Initial tessellation shader support (#2534)

* Initial tessellation shader support

* Nits

* Re-arrange built-in table

* This is not needed anymore

* PR feedback

1 files changed, 50 insertions, 3 deletions

diff --git a/Ryujinx.Graphics.Gpu/Engine/Threed/ThreedClassState.cs b/Ryujinx.Graphics.Gpu/Engine/Threed/ThreedClassState.cs
index a6392e3d..58bc0957 100644
--- a/Ryujinx.Graphics.Gpu/Engine/Threed/ThreedClassState.cs
+++ b/Ryujinx.Graphics.Gpu/Engine/Threed/ThreedClassState.cs
@@ -3,6 +3,7 @@ using Ryujinx.Graphics.GAL;
 using Ryujinx.Graphics.Gpu.Engine.InlineToMemory;
 using Ryujinx.Graphics.Gpu.Engine.Types;
 using Ryujinx.Graphics.Gpu.Image;
+using Ryujinx.Graphics.Shader;
 using System;
 
 namespace Ryujinx.Graphics.Gpu.Engine.Threed
@@ -20,6 +21,43 @@ namespace Ryujinx.Graphics.Gpu.Engine.Threed
     }
 
     /// <summary>
+    /// Tessellation mode.
+    /// </summary>
+    struct TessMode
+    {
+#pragma warning disable CS0649
+        public uint Packed;
+#pragma warning restore CS0649
+
+        /// <summary>
+        /// Unpacks the tessellation abstract patch type.
+        /// </summary>
+        /// <returns>Abtract patch type</returns>
+        public TessPatchType UnpackPatchType()
+        {
+            return (TessPatchType)(Packed & 3);
+        }
+
+        /// <summary>
+        /// Unpacks the spacing between tessellated vertices of the patch.
+        /// </summary>
+        /// <returns>Spacing between tessellated vertices</returns>
+        public TessSpacing UnpackSpacing()
+        {
+            return (TessSpacing)((Packed >> 4) & 3);
+        }
+
+        /// <summary>
+        /// Unpacks the primitive winding order.
+        /// </summary>
+        /// <returns>True if clockwise, false if counter-clockwise</returns>
+        public bool UnpackCw()
+        {
+            return (Packed & (1 << 8)) != 0;
+        }
+    }
+
+    /// <summary>
     /// Transform feedback buffer state.
     /// </summary>
     struct TfBufferState
@@ -661,7 +699,11 @@ namespace Ryujinx.Graphics.Gpu.Engine.Threed
         public Boolean32 EarlyZForce;
         public fixed uint Reserved214[45];
         public uint SyncpointAction;
-        public fixed uint Reserved2CC[44];
+        public fixed uint Reserved2CC[21];
+        public TessMode TessMode;
+        public Array4<float> TessOuterLevel;
+        public Array2<float> TessInnerLevel;
+        public fixed uint Reserved33C[16];
         public Boolean32 RasterizeEnable;
         public Array4<TfBufferState> TfBufferState;
         public fixed uint Reserved400[192];
@@ -679,9 +721,14 @@ namespace Ryujinx.Graphics.Gpu.Engine.Threed
         public float ClearDepthValue;
         public fixed uint ReservedD94[3];
         public uint ClearStencilValue;
-        public fixed uint ReservedDA4[7];
+        public fixed uint ReservedDA4[2];
+        public PolygonMode PolygonModeFront;
+        public PolygonMode PolygonModeBack;
+        public Boolean32 PolygonSmoothEnable;
+        public fixed uint ReservedDB8[2];
         public DepthBiasState DepthBiasState;
-        public fixed uint ReservedDCC[5];
+        public int PatchVertices;
+        public fixed uint ReservedDD0[4];
         public uint TextureBarrier;
         public fixed uint ReservedDE4[7];
         public Array16<ScissorState> ScissorState;