From f565b0e5a6bebc09381aabb046e9b0b6285b7d10 Mon Sep 17 00:00:00 2001
From: gdkchan <gab.dark.100@gmail.com>
Date: Sat, 23 Jan 2021 09:38:00 -0300
Subject: Match texture if the physical range is the same (#1934)

* Match texture if the physical range is the same

* XML docs and comments
---
 Ryujinx.Graphics.Gpu/Memory/MemoryManager.cs | 33 ++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

(limited to 'Ryujinx.Graphics.Gpu/Memory/MemoryManager.cs')

diff --git a/Ryujinx.Graphics.Gpu/Memory/MemoryManager.cs b/Ryujinx.Graphics.Gpu/Memory/MemoryManager.cs
index 7021cd20..5776836c 100644
--- a/Ryujinx.Graphics.Gpu/Memory/MemoryManager.cs
+++ b/Ryujinx.Graphics.Gpu/Memory/MemoryManager.cs
@@ -343,6 +343,39 @@ namespace Ryujinx.Graphics.Gpu.Memory
             return new MultiRange(regions.ToArray());
         }
 
+        /// <summary>
+        /// Checks if a given GPU virtual memory range is mapped to the same physical regions
+        /// as the specified physical memory multi-range.
+        /// </summary>
+        /// <param name="range">Physical memory multi-range</param>
+        /// <param name="va">GPU virtual memory address</param>
+        /// <returns>True if the virtual memory region is mapped into the specified physical one, false otherwise</returns>
+        public bool CompareRange(MultiRange range, ulong va)
+        {
+            va &= ~PageMask;
+
+            for (int i = 0; i < range.Count; i++)
+            {
+                MemoryRange currentRange = range.GetSubRange(i);
+
+                ulong address = currentRange.Address & ~PageMask;
+                ulong endAddress = (currentRange.EndAddress + PageMask) & ~PageMask;
+
+                while (address < endAddress)
+                {
+                    if (Translate(va) != address)
+                    {
+                        return false;
+                    }
+
+                    va += PageSize;
+                    address += PageSize;
+                }
+            }
+
+            return true;
+        }
+
         /// <summary>
         /// Validates a GPU virtual address.
         /// </summary>
-- 
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