questions.images.MakingImageTransparent.java Source code

Introduction

Here is the source code for questions.images.MakingImageTransparent.java

Source

/*
 * This example was written by Bruno Lowagie, author of the book
 * 'iText in Action' by Manning Publications (ISBN: 1932394796).
 * You can use this example as inspiration for your own applications.
 * The following license applies:
 * http://www.1t3xt.com/about/copyright/index.php?page=MIT
 */

package questions.images;

import java.awt.Color;
import java.awt.Toolkit;
import java.io.FileOutputStream;
import java.io.IOException;

import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Image;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.PdfWriter;

public class MakingImageTransparent {

    public static final String GIF = "resources/questions/img/handwritten.gif";
    public static final String JPG = "resources/questions/img/handwritten.jpg";
    public static final String RESULT = "results/questions/images/transparent_images.pdf";

    public static void main(String args[]) {
        try {
            Rectangle rect;
            // GIF Image
            Image gif = Image.getInstance(GIF);
            gif.setAbsolutePosition(0, 0);
            gif.setTransparency(new int[] { 0x5B, 0x5D });
            rect = new Rectangle(gif.getScaledWidth(), gif.getScaledHeight());
            rect.setBackgroundColor(Color.YELLOW);

            Document document = new Document(rect);
            PdfWriter.getInstance(document, new FileOutputStream(RESULT));
            document.open();
            document.add(gif);

            // JPEG Image
            java.awt.Image awtImage = Toolkit.getDefaultToolkit().createImage(JPG);
            Image jpg = Image.getInstance(awtImage, null, true);
            jpg.setTransparency(new int[] { 0xF0, 0xFF });
            jpg.setAbsolutePosition(0, 0);
            rect = new Rectangle(jpg.getScaledWidth(), jpg.getScaledHeight());
            rect.setBackgroundColor(Color.YELLOW);

            document.setPageSize(rect);
            document.newPage();
            document.add(jpg);
            document.close();
        } catch (DocumentException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}