/**
* @see ImageWriter#writeImage(java.awt.image.RenderedImage, java.io.OutputStream,
* ImageWriterParams)
*/
public void writeImage(RenderedImage image, OutputStream out, ImageWriterParams params)
throws IOException {
Iterator iter;
iter = ImageIO.getImageWritersByMIMEType(getMIMEType());
javax.imageio.ImageWriter iiowriter = null;
try {
iiowriter = (javax.imageio.ImageWriter) iter.next();
if (iiowriter != null) {
iiowriter.addIIOWriteWarningListener(this);
ImageOutputStream imgout = null;
try {
imgout = ImageIO.createImageOutputStream(out);
ImageWriteParam iwParam = getDefaultWriteParam(iiowriter, image, params);
ImageTypeSpecifier type;
if (iwParam.getDestinationType() != null) {
type = iwParam.getDestinationType();
} else {
type = ImageTypeSpecifier.createFromRenderedImage(image);
}
// Handle metadata
IIOMetadata meta = iiowriter.getDefaultImageMetadata(type, iwParam);
// meta might be null for some JAI codecs as they don't support metadata
if (params != null && meta != null) {
meta = updateMetadata(meta, params);
}
// Write image
iiowriter.setOutput(imgout);
IIOImage iioimg = new IIOImage(image, null, meta);
iiowriter.write(null, iioimg, iwParam);
} finally {
if (imgout != null) {
System.err.println("closing");
imgout.close();
}
}
} else {
throw new UnsupportedOperationException(
"No ImageIO codec for writing " + getMIMEType() + " is available!");
}
} finally {
if (iiowriter != null) {
System.err.println("disposing");
iiowriter.dispose();
}
}
}
public void compressJpegFile(
File infile, File outfile, float compressionQuality, int widthCanvas, int heightCanvas)
throws IOException {
// Retrieve jpg image to be compressed
BufferedImage rendImage = ImageIO.read(infile);
widthFile = rendImage.getWidth();
heightFile = rendImage.getHeight();
double aspectRatioCanvas = widthCanvas / heightCanvas;
double aspectRatioFile = widthFile / heightFile;
widthFile = widthCanvas;
heightFile = widthCanvas / aspectRatioFile;
if (heightFile > heightCanvas) {
heightFile = heightCanvas;
widthFile = heightCanvas * aspectRatioFile;
}
this.width = (int) widthFile;
this.height = (int) heightFile;
ImageTypeSpecifier its = ImageTypeSpecifier.createFromRenderedImage(rendImage);
BufferedImage outImage = its.createBufferedImage(width, height);
Graphics2D graphics2D = outImage.createGraphics();
graphics2D.setRenderingHint(
RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
// graphics2D.drawRenderedImage(rendImage, new AffineTransform());
graphics2D.drawImage(rendImage, 0, 0, width, height, null);
// Find a jpeg writer
ImageWriter writer = null;
Iterator iter = ImageIO.getImageWritersByFormatName("jpg");
if (iter.hasNext()) {
writer = (ImageWriter) iter.next();
}
// Prepare output file
ImageOutputStream ios = ImageIO.createImageOutputStream(outfile);
writer.setOutput(ios);
// Set the compression quality
ImageWriteParam iwparam = new JPEGImageWriteParam(Locale.getDefault());
iwparam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwparam.setCompressionQuality(compressionQuality);
// Write the image
writer.write(null, new IIOImage(outImage, null, null), iwparam);
// infile.delete();
// Cleanup
ios.flush();
writer.dispose();
ios.close();
// return
}
public static List<File> createTiffFiles(List<IIOImage> imageList, int index, int dpiX, int dpiY)
throws IOException {
List<File> tiffFiles = new ArrayList<File>();
// Set up the writeParam
TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
// Get tif writer and set output to file
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
ImageWriter writer = writers.next();
if (writer == null) {
throw new RuntimeException(
"Need to install JAI Image I/O package.\nhttps://jai-imageio.dev.java.net");
}
// Get the stream metadata
IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
// all if index == -1; otherwise, only index-th
for (IIOImage oimage : (index == -1 ? imageList : imageList.subList(index, index + 1))) {
if (dpiX != 0 && dpiY != 0) {
// Get the default image metadata.
ImageTypeSpecifier imageType =
ImageTypeSpecifier.createFromRenderedImage(oimage.getRenderedImage());
IIOMetadata imageMetadata = writer.getDefaultImageMetadata(imageType, null);
imageMetadata = setDPIViaAPI(imageMetadata, dpiX, dpiY);
oimage.setMetadata(imageMetadata);
}
File tiffFile = File.createTempFile(OUTPUT_FILE_NAME, TIFF_EXT);
ImageOutputStream ios = ImageIO.createImageOutputStream(tiffFile);
writer.setOutput(ios);
writer.write(streamMetadata, oimage, tiffWriteParam);
ios.close();
tiffFiles.add(tiffFile);
}
writer.dispose();
return tiffFiles;
}
/**
* Returns <code>true</code> if the <code>ImageWriter</code> implementation associated with this
* service provider is able to encode the given <code>RenderedImage</code> instance. Note that
* this includes instances of <code>java.awt.image.BufferedImage</code>.
*
* <p>See the discussion for <code>canEncodeImage(ImageTypeSpecifier)</code> for information on
* the semantics of this method.
*
* @param im an instance of <code>RenderedImage</code> to be encoded.
* @return <code>true</code> if this writer is likely to be able to encode this image.
* @exception IllegalArgumentException if <code>im</code> is <code>null</code>.
*/
public boolean canEncodeImage(RenderedImage im) {
return canEncodeImage(ImageTypeSpecifier.createFromRenderedImage(im));
}
