From ada1c7f89d7d7ccdc4be2e60c1fe99861a51c3ce Mon Sep 17 00:00:00 2001
From: Georg Lehmann <dadschoorse@gmail.com>
Date: Sat, 12 Feb 2022 17:31:02 +0100
Subject: [PATCH] rendervulkan: Do rcas opacity in the correct colorspace if we
 calculate it anyway.

---
 src/shaders/cs_composite_rcas.comp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/shaders/cs_composite_rcas.comp b/src/shaders/cs_composite_rcas.comp
index 44afabc..1ad2927 100644
--- a/src/shaders/cs_composite_rcas.comp
+++ b/src/shaders/cs_composite_rcas.comp
@@ -51,14 +51,18 @@ void rcasComposite(uvec2 pos)
         if (all(lessThan(rcasPos, layer0Extent))) {
             FsrRcasF(outputValue.r, outputValue.g, outputValue.b, rcasPos, u_c1.xxxx);
 
-            // Technically the wrong color space but doing srgb -> linear -> srgb just for
-            // scaling is silly. This is good enough.
-            outputValue *= u_opacity[0];
+            if (c_layerCount == 1) {
+                // Technically the wrong color space if you just have one layer.
+                // but doing srgb -> linear -> srgb just for scaling is silly. This is good enough.
+                outputValue *= u_opacity[0];
+            }
         }
     }
 
+
     if (c_layerCount > 1) {
         outputValue = srgbToLinear(outputValue);
+        outputValue *= u_opacity[0];
         vec2 uv = vec2(pos);
 
         for (int i = 1; i < c_layerCount; i++) {