QBitmap bitmap(800, 400);
   QPainter painter(&bitmap);
   painter.setRenderHint(QPainter::TextAntialiasing, true);
   painter.setRenderHint(QPainter::Antialiasing, true);
   painter.setPen(Qt::white);
   for (int i = 0; i < 800; ++i) {
       for (int j = 0; j < 400; ++j) {
           painter.drawPoint(QPoint(i, j));
       }
   }
   painter.setPen(QPen(Qt::black));
   QFont font("Arial", 46);
   font.setBold(true);
   font.setItalic(true);
   painter.setFont(font);
   painter.drawText(QRect(100, 100, 400, 200),
                    Qt::AlignRight | Qt::AlignBottom, "The Text 34 Arial");
   bitmap.save("D:\\test.bmp", "BMP");