From 65778a6b78ab8bde4090478482227e40c551db4d Mon Sep 17 00:00:00 2001
From: riperiperi <rhy3756547@hotmail.com>
Date: Thu, 24 Nov 2022 14:50:15 +0000
Subject: GPU: Don't trigger uploads for redundant buffer updates (#3828)

* Initial implementation

* Actually do The Thing

* Add remark about performance to IVirtualMemoryManager
---
 Ryujinx.Graphics.Gpu/Memory/PhysicalMemory.cs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

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

diff --git a/Ryujinx.Graphics.Gpu/Memory/PhysicalMemory.cs b/Ryujinx.Graphics.Gpu/Memory/PhysicalMemory.cs
index 155cba0f..051838f1 100644
--- a/Ryujinx.Graphics.Gpu/Memory/PhysicalMemory.cs
+++ b/Ryujinx.Graphics.Gpu/Memory/PhysicalMemory.cs
@@ -242,6 +242,19 @@ namespace Ryujinx.Graphics.Gpu.Memory
             WriteImpl(range, data, _cpuMemory.WriteUntracked);
         }
 
+        /// <summary>
+        /// Writes data to the application process, returning false if the data was not changed.
+        /// This triggers read memory tracking, as a redundancy check would be useless if the data is not up to date.
+        /// </summary>
+        /// <remarks>The memory manager can return that memory has changed when it hasn't to avoid expensive data copies.</remarks>
+        /// <param name="address">Address to write into</param>
+        /// <param name="data">Data to be written</param>
+        /// <returns>True if the data was changed, false otherwise</returns>
+        public bool WriteWithRedundancyCheck(ulong address, ReadOnlySpan<byte> data)
+        {
+            return _cpuMemory.WriteWithRedundancyCheck(address, data);
+        }
+
         private delegate void WriteCallback(ulong address, ReadOnlySpan<byte> data);
 
         /// <summary>
-- 
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