org.jpedal.io.JAITiffHelper Maven / Gradle / Ivy
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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/java-pdf-library-support/
*
* (C) Copyright 1997-2013, IDRsolutions and Contributors.
*
* This file is part of JPedal
*
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
*
* ---------------
* JAITiffHelper.java
* ---------------
*/
package org.jpedal.io;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.File;
import java.io.IOException;
import org.jpedal.utils.LogWriter;
import com.sun.media.jai.codec.FileSeekableStream;
import com.sun.media.jai.codec.ImageCodec;
import com.sun.media.jai.codec.ImageDecoder;
public class JAITiffHelper {
private ImageDecoder dec;
private int pageCount = 0;
/**
* setup access to Tif file and also read page count
*/
public JAITiffHelper(String file) {
try {
// Get file info
File imgFile = new File(file);
FileSeekableStream s = new FileSeekableStream(imgFile);
this.dec = ImageCodec.createImageDecoder("tiff", s, null);
this.pageCount = this.dec.getNumPages();
}
catch (Exception e) {
// tell user and log
if (LogWriter.isOutput()) LogWriter.writeLog("Exception: " + e.getMessage());
}
}
public int getTiffPageCount() {
return this.pageCount;
}
public BufferedImage getImage(int tiffImageToLoad) {
BufferedImage img = null;
try {
RenderedImage op = new javax.media.jai.NullOpImage(this.dec.decodeAsRenderedImage(tiffImageToLoad), null, null,
javax.media.jai.OpImage.OP_IO_BOUND);
img = (javax.media.jai.JAI.create("affine", op, null, new javax.media.jai.InterpolationBicubic(1))).getAsBufferedImage();
/** change to grey as default */
img = ColorSpaceConvertor.convertColorspace(img, BufferedImage.TYPE_BYTE_GRAY);
}
catch (IOException e) {
// tell user and log
if (LogWriter.isOutput()) LogWriter.writeLog("Exception: " + e.getMessage());
}
return img;
}
}