From 1876b346fea647e8284a66bb6d62c38801035cff Mon Sep 17 00:00:00 2001
From: gdk <gab.dark.100@gmail.com>
Date: Sun, 13 Oct 2019 03:02:07 -0300
Subject: Initial work

---
 Ryujinx.Graphics.Texture/SizeInfo.cs | 58 ++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 Ryujinx.Graphics.Texture/SizeInfo.cs

(limited to 'Ryujinx.Graphics.Texture/SizeInfo.cs')

diff --git a/Ryujinx.Graphics.Texture/SizeInfo.cs b/Ryujinx.Graphics.Texture/SizeInfo.cs
new file mode 100644
index 00000000..37d824cc
--- /dev/null
+++ b/Ryujinx.Graphics.Texture/SizeInfo.cs
@@ -0,0 +1,58 @@
+using Ryujinx.Common;
+using System;
+
+namespace Ryujinx.Graphics.Texture
+{
+    public struct SizeInfo
+    {
+        private int[] _mipOffsets;
+        private int[] _allOffsets;
+
+        private int _levels;
+
+        public int LayerSize { get; }
+        public int TotalSize { get; }
+
+        public SizeInfo(
+            int[] mipOffsets,
+            int[] allOffsets,
+            int   levels,
+            int   layerSize,
+            int   totalSize)
+        {
+            _mipOffsets = mipOffsets;
+            _allOffsets = allOffsets;
+            _levels     = levels;
+            LayerSize   = layerSize;
+            TotalSize   = totalSize;
+        }
+
+        public int GetMipOffset(int level)
+        {
+            if ((uint)level > _mipOffsets.Length)
+            {
+                throw new ArgumentOutOfRangeException(nameof(level));
+            }
+
+            return _mipOffsets[level];
+        }
+
+        public bool FindView(int offset, int size, out int firstLayer, out int firstLevel)
+        {
+            int index = Array.BinarySearch(_allOffsets, offset);
+
+            if (index < 0)
+            {
+                firstLayer = 0;
+                firstLevel = 0;
+
+                return false;
+            }
+
+            firstLayer = index / _levels;
+            firstLevel = index - (firstLayer * _levels);
+
+            return true;
+        }
+    }
+}
\ No newline at end of file
-- 
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