How to save text antialiasing on QImage?

RazrFalcon

If I draw text on QImage and then show it via QPainter on QWidget I get bad antialiasing compared to direct text drawing via QPainter.

Here is simple code example:
@#include <QApplication>
#include <QtGui>

class Widget : public QWidget
{
Q_OBJECT

public:
Widget(QWidget *parent = 0) : QWidget(parent)
{
m_img = QImage(QSize(200, 50), QImage::Format_ARGB32_Premultiplied);
QPainter p(&m_img);
p.setRenderHint(QPainter::Antialiasing);
p.setRenderHint(QPainter::TextAntialiasing);
p.fillRect(m_img.rect(), palette().color(QPalette::Active, QPalette::Window));
p.setPen(palette().color(QPalette::Active, QPalette::Text));
p.drawText(m_img.rect(), Qt::AlignCenter, "My Text 11~!");

    setFixedSize(200, 100);
}
void paintEvent(QPaintEvent *)
{
    QPainter p(this);
    p.fillRect(rect(), palette().color(QPalette::Active, QPalette::Window));
    p.drawImage(0, 0, m_img);
    p.fillRect(0, 50, 200, 1, Qt::red);
    p.drawText(QRect(0, 50, 200, 50), Qt::AlignCenter, "My Text 11~!");
}

private:
QImage m_img;
};

#include "main.moc"

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Widget w;
w.show();
return a.exec();
}@

Linux, KDE, Font: Verdana 11, Slight hinting, RGB subpixel rendering.

Example (orig):
!http://storage5.static.itmages.ru/i/14/0826/h_1409044667_3101927_6e9b0dfa23.png(100%)!
Example (800% scale):
!http://storage6.static.itmages.ru/i/14/0826/h_1409044714_6935247_ccc2136ebf.png(800%)!