[Bug 97305] Wrong values returned by GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT & GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT randomly breaks stuff

https://bugs.freedesktop.org/show_bug.cgi?id=97305

--- Comment #10 from Marek Olšák maraeo@gmail.com --- (In reply to Ilia Mirkin from comment #9)

(In reply to Marek Olšák from comment #5)

...

Pre-GCN cards require an alignment of 256 bytes for uniform buffers. GCN cards only require 4 byte alignment there.

All other buffer binding points require 1, 2, or 4 bytes depending on the texel size. It's really min(texel_size, 4).

That means that you have to return max(texel_size) for the GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT. You only get one cap, and a texture buffer can be any offset.

That's what we already do.