From ef58f66331d6dae6942da4781be2c7954f364f94 Mon Sep 17 00:00:00 2001
From: Josh Tsuji <tsuji@google.com>
Date: Tue, 30 Mar 2021 14:29:47 -0400
Subject: [PATCH] Tweak exposure effect on ImageWallpaper.

This changes the exposure values so that the wallpaper is more visible during the beginning of the exposure effect, so that the shape of the reveal scrim from the power button/lift is more visible initially.

Test: manual, looks good
Bug: 181020504
Change-Id: I77216550d9507e0bdfa38976329170b40345ffa1
---
 packages/SystemUI/res/raw/image_wallpaper_fragment_shader.glsl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/SystemUI/res/raw/image_wallpaper_fragment_shader.glsl b/packages/SystemUI/res/raw/image_wallpaper_fragment_shader.glsl
index e9c838999dda6..7aca9f8440fc5 100644
--- a/packages/SystemUI/res/raw/image_wallpaper_fragment_shader.glsl
+++ b/packages/SystemUI/res/raw/image_wallpaper_fragment_shader.glsl
@@ -46,7 +46,7 @@ void main() {
     // Transform it using the S curve created by the smoothstep. This will increase the contrast.
     lum = smoothstep(0., 1., lum) + 0.001;
 
-    lum = relativeExposureCompensation(lum, mix(-15., 10., uExposure));
+    lum = relativeExposureCompensation(lum, mix(-5., 10., uExposure));
     lum = mix(clamp(lum, 0.0, 1.0), 1.0, normalizedRange(uExposure, 0.55, 1.0));
     color.rgb *= lum;