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nir: add load_frag_coord system value intrinsic

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Some drivers prefer to treat gl_FragCoord as a system value rather than
a fragment shader input, see Const.GLSLFragCoordIsSysVal.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Nicolai Hähnle
2017-07-04 10:34:02 +02:00
parent 5011923e09
commit f1da97ef7a
3 changed files with 6 additions and 0 deletions
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4
src/compiler/nir/nir.c
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@@ -1891,6 +1891,8 @@ nir_intrinsic_from_system_value(gl_system_value val)
return nir_intrinsic_load_base_vertex;
case SYSTEM_VALUE_INVOCATION_ID:
return nir_intrinsic_load_invocation_id;
case SYSTEM_VALUE_FRAG_COORD:
return nir_intrinsic_load_frag_coord;
case SYSTEM_VALUE_FRONT_FACE:
return nir_intrinsic_load_front_face;
case SYSTEM_VALUE_SAMPLE_ID:
@@ -1958,6 +1960,8 @@ nir_system_value_from_intrinsic(nir_intrinsic_op intrin)
return SYSTEM_VALUE_BASE_VERTEX;
case nir_intrinsic_load_invocation_id:
return SYSTEM_VALUE_INVOCATION_ID;
case nir_intrinsic_load_frag_coord:
return SYSTEM_VALUE_FRAG_COORD;
case nir_intrinsic_load_front_face:
return SYSTEM_VALUE_FRONT_FACE;
case nir_intrinsic_load_sample_id: