[Qt-interest] How to draw a X11 Pixmap?

[Dong Tiger]

Hi all,

In my program, I have to create an X11 Pixmap, pass it to a component which
draws on the pixmap, and then I draw the pixmap on a QPaintDevice.
I have no much experience on X11 programming. My not-working code looks
like:

Pixmap pixmap = XCreatePixmap(QX11Info::display(),
QX11Info::appRootWindow(), width, height, 24);
// theComponent->doSomthingWithPixmap(pixmap);
QPixmap qpixmap = QPixmap::fromX11Pixmap(pixmap,
QPixmap::ExplicitlyShared);   // X error here
qainter->drawPixmap(0, 0, qpixmap);

The program receives an X error at the line converting Pixmap to QPixmap.
The detailed error message is "BadMatch (invalid parameter attributes)".
Change depth from 24 to 32 has no effect.

Do you know what's wrong with my code? TIA.

--
Tiger
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