Add XML documentation to Ryujinx.Graphics.Gpu.Engine

Ryujinx.Graphics.Gpu/Engine/Compute.cs

@@ -10,6 +10,11 @@ namespace Ryujinx.Graphics.Gpu.Engine
 {
     partial class Methods
     {
+        /// <summary>
+        /// Dispatches compute work.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         public void Dispatch(GpuState state, int argument)
         {
             uint dispatchParamsAddress = (uint)state.Get<int>(MethodOffset.DispatchParamsAddress);

Ryujinx.Graphics.Gpu/Engine/ComputeParams.cs

@@ -4,22 +4,36 @@ using System.Runtime.InteropServices;
 
 namespace Ryujinx.Graphics.Gpu.Engine
 {
+    /// <summary>
+    /// Compute uniform buffer parameters.
+    /// </summary>
     struct UniformBufferParams
     {
         public int AddressLow;
         public int AddressHighAndSize;
 
+        /// <summary>
+        /// Packs the split address to a 64-bits integer.
+        /// </summary>
+        /// <returns>Uniform buffer GPU virtual address</returns>
         public ulong PackAddress()
         {
             return (uint)AddressLow | ((ulong)(AddressHighAndSize & 0xff) << 32);
         }
 
+        /// <summary>
+        /// Unpacks the uniform buffer size in bytes.
+        /// </summary>
+        /// <returns>Uniform buffer size in bytes</returns>
         public ulong UnpackSize()
         {
             return (ulong)((AddressHighAndSize >> 15) & 0x1ffff);
         }
     }
 
+    /// <summary>
+    /// Compute dispatch parameters.
+    /// </summary>
     struct ComputeParams
     {
         public int Unknown0;
@@ -61,6 +75,9 @@ namespace Ryujinx.Graphics.Gpu.Engine
         private UniformBufferParams _uniformBuffer6;
         private UniformBufferParams _uniformBuffer7;
 
+        /// <summary>
+        /// Uniform buffer parameters.
+        /// </summary>
         public Span<UniformBufferParams> UniformBuffers
         {
             get
@@ -89,36 +106,65 @@ namespace Ryujinx.Graphics.Gpu.Engine
         public int Unknown62;
         public int Unknown63;
 
+        /// <summary>
+        /// Unpacks the work group X size.
+        /// </summary>
+        /// <returns>Work group X size</returns>
         public int UnpackGridSizeX()
         {
             return GridSizeX & 0x7fffffff;
         }
 
+        /// <summary>
+        /// Unpacks the work group Y size.
+        /// </summary>
+        /// <returns>Work group Y size</returns>
         public int UnpackGridSizeY()
         {
             return GridSizeYZ & 0xffff;
         }
 
+        /// <summary>
+        /// Unpacks the work group Z size.
+        /// </summary>
+        /// <returns>Work group Z size</returns>
         public int UnpackGridSizeZ()
         {
             return (GridSizeYZ >> 16) & 0xffff;
         }
 
+        /// <summary>
+        /// Unpacks the local group X size.
+        /// </summary>
+        /// <returns>Local group X size</returns>
         public int UnpackBlockSizeX()
         {
             return (BlockSizeX >> 16) & 0xffff;
         }
 
+        /// <summary>
+        /// Unpacks the local group Y size.
+        /// </summary>
+        /// <returns>Local group Y size</returns>
         public int UnpackBlockSizeY()
         {
             return BlockSizeYZ & 0xffff;
         }
 
+        /// <summary>
+        /// Unpacks the local group Z size.
+        /// </summary>
+        /// <returns>Local group Z size</returns>
         public int UnpackBlockSizeZ()
         {
             return (BlockSizeYZ >> 16) & 0xffff;
         }
 
+        /// <summary>
+        /// Unpacks the uniform buffers enable mask.
+        /// Each bit set on the mask indicates that the respective buffer index is enabled.
+        /// </summary>
+        /// <returns>Uniform buffers enable mask</returns>
         public uint UnpackUniformBuffersEnableMask()
         {
             return (uint)UniformBuffersConfig & 0xff;

Ryujinx.Graphics.Gpu/Engine/Inline2Memory.cs

@@ -19,6 +19,11 @@ namespace Ryujinx.Graphics.Gpu.Engine
 
         private int[] _buffer;
 
+        /// <summary>
+        /// Launches Inline-to-Memory engine DMA copy.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         public void LaunchDma(GpuState state, int argument)
         {
             _params = state.Get<Inline2MemoryParams>(MethodOffset.I2mParams);
@@ -42,6 +47,11 @@ namespace Ryujinx.Graphics.Gpu.Engine
             _finished = false;
         }
 
+        /// <summary>
+        /// Pushes a word of data to the Inline-to-Memory engine.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         public void LoadInlineData(GpuState state, int argument)
         {
             if (!_finished)
@@ -55,6 +65,9 @@ namespace Ryujinx.Graphics.Gpu.Engine
             }
         }
 
+        /// <summary>
+        /// Performs actual copy of the inline data after the transfer is finished.
+        /// </summary>
         private void FinishTransfer()
         {
             Span<byte> data = MemoryMarshal.Cast<int, byte>(_buffer).Slice(0, _size);

Ryujinx.Graphics.Gpu/Engine/MethodClear.cs

@@ -5,6 +5,12 @@ namespace Ryujinx.Graphics.Gpu.Engine
 {
     partial class Methods
     {
+        /// <summary>
+        /// Clears the current color and depth-stencil buffers.
+        /// Which buffers should be cleared is also specified on the argument.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         private void Clear(GpuState state, int argument)
         {
             UpdateRenderTargetState(state, useControl: false);

Ryujinx.Graphics.Gpu/Engine/MethodCopyBuffer.cs

@@ -6,6 +6,11 @@ namespace Ryujinx.Graphics.Gpu.Engine
 {
     partial class Methods
     {
+        /// <summary>
+        /// Performs a buffer to buffer, or buffer to texture copy.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         private void CopyBuffer(GpuState state, int argument)
         {
             var cbp = state.Get<CopyBufferParams>(MethodOffset.CopyBufferParams);

Ryujinx.Graphics.Gpu/Engine/MethodCopyTexture.cs

@@ -7,6 +7,11 @@ namespace Ryujinx.Graphics.Gpu.Engine
 
     partial class Methods
     {
+        /// <summary>
+        /// Performs a texture to texture copy.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         private void CopyTexture(GpuState state, int argument)
         {
             var dstCopyTexture = state.Get<CopyTexture>(MethodOffset.CopyDstTexture);

Ryujinx.Graphics.Gpu/Engine/MethodDraw.cs

@@ -22,8 +22,17 @@ namespace Ryujinx.Graphics.Gpu.Engine
 
         private int _instanceIndex;
 
+        /// <summary>
+        /// Primitive type of the current draw.
+        /// </summary>
         public PrimitiveType PrimitiveType { get; private set; }
 
+        /// <summary>
+        /// Finishes draw call.
+        /// This draws geometry on the bound buffers based on the current GPU state.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         private void DrawEnd(GpuState state, int argument)
         {
             if (_instancedDrawPending)
@@ -86,6 +95,12 @@ namespace Ryujinx.Graphics.Gpu.Engine
             }
         }
 
+        /// <summary>
+        /// Starts draw.
+        /// This sets primitive type and instanced draw parameters.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         private void DrawBegin(GpuState state, int argument)
         {
             if ((argument & (1 << 26)) != 0)
@@ -106,11 +121,24 @@ namespace Ryujinx.Graphics.Gpu.Engine
             PrimitiveType = type;
         }
 
+        /// <summary>
+        /// Sets the index buffer count.
+        /// This also sets internal state that indicates that the next draw is a indexed draw.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         private void SetIndexBufferCount(GpuState state, int argument)
         {
             _drawIndexed = true;
         }
 
+        /// <summary>
+        /// Perform any deferred draws.
+        /// This is used for instanced draws.
+        /// Since each instance is a separate draw, we defer the draw and accumulate the instance count.
+        /// Once we detect the last instanced draw, then we perform the host instanced draw,
+        /// with the accumulated instance count.
+        /// </summary>
         public void PerformDeferredDraws()
         {
             // Perform any pending instanced draw.

Ryujinx.Graphics.Gpu/Engine/MethodReport.cs

@@ -10,6 +10,11 @@ namespace Ryujinx.Graphics.Gpu.Engine
     {
         private ulong _runningCounter;
 
+        /// <summary>
+        /// Writes a GPU counter to guest memory.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         private void Report(GpuState state, int argument)
         {
             ReportMode mode = (ReportMode)(argument & 3);
@@ -23,6 +28,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
             }
         }
 
+        /// <summary>
+        /// Writes a GPU semaphore value to guest memory.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
         private void ReportSemaphore(GpuState state)
         {
             var rs = state.Get<ReportState>(MethodOffset.ReportState);
@@ -32,12 +41,21 @@ namespace Ryujinx.Graphics.Gpu.Engine
             _context.AdvanceSequence();
         }
 
+        /// <summary>
+        /// Packed GPU counter data (including GPU timestamp) in memory.
+        /// </summary>
         private struct CounterData
         {
             public ulong Counter;
             public ulong Timestamp;
         }
 
+        /// <summary>
+        /// Writes a GPU counter to guest memory.
+        /// This also writes the current timestamp value.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="type">Counter to be written to memory</param>
         private void ReportCounter(GpuState state, ReportCounterType type)
         {
             CounterData counterData = new CounterData();
@@ -83,6 +101,12 @@ namespace Ryujinx.Graphics.Gpu.Engine
             _context.MemoryAccessor.Write(rs.Address.Pack(), data);
         }
 
+        /// <summary>
+        /// Converts a nanoseconds timestamp value to Maxwell time ticks.
+        /// The frequency is approximately 1.63Hz.
+        /// </summary>
+        /// <param name="nanoseconds">Timestamp in nanoseconds</param>
+        /// <returns>Maxwell ticks</returns>
         private static ulong ConvertNanosecondsToTicks(ulong nanoseconds)
         {
             // We need to divide first to avoid overflows.

Ryujinx.Graphics.Gpu/Engine/MethodResetCounter.cs

@@ -5,6 +5,11 @@ namespace Ryujinx.Graphics.Gpu.Engine
 {
     partial class Methods
     {
+        /// <summary>
+        /// Resets the value of a internal GPU counter back to zero.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         private void ResetCounter(GpuState state, int argument)
         {
             ResetCounterType type = (ResetCounterType)argument;

Ryujinx.Graphics.Gpu/Engine/MethodUniformBufferBind.cs

@@ -4,31 +4,62 @@ namespace Ryujinx.Graphics.Gpu.Engine
 {
     partial class Methods
     {
+        /// <summary>
+        /// Binds a uniform buffer for the vertex shader stage.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         private void UniformBufferBindVertex(GpuState state, int argument)
         {
             UniformBufferBind(state, argument, ShaderType.Vertex);
         }
 
+        /// <summary>
+        /// Binds a uniform buffer for the tessellation control shader stage.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         private void UniformBufferBindTessControl(GpuState state, int argument)
         {
             UniformBufferBind(state, argument, ShaderType.TessellationControl);
         }
 
+        /// <summary>
+        /// Binds a uniform buffer for the tessellation evaluation shader stage.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         private void UniformBufferBindTessEvaluation(GpuState state, int argument)
         {
             UniformBufferBind(state, argument, ShaderType.TessellationEvaluation);
         }
 
+        /// <summary>
+        /// Binds a uniform buffer for the geometry shader stage.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         private void UniformBufferBindGeometry(GpuState state, int argument)
         {
             UniformBufferBind(state, argument, ShaderType.Geometry);
         }
 
