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-rw-r--r--src/compiler/spirv/vtn_variables.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/compiler/spirv/vtn_variables.c b/src/compiler/spirv/vtn_variables.c
index d4e3cac5db3..843801cae5a 100644
--- a/src/compiler/spirv/vtn_variables.c
+++ b/src/compiler/spirv/vtn_variables.c
@@ -1411,9 +1411,12 @@ vtn_get_builtin_location(struct vtn_builder *b,
break;
case SpvBuiltInBaseVertex:
/* OpenGL gl_BaseVertex (SYSTEM_VALUE_BASE_VERTEX) is not the same
- * semantic as SPIR-V BaseVertex (SYSTEM_VALUE_FIRST_VERTEX).
+ * semantic as Vulkan BaseVertex (SYSTEM_VALUE_FIRST_VERTEX).
*/
- *location = SYSTEM_VALUE_FIRST_VERTEX;
+ if (b->options->environment == NIR_SPIRV_OPENGL)
+ *location = SYSTEM_VALUE_BASE_VERTEX;
+ else
+ *location = SYSTEM_VALUE_FIRST_VERTEX;
set_mode_system_value(b, mode);
break;
case SpvBuiltInBaseInstance: