How to direct grab a window to a gpu texture

Hi.

The QScreen::grabWindow only get a QImage, after all these that I must upload the QImage to a texture(eg, opengl/vulkan texture). In modern operating systems, the content of a window is generally a gpu texture. Using Qt to grab it will first copy the window content from gpu to memory, and then upload it as a gpu texture when using this QImage in QQuickItem or QtOpengl. I think there are many steps in this process that are unnecessary. Can we directly grab the window as a gpu texture and use it?