.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

@@ -3,6 +3,7 @@
 	<PropertyGroup>
 		<TargetFramework>net8.0</TargetFramework>
 		<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+		<LangVersion>11</LangVersion>
 	</PropertyGroup>
 
 	<PropertyGroup>
@@ -11,7 +12,7 @@
 
 	<ItemGroup>
 		<Compile Include="lib\FAudio\csharp\FAudio.cs" />
-		<Compile Include="lib\SDL2_gpuCS\SDL2_gpuCS.cs" />
+		<Compile Include="lib\RefreshCS\src\Refresh.cs" />
 		<Compile Include="lib\SDL2-CS\src\SDL2.cs" />
 		<Compile Include="lib\WellspringCS\WellspringCS.cs" />
 		<Compile Include="lib\dav1dfile\csharp\dav1dfile.cs" />
@@ -25,8 +26,8 @@
 	</ItemGroup>
 
 	<ItemGroup>
-		<EmbeddedResource Include="src\Graphics\StockShaders\Binary\fullscreen.vert.refresh">
+		<EmbeddedResource Include="src\Graphics\StockShaders\Binary\video_fullscreen.vert.refresh">
-			<LogicalName>MoonWorks.Graphics.StockShaders.Fullscreen.vert.refresh</LogicalName>
+			<LogicalName>MoonWorks.Graphics.StockShaders.VideoFullscreen.vert.refresh</LogicalName>
 		</EmbeddedResource>
 		<EmbeddedResource Include="src\Graphics\StockShaders\Binary\video_yuv2rgba.frag.refresh">
 			<LogicalName>MoonWorks.Graphics.StockShaders.VideoYUV2RGBA.frag.refresh</LogicalName>
@@ -37,8 +38,5 @@
 		<EmbeddedResource Include="src\Graphics\StockShaders\Binary\text_msdf.frag.refresh">
 			<LogicalName>MoonWorks.Graphics.StockShaders.TextMSDF.frag.refresh</LogicalName>
 		</EmbeddedResource>
-		<EmbeddedResource Include="src\Graphics\StockShaders\Binary\blit.frag.refresh">
-			<LogicalName>MoonWorks.Graphics.StockShaders.Blit.frag.refresh</LogicalName>
-		</EmbeddedResource>
 	</ItemGroup>
 </Project>

MoonWorks.dll.config

@@ -5,8 +5,8 @@
 	<dllmap dll="SDL2" os="linux,freebsd,netbsd" target="libSDL2-2.0.so.0"/>
 
 	<dllmap dll="Refresh" os="windows" target="Refresh.dll"/>
-	<dllmap dll="Refresh" os="osx" target="libRefresh.2.dylib"/>
+	<dllmap dll="Refresh" os="osx" target="libRefresh.1.dylib"/>
-	<dllmap dll="Refresh" os="linux,freebsd,netbsd" target="libRefresh.so.2"/>
+	<dllmap dll="Refresh" os="linux,freebsd,netbsd" target="libRefresh.so.1"/>
 
 	<dllmap dll="FAudio" os="windows" target="FAudio.dll"/>
 	<dllmap dll="FAudio" os="osx" target="libFAudio.0.dylib"/>

lib/RefreshCS

@@ -0,0 +1 @@
+Subproject commit b5325e6d0329eeb35b074091a569a5f679852d28

lib/SDL2_gpuCS

@@ -1 +0,0 @@
-Subproject commit 70925aa394c0f24388f3cfb97f1c6ee1f91baf52

src/Conversions.cs

@@ -21,7 +21,7 @@ namespace MoonWorks
 			{ VertexElementFormat.NormalizedShort4, (uint) Marshal.SizeOf<NormalizedShort4>() },
 			{ VertexElementFormat.Short2, (uint) Marshal.SizeOf<Short2>() },
 			{ VertexElementFormat.Short4, (uint) Marshal.SizeOf<Short4>() },
-			{ VertexElementFormat.Uint, (uint) Marshal.SizeOf<uint>() },
+			{ VertexElementFormat.UInt, (uint) Marshal.SizeOf<uint>() },
 			{ VertexElementFormat.Vector2, (uint) Marshal.SizeOf<Math.Float.Vector2>() },
 			{ VertexElementFormat.Vector3, (uint) Marshal.SizeOf<Math.Float.Vector3>() },
 			{ VertexElementFormat.Vector4, (uint) Marshal.SizeOf<Math.Float.Vector4>() }
@@ -37,16 +37,6 @@ namespace MoonWorks
 			return b != 0;
 		}
 
-		public static int BoolToInt(bool b)
-		{
-			return b ? 1 : 0;
-		}
-
-		public static bool IntToBool(int b)
-		{
-			return b != 0;
-		}
-
 		public static uint VertexElementFormatSize(VertexElementFormat format)
 		{
 			return Sizes[format];

src/Game.cs

@@ -48,16 +48,15 @@ namespace MoonWorks
 		/// </summary>
 		/// <param name="windowCreateInfo">The parameters that will be used to create the MainWindow.</param>
 		/// <param name="frameLimiterSettings">The frame limiter settings.</param>
-		/// <param name="preferredBackends">Bitflags of which GPU backends to attempt to initialize.</param>
 		/// <param name="targetTimestep">How often Game.Update will run in terms of ticks per second.</param>
 		/// <param name="debugMode">If true, enables extra debug checks. Should be turned off for release builds.</param>
 		public Game(
 			WindowCreateInfo windowCreateInfo,
 			FrameLimiterSettings frameLimiterSettings,
-			BackendFlags preferredBackends,
 			int targetTimestep = 60,
 			bool debugMode = false
-		) {
+		)
+		{
 			Logger.LogInfo("Initializing frame limiter...");
 			Timestep = TimeSpan.FromTicks(TimeSpan.TicksPerSecond / targetTimestep);
 			gameTimer = Stopwatch.StartNew();
@@ -76,19 +75,21 @@ namespace MoonWorks
 				return;
 			}
 
+			Logger.Initialize();
+
 			Logger.LogInfo("Initializing input...");
 			Inputs = new Inputs();
 
 			Logger.LogInfo("Initializing graphics device...");
 			GraphicsDevice = new GraphicsDevice(
-				preferredBackends,
+				Backend.Vulkan,
 				debugMode
 			);
 
 			Logger.LogInfo("Initializing main window...");
 			MainWindow = new Window(windowCreateInfo, GraphicsDevice.WindowFlags | SDL.SDL_WindowFlags.SDL_WINDOW_HIDDEN);
 
-			if (!GraphicsDevice.ClaimWindow(MainWindow, windowCreateInfo.SwapchainComposition, windowCreateInfo.PresentMode))
+			if (!GraphicsDevice.ClaimWindow(MainWindow, windowCreateInfo.PresentMode))
 			{
 				throw new System.SystemException("Could not claim window!");
 			}

src/Graphics/Bindings/BufferBinding.cs

@@ -0,0 +1,17 @@
+namespace MoonWorks.Graphics
+{
+	/// <summary>
+	/// A buffer-offset pair to be used when binding vertex buffers.
+	/// </summary>
+	public struct BufferBinding
+	{
+		public Buffer Buffer;
+		public ulong Offset;
+
+		public BufferBinding(Buffer buffer, ulong offset)
+		{
+			Buffer = buffer;
+			Offset = offset;
+		}
+	}
+}

src/Graphics/Bindings/TextureSamplerBinding.cs

@@ -0,0 +1,17 @@
+namespace MoonWorks.Graphics
+{
+	/// <summary>
+	/// A texture-sampler pair to be used when binding samplers.
+	/// </summary>
+	public struct TextureSamplerBinding
+	{
+		public Texture Texture;
+		public Sampler Sampler;
+
+		public TextureSamplerBinding(Texture texture, Sampler sampler)
+		{
+			Texture = texture;
+			Sampler = sampler;
+		}
+	}
+}

