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v3dv: handle multisample resolve of integer formats 

The multisample resolve of an integer framebuffer should just take one
of the samples instead of averaging.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>
This commit is contained in:
Iago Toral Quiroga 2020-07-31 14:59:09 +02:00 committed by Marge Bot
parent a4b6845344
commit 049ea81171
1 changed files with 12 additions and 2 deletions
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14
src/broadcom/vulkan/v3dv_meta_copy.c
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@ -3150,16 +3150,26 @@ build_nir_tex_op_ms_resolve(struct nir_builder *b,
sampler->data.descriptor_set = 0;
sampler->data.binding = 0;
const bool is_int = glsl_base_type_is_integer(tex_type);
nir_ssa_def *tmp;
nir_ssa_def *tex_deref = &nir_build_deref_var(b, sampler)->dest.ssa;
for (uint32_t i = 0; i < src_samples; i++) {
nir_ssa_def *s =
build_nir_tex_op_ms_fetch_sample(b, sampler, tex_deref,
tex_type, tex_pos,
nir_imm_int(b, i));
tex_type, tex_pos,
nir_imm_int(b, i));
/* For integer formats, the multisample resolve operation is expected to
* return one of the samples, we just return the first one.
*/
if (is_int)
return s;
tmp = i == 0 ? s : nir_fadd(b, tmp, s);
}
assert(!is_int);
return nir_fmul(b, tmp, nir_imm_float(b, 1.0f / src_samples));
}