diff options
| author | Dave Airlie <airlied@redhat.com> | 2020-07-20 15:41:27 +1000 |
|---|---|---|
| committer | Marge Bot <eric+marge@anholt.net> | 2021-10-06 04:35:25 +0000 |
| commit | 29f4931b520f71b27d65a5df70503d6dfc622aed (patch) | |
| tree | c1bb616d66e20bf1355900b668ac2f6570b0b48e | |
| parent | 22a332f5acee1c8897fec905407097190c7235a2 (diff) | |
llvmpipe: fix 4-bit output scaling.
This is overkill, but hey 4-bits per channel is hardly something to
care about.
(Suggestions welcome for a better version).
Fixes:
dEQP-GLES2.functional.fbo.render.*rgba4*
Reviewed-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12001>
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_state_fs.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_state_fs.c b/src/gallium/drivers/llvmpipe/lp_state_fs.c index c77f0f38df8..80dd95f01e9 100644 --- a/src/gallium/drivers/llvmpipe/lp_state_fs.c +++ b/src/gallium/drivers/llvmpipe/lp_state_fs.c @@ -1712,6 +1712,15 @@ scale_bits(struct gallivm_state *gallivm, int delta_bits = src_bits - dst_bits; if (delta_bits <= dst_bits) { + + if (dst_bits == 4) { + struct lp_type flt_type = lp_type_float_vec(32, src_type.length * 32); + + result = lp_build_unsigned_norm_to_float(gallivm, src_bits, flt_type, src); + result = lp_build_clamped_float_to_unsigned_norm(gallivm, flt_type, dst_bits, result); + return result; + } + /* * Approximate the rescaling with a single shift. * |