/**
* 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;
}
/**
* 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
}
}
}