I've solved my problem by clearing contents of rectangle of video element while
keeping the region available for further drawing.
I'm using QtWebKit port and my code is like this:
void MediaPlayerPrivateXXX::paint(GraphicsContext *context, const IntRect &rect)
{
if (context->paintingDisabled())
return;
if (!m_isVisible)
return;
QPainter* painter = context->platformContext();
QRect qrect = QRect(rect);
if (paused()) {
// draw captured image of paused frame
} else {
painter->save();
painter->setBrush(QBrush(Qt::transparent));
// The next line is the key
painter->setCompositionMode(QPainter::CompositionMode_Clear);
painter->drawRect(qrect);
painter->restore();
}
}
It works equally with or without enabled accelerated compositing.
--
Regards,
Konstantin
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