[Mesa-dev] [PATCH 30/30] mesa/st: require linear interpolation for ARB_texture_float

[Marek Olšák]

I'd like to keep ARB_texture_float enabled on drivers that don't support
linear interpolation. ARB_texture_float is required by DX9, which doesn't
require linear interpolation. If you pushed this, you would break DX9 games
for r300, which is de-facto reference DX9 hardware.

Marek

On Mon, Nov 19, 2018 at 7:15 AM Erik Faye-Lund <erik.faye-lund at collabora.com>
wrote:

> There's nothing in the ARB_texture_float specification that limits
> filterability for floating-point textures, so we need to ensure that
> this is required to enable this extension. Luckily, we have just the
> right bits ready.
>
> Signed-off-by: Erik Faye-Lund <erik.faye-lund at collabora.com>
> ---
>  src/mesa/state_tracker/st_extensions.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/src/mesa/state_tracker/st_extensions.c
> b/src/mesa/state_tracker/st_extensions.c
> index b0fc824e30c..244934f7588 100644
> --- a/src/mesa/state_tracker/st_extensions.c
> +++ b/src/mesa/state_tracker/st_extensions.c
> @@ -1459,7 +1459,9 @@ void st_init_extensions(struct pipe_screen *screen,
>
>     extensions->ARB_texture_float =
>        extensions->OES_texture_half_float &&
> -      extensions->OES_texture_float;
> +      extensions->OES_texture_half_float_linear &&
> +      extensions->OES_texture_float &&
> +      extensions->OES_texture_float_linear;
>
>     if (extensions->EXT_texture_filter_anisotropic &&
>         screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_ANISOTROPY) >=
> 16.0)
> --
> 2.19.1
>
>
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