I'm looking into possible frameworks to renew a win32 application, consisting of a rather simple UI plus directx 9/11 rendering, as sketched here. It is sufficient to just have the rendering displayed, input events can be dispatched using the HTML5 app.

By prototyping this with WebView2 I now realized that it is not possible to have a transparent WebView2, so the initial idea of using a layered approach doesn't seem to work. Looking at microsoft/microsoft-ui-xaml#2992 it seems that this is not coming for WebView2 in the near future.

An alternative would be to do this compositing using WebGL and a shared d3d11 texture (updated from main process and the blitted by WebView2 WebGL)...but also for this it seems that there is no API or extension point that would allow this.

Are there alternatives that I'm not aware of ?

Thx