QQuickImageProvider for a framebuffers

Hello,
We have faced QML restriction related to displaying shared textures from the framebuffers.
Currently, QML is able to display shared textures using QQuickImageProvider class with QQmlImageProviderBase::Texture as type. Unfortunately, QML engine has no mechanism to mark an Image element as dirty in case of texture was updated. Wich will lead to redrawing the QML scene. This functionality will be useful for the FBO attached textures.

I'm suggesting to add additional type for QQmlImageProviderBase::ImageType. For example, VideoTexture which will act as a Texture but will keep the Image element as dirty while it is visible. This will allow forsely redraw QML scene.