src/Graphics/ComputePass.cs

@@ -1,213 +0,0 @@
-using System.Runtime.InteropServices;
-using SDL2;
-using SDL2_gpuCS;
-
-namespace MoonWorks.Graphics;
-
-public class ComputePass
-{
-	public nint Handle { get; private set; }
-
-	internal void SetHandle(nint handle)
-	{
-		Handle = handle;
-	}
-
-#if DEBUG
-	internal bool active;
-
-	ComputePipeline currentComputePipeline;
-#endif
-
-	/// <summary>
-	/// Binds a compute pipeline so that compute work may be dispatched.
-	/// </summary>
-	/// <param name="computePipeline">The compute pipeline to bind.</param>
-	public void BindComputePipeline(
-		ComputePipeline computePipeline
-	) {
-#if DEBUG
-		AssertComputePassActive();
-
-		// TODO: validate formats?
-#endif
-
-		SDL_Gpu.SDL_GpuBindComputePipeline(
-			Handle,
-			computePipeline.Handle
-		);
-
-#if DEBUG
-		currentComputePipeline = computePipeline;
-#endif
-	}
-
-	/// <summary>
-	/// Binds a texture to be used in the compute shader.
-	/// This texture must have been created with the ComputeShaderRead usage flag.
-	/// </summary>
-	public unsafe void BindStorageTexture(
-		in TextureSlice textureSlice,
-		uint slot = 0
-	) {
-#if DEBUG
-		AssertComputePassActive();
-		AssertComputePipelineBound();
-		AssertTextureNonNull(textureSlice.Texture);
-		AssertTextureHasComputeStorageReadFlag(textureSlice.Texture);
-#endif
-
-		var sdlTextureSlice = textureSlice.ToSDL();
-
-		SDL_Gpu.SDL_GpuBindComputeStorageTextures(
-			Handle,
-			slot,
-			&sdlTextureSlice,
-			1
-		);
-	}
-
-	/// <summary>
-	/// Binds a buffer to be used in the compute shader.
-	/// This buffer must have been created with the ComputeShaderRead usage flag.
-	/// </summary>
-	public unsafe void BindStorageBuffer(
-		GpuBuffer buffer,
-		uint slot = 0
-	) {
-#if DEBUG
-		AssertComputePassActive();
-		AssertComputePipelineBound();
-		AssertBufferNonNull(buffer);
-		AssertBufferHasComputeStorageReadFlag(buffer);
-#endif
-
-		var bufferHandle = buffer.Handle;
-
-		SDL_Gpu.SDL_GpuBindComputeStorageBuffers(
-			Handle,
-			slot,
-			&bufferHandle,
-			1
-		);
-	}
-
-	/// <summary>
-	/// Pushes compute shader uniform data.
-	/// Subsequent draw calls will use this uniform data.
-	/// </summary>
-	public unsafe void PushUniformData(
-		void* uniformsPtr,
-		uint size,
-		uint slot = 0
-	) {
-#if DEBUG
-		AssertComputePassActive();
-		AssertComputePipelineBound();
-
-		if (slot >= currentComputePipeline.ResourceInfo.UniformBufferCount)
-		{
-			throw new System.ArgumentException($"Slot {slot} given, but {currentComputePipeline.ResourceInfo.UniformBufferCount} uniform buffers are used on the shader!");
-		}
-#endif
-
-		SDL_Gpu.SDL_GpuPushComputeUniformData(
-			Handle,
-			slot,
-			(nint) uniformsPtr,
-			size
-		);
-	}
-
-	/// <summary>
-	/// Pushes compute shader uniform data.
-	/// Subsequent draw calls will use this uniform data.
-	/// </summary>
-	public unsafe void PushUniformData<T>(
-		in T uniforms,
-		uint slot = 0
-	) where T : unmanaged
-	{
-		fixed (T* uniformsPtr = &uniforms)
-		{
-			PushUniformData(uniformsPtr, (uint) Marshal.SizeOf<T>(), slot);
-		}
-	}
-
-
-	/// <summary>
-	/// Dispatches compute work.
-	/// </summary>
-	public void Dispatch(
-		uint groupCountX,
-		uint groupCountY,
-		uint groupCountZ
-	) {
-#if DEBUG
-		AssertComputePassActive();
-		AssertComputePipelineBound();
-
-		if (groupCountX < 1 || groupCountY < 1 || groupCountZ < 1)
-		{
-			throw new System.ArgumentException("All dimensions for the compute work groups must be >= 1!");
-		}
-#endif
-
-		SDL_Gpu.SDL_GpuDispatchCompute(
-			Handle,
-			groupCountX,
-			groupCountY,
-			groupCountZ
-		);
-	}
-
-#if DEBUG
-	private void AssertComputePassActive(string message = "Render pass is not active!")
-	{
-		if (!active)
-		{
-			throw new System.InvalidOperationException(message);
-		}
-	}
-
-	private void AssertComputePipelineBound(string message = "No compute pipeline is bound!")
-	{
-		if (currentComputePipeline == null)
-		{
-			throw new System.InvalidOperationException(message);
-		}
-	}
-
-	private void AssertTextureNonNull(in TextureSlice textureSlice)
-	{
-		if (textureSlice.Texture == null || textureSlice.Texture.Handle == nint.Zero)
-		{
-			throw new System.NullReferenceException("Texture must not be null!");
-		}
-	}
-
-	private void AssertTextureHasComputeStorageReadFlag(Texture texture)
-	{
-		if ((texture.UsageFlags & TextureUsageFlags.ComputeStorageRead) == 0)
-		{
-			throw new System.ArgumentException("The bound Texture's UsageFlags must include TextureUsageFlags.ComputeStorageRead!");
-		}
-	}
-
-	private void AssertBufferNonNull(GpuBuffer buffer)
-	{
-		if (buffer == null || buffer.Handle == nint.Zero)
-		{
-			throw new System.NullReferenceException("Buffer must not be null!");
-		}
-	}
-
-	private void AssertBufferHasComputeStorageReadFlag(GpuBuffer buffer)
-	{
-		if ((buffer.UsageFlags & BufferUsageFlags.ComputeStorageRead) == 0)
-		{
-			throw new System.ArgumentException("The bound Buffer's UsageFlags must include BufferUsageFlag.ComputeStorageRead!");
-		}
-	}
-#endif
-}

src/Graphics/ComputePassPool.cs

@@ -1,25 +0,0 @@
-using System.Collections.Concurrent;
-
-namespace MoonWorks.Graphics;
-
-internal class ComputePassPool
-{
-	private ConcurrentQueue<ComputePass> ComputePasses = new ConcurrentQueue<ComputePass>();
-
-	public ComputePass Obtain()
-	{
-		if (ComputePasses.TryDequeue(out var computePass))
-		{
-			return computePass;
-		}
-		else
-		{
-			return new ComputePass();
-		}
-	}
-
-	public void Return(ComputePass computePass)
-	{
-		ComputePasses.Enqueue(computePass);
-	}
-}

src/Graphics/CopyPass.cs

@@ -1,203 +0,0 @@
-using System.Runtime.InteropServices;
-using SDL2_gpuCS;
-
-namespace MoonWorks.Graphics;
-
-public class CopyPass
-{
-	public nint Handle { get; private set; }
-
-	internal void SetHandle(nint handle)
-	{
-		Handle = handle;
-	}
-
-	/// <summary>
-	/// Uploads data from a TransferBuffer to a TextureSlice.
-	/// This copy occurs on the GPU timeline.
-	///
-	/// Overwriting the contents of the TransferBuffer before the command buffer
-	/// has finished execution will cause undefined behavior.
-	///
-	/// You MAY assume that the copy has finished for subsequent commands.
-	/// </summary>
-	/// <param name="cycle">If true, cycles the texture if the given slice is bound.</param>
-	public void UploadToTexture(
-		TransferBuffer transferBuffer,
-		in TextureRegion textureRegion,
-		in BufferImageCopy copyParams,
-		bool cycle
-	) {
-#if DEBUG
-		AssertBufferBoundsCheck(transferBuffer.Size, copyParams.BufferOffset, textureRegion.Size);
-#endif
-
-		SDL_Gpu.SDL_GpuUploadToTexture(
-			Handle,
-			transferBuffer.Handle,
-			textureRegion.ToSDL(),
-			copyParams.ToSDL(),
-			Conversions.BoolToInt(cycle)
-		);
-	}
-
-	/// <summary>
-	/// Uploads the contents of an entire buffer to a 2D texture with no mips.
-	/// </summary>
-	public void UploadToTexture(
-		TransferBuffer transferBuffer,
-		Texture texture,
-		bool cycle
-	) {
-		UploadToTexture(
-			transferBuffer,
-			new TextureRegion(texture),
-			new BufferImageCopy(0, 0, 0),
-			cycle
-		);
-	}
-
-	/// <summary>
-	/// Uploads data from a TransferBuffer to a GpuBuffer.
-	/// This copy occurs on the GPU timeline.
-	///
-	/// Overwriting the contents of the TransferBuffer before the command buffer
-	/// has finished execution will cause undefined behavior.
-	///
-	/// You MAY assume that the copy has finished for subsequent commands.
-	/// </summary>
-	/// <param name="cycle">If true, cycles the buffer if it is bound.</param>
-	public void UploadToBuffer(
-		TransferBuffer transferBuffer,
-		GpuBuffer buffer,
-		in BufferCopy copyParams,
-		bool cycle
-	) {
-#if DEBUG
-		AssertBufferBoundsCheck(transferBuffer.Size, copyParams.SrcOffset, copyParams.Size);
-		AssertBufferBoundsCheck(buffer.Size, copyParams.DstOffset, copyParams.Size);
-#endif
-
-		SDL_Gpu.SDL_GpuUploadToBuffer(
-			Handle,
-			transferBuffer.Handle,
-			buffer.Handle,
-			copyParams.ToSDL(),
-			Conversions.BoolToInt(cycle)
-		);
-	}
-
-	/// <summary>
-	/// Copies the entire contents of a TransferBuffer to a GpuBuffer.
-	/// </summary>
-	public void UploadToBuffer(
-		TransferBuffer transferBuffer,
-		GpuBuffer buffer,
-		bool cycle
-	) {
-		UploadToBuffer(
-			transferBuffer,
-			buffer,
-			new BufferCopy(0, 0, transferBuffer.Size),
-			cycle
-		);
-	}
-
-	/// <summary>
-	/// Copies data element-wise into from a TransferBuffer to a GpuBuffer.
-	/// </summary>
-	public void UploadToBuffer<T>(
-		TransferBuffer transferBuffer,
-		GpuBuffer buffer,
-		uint sourceStartElement,
-		uint destinationStartElement,
-		uint numElements,
-		bool cycle
-	) where T : unmanaged
-	{
-		var elementSize = Marshal.SizeOf<T>();
-		var dataLengthInBytes = (uint) (elementSize * numElements);
-		var srcOffsetInBytes = (uint) (elementSize * sourceStartElement);
-		var dstOffsetInBytes = (uint) (elementSize * destinationStartElement);
-
-		UploadToBuffer(
-			transferBuffer,
-			buffer,
-			new BufferCopy(srcOffsetInBytes, dstOffsetInBytes, dataLengthInBytes),
-			cycle
-		);
-	}
-
-	/// <summary>
-	/// Copies the contents of a TextureRegion to another TextureRegion.
-	/// The regions must have the same dimensions.
-	/// This copy occurs on the GPU timeline.
-	///
-	/// You MAY assume that the copy has finished in subsequent commands.
-	/// </summary>
-	public void CopyTextureToTexture(
-		in TextureRegion source,
-		in TextureRegion destination,
-		bool cycle
-	) {
-#if DEBUG
-		AssertTextureBoundsCheck(destination.Size, source.Size);
-
-		if (source.Width != destination.Width || source.Height != destination.Height || source.Depth != destination.Depth)
-		{
-			throw new System.InvalidOperationException("Texture copy must have the same dimensions!");
-		}
-#endif
-
-		SDL_Gpu.SDL_GpuCopyTextureToTexture(
-			Handle,
-			source.ToSDL(),
-			destination.ToSDL(),
-			Conversions.BoolToInt(cycle)
-		);
-	}
-
-	/// <summary>
-	/// Copies data from a GpuBuffer to another GpuBuffer.
-	/// This copy occurs on the GPU timeline.
-	///
-	/// You MAY assume that the copy has finished in subsequent commands.
-	/// </summary>
-	public void CopyBufferToBuffer(
-		GpuBuffer source,
-		GpuBuffer destination,
-		in BufferCopy copyParams,
-		bool cycle
-	) {
-#if DEBUG
-		AssertBufferBoundsCheck(source.Size, copyParams.SrcOffset, copyParams.Size);
-		AssertBufferBoundsCheck(destination.Size, copyParams.DstOffset, copyParams.Size);
-#endif
-
-		SDL_Gpu.SDL_GpuCopyBufferToBuffer(
-			Handle,
-			source.Handle,
-			destination.Handle,
-			copyParams.ToSDL(),
-			Conversions.BoolToInt(cycle)
-		);
-	}
-
-#if DEBUG
-	private void AssertBufferBoundsCheck(uint bufferLengthInBytes, uint offsetInBytes, uint copyLengthInBytes)
-	{
-		if (copyLengthInBytes > bufferLengthInBytes + offsetInBytes)
-		{
-			throw new System.InvalidOperationException($"SetBufferData overflow! buffer length {bufferLengthInBytes}, offset {offsetInBytes}, copy length {copyLengthInBytes}");
-		}
-	}
-
-	private void AssertTextureBoundsCheck(uint textureSizeInBytes, uint dataLengthInBytes)
-	{
-		if (dataLengthInBytes > textureSizeInBytes)
-		{
-			throw new System.InvalidOperationException($"SetTextureData overflow! texture size {textureSizeInBytes}, data size {dataLengthInBytes}");
-		}
-	}
-#endif
-}

