From 9ba9ae77b9e37a4f63524f03065b04af5853e37f Mon Sep 17 00:00:00 2001
From: David Zhao <nyquill@ppy.sh>
Date: Thu, 18 Jul 2019 21:02:47 +0900
Subject: [PATCH] Only mark diff parameter as high precision

---
 osu.Game.Resources/Shaders/sh_CircularFlashlight.fs | 3 ++-
 osu.Game.Resources/Shaders/sh_Flashlight.h          | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/osu.Game.Resources/Shaders/sh_CircularFlashlight.fs b/osu.Game.Resources/Shaders/sh_CircularFlashlight.fs
index 84aafd5..4030a8c 100644
--- a/osu.Game.Resources/Shaders/sh_CircularFlashlight.fs
+++ b/osu.Game.Resources/Shaders/sh_CircularFlashlight.fs
@@ -1,6 +1,7 @@
 #include "sh_Flashlight.h"
 
-vec4 getColourAt(vec2 diff, vec2 size, vec4 originalColour)
+// highp diff prevents loss in precision when calculating smoothing distance on GL_ES platforms
+vec4 getColourAt(highp vec2 diff, vec2 size, vec4 originalColour)
 {
     float dist = length(diff);
     float flashlightRadius = length(size);
diff --git a/osu.Game.Resources/Shaders/sh_Flashlight.h b/osu.Game.Resources/Shaders/sh_Flashlight.h
index 1d612e1..2189f11 100644
--- a/osu.Game.Resources/Shaders/sh_Flashlight.h
+++ b/osu.Game.Resources/Shaders/sh_Flashlight.h
@@ -1,5 +1,5 @@
 #ifdef GL_ES
-    precision highp float;
+    precision mediump float;
 #endif
 
 varying vec2 v_Position;