Archive 17/01/2023.

Can single Urho App target multiple Surfaces?

najak3d

We want to set up a new scene for a pop-up form, which needs to render it’s own scene, separate from the main form. What is the best way to go about this?

Currently, we are considering creating a whole new Urho Application to do this, but I’m not a fan of having multiple “Contexts” for graphics resources/etc. Is there a way to use the same Urho App (and Resources/Context) to render to multiple Surfaces? (in Windows, I’m talking about multiple Windows Controls)

Modanung

Maybe QUrho can help?

Eugene

I know that ImGUI backend in rbfx can somehow render multiple “surfaces” (i.e. multiple system windows) on Desktop platforms.
Therefore, it should be possible to do with some tweaking on C++ side.
I admit that I have no clue what exactly has to be done.

Modanung

If you render to texture you can draw it wherever you like.

static QPixmap toPixmap(Image* image) {
     return QPixmap::fromImage(QImage{
                   image->GetData(),
                   image->GetWidth(),
                   image->GetHeight(),
                   QImage::Format_RGBA8888 });
}

najak3d

Modanung - RTT might be what we end up doing, to keep this lightweight. Thanks for the suggestion and code example.