+        /// <summary>
+        /// Binds a uniform buffer for the fragment shader stage.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         private void UniformBufferBindFragment(GpuState state, int argument)
         {
             UniformBufferBind(state, argument, ShaderType.Fragment);
         }
 
+        /// <summary>
+        ///Binds a uniform buffer for the specified shader stage.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
+        /// <param name="type">Shader stage that will access the uniform buffer</param>
         private void UniformBufferBind(GpuState state, int argument, ShaderType type)
         {
             bool enable = (argument & 1) != 0;

Ryujinx.Graphics.Gpu/Engine/MethodUniformBufferUpdate.cs

@@ -4,6 +4,11 @@ namespace Ryujinx.Graphics.Gpu.Engine
 {
     partial class Methods
     {
+        /// <summary>
+        /// Updates the uniform buffer data with inline data.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">New uniform buffer data word</param>
         private void UniformBufferUpdate(GpuState state, int argument)
         {
             var uniformBuffer = state.Get<UniformBufferState>(MethodOffset.UniformBufferState);

Ryujinx.Graphics.Gpu/Engine/Methods.cs

@@ -12,6 +12,9 @@ namespace Ryujinx.Graphics.Gpu.Engine
 {
     using Texture = Image.Texture;
 
+    /// <summary>
+    /// GPU method implementations.
+    /// </summary>
     partial class Methods
     {
         private readonly GpuContext _context;
@@ -20,12 +23,23 @@ namespace Ryujinx.Graphics.Gpu.Engine
 
         private readonly ShaderProgramInfo[] _currentProgramInfo;
 
+        /// <summary>
+        /// GPU buffer manager.
+        /// </summary>
         public BufferManager BufferManager { get; }
+
+        /// <summary>
+        /// GPU texture manager.
+        /// </summary>
         public TextureManager TextureManager { get; }
 
         private bool _isAnyVbInstanced;
         private bool _vsUsesInstanceId;
 
+        /// <summary>
+        /// Creates a new instance of the GPU methods class.
+        /// </summary>
+        /// <param name="context">GPU context</param>
         public Methods(GpuContext context)
         {
             _context = context;
@@ -38,6 +52,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
             TextureManager = new TextureManager(context);
         }
 
+        /// <summary>
+        /// Register callback for GPU method calls that triggers an action on the GPU.
+        /// </summary>
+        /// <param name="state">GPU state where the triggers will be registered</param>
         public void RegisterCallbacks(GpuState state)
         {
             state.RegisterCallback(MethodOffset.LaunchDma,      LaunchDma);
@@ -72,6 +90,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
             state.RegisterCallback(MethodOffset.UniformBufferBindFragment,       UniformBufferBindFragment);
         }
 
+        /// <summary>
+        /// Updates host state based on the current guest GPU state.
+        /// </summary>
+        /// <param name="state">Guest GPU state</param>
         private void UpdateState(GpuState state)
         {
             // Shaders must be the first one to be updated if modified, because
@@ -175,6 +197,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
             CommitBindings();
         }
 
+        /// <summary>
+        /// Ensures that the bindings are visible to the host GPU.
+        /// This actually performs the binding using the host graphics API.
+        /// </summary>
         private void CommitBindings()
         {
             UpdateStorageBuffers();
@@ -183,6 +209,9 @@ namespace Ryujinx.Graphics.Gpu.Engine
             TextureManager.CommitGraphicsBindings();
         }
 
+        /// <summary>
+        /// Updates storage buffer bindings.
+        /// </summary>
         private void UpdateStorageBuffers()
         {
             for (int stage = 0; stage < _currentProgramInfo.Length; stage++)
@@ -213,6 +242,11 @@ namespace Ryujinx.Graphics.Gpu.Engine
             }
         }
 
+        /// <summary>
+        /// Updates render targets (color and depth-stencil buffers) based on current render target state.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="useControl">Use draw buffers information from render target control register</param>
         private void UpdateRenderTargetState(GpuState state, bool useControl)
         {
             var rtControl = state.Get<RtControl>(MethodOffset.RtControl);
@@ -267,12 +301,21 @@ namespace Ryujinx.Graphics.Gpu.Engine
             }
         }
 
+        /// <summary>
+        /// Checks if a render target color buffer is used.
+        /// </summary>
+        /// <param name="colorState">Color buffer information</param>
+        /// <returns>True if the specified buffer is enabled/used, false otherwise</returns>
         private static bool IsRtEnabled(RtColorState colorState)
         {
             // Colors are disabled by writing 0 to the format.
             return colorState.Format != 0 && colorState.WidthOrStride != 0;
         }
 
+        /// <summary>
+        /// Updates host depth test state based on current GPU state.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
         private void UpdateDepthTestState(GpuState state)
         {
             _context.Renderer.Pipeline.SetDepthTest(new DepthTestDescriptor(
@@ -281,6 +324,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
                 state.Get<CompareOp>(MethodOffset.DepthTestFunc)));
         }
 
+        /// <summary>
+        /// Updates host viewport transform and clipping state based on current GPU state.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
         private void UpdateViewportTransform(GpuState state)
         {
             DepthMode depthMode = state.Get<DepthMode>(MethodOffset.DepthMode);
@@ -343,6 +390,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
             _context.Renderer.Pipeline.SetViewports(0, viewports);
         }
 
+        /// <summary>
+        /// Updates host depth bias (also called polygon offset) state based on current GPU state.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
         private void UpdateDepthBiasState(GpuState state)
         {
             var depthBias = state.Get<DepthBiasState>(MethodOffset.DepthBiasState);
@@ -360,6 +411,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
             _context.Renderer.Pipeline.SetDepthBias(enables, factor, units, clamp);
         }
 
+        /// <summary>
+        /// Updates host stencil test state based on current GPU state.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
         private void UpdateStencilTestState(GpuState state)
         {
             var backMasks = state.Get<StencilBackMasks>    (MethodOffset.StencilBackMasks);
@@ -413,6 +468,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
                 backMask));
         }
 
+        /// <summary>
+        /// Updates current sampler pool address and size based on guest GPU state.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
         private void UpdateSamplerPoolState(GpuState state)
         {
             var texturePool = state.Get<PoolState>(MethodOffset.TexturePoolState);
@@ -427,6 +486,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
             TextureManager.SetGraphicsSamplerPool(samplerPool.Address.Pack(), maximumId, samplerIndex);
         }
 
+        /// <summary>
+        /// Updates current texture pool address and size based on guest GPU state.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
         private void UpdateTexturePoolState(GpuState state)
         {
             var texturePool = state.Get<PoolState>(MethodOffset.TexturePoolState);
@@ -436,6 +499,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
             TextureManager.SetGraphicsTextureBufferIndex(state.Get<int>(MethodOffset.TextureBufferIndex));
         }
 
+        /// <summary>
+        /// Updates host vertex attributes based on guest GPU state.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
         private void UpdateVertexAttribState(GpuState state)
         {
             VertexAttribDescriptor[] vertexAttribs = new VertexAttribDescriptor[16];
@@ -460,6 +527,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
             _context.Renderer.Pipeline.SetVertexAttribs(vertexAttribs);
         }
 
+        /// <summary>
+        /// Updates host primitive restart based on guest GPU state.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
         private void UpdatePrimitiveRestartState(GpuState state)
         {
             PrimitiveRestartState primitiveRestart = state.Get<PrimitiveRestartState>(MethodOffset.PrimitiveRestartState);
@@ -469,6 +540,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
                 primitiveRestart.Index);
         }
 
+        /// <summary>
+        /// Updates host index buffer binding based on guest GPU state.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
         private void UpdateIndexBufferState(GpuState state)
         {
             var indexBuffer = state.Get<IndexBufferState>(MethodOffset.IndexBufferState);
@@ -500,6 +575,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
             UpdateVertexBufferState(state);
         }
 
+        /// <summary>
+        /// Updates host vertex buffer bindings based on guest GPU state.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
         private void UpdateVertexBufferState(GpuState state)
         {
             _isAnyVbInstanced = false;
@@ -550,6 +629,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
             }
         }
 
