commit 575fb073170e38103ba3f18663ab25dadad45353
author Sally Qi <sallyqi@google.com> Mon May 09 12:34:52 2022 -0700
committer Sally Qi <sallyqi@google.com> Mon May 09 12:34:52 2022 -0700
tree 2a54ead1601c2935b6e456d3dcab455e58978b51
parent 0f24a7c37b3e65996c9bb88c3e22038ae2ca58ef

Fix shader calculation equations that causes SDR grayscale mess-up.

Bug: 219698906
Test: play YouTube videos with Focus Mode on
Change-Id: Ic1d3ef72778da4e69d33c11dc11872356b856a41

libs/shaders/shaders.cpp

diff --git a/libs/shaders/shaders.cpp b/libs/shaders/shaders.cpp
index f0d45c2..62745dc 100644
--- a/libs/shaders/shaders.cpp
+++ b/libs/shaders/shaders.cpp
@@ -78,7 +78,7 @@
             shader.append(R"(
 
                 float EOTF_sRGB(float srgb) {
-                    return srgb <= 0.08125 ? srgb / 4.50 : pow((srgb + 0.099) / 1.099, 0.45);
+                    return srgb <= 0.08125 ? srgb / 4.50 : pow((srgb + 0.099) / 1.099, 1 / 0.45);
                 }
 
                 float3 EOTF_sRGB(float3 srgb) {