From e67660f3264a984674617d20b1341057963e637b Mon Sep 17 00:00:00 2001
From: dancho <dancho@google.com>
Date: Mon, 28 Oct 2024 08:47:45 -0700
Subject: [PATCH] Consistently use highp for HDR colors

GLSL 3.00 mediump doesn't require enough precision near zero
to correctly represent PQ colors where the [0, 1] GL range
represents [0, 10_000] nits.
This caused `noEffects_hlg10InputAndHdr10Output_matchesGoldenFile`
to fail on some devices.

PiperOrigin-RevId: 690627069
---
 .../src/main/assets/shaders/fragment_shader_oetf_es3.glsl       | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/effect/src/main/assets/shaders/fragment_shader_oetf_es3.glsl b/libraries/effect/src/main/assets/shaders/fragment_shader_oetf_es3.glsl
index 3dfc21bf2d..78324eba7b 100644
--- a/libraries/effect/src/main/assets/shaders/fragment_shader_oetf_es3.glsl
+++ b/libraries/effect/src/main/assets/shaders/fragment_shader_oetf_es3.glsl
@@ -89,7 +89,7 @@ highp vec3 applyOetf(highp vec3 linearColor) {
   }
 }
 
-vec3 normalizeHdrLuminance(vec3 inputColor) {
+highp vec3 normalizeHdrLuminance(highp vec3 inputColor) {
   const float PQ_MAX_LUMINANCE = 10000.0;
   const float HLG_MAX_LUMINANCE = 1000.0;
   if (uOutputColorTransfer == COLOR_TRANSFER_ST2084) {