/
AddImageToLayer.java
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/
AddImageToLayer.java
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package mkl.testarea.itext7.content;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import org.junit.BeforeClass;
import org.junit.Test;
import com.itextpdf.io.image.ImageData;
import com.itextpdf.io.image.ImageDataFactory;
import com.itextpdf.io.util.StreamUtil;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.kernel.pdf.layer.PdfLayer;
import com.itextpdf.layout.Canvas;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Image;
import com.itextpdf.layout.element.Paragraph;
public class AddImageToLayer {
final static File RESULT_FOLDER = new File("target/test-outputs", "content");
@BeforeClass
public static void setUpBeforeClass() throws Exception {
RESULT_FOLDER.mkdirs();
}
/**
* <a href="https://stackoverflow.com/questions/52926448/adding-image-layers-to-a-pdf-using-itext-5-or-7">
* Adding image layers to a pdf using iText 5 or 7
* </a>
* <p>
* This test shows how to add images in a layer, once via a
* {@link Canvas} to allow iText style layout'ing and once
* directly.
* </p>
*/
@Test
public void testAddLikeIan() throws IOException {
try ( PdfWriter writer = new PdfWriter(new File(RESULT_FOLDER, "addImageToLayerLikeIan.pdf"));
PdfDocument pdfDoc = new PdfDocument(writer);
Document document = new Document(pdfDoc);
InputStream imageResource = getClass().getResourceAsStream("/mkl/testarea/itext7/annotate/Willi-1.jpg")) {
ImageData data = ImageDataFactory.create(StreamUtil.inputStreamToArray(imageResource));
Image img = new Image(data);
PdfLayer pdflayer = new PdfLayer("main layer", pdfDoc);
pdflayer.setOn(true);
// using a Canvas, to allow iText layout'ing the image
PdfCanvas pdfCanvas = new PdfCanvas(pdfDoc.addNewPage());
try ( Canvas canvas = new Canvas(pdfCanvas, document.getPageEffectiveArea(pdfDoc.getDefaultPageSize())) ) {
canvas.add(new Paragraph("This image is added using a Canvas:"));
pdfCanvas.beginLayer(pdflayer);
canvas.add(img);
pdfCanvas.endLayer();
canvas.add(new Paragraph("And this image is added immediately:"));
}
// or directly
pdfCanvas.beginLayer(pdflayer);
pdfCanvas.addImageAt(data, 100, 100, false);
pdfCanvas.endLayer();
}
}
}