starting graphics layer restructuring

.gitmodules

@@ -4,12 +4,12 @@
 [submodule "lib/FAudio"]
 	path = lib/FAudio
 	url = https://github.com/FNA-XNA/FAudio.git
-[submodule "lib/RefreshCS"]
-	path = lib/RefreshCS
-	url = https://gitea.moonside.games/MoonsideGames/RefreshCS.git
 [submodule "lib/WellspringCS"]
 	path = lib/WellspringCS
 	url = https://gitea.moonside.games/MoonsideGames/WellspringCS.git
 [submodule "lib/dav1dfile"]
 	path = lib/dav1dfile
 	url = https://github.com/MoonsideGames/dav1dfile.git
+[submodule "SDL2_gpuCS"]
+	path = lib/SDL2_gpuCS
+	url = https://github.com/MoonsideGames/SDL2_gpuCS.git

MoonWorks.csproj

@@ -11,7 +11,7 @@
 
 	<ItemGroup>
 		<Compile Include="lib\FAudio\csharp\FAudio.cs" />
-		<Compile Include="lib\RefreshCS\src\Refresh.cs" />
+		<Compile Include="lib\SDL2_gpuCS\SDL2_gpuCS.cs" />
 		<Compile Include="lib\SDL2-CS\src\SDL2.cs" />
 		<Compile Include="lib\WellspringCS\WellspringCS.cs" />
 		<Compile Include="lib\dav1dfile\csharp\dav1dfile.cs" />

lib/RefreshCS

@@ -1 +0,0 @@
-Subproject commit b92ecb60e3f60c3cce694477cbde381449759c58

lib/SDL2_gpuCS

@@ -0,0 +1 @@
+Subproject commit b3cf918f900a24d131b4eb130a87dd12b4e4ca8c

src/Graphics/Bindings/BufferBinding.cs

@@ -1,21 +1,19 @@
-using RefreshCS;
+using SDL2_gpuCS;
+namespace MoonWorks.Graphics;
 
-namespace MoonWorks.Graphics
+/// <summary>
-{
+/// A buffer-offset pair to be used when binding buffers.
-	/// <summary>
+/// </summary>
-	/// A buffer-offset pair to be used when binding vertex or index buffers.
+public readonly record struct BufferBinding(
-	/// </summary>
+	GpuBuffer Buffer,
-	public readonly record struct BufferBinding(
+	uint Offset
-		GpuBuffer Buffer,
+) {
-		uint Offset
+	public SDL_Gpu.BufferBinding ToRefresh()
-	) {
+	{
-		public Refresh.BufferBinding ToRefresh()
+		return new SDL_Gpu.BufferBinding
 		{
-			return new Refresh.BufferBinding
+			Buffer = Buffer.Handle,
-			{
+			Offset = Offset
-				gpuBuffer = Buffer.Handle,
+		};
-				offset = Offset
-			};
-		}
 	}
 }

src/Graphics/Bindings/ComputeBufferBinding.cs

@@ -1,35 +1,34 @@
-using RefreshCS;
+using SDL2_gpuCS;
 
-namespace MoonWorks.Graphics
+namespace MoonWorks.Graphics;
-{
+
-	/// <summary>
+/// <summary>
-	/// Binding specification to be used when binding buffers for compute shaders.
+/// Binding specification to be used when binding buffers for compute shaders.
-	/// </summary>
+/// </summary>
-	/// <param name="GpuBuffer">The GpuBuffer to bind.</param>
+/// <param name="GpuBuffer">The GpuBuffer to bind.</param>
-	/// <param name="WriteOption">
+/// <param name="WriteOption">
-	///   Specifies data dependency behavior when this buffer is written to in the shader. <br/>
+///   Specifies data dependency behavior when this buffer is written to in the shader. <br/>
-	///
+///
-	///   Cycle:
+///   Cycle:
-	///     If this buffer has been used in commands that have not finished,
+///     If this buffer has been used in commands that have not finished,
-	///     the implementation may choose to prevent a dependency on those commands
+///     the implementation may choose to prevent a dependency on those commands
-	///     at the cost of increased memory usage.
+///     at the cost of increased memory usage.
-	///     You may NOT assume that any of the previous data is retained.
+///     You may NOT assume that any of the previous data is retained.
-	///     This may prevent stalls when frequently updating a resource.  <br />
+///     This may prevent stalls when frequently updating a resource.  <br />
-	///
+///
-	///   SafeOverwrite:
+///   SafeOverwrite:
-	///     Overwrites the data safely using a GPU memory barrier.
+///     Overwrites the data safely using a GPU memory barrier.
-	/// </param>
+/// </param>
-	public readonly record struct ComputeBufferBinding(
+public readonly record struct ComputeBufferBinding(
-		GpuBuffer GpuBuffer,
+	GpuBuffer GpuBuffer,
-		WriteOptions WriteOption
+	WriteOptions WriteOption
-	) {
+) {
-		public Refresh.ComputeBufferBinding ToRefresh()
+	public SDL_Gpu.BufferBinding ToRefresh()
+	{
+		return new Refresh.ComputeBufferBinding
 		{
-			return new Refresh.ComputeBufferBinding
+			gpuBuffer = GpuBuffer.Handle,
-			{
+			writeOption = (Refresh.WriteOptions) WriteOption
-				gpuBuffer = GpuBuffer.Handle,
+		};
-				writeOption = (Refresh.WriteOptions) WriteOption
-			};
-		}
 	}
 }

