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nir: fix setting varying from uniform as flat

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Here we just make sure we match the interpolation type on both
sides of the shader interface. Drivers like d3d12 are expecting
this.

Fixes: 9401990e6f ("nir/linker: set varying from uniform as flat")

Reviewed-by: Qiang Yu <yuq825@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16003>
(cherry picked from commit 4b4bb46af4)
This commit is contained in:
Timothy Arceri 2022-04-18 13:53:21 +10:00 • committed by Dylan Baker
parent 424c960492
commit a27af70c1b
2 changed files with 4 additions and 2 deletions
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2
.pick_status.json
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@ -1291,7 +1291,7 @@
"description": "nir: fix setting varying from uniform as flat",
"nominated": true,
"nomination_type": 1,
"resolution": 0,
"resolution": 1,
"main_sha": null,
"because_sha": "9401990e6f7a4b024b3a62055339f71477b508d0"
},

4
src/compiler/nir/nir_linking_helpers.c
View file

@ -1391,8 +1391,10 @@ nir_link_opt_varyings(nir_shader *producer, nir_shader *consumer)
/* The varying is loaded from same uniform, so no need to do any
* interpolation. Mark it as flat explicitly.
*/
if (in_var && in_var->data.interpolation <= INTERP_MODE_NOPERSPECTIVE)
if (in_var && in_var->data.interpolation <= INTERP_MODE_NOPERSPECTIVE) {
in_var->data.interpolation = INTERP_MODE_FLAT;
out_var->data.interpolation = INTERP_MODE_FLAT;
}
}
}