From 9f3970f837eebf290c03988ef00dee68ca68f07b Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Tue, 1 Jun 2021 01:04:32 -0400
Subject: [PATCH] glsl: Add gl_ViewportIndex out attribute

---
 src/shader_recompiler/backend/glsl/emit_context.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/shader_recompiler/backend/glsl/emit_context.cpp b/src/shader_recompiler/backend/glsl/emit_context.cpp
index 2375b7a06..6e164b958 100644
--- a/src/shader_recompiler/backend/glsl/emit_context.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_context.cpp
@@ -151,6 +151,9 @@ void SetupOutPerVertex(Stage stage, const Info& info, std::string& header) {
         header += "float gl_ClipDistance[];";
     }
     header += "};\n";
+    if (info.stores_viewport_index) {
+        header += "out int gl_ViewportIndex;";
+    }
 }
 } // namespace
 
@@ -264,7 +267,6 @@ void EmitContext::SetupExtensions(std::string&) {
     }
     if (info.stores_viewport_index) {
         header += "#extension GL_ARB_shader_viewport_layer_array : enable\n";
-        header += "#extension GL_NV_viewport_array2 : enable\n";
     }
 }