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An Open Source JavaFX PDF Viewer
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2015 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---------------
* StandardImageIO.java
* ---------------
*/
package org.jpedal.examples.handlers;
import org.jpedal.color.GenericColorSpace;
import org.jpedal.exception.PdfException;
import org.jpedal.external.ImageHelper;
import org.jpedal.utils.LogWriter;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
import java.awt.*;
import java.awt.image.*;
import java.io.*;
import java.util.Iterator;
//
public class StandardImageIO implements ImageHelper {
public StandardImageIO(){
ImageIO.setUseCache(false);
}
/**
*
* @param image
* @param type
* @param file_name
* @throws IOException
*/
@Override
public void write(BufferedImage image, final String type, final String file_name) throws IOException {
//
ImageIO.write(image,type,new File(file_name));
/**/
//
}
/**
*
* @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) {
//tell user and log
if(LogWriter.isOutput()) {
LogWriter.writeLog("Exception: " + e.getMessage());
}
//
} catch (final Error err) {
//tell user and log
if(LogWriter.isOutput()) {
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 Object o = iterator.next();
iir = (ImageReader) 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){
if(LogWriter.isOutput()) {
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 decodeArray PDF object value showing min/max with 1 paired valued per channel (ie [0 1 0 1 0 1 0 1]
* can be float range 0-1 or int 0 -255). if 1 0 invert the value
* @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 float[] decodeArray, final int pX, final int pY) throws PdfException {
return null;
}
}