From ee8916c414dcc140ad379793cc3fee801ea5a0b8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Ol=C5=A1=C3=A1k?= <marek.olsak@amd.com>
Date: Tue, 24 Dec 2024 13:36:44 -0500
Subject: [PATCH] nir: use IO intrinsics in nir_lower_drawpixels

Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32779>
---
 src/compiler/nir/nir_lower_drawpixels.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/compiler/nir/nir_lower_drawpixels.c b/src/compiler/nir/nir_lower_drawpixels.c
index 3f0874a8634..f9aa2472919 100644
--- a/src/compiler/nir/nir_lower_drawpixels.c
+++ b/src/compiler/nir/nir_lower_drawpixels.c
@@ -40,6 +40,13 @@ typedef struct {
 static nir_def *
 get_texcoord(nir_builder *b, lower_drawpixels_state *state)
 {
+   if (b->shader->info.io_lowered) {
+      nir_def *baryc =
+         nir_load_barycentric_pixel(b, 32, .interp_mode = INTERP_MODE_SMOOTH);
+      return nir_load_interpolated_input(b, 4, 32, baryc, nir_imm_int(b, 0),
+                                         .io_semantics.location = VARYING_SLOT_TEX0);
+   }
+
    if (state->texcoord == NULL) {
       state->texcoord = nir_get_variable_with_location(state->shader, nir_var_shader_in,
                                                        VARYING_SLOT_TEX0, glsl_vec4_type());