Comment 1 janine chang 2013-07-23 02:05:43 EDT

Created attachment 233687 [details]
JFreeChart to SVG to Birt

Comment 2 janine chang 2013-07-23 02:06:09 EDT

Created attachment 233688 [details]
JFreeChart directly to Birt

Comment 3 janine chang 2013-07-23 02:15:40 EDT

I did my own "patch" to org.eclipse.birt.report.engine.emitter.pdf.PDFPage

I modify the following method:

protected void drawImage( String imageId, byte[] imageData,
			String extension, float imageX, float imageY, float height,float width, String helpText, Map params ) throws Exception



		if ( SvgFile.isSvg( null, null, extension ) )
		{
//start add JFreeChart
			if(null == imageData)
				return;
			JFreeChart[] charts = null;
			try {
				ObjectInputStream obj =new ObjectInputStream(new ByteArrayInputStream(imageData));
				charts = (JFreeChart[])obj.readObject();
			} catch (Exception e) {
				// TODO Auto-generated catch block
				System.out.println("not jfreechart");
			}
			
			if(charts!=null){
				template = contentByte.createTemplate(width*2, height*2);
	    		Image img = genJfreechartImage(template, charts, width, height);
	    		if(img!=null)
	    			drawImage( img, imageX, imageY, height, width, helpText );
				return;
//end add JFreeChart
			}else{
				template = generateTemplateFromSVG( null, imageData, imageX,
					imageY, height, width, helpText );
			}
		}

Comment 4 janine chang 2013-07-23 02:17:35 EDT

and add my genJfreechartImage:

	//add genJfreechartImage
		private Image genJfreechartImage(PdfTemplate tp, JFreeChart[] charts, float width, float height)throws BadElementException, DocumentException{
	        Graphics2D g2d = tp.createGraphics(width*2, height*2, true, 0);
	        for(int i=0;i<charts.length;i++){
	        	Rectangle2D r2d = new Rectangle2D.Double(i*width*2/charts.length, 0, width*2/charts.length, height*2);
	        	charts[i].draw(g2d, r2d, null);
	        }
	        Image img = Image.getInstance(tp);
	        g2d.dispose();
	        g2d = null;
	        return img;
	    }

Comment 5 janine chang 2013-07-23 02:22:50 EDT

To use the "patch", need to do:
1: serialize the JFreeChart[] to byte[]
2: setMimeType("image/svg+xml") to the image in report design
In this way, the vector image is always clear after zoom in and the file size will be much smaller than convert to PNG/SVG

Comment 6 janine chang 2013-07-23 02:24:13 EDT

If this patch is acceptable, could you add it to the future birt updates?