[Mesa-dev] [PATCH] mesa: rename MESA format names to have the same names as PIPE formats

[Marek Olšák]

On Sat, Jan 11, 2014 at 4:19 AM, Mark Mueller <markkmueller at gmail.com> wrote:
> The predominant feedback on this adventure has been to make the MESA_FORMATs
> match the PIPE, or gallium formats but every journey I've made down that
> path has been fraught with peril. There are some cases where PIPE_FORMATs
> are even more confusing then MESA_FORMATs*. Either there is something that I
> am missing, or there are things about the PIPE_FORMATS that people aren't
> aware of, so let me pull out some specific references.
>
> The first problem is that in PIPE_FORMATS there is no distinction between
> array and packed formats, and this has proven to be a big cause for format
> ambiguity that some are wanting to see addressed. One proposed solution is
> to represent array formats like (hypothetically): R8G8B8A8; and packed
> formats as RGBA_8888 (or vice versa) in the MESA_FORMATs and subsequently
> modifying the PIPE_FORMATs to suit. But that makes RGBA_1010102 kinda messy
> (though it could be RGBA_aaa2). So then how to handle this:
>
> So how about a poll! Isn't that the rage these days?
>
>
> Please vote on:
>
>
> 1) Should MESA_FORMAT names clearly distinguish between array and packed
> formats, yes or no?

Yes.

> 2) What is your preference for array format naming convention:
>
>     a) RGBA8888_UNORM
>
>     b) R8G8B8A8_UNORM
>
>     c) RGBA_UNORM8

B or C. C is cleaner, B is used by gallium. I'll leave that decision to you.

> 3) What is your preference for packed format naming convention:
>
>    a) RGBA5551_UNORM
>
>    b) R5G5B5A1_UNORM

if the final answer to (2) is C, then B. Otherwise A. B is more
readable for formats like Z24S8 as opposed to ZS248.

> 4) What is your preference for naming packed formats with 10 or more bits:
>
>    a) RGBA1010102_UNORM
>
>    b) R10G10B10A2_UNORM
>
>    c) RGBAaaa2_UNORM
>
>    d) Croque-monsieur

Same as (3).

Marek