Examples of org.apache.batik.transcoder.image.ImageTranscoder

Package org.apache.batik.transcoder.image

Examples of org.apache.batik.transcoder.image.ImageTranscoder

org.apache.batik.transcoder.image.ImageTranscoder
This class enables to transcode an input to an image of any format.
Two transcoding hints (KEY_WIDTH and KEY_HEIGHT) can be used to respectively specify the image width and the image height. If only one of these keys is specified, the transcoder preserves the aspect ratio of the original image.
The KEY_BACKGROUND_COLOR defines the background color to use for opaque image formats, or the background color that may be used for image formats that support alpha channel.
The KEY_AOI represents the area of interest to paint in device space.
Three additional transcoding hints that act on the SVG processor can be specified:
KEY_LANGUAGE to set the default language to use (may be used by a <switch> SVG element for example), KEY_USER_STYLESHEET_URI to fix the URI of a user stylesheet, and KEY_MM_PER_PIXEL to specify the number of millimeters in each pixel . @author Thierry Kormann @version $Id: ImageTranscoder.java,v 1.43 2002/06/05 21:14:48 deweese Exp $

    /**
     * Returns the <tt>ImageTranscoder</tt> the Test should
     * use
     */
    public ImageTranscoder getTestImageTranscoder(){
        ImageTranscoder t = new InternalPNGTranscoder();
        t.addTranscodingHint(PNGTranscoder.KEY_FORCE_TRANSPARENT_WHITE,
                             Boolean.FALSE);
        t.addTranscodingHint(PNGTranscoder.KEY_BACKGROUND_COLOR,
                             new Color(0,0,0,0));
        t.addTranscodingHint(PNGTranscoder.KEY_EXECUTE_ONLOAD,
                             Boolean.TRUE);


        if (validate){
            t.addTranscodingHint(PNGTranscoder.KEY_XML_PARSER_VALIDATING,
                                 Boolean.TRUE);
            t.addTranscodingHint(PNGTranscoder.KEY_XML_PARSER_CLASSNAME,
                                 VALIDATING_PARSER);
        }


        if (userLanguage != null){
            t.addTranscodingHint(PNGTranscoder.KEY_LANGUAGE, 
                                 userLanguage);
        }
        return t;
    }

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                                           SVGRenderingAccuracyTest.TEMP_FILE_SUFFIX);
        
        TranscoderOutput validDst 
            = new TranscoderOutput(new FileOutputStream(tmpFile));
        
        ImageTranscoder transcoder 
            = new PNGTranscoder();
        
        transcoder.transcode(validSrc, validDst);
        
        tmpFile.deleteOnExit();
        
        return tmpFile.toURL();
    }

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    /**
     * Returns the <tt>ImageTranscoder</tt> the Test should
     * use
     */
    public ImageTranscoder getTestImageTranscoder(){
        ImageTranscoder t = super.getTestImageTranscoder();
        t.addTranscodingHint(PNGTranscoder.KEY_ALTERNATE_STYLESHEET,
                             parameter);
        return t;
    }

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    /**
     * Returns the <tt>ImageTranscoder</tt> the Test should
     * use
     */
    public ImageTranscoder getTestImageTranscoder(){
        ImageTranscoder t = super.getTestImageTranscoder();
        t.addTranscodingHint(PNGTranscoder.KEY_MEDIA, parameter);
        return t;
    }

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                        (resources.getString("Message.exportAsPNG"));


                    // create a BufferedImage of the appropriate type
                    int w = buffer.getWidth();
                    int h = buffer.getHeight();
                    final ImageTranscoder trans = new PNGTranscoder();
                    if (application.getXMLParserClassName() != null) {
                        trans.addTranscodingHint
                            (JPEGTranscoder.KEY_XML_PARSER_CLASSNAME,
                                application.getXMLParserClassName());
                    }
                    trans.addTranscodingHint(PNGTranscoder.KEY_FORCE_TRANSPARENT_WHITE,
                                             Boolean.TRUE );


            // Start: By Jun Inamori
            if(isIndexed){
                trans.addTranscodingHint(PNGTranscoder.KEY_INDEXED,new Integer(256));
            }
            // End: By Jun Inamori


                    final BufferedImage img = trans.createImage(w, h);


                    // paint the buffer to the image
                    Graphics2D g2d = img.createGraphics();
                    g2d.drawImage(buffer, null, 0, 0);
                    new Thread() {
                        public void run() {
                            try {
                                currentSavePath = f;
                                OutputStream ostream =
                                    new BufferedOutputStream(new FileOutputStream(f));
                                trans.writeImage(img,
                                                 new TranscoderOutput(ostream));
                                ostream.close();
                            } catch (Exception ex) {}
                            statusBar.setMessage
                                (resources.getString("Message.done"));

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                        (resources.getString("Message.exportAsTIFF"));


