From 8f84e54bb053cad9599e443675761087ce884563 Mon Sep 17 00:00:00 2001
From: Robert Beckebans <robert.beckebans@gmail.com>
Date: Thu, 12 Oct 2023 10:11:00 +0200
Subject: [PATCH] Restored ternary operator usage for older DXC compilers.
 Thanks SRSaunders

---
 neo/shaders/builtin/SSAO/ssao_compute.cs.hlsl | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/neo/shaders/builtin/SSAO/ssao_compute.cs.hlsl b/neo/shaders/builtin/SSAO/ssao_compute.cs.hlsl
index e81c796a..445c5546 100644
--- a/neo/shaders/builtin/SSAO/ssao_compute.cs.hlsl
+++ b/neo/shaders/builtin/SSAO/ssao_compute.cs.hlsl
@@ -104,7 +104,11 @@ static const float g_RandomValues[16] =
 // over the diagonals in the octahedral map
 float2 octWrap( float2 v )
 {
+#if __HLSL_VERSION >= 2021
 	return ( 1.f - abs( v.yx ) ) * select( v.xy >= 0.f, 1.f, -1.f );
+#else
+	return ( 1.f - abs( v.yx ) ) * ( v.xy >= 0.f ? 1.f : -1.f );
+#endif
 }
 
 /**********************/
@@ -116,7 +120,11 @@ float2 ndirToOctSigned( float3 n )
 {
 	// Project the sphere onto the octahedron (|x|+|y|+|z| = 1) and then onto the xy-plane
 	float2 p = n.xy * ( 1.f / ( abs( n.x ) + abs( n.y ) + abs( n.z ) ) );
+#if __HLSL_VERSION >= 2021
 	return select( n.z < 0.f, octWrap( p ), p );
+#else
+	return ( n.z < 0.f ) ? octWrap( p ) : p;
+#endif
 }
 
 // Converts a point in the octahedral map to a normalized direction (non-equal area, signed)
@@ -127,7 +135,11 @@ float3 octToNdirSigned( float2 p )
 	// https://twitter.com/Stubbesaurus/status/937994790553227264
 	float3 n = float3( p.x, p.y, 1.0 - abs( p.x ) - abs( p.y ) );
 	float t = max( 0, -n.z );
+#if __HLSL_VERSION >= 2021
 	n.xy += select( n.xy >= 0.0, -t, t );
+#else
+	n.xy += n.xy >= 0.0 ? -t : t;
+#endif
 	return normalize( n );
 }