1 files changed, 49 insertions, 0 deletions
diff --git a/Ryujinx.Graphics.Vulkan/FormatConverter.cs b/Ryujinx.Graphics.Vulkan/FormatConverter.cs
new file mode 100644
index 00000000..33472ae4
--- /dev/null
+++ b/Ryujinx.Graphics.Vulkan/FormatConverter.cs
@@ -0,0 +1,49 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Graphics.Vulkan
+{
+    class FormatConverter
+    {
+        public static void ConvertD24S8ToD32FS8(Span<byte> output, ReadOnlySpan<byte> input)
+        {
+            const float UnormToFloat = 1f / 0xffffff;
+
+            Span<uint> outputUint = MemoryMarshal.Cast<byte, uint>(output);
+            ReadOnlySpan<uint> inputUint = MemoryMarshal.Cast<byte, uint>(input);
+
+            int i = 0;
+
+            for (; i < inputUint.Length; i++)
+            {
+                uint depthStencil = inputUint[i];
+                uint depth = depthStencil >> 8;
+                uint stencil = depthStencil & 0xff;
+
+                int j = i * 2;
+
+                outputUint[j] = (uint)BitConverter.SingleToInt32Bits(depth * UnormToFloat);
+                outputUint[j + 1] = stencil;
+            }
+        }
+
+        public static void ConvertD32FS8ToD24S8(Span<byte> output, ReadOnlySpan<byte> input)
+        {
+            Span<uint> outputUint = MemoryMarshal.Cast<byte, uint>(output);
+            ReadOnlySpan<uint> inputUint = MemoryMarshal.Cast<byte, uint>(input);
+
+            int i = 0;
+
+            for (; i < inputUint.Length; i += 2)
+            {
+                float depth = BitConverter.Int32BitsToSingle((int)inputUint[i]);
+                uint stencil = inputUint[i + 1];
+                uint depthStencil = (Math.Clamp((uint)(depth * 0xffffff), 0, 0xffffff) << 8) | (stencil & 0xff);
+
+                int j = i >> 1;
+
+                outputUint[j] = depthStencil;
+            }
+        }
+    }
+}