Custom Magento JCrop (JQuery) extension for front-end product main image

Custom Magento JCrop (JQuery) extension for front-end product main image. This extension should provide the web visitor de ability to enter height and width in text fields in the product detail page as attributes, once the web visitor enters this values the cropping should be activated in the product main image zone. Then the web visitor should be able to move the crop around in the main image to select the area and also the visitor should be able to resize the crop graphically. Once the web visitor adds the product to cart, the cropped zone should be saved as jpg and should be attached to the cart so when the users is sent to the cart he/she will be able to see the cropped image and to the order/invoice/shipment so when the order/invoice/shipment is checked from the admin, the cropped image would be visible and also should be visible when exported to order/invoice/shipment pdf.