSECOND_TIME);
          }
          value = directory.getDate(tagType, subsecond, timeZone);
        } else if (directory instanceof ExifSubIFDDirectory) {
          if (tagType == ExifSubIFDDirectory.TAG_DATETIME_ORIGINAL) {
            value = ((ExifSubIFDDirectory) directory).getDateOriginal(timeZone);
          } else if (tagType == ExifSubIFDDirectory.TAG_DATETIME_DIGITIZED) {
            value = ((ExifSubIFDDirectory) directory).getDateDigitized(timeZone);
          }
        } else if (directory instanceof GpsDirectory) {
          if (tagType == GpsDirectory.TAG_LATITUDE) {
            value = ((GpsDirectory) directory).getGeoLocation().getLatitude();
          } else if (tagType == GpsDirectory.TAG_LONGITUDE) {
            value = ((GpsDirectory) directory).getGeoLocation().getLongitude();
          }
        }
        if (isVersionTag(directory, tagType)) {
          value = directory.getString(tagType, "US-ASCII");
        } else if (isDateTag(directory, tagType)) {
          value = directory.getDate(tagType, timeZone);
        }
      }
      writeValue(writer, formatName(tag.getTagName()), value);
    } catch (Exception e) {
      // simply skip this tag
    }
  }
}

Example #2

Source File: ImageRecordReader.java From Bats with Apache License 2.0

4 votes

private boolean isDateTag(final Directory directory, final int tagType) {
  return directory instanceof IccDirectory && tagType == IccDirectory.TAG_PROFILE_DATETIME ||
      directory instanceof PngDirectory && tagType == PngDirectory.TAG_LAST_MODIFICATION_TIME;
}

Example #3

Source File: PngMetadataReaderTest.java From metadata-extractor with Apache License 2.0

4 votes

@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);
    }
}