1 files changed, 63 insertions, 0 deletions
diff --git a/src/Ryujinx.Graphics.Device/SizeCalculator.cs b/src/Ryujinx.Graphics.Device/SizeCalculator.cs
new file mode 100644
index 00000000..7409c041
--- /dev/null
+++ b/src/Ryujinx.Graphics.Device/SizeCalculator.cs
@@ -0,0 +1,63 @@
+using System;
+using System.Reflection;
+
+namespace Ryujinx.Graphics.Device
+{
+    public static class SizeCalculator
+    {
+        public static int SizeOf(Type type)
+        {
+            // Is type a enum type?
+            if (type.IsEnum)
+            {
+                type = type.GetEnumUnderlyingType();
+            }
+
+            // Is type a pointer type?
+            if (type.IsPointer || type == typeof(IntPtr) || type == typeof(UIntPtr))
+            {
+                return IntPtr.Size;
+            }
+
+            // Is type a struct type?
+            if (type.IsValueType && !type.IsPrimitive)
+            {
+                // Check if the struct has a explicit size, if so, return that.
+                if (type.StructLayoutAttribute.Size != 0)
+                {
+                    return type.StructLayoutAttribute.Size;
+                }
+
+                // Otherwise we calculate the sum of the sizes of all fields.
+                int size = 0;
+                var fields = type.GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
+
+                for (int fieldIndex = 0; fieldIndex < fields.Length; fieldIndex++)
+                {
+                    size += SizeOf(fields[fieldIndex].FieldType);
+                }
+
+                return size;
+            }
+
+            // Primitive types.
+            return (Type.GetTypeCode(type)) switch
+            {
+                TypeCode.SByte => sizeof(sbyte),
+                TypeCode.Byte => sizeof(byte),
+                TypeCode.Int16 => sizeof(short),
+                TypeCode.UInt16 => sizeof(ushort),
+                TypeCode.Int32 => sizeof(int),
+                TypeCode.UInt32 => sizeof(uint),
+                TypeCode.Int64 => sizeof(long),
+                TypeCode.UInt64 => sizeof(ulong),
+                TypeCode.Char => sizeof(char),
+                TypeCode.Single => sizeof(float),
+                TypeCode.Double => sizeof(double),
+                TypeCode.Decimal => sizeof(decimal),
+                TypeCode.Boolean => sizeof(bool),
+                _ => throw new ArgumentException($"Length for type \"{type.Name}\" is unknown.")
+            };
+        }
+    }
+}