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microsoft/compiler: For Vulkan, when shading at sample rate, pos is sample pos

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Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20400>
This commit is contained in:
Jesse Natalie
2022-12-19 14:25:44 -08:00
committed by Marge Bot
parent b0f3a387c9
commit d3cae18cb5
1 changed files with 14 additions and 0 deletions
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14
src/microsoft/compiler/nir_to_dxil.c
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@@ -5730,6 +5730,20 @@ emit_module(struct ntd_context *ctx, const struct nir_to_dxil_options *opts)
} }
} }
/* From the Vulkan spec 1.3.238, section 15.8:
* When Sample Shading is enabled, the x and y components of FragCoord reflect the location
* of one of the samples corresponding to the shader invocation.
*
* In other words, if the fragment shader is executing per-sample, then the position variable
* should always be per-sample.
*/
if (ctx->mod.info.has_per_sample_input &&
ctx->opts->environment == DXIL_ENVIRONMENT_VULKAN) {
nir_variable *pos_var = nir_find_variable_with_location(ctx->shader, nir_var_shader_in, VARYING_SLOT_POS);
if (pos_var)
pos_var->data.sample = true;
}
unsigned input_clip_size = ctx->mod.shader_kind == DXIL_PIXEL_SHADER ? unsigned input_clip_size = ctx->mod.shader_kind == DXIL_PIXEL_SHADER ?
ctx->shader->info.clip_distance_array_size : ctx->opts->input_clip_size; ctx->shader->info.clip_distance_array_size : ctx->opts->input_clip_size;
preprocess_signatures(&ctx->mod, ctx->shader, input_clip_size); preprocess_signatures(&ctx->mod, ctx->shader, input_clip_size);