Bekerja dengan Penempatan Gambar

Aspose.PDF untuk Java memperkenalkan kelas yang disebut ImagePlacement, ImagePlacementAbsorber dan ImagePlacementCollection yang menyediakan kemampuan serupa seperti kelas yang dijelaskan di atas untuk mendapatkan resolusi dan posisi gambar dalam dokumen PDF.

• ImagePlacementAbsorber melakukan pencarian penggunaan gambar sebagai koleksi objek ImagePlacement.
• ImagePlacement menyediakan anggota Resolution dan Rectangle yang mengembalikan nilai penempatan gambar aktual.

package com.aspose.pdf.examples;

import com.aspose.pdf.*;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;


import javax.imageio.ImageIO;

public class ExampleWorkingWithImagePlacement {

    private static String _dataDir = "/home/admin1/pdf-examples/Samples/";

    public static void WorkingWithImagePlacement() throws IOException {
        // Muat file PDF sumber
        Document doc = new Document(_dataDir + "ImageInformation.pdf");
        ImagePlacementAbsorber abs = new ImagePlacementAbsorber();

        // Muat konten halaman pertama
        doc.getPages().get_Item(1).accept(abs);
        for (ImagePlacement imagePlacement : abs.getImagePlacements()) {
            // Dapatkan properti gambar
            System.out.println("lebar gambar:" + imagePlacement.getRectangle().getWidth());
            System.out.println("tinggi gambar:" + imagePlacement.getRectangle().getHeight());
            System.out.println("LLX gambar:" + imagePlacement.getRectangle().getLLX());
            System.out.println("LLY gambar:" + imagePlacement.getRectangle().getLLY());
            System.out.println("resolusi horizontal gambar:" + imagePlacement.getResolution().getX());
            System.out.println("resolusi vertikal gambar:" + imagePlacement.getResolution().getY());

            // Ambil gambar dengan dimensi terlihat
            // Bitmap scaledImage;
            // Ambil gambar dari sumber daya
            ByteArrayOutputStream imageStream = new ByteArrayOutputStream();
            imagePlacement.getImage().save(imageStream, ImageType.getPng());

            // Bitmap resourceImage = (Bitmap)Bitmap.FromStream(imageStream);
            BufferedImage resourceImage = ImageIO.read(new ByteArrayInputStream(imageStream.toByteArray()));

            // Buat bitmap dengan dimensi aktual
            BufferedImage scaledImage = toBufferedImage( 
            resourceImage.getScaledInstance((int) imagePlacement.getRectangle().getWidth(),
                    (int) imagePlacement.getRectangle().getHeight(), java.awt.Image.SCALE_SMOOTH));

            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ImageIO.write(scaledImage, "jpg", baos);
            ByteArrayInputStream fis = new ByteArrayInputStream(baos.toByteArray());

            imagePlacement.getImage().replace(fis);
        }
    }
    
    public static BufferedImage toBufferedImage(java.awt.Image img) {
        if (img instanceof BufferedImage) {
            return (BufferedImage) img;
        }

        // Buat gambar buffered dengan transparansi
        BufferedImage bimage = new BufferedImage(img.getWidth(null), img.getHeight(null), BufferedImage.TYPE_INT_ARGB);

        // Gambar gambar ke gambar buffered
        Graphics2D bGr = bimage.createGraphics();
        bGr.drawImage(img, 0, 0, null);
        bGr.dispose();

        // Kembalikan gambar buffered
        return bimage;
    }
}