src/Graphics/CopyPassPool.cs

@@ -1,25 +0,0 @@
-using System.Collections.Concurrent;
-
-namespace MoonWorks.Graphics;
-
-internal class CopyPassPool
-{
-	private ConcurrentQueue<CopyPass> CopyPasses = new ConcurrentQueue<CopyPass>();
-
-	public CopyPass Obtain()
-	{
-		if (CopyPasses.TryDequeue(out var copyPass))
-		{
-			return copyPass;
-		}
-		else
-		{
-			return new CopyPass();
-		}
-	}
-
-	public void Return(CopyPass copyPass)
-	{
-		CopyPasses.Enqueue(copyPass);
-	}
-}

src/Graphics/Font/Font.cs

@@ -47,13 +47,7 @@ namespace MoonWorks.Graphics.Font
 				out float distanceRange
 			);
 
-			var imagePath = Path.ChangeExtension(fontPath, ".png");
+			var texture = Texture.FromImageFile(graphicsDevice, commandBuffer, Path.ChangeExtension(fontPath, ".png"));
-			ImageUtils.ImageInfoFromFile(imagePath, out var width, out var height, out var sizeInBytes);
-
-			var uploader = new ResourceUploader(graphicsDevice);
-			var texture = uploader.CreateTexture2DFromCompressed(imagePath);
-			uploader.Upload();
-			uploader.Dispose();
 
 			NativeMemory.Free(fontFileByteBuffer);
 			NativeMemory.Free(atlasFileByteBuffer);

src/Graphics/Font/TextBatch.cs

@@ -13,12 +13,10 @@ namespace MoonWorks.Graphics.Font
 		private GraphicsDevice GraphicsDevice { get; }
 		public IntPtr Handle { get; }
 
-		public GpuBuffer VertexBuffer { get; protected set; } = null;
+		public Buffer VertexBuffer { get; protected set; } = null;
-		public GpuBuffer IndexBuffer { get; protected set; } = null;
+		public Buffer IndexBuffer { get; protected set; } = null;
 		public uint PrimitiveCount { get; protected set; }
 
-		private TransferBuffer TransferBuffer;
-
 		public Font CurrentFont { get; private set; }
 
 		private byte* StringBytes;
@@ -32,10 +30,8 @@ namespace MoonWorks.Graphics.Font
 			StringBytesLength = 128;
 			StringBytes = (byte*) NativeMemory.Alloc((nuint) StringBytesLength);
 
-			VertexBuffer = GpuBuffer.Create<Vertex>(GraphicsDevice, BufferUsageFlags.Vertex, INITIAL_VERTEX_COUNT);
+			VertexBuffer = Buffer.Create<Vertex>(GraphicsDevice, BufferUsageFlags.Vertex, INITIAL_VERTEX_COUNT);
-			IndexBuffer = GpuBuffer.Create<uint>(GraphicsDevice, BufferUsageFlags.Index, INITIAL_INDEX_COUNT);
+			IndexBuffer = Buffer.Create<uint>(GraphicsDevice, BufferUsageFlags.Index, INITIAL_INDEX_COUNT);
-
-			TransferBuffer = TransferBuffer.Create<byte>(GraphicsDevice, TransferUsage.Buffer, VertexBuffer.Size + IndexBuffer.Size);
 		}
 
 		// Call this to initialize or reset the batch.
@@ -97,40 +93,22 @@ namespace MoonWorks.Graphics.Font
 				out uint indexDataLengthInBytes
 			);
 
-			var vertexSpan = new Span<byte>((void*) vertexDataPointer, (int) vertexDataLengthInBytes);
-			var indexSpan = new Span<byte>((void*) indexDataPointer, (int) indexDataLengthInBytes);
-
-			var newTransferBufferNeeded = false;
-
 			if (VertexBuffer.Size < vertexDataLengthInBytes)
 			{
 				VertexBuffer.Dispose();
-				VertexBuffer = new GpuBuffer(GraphicsDevice, BufferUsageFlags.Vertex, vertexDataLengthInBytes);
+				VertexBuffer = new Buffer(GraphicsDevice, BufferUsageFlags.Vertex, vertexDataLengthInBytes);
-				newTransferBufferNeeded = true;
 			}
 
 			if (IndexBuffer.Size < indexDataLengthInBytes)
 			{
 				IndexBuffer.Dispose();
-				IndexBuffer = new GpuBuffer(GraphicsDevice, BufferUsageFlags.Index, vertexDataLengthInBytes);
+				IndexBuffer = new Buffer(GraphicsDevice, BufferUsageFlags.Index, vertexDataLengthInBytes);
-				newTransferBufferNeeded = true;
-			}
-
-			if (newTransferBufferNeeded)
-			{
-				TransferBuffer.Dispose();
-				TransferBuffer = new TransferBuffer(GraphicsDevice, TransferUsage.Buffer, VertexBuffer.Size + IndexBuffer.Size);
 			}
 
 			if (vertexDataLengthInBytes > 0 && indexDataLengthInBytes > 0)
 			{
-				TransferBuffer.SetData(vertexSpan, TransferOptions.Cycle);
+				commandBuffer.SetBufferData(VertexBuffer, vertexDataPointer, 0, vertexDataLengthInBytes);
-				TransferBuffer.SetData(indexSpan, (uint) vertexSpan.Length, TransferOptions.Unsafe);
+				commandBuffer.SetBufferData(IndexBuffer, indexDataPointer, 0, indexDataLengthInBytes);
-
-				commandBuffer.BeginCopyPass();
-				commandBuffer.UploadToBuffer(TransferBuffer, VertexBuffer, new BufferCopy(0, 0, (uint) vertexSpan.Length), WriteOptions.Cycle);
-				commandBuffer.UploadToBuffer(TransferBuffer, IndexBuffer, new BufferCopy((uint) vertexSpan.Length, 0, (uint) indexSpan.Length), WriteOptions.Cycle);
-				commandBuffer.EndCopyPass();
 			}
 
 			PrimitiveCount = vertexCount / 2;
@@ -145,12 +123,12 @@ namespace MoonWorks.Graphics.Font
 			));
 			commandBuffer.BindVertexBuffers(VertexBuffer);
 			commandBuffer.BindIndexBuffer(IndexBuffer, IndexElementSize.ThirtyTwo);
-			commandBuffer.PushVertexShaderUniforms(transformMatrix);
-			commandBuffer.PushFragmentShaderUniforms(CurrentFont.DistanceRange);
 			commandBuffer.DrawIndexedPrimitives(
 				0,
 				0,
-				PrimitiveCount
+				PrimitiveCount,
+				commandBuffer.PushVertexShaderUniforms(transformMatrix),
+				commandBuffer.PushFragmentShaderUniforms(CurrentFont.DistanceRange)
 			);
 		}
 

src/Graphics/GraphicsDevice.cs

@@ -3,8 +3,8 @@ using System.Collections.Generic;
 using System.IO;
 using System.Runtime.InteropServices;
 using MoonWorks.Video;
-using SDL2;
+using RefreshCS;
-using SDL2_gpuCS;
+using WellspringCS;
 
 namespace MoonWorks.Graphics
 {
@@ -14,8 +14,7 @@ namespace MoonWorks.Graphics
 	public class GraphicsDevice : IDisposable
 	{
 		public IntPtr Handle { get; }
-		public BackendFlags Backend { get; }
+		public Backend Backend { get; }
-		public bool DebugMode { get; }
 
 		private uint windowFlags;
 		public SDL2.SDL.SDL_WindowFlags WindowFlags => (SDL2.SDL.SDL_WindowFlags) windowFlags;
@@ -24,10 +23,8 @@ namespace MoonWorks.Graphics
 		internal GraphicsPipeline VideoPipeline { get; }
 
