Expose the whole player surface area to shaders

[Uklosk]

Hi,

I have written a blur-edges shader for filling the screen empty space while keeping hwdec and gpu-next, but it seems there is no way to expose the black bars area to the shader.

• All shader hooking stages are limited to the video plane.
• There is no documented way of doing this without panning filters that disable hwdec.

Is there a way to do this?

I think both options are plausible, either exposing the presented surface to a new final shader stage or being able to increase the video surface area (maybe this needs support in libplacebo).

With this feature, an automatic script for cropping black bars and blurring the edges at fullscreen should be possible while keeping all the gpu-next features like HDR.

[guidocella]

#16885 added builtin support for background blurring.

[Uklosk]

Thanks, I just tested and it works great out of the box.

I have taken a look at how libplacebo does it:
https://code.videolan.org/videolan/libplacebo/-/blob/master/src/renderer.c?ref_type=heads#L2326

Maybe I should request a new hook to the libplacebo guys that allows running shaders again the whole surface.

[kasper93]

You can run shader and resize output to any size you want. You get video surface on input, and you can extend with blur however you like. You don't need "empty space" on input, only on output.