Images disappearing when using translucent OpenGL background

[rkerstens]

Hi there,

I'm working on a little project where I want to display some sort of slideshow on a translucent background. First it was a pain to find out how to get the background of the window translucent, but when I finally did, the images were disappearing as soon as they where opaque. I'm new to the whole Qt/QML thingy and am kinda stuck in solving this.

When I set the opacity of the image to 1, it seems the image is put behind the other objects. When I change the opacity to let's say 0.999999 it appears correctly in the place where I expect it to be.

I set the format using this code
@viewer.setSurfaceType(QSurface::OpenGLSurface);

QSurfaceFormat format;
format.setAlphaBufferSize(8);
format.setRenderableType(QSurfaceFormat::OpenGLES);

viewer.setFormat(format);
viewer.setColor("transparent");
viewer.setClearBeforeRendering(true);@

Does anyone else recognize this problem, and possibly have a solution? :-)

Thanks, Rogier

[chrisadams]

Hi,

I can't remember the bug number now, but ISTR Gunnar mentioning something about this in a bug report. Ask him on #qt-graphics and I'm sure he'll be able to point you to the bug.

Cheers,
Chris.