 		// Built-in text shader info
-		public Shader TextVertexShader;
+		public GraphicsShaderInfo TextVertexShaderInfo { get; }
-		public Shader TextFragmentShader;
+		public GraphicsShaderInfo TextFragmentShaderInfo { get; }
-		public GraphicsPipelineResourceInfo TextVertexShaderInfo { get; }
-		public GraphicsPipelineResourceInfo TextFragmentShaderInfo { get; }
 		public VertexInputState TextVertexInputState { get; }
 
 		// Built-in samplers
@@ -37,115 +34,62 @@ namespace MoonWorks.Graphics
 		public bool IsDisposed { get; private set; }
 
 		private readonly HashSet<GCHandle> resources = new HashSet<GCHandle>();
-		private CommandBufferPool CommandBufferPool;
 		private FencePool FencePool;
-		internal RenderPassPool RenderPassPool;
+		private CommandBufferPool CommandBufferPool;
-		internal ComputePassPool ComputePassPool;
-		internal CopyPassPool CopyPassPool;
 
-		internal unsafe GraphicsDevice(
+		internal GraphicsDevice(
-			BackendFlags preferredBackends,
+			Backend preferredBackend,
 			bool debugMode
 		) {
-			if (preferredBackends == BackendFlags.Invalid)
+			Backend = (Backend) Refresh.Refresh_SelectBackend((Refresh.Backend) preferredBackend, out windowFlags);
+
+			if (Backend == Backend.Invalid)
 			{
 				throw new System.Exception("Could not set graphics backend!");
 			}
 
-			Handle = SDL_Gpu.SDL_GpuCreateDevice(
+			Handle = Refresh.Refresh_CreateDevice(
-				(SDL_Gpu.BackendFlags) preferredBackends,
 				Conversions.BoolToByte(debugMode)
 			);
 
-			DebugMode = debugMode;
 			// TODO: check for CreateDevice fail
 
-			Backend = (BackendFlags) SDL_Gpu.SDL_GpuGetBackend(Handle);
-
 			// Check for replacement stock shaders
 			string basePath = System.AppContext.BaseDirectory;
 
-			string fullscreenVertPath = Path.Combine(basePath, "fullscreen.vert.refresh");
+			string videoVertPath = Path.Combine(basePath, "video_fullscreen.vert.refresh");
+			string videoFragPath = Path.Combine(basePath, "video_yuv2rgba.frag.refresh");
 
 			string textVertPath = Path.Combine(basePath, "text_transform.vert.refresh");
 			string textFragPath = Path.Combine(basePath, "text_msdf.frag.refresh");
 
-			string videoFragPath = Path.Combine(basePath, "video_yuv2rgba.frag.refresh");
+			ShaderModule videoVertShader;
-			string blitFragPath = Path.Combine(basePath, "blit.frag.refresh");
+			ShaderModule videoFragShader;
 
-			Shader fullscreenVertShader;
+			ShaderModule textVertShader;
+			ShaderModule textFragShader;
 
-			Shader textVertShader;
+			if (File.Exists(videoVertPath) && File.Exists(videoFragPath))
-			Shader textFragShader;
-
-			Shader videoFragShader;
-			Shader blitFragShader;
-
-			if (File.Exists(fullscreenVertPath))
 			{
-				fullscreenVertShader = new Shader(
+				videoVertShader = new ShaderModule(this, videoVertPath);
-					this,
+				videoFragShader = new ShaderModule(this, videoFragPath);
-					fullscreenVertPath,
-					"main",
-					ShaderStage.Vertex,
-					ShaderFormat.SECRET
-				);
 			}
 			else
 			{
 				// use defaults
 				var assembly = typeof(GraphicsDevice).Assembly;
-				using var vertStream = assembly.GetManifestResourceStream("MoonWorks.Graphics.StockShaders.Fullscreen.vert.refresh");
-				fullscreenVertShader = new Shader(
-					this,
-					vertStream,
-					"main",
-					ShaderStage.Vertex,
-					ShaderFormat.SPIRV
-				);
-			}
 
-			if (File.Exists(videoFragPath))
+				using var vertStream = assembly.GetManifestResourceStream("MoonWorks.Graphics.StockShaders.VideoFullscreen.vert.refresh");
-			{
-				videoFragShader = new Shader(
-					this,
-					videoFragPath,
-					"main",
-					ShaderStage.Fragment,
-					ShaderFormat.SECRET
-				);
-			}
-			else
-			{
-				// use defaults
-				var assembly = typeof(GraphicsDevice).Assembly;
 				using var fragStream = assembly.GetManifestResourceStream("MoonWorks.Graphics.StockShaders.VideoYUV2RGBA.frag.refresh");
-				videoFragShader = new Shader(
+
-					this,
+				videoVertShader = new ShaderModule(this, vertStream);
-					fragStream,
+				videoFragShader = new ShaderModule(this, fragStream);
-					"main",
-					ShaderStage.Fragment,
-					ShaderFormat.SPIRV
-				);
 			}
 
 			if (File.Exists(textVertPath) && File.Exists(textFragPath))
 			{
-				textVertShader = new Shader(
+				textVertShader = new ShaderModule(this, textVertPath);
-					this,
+				textFragShader = new ShaderModule(this, textFragPath);
-					textVertPath,
-					"main",
-					ShaderStage.Vertex,
-					ShaderFormat.SECRET
-				);
-
-				textFragShader = new Shader(
-					this,
-					textFragPath,
-					"main",
-					ShaderStage.Fragment,
-					ShaderFormat.SECRET
-				);
 			}
 			else
 			{
@@ -155,46 +99,8 @@ namespace MoonWorks.Graphics
 				using var vertStream = assembly.GetManifestResourceStream("MoonWorks.Graphics.StockShaders.TextTransform.vert.refresh");
 				using var fragStream = assembly.GetManifestResourceStream("MoonWorks.Graphics.StockShaders.TextMSDF.frag.refresh");
 
-				textVertShader = new Shader(
+				textVertShader = new ShaderModule(this, vertStream);
-					this,
+				textFragShader = new ShaderModule(this, fragStream);
-					vertStream,
-					"main",
-					ShaderStage.Fragment,
-					ShaderFormat.SPIRV
-				);
-
-				textFragShader = new Shader(
-					this,
-					fragStream,
-					"main",
-					ShaderStage.Fragment,
-					ShaderFormat.SPIRV
-				);
-			}
-
-			if (File.Exists(blitFragPath))
-			{
-				blitFragShader = new Shader(
-					this,
-					blitFragPath,
-					"main",
-					ShaderStage.Fragment,
-					ShaderFormat.SECRET
-				);
-			}
-			else
-			{
-				// use defaults
-				var assembly = typeof(GraphicsDevice).Assembly;
-
-				using var fragStream = assembly.GetManifestResourceStream("MoonWorks.Graphics.StockShaders.Blit.frag.refresh");
-				blitFragShader = new Shader(
-					this,
-					fragStream,
-					"main",
-					ShaderStage.Fragment,
-					ShaderFormat.SPIRV
-				);
 			}
 
 			VideoPipeline = new GraphicsPipeline(
@@ -208,12 +114,16 @@ namespace MoonWorks.Graphics
 						)
 					),
 					DepthStencilState = DepthStencilState.Disable,
-					VertexShader = fullscreenVertShader,
+					VertexShaderInfo = GraphicsShaderInfo.Create(
-					FragmentShader = videoFragShader,
+						videoVertShader,
-					FragmentShaderResourceInfo = new GraphicsPipelineResourceInfo
+						"main",
-					{
+						0
-						SamplerCount = 3
+					),
-					},
+					FragmentShaderInfo = GraphicsShaderInfo.Create(
+						videoFragShader,
+						"main",
+						3
+					),
 					VertexInputState = VertexInputState.Empty,
 					RasterizerState = RasterizerState.CCW_CullNone,
 					PrimitiveType = PrimitiveType.TriangleList,
@@ -221,15 +131,8 @@ namespace MoonWorks.Graphics
 				}
 			);
 
-			TextVertexShader = textVertShader;
+			TextVertexShaderInfo = GraphicsShaderInfo.Create<Math.Float.Matrix4x4>(textVertShader, "main", 0);
-			TextVertexShaderInfo = new GraphicsPipelineResourceInfo();
+			TextFragmentShaderInfo = GraphicsShaderInfo.Create<float>(textFragShader, "main", 1);
-
-			TextFragmentShader = textFragShader;
-			TextFragmentShaderInfo = new GraphicsPipelineResourceInfo
-			{
-				SamplerCount = 1
-			};
-
 			TextVertexInputState = VertexInputState.CreateSingleBinding<Font.Vertex>();
 
 			PointSampler = new Sampler(this, SamplerCreateInfo.PointClamp);
@@ -242,35 +145,28 @@ namespace MoonWorks.Graphics
 		/// <summary>
 		/// Prepares a window so that frames can be presented to it.
 		/// </summary>
-		/// <param name="swapchainComposition">The desired composition of the swapchain. Ignore this unless you are using HDR or tonemapping.</param>
 		/// <param name="presentMode">The desired presentation mode for the window. Roughly equivalent to V-Sync.</param>
 		/// <returns>True if successfully claimed.</returns>
-		public bool ClaimWindow(
+		public bool ClaimWindow(Window window, PresentMode presentMode)
-			Window window,
+		{
-			SwapchainComposition swapchainComposition,
-			PresentMode presentMode
-		) {
 			if (window.Claimed)
 			{
 				Logger.LogError("Window already claimed!");
 				return false;
 			}
 
