| <test title="LookupOp Testing"> |
| <description> |
| This test validates the convertion of Java 2D LookupOp |
| into an SVG filter. |
| </description> |
| <description> |
| It uses a simple inverter lookup. |
| </description> |
| <javaCode> |
| <![CDATA[ |
| g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, |
| RenderingHints.VALUE_ANTIALIAS_ON); |
| |
| AffineTransform defaultTransform = g.getTransform(); |
| |
| // |
| // Load Image |
| // |
| Image image = Toolkit.getDefaultToolkit().createImage("/work/doc/svg/src/usecases/html/images/vangogh.jpg"); |
| MediaTracker tracker = new MediaTracker(new Button("")); |
| tracker.addImage(image, 0); |
| try{ |
| tracker.waitForAll(); |
| }catch(InterruptedException e){ |
| tracker.removeImage(image); |
| image = null; |
| }finally { |
| if(image != null) |
| tracker.removeImage(image); |
| if(tracker.isErrorAny()) |
| image = null; |
| if(image != null){ |
| if(image.getWidth(null)<0 || |
| image.getHeight(null)<0) |
| image = null; |
| } |
| } |
| |
| if(image == null){ |
| throw new Error("Could not load image"); |
| } |
| |
| BufferedImage bi = new BufferedImage(image.getWidth(null), |
| image.getHeight(null), BufferedImage.TYPE_INT_RGB); |
| Graphics2D ig = bi.createGraphics(); |
| ig.drawImage(image, 0, 0, null); |
| |
| byte lookup[] = new byte[256]; |
| for(int i=0; i<256; i++) |
| lookup[i] = (byte)(255 - i); |
| |
| LookupTable table = new ByteLookupTable(0, lookup); |
| LookupOp inverter = new LookupOp(table, null); |
| |
| // Simply paint the image without and with the lookup filter |
| g.setPaint(Color.black); |
| g.drawString("Normal / Inverted", 10, 20); |
| g.drawImage(image, 10, 30, null); |
| g.drawImage(bi, inverter, 10 + bi.getWidth() + 10, 30); |
| |
| ]]> |
| </javaCode> |
| </test> |