[Qt-interest] QImage mirror crash

Benjamin ikipou at gmail.com
Tue Dec 9 09:11:48 CET 2008


On Linux I have no problem with mirrored. Seeing your code should help
to find the problem.

2008/12/9 Richard Baron Penman <richardbp+qt at gmail.com>:
> hello,
>
> I want to flip a QImage and until now have been using the following method:
>
>>    QRect rectDisplay(0, 0, m_displayWidth, m_displayHeight);
>>    painter.scale(1, -1);
>>    painter.translate(0, -rectDisplay.height());
>>    painter.drawImage(rectDisplay, m_Image);
>
> This has worked fine. I noticed that QImage has a mirrored() function
> that should achieve the same effect with arguments of (true, false). I
> would like to clean up my code and use this instead, but when I try it
> my program crashes.
> Are there known problems with QImage::mirrored()?
>
> FYI: Qt 4.4.2, XP SP2
>
> Richard
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