Question

我有一个名为Order的类，它包含一个指向另一个名为PrescriptionImage的类的指针数组。我想查询所有这些图像并为它们添加水印。之后我需要保存这些图像（基本上更新它们）。

我无法找到为图像添加水印的方法，并且对通过云代码处理图像感到困惑。很多教程都将它用于javascript并使用html代码。

Parse.Cloud.define("stampPrescription", function(request, response){
  // String that contains the current date
  var today = new Date();
  var dd = today.getDate();
  var mm = today.getMonth()+1;
  var yyyy = today.getFullYear();
  var dateAsString = dd+"-"+mm+"-"+yyyy;

  // object id for the Order object being called
  var orderObjectId = request.params.orderObjectId;
  var address = request.params.address;

  var order = Parse.Object.extend("Order");
  var queryForOrder = new Parse.Query(order);
  queryForOrder.include("Prescriptionimage");
  queryForOrder.get(orderObjectId , {

    success: function(results){
      console.log("value found is "+results.id);
      var rxImages = results.get("prescriptionImageArray");

      for (var i = 0; i < rxImages.length; i++) {
        var imageFile = rxImages[i];

        // I retrive the images and store in a variable 
        // TODO: Need help with below line
        // place watermark with dateAsString and address at bottom of the image
      }


    response.success("done";
    },  //Ends block for successfuly query
    error: function(e){
      console.log("Error in query "+e.message);
      respone.error("Error in query "+e.message);

    }

  });  // Ends queryForOrder block

}); //Ends the function

我的主要问题是，我通过在android中使用paint1在android手机（客户端）的图像上放置水印。我现在想将此代码转移到服务器端，即解析云代码以提高效率和速度。有人可以帮我解决这个问题吗？目前下面是我在android中用来修改位图的代码。

public Bitmap mark(Bitmap src, int alpha, int size, boolean underline) {
        int w = src.getWidth();
        int h = src.getHeight();
        Bitmap result = Bitmap.createBitmap(w, h, src.getConfig());
        Canvas canvas = new Canvas(result);
        canvas.drawBitmap(src, 0, 0, null);
        Paint paint = new Paint();
        paint.setColor(Color.parseColor("#551A8B"));
        paint.setAlpha(alpha);
        paint.setTextSize(size);
        paint.setAntiAlias(true);
        paint.setUnderlineText(underline);
        final Calendar c = Calendar.getInstance();
        SimpleDateFormat time = new SimpleDateFormat("HH:mm:ss");
        SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy");
        String currentTime = time.format(c.getTime());
        String currentDate = dateFormat.format(c.getTime());

        canvas.drawText(name, w / 2, 3 * h / 4 - 15, paint);
        canvas.drawText(currentTime, w / 2, 3 * h / 4 + 5, paint);
        canvas.drawText(currentDate, w / 2, 3 * h / 4 + 25, paint);
        canvas.drawText(chemistAddress1, w / 2, 3 * h / 4 + 45, paint);       
        return result;
    }

如果我需要标记多个图像然后上传，则会显着减慢进程并占用更多内存。我不想冒OOM例外的风险，所以想把上面的过程转移到云代码上，但是我找不到上面那个可以在解析云代码上运行的等价物。

使用Parse.com中的云代码为图像添加水印

0 个答案: