implement save and restore state system

src/Ryujinx.Graphics.Metal/EncoderStateManager.cs

@@ -17,8 +17,8 @@ namespace Ryujinx.Graphics.Metal
         private readonly RenderPipelineCache _renderPipelineCache;
         private readonly DepthStencilCache _depthStencilCache;
 
-        private EncoderState _currentState = new();
+        public EncoderState _currentState = new();
-        private EncoderState _backState = new();
+        public List<EncoderState> _backStates = new();
 
         public readonly MTLBuffer IndexBuffer => _currentState.IndexBuffer;
         public readonly MTLIndexType IndexType => _currentState.IndexType;
@@ -34,13 +34,20 @@ namespace Ryujinx.Graphics.Metal
             _depthStencilCache = new(device);
         }
 
-        public void SwapStates()
+        public void SaveState()
         {
-            (_currentState, _backState) = (_backState, _currentState);
+            _backStates.Add(_currentState);
+        }
 
-            if (_pipeline.CurrentEncoderType == EncoderType.Render)
+        public void RestoreState()
         {
-                _pipeline.EndCurrentPass();
+            if (_backStates.Count > 0)
+            {
+                _currentState = _backStates[_backStates.Count - 1];
+                _backStates.RemoveAt(_backStates.Count - 1);
+            } else
+            {
+                Logger.Error?.Print(LogClass.Gpu, "No state to restore");
             }
         }
 

src/Ryujinx.Graphics.Metal/HelperShader.cs

@@ -64,12 +64,17 @@ namespace Ryujinx.Graphics.Metal
                 MipFilter = MTLSamplerMipFilter.NotMipmapped
             });
 
+            // Save current state
+            _pipeline.SaveState();
+
             _pipeline.SetProgram(_programColorBlit);
             _pipeline.SetRenderTargets([destination], null);
             _pipeline.SetTextureAndSampler(ShaderStage.Fragment, 0, source, new Sampler(sampler));
             _pipeline.SetPrimitiveTopology(PrimitiveTopology.Triangles);
             _pipeline.Draw(6, 1, 0, 0);
-            _pipeline.Finish();
+
+            // Restore previous state
+            _pipeline.RestoreState();
         }
 
         public unsafe void ClearColor(
@@ -91,6 +96,9 @@ namespace Ryujinx.Graphics.Metal
             var handle = buffer.NativePtr;
             var range = new BufferRange(Unsafe.As<IntPtr, BufferHandle>(ref handle), 0, ClearColorBufferSize);
 
+            // Save current state
+            _pipeline.SaveState();
+
             _pipeline.SetUniformBuffers([new BufferAssignment(0, range)]);
 
             _pipeline.SetProgram(_programColorClear);
@@ -98,7 +106,9 @@ namespace Ryujinx.Graphics.Metal
             // _pipeline.SetRenderTargetColorMasks([componentMask]);
             _pipeline.SetPrimitiveTopology(PrimitiveTopology.TriangleStrip);
             _pipeline.Draw(4, 1, 0, 0);
-            _pipeline.Finish();
+
+            // Restore previous state
+            _pipeline.RestoreState();
         }
 
         public unsafe void ClearDepthStencil(
@@ -123,15 +133,19 @@ namespace Ryujinx.Graphics.Metal
             var handle = buffer.NativePtr;
             var range = new BufferRange(Unsafe.As<IntPtr, BufferHandle>(ref handle), 0, ClearColorBufferSize);
 
+            // Save current state
+            _pipeline.SaveState();
+
             _pipeline.SetUniformBuffers([new BufferAssignment(0, range)]);
 
             _pipeline.SetProgram(_programDepthStencilClear);
-            _pipeline.SetRenderTargets([], dst);
             _pipeline.SetPrimitiveTopology(PrimitiveTopology.TriangleStrip);
             _pipeline.SetDepthTest(new DepthTestDescriptor(true, depthMask, CompareOp.Always));
             // _pipeline.SetStencilTest(CreateStencilTestDescriptor(stencilMask != 0, stencilValue, 0xFF, stencilMask));
             _pipeline.Draw(4, 1, 0, 0);
-            _pipeline.Finish();
+
+            // Restore previous state
+            _pipeline.RestoreState();
         }
 
         private static StencilTestDescriptor CreateStencilTestDescriptor(

src/Ryujinx.Graphics.Metal/Pipeline.cs

@@ -46,6 +46,16 @@ namespace Ryujinx.Graphics.Metal
             _encoderStateManager = new EncoderStateManager(_device, this);
         }
 
+        public void SaveState()
+        {
+            _encoderStateManager.SaveState();
+        }
+
+        public void RestoreState()
+        {
+            _encoderStateManager.RestoreState();
+        }
+
         public MTLRenderCommandEncoder GetOrCreateRenderEncoder()
         {
             MTLRenderCommandEncoder renderCommandEncoder;
@@ -161,7 +171,7 @@ namespace Ryujinx.Graphics.Metal
 
             EndCurrentPass();
 
-            _encoderStateManager.SwapStates();
+            SaveState();
 
             // TODO: Clean this up
             var textureInfo = new TextureCreateInfo((int)drawable.Texture.Width, (int)drawable.Texture.Height, (int)drawable.Texture.Depth, (int)drawable.Texture.MipmapLevelCount, (int)drawable.Texture.SampleCount, 0, 0, 0, Format.B8G8R8A8Unorm, 0, Target.Texture2D, SwizzleComponent.Red, SwizzleComponent.Green, SwizzleComponent.Blue, SwizzleComponent.Alpha);
@@ -169,15 +179,14 @@ namespace Ryujinx.Graphics.Metal
 
             _helperShader.BlitColor(tex, dest);
 
+            EndCurrentPass();
+
             _commandBuffer.PresentDrawable(drawable);
             _commandBuffer.Commit();
 
             _commandBuffer = _commandQueue.CommandBuffer();
-        }
 
-        public void Finish()
+            RestoreState();
-        {
-            _encoderStateManager.SwapStates();
         }
 
         public void Barrier()
@@ -207,8 +216,6 @@ namespace Ryujinx.Graphics.Metal
 
             Texture target = _encoderStateManager.RenderTargets[index];
 
-            _encoderStateManager.SwapStates();
-
             _helperShader.ClearColor(target, colors);
         }
 
@@ -216,8 +223,6 @@ namespace Ryujinx.Graphics.Metal
         {
             Texture target = _encoderStateManager.DepthStencil;
 
-            _encoderStateManager.SwapStates();
-
             _helperShader.ClearDepthStencil(target, [depthValue], depthMask, stencilValue, stencilMask);
         }