                    // create a BufferedImage of the appropriate type
                    int w = buffer.getWidth();
                    int h = buffer.getHeight();
                    final ImageTranscoder trans = new TIFFTranscoder();
                    if (application.getXMLParserClassName() != null) {
                        trans.addTranscodingHint
                            (JPEGTranscoder.KEY_XML_PARSER_CLASSNAME,
                                application.getXMLParserClassName());
                    }
                    final BufferedImage img = trans.createImage(w, h);


                    // paint the buffer to the image
                    Graphics2D g2d = img.createGraphics();
                    g2d.drawImage(buffer, null, 0, 0);
                    new Thread() {
                        public void run() {
                            try {
                                currentSavePath = f;
                                OutputStream ostream = new BufferedOutputStream
                                    (new FileOutputStream(f));
                                trans.writeImage
                                    (img, new TranscoderOutput(ostream));
                                ostream.close();
                            } catch (Exception ex) {}
                            statusBar.setMessage
                                (resources.getString("Message.done"));

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                        (resources.getString("Message.exportAsJPG"));


                    // create a BufferedImage of the appropriate type
                    int w = buffer.getWidth();
                    int h = buffer.getHeight();
                    final ImageTranscoder trans = new JPEGTranscoder();
                    if (application.getXMLParserClassName() != null) {
                        trans.addTranscodingHint
                            (JPEGTranscoder.KEY_XML_PARSER_CLASSNAME,
                                application.getXMLParserClassName());
                    }
                    trans.addTranscodingHint
                        (JPEGTranscoder.KEY_QUALITY, new Float(quality));


                    final BufferedImage img = trans.createImage(w, h);


                    // paint the buffer to the image
                    Graphics2D g2d = img.createGraphics();
                    g2d.setColor(Color.white);
                    g2d.fillRect(0, 0, w, h);
                    g2d.drawImage(buffer, null, 0, 0);
                    new Thread() {
                        public void run() {
                            try {
                                currentSavePath = f;
                                OutputStream ostream =
                                    new BufferedOutputStream(new FileOutputStream(f));
                                trans.writeImage(img, new TranscoderOutput(ostream));
                                ostream.close();
                            } catch (Exception ex) { }
                            statusBar.setMessage
                                (resources.getString("Message.done"));
                        }

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                                           SVGRenderingAccuracyTest.TEMP_FILE_SUFFIX);
        
        TranscoderOutput validDst 
            = new TranscoderOutput(new FileOutputStream(tmpFile));
        
        ImageTranscoder transcoder 
            = new PNGTranscoder();
        
        transcoder.transcode(validSrc, validDst);
        
        tmpFile.deleteOnExit();
        
        return tmpFile.toURL();
    }

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        try {


            TranscoderInput input = new TranscoderInput(dom);


            ImageTranscoder t = new ImageTranscoder() {


                @Override
                public BufferedImage createImage(int w, int h) {
                    return new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
                }


                @Override
                public void writeImage(BufferedImage image, TranscoderOutput out)
                        throws TranscoderException {
                    int wd = image.getWidth() / 2;
                    int ht = image.getHeight() / 2;
                    BufferedImage resizedImage = new BufferedImage(wd, ht, BufferedImage.TYPE_INT_ARGB);
                    Graphics2D g = resizedImage.createGraphics();
                    g.setComposite(AlphaComposite.Src);
                    g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
                    g.setRenderingHint(RenderingHints.KEY_RENDERING,RenderingHints.VALUE_RENDER_QUALITY);
                    g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
                    g.drawImage(image, 0, 0, wd, ht, null);
                    g.dispose();
                    imagePointer[0] = resizedImage;
                }
              };
            t.setTranscodingHints(transcoderHints);
            t.transcode(input, null);
        }
        catch (TranscoderException ex) {
            // Requires Java 6
            ex.printStackTrace();
            throw new IOException("Couldn't convert SVG");

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  }


  private static byte[] getRasterImageByteArray(final Document document, final int width, final ImageFormat imageFormat)
  {
    // Create a image transcoder
    final ImageTranscoder t;
    if (imageFormat == ImageFormat.JPEG) {
      t = new JPEGTranscoder();
      t.addTranscodingHint(JPEGTranscoder.KEY_QUALITY, new Float(.8));
      t.addTranscodingHint(JPEGTranscoder.KEY_WIDTH, new Float(width));
      // } else if (imageFormat == ImageFormat.TIFF) {
      // t = new TIFFTranscoder();
      // t.addTranscodingHint(TIFFTranscoder.KEY_WIDTH, new Float(width));
    } else {
      t = new PNGTranscoder();
      t.addTranscodingHint(PNGTranscoder.KEY_WIDTH, new Float(width));
    }
    // Set the transcoding hints.
    TranscoderInput input = new TranscoderInput(document);
    final ByteArrayOutputStream baos = new ByteArrayOutputStream();
    final TranscoderOutput output = new TranscoderOutput(baos);
    // Save the image.
    try {
      t.transcode(input, output);
    } catch (TranscoderException ex) {
      log.fatal("Exception encountered " + ex, ex);
    }
    return baos.toByteArray();
  }

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