1 files changed, 58 insertions, 0 deletions
diff --git a/src/Ryujinx.Graphics.Gpu/Shader/TransformFeedbackDescriptor.cs b/src/Ryujinx.Graphics.Gpu/Shader/TransformFeedbackDescriptor.cs
new file mode 100644
index 00000000..5baf2a1a
--- /dev/null
+++ b/src/Ryujinx.Graphics.Gpu/Shader/TransformFeedbackDescriptor.cs
@@ -0,0 +1,58 @@
+using Ryujinx.Common.Memory;
+using System;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Graphics.Gpu.Shader
+{
+    /// <summary>
+    /// Transform feedback descriptor.
+    /// </summary>
+    struct TransformFeedbackDescriptor
+    {
+        // New fields should be added to the end of the struct to keep disk shader cache compatibility.
+
+        /// <summary>
+        /// Index of the transform feedback.
+        /// </summary>
+        public readonly int BufferIndex;
+
+        /// <summary>
+        /// Amount of bytes consumed per vertex.
+        /// </summary>
+        public readonly int Stride;
+
+        /// <summary>
+        /// Number of varyings written into the buffer.
+        /// </summary>
+        public readonly int VaryingCount;
+
+        /// <summary>
+        /// Location of varyings to be written into the buffer. Each byte is one location.
+        /// </summary>
+        public Array32<uint> VaryingLocations; // Making this readonly breaks AsSpan
+
+        /// <summary>
+        /// Creates a new transform feedback descriptor.
+        /// </summary>
+        /// <param name="bufferIndex">Index of the transform feedback</param>
+        /// <param name="stride">Amount of bytes consumed per vertex</param>
+        /// <param name="varyingCount">Number of varyings written into the buffer. Indicates size in bytes of <paramref name="varyingLocations"/></param>
+        /// <param name="varyingLocations">Location of varyings to be written into the buffer. Each byte is one location</param>
+        public TransformFeedbackDescriptor(int bufferIndex, int stride, int varyingCount, ref Array32<uint> varyingLocations)
+        {
+            BufferIndex = bufferIndex;
+            Stride = stride;
+            VaryingCount = varyingCount;
+            VaryingLocations = varyingLocations;
+        }
+
+        /// <summary>
+        /// Gets a span of the <see cref="VaryingLocations"/>.
+        /// </summary>
+        /// <returns>Span of varying locations</returns>
+        public ReadOnlySpan<byte> AsSpan()
+        {
+            return MemoryMarshal.Cast<uint, byte>(VaryingLocations.AsSpan()).Slice(0, Math.Min(128, VaryingCount));
+        }
+    }
+}