[10.x.x] Fix some builtin stereo shaders with HDRP

com.unity.render-pipelines.high-definition/CHANGELOG.md

@@ -126,6 +126,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Implemented ray traced reflections for transparent objects.
 - Add a new parameter to control reflections in recursive rendering.
 - Added an initial version of SSGI.
+- Added back-compatibility with builtin stereo matrices.
 
 ### Fixed
 - Fix when rescale probe all direction below zero (1219246)

com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/HDRenderPipeline.cs

@@ -1136,6 +1136,7 @@ void UpdateShaderVariablesGlobalCB(HDCamera hdCamera, CommandBuffer cmd)
 
             ConstantBuffer.PushGlobal(cmd, m_ShaderVariablesGlobalCB, HDShaderIDs._ShaderVariablesGlobal);
 
+            hdCamera.xr.UpdateBuiltinStereoMatrices(cmd);
             hdCamera.UpdateShaderVariablesXRCB(ref m_ShaderVariablesXRCB);
             ConstantBuffer.PushGlobal(cmd, m_ShaderVariablesXRCB, HDShaderIDs._ShaderVariablesXR);
 

com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/XR/XRPass.cs

@@ -182,7 +182,7 @@ internal void AddViewInternal(XRView xrView)
                 {
                     Debug.LogWarning("If you're trying to enable XR single-pass after the first frame, you need to set TextureXR.maxViews to 2 before the render pipeline is created (typically in a script with Awake()).");
                 }
-                
+
                 throw new NotImplementedException($"Invalid XR setup for single-pass, trying to add too many views! Max supported: {maxSupportedViews}");
             }
         }
@@ -274,5 +274,30 @@ internal void RenderOcclusionMeshes(CommandBuffer cmd, RTHandle depthBuffer)
                 }
             }
         }
+
+        static readonly int _unity_StereoMatrixV = Shader.PropertyToID("unity_StereoMatrixV");
+        static readonly int _unity_StereoMatrixP = Shader.PropertyToID("unity_StereoMatrixP");
+        static readonly int _unity_StereoMatrixVP = Shader.PropertyToID("unity_StereoMatrixVP");
+        Matrix4x4[] builtinViewMatrix = new Matrix4x4[2];
+        Matrix4x4[] builtinProjMatrix = new Matrix4x4[2];
+        Matrix4x4[] builtinViewProjMatrix = new Matrix4x4[2];
+
+        // Maintain compatibility with builtin renderer
+        internal void UpdateBuiltinStereoMatrices(CommandBuffer cmd)
+        {
+            if (singlePassEnabled)
+            {
+                for (int viewIndex = 0; viewIndex < 2; ++viewIndex)
+                {
+                    builtinViewMatrix[viewIndex] = GetViewMatrix(viewIndex);
+                    builtinProjMatrix[viewIndex] = GL.GetGPUProjectionMatrix(GetProjMatrix(viewIndex), true);
+                    builtinViewProjMatrix[viewIndex] = builtinProjMatrix[viewIndex] * builtinViewMatrix[viewIndex];
+                }
+
+                cmd.SetGlobalMatrixArray(_unity_StereoMatrixV, builtinViewMatrix);
+                cmd.SetGlobalMatrixArray(_unity_StereoMatrixP, builtinProjMatrix);
+                cmd.SetGlobalMatrixArray(_unity_StereoMatrixVP, builtinViewProjMatrix);
+            }
+        }
     }
 }

com.unity.testing.hdrp/TestRunner/HDRP_TestSettings.cs

@@ -30,10 +30,6 @@ public class HDRP_TestSettings : GraphicsTestSettings
 
     void Awake()
     {
-        // Built-in font shaders are incompatible with XR, replace them with a ShaderGraph version
-        if (XRSystem.testModeEnabled && xrCompatible)
-            doBeforeTest.AddListener(ReplaceBuiltinFontShaders);
-
         if (renderPipelineAsset == null)
         {
             Debug.LogWarning("No RenderPipelineAsset has been assigned in the test settings. This may result in a wrong test.");
@@ -60,31 +56,4 @@ void OnApplicationQuit()
 
         quitDebug.Clear();
     }
-
-    void ReplaceBuiltinFontShaders()
-    {
-#if UNITY_EDITOR
-        var fontMaterialSG = AssetDatabase.LoadAssetAtPath<Material>("Packages/com.unity.testing.hdrp/Fonts/Font Material SG.mat");
-        if (fontMaterialSG != null)
-        {
-            foreach (var textMesh in GameObject.FindObjectsOfType<TextMesh>())
-            {
-                var textMeshRenderer = textMesh.gameObject.GetComponent<MeshRenderer>();
-
-                if (!textMeshRenderer.material.shader.name.StartsWith("Shader Graphs"))
-                {
-                    // From Unity source: Runtime\Resources\Assets\DefaultResources\Font.shader
-                    var fontTexture = textMeshRenderer.material.GetTexture("_MainTex");
-                    var fontColor = textMeshRenderer.material.GetColor("_Color");
-
-                    textMeshRenderer.material = fontMaterialSG;
-                    textMeshRenderer.material.SetTexture("_MainTex", fontTexture);
-                    textMeshRenderer.material.SetColor("_Color", fontColor);
-
-                    textMeshRenderer.shadowCastingMode = ShadowCastingMode.Off;
-                }
-            }
-        }
-#endif
-    }
 }