Adding an opacity gradient to a QVideoPlayer mask

PlotTheSinusoid

Hello,

I am generating a mask from an image file with a background alpha channel and applying it to a QVideoWidget :

QString mask_path = { "mask.png" };
QPixmap mask_map = { mask_path };
videoWidget->setMask(mask_map.mask());

I would like there to be a smooth gradient at the outer edges of the mask, going from invisible to visible gradually.

Is there a way to accomplish this using QLinearGradient or perhaps just by using an image editor? Also I realize I can pass a QRegion to setMask() instead of a QBitmap, but I could not find a way to create a QRegion with an opacity gradient.

Much appreciated.

SGaist

Hi,

Shouldn't you compose a QPixmap with your original image and a QImage containing the gradient you want to achieve ?

PlotTheSinusoid

Hi, I've seen your replies come up quite a lot when googling Qt issues, thanks for this reply and the others.

As for this problem, it seems I was overcomplicating things. After looking at the composition modes example you linked, I realized I could simply superimpose a QLabel widget on a QVideoPlayer to accomplish what I want. It's simple enough to invert the source image's opacity in an exernal editor and add the custom gradients manually.

Cheers!