Cropping Computation

var f=scope.cropDetails.image.width / scope.cropDetails.canvas.width;
          var ratio = 1/f;

          console.log("cropped image f: " + f);
          console.log("cropped image ratio: " + ratio);

          var vx = scope.cropDetails.x - scope.cropDetails.size / 2;
          var vy = scope.cropDetails.y - scope.cropDetails.size / 2;
          var vw = scope.cropDetails.size;
          var vh = scope.cropDetails.size;

          var options = scope.cropDetails;
          options.fsRef = scope.profilephoto.fsRef;
          options.width = vw * f;
          options.height = vh * f;
          options.x = vx * f;
          options.y = vy * f;

          console.log("cropped image fsRef: " + scope.profilephoto.fsRef);
          console.log("cropped image width: " + options.width);
          console.log("cropped image height: " + options.height);
          console.log("cropped image position x: " + options.x);
          console.log("cropped image position y: " + options.y);

          if (options.x < 0)
            options.x = 0;
          if (options.y < 0)
            options.y = 0;

          console.log("new crop details options " + JSON.stringify(options));
          console.log("call to crop profile photo api...");