my problem is when using imageio.write i am seeing that is using hdd, also read about jDeli (but too expensive), Apache Commons, JAI that are much faster....
I wanna use the encoded bytes returned by routine... at a custom Remote Desktop Utility...
public static byte[] imageToJPEGByteArray(Image aImage, int width, int height, int qualityPercent) throws IOException {
byte[] imageBytes = new byte[0];
float quality = 75 / 100f;
BufferedImage destImage;
destImage = SwingFXUtils.fromFXImage(aImage, null);
// Output JPEG byte array
ByteArrayOutputStream baos = new ByteArrayOutputStream();
if(qualityPercent != -1) {
// Start to create JPEG with quality option
ImageWriter writer = null;
Iterator iter = ImageIO.getImageWritersByFormatName("gif");
if (iter.hasNext()) {
writer = (ImageWriter) iter.next();
}
ImageOutputStream ios = ImageIO.createImageOutputStream(baos);
writer.setOutput(ios);
ImageWriteParam iwparam = new JPEGImageWriteParam(Locale.getDefault());
iwparam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwparam.setCompressionQuality(quality);
writer.write(null, new IIOImage(destImage, null, null), iwparam);
ios.flush();
writer.dispose();
ios.close();
// Done creating JPEG with quality option
} else {
// This one line below created a JPEG file without quality option
ImageIO.write(destImage, "gif", baos);
}
baos.flush();
imageBytes = baos.toByteArray();
baos.close();
// Done
return imageBytes;
}
If you are saying that you've observed that this code appears to cause disk activity when saving to ByteArrayOutputStream
perhaps you should try setting the ImageIO
"use cache" flag to false
:
ImageIO.setUseCache(false);
Javadoc for setUseCache
says:
Sets a flag indicating whether a disk-based cache file should be used when creating ImageInputStream and ImageOutputStreams.