-			var success = Conversions.IntToBool(
+			var success = Conversions.ByteToBool(
-				SDL_Gpu.SDL_GpuClaimWindow(
+				Refresh.Refresh_ClaimWindow(
 					Handle,
 					window.Handle,
-					(SDL_Gpu.SwapchainComposition) swapchainComposition,
+					(Refresh.PresentMode) presentMode
-					(SDL_Gpu.PresentMode) presentMode
 				)
 			);
 
 			if (success)
 			{
 				window.Claimed = true;
-				window.SwapchainComposition = swapchainComposition;
 				window.SwapchainFormat = GetSwapchainFormat(window);
-
 				if (window.SwapchainTexture == null)
 				{
 					window.SwapchainTexture = new Texture(this, window.SwapchainFormat);
@@ -287,7 +183,7 @@ namespace MoonWorks.Graphics
 		{
 			if (window.Claimed)
 			{
-				SDL_Gpu.SDL_GpuUnclaimWindow(
+				Refresh.Refresh_UnclaimWindow(
 					Handle,
 					window.Handle
 				);
@@ -305,22 +201,18 @@ namespace MoonWorks.Graphics
 		/// </summary>
 		/// <param name="window"></param>
 		/// <param name="presentMode"></param>
-		public void SetSwapchainParameters(
+		public void SetPresentMode(Window window, PresentMode presentMode)
-			Window window,
+		{
-			SwapchainComposition swapchainComposition,
-			PresentMode presentMode
-		) {
 			if (!window.Claimed)
 			{
 				Logger.LogError("Cannot set present mode on unclaimed window!");
 				return;
 			}
 
-			SDL_Gpu.SDL_GpuSetSwapchainParameters(
+			Refresh.Refresh_SetSwapchainPresentMode(
 				Handle,
 				window.Handle,
-				(SDL_Gpu.SwapchainComposition) swapchainComposition,
+				(Refresh.PresentMode) presentMode
-				(SDL_Gpu.PresentMode) presentMode
 			);
 		}
 
@@ -332,7 +224,7 @@ namespace MoonWorks.Graphics
 		public CommandBuffer AcquireCommandBuffer()
 		{
 			var commandBuffer = CommandBufferPool.Obtain();
-			commandBuffer.SetHandle(SDL_Gpu.SDL_GpuAcquireCommandBuffer(Handle));
+			commandBuffer.SetHandle(Refresh.Refresh_AcquireCommandBuffer(Handle));
 #if DEBUG
 			commandBuffer.ResetStateTracking();
 #endif
@@ -351,7 +243,8 @@ namespace MoonWorks.Graphics
 			}
 #endif
 
-			SDL_Gpu.SDL_GpuSubmit(
+			Refresh.Refresh_Submit(
+				Handle,
 				commandBuffer.Handle
 			);
 
@@ -368,7 +261,8 @@ namespace MoonWorks.Graphics
 		/// <returns></returns>
 		public Fence SubmitAndAcquireFence(CommandBuffer commandBuffer)
 		{
-			var fenceHandle = SDL_Gpu.SDL_GpuSubmitAndAcquireFence(
+			var fenceHandle = Refresh.Refresh_SubmitAndAcquireFence(
+				Handle,
 				commandBuffer.Handle
 			);
 
@@ -383,7 +277,7 @@ namespace MoonWorks.Graphics
 		/// </summary>
 		public void Wait()
 		{
-			SDL_Gpu.SDL_GpuWait(Handle);
+			Refresh.Refresh_Wait(Handle);
 		}
 
 		/// <summary>
@@ -391,13 +285,14 @@ namespace MoonWorks.Graphics
 		/// </summary>
 		public unsafe void WaitForFences(Fence fence)
 		{
-			var fenceHandle = fence.Handle;
+			var handlePtr = stackalloc nint[1];
+			handlePtr[0] = fence.Handle;
 
-			SDL_Gpu.SDL_GpuWaitForFences(
+			Refresh.Refresh_WaitForFences(
 				Handle,
 				1,
 				1,
-				&fenceHandle
+				(nint) handlePtr
 			);
 		}
 
@@ -414,11 +309,11 @@ namespace MoonWorks.Graphics
 			handlePtr[0] = fenceOne.Handle;
 			handlePtr[1] = fenceTwo.Handle;
 
-			SDL_Gpu.SDL_GpuWaitForFences(
+			Refresh.Refresh_WaitForFences(
 				Handle,
-				Conversions.BoolToInt(waitAll),
+				Conversions.BoolToByte(waitAll),
 				2,
-				handlePtr
+				(nint) handlePtr
 			);
 		}
 
@@ -437,11 +332,11 @@ namespace MoonWorks.Graphics
 			handlePtr[1] = fenceTwo.Handle;
 			handlePtr[2] = fenceThree.Handle;
 
-			SDL_Gpu.SDL_GpuWaitForFences(
+			Refresh.Refresh_WaitForFences(
 				Handle,
-				Conversions.BoolToInt(waitAll),
+				Conversions.BoolToByte(waitAll),
 				3,
-				handlePtr
+				(nint) handlePtr
 			);
 		}
 
@@ -462,11 +357,11 @@ namespace MoonWorks.Graphics
 			handlePtr[2] = fenceThree.Handle;
 			handlePtr[3] = fenceFour.Handle;
 
-			SDL_Gpu.SDL_GpuWaitForFences(
+			Refresh.Refresh_WaitForFences(
 				Handle,
-				Conversions.BoolToInt(waitAll),
+				Conversions.BoolToByte(waitAll),
 				4,
-				handlePtr
+				(nint) handlePtr
 			);
 		}
 
@@ -474,7 +369,7 @@ namespace MoonWorks.Graphics
 		/// Wait for one or more fences to become signaled.
 		/// </summary>
 		/// <param name="waitAll">If true, will wait for all given fences to be signaled.</param>
-		public unsafe void WaitForFences(Span<Fence> fences, bool waitAll)
+		public unsafe void WaitForFences(Fence[] fences, bool waitAll)
 		{
 			var handlePtr = stackalloc nint[fences.Length];
 
@@ -483,11 +378,11 @@ namespace MoonWorks.Graphics
 				handlePtr[i] = fences[i].Handle;
 			}
 
-			SDL_Gpu.SDL_GpuWaitForFences(
+			Refresh.Refresh_WaitForFences(
 				Handle,
-				Conversions.BoolToInt(waitAll),
+				Conversions.BoolToByte(waitAll),
 				4,
-				handlePtr
+				(nint) handlePtr
 			);
 		}
 
@@ -497,7 +392,7 @@ namespace MoonWorks.Graphics
 		/// <exception cref="InvalidOperationException">Throws if the fence query indicates that the graphics device has been lost.</exception>
 		public bool QueryFence(Fence fence)
 		{
-			var result = SDL_Gpu.SDL_GpuQueryFence(Handle, fence.Handle);
+			var result = Refresh.Refresh_QueryFence(Handle, fence.Handle);
 
 			if (result < 0)
 			{
@@ -512,19 +407,14 @@ namespace MoonWorks.Graphics
 		/// </summary>
 		public void ReleaseFence(Fence fence)
 		{
-			SDL_Gpu.SDL_GpuReleaseFence(Handle, fence.Handle);
+			Refresh.Refresh_ReleaseFence(Handle, fence.Handle);
 			fence.Handle = IntPtr.Zero;
 			FencePool.Return(fence);
 		}
 
 		private TextureFormat GetSwapchainFormat(Window window)
 		{
-			if (!window.Claimed)
+			return (TextureFormat) Refresh.Refresh_GetSwapchainFormat(Handle, window.Handle);
-			{
-				throw new System.ArgumentException("Cannot get swapchain format of unclaimed window!");
-			}
-
-			return (TextureFormat) SDL_Gpu.SDL_GpuGetSwapchainTextureFormat(Handle, window.Handle);
 		}
 
 		internal void AddResourceReference(GCHandle resourceReference)
@@ -572,7 +462,7 @@ namespace MoonWorks.Graphics
 					}
 				}
 
-				SDL_Gpu.SDL_GpuDestroyDevice(Handle);
+				Refresh.Refresh_DestroyDevice(Handle);
 
