Large Image examples

JAVA

/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2023 Apryse Group NV
    Authors: Apryse Software.

    For more information, please contact iText Software at this address:
    sales@itextpdf.com
 */
package com.itextpdf.samples.sandbox.images;

import com.itextpdf.kernel.geom.PageSize;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfDictionary;
import com.itextpdf.kernel.pdf.PdfName;
import com.itextpdf.kernel.pdf.PdfStream;
import com.itextpdf.kernel.pdf.xobject.PdfImageXObject;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Image;

import java.io.File;

public class LargeImage1 {
    public static final String DEST = "./target/sandbox/images/large_image1.pdf";

    public static final String SRC = "./src/main/resources/pdfs/large_image.pdf";

    public static void main(String[] args) throws Exception {
        File file = new File(DEST);
        file.getParentFile().mkdirs();

        new LargeImage1().manipulatePdf(DEST);
    }

    protected void manipulatePdf(String dest) throws Exception {
        PdfDocument resultDoc = new PdfDocument(new PdfWriter(dest));
        PdfDocument srcDoc = new PdfDocument(new PdfReader(SRC));

        // Assume that there is a single XObject in the source document
        // and this single object is an image.
        PdfDictionary pageDict = srcDoc.getFirstPage().getPdfObject();
        PdfDictionary pageResources = pageDict.getAsDictionary(PdfName.Resources);
        PdfDictionary pageXObjects = pageResources.getAsDictionary(PdfName.XObject);
        PdfName imgRef = pageXObjects.keySet().iterator().next();
        PdfStream imgStream = pageXObjects.getAsStream(imgRef);
        PdfImageXObject imgObject = new PdfImageXObject((PdfStream) imgStream.copyTo(resultDoc));
        Image image = new Image(imgObject);
        image.scaleToFit(14400, 14400);
        image.setFixedPosition(0, 0);

        srcDoc.close();

        PageSize pageSize = new PageSize(image.getImageScaledWidth(), image.getImageScaledHeight());
        Document doc = new Document(resultDoc, pageSize);
        doc.add(image);

        doc.close();
    }
}

C#

using System;
using System.IO;
using System.Linq;
using iText.Kernel.Geom;
using iText.Kernel.Pdf;
using iText.Kernel.Pdf.Xobject;
using iText.Layout;
using iText.Layout.Element;

namespace iText.Samples.Sandbox.Images
{
    public class LargeImage1
    {
        public static readonly String DEST = "results/sandbox/images/large_image1.pdf";

        public static readonly String SRC = "../../../resources/pdfs/large_image.pdf";

        public static void Main(String[] args)
        {
            FileInfo file = new FileInfo(DEST);
            file.Directory.Create();

            new LargeImage1().ManipulatePdf(DEST);
        }

        protected void ManipulatePdf(String dest)
        {
            PdfDocument resultDoc = new PdfDocument(new PdfWriter(dest));
            PdfDocument srcDoc = new PdfDocument(new PdfReader(SRC));

            // Assume that there is a single XObject in the source document
            // and this single object is an image.
            PdfDictionary pageDict = srcDoc.GetFirstPage().GetPdfObject();
            PdfDictionary pageResources = pageDict.GetAsDictionary(PdfName.Resources);
            PdfDictionary pageXObjects = pageResources.GetAsDictionary(PdfName.XObject);
            PdfName imgRef = pageXObjects.KeySet().First();
            PdfStream imgStream = pageXObjects.GetAsStream(imgRef);
            PdfImageXObject imgObject = new PdfImageXObject((PdfStream) imgStream.CopyTo(resultDoc));
            Image image = new Image(imgObject);
            image.ScaleToFit(14400, 14400);
            image.SetFixedPosition(0, 0);

            srcDoc.Close();
            
            PageSize pageSize = new PageSize(image.GetImageScaledWidth(), image.GetImageScaledHeight());
            Document doc = new Document(resultDoc, pageSize);
            doc.Add(image);
            
            doc.Close();
        }
    }
}

JAVA

/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2023 Apryse Group NV
    Authors: Apryse Software.

