[Mesa-dev] SSBO's in UniformBlocks list?

[Ilia Mirkin]

On Thu, Oct 1, 2015 at 2:12 AM, Iago Toral <itoral at igalia.com> wrote:
> However, I think this can be a problem in your case, because you can't
> remap the block index if you don't know how many blocks in UniformBlocks
> before the one you are processing are of a different type (i.e. UBOs if
> this is an SSBO or the other way around). And you cannot know how many
> blocks you have to count because the index into the array instance
> blocks is not constant... We can probably fix this by grouping UBOs and
> SSBOS together in the array right before we flow into the backends.

Slightly annoying but non-fatal. I think that just the remapping table
is enough -- the indexing is always done relative to a base index, and
as long as these arrays are contiguous (which they kinda have to be),
it shouldn't matter what the offset is. i.e. if the list contains u0
u1 s0 s1 u2 u3, and i want to index on u2/3, as long as i know that u2
is the base, I can use its index.

At least I think that's right, haven't *fully* thought it through tbh.
But it seems like it could work.

  -ilia