[Mesa-dev] [PATCH v2] r600g: Implement BPTC texture support

[Marek Olšák]

Reviewed-by: Marek Olšák <marek.olsak at amd.com>

Marek

On Sat, Jul 26, 2014 at 4:36 PM, Glenn Kennard <glenn.kennard at gmail.com> wrote:
> Signed-off-by: Glenn Kennard <glenn.kennard at gmail.com>
> ---
> This patch depends on Ilia Mirkin's "nvc0: add BPTC format support"
> and Neil Robert's core BPTC support patches.
>
> Changes since patch v1:
> Remove srgb flag from float formats.
> Set RGB sign bits for BPTC_RGB_FLOAT.
>
> This passes piglit, including newly written test for
> float variants which will be sent to piglit mailing list
> separately.
>
>  src/gallium/drivers/r600/r600_state_common.c | 24 ++++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
>
> diff --git a/src/gallium/drivers/r600/r600_state_common.c b/src/gallium/drivers/r600/r600_state_common.c
> index 8c37d0d..98a2382 100644
> --- a/src/gallium/drivers/r600/r600_state_common.c
> +++ b/src/gallium/drivers/r600/r600_state_common.c
> @@ -1967,6 +1967,30 @@ uint32_t r600_translate_texformat(struct pipe_screen *screen,
>                 }
>         }
>
> +       if (desc->layout == UTIL_FORMAT_LAYOUT_BPTC) {
> +               if (!enable_s3tc)
> +                       goto out_unknown;
> +
> +               if (rscreen->b.chip_class < EVERGREEN)
> +                       goto out_unknown;
> +
> +               switch (format) {
> +                       case PIPE_FORMAT_BPTC_RGBA_UNORM:
> +                       case PIPE_FORMAT_BPTC_SRGBA_UNORM:
> +                               result = FMT_BC7;
> +                               is_srgb_valid = TRUE;
> +                               goto out_word4;
> +                       case PIPE_FORMAT_BPTC_RGB_FLOAT:
> +                               word4 |= sign_bit[0] | sign_bit[1] | sign_bit[2];
> +                               /* fall through */
> +                       case PIPE_FORMAT_BPTC_RGB_UFLOAT:
> +                               result = FMT_BC6;
> +                               goto out_word4;
> +                       default:
> +                               goto out_unknown;
> +               }
> +       }
> +
>         if (desc->layout == UTIL_FORMAT_LAYOUT_SUBSAMPLED) {
>                 switch (format) {
>                 case PIPE_FORMAT_R8G8_B8G8_UNORM:
> --
> 1.8.3.2
>
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