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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 1997-2017 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
*
* ---------------
* ExampleColorHandler.java
* ---------------
*/
package org.jpedal.examples.handlers;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import org.jpedal.color.PdfPaint;
import org.jpedal.external.ColorHandler;
public class ExampleColorHandler implements ColorHandler {
/**allow user to alter colour (ie to convert to bw)*/
@Override
public void setPaint(final Graphics2D g2, final PdfPaint col, final int pageNumber, final boolean isPrinting) {
//if(isPrinting)
//System.out.println("page="+pageNumber);
//example here converts to bw for printing
if(isPrinting){ //only on printout
final int rgb=col.getRGB();
//black and white conversion
if(rgb>-16777216/2) //less than 50% is white
{
g2.setPaint(Color.WHITE);
} else {
g2.setPaint(Color.BLACK);
}
//grayscale conversion
//get the value
//float[] val=new float[3];
//val[0]=((rgb>>16) & 255)/255f;
//val[1]=((rgb>>8) & 255)/255f;
//val[2]=(rgb & 255)/255f;
//to gray
//ColorSpace cs=ColorSpace.getInstance(ColorSpace.CS_GRAY);
//float[] grayVal=cs.fromRGB(val);
//Color colGray= new Color(cs,grayVal,1f);
//g2.setPaint(colGray);
}else {
g2.setPaint(col);
}
}
/**allow user to alter colour (ie to convert to bw)*/
@Override
public BufferedImage processImage(final BufferedImage image, final int pageNumber, final boolean isPrinting) {
BufferedImage newImage=null;
if(isPrinting){ //only on printout
//black and white conversion
newImage=new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_BYTE_BINARY);
final Graphics2D newG2bw=newImage.createGraphics();
newG2bw.setPaint(Color.WHITE);
newG2bw.fillRect(0,0,image.getWidth(), image.getHeight());
newG2bw.drawImage(image,0,0,null);
//grayscale conversion
// newImage=new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_BYTE_GRAY);
// Graphics2D newG2=newImage.createGraphics();
// newG2.setPaint(Color.WHITE);
// newG2.fillRect(0,0,image.getWidth(), image.getHeight());
// newG2.drawImage(image,0,0,null);
}
return newImage;
}
}