How to convert SVG to png or jpg

Question

I've tried by using batik. But I'm getting empty png file. I've also included all the required jars.

My code is

import org.apache.batik.transcoder.image.PNGTranscoder;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;

public class TestSVG {
    String filePath="";
    TestSVG(String filePath) throws Exception {
        this.filePath=filePath;
                createImage();
    }


    public void createImage() throws Exception{
        String svg_URI_input = new File("test.svg").toURL().toString();
            TranscoderInput input_svg_image = new TranscoderInput(svg_URI_input);        
            //Step-2: Define OutputStream to PNG Image and attach to TranscoderOutput
            OutputStream png_ostream = new FileOutputStream("chessboard.png");
            TranscoderOutput output_png_image = new TranscoderOutput(png_ostream);              
            // Step-3: Create PNGTranscoder and define hints if required
            PNGTranscoder my_converter = new PNGTranscoder();        
            // Step-4: Convert and Write output
            System.out.println("It will print");
            my_converter.transcode(input_svg_image, output_png_image);
            System.out.println("It will not print");
            png_ostream.flush();
            png_ostream.close();        
    }
}

Please the sysout in the code. Upto step 3 it is working fine.

Answer 1

You have to use transcoding hints. For example for PNG, you should set the pixel that is to be used.

my_converter.addTranscodingHint(PNGTranscoder.KEY_PIXEL_UNIT_TO_MILLIMETER,0.084672F); my_converter.addTranscodingHint(PNGTranscoder.KEY_BACKGROUND_COLOR, Color.WHITE);

Answer 2

With your code, I can able to generate the PNG image,

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;

import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.PNGTranscoder;

public class TestSVG {
    String filePath="";
    TestSVG(String filePath) throws Exception {
       this.filePath=filePath;
            createImage();
    }


    public void createImage() throws Exception{
        String svg_URI_input = new File("asf-logo.svg").toURL().toString();
        TranscoderInput input_svg_image = new TranscoderInput(svg_URI_input);        
        //Step-2: Define OutputStream to PNG Image and attach to TranscoderOutput
        OutputStream png_ostream = new FileOutputStream(filePath);
        TranscoderOutput output_png_image = new TranscoderOutput(png_ostream);              
        // Step-3: Create PNGTranscoder and define hints if required
        PNGTranscoder my_converter = new PNGTranscoder();        
        // Step-4: Convert and Write output
        System.out.println("It will print");
        my_converter.transcode(input_svg_image, output_png_image);
        System.out.println("It will not print");
        png_ostream.flush();
        png_ostream.close();        
}

public static void main(String[] args) throws Exception {
    TestSVG svg = new TestSVG("asf-logo.png");
}
}

Attaching generated png.