I have a strange behaviour of drawText function when runs in different computers.

I have used a QPainter for showing an image and draw text over a surface. The draw text works correctly on pc where I developed. When I tried to move the project to another computer the draw text function draws text in a plane rotated of 180° and moreover the string drawn is rotated too. Do you know why?
I mean if in a pc the string is traslated toward botton, in the other the same translation move toward top, and the string is drawn in reverse mode. The image is drawn correctly.

On one pc I have used msvc2010 in the other mingw.