[Mesa-dev] [PATCH 1/2] nir: retain pixel_center_integer information when lowering gl_FragCoord

[Timothy Arceri]

radeonsi needs to gather this information.
---
 src/compiler/nir/nir_lower_system_values.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/compiler/nir/nir_lower_system_values.c b/src/compiler/nir/nir_lower_system_values.c
index 3594f4ae5c..f8d8463f7f 100644
--- a/src/compiler/nir/nir_lower_system_values.c
+++ b/src/compiler/nir/nir_lower_system_values.c
@@ -133,6 +133,15 @@ convert_block(nir_block *block, nir_builder *b)
          break;
       }
 
+      case SYSTEM_VALUE_FRAG_COORD: {
+         nir_intrinsic_op sysval_op =
+            nir_intrinsic_from_system_value(var->data.location);
+         int idx = 0;
+         if (var->data.pixel_center_integer) {
+            idx = 1;
+         }
+         sysval = nir_load_system_value(b, sysval_op, idx);
+      }
       default:
          break;
       }
-- 
2.14.3