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] 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);
+}