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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


 *
 * ---------------
 * ExampleHelper.java
 * ---------------
 */
package org.jpedal.examples;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;

import org.jpedal.color.PdfPaint;
import org.jpedal.external.JPedalHelper;
import org.jpedal.fonts.PdfFont;
import org.jpedal.fonts.glyph.PdfJavaGlyphs;

public class ExampleHelper implements JPedalHelper {

	/** allow user to alter font mapping for substitution - return null if not used */
	@Override
	public Font setFont(PdfJavaGlyphs pdfJavaGlyphs, String name, int size) {
		return null;
	}

	/** allow user to alter font mapping for substitution - return null if not used */
	@Override
	public Font getJavaFontX(PdfFont pdfFont, int size) {
		return null;
	}

	/** allow user to alter colour (ie to convert to bw) */
	@Override
	public void setPaint(Graphics2D g2, PdfPaint col, int pageNumber, boolean isPrinting) {

		// if(isPrinting)
		// System.out.println("page="+pageNumber);

		// example here converts to bw for printing
		if (isPrinting) { // only on printout

			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(BufferedImage image, int pageNumber, 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);
			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;
	}
}