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mesa/st: always use DXT5 when transcoding ASTC format

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This fixes artifacts seen in games when using ASTC transcoding,
we need to use DXT5 for proper alpha channel support.

Number of components is a block specific property, there is no easy
way to see if we will require >1bit alpha support or not, so simply
use DXT5 to have support in place.

Fixes: 91cbe8d855 ("gallium: Add a transcode_astc driconf option")
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15029>
This commit is contained in:
Tapani Pälli 2022-02-15 10:22:15 +02:00 • committed by Marge Bot
parent 103699677b
commit d3b4202b63
1 changed files with 4 additions and 15 deletions
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19
src/mesa/state_tracker/st_format.c
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@ -110,23 +110,12 @@ st_mesa_format_to_pipe_format(const struct st_context *st,
}
if (st_astc_format_fallback(st, mesaFormat)) {
const struct util_format_description *desc =
util_format_description(mesaFormat);
if (_mesa_is_format_srgb(mesaFormat)) {
if (!st->transcode_astc)
return PIPE_FORMAT_R8G8B8A8_SRGB;
else if (desc->block.width * desc->block.height < 32)
return PIPE_FORMAT_DXT5_SRGBA;
else
return PIPE_FORMAT_DXT1_SRGBA;
return st->transcode_astc ? PIPE_FORMAT_DXT5_SRGBA :
PIPE_FORMAT_R8G8B8A8_SRGB;
} else {
if (!st->transcode_astc)
return PIPE_FORMAT_R8G8B8A8_UNORM;
else if (desc->block.width * desc->block.height < 32)
return PIPE_FORMAT_DXT5_RGBA;
else
return PIPE_FORMAT_DXT1_RGBA;
return st->transcode_astc ? PIPE_FORMAT_DXT5_RGBA :
PIPE_FORMAT_R8G8B8A8_UNORM;
}
}