Make structs readonly when applicable (#4002)

* Make all structs readonly when applicable. It should reduce amount of needless defensive copies

* Make structs with trivial boilerplate equality code record structs

* Remove unnecessary readonly modifiers from TextureCreateInfo

* Make BitMap structs readonly too

5 files changed, 6 insertions, 35 deletions

diff --git a/Ryujinx.Graphics.Shader/CodeGen/Glsl/Instructions/InstInfo.cs b/Ryujinx.Graphics.Shader/CodeGen/Glsl/Instructions/InstInfo.cs
index fc9aef7e..7b2a6b46 100644
--- a/Ryujinx.Graphics.Shader/CodeGen/Glsl/Instructions/InstInfo.cs
+++ b/Ryujinx.Graphics.Shader/CodeGen/Glsl/Instructions/InstInfo.cs
@@ -1,6 +1,6 @@
 namespace Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions
 {
-    struct InstInfo
+    readonly struct InstInfo
     {
         public InstType Type { get; }
 
diff --git a/Ryujinx.Graphics.Shader/CodeGen/Glsl/OperandManager.cs b/Ryujinx.Graphics.Shader/CodeGen/Glsl/OperandManager.cs
index b7891426..ccc87a7f 100644
--- a/Ryujinx.Graphics.Shader/CodeGen/Glsl/OperandManager.cs
+++ b/Ryujinx.Graphics.Shader/CodeGen/Glsl/OperandManager.cs
@@ -13,7 +13,7 @@ namespace Ryujinx.Graphics.Shader.CodeGen.Glsl
     {
         private static readonly string[] StagePrefixes = new string[] { "cp", "vp", "tcp", "tep", "gp", "fp" };
 
-        private struct BuiltInAttribute
+        private readonly struct BuiltInAttribute
         {
             public string Name { get; }
 
diff --git a/Ryujinx.Graphics.Shader/CodeGen/Spirv/OperationResult.cs b/Ryujinx.Graphics.Shader/CodeGen/Spirv/OperationResult.cs
index f432f1c4..f80c8110 100644
--- a/Ryujinx.Graphics.Shader/CodeGen/Spirv/OperationResult.cs
+++ b/Ryujinx.Graphics.Shader/CodeGen/Spirv/OperationResult.cs
@@ -3,7 +3,7 @@ using Spv.Generator;
 
 namespace Ryujinx.Graphics.Shader.CodeGen.Spirv
 {
-    struct OperationResult
+    readonly struct OperationResult
     {
         public static OperationResult Invalid => new OperationResult(AggregateType.Invalid, null);
 
diff --git a/Ryujinx.Graphics.Shader/CodeGen/Spirv/SpirvDelegates.cs b/Ryujinx.Graphics.Shader/CodeGen/Spirv/SpirvDelegates.cs
index fa0341ee..04c3be1b 100644
--- a/Ryujinx.Graphics.Shader/CodeGen/Spirv/SpirvDelegates.cs
+++ b/Ryujinx.Graphics.Shader/CodeGen/Spirv/SpirvDelegates.cs
@@ -8,7 +8,7 @@ namespace Ryujinx.Graphics.Shader.CodeGen.Spirv
     /// <summary>
     /// Delegate cache for SPIR-V instruction generators. Avoids delegate allocation when passing generators as arguments.
     /// </summary>
-    internal struct SpirvDelegates
+    internal readonly struct SpirvDelegates
     {
         // Unary
         public readonly FuncUnaryInstruction GlslFAbs;
diff --git a/Ryujinx.Graphics.Shader/CodeGen/Spirv/TextureMeta.cs b/Ryujinx.Graphics.Shader/CodeGen/Spirv/TextureMeta.cs
index 686259ad..4de05603 100644
--- a/Ryujinx.Graphics.Shader/CodeGen/Spirv/TextureMeta.cs
+++ b/Ryujinx.Graphics.Shader/CodeGen/Spirv/TextureMeta.cs
@@ -1,33 +1,4 @@
-using System;
-
-namespace Ryujinx.Graphics.Shader.CodeGen.Spirv
+namespace Ryujinx.Graphics.Shader.CodeGen.Spirv
 {
-    struct TextureMeta : IEquatable<TextureMeta>
-    {
-        public int CbufSlot { get; }
-        public int Handle { get; }
-        public TextureFormat Format { get; }
-
-        public TextureMeta(int cbufSlot, int handle, TextureFormat format)
-        {
-            CbufSlot = cbufSlot;
-            Handle = handle;
-            Format = format;
-        }
-
-        public override bool Equals(object obj)
-        {
-            return obj is TextureMeta other && Equals(other);
-        }
-
-        public bool Equals(TextureMeta other)
-        {
-            return CbufSlot == other.CbufSlot && Handle == other.Handle && Format == other.Format;
-        }
-
-        public override int GetHashCode()
-        {
-            return HashCode.Combine(CbufSlot, Handle, Format);
-        }
-    }
+    readonly record struct TextureMeta(int CbufSlot, int Handle, TextureFormat Format);
 }
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