Bug 127070 SVG small font is always antialiased
SVG uses glyphs to render fonts, which cause small fonts to be always anti-aliased (making them slightly blurry), and "low quality SVG" (no antialiasing) text to be almost unreadable. As a more minor side-effect this also causes the SVG source to be not very readable and large in size.
chart/org.eclipse.birt.chart.device.svg/src/org/eclipse/birt/chart/device/svg/SVGRendererImpl.java
case ActionType.INVOKE_SCRIPT:
					final StructureSource sructSource = (StructureSource) ie.getSource( );
					String scriptEvent = getJsScriptEvent(tg.getCondition().getValue());
					if (scriptEvent != null){
						String script = ((ScriptValue) tg.getAction().getValue()).getScript();
						String callbackFunction = "callback"+Math.abs(script.hashCode())+"(evt,"+sructSource.getSource().hashCode()+");"; 
						elm.setAttribute(scriptEvent, callbackFunction); 
						setCursor(elm);
						if (!(scripts.contains(script))){
							
							((SVGGraphics2D)_g2d).addScript("function callback"+Math.abs(script.hashCode())+"(evt,source)" +"{"+script+"}"); 
							scripts.add(script);
						}
					}
					break;
										
				}
			}
			hotspotLayer.appendChild( elm );
		}
		
	}
	private String getJsScriptEvent(int condition){
		switch(condition){
		case TriggerCondition.MOUSE_HOVER :
			return "onmouseover"; 
		case TriggerCondition.MOUSE_CLICK :
			return "onclick"; 
		case TriggerCondition.ONCLICK :
			return"onclick";