From c2eefb06aa3522920548046ee0c1be59428649ed Mon Sep 17 00:00:00 2001
From: Courtney Goeltzenleuchter <courtney@LunarG.com>
Date: Wed, 13 Nov 2013 11:11:39 -0700
Subject: [PATCH] glsl: Add gl_ViewportIndex built-in variable

v2 (idr): Fix copy-and-paste bug... s/LAYER/VIEWPORT/

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
---
 src/glsl/builtin_variables.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/glsl/builtin_variables.cpp b/src/glsl/builtin_variables.cpp
index f630923eda4..d6bc3c07316 100644
--- a/src/glsl/builtin_variables.cpp
+++ b/src/glsl/builtin_variables.cpp
@@ -780,6 +780,8 @@ void
 builtin_variable_generator::generate_gs_special_vars()
 {
    add_output(VARYING_SLOT_LAYER, int_t, "gl_Layer");
+   if (state->ARB_viewport_array_enable)
+      add_output(VARYING_SLOT_VIEWPORT, int_t, "gl_ViewportIndex");
 
    /* Although gl_PrimitiveID appears in tessellation control and tessellation
     * evaluation shaders, it has a different function there than it has in
-- 
2.30.2