    For more information, please contact iText Software at this address:
    sales@itextpdf.com
 */
package com.itextpdf.samples.sandbox.images;

import com.itextpdf.kernel.geom.PageSize;
import com.itextpdf.kernel.pdf.PdfDictionary;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfName;
import com.itextpdf.kernel.pdf.PdfPage;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfStream;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.xobject.PdfImageXObject;
import com.itextpdf.layout.Canvas;
import com.itextpdf.layout.element.Image;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;

public class LargeImage2 {
    public static final String DEST = "./target/sandbox/images/large_image2.pdf";

    public static final String SRC = "./src/main/resources/pdfs/large_image.pdf";

    public static void main(String[] args) throws Exception {
        File file = new File(DEST);
        file.getParentFile().mkdirs();

        new LargeImage2().manipulatePdf(DEST);
    }

    protected void manipulatePdf(String dest) throws Exception {
        PdfDocument resultDoc = new PdfDocument(new PdfWriter(dest));
        ByteArrayOutputStream tempFile = new ByteArrayOutputStream();

        // The source pdf document's page size is expected to be huge: more than 14400 in width in height
        PdfDocument tempDoc = new PdfDocument(new PdfReader(SRC), new PdfWriter(tempFile));

        // Assume that there is a single XObject in the source document
        // and this single object is an image.
        PdfDictionary pageDict = tempDoc.getFirstPage().getPdfObject();
        PdfDictionary pageResources = pageDict.getAsDictionary(PdfName.Resources);
        PdfDictionary pageXObjects = pageResources.getAsDictionary(PdfName.XObject);
        PdfName imgRef = pageXObjects.keySet().iterator().next();
        PdfStream imgStream = pageXObjects.getAsStream(imgRef);
        PdfImageXObject imgObject = new PdfImageXObject(imgStream);
        Image img = new Image(imgObject);
        img.scaleToFit(14400, 14400);
        img.setFixedPosition(0, 0);

        tempDoc.addNewPage(1, new PageSize(img.getImageScaledWidth(), img.getImageScaledHeight()));
        PdfPage page = tempDoc.getFirstPage();
        new Canvas(page, page.getPageSize())
                .add(img)
                .close();
        tempDoc.close();

        PdfDocument docToCopy = new PdfDocument(new PdfReader(new ByteArrayInputStream(tempFile.toByteArray())));
        docToCopy.copyPagesTo(1, 1, resultDoc);

        docToCopy.close();
        resultDoc.close();
    }
}

C#

using System;
using System.IO;
using System.Linq;
using iText.IO.Source;
using iText.Kernel.Geom;
using iText.Kernel.Pdf;
using iText.Kernel.Pdf.Xobject;
using iText.Layout;
using iText.Layout.Element;

namespace iText.Samples.Sandbox.Images
{
    public class LargeImage2
    {
        public static readonly String DEST = "results/sandbox/images/large_image2.pdf";

        public static readonly String SRC = "../../../resources/pdfs/large_image.pdf";

        public static void Main(String[] args)
        {
            FileInfo file = new FileInfo(DEST);
            file.Directory.Create();

            new LargeImage2().ManipulatePdf(DEST);
        }

        protected void ManipulatePdf(String dest)
        {
            PdfDocument resultDoc = new PdfDocument(new PdfWriter(dest));
            MemoryStream tempFile = new ByteArrayOutputStream();
            
            // The source pdf document's page size is expected to be huge: more than 14400 in width in height
            PdfDocument tempDoc = new PdfDocument(new PdfReader(SRC), new PdfWriter(tempFile));

            // Assume that there is a single XObject in the source document
            // and this single object is an image.
            PdfDictionary pageDict = tempDoc.GetFirstPage().GetPdfObject();
            PdfDictionary pageResources = pageDict.GetAsDictionary(PdfName.Resources);
            PdfDictionary pageXObjects = pageResources.GetAsDictionary(PdfName.XObject);
            PdfName imgRef = pageXObjects.KeySet().First();
            PdfStream imgStream = pageXObjects.GetAsStream(imgRef);
            PdfImageXObject imgObject = new PdfImageXObject(imgStream);
            Image img = new Image(imgObject);
            img.ScaleToFit(14400, 14400);
            img.SetFixedPosition(0, 0);

            tempDoc.AddNewPage(1, new PageSize(img.GetImageScaledWidth(), img.GetImageScaledHeight()));
            PdfPage page = tempDoc.GetFirstPage();
            new Canvas(page, page.GetPageSize())
                .Add(img)
                .Close();
            tempDoc.Close();
            
            PdfDocument docToCopy = new PdfDocument(new PdfReader(new MemoryStream(tempFile.ToArray())));
            docToCopy.CopyPagesTo(1, 1, resultDoc);

            docToCopy.Close();
            resultDoc.Close();
        }
    }
}