org.jpedal.examples.handlers.StandardImageIO Maven / Gradle / Ivy
/*
* ===========================================
* 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;
}
}