+        /// <summary>
+        /// Updates host face culling and orientation based on guest GPU state.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
         private void UpdateFaceState(GpuState state)
         {
             var face = state.Get<FaceState>(MethodOffset.FaceState);
@@ -559,6 +642,11 @@ namespace Ryujinx.Graphics.Gpu.Engine
             _context.Renderer.Pipeline.SetFrontFace(face.FrontFace);
         }
 
+        /// <summary>
+        /// Updates host render target color masks, based on guest GPU state.
+        /// This defines with color channels are written to each color buffer.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
         private void UpdateRtColorMask(GpuState state)
         {
             bool rtColorMaskShared = state.Get<Boolean32>(MethodOffset.RtColorMaskShared);
@@ -582,6 +670,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
             _context.Renderer.Pipeline.SetRenderTargetColorMasks(componentMasks);
         }
 
+        /// <summary>
+        /// Updates host render target color buffer blending state, based on guest state.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
         private void UpdateBlendState(GpuState state)
         {
             bool blendIndependent = state.Get<Boolean32>(MethodOffset.BlendIndependent);
@@ -623,6 +715,9 @@ namespace Ryujinx.Graphics.Gpu.Engine
             }
         }
 
+        /// <summary>
+        /// Storage buffer address and size information.
+        /// </summary>
         private struct SbDescriptor
         {
             public uint AddressLow;
@@ -636,6 +731,10 @@ namespace Ryujinx.Graphics.Gpu.Engine
             }
         }
 
+        /// <summary>
+        /// Updates host shaders based on the guest GPU state.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
         private void UpdateShaderState(GpuState state)
         {
             ShaderAddresses addresses = new ShaderAddresses();
@@ -726,6 +825,11 @@ namespace Ryujinx.Graphics.Gpu.Engine
             _context.Renderer.Pipeline.SetProgram(gs.HostProgram);
         }
 
+        /// <summary>
+        /// Gets viewport transform enable.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <returns>Viewport transform enable</returns>
         public bool GetViewportTransformEnable(GpuState state)
         {
             // FIXME: We should read ViewportTransformEnable, but it seems that some games writes 0 there?
@@ -734,6 +838,11 @@ namespace Ryujinx.Graphics.Gpu.Engine
             return true;
         }
 
+        /// <summary>
+        /// Gets texture target from a sampler type.
+        /// </summary>
+        /// <param name="type">Sampler type</param>
+        /// <returns>Texture target value</returns>
         private static Target GetTarget(SamplerType type)
         {
             type &= ~(SamplerType.Indexed | SamplerType.Shadow);
@@ -776,16 +885,38 @@ namespace Ryujinx.Graphics.Gpu.Engine
             return Target.Texture2D;
         }
 
+        /// <summary>
+        /// Issues a texture barrier.
+        /// This waits until previous texture writes from the GPU to finish, before
+        /// performing new operations with said textures.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         private void TextureBarrier(GpuState state, int argument)
         {
             _context.Renderer.Pipeline.TextureBarrier();
         }
 
+        /// <summary>
+        /// Invalidates all modified textures on the cache.
+        /// </summary>
+        /// <param name="state">Current GPU state</param>
+        /// <param name="argument">Method call argument</param>
         private void InvalidateTextures(GpuState state, int argument)
         {
             TextureManager.Flush();
         }
 
+        /// <summary>
+        /// Issues a texture barrier.
+        /// This waits until previous texture writes from the GPU to finish, before
+        /// performing new operations with said textures.
+        /// This performs a per-tile wait, it is only valid if both the previous write
+        /// and current access has the same access patterns.
+        /// This may be faster than the regular barrier on tile-based rasterizers.
+        /// </summary>
+        /// <param name="state"></param>
+        /// <param name="argument"></param>
         private void TextureBarrierTiled(GpuState state, int argument)
         {
             _context.Renderer.Pipeline.TextureBarrierTiled();