Java Tutorial/PDF/PdfContentByte

Clip a region

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.Image;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("clipping_path.pdf"));
    document.open();
    Image img = Image.getInstance("dog.jpg");
    float w = img.scaledWidth();
    float h = img.scaledHeight();
    PdfContentByte cb = writer.getDirectContent();
    cb.saveState();
    cb.circle(260, 700, 70);
    cb.clip();
    cb.newPath();
    cb.addImage(img, w, 0, 0, h, 36, 620);
    cb.restoreState();

    document.close();
  }
}

Draw shape with PdfContentByte

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document.rupress = false;
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    document.open();
    document.add(new Paragraph("this is a test."));
    PdfContentByte cb = writer.getDirectContent();
    cb.moveTo(30, 70);
    cb.lineTo(49, 70);
    cb.lineTo(49, 80);
    cb.lineTo(30, 80);
    cb.closePath();
    cb.rectangle(30, 700, 460, 100);
    document.close();
  }
}

Literal PdfContentByte

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document.rupress = false;
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("logo.pdf"));
    document.open();
    PdfContentByte cb = writer.getDirectContent();
    String eye = "this is a test";
    cb.setLiteral(eye);
    document.close();
  }
}

Position and resize an image

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.Image;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document.rupress = false;
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    document.open();
    PdfContentByte cb = writer.getDirectContent();
    Image eye = Image.getInstance("iTextLogo.gif");
    eye.setAbsolutePosition(36, 780);
    cb.addImage(eye, true);
    cb.addImage(eye, 271, -50, -30, 550, 100, 100, true);
    document.close();
  }
}

restore State

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document.rupress = false;
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    document.open();
    PdfContentByte cb = writer.getDirectContent();
    cb.saveState();
    cb.moveTo(72, 650);
    cb.lineTo(72, 600);
    cb.moveTo(144, 650);
    cb.lineTo(144, 600);
    cb.stroke();
    cb.restoreState();
    document.close();
  }
}

Save paint state

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document.rupress = false;
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    document.open();
    PdfContentByte cb = writer.getDirectContent();
    cb.saveState();
    for (int i = 25; i > 0; i--) {
      cb.setLineWidth((float) i / 10);
      cb.moveTo(40, 806 - (5 * i));
      cb.lineTo(320, 806 - (5 * i));
      cb.stroke();
    }
    cb.restoreState();
    document.close();
  }
}