Hi, I'm trying to draw a high resolution image when device pixel ratio is set
to 2x (to display nicely on a 4K monitor).It works fine if I draw a pixmap
directly on a painter:
int pixelRatio = 2;QPixmap myImage = ...;auto pxm = myImage.scaled(imgDiameter
* pixelRatio, imgDiameter * pixelRatio, Qt::IgnoreAspectRatio,
Qt::SmoothTransformation);pxm.setDevicePixelRatio(pixelRatio);painter->drawPixmap(QPoint(xPos,
yPos), pxm);
However since I need images to be drawn on top of irregular shapes I use the
brush:int pixelRatio = 2;QPixmap myImage = ...;auto oldBrush =
painter->brush();auto pxm = myImage.scaled(imgDiameter * pixelRatio,
imgDiameter * pixelRatio, Qt::IgnoreAspectRatio,
Qt::SmoothTransformation);pxm.setDevicePixelRatio(pixelRatio);QBrush
brush(pxm);painter->setPen(Qt::NoPen);painter->setBrush(brush);painter->setBrushOrigin(xPos,
yPos);painter->drawEllipse(xPos, yPos, imgDiameter,
imgDiameter);painter->setBrush(oldBrush);
When the brush is getting filled it appears that it doesn't adhere to pixmap's
devicePixelRatio, so the pixmap inside the shape is twice as big.
Is there something wrong with what I'm doing?
Thanks,Pavlo
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