JFIFThumbJPEG(BufferedImage thumb) throws IllegalThumbException {
int INITIAL_BUFSIZE = 4096;
int MAZ_BUFSIZE = 65535 - 2 - PREAMBLE_SIZE;
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream(INITIAL_BUFSIZE);
MemoryCacheImageOutputStream mos = new MemoryCacheImageOutputStream(baos);
JPEGImageWriter thumbWriter = new JPEGImageWriter(null);
thumbWriter.setOutput(mos);
// get default metadata for the thumb
JPEGMetadata metadata =
(JPEGMetadata) thumbWriter.getDefaultImageMetadata(new ImageTypeSpecifier(thumb), null);
// Remove the jfif segment, which should be there.
MarkerSegment jfif = metadata.findMarkerSegment(JFIFMarkerSegment.class, true);
if (jfif == null) {
throw new IllegalThumbException();
}
metadata.markerSequence.remove(jfif);
/* Use this if removing leaves a hole and causes trouble
// Get the tree
String format = metadata.getNativeMetadataFormatName();
IIOMetadataNode tree =
(IIOMetadataNode) metadata.getAsTree(format);
// If there is no app0jfif node, the image is bad
NodeList jfifs = tree.getElementsByTagName("app0JFIF");
if (jfifs.getLength() == 0) {
throw new IllegalThumbException();
}
// remove the app0jfif node
Node jfif = jfifs.item(0);
Node parent = jfif.getParentNode();
parent.removeChild(jfif);
metadata.setFromTree(format, tree);
*/
thumbWriter.write(new IIOImage(thumb, null, metadata));
thumbWriter.dispose();
// Now check that the size is OK
if (baos.size() > MAZ_BUFSIZE) {
throw new IllegalThumbException();
}
data = baos.toByteArray();
} catch (IOException e) {
throw new IllegalThumbException();
}
}
public static JPEGMetadata getMetadata(byte[] src) {
JPEGMetadata metadata = new JPEGMetadata();
Map<String, Integer> foundByteSets = findByteSets(src, BYTE_SETS);
metadata.startOfFrame1 =
fetchByteSetContent(
src, BYTE_SET_MAPPINGS.get(START_OF_FRAME0), foundByteSets.get(START_OF_FRAME0), false);
metadata.endOfImage =
fetchByteSetContent(
src, BYTE_SET_MAPPINGS.get(END_OF_IMAGE), foundByteSets.get(END_OF_IMAGE), false);
return metadata;
}
IIOMetadataNode getNativeNode() {
IIOMetadataNode node = new IIOMetadataNode("JFIFthumbJPEG");
if (thumbMetadata != null) {
node.appendChild(thumbMetadata.getNativeTree());
}
return node;
}
protected Object clone() {
JFIFThumbJPEG newGuy = (JFIFThumbJPEG) super.clone();
if (thumbMetadata != null) {
newGuy.thumbMetadata = (JPEGMetadata) thumbMetadata.clone();
}
return newGuy;
}
int getHeight() {
int retval = 0;
SOFMarkerSegment sof =
(SOFMarkerSegment) thumbMetadata.findMarkerSegment(SOFMarkerSegment.class, true);
if (sof != null) {
retval = sof.numLines;
}
return retval;
}
int getWidth() {
int retval = 0;
SOFMarkerSegment sof =
(SOFMarkerSegment) thumbMetadata.findMarkerSegment(SOFMarkerSegment.class, true);
if (sof != null) {
retval = sof.samplesPerLine;
}
return retval;
}
JFIFThumbJPEG(Node node) throws IIOInvalidTreeException {
if (node.getChildNodes().getLength() > 1) {
throw new IIOInvalidTreeException("JFIFThumbJPEG node must have 0 or 1 child", node);
}
Node child = node.getFirstChild();
if (child != null) {
String name = child.getNodeName();
if (!name.equals("markerSequence")) {
throw new IIOInvalidTreeException(
"JFIFThumbJPEG child must be a markerSequence node", node);
}
thumbMetadata = new JPEGMetadata(false, true);
thumbMetadata.setFromMarkerSequenceNode(child);
}
}