src/Graphics/Bindings/TextureSamplerBinding.cs

@@ -1,4 +1,4 @@
-using RefreshCS;
+using SDL2_gpuCS;
 
 namespace MoonWorks.Graphics
 {
@@ -9,12 +9,12 @@ namespace MoonWorks.Graphics
 		Texture Texture,
 		Sampler Sampler
 	) {
-		public Refresh.TextureSamplerBinding ToRefresh()
+		public SDL_Gpu.TextureSamplerBinding ToSDL()
 		{
-			return new Refresh.TextureSamplerBinding
+			return new SDL_Gpu.TextureSamplerBinding
 			{
-				texture = Texture.Handle,
+				Texture = Texture.Handle,
-				sampler = Sampler.Handle
+				Sampler = Sampler.Handle
 			};
 		}
 	}

src/Graphics/RenderPass.cs

@@ -0,0 +1,485 @@
+using System;
+using System.Runtime.InteropServices;
+using SDL2_gpuCS;
+namespace MoonWorks.Graphics;
+
+/// <summary>
+/// Render passes are begun in command buffers and are used to apply render state and issue draw calls.
+/// Render passes are pooled and should not be referenced after calling EndRenderPass.
+/// </summary>
+public class RenderPass
+{
+	public nint Handle { get; internal set; }
+
+#if DEBUG
+	internal bool active;
+	GraphicsPipeline currentGraphicsPipeline;
+	uint colorAttachmentCount;
+	SampleCount colorAttachmentSampleCount;
+	TextureFormat colorFormatOne;
+	TextureFormat colorFormatTwo;
+	TextureFormat colorFormatThree;
+	TextureFormat colorFormatFour;
+	bool hasDepthStencilAttachment;
+	SampleCount depthStencilAttachmentSampleCount;
+	TextureFormat depthStencilFormat;
+#endif
+
+	internal void SetHandle(nint handle)
+	{
+		Handle = handle;
+	}
+
+	/// <summary>
+	/// Binds a graphics pipeline so that rendering work may be performed.
+	/// </summary>
+	/// <param name="graphicsPipeline">The graphics pipeline to bind.</param>
+	public void BindGraphicsPipeline(
+		GraphicsPipeline graphicsPipeline
+	) {
+#if DEBUG
+		AssertRenderPassActive();
+		AssertRenderPassPipelineFormatMatch(graphicsPipeline);
+
+		if (colorAttachmentCount > 0)
+		{
+			if (graphicsPipeline.SampleCount != colorAttachmentSampleCount)
+			{
+				throw new System.InvalidOperationException($"Sample count mismatch! Graphics pipeline sample count: {graphicsPipeline.SampleCount}, Color attachment sample count: {colorAttachmentSampleCount}");
+			}
+		}
+
+		if (hasDepthStencilAttachment)
+		{
+			if (graphicsPipeline.SampleCount != depthStencilAttachmentSampleCount)
+			{
+				throw new System.InvalidOperationException($"Sample count mismatch! Graphics pipeline sample count: {graphicsPipeline.SampleCount}, Depth stencil attachment sample count: {depthStencilAttachmentSampleCount}");
+			}
+		}
+#endif
+
+		SDL_Gpu.SDL_GpuBindGraphicsPipeline(
+			Handle,
+			graphicsPipeline.Handle
+		);
+
+#if DEBUG
+		currentGraphicsPipeline = graphicsPipeline;
+#endif
+	}
+
+	/// <summary>
+	/// Sets the viewport.
+	/// </summary>
+	public void SetViewport(in Viewport viewport)
+	{
+#if DEBUG
+		AssertRenderPassActive();
+#endif
+
+		SDL_Gpu.SDL_GpuSetViewport(
+			Handle,
+			viewport.ToRefresh()
+		);
+	}
+
+	/// <summary>
+	/// Sets the scissor area.
+	/// </summary>
+	public void SetScissor(in Rect scissor)
+	{
+#if DEBUG
+		AssertRenderPassActive();
+
+		if (scissor.X < 0 || scissor.Y < 0 || scissor.W <= 0 || scissor.H <= 0)
+		{
+			throw new System.ArgumentOutOfRangeException("Scissor position cannot be negative and dimensions must be positive!");
+		}
+#endif
+
+		SDL_Gpu.SDL_GpuSetScissor(
+			Handle,
+			scissor.ToRefresh()
+		);
+	}
+
+	/// <summary>
+	/// Binds vertex buffers to be used by subsequent draw calls.
+	/// </summary>
+	/// <param name="bufferBinding">Buffer to bind and associated offset.</param>
+	/// <param name="firstBinding">The index of the first vertex input binding whose state is updated by the command.</param>
