/**
* 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;
}
/**
* Returns the default write parameters for encoding the image.
*
* @param iiowriter The IIO ImageWriter that will be used
* @param image the image to be encoded
* @param params the parameters for this writer instance
* @return the IIO ImageWriteParam instance
*/
protected ImageWriteParam getDefaultWriteParam(
javax.imageio.ImageWriter iiowriter, RenderedImage image, ImageWriterParams params) {
ImageWriteParam param = iiowriter.getDefaultWriteParam();
System.err.println("Param: " + params);
if ((params != null) && (params.getCompressionMethod() != null)) {
param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
param.setCompressionType(params.getCompressionMethod());
}
return param;
}
/**
* @see ImageWriter#writeImage(java.awt.image.RenderedImage, java.io.OutputStream,
* org.apache.batik.ext.awt.image.spi.ImageWriterParams)
*/
public void writeImage(RenderedImage image, OutputStream out, ImageWriterParams params)
throws IOException {
BufferedImage bi;
if (image instanceof BufferedImage) {
bi = (BufferedImage) image;
} else {
// TODO Is this the right way?
bi = GraphicsUtil.makeLinearBufferedImage(image.getWidth(), image.getHeight(), false);
}
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
if (params != null) {
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
if (params.getJPEGQuality() != null) {
param.setQuality(
params.getJPEGQuality().floatValue(), params.getJPEGForceBaseline().booleanValue());
}
encoder.encode(bi, param);
} else {
encoder.encode(bi);
}
}
