/**
* Updates the metadata information based on the parameters to this writer.
*
* @param meta the metadata
* @param params the parameters
* @return the updated metadata
*/
protected IIOMetadata updateMetadata(IIOMetadata meta, ImageWriterParams params) {
final String stdmeta = "javax_imageio_1.0";
if (meta.isStandardMetadataFormatSupported()) {
IIOMetadataNode root = (IIOMetadataNode) meta.getAsTree(stdmeta);
IIOMetadataNode dim = getChildNode(root, "Dimension");
IIOMetadataNode child;
if (params.getResolution() != null) {
child = getChildNode(dim, "HorizontalPixelSize");
if (child == null) {
child = new IIOMetadataNode("HorizontalPixelSize");
dim.appendChild(child);
}
child.setAttribute("value", Double.toString(params.getResolution().doubleValue() / 25.4));
child = getChildNode(dim, "VerticalPixelSize");
if (child == null) {
child = new IIOMetadataNode("VerticalPixelSize");
dim.appendChild(child);
}
child.setAttribute("value", Double.toString(params.getResolution().doubleValue() / 25.4));
}
try {
meta.mergeTree(stdmeta, root);
} catch (IIOInvalidTreeException e) {
throw new RuntimeException("Cannot update image metadata: " + e.getMessage());
}
}
return meta;
}
/**
* Reads image meta data.
*
* @param oimage
* @return
*/
public static Map<String, String> readImageData(IIOImage oimage) {
Map<String, String> dict = new HashMap<String, String>();
IIOMetadata imageMetadata = oimage.getMetadata();
if (imageMetadata != null) {
IIOMetadataNode dimNode = (IIOMetadataNode) imageMetadata.getAsTree("javax_imageio_1.0");
NodeList nodes = dimNode.getElementsByTagName("HorizontalPixelSize");
int dpiX;
if (nodes.getLength() > 0) {
float dpcWidth = Float.parseFloat(nodes.item(0).getAttributes().item(0).getNodeValue());
dpiX = (int) Math.round(25.4f / dpcWidth);
} else {
dpiX = Toolkit.getDefaultToolkit().getScreenResolution();
}
dict.put("dpiX", String.valueOf(dpiX));
nodes = dimNode.getElementsByTagName("VerticalPixelSize");
int dpiY;
if (nodes.getLength() > 0) {
float dpcHeight = Float.parseFloat(nodes.item(0).getAttributes().item(0).getNodeValue());
dpiY = (int) Math.round(25.4f / dpcHeight);
} else {
dpiY = Toolkit.getDefaultToolkit().getScreenResolution();
}
dict.put("dpiY", String.valueOf(dpiY));
}
return dict;
}
void readAndDisplayMetadata(String fileName) {
try {
File file = new File(fileName);
ImageInputStream iis = ImageIO.createImageInputStream(file);
Iterator<ImageReader> readers = ImageIO.getImageReaders(iis);
if (readers.hasNext()) {
// pick the first available ImageReader
ImageReader reader = readers.next();
// attach source to the reader
reader.setInput(iis, true);
// read metadata of first image
IIOMetadata metadata = reader.getImageMetadata(0);
String[] names = metadata.getMetadataFormatNames();
int length = names.length;
for (int i = 0; i < length; i++) {
System.out.println("Format name: " + names[i]);
displayMetadata(metadata.getAsTree(names[i]));
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Merges <code>inData</code> into <code>outData</code>. The supplied metadata format name is
* attempted first and failing that the standard metadata format name is attempted.
*/
private void convertMetadata(String metadataFormatName, IIOMetadata inData, IIOMetadata outData) {
String formatName = null;
String nativeFormatName = inData.getNativeMetadataFormatName();
if (nativeFormatName != null && nativeFormatName.equals(metadataFormatName)) {
formatName = metadataFormatName;
} else {
String[] extraFormatNames = inData.getExtraMetadataFormatNames();
if (extraFormatNames != null) {
for (int i = 0; i < extraFormatNames.length; i++) {
if (extraFormatNames[i].equals(metadataFormatName)) {
formatName = metadataFormatName;
break;
}
}
}
}
if (formatName == null && inData.isStandardMetadataFormatSupported()) {
formatName = STANDARD_METADATA_NAME;
}
if (formatName != null) {
try {
Node root = inData.getAsTree(formatName);
outData.mergeTree(formatName, root);
} catch (IIOInvalidTreeException e) {
// ignore
}
}
}
@Test
public void metaDataTest() throws IOException {
Iterator<ImageReader> itrR = ImageIO.getImageReadersByFormatName("jpg");
ImageReader imageReader = itrR.next();
ImageInputStream imageInputStream = ImageIO.createImageInputStream(new File(SRCIMG));
imageReader.setInput(imageInputStream, true);
IIOMetadata ioMetadata = imageReader.getImageMetadata(0);
System.out.println(ioMetadata.toString());
}
/**
* Initialize a Map of attributes available from the underlying ImageMetadata.