+	public unsafe void BindVertexBuffers(
+		in BufferBinding bufferBinding,
+		uint firstBinding = 0
+	) {
+#if DEBUG
+		AssertGraphicsPipelineBound();
+#endif
+
+		var bindingArray = stackalloc SDL_Gpu.BufferBinding[1];
+		bindingArray[0] = bufferBinding.ToRefresh();
+
+		SDL_Gpu.SDL_GpuBindVertexBuffers(
+			Handle,
+			firstBinding,
+			bindingArray,
+			1
+		);
+	}
+
+	/// <summary>
+	/// Binds vertex buffers to be used by subsequent draw calls.
+	/// </summary>
+	/// <param name="bufferBindingOne">Buffer to bind and associated offset.</param>
+	/// <param name="bufferBindingTwo">Buffer to bind and associated offset.</param>
+	/// <param name="firstBinding">The index of the first vertex input binding whose state is updated by the command.</param>
+	public unsafe void BindVertexBuffers(
+		in BufferBinding bufferBindingOne,
+		in BufferBinding bufferBindingTwo,
+		uint firstBinding = 0
+	) {
+#if DEBUG
+		AssertGraphicsPipelineBound();
+#endif
+
+		var bindingArray = stackalloc SDL_Gpu.BufferBinding[2];
+		bindingArray[0] = bufferBindingOne.ToRefresh();
+		bindingArray[1] = bufferBindingTwo.ToRefresh();
+
+		SDL_Gpu.SDL_GpuBindVertexBuffers(
+			Handle,
+			firstBinding,
+			bindingArray,
+			2
+		);
+	}
+
+	/// <summary>
+	/// Binds vertex buffers to be used by subsequent draw calls.
+	/// </summary>
+	/// <param name="bufferBindingOne">Buffer to bind and associated offset.</param>
+	/// <param name="bufferBindingTwo">Buffer to bind and associated offset.</param>
+	/// <param name="bufferBindingThree">Buffer to bind and associated offset.</param>
+	/// <param name="firstBinding">The index of the first vertex input binding whose state is updated by the command.</param>
+	public unsafe void BindVertexBuffers(
+		in BufferBinding bufferBindingOne,
+		in BufferBinding bufferBindingTwo,
+		in BufferBinding bufferBindingThree,
+		uint firstBinding = 0
+	) {
+#if DEBUG
+		AssertGraphicsPipelineBound();
+#endif
+
+		var bindingArray = stackalloc SDL_Gpu.BufferBinding[3];
+		bindingArray[0] = bufferBindingOne.ToRefresh();
+		bindingArray[1] = bufferBindingTwo.ToRefresh();
+		bindingArray[2] = bufferBindingThree.ToRefresh();
+
+		SDL_Gpu.SDL_GpuBindVertexBuffers(
+			Handle,
+			firstBinding,
+			bindingArray,
+			3
+		);
+	}
+
+	/// <summary>
+	/// Binds vertex buffers to be used by subsequent draw calls.
+	/// </summary>
+	/// <param name="bufferBindingOne">Buffer to bind and associated offset.</param>
+	/// <param name="bufferBindingTwo">Buffer to bind and associated offset.</param>
+	/// <param name="bufferBindingThree">Buffer to bind and associated offset.</param>
+	/// <param name="bufferBindingFour">Buffer to bind and associated offset.</param>
+	/// <param name="firstBinding">The index of the first vertex input binding whose state is updated by the command.</param>
+	public unsafe void BindVertexBuffers(
+		in BufferBinding bufferBindingOne,
+		in BufferBinding bufferBindingTwo,
+		in BufferBinding bufferBindingThree,
+		in BufferBinding bufferBindingFour,
+		uint firstBinding = 0
+	) {
+#if DEBUG
+		AssertGraphicsPipelineBound();
+#endif
+
+		var bindingArray = stackalloc SDL_Gpu.BufferBinding[4];
+		bindingArray[0] = bufferBindingOne.ToRefresh();
+		bindingArray[1] = bufferBindingTwo.ToRefresh();
+		bindingArray[2] = bufferBindingThree.ToRefresh();
+		bindingArray[3] = bufferBindingFour.ToRefresh();
+
+		SDL_Gpu.SDL_GpuBindVertexBuffers(
+			Handle,
+			firstBinding,
+			bindingArray,
+			4
+		);
+	}
+
+	/// <summary>
+	/// Binds vertex buffers to be used by subsequent draw calls.
+	/// </summary>
