Code to scale JFace/SWT image

Please find the code below

      ImageDescriptor scaleImage(Display display, ImageDescriptor imageDescriptor,   
           int outMaxWidth, int outMaxHeight) {  
           if (imageDescriptor == null) {  
                return null;  
           }  
           ImageData imageData = imageDescriptor.getImageData();  
           if (imageData == null) {  
                return imageDescriptor;  
           }  
           int newHeight = outMaxHeight;  
           int newWidth = (imageData.width * newHeight) / imageData.height;  
           if (newWidth > outMaxWidth) {  
                newWidth = outMaxWidth;  
                newHeight = (imageData.height * newWidth) / imageData.width;  
           }  
           // Use GC.drawImage  
           Image outImage = new Image(display, newWidth, newHeight);  
           GC gc = new GC(outImage);  
           Image oldImage = imageDescriptor.createImage();  
           gc.drawImage(oldImage, 0, 0, imageData.width, imageData.height, 0, 0, newWidth, newHeight);  
           ImageDescriptor outImageDesc = ImageDescriptor.createFromImage(outImage);  
           oldImage.dispose();  
           gc.dispose();  
           return outImageDesc;  
      }