*
* @param reader
*/
private void buildAttributesMap(SpatioTemporalImageReader reader) {
attributesMap = new HashMap<String, String>();
IIOMetadata metadata;
final int imageIndex = getImageIndex();
try {
metadata = reader.getImageMetadata(imageIndex);
if (metadata instanceof GRIB1ImageMetadata) {
Node root = metadata.getAsTree(GRIB1ImageMetadata.nativeMetadataFormatName);
if (root != null) {
Node gdsNode = root.getFirstChild();
if (gdsNode != null) {
final NamedNodeMap attributes = gdsNode.getAttributes();
if (attributes != null) {
final int numAttributes = attributes.getLength();
for (int i = 0; i < numAttributes; i++) {
final Node node = attributes.item(i);
if (node != null) {
attributesMap.put(node.getNodeName(), node.getNodeValue());
}
}
}
}
final Node pdsNode = gdsNode.getNextSibling();
if (pdsNode != null) {
final NamedNodeMap attributes = pdsNode.getAttributes();
if (attributes != null) {
final int numAttributes = attributes.getLength();
for (int i = 0; i < numAttributes; i++) {
Node node = attributes.item(i);
if (node != null) {
attributesMap.put(node.getNodeName(), node.getNodeValue());
}
}
}
}
final Node pdsLevelNode = pdsNode.getNextSibling();
if (pdsLevelNode != null) {
final NamedNodeMap attributes = pdsLevelNode.getAttributes();
if (attributes != null) {
final int numAttributes = attributes.getLength();
for (int i = 0; i < numAttributes; i++) {
Node node = attributes.item(i);
if (node != null) {
attributesMap.put(node.getNodeName(), node.getNodeValue());
}
}
}
}
}
}
} catch (IOException e) {
throw new IllegalArgumentException("Unable parsing metadata");
}
}
private static byte[] convertChartToByteArray(
Chart chartDetails, JFreeChart chart, int width, int height)
throws IOException, IIOInvalidTreeException {
BufferedImage buffImg =
chart.createBufferedImage(
width, height, BufferedImage.BITMASK | BufferedImage.SCALE_SMOOTH, null);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageWriter writer = ImageIO.getImageWritersByFormatName("png").next();
ImageWriteParam writeParam = writer.getDefaultWriteParam();
ImageTypeSpecifier typeSpecifier =
ImageTypeSpecifier.createFromBufferedImageType(BufferedImage.TYPE_INT_RGB);
IIOMetadata metadata = writer.getDefaultImageMetadata(typeSpecifier, writeParam);
if (chartDetails != null) {
if (chartDetails.getId() == null) {
chartDetails.setId("%ID%");
}
IIOMetadataNode textEntry = new IIOMetadataNode("tEXtEntry");
textEntry.setAttribute("keyword", "chart-google-data");
ByteArrayOutputStream bout = new ByteArrayOutputStream();
ObjectOutputStream objectOutputStream = new ObjectOutputStream(bout);
objectOutputStream.writeObject(chartDetails);
objectOutputStream.flush();
textEntry.setAttribute(
"value",
(String)
ChartRendererFactory.getRendererForOutput(ChartRendererGoogleTools.TYPE)
.renderChart(chartDetails));
IIOMetadataNode text = new IIOMetadataNode("tEXt");
text.appendChild(textEntry);
IIOMetadataNode root = new IIOMetadataNode("javax_imageio_png_1.0");
root.appendChild(text);
metadata.mergeTree("javax_imageio_png_1.0", root);
}
// setDPI(metadata);
final ImageOutputStream stream = ImageIO.createImageOutputStream(baos);
try {
writer.setOutput(stream);
writer.write(metadata, new IIOImage(buffImg, null, metadata), writeParam);
} finally {
stream.close();
}
byte[] bytes = baos.toByteArray(); // ChartUtilities.encodeAsPNG(buffImg, true, 9);
return bytes;
}
/**
* Set dpi in a JPEG file
*
* @param metadata the meta data
* @param dpi the dpi
* @throws IIOInvalidTreeException if something goes wrong
*/
static void updateMetadata(IIOMetadata metadata, int dpi) throws IIOInvalidTreeException {
debugLogMetadata(metadata, JPEG_NATIVE_FORMAT);
// https://svn.apache.org/viewvc/xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/image/writer/imageio/ImageIOJPEGImageWriter.java
// http://docs.oracle.com/javase/6/docs/api/javax/imageio/metadata/doc-files/jpeg_metadata.html