+	/// <param name="bufferBindings">Spawn of buffers to bind and their associated offsets.</param>
+	/// <param name="firstBinding">The index of the first vertex input binding whose state is updated by the command.</param>
+	public unsafe void BindVertexBuffers(
+		in Span<BufferBinding> bufferBindings,
+		uint firstBinding = 0
+	) {
+#if DEBUG
+		AssertGraphicsPipelineBound();
+#endif
+
+		SDL_Gpu.BufferBinding* bufferBindingsArray = (SDL_Gpu.BufferBinding*) NativeMemory.Alloc((nuint) (Marshal.SizeOf<SDL_Gpu.BufferBinding>() * bufferBindings.Length));
+
+		for (var i = 0; i < bufferBindings.Length; i += 1)
+		{
+			bufferBindingsArray[i] = bufferBindings[i].ToRefresh();
+		}
+
+		SDL_Gpu.SDL_GpuBindVertexBuffers(
+			Handle,
+			firstBinding,
+			bufferBindingsArray,
+			(uint) bufferBindings.Length
+		);
+
+		NativeMemory.Free(bufferBindingsArray);
+	}
+
+	/// <summary>
+	/// Binds an index buffer to be used by subsequent draw calls.
+	/// </summary>
+	/// <param name="indexBuffer">The index buffer to bind.</param>
+	/// <param name="indexElementSize">The size in bytes of the index buffer elements.</param>
+	/// <param name="offset">The offset index for the buffer.</param>
+	public void BindIndexBuffer(
+		BufferBinding bufferBinding,
+		IndexElementSize indexElementSize
+	)
+	{
+#if DEBUG
+		AssertGraphicsPipelineBound();
+#endif
+
+		SDL_Gpu.SDL_GpuBindIndexBuffer(
+			Handle,
+			bufferBinding.ToRefresh(),
+			(SDL_Gpu.IndexElementSize) indexElementSize
+		);
+	}
+
+	/// <summary>
+	/// Binds samplers to be used by the vertex shader.
+	/// </summary>
+	/// <param name="textureSamplerBindings">The texture-sampler to bind.</param>
+	public unsafe void BindVertexSampler(
+		in TextureSamplerBinding textureSamplerBinding,
+		uint slot = 0
+	) {
+#if DEBUG
+		AssertGraphicsPipelineBound();
+		AssertTextureSamplerBindingNonNull(textureSamplerBinding);
+		AssertTextureHasSamplerFlag(textureSamplerBinding.Texture);
+#endif
+
+		var bindingArray = stackalloc SDL_Gpu.TextureSamplerBinding[1];
+		bindingArray[0] = textureSamplerBinding.ToSDL();
+
+		SDL_Gpu.SDL_GpuBindVertexSamplers(
+			Handle,
+			slot,
+			bindingArray,
+			1
+		);
+	}
+
+	public unsafe void BindVertexSamplers(
+		in Span<TextureSamplerBinding> textureSamplerBindings,
+		uint firstSlot = 0
+	) {
+#if DEBUG
+		AssertGraphicsPipelineBound();
+
+		for (var i = 0; i < textureSamplerBindings.Length; i += 1)
+		{
+			AssertTextureSamplerBindingNonNull(textureSamplerBindings[i]);
+			AssertTextureHasSamplerFlag(textureSamplerBindings[i].Texture);
+		}
+#endif
+
+		SDL_Gpu.TextureSamplerBinding* samplerBindingsArray =
+			(SDL_Gpu.TextureSamplerBinding*) NativeMemory.Alloc(
+				(nuint) (Marshal.SizeOf<SDL_Gpu.TextureSamplerBinding>() * textureSamplerBindings.Length)
+			);
+
+		for (var i = 0; i < textureSamplerBindings.Length; i += 1)
+		{
+			samplerBindingsArray[i] = textureSamplerBindings[i].ToSDL();
+		}
+
+		SDL_Gpu.SDL_GpuBindVertexSamplers(
+			Handle,
+			firstSlot,
+			samplerBindingsArray,
+			(uint) textureSamplerBindings.Length
+		);
+
+		NativeMemory.Free(samplerBindingsArray);
+	}
+
+	public unsafe void BindVertexStorageTexture(
+		in TextureSlice storageTextureSlice,
+		uint slot = 0
+	) {
+#if DEBUG
+		AssertGraphicsPipelineBound();
+		AssertTextureNonNull(storageTextureSlice.Texture);
+		AssertTextureHasGraphicsStorageFlag(storageTextureSlice.Texture);
+#endif
+
+		var sliceArray = stackalloc SDL_Gpu.TextureSlice[1];
+		sliceArray[0] = storageTextureSlice.ToSDL();
+
+		SDL_Gpu.SDL_GpuBindVertexStorageTextures(
+			Handle,
+			slot,
+			sliceArray,
+			1
+		);
+	}
+
+	public unsafe void BindVertexStorageTextures(
