Using vulkan rendered image with gtkmm

[Pacific00]

Looking to get an image rendered with Vulkan into a Gtk::image. Is this anyway , possible with gtkmm-4 ?

[ebassi (Emmanuele Bassi)]

If by “image rendered with Vulkan” you mean doing some Vulkan rendering, then: no, GTK does not support that.

At most, you have two options:

• download the data as a bytes buffer from Vulkan into a GdkTexture
• create a GL texture object and then use it with GdkGLTexture

[Pacific00]

Was looking use the texture in such a way to avoid the gpu->cpu download. Is there a way, that I can write a custom Vulkan render for a given gtk window/widget? And if so, will it be possible to create a dockable window with vulkan and dock it to another normal gtk window?

[ebassi (Emmanuele Bassi)]

@Pacific00

Is there a way, that I can write a custom Vulkan render for a given gtk window/widget?

No, there is no way to do that. GTK works with multiple rendering API (GL, GLES, Cairo, and optionally Vulkan), using a deferred tree of rendering operations, so you cannot “take over” the rendering in a widget by itself. At most you can render on some offscreen surface/memory buffer, and use the GdkTexture and GtkSnapshot API to let GTK’s rendering pipeline take care of rendering the buffer when needed.

@Pacific00

And if so, will it be possible to create a dockable window with vulkan and dock it to another normal gtk window?

No, there’s no such thing.

[Pacific00]

Thanks a lot for the quick responses.