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 $

            report.setPassed(false);
            tmpFile.deleteOnExit();
            return report;
        }


        ImageTranscoder transcoder = getTestImageTranscoder();
        TranscoderInput src = new TranscoderInput(svgURL.toString());
        TranscoderOutput dst = new TranscoderOutput(tmpFileOS);
        
        try{
            transcoder.transcode(src, dst);
        }catch(TranscoderException e){
            StringWriter trace = new StringWriter();
            e.printStackTrace(new PrintWriter(trace));
                
            report.setErrorCode(ERROR_CANNOT_TRANSCODE_SVG);

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


                    // create a BufferedImage of the appropriate type
                    int w = buffer.getWidth();
                    int h = buffer.getHeight();
                    final ImageTranscoder trans = new PNGTranscoder();
                    trans.addTranscodingHint(PNGTranscoder.KEY_XML_PARSER_CLASSNAME,
                                             application.getXMLParserClassName());
                    trans.addTranscodingHint(PNGTranscoder.KEY_FORCE_TRANSPARENT_WHITE,
                                             new Boolean(true));
                    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 {
                                currentExportPath = f;
                                OutputStream ostream =
                                    new BufferedOutputStream(new FileOutputStream(f));
                                trans.writeImage(img,
                                                 new TranscoderOutput(ostream));
                                ostream.flush();
                            } 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();
                    trans.addTranscodingHint
                        (TIFFTranscoder.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 {
                                currentExportPath = f;
                                OutputStream ostream = new BufferedOutputStream
                                    (new FileOutputStream(f));
                                trans.writeImage
                                    (img, new TranscoderOutput(ostream));
                                ostream.flush();
                            } catch (Exception ex) {}
                            statusBar.setMessage
                                (resources.getString("Message.done"));

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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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        // ImageInputStream in a class that extends InputStream.
        ImageInputStreamAdaptor imageInputStreamAdaptor =
            new ImageInputStreamAdaptor(inputStream);


        // create a servlet
        ImageTranscoder bufferedImgTranscoder =
            new BufferedImageTranscoder();


        TranscoderInput transcoderInput =
            new TranscoderInput(imageInputStreamAdaptor);


        // create the servlet output
        BufferedImageTranscoderOutput output =
            new BufferedImageTranscoderOutput();


        // perform the transcoding
        try {
            bufferedImgTranscoder.transcode(transcoderInput, output);
        } catch (TranscoderException e) {
            String imagePath = transcoderInput.getURI();
            logger.error("svg-transcoding-error", imagePath, e);
            throw new IOException(e.getLocalizedMessage());
        }

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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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    public TestReport encode(URL srcURL, FileOutputStream fos) {
        DefaultTestReport report = new DefaultTestReport(this);
        try{
            ImageTranscoder transcoder = getTestImageTranscoder();
            TranscoderInput src = new TranscoderInput(svgURL.toString());
            TranscoderOutput dst = new TranscoderOutput(fos);
            transcoder.transcode(src, dst);
            return null;
        }catch(TranscoderException e){
            StringWriter trace = new StringWriter();
            e.printStackTrace(new PrintWriter(trace));

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    /**
     * 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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    /**
     * 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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