From c933cbe89d0aedf6ddbef2c0f320595973a1aec5 Mon Sep 17 00:00:00 2001
From: Salman Ahmed <frenzibyte@gmail.com>
Date: Mon, 21 Jun 2021 00:09:47 +0300
Subject: [PATCH] Add sample shaders and test case for ruleset-specific shaders

---
 .../Resources/Shaders/sh_TestFragment.fs      | 11 +++++++
 .../Resources/Shaders/sh_TestVertex.vs        | 31 +++++++++++++++++++
 .../Testing/TestSceneRulesetDependencies.cs   |  9 ++++++
 3 files changed, 51 insertions(+)
 create mode 100644 osu.Game.Tests/Resources/Shaders/sh_TestFragment.fs
 create mode 100644 osu.Game.Tests/Resources/Shaders/sh_TestVertex.vs

diff --git a/osu.Game.Tests/Resources/Shaders/sh_TestFragment.fs b/osu.Game.Tests/Resources/Shaders/sh_TestFragment.fs
new file mode 100644
index 0000000000..c70ad751be
--- /dev/null
+++ b/osu.Game.Tests/Resources/Shaders/sh_TestFragment.fs
@@ -0,0 +1,11 @@
+#include "sh_Utils.h"
+
+varying mediump vec2 v_TexCoord;
+varying mediump vec4 v_TexRect;
+
+void main(void)
+{
+    float hueValue = v_TexCoord.x / (v_TexRect[2] - v_TexRect[0]);
+    gl_FragColor = hsv2rgb(vec4(hueValue, 1, 1, 1));
+}
+
diff --git a/osu.Game.Tests/Resources/Shaders/sh_TestVertex.vs b/osu.Game.Tests/Resources/Shaders/sh_TestVertex.vs
new file mode 100644
index 0000000000..4485356fa4
--- /dev/null
+++ b/osu.Game.Tests/Resources/Shaders/sh_TestVertex.vs
@@ -0,0 +1,31 @@
+#include "sh_Utils.h"
+
+attribute highp vec2 m_Position;
+attribute lowp vec4 m_Colour;
+attribute mediump vec2 m_TexCoord;
+attribute mediump vec4 m_TexRect;
+attribute mediump vec2 m_BlendRange;
+
+varying highp vec2 v_MaskingPosition;
+varying lowp vec4 v_Colour;
+varying mediump vec2 v_TexCoord;
+varying mediump vec4 v_TexRect;
+varying mediump vec2 v_BlendRange;
+
+uniform highp mat4 g_ProjMatrix;
+uniform highp mat3 g_ToMaskingSpace;
+
+void main(void)
+{
+    // Transform from screen space to masking space.
+    highp vec3 maskingPos = g_ToMaskingSpace * vec3(m_Position, 1.0);
+    v_MaskingPosition = maskingPos.xy / maskingPos.z;
+
+    v_Colour = m_Colour;
+    v_TexCoord = m_TexCoord;
+    v_TexRect = m_TexRect;
+    v_BlendRange = m_BlendRange;
+
+    gl_Position = gProjMatrix * vec4(m_Position, 1.0, 1.0);
+}
+
diff --git a/osu.Game.Tests/Testing/TestSceneRulesetDependencies.cs b/osu.Game.Tests/Testing/TestSceneRulesetDependencies.cs
index 97087e31ab..433022788b 100644
--- a/osu.Game.Tests/Testing/TestSceneRulesetDependencies.cs
+++ b/osu.Game.Tests/Testing/TestSceneRulesetDependencies.cs
@@ -7,6 +7,7 @@ using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Audio.Sample;
 using osu.Framework.Configuration.Tracking;
+using osu.Framework.Graphics.Shaders;
 using osu.Framework.Graphics.Textures;
 using osu.Framework.IO.Stores;
 using osu.Framework.Testing;
@@ -45,6 +46,14 @@ namespace osu.Game.Tests.Testing
                 Dependencies.Get<ISampleStore>().Get(@"test-sample") != null);
         }
 
+        [Test]
+        public void TestRetrieveShader()
+        {
+            AddAssert("ruleset shaders retrieved", () =>
+                Dependencies.Get<ShaderManager>().LoadRaw(@"sh_TestVertex.vs") != null &&
+                Dependencies.Get<ShaderManager>().LoadRaw(@"sh_TestFragment.fs") != null);
+        }
+
         [Test]
         public void TestResolveConfigManager()
         {