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;
}
public Iterator getImageTypes(int imageIndex) throws IOException {
readFile();
checkIndex(imageIndex);
// Create a List of ImageTypeSpecifiers that identify the possible image
// types to which the single JBIG2 image can be decoded. An
// ImageTypeSpecifier is used with ImageReader's getDestination() method
// to return an appropriate BufferedImage that contains the decoded
// image, and is accessed by an application.
List l = new ArrayList();
// The JBIG2 reader only uses a single List entry. This entry describes
// a
// BufferedImage of TYPE_INT_RGB, which is a commonly used image type.
l.add(ImageTypeSpecifier.createFromBufferedImageType(BufferedImage.TYPE_BYTE_BINARY));
// Return an iterator that retrieves elements from the list.
return l.iterator();
}
public Iterator<ImageTypeSpecifier> getImageTypes(int pIndex) throws IOException {
checkBounds(pIndex);
init(pIndex);
// TODO: FIX ME!
// - Use factory methods for ImageTypeSpecifier, create factory methods if necessary
List<ImageTypeSpecifier> specs = new ArrayList<ImageTypeSpecifier>();
try {
ColorModel cm;
// NOTE: These are all fall-through by intention
switch (mImage.getImageType()) {
case ImageType.BilevelType:
specs.add(
IndexedImageTypeSpecifier.createFromIndexColorModel(
MonochromeColorModel.getInstance()));
case ImageType.GrayscaleType:
// cm = MagickUtil.CM_GRAY_OPAQUE;
// specs.add(new ImageTypeSpecifier(
// cm,
// cm.createCompatibleSampleModel(1, 1)
// ));
specs.add(ImageTypeSpecifier.createFromBufferedImageType(BufferedImage.TYPE_BYTE_GRAY));
case ImageType.GrayscaleMatteType:
cm = CM_GRAY_ALPHA;
specs.add(new ImageTypeSpecifier(cm, cm.createCompatibleSampleModel(1, 1)));
case ImageType.PaletteType:
specs.add(
IndexedImageTypeSpecifier.createFromIndexColorModel(
MagickUtil.createIndexColorModel(mImage.getColormap(), false)));
case ImageType.PaletteMatteType:
specs.add(
IndexedImageTypeSpecifier.createFromIndexColorModel(
MagickUtil.createIndexColorModel(mImage.getColormap(), true)));
case ImageType.TrueColorType:
// cm = MagickUtil.CM_COLOR_OPAQUE;
// specs.add(new ImageTypeSpecifier(
// cm,
// cm.createCompatibleSampleModel(1, 1)
// ));
specs.add(ImageTypeSpecifier.createFromBufferedImageType(BufferedImage.TYPE_3BYTE_BGR));
case ImageType.TrueColorMatteType:
// cm = MagickUtil.CM_COLOR_ALPHA;
// specs.add(new ImageTypeSpecifier(
// cm,
// cm.createCompatibleSampleModel(1, 1)
// ));
specs.add(
ImageTypeSpecifier.createFromBufferedImageType(BufferedImage.TYPE_4BYTE_ABGR_PRE));
break;
case ImageType.ColorSeparationType:
case ImageType.ColorSeparationMatteType:
case ImageType.OptimizeType:
default:
throw new MagickException("Unknown JMagick image type: " + mImage.getImageType());
}
} catch (MagickException e) {
throw new IIOException(e.getMessage(), e);
}
return specs.iterator();
}
