Separate GPU engines (part 2/2) (#2440)

* 3D engine now uses DeviceState too, plus new state modification tracking

* Remove old methods code

* Remove GpuState and friends

* Optimize DeviceState, force inline some functions

* This change was not supposed to go in

* Proper channel initialization

* Optimize state read/write methods even more

* Fix debug build

* Do not dirty state if the write is redundant

* The YControl register should dirty either the viewport or front face state too, to update the host origin

* Avoid redundant vertex buffer updates

* Move state and get rid of the Ryujinx.Graphics.Gpu.State namespace

* Comments and nits

* Fix rebase

* PR feedback

* Move changed = false to improve codegen

* PR feedback

* Carry RyuJIT a bit more

Ryujinx.Graphics.Gpu/Engine/Twod/TwodClassState.cs

@@ -13,17 +13,6 @@ namespace Ryujinx.Graphics.Gpu.Engine.Twod
         WriteThenAwaken = 1,
     }
 
-    /// <summary>
-    /// MME shadow RAM control mode.
-    /// </summary>
-    enum SetMmeShadowRamControlMode
-    {
-        MethodTrack = 0,
-        MethodTrackWithFilter = 1,
-        MethodPassthrough = 2,
-        MethodReplay = 3,
-    }
-
     /// <summary>
     /// Format of the destination texture.
     /// </summary>
@@ -506,7 +495,7 @@ namespace Ryujinx.Graphics.Gpu.Engine.Twod
     /// <summary>
     /// 2D class state.
     /// </summary>
-    unsafe struct TwodClassState
+    unsafe struct TwodClassState : IShadowState
     {
 #pragma warning disable CS0649
         public uint SetObject;