 				IsDisposed = true;
 			}

src/Graphics/ImageUtils.cs

@@ -1,457 +0,0 @@
-using System;
-using System.IO;
-using System.Runtime.InteropServices;
-using RefreshCS;
-using SDL2;
-
-namespace MoonWorks.Graphics
-{
-	public static class ImageUtils
-	{
-		/// <summary>
-		/// Gets pointer to pixel data from compressed image byte data.
-		///
-		/// The returned pointer must be freed by calling FreePixelData.
-		/// </summary>
-		public static unsafe IntPtr GetPixelDataFromBytes(
-			Span<byte> data,
-			out uint width,
-			out uint height,
-			out uint sizeInBytes
-		) {
-			fixed (byte* ptr = data)
-			{
-				var pixelData =
-					Refresh.Refresh_Image_Load(
-					(nint) ptr,
-					data.Length,
-					out var w,
-					out var h,
-					out var len
-				);
-
-				width = (uint) w;
-				height = (uint) h;
-				sizeInBytes = (uint) len;
-
-				return pixelData;
-			}
-		}
-
-		/// <summary>
-		/// Gets pointer to pixel data from a compressed image stream.
-		///
-		/// The returned pointer must be freed by calling FreePixelData.
-		/// </summary>
-		public static unsafe IntPtr GetPixelDataFromStream(
-			Stream stream,
-			out uint width,
-			out uint height,
-			out uint sizeInBytes
-		) {
-			var length = stream.Length;
-			var buffer = NativeMemory.Alloc((nuint) length);
-			var span = new Span<byte>(buffer, (int) length);
-			stream.ReadExactly(span);
-
-			var pixelData = GetPixelDataFromBytes(span, out width, out height, out sizeInBytes);
-
-			NativeMemory.Free(buffer);
-
-			return pixelData;
-		}
-
-		/// <summary>
-		/// Gets pointer to pixel data from a compressed image file.
-		///
-		/// The returned pointer must be freed by calling FreePixelData.
-		/// </summary>
-		public static IntPtr GetPixelDataFromFile(
-			string path,
-			out uint width,
-			out uint height,
-			out uint sizeInBytes
-		) {
-			var fileStream = new FileStream(path, FileMode.Open, FileAccess.Read);
-			return GetPixelDataFromStream(fileStream, out width, out height, out sizeInBytes);
-		}
-
-		/// <summary>
-		/// Get metadata from compressed image bytes.
-		/// </summary>
-		public static unsafe bool ImageInfoFromBytes(
-			Span<byte> data,
-			out uint width,
-			out uint height,
-			out uint sizeInBytes
-		) {
-			fixed (byte* ptr = data)
-			{
-				var result =
-					Refresh.Refresh_Image_Info(
-					(nint) ptr,
-					data.Length,
-					out var w,
-					out var h,
-					out var len
-				);
-
-				width = (uint) w;
-				height = (uint) h;
-				sizeInBytes = (uint) len;
-
-				return Conversions.ByteToBool(result);
-			}
-		}
-
-		/// <summary>
-		/// Get metadata from a compressed image stream.
-		/// </summary>
-		public static unsafe bool ImageInfoFromStream(
-			Stream stream,
-			out uint width,
-			out uint height,
-			out uint sizeInBytes
-		) {
-			var length = stream.Length;
-			var buffer = NativeMemory.Alloc((nuint) length);
-			var span = new Span<byte>(buffer, (int) length);
-			stream.ReadExactly(span);
-
-			var result = ImageInfoFromBytes(span, out width, out height, out sizeInBytes);
-
-			NativeMemory.Free(buffer);
-
-			return result;
-		}
-
-		/// <summary>
-		/// Get metadata from a compressed image file.
-		/// </summary>
-		public static bool ImageInfoFromFile(
-			string path,
-			out uint width,
-			out uint height,
-			out uint sizeInBytes
-		) {
-			var fileStream = new FileStream(path, FileMode.Open, FileAccess.Read);
-			return ImageInfoFromStream(fileStream, out width, out height, out sizeInBytes);
-		}
-
-		/// <summary>
-		/// Frees pixel data obtained from GetPixelData methods.
-		/// </summary>
-		public static void FreePixelData(IntPtr pixels)
-		{
-			Refresh.Refresh_Image_Free(pixels);
-		}
-
-		/// <summary>
-		/// Saves pixel data contained in a TransferBuffer to a PNG file.
-		/// </summary>
-		public static unsafe void SavePNG(
-			string path,
-			TransferBuffer transferBuffer,
-			uint bufferOffsetInBytes,
-			int width,
-			int height,
-			bool bgra
-		) {
-			var sizeInBytes = width * height * 4;
-
-			var pixelsPtr = NativeMemory.Alloc((nuint) sizeInBytes);
-			var pixelsSpan = new Span<byte>(pixelsPtr, sizeInBytes);
-
-			transferBuffer.GetData(pixelsSpan, bufferOffsetInBytes);
-
-			if (bgra)
-			{
-				// if data is bgra, we have to swap the R and B channels
-				var rgbaPtr = NativeMemory.Alloc((nuint) sizeInBytes);
-				var rgbaSpan = new Span<byte>(rgbaPtr, sizeInBytes);
-
-				for (var i = 0; i < sizeInBytes; i += 4)
-				{
-					rgbaSpan[i] = pixelsSpan[i + 2];
-					rgbaSpan[i + 1] = pixelsSpan[i + 1];
-					rgbaSpan[i + 2] = pixelsSpan[i];
-					rgbaSpan[i + 3] = pixelsSpan[i + 3];
-				}
-
-				NativeMemory.Free(pixelsPtr);
-				pixelsPtr = rgbaPtr;
-			}
-
-			Refresh.Refresh_Image_SavePNG(path, (nint) pixelsPtr, width, height);
-			NativeMemory.Free(pixelsPtr);
-		}
-
-		// DDS loading extension, based on MojoDDS
-		// Taken from https://github.com/FNA-XNA/FNA/blob/1e49f868f595f62bc6385db45949a03186a7cd7f/src/Graphics/Texture.cs#L194
-		public static void ParseDDS(
-			BinaryReader reader,
-			out TextureFormat format,
-			out int width,
-			out int height,
-			out int levels,
-			out bool isCube
-		) {
-			// A whole bunch of magic numbers, yay DDS!
-			const uint DDS_MAGIC = 0x20534444;
-			const uint DDS_HEADERSIZE = 124;
-			const uint DDS_PIXFMTSIZE = 32;
-			const uint DDSD_HEIGHT = 0x2;
-			const uint DDSD_WIDTH = 0x4;
-			const uint DDSD_PITCH = 0x8;
-			const uint DDSD_LINEARSIZE = 0x80000;
-			const uint DDSD_REQ = (
-				DDSD_HEIGHT | DDSD_WIDTH
-			);
-			const uint DDSCAPS_MIPMAP = 0x400000;
-			const uint DDSCAPS_TEXTURE = 0x1000;
-			const uint DDSCAPS2_CUBEMAP = 0x200;
-			const uint DDPF_FOURCC = 0x4;
-			const uint DDPF_RGB = 0x40;
-			const uint FOURCC_DXT1 = 0x31545844;
-			const uint FOURCC_DXT3 = 0x33545844;
-			const uint FOURCC_DXT5 = 0x35545844;
-			const uint FOURCC_DX10 = 0x30315844;
-			const uint pitchAndLinear = (
-				DDSD_PITCH | DDSD_LINEARSIZE
-			);
-
-			// File should start with 'DDS '
-			if (reader.ReadUInt32() != DDS_MAGIC)
-			{
-				throw new NotSupportedException("Not a DDS!");
-			}
-
-			// Texture info
-			uint size = reader.ReadUInt32();
-			if (size != DDS_HEADERSIZE)
-			{
-				throw new NotSupportedException("Invalid DDS header!");
-			}
-			uint flags = reader.ReadUInt32();
-			if ((flags & DDSD_REQ) != DDSD_REQ)
-			{
-				throw new NotSupportedException("Invalid DDS flags!");
-			}
-			if ((flags & pitchAndLinear) == pitchAndLinear)
-			{
-				throw new NotSupportedException("Invalid DDS flags!");
-			}
-			height = reader.ReadInt32();
-			width = reader.ReadInt32();
-			reader.ReadUInt32(); // dwPitchOrLinearSize, unused
-			reader.ReadUInt32(); // dwDepth, unused
-			levels = reader.ReadInt32();
-
-			// "Reserved"
-			reader.ReadBytes(4 * 11);
-
-			// Format info
-			uint formatSize = reader.ReadUInt32();
-			if (formatSize != DDS_PIXFMTSIZE)
-			{
-				throw new NotSupportedException("Bogus PIXFMTSIZE!");
-			}
-			uint formatFlags = reader.ReadUInt32();
-			uint formatFourCC = reader.ReadUInt32();
-			uint formatRGBBitCount = reader.ReadUInt32();
-			uint formatRBitMask = reader.ReadUInt32();
-			uint formatGBitMask = reader.ReadUInt32();
-			uint formatBBitMask = reader.ReadUInt32();
-			uint formatABitMask = reader.ReadUInt32();
-
-			// dwCaps "stuff"
-			uint caps = reader.ReadUInt32();
-			if ((caps & DDSCAPS_TEXTURE) == 0)
-			{
-				throw new NotSupportedException("Not a texture!");
-			}
-
-			isCube = false;
-
-			uint caps2 = reader.ReadUInt32();
-			if (caps2 != 0)
-			{
-				if ((caps2 & DDSCAPS2_CUBEMAP) == DDSCAPS2_CUBEMAP)
-				{
-					isCube = true;
-				}
-				else
-				{
-					throw new NotSupportedException("Invalid caps2!");
-				}
-			}
-
-			reader.ReadUInt32(); // dwCaps3, unused
-			reader.ReadUInt32(); // dwCaps4, unused
-
-			// "Reserved"
-			reader.ReadUInt32();
-
-			// Mipmap sanity check
-			if ((caps & DDSCAPS_MIPMAP) != DDSCAPS_MIPMAP)
-			{
-				levels = 1;
-			}
-
-			// Determine texture format
-			if ((formatFlags & DDPF_FOURCC) == DDPF_FOURCC)
-			{
-				switch (formatFourCC)
-				{
-					case 0x71: // D3DFMT_A16B16G16R16F
-						format = TextureFormat.R16G16B16A16_SFLOAT;
-						break;
-					case 0x74: // D3DFMT_A32B32G32R32F
-						format = TextureFormat.R32G32B32A32_SFLOAT;
-						break;
-					case FOURCC_DXT1:
-						format = TextureFormat.BC1;
-						break;
-					case FOURCC_DXT3:
-						format = TextureFormat.BC2;
-						break;
-					case FOURCC_DXT5:
-						format = TextureFormat.BC3;
-						break;
-					case FOURCC_DX10:
-						// If the fourCC is DX10, there is an extra header with additional format information.
-						uint dxgiFormat = reader.ReadUInt32();
-
-						// These values are taken from the DXGI_FORMAT enum.
-						switch (dxgiFormat)
-						{
-							case 2:
-								format = TextureFormat.R32G32B32A32_SFLOAT;
-								break;
-
-							case 10:
-								format = TextureFormat.R16G16B16A16_SFLOAT;
-								break;
-
-							case 71:
-								format = TextureFormat.BC1;
-								break;
-
-							case 74:
-								format = TextureFormat.BC2;
-								break;
-
-							case 77:
-								format = TextureFormat.BC3;
-								break;
-
-							case 98:
-								format = TextureFormat.BC7;
-								break;
-
-							default:
-								throw new NotSupportedException(
-									"Unsupported DDS texture format"
-								);
-						}
-
-						uint resourceDimension = reader.ReadUInt32();
-
-						// These values are taken from the D3D10_RESOURCE_DIMENSION enum.
-						switch (resourceDimension)
-						{
-							case 0: // Unknown
-							case 1: // Buffer
-								throw new NotSupportedException(
-									"Unsupported DDS texture format"
-								);
-							default:
-								break;
-						}
-
-						/*
-						 * This flag seemingly only indicates if the texture is a cube map.
-						 * This is already determined above. Cool!
-						 */
-						uint miscFlag = reader.ReadUInt32();
-
-						/*
-						 * Indicates the number of elements in the texture array.
-						 * We don't support texture arrays so just throw if it's greater than 1.
-						 */
-						uint arraySize = reader.ReadUInt32();
-
-						if (arraySize > 1)
-						{
-							throw new NotSupportedException(
-								"Unsupported DDS texture format"
-							);
-						}
-
-						reader.ReadUInt32(); // reserved
-
-						break;
-					default:
-						throw new NotSupportedException(
-							"Unsupported DDS texture format"
-						);
-				}
-			}
-			else if ((formatFlags & DDPF_RGB) == DDPF_RGB)
-			{
-				if (	formatRGBBitCount != 32 ||
-					formatRBitMask != 0x00FF0000 ||
-					formatGBitMask != 0x0000FF00 ||
-					formatBBitMask != 0x000000FF ||
-					formatABitMask != 0xFF000000	)
-				{
-					throw new NotSupportedException(
-						"Unsupported DDS texture format"
-					);
-				}
-
-				format = TextureFormat.B8G8R8A8;
-			}
-			else
-			{
-				throw new NotSupportedException(
-					"Unsupported DDS texture format"
-				);
-			}
-		}
-
-		public static int CalculateDDSLevelSize(
-			int width,
-			int height,
-			TextureFormat format
-		) {
-			if (format == TextureFormat.R8G8B8A8)
-			{
-				return (((width * 32) + 7) / 8) * height;
-			}
-			else if (format == TextureFormat.R16G16B16A16_SFLOAT)
-			{
-				return (((width * 64) + 7) / 8) * height;
-			}
-			else if (format == TextureFormat.R32G32B32A32_SFLOAT)
-			{
-				return (((width * 128) + 7) / 8) * height;
-			}
-			else
-			{
-				int blockSize = 16;
-				if (format == TextureFormat.BC1)
-				{
-					blockSize = 8;
-				}
-				width = System.Math.Max(width, 1);
-				height = System.Math.Max(height, 1);
-				return (
-					((width + 3) / 4) *
-					((height + 3) / 4) *
-					blockSize
-				);
-			}
-		}
-	}
-}

