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Open Source (LGPL) JavaFX PDF Viewer for NetBeans plugin
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/*
 * ===========================================
 * Java Pdf Extraction Decoding Access Library
 * ===========================================
 *
 * Project Info:  http://www.idrsolutions.com
 * Help section for developers at http://www.idrsolutions.com/support/
 *
 * (C) Copyright 1997-2017 IDRsolutions and Contributors.
 *
 * This file is part of JPedal/JPDF2HTML5
 *
 @LICENSE@
 *
 * ---------------
 * StandardImageIO.java
 * ---------------
 */
package org.jpedal.examples.handlers;

import java.awt.image.BufferedImage;
import java.awt.image.Raster;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;

import org.jpedal.color.GenericColorSpace;
import org.jpedal.exception.PdfException;
import org.jpedal.external.ExternalHandlers;
import org.jpedal.external.ImageHelper;
import org.jpedal.utils.LogWriter;

public class StandardImageIO implements ImageHelper {

    public StandardImageIO() {
        ImageIO.setUseCache(false);
    }

    /**
     * @param image
     * @param type
     * @param file_name
     * @throws IOException
     */
    @Override
    public void write(final BufferedImage image, final String type, final String file_name) throws IOException {

        ExternalHandlers.ImageLib.write(image, type, file_name, GenericColorSpace.fasterPNG);

    }

    /**
     * @param file_name (including path)
     * @return
     */
    @Override
    public BufferedImage read(final String file_name) {

        BufferedImage image = null;

        try {
            image = ImageIO.read(new File(file_name));

            //BufferedInputStream in = new BufferedInputStream(new FileInputStream(file_name));
            //image = ImageIO.read(in);
            //in.close();
        } catch (final IOException e) {
            LogWriter.writeLog("Exception: " + e.getMessage());
        } catch (final Error err) {

            LogWriter.writeLog("Error: " + err.getMessage());

            throw new RuntimeException("Error " + err + " loading " + file_name + " with ImageIO");

        }

        return image;
    }

    /**
     * @param data (final byte[] data for image file - PNG, TIF, JPEG)
     * @return
     * @throws IOException
     */
    @Override
    public synchronized BufferedImage read(final byte[] data) throws IOException {
        final ByteArrayInputStream bis = new ByteArrayInputStream(data);

        ImageIO.setUseCache(false);

        return ImageIO.read(bis);

    }

    /**
     * @param data (binary data for image file - PNG, TIF, JPEG)
     * @return
     * @throws IOException
     */
    @Override
    public Raster readRasterFromJPeg(final byte[] data) throws IOException {

        Raster ras = null;
        ImageReader iir = null;
        ImageInputStream iin = null;

        final ByteArrayInputStream in = new ByteArrayInputStream(data);

        //suggestion from Carol
        try {
            final Iterator iterator = ImageIO.getImageReadersByFormatName("JPEG");

            while (iterator.hasNext()) {

                final ImageReader o = iterator.next();
                iir = o;
                if (iir.canReadRaster()) {
                    break;
                }
            }

            ImageIO.setUseCache(false);

            iin = ImageIO.createImageInputStream(in);
            iir.setInput(iin, true);   //new MemoryCacheImageInputStream(in));

            ras = iir.readRaster(0, null);

        } catch (final Exception e) {

            LogWriter.writeLog("Unable to find jars on classpath " + e);
        } finally {
            if (in != null) {
                in.close();
            }

            if (iin != null) {
                iin.flush();
                iin.close();
            }

            if (iir != null) {
                iir.dispose();
            }
        }
        return ras;
    }

    /**
     * @param data (binary data for image file - PNG, TIF, JPEG)
     * @param w image width in pixels
     * @param h image height in pixels
     * @param pX sensible image width in pixels (ie what we should downscale to)
     * @param pY sensible image height in pixels (ie what we should downscale
     * to)
     * @return
     * @throws PdfException
     */
    @Override
    public BufferedImage JPEG2000ToRGBImage(final byte[] data, final int w, final int h, final int pX, final int pY) throws PdfException {

        return null;
    }
}