Extend bindless elimination to work with masked and shifted handles (#2727)

* Extent bindless elimination to work with masked handles

* Extend bindless elimination to catch shifted pattern, refactor handle packing/unpacking

1 files changed, 54 insertions, 0 deletions

diff --git a/Ryujinx.Graphics.Shader/TextureHandle.cs b/Ryujinx.Graphics.Shader/TextureHandle.cs
new file mode 100644
index 00000000..b3712e6b
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/TextureHandle.cs
@@ -0,0 +1,54 @@
+using System.Runtime.CompilerServices;
+
+namespace Ryujinx.Graphics.Shader
+{
+    public enum TextureHandleType
+    {
+        CombinedSampler = 0, // Must be 0.
+        SeparateSamplerHandle = 1,
+        SeparateSamplerId = 2
+    }
+
+    public static class TextureHandle
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int PackSlots(int cbufSlot0, int cbufSlot1)
+        {
+            return cbufSlot0 | ((cbufSlot1 + 1) << 16);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static (int, int) UnpackSlots(int slots, int defaultTextureBufferIndex)
+        {
+            int textureBufferIndex;
+            int samplerBufferIndex;
+
+            if (slots < 0)
+            {
+                textureBufferIndex = defaultTextureBufferIndex;
+                samplerBufferIndex = textureBufferIndex;
+            }
+            else
+            {
+                uint high = (uint)slots >> 16;
+
+                textureBufferIndex = (ushort)slots;
+                samplerBufferIndex = high != 0 ? (int)high - 1 : textureBufferIndex;
+            }
+
+            return (textureBufferIndex, samplerBufferIndex);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int PackOffsets(int cbufOffset0, int cbufOffset1, TextureHandleType type)
+        {
+            return cbufOffset0 | (cbufOffset1 << 14) | ((int)type << 28);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static (int, int, TextureHandleType) UnpackOffsets(int handle)
+        {
+            return (handle & 0x3fff, (handle >> 14) & 0x3fff, (TextureHandleType)((uint)handle >> 28));
+        }
+    }
+}