From 4ead3bcebfd25ea2a3b8b2b96e0f1c0a71aa4e97 Mon Sep 17 00:00:00 2001
From: Benjamin Doherty <bendoherty@google.com>
Date: Tue, 25 Oct 2022 12:07:16 -0400
Subject: [PATCH] Force spirv-cross to keep Metal argument buffer equal sized

---
 shaders/src/main.fs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/shaders/src/main.fs b/shaders/src/main.fs
index 4665b01e34..cf1af5ea8a 100644
--- a/shaders/src/main.fs
+++ b/shaders/src/main.fs
@@ -32,6 +32,13 @@ void main() {
 
     fragColor = evaluateMaterial(inputs);
 
+#if defined(TARGET_METAL_ENVIRONMENT)
+    // Hack to force spirv-cross to keep the light_structure texture present in the argument buffer.
+    float hack = textureLod(light_structure, vec2(0.0, 0.0), 0.0).r;
+    fragColor.x += hack;
+    fragColor.x -= hack;
+#endif
+
 #if defined(VARIANT_HAS_DIRECTIONAL_LIGHTING) && defined(VARIANT_HAS_SHADOWING)
     bool visualizeCascades = bool(frameUniforms.cascades & 0x10u);
     if (visualizeCascades) {