Deos AMD degrade these chips to d3d10.1 on windows?
Just asking because d3d11 requires 8x msaa ;-).
(But I won't say what I think about this patch...)
Roland
Am 04.01.2018 um 01:54 schrieb Marek Olšák:
> From: Marek Olšák <marek.ol...@amd.com>
>
> i.e. Kabini, Mullins, Stoney.
>
> This was requested internally.
> ---
> src/gallium/drivers/radeonsi/si_state.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/src/gallium/drivers/radeonsi/si_state.c
> b/src/gallium/drivers/radeonsi/si_state.c
> index f88bf29..d52fccd 100644
> --- a/src/gallium/drivers/radeonsi/si_state.c
> +++ b/src/gallium/drivers/radeonsi/si_state.c
> @@ -2136,41 +2136,46 @@ static bool si_is_zs_format_supported(enum
> pipe_format format)
> {
> return si_translate_dbformat(format) != V_028040_Z_INVALID;
> }
>
> static boolean si_is_format_supported(struct pipe_screen *screen,
> enum pipe_format format,
> enum pipe_texture_target target,
> unsigned sample_count,
> unsigned usage)
> {
> + struct si_screen *sscreen = (struct si_screen*)screen;
> unsigned retval = 0;
>
> if (target >= PIPE_MAX_TEXTURE_TYPES) {
> R600_ERR("r600: unsupported texture type %d\n", target);
> return false;
> }
>
> if (!util_format_is_supported(format, usage))
> return false;
>
> if (sample_count > 1) {
> if (!screen->get_param(screen, PIPE_CAP_TEXTURE_MULTISAMPLE))
> return false;
>
> if (usage & PIPE_BIND_SHADER_IMAGE)
> return false;
>
> switch (sample_count) {
> case 2:
> case 4:
> + break;
> case 8:
> + /* Don't expose 8x MSAA on slowest chips. */
> + if (sscreen->info.num_render_backends == 1)
> + return false;
> break;
> case 16:
> if (format == PIPE_FORMAT_NONE)
> return true;
> else
> return false;
> default:
> return false;
> }
> }
>
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