From b51e924d411153f6ded13e92d011ed9aaee6f4ed Mon Sep 17 00:00:00 2001
From: TheOmyNomy <theomynomy@nomy.sh>
Date: Thu, 12 Aug 2021 22:36:06 +1000
Subject: [PATCH 1/2] Add separate legacy cursor trail shader

---
 .../Shaders/sh_LegacyCursorTrail.vs           | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 osu.Game.Resources/Shaders/sh_LegacyCursorTrail.vs

diff --git a/osu.Game.Resources/Shaders/sh_LegacyCursorTrail.vs b/osu.Game.Resources/Shaders/sh_LegacyCursorTrail.vs
new file mode 100644
index 0000000..d9e96d5
--- /dev/null
+++ b/osu.Game.Resources/Shaders/sh_LegacyCursorTrail.vs
@@ -0,0 +1,35 @@
+attribute vec2 m_Position;
+attribute vec4 m_Colour;
+attribute vec2 m_TexCoord;
+attribute vec4 m_TexRect;
+attribute float m_Time;
+
+varying vec2 v_DrawingPosition;
+varying vec2 v_MaskingPosition;
+varying vec4 v_Colour;
+varying vec2 v_TexCoord;
+varying vec4 v_TexRect;
+
+uniform mat4 g_ProjMatrix;
+uniform mat3 g_ToMaskingSpace;
+uniform mat3 g_ToDrawingSpace;
+
+uniform float g_FadeClock;
+
+void main(void)
+{
+    // Transform to position to masking space.
+    vec3 maskingPos = g_ToMaskingSpace * vec3(m_Position, 1.0);
+    v_MaskingPosition = maskingPos.xy / maskingPos.z;
+
+    // Transform to position to masking space.
+    vec3 drawingPos = g_ToDrawingSpace * vec3(m_Position, 1.0);
+    v_DrawingPosition = drawingPos.xy / drawingPos.z;
+
+    v_Colour = vec4(m_Colour.rgb, m_Colour.a * clamp(m_Time - g_FadeClock, 0.0, 1.0));
+     
+    v_TexCoord = m_TexCoord;
+    v_TexRect = m_TexRect;
+    
+    gl_Position = g_ProjMatrix * vec4(m_Position, 1.0, 1.0);
+}

From 89139a7634feae140a353f83fcf76fe572c4f6f1 Mon Sep 17 00:00:00 2001
From: smoogipoo <smoogipoo@smgi.me>
Date: Fri, 13 Aug 2021 10:10:22 +0900
Subject: [PATCH 2/2] Add fade exponent

---
 osu.Game.Resources/Shaders/sh_CursorTrail.vs  |  3 +-
 .../Shaders/sh_LegacyCursorTrail.vs           | 35 -------------------
 2 files changed, 2 insertions(+), 36 deletions(-)
 delete mode 100644 osu.Game.Resources/Shaders/sh_LegacyCursorTrail.vs

diff --git a/osu.Game.Resources/Shaders/sh_CursorTrail.vs b/osu.Game.Resources/Shaders/sh_CursorTrail.vs
index 3b03f9b..ba3865c 100644
--- a/osu.Game.Resources/Shaders/sh_CursorTrail.vs
+++ b/osu.Game.Resources/Shaders/sh_CursorTrail.vs
@@ -15,6 +15,7 @@ uniform mat3 g_ToMaskingSpace;
 uniform mat3 g_ToDrawingSpace;
 
 uniform float g_FadeClock;
+uniform float g_FadeExponent;
 
 void main(void)
 {
@@ -26,7 +27,7 @@ void main(void)
     vec3 drawingPos = g_ToDrawingSpace * vec3(m_Position, 1.0);
     v_DrawingPosition = drawingPos.xy / drawingPos.z;
 
-    v_Colour = vec4(m_Colour.rgb, m_Colour.a * pow(clamp(m_Time - g_FadeClock, 0.0, 1.0), 1.7));
+    v_Colour = vec4(m_Colour.rgb, m_Colour.a * pow(clamp(m_Time - g_FadeClock, 0.0, 1.0), g_FadeExponent));
      
     v_TexCoord = m_TexCoord;
     v_TexRect = m_TexRect;
diff --git a/osu.Game.Resources/Shaders/sh_LegacyCursorTrail.vs b/osu.Game.Resources/Shaders/sh_LegacyCursorTrail.vs
deleted file mode 100644
index d9e96d5..0000000
--- a/osu.Game.Resources/Shaders/sh_LegacyCursorTrail.vs
+++ /dev/null
@@ -1,35 +0,0 @@
-attribute vec2 m_Position;
-attribute vec4 m_Colour;
-attribute vec2 m_TexCoord;
-attribute vec4 m_TexRect;
-attribute float m_Time;
-
-varying vec2 v_DrawingPosition;
-varying vec2 v_MaskingPosition;
-varying vec4 v_Colour;
-varying vec2 v_TexCoord;
-varying vec4 v_TexRect;
-
-uniform mat4 g_ProjMatrix;
-uniform mat3 g_ToMaskingSpace;
-uniform mat3 g_ToDrawingSpace;
-
-uniform float g_FadeClock;
-
-void main(void)
-{
-    // Transform to position to masking space.
-    vec3 maskingPos = g_ToMaskingSpace * vec3(m_Position, 1.0);
-    v_MaskingPosition = maskingPos.xy / maskingPos.z;
-
-    // Transform to position to masking space.
-    vec3 drawingPos = g_ToDrawingSpace * vec3(m_Position, 1.0);
-    v_DrawingPosition = drawingPos.xy / drawingPos.z;
-
-    v_Colour = vec4(m_Colour.rgb, m_Colour.a * clamp(m_Time - g_FadeClock, 0.0, 1.0));
-     
-    v_TexCoord = m_TexCoord;
-    v_TexRect = m_TexRect;
-    
-    gl_Position = g_ProjMatrix * vec4(m_Position, 1.0, 1.0);
-}