+		in Span<TextureSlice> storageTextureSlices,
+		uint firstSlot = 0
+	) {
+#if DEBUG
+		AssertGraphicsPipelineBound();
+
+		for (var i = 0; i < storageTextureSlices.Length; i += 1)
+		{
+			AssertTextureNonNull(storageTextureSlices[i].Texture);
+			AssertTextureHasGraphicsStorageFlag(storageTextureSlices[i].Texture);
+		}
+#endif
+
+		SDL_Gpu.TextureSlice* sliceArray =
+			(SDL_Gpu.TextureSlice*) NativeMemory.Alloc(
+				(nuint) (Marshal.SizeOf<SDL_Gpu.TextureSlice>() * storageTextureSlices.Length)
+			);
+
+		for (var i = 0; i < storageTextureSlices.Length; i += 1)
+		{
+			sliceArray[i] = storageTextureSlices[i].ToSDL();
+		}
+
+		SDL_Gpu.SDL_GpuBindVertexStorageTextures(
+			Handle,
+			firstSlot,
+			sliceArray,
+			(uint) storageTextureSlices.Length
+		);
+
+		NativeMemory.Free(sliceArray);
+	}
+
+#if DEBUG
+	private void AssertRenderPassActive(string message = "Render pass is not active!")
+	{
+		if (!active)
+		{
+			throw new System.InvalidOperationException(message);
+		}
+	}
+
+	private void AssertRenderPassPipelineFormatMatch(GraphicsPipeline graphicsPipeline)
+	{
+		for (var i = 0; i < graphicsPipeline.AttachmentInfo.ColorAttachmentDescriptions.Length; i += 1)
+		{
+			TextureFormat format;
+			if (i == 0)
+			{
+				format = colorFormatOne;
+			}
+			else if (i == 1)
+			{
+				format = colorFormatTwo;
+			}
+			else if (i == 2)
+			{
+				format = colorFormatThree;
+			}
+			else
+			{
+				format = colorFormatFour;
+			}
+
+			var pipelineFormat = graphicsPipeline.AttachmentInfo.ColorAttachmentDescriptions[i].Format;
+			if (pipelineFormat != format)
+			{
+				throw new System.InvalidOperationException($"Color texture format mismatch! Pipeline expects {pipelineFormat}, render pass attachment is {format}");
+			}
+		}
+
+		if (graphicsPipeline.AttachmentInfo.HasDepthStencilAttachment)
+		{
+			var pipelineDepthFormat = graphicsPipeline.AttachmentInfo.DepthStencilFormat;
+
+			if (!hasDepthStencilAttachment)
+			{
+				throw new System.InvalidOperationException("Pipeline expects depth attachment!");
+			}
+
+			if (pipelineDepthFormat != depthStencilFormat)
+			{
+				throw new System.InvalidOperationException($"Depth texture format mismatch! Pipeline expects {pipelineDepthFormat}, render pass attachment is {depthStencilFormat}");
+			}
+		}
+	}
+
+	private void AssertGraphicsPipelineBound(string message = "No graphics pipeline is bound!")
+	{
+		if (currentGraphicsPipeline == null)
+		{
+			throw new System.InvalidOperationException(message);
+		}
+	}
+
+	private void AssertTextureNonNull(in TextureSlice textureSlice)
+	{
+		if (textureSlice.Texture == null)
+		{
+			throw new NullReferenceException("Texture must not be null!");
+		}
+	}
+
+	private void AssertTextureSamplerBindingNonNull(in TextureSamplerBinding binding)
+	{
+		if (binding.Texture == null || binding.Texture.Handle == IntPtr.Zero)
+		{
+			throw new NullReferenceException("Texture binding must not be null!");
+		}
+
+		if (binding.Sampler == null || binding.Sampler.Handle == IntPtr.Zero)
+		{
+			throw new NullReferenceException("Sampler binding must not be null!");
+		}
+	}
+
+	private void AssertTextureHasSamplerFlag(Texture texture)
+	{
+		if ((texture.UsageFlags & TextureUsageFlags.Sampler) == 0)
+		{
+			throw new System.ArgumentException("The bound Texture's UsageFlags must include TextureUsageFlags.Sampler!");
+		}
+	}
+
+	private void AssertTextureHasGraphicsStorageFlag(Texture texture)
+	{
+		if ((texture.UsageFlags & TextureUsageFlags.GraphicsStorage) == 0)
+		{
+			throw new System.ArgumentException("The bound Texture's UsageFlags must include TextureUsageFlags.GraphicsStorage!");
+		}
+	}
+#endif
+}

