Re: GL framebuffer fetch behavior

AMD lowers it to an image load, which follows the rules for image views, so
(x, 0, 0, 1) for R8_UNORM.

Marek

On Wed, Apr 23, 2025 at 12:25 PM Mike Blumenkrantz <
[email protected]> wrote:

> Hi,
>
> An issue recently came up in the GL working group: what is the robustness
> behavior of framebuffer fetch? For example, if a framebuffer attachment
> format is R8_UNORM, what are the YZW components which get read back?
>
> If people from all the drivers (besides panfrost) which support this
> extension could reply with the expected behavior on their hardware, that
> would be helpful.
>
>
> Thanks,
> Mike
>