JpegImageMetadata getEXIFThumbnail only works on Jpeg thumbnails stored as Tiff
images.
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Key: SANSELAN-38
URL: https://issues.apache.org/jira/browse/SANSELAN-38
Project: Commons Sanselan
Issue Type: Bug
Environment: Windows Vista, Java 6 SE, incubator 0.97 and 0.98 SNAPSHOT
Reporter: James E-J
JpegImageMetadata jpegMetadata = (JpegImageMetadata) metadata;
BufferedImage image = jpegMetadata.getEXIFThumbnail();
Above code seaches tiff directory structure but only searches for
dir.getTiffImage() and only checks if tiffImageData is null. Jpeg files which
have Jpeg thumbs stored as JpegImageData do not work.
I was able to fix this with following code:
import org.apache.sanselan.formats.tiff.JpegImageData;
import javax.imageio.ImageIO;
import java.io.ByteArrayInputStream;
public BufferedImage getEXIFThumbnail() throws ImageReadException,
IOException {
ArrayList dirs = exif.getDirectories();
for (int i = 0; i < dirs.size(); i++) {
TiffImageMetadata.Directory dir =
(TiffImageMetadata.Directory) dirs
.get(i);
// Debug.debug("dir", dir);
BufferedImage image = dir.getThumbnail();
if (null != image)
return image;
JpegImageData jpegImageData = dir.getJpegImageData();
if(jpegImageData!=null){
ByteArrayInputStream input = new
ByteArrayInputStream(jpegImageData.data);
image = ImageIO.read(input);
if (image!=null)
return image;
}
}
return null;
}
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