src/Graphics/TextureSlice.cs

@@ -1,33 +1,31 @@
-using RefreshCS;
+using SDL2_gpuCS;
+namespace MoonWorks.Graphics;
 
-namespace MoonWorks.Graphics
+/// <summary>
+/// A texture slice specifies a subresource of a texture.
+/// </summary>
+public struct TextureSlice
 {
-	/// <summary>
+	public Texture Texture;
-	/// A texture slice specifies a subresource of a texture.
+	public uint MipLevel;
-	/// </summary>
+	public uint Layer;
-	public struct TextureSlice
+
+	public uint Size => (Texture.Width * Texture.Height * Texture.Depth * Texture.BytesPerPixel(Texture.Format) / Texture.BlockSizeSquared(Texture.Format)) >> (int) MipLevel;
+
+	public TextureSlice(Texture texture)
 	{
-		public Texture Texture;
+		Texture = texture;
-		public uint MipLevel;
+		MipLevel = 0;
-		public uint Layer;
+		Layer = 0;
+	}
 
-		public uint Size => (Texture.Width * Texture.Height * Texture.Depth * Texture.BytesPerPixel(Texture.Format) / Texture.BlockSizeSquared(Texture.Format)) >> (int) MipLevel;
+	public SDL_Gpu.TextureSlice ToSDL()
-
+	{
-		public TextureSlice(Texture texture)
+		return new SDL_Gpu.TextureSlice
 		{
-			Texture = texture;
+			Texture = Texture.Handle,
-			MipLevel = 0;
+			MipLevel = MipLevel,
-			Layer = 0;
+			Layer = Layer
-		}
+		};
-
-		public Refresh.TextureSlice ToRefreshTextureSlice()
-		{
-			return new Refresh.TextureSlice
-			{
-				texture = Texture.Handle,
-				mipLevel = MipLevel,
-				layer = Layer
-			};
-		}
 	}
 }