1 files changed, 55 insertions, 0 deletions
diff --git a/Ryujinx.Graphics.Texture/Utils/Block.cs b/Ryujinx.Graphics.Texture/Utils/Block.cs
new file mode 100644
index 00000000..a8bae077
--- /dev/null
+++ b/Ryujinx.Graphics.Texture/Utils/Block.cs
@@ -0,0 +1,55 @@
+namespace Ryujinx.Graphics.Texture.Utils
+{
+    struct Block
+    {
+        public ulong Low;
+        public ulong High;
+
+        public void Encode(ulong value, ref int offset, int bits)
+        {
+            if (offset >= 64)
+            {
+                High |= value << (offset - 64);
+            }
+            else
+            {
+                Low |= value << offset;
+
+                if (offset + bits > 64)
+                {
+                    int remainder = 64 - offset;
+                    High |= value >> remainder;
+                }
+            }
+
+            offset += bits;
+        }
+
+        public ulong Decode(ref int offset, int bits)
+        {
+            ulong value;
+            ulong mask = bits == 64 ? ulong.MaxValue : (1UL << bits) - 1;
+
+            if (offset >= 64)
+            {
+                value = (High >> (offset - 64)) & mask;
+            }
+            else
+            {
+                value = Low >> offset;
+
+                if (offset + bits > 64)
+                {
+                    int remainder = 64 - offset;
+                    value |= High << remainder;
+                }
+
+                value &= mask;
+            }
+
+            offset += bits;
+
+            return value;
+        }
+    }
+}
+\ No newline at end of file