src/Graphics/RefreshEnums.cs

@@ -0,0 +1,307 @@
+using System;
+
+namespace MoonWorks
+{
+	/// <summary>
+	/// Presentation mode for a window.
+	/// </summary>
+	public enum PresentMode
+	{
+		/// <summary>
+		/// Does not wait for v-blank to update the window. Can cause visible tearing.
+		/// </summary>
+		Immediate,
+		/// <summary>
+		/// Waits for v-blank and uses a queue to hold present requests.
+		/// Allows for low latency while preventing tearing.
+		/// May not be supported on non-Vulkan non-Linux systems or older hardware.
+		/// </summary>
+		Mailbox,
+		/// <summary>
+		/// Waits for v-blank and adds present requests to a queue.
+		/// Will probably cause latency.
+		/// Required to be supported by all compliant hardware.
+		/// </summary>
+		FIFO,
+		/// <summary>
+		/// Usually waits for v-blank, but if v-blank has passed since last update will update immediately.
+		/// May cause visible tearing.
+		/// </summary>
+		FIFORelaxed
+	}
+}
+
+/* Recreate all the enums in here so we don't need to explicitly
+ * reference the RefreshCS namespace when using MoonWorks.Graphics
+ */
+namespace MoonWorks.Graphics
+{
+	public enum PrimitiveType
+	{
+		PointList,
+		LineList,
+		LineStrip,
+		TriangleList,
+		TriangleStrip
+	}
+
+	/// <summary>
+	/// Describes the operation that a render pass will use when loading a render target.
+	/// </summary>
+	public enum LoadOp
+	{
+		Load,
+		Clear,
+		DontCare
+	}
+
+	/// <summary>
+	/// Describes the operation that a render pass will use when storing a render target.
+	/// </summary>
+	public enum StoreOp
+	{
+		Store,
+		DontCare
+	}
+
+	[Flags]
+	public enum ClearOptionsFlags : uint
+	{
+		Color = 1,
+		Depth = 2,
+		Stencil = 4,
+		DepthStencil = Depth | Stencil,
+		All = Color | Depth | Stencil
+	}
+
+	public enum IndexElementSize
+	{
+		Sixteen,
+		ThirtyTwo
+	}
+
+	public enum TextureFormat
+	{
+		R8G8B8A8,
+		B8G8R8A8,
+		R5G6B5,
+		A1R5G5B5,
+		B4G4R4A4,
+		A2R10G10B10,
+		R16G16,
+		R16G16B16A16,
+		R8,
+		BC1,
+		BC2,
+		BC3,
+		BC7,
+		R8G8_SNORM,
+		R8G8B8A8_SNORM,
+		R16_SFLOAT,
+		R16G16_SFLOAT,
+		R16G16B16A16_SFLOAT,
+		R32_SFLOAT,
+		R32G32_SFLOAT,
+		R32G32B32A32_SFLOAT,
+
+		R8_UINT,
+		R8G8_UINT,
+		R8G8B8A8_UINT,
+		R16_UINT,
+		R16G16_UINT,
+		R16G16B16A16_UINT,
+		D16,
+		D32,
+		D16S8,
+		D32S8
+	}
+
+	[Flags]
+	public enum TextureUsageFlags : uint
+	{
+		Sampler = 1,
+		ColorTarget = 2,
+		DepthStencilTarget = 4,
+		Compute = 8
+	}
+
+	public enum SampleCount
+	{
+		One,
+		Two,
+		Four,
+		Eight
+	}
+
+	public enum CubeMapFace : uint
+	{
+		PositiveX,
+		NegativeX,
+		PositiveY,
+		NegativeY,
+		PositiveZ,
+		NegativeZ
+	}
+
+	[Flags]
+	public enum BufferUsageFlags : uint
+	{
+		Vertex = 1,
+		Index = 2,
+		Compute = 4,
+		Indirect = 8
+	}
+
+	public enum VertexElementFormat
+	{
+		UInt,
+		Float,
+		Vector2,
+		Vector3,
+		Vector4,
+		Color,
+		Byte4,
+		Short2,
+		Short4,
+		NormalizedShort2,
+		NormalizedShort4,
+		HalfVector2,
+		HalfVector4
+	}
+
+	public enum VertexInputRate
+	{
+		Vertex,
+		Instance
+	}
+
+	public enum FillMode
+	{
+		Fill,
+		Line
+	}
+
+	public enum CullMode
+	{
+		None,
+		Front,
+		Back
+	}
+
+	public enum FrontFace
+	{
+		CounterClockwise,
+		Clockwise
+	}
+
+	public enum CompareOp
+	{
+		Never,
+		Less,
+		Equal,
+		LessOrEqual,
+		Greater,
+		NotEqual,
+		GreaterOrEqual,
+		Always
+	}
+
+	public enum StencilOp
+	{
+		Keep,
+		Zero,
+		Replace,
+		IncrementAndClamp,
+		DecrementAndClamp,
+		Invert,
+		IncrementAndWrap,
+		DecrementAndWrap
+	}
+
+	public enum BlendOp
+	{
+		Add,
+		Subtract,
+		ReverseSubtract,
+		Min,
+		Max
+	}
+
+	public enum BlendFactor
+	{
+		Zero,
+		One,
+		SourceColor,
+		OneMinusSourceColor,
+		DestinationColor,
+		OneMinusDestinationColor,
+		SourceAlpha,
+		OneMinusSourceAlpha,
+		DestinationAlpha,
+		OneMinusDestinationAlpha,
+		ConstantColor,
+		OneMinusConstantColor,
+		SourceAlphaSaturate
+	}
+
+	[Flags]
+	public enum ColorComponentFlags : uint
+	{
+		R = 1,
+		G = 2,
+		B = 4,
+		A = 8,
+
+		RG = R | G,
+		RB = R | B,
+		RA = R | A,
+		GB = G | B,
+		GA = G | A,
+		BA = B | A,
+
+		RGB = R | G | B,
+		RGA = R | G | A,
+		GBA = G | B | A,
+
+		RGBA = R | G | B | A,
+		None = 0
+	}
+
+	public enum Filter
+	{
+		Nearest,
+		Linear
+	}
+
+	public enum SamplerMipmapMode
+	{
+		Nearest,
+		Linear
+	}
+
+	public enum SamplerAddressMode
+	{
+		Repeat,
+		MirroredRepeat,
+		ClampToEdge,
+		ClampToBorder
+	}
+
+	public enum BorderColor
+	{
+		FloatTransparentBlack,
+		IntTransparentBlack,
+		FloatOpaqueBlack,
+		IntOpaqueBlack,
+		FloatOpaqueWhite,
+		IntOpaqueWhite
+	}
+
+	public enum Backend
+	{
+		DontCare,
+		Vulkan,
+		PS5,
+		Invalid
+	}
+}

src/Graphics/RefreshResource.cs

@@ -1,16 +1,17 @@
 using System;
+using System.Runtime.InteropServices;
 using System.Threading;
 
 namespace MoonWorks.Graphics;
 
