I tried to load an image from this Latex to image website

http://mathtran.org/cgi-bin/mathtran?D=3;tex=1%2B2

to get an PNG image of 1+2. However, what I get is just the image of the number 1.

Here is my code
Qt Code: 
  1. void FTransUI::fetchDone(QNetworkReply* reply) {
  2.   QImage image;
  3.   if (reply->error() == QNetworkReply::NoError) {
  4.     cout << "bytes = " << reply->bytesAvailable() << endl;  // 
  5.     image.load(reply, 0);
  6.     cout << "After load bytes = " << reply->bytesAvailable() << endl;
  7.     cout << "Image = " << image.width() << " x " << image.height() << endl;
  8.     if (!image.isNull()) {
  9.       QPixmap pixmap = QPixmap::fromImage(image);
  10.       imgLabel->setPixmap(pixmap);
  11.     }
  12.     else
  13.       QMessageBox::information(this, "Error", tr("NULL IMG"));
  14.   }
  15.   else {
  16.     QMessageBox::information(this, "Error", tr("Cannot access"));
  17.   }
  18.   reply->deleteLater();
  19.   //delete reply;
  20. }
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Previous to image.load, bytesAvailable = 366
After load, bytesAvailable = 0 (which is normal after reading all data of an image)
However, the size of the image is 10 x 15 (the width is wrong, it should be bigger than 10 for image of 1+2).
I have no problem like this when I use QHttp (which is now obsolete).
Thanks for your help.