GPU: Pre-emptively flush textures that are flushed often (to imported memory when available) (#4711)

* WIP texture pre-flush

Improve performance of TextureView GetData to buffer

Fix copy/sync ordering

Fix minor bug

Make this actually work

WIP host mapping stuff

* Fix usage flags

* message

* Cleanup 1

* Fix rebase

* Fix

* Improve pre-flush rules

* Fix pre-flush

* A lot of cleanup

* Use the host memory bits

* Select the correct memory type

* Cleanup TextureGroupHandle

* Missing comment

* Remove debugging logs

* Revert BufferHandle _value access modifier

* One interrupt action at a time.

* Support D32S8 to D24S8 conversion, safeguards

* Interrupt cannot happen in sync handle's lock

Waitable needs to be checked twice now, but this should stop it from deadlocking.

* Remove unused using

* Address some feedback

* Address feedback

* Address more feedback

* Address more feedback

* Improve sync rules

Should allow for faster sync in some cases.

src/Ryujinx.Graphics.OpenGL/OpenGLRenderer.cs

@@ -58,10 +58,31 @@ namespace Ryujinx.Graphics.OpenGL
         }
 
         public BufferHandle CreateBuffer(int size, BufferHandle storageHint)
+        {
+            return CreateBuffer(size, GAL.BufferAccess.Default);
+        }
+
+        public BufferHandle CreateBuffer(int size, GAL.BufferAccess access)
         {
             BufferCount++;
 
-            return Buffer.Create(size);
+            if (access == GAL.BufferAccess.FlushPersistent)
+            {
+                BufferHandle handle = Buffer.CreatePersistent(size);
+
+                PersistentBuffers.Map(handle, size);
+
+                return handle;
+            }
+            else
+            {
+                return Buffer.Create(size);
+            }
+        }
+
+        public BufferHandle CreateBuffer(nint pointer, int size)
+        {
+            throw new NotSupportedException();
         }
 
         public IProgram CreateProgram(ShaderSource[] shaders, ShaderInfo info)
@@ -88,6 +109,8 @@ namespace Ryujinx.Graphics.OpenGL
 
         public void DeleteBuffer(BufferHandle buffer)
         {
+            PersistentBuffers.Unmap(buffer);
+
             Buffer.Delete(buffer);
         }
 
@@ -272,5 +295,10 @@ namespace Ryujinx.Graphics.OpenGL
         {
             ScreenCaptured?.Invoke(this, bitmap);
         }
+
+        public bool PrepareHostMapping(nint address, ulong size)
+        {
+            return false;
+        }
     }
 }