Element root = (Element) metadata.getAsTree(JPEG_NATIVE_FORMAT);
NodeList jvarNodeList = root.getElementsByTagName("JPEGvariety");
Element jvarChild;
if (jvarNodeList.getLength() == 0) {
jvarChild = new IIOMetadataNode("JPEGvariety");
root.appendChild(jvarChild);
} else {
jvarChild = (Element) jvarNodeList.item(0);
}
NodeList jfifNodeList = jvarChild.getElementsByTagName("app0JFIF");
Element jfifChild;
if (jfifNodeList.getLength() == 0) {
jfifChild = new IIOMetadataNode("app0JFIF");
jvarChild.appendChild(jfifChild);
} else {
jfifChild = (Element) jfifNodeList.item(0);
}
if (jfifChild.getAttribute("majorVersion").length() == 0) {
jfifChild.setAttribute("majorVersion", "1");
}
if (jfifChild.getAttribute("minorVersion").length() == 0) {
jfifChild.setAttribute("minorVersion", "2");
}
jfifChild.setAttribute("resUnits", "1"); // inch
jfifChild.setAttribute("Xdensity", Integer.toString(dpi));
jfifChild.setAttribute("Ydensity", Integer.toString(dpi));
if (jfifChild.getAttribute("thumbWidth").length() == 0) {
jfifChild.setAttribute("thumbWidth", "0");
}
if (jfifChild.getAttribute("thumbHeight").length() == 0) {
jfifChild.setAttribute("thumbHeight", "0");
}
metadata.setFromTree(JPEG_NATIVE_FORMAT, root); // mergeTree doesn't work for ARGB
}
@SuppressWarnings("unused")
private boolean saveJpeg(int[] byteArray, int width, int height, int dpi, String file) {
BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
WritableRaster wr = bufferedImage.getRaster();
wr.setPixels(0, 0, width, height, byteArray);
try {
// Image writer
JPEGImageWriter imageWriter =
(JPEGImageWriter) ImageIO.getImageWritersBySuffix("jpeg").next();
ImageOutputStream ios = ImageIO.createImageOutputStream(new File(file));
imageWriter.setOutput(ios);
// Compression
JPEGImageWriteParam jpegParams = (JPEGImageWriteParam) imageWriter.getDefaultWriteParam();
jpegParams.setCompressionMode(JPEGImageWriteParam.MODE_EXPLICIT);
jpegParams.setCompressionQuality(0.85f);
// Metadata (dpi)
IIOMetadata data =
imageWriter.getDefaultImageMetadata(new ImageTypeSpecifier(bufferedImage), jpegParams);
Element tree = (Element) data.getAsTree("javax_imageio_jpeg_image_1.0");
Element jfif = (Element) tree.getElementsByTagName("app0JFIF").item(0);
jfif.setAttribute("Xdensity", Integer.toString(dpi));
jfif.setAttribute("Ydensity", Integer.toString(dpi));
jfif.setAttribute("resUnits", "1"); // density is dots per inch
// Write and clean up
imageWriter.write(data, new IIOImage(bufferedImage, null, null), jpegParams);
ios.close();
imageWriter.dispose();
} catch (Exception e) {
return false;
}
return true;
}
@SuppressWarnings("unused")
private static void setDPI(IIOMetadata metadata) throws IIOInvalidTreeException {
// for PNG, it's dots per millimeter
double dotsPerMilli = 1.0 * 600 / 10 / 2.54;
IIOMetadataNode horiz = new IIOMetadataNode("HorizontalPixelSize");
horiz.setAttribute("value", Double.toString(dotsPerMilli));
IIOMetadataNode vert = new IIOMetadataNode("VerticalPixelSize");
vert.setAttribute("value", Double.toString(dotsPerMilli));
IIOMetadataNode dim = new IIOMetadataNode("Dimension");
dim.appendChild(horiz);
dim.appendChild(vert);
IIOMetadataNode root = new IIOMetadataNode("javax_imageio_1.0");
root.appendChild(dim);
metadata.mergeTree("javax_imageio_1.0", root);
}
private void writeHeader(IIOMetadata streamMetadata, int bitsPerPixel) throws IOException {
GIFWritableStreamMetadata sm;
if (streamMetadata instanceof GIFWritableStreamMetadata) {
sm = (GIFWritableStreamMetadata) streamMetadata;
} else {
sm = new GIFWritableStreamMetadata();
Node root = streamMetadata.getAsTree(STREAM_METADATA_NAME);
sm.setFromTree(STREAM_METADATA_NAME, root);
}
writeHeader(
sm.version,
sm.logicalScreenWidth,
sm.logicalScreenHeight,
sm.colorResolution,
sm.pixelAspectRatio,
sm.backgroundColorIndex,
sm.sortFlag,
bitsPerPixel,
sm.globalColorTable);
}