-public abstract class SDL_GpuResource : GraphicsResource
+public abstract class RefreshResource : GraphicsResource
 {
 	public IntPtr Handle { get => handle; internal set => handle = value; }
 	private IntPtr handle;
 
-	protected abstract Action<IntPtr, IntPtr> ReleaseFunction { get; }
+	protected abstract Action<IntPtr, IntPtr> QueueDestroyFunction { get; }
 
-	protected SDL_GpuResource(GraphicsDevice device) : base(device)
+	protected RefreshResource(GraphicsDevice device) : base(device)
 	{
 	}
 
@@ -18,11 +19,11 @@ public abstract class SDL_GpuResource : GraphicsResource
 	{
 		if (!IsDisposed)
 		{
-			// Atomically call release function in case this is called from the finalizer thread
+			// Atomically call destroy function in case this is called from the finalizer thread
 			var toDispose = Interlocked.Exchange(ref handle, IntPtr.Zero);
 			if (toDispose != IntPtr.Zero)
 			{
-				ReleaseFunction(Device.Handle, toDispose);
+				QueueDestroyFunction(Device.Handle, toDispose);
 			}
 		}
 		base.Dispose(disposing);

src/Graphics/RefreshStructs.cs

@@ -0,0 +1,357 @@
+using RefreshCS;
+using System.Runtime.InteropServices;
+
+/* Recreate some structs in here so we don't need to explicitly
+ * reference the RefreshCS namespace when using MoonWorks.Graphics
+ */
+namespace MoonWorks.Graphics
+{
+	[StructLayout(LayoutKind.Sequential)]
+	public struct DepthStencilValue
+	{
+		public float Depth;
+		public uint Stencil;
+
+		public DepthStencilValue(float depth, uint stencil)
+		{
+			Depth = depth;
+			Stencil = stencil;
+		}
+
+		// FIXME: can we do an unsafe cast somehow?
+		public Refresh.DepthStencilValue ToRefresh()
+		{
+			return new Refresh.DepthStencilValue
+			{
+				depth = Depth,
+				stencil = Stencil
+			};
+		}
+	}
+
+	[StructLayout(LayoutKind.Sequential)]
+	public struct Rect
+	{
+		public int X;
+		public int Y;
+		public int W;
+		public int H;
+
+		public Rect(int x, int y, int w, int h)
+		{
+			X = x;
+			Y = y;
+			W = w;
+			H = h;
+		}
+
+		public Rect(int w, int h)
+		{
+			X = 0;
+			Y = 0;
+			W = w;
+			H = h;
+		}
+
+		// FIXME: can we do an unsafe cast somehow?
+		public Refresh.Rect ToRefresh()
+		{
+			return new Refresh.Rect
+			{
+				x = X,
+				y = Y,
+				w = W,
+				h = H
+			};
+		}
+	}
+
+	[StructLayout(LayoutKind.Sequential)]
+	public struct Viewport
+	{
+		public float X;
+		public float Y;
+		public float W;
+		public float H;
+		public float MinDepth;
+		public float MaxDepth;
+
+		public Viewport(float w, float h)
+		{
+			X = 0;
+			Y = 0;
+			W = w;
+			H = h;
+			MinDepth = 0;
+			MaxDepth = 1;
+		}
+
+		public Viewport(float x, float y, float w, float h)
+		{
+			X = x;
+			Y = y;
+			W = w;
+			H = h;
+			MinDepth = 0;
+			MaxDepth = 1;
+		}
+
+		public Viewport(float x, float y, float w, float h, float minDepth, float maxDepth)
+		{
+			X = x;
+			Y = y;
+			W = w;
+			H = h;
+			MinDepth = minDepth;
+			MaxDepth = maxDepth;
+		}
+
+		public Refresh.Viewport ToRefresh()
+		{
+			return new Refresh.Viewport
+			{
+				x = X,
+				y = Y,
+				w = W,
+				h = H,
+				minDepth = MinDepth,
+				maxDepth = MaxDepth
+			};
+		}
+	}
+
+	[StructLayout(LayoutKind.Sequential)]
+	public struct VertexBinding
+	{
+		public uint Binding;
+		public uint Stride;
+		public VertexInputRate InputRate;
+
+		public static VertexBinding Create<T>(uint binding = 0, VertexInputRate inputRate = VertexInputRate.Vertex) where T : unmanaged
+		{
+			return new VertexBinding
+			{
+				Binding = binding,
+				InputRate = inputRate,
+				Stride = (uint) Marshal.SizeOf<T>()
+			};
+		}
+	}
+
+	[StructLayout(LayoutKind.Sequential)]
+	public struct VertexAttribute
+	{
+		public uint Location;
+		public uint Binding;
+		public VertexElementFormat Format;
+		public uint Offset;
+	}
+
+	[StructLayout(LayoutKind.Sequential)]
+	public struct StencilOpState
+	{
+		public StencilOp FailOp;
+		public StencilOp PassOp;
+		public StencilOp DepthFailOp;
+		public CompareOp CompareOp;
+		public uint CompareMask;
+		public uint WriteMask;
+		public uint Reference;
+
+		// FIXME: can we do an explicit cast here?
+		public Refresh.StencilOpState ToRefresh()
+		{
+			return new Refresh.StencilOpState
+			{
+				failOp = (Refresh.StencilOp) FailOp,
+				passOp = (Refresh.StencilOp) PassOp,
+				depthFailOp = (Refresh.StencilOp) DepthFailOp,
+				compareOp = (Refresh.CompareOp) CompareOp,
+				compareMask = CompareMask,
+				writeMask = WriteMask,
+				reference = Reference
+			};
+		}
+	}
+
+	[StructLayout(LayoutKind.Sequential)]
+	public struct ColorAttachmentInfo
+	{
+		public Texture Texture;
+		public uint Depth;
+		public uint Layer;
+		public uint Level;
+		public Color ClearColor;
+		public LoadOp LoadOp;
+		public StoreOp StoreOp;
+
+		public ColorAttachmentInfo(
+			Texture texture,
+			Color clearColor,
+			StoreOp storeOp = StoreOp.Store
+		) {
+			Texture = texture;
+			Depth = 0;
+			Layer = 0;
+			Level = 0;
+			ClearColor = clearColor;
+			LoadOp = LoadOp.Clear;
+			StoreOp = storeOp;
+		}
+
+		public ColorAttachmentInfo(
+			Texture texture,
+			LoadOp loadOp = LoadOp.DontCare,
+			StoreOp storeOp = StoreOp.Store
+		) {
+			Texture = texture;
+			Depth = 0;
+			Layer = 0;
+			Level = 0;
+			ClearColor = Color.White;
+			LoadOp = loadOp;
+			StoreOp = storeOp;
+		}
+
+		public Refresh.ColorAttachmentInfo ToRefresh()
+		{
+			return new Refresh.ColorAttachmentInfo
+			{
+				texture = Texture.Handle,
+				depth = Depth,
+				layer = Layer,
+				level = Level,
+				clearColor = new Refresh.Vec4
+				{
+					x = ClearColor.R / 255f,
+					y = ClearColor.G / 255f,
+					z = ClearColor.B / 255f,
+					w = ClearColor.A / 255f
+				},
+				loadOp = (Refresh.LoadOp) LoadOp,
+				storeOp = (Refresh.StoreOp) StoreOp
+			};
+		}
+	}
+
+	[StructLayout(LayoutKind.Sequential)]
+	public struct DepthStencilAttachmentInfo
+	{
+		public Texture Texture;
+		public uint Depth;
+		public uint Layer;
+		public uint Level;
+		public DepthStencilValue DepthStencilClearValue;
+		public LoadOp LoadOp;
+		public StoreOp StoreOp;
+		public LoadOp StencilLoadOp;
+		public StoreOp StencilStoreOp;
+
+		public DepthStencilAttachmentInfo(
+			Texture texture,
+			DepthStencilValue clearValue,
+			StoreOp depthStoreOp = StoreOp.Store,
+			StoreOp stencilStoreOp = StoreOp.Store
+		)
+		{
+			Texture = texture;
+			Depth = 0;
+			Layer = 0;
+			Level = 0;
+			DepthStencilClearValue = clearValue;
+			LoadOp = LoadOp.Clear;
+			StoreOp = depthStoreOp;
+			StencilLoadOp = LoadOp.Clear;
+			StencilStoreOp = stencilStoreOp;
+		}
+
+		public DepthStencilAttachmentInfo(
+			Texture texture,
+			LoadOp loadOp = LoadOp.DontCare,
+			StoreOp storeOp = StoreOp.Store,
+			LoadOp stencilLoadOp = LoadOp.DontCare,
+			StoreOp stencilStoreOp = StoreOp.Store
+		) {
+			Texture = texture;
+			Depth = 0;
+			Layer = 0;
+			Level = 0;
+			DepthStencilClearValue = new DepthStencilValue();
+			LoadOp = loadOp;
+			StoreOp = storeOp;
+			StencilLoadOp = stencilLoadOp;
+			StencilStoreOp = stencilStoreOp;
+		}
+
+		public DepthStencilAttachmentInfo(
+			Texture texture,
+			DepthStencilValue depthStencilValue,
+			LoadOp loadOp,
+			StoreOp storeOp,
+			LoadOp stencilLoadOp,
+			StoreOp stencilStoreOp
+		) {
+			Texture = texture;
+			Depth = 0;
+			Layer = 0;
+			Level = 0;
+			DepthStencilClearValue = depthStencilValue;
+			LoadOp = loadOp;
+			StoreOp = storeOp;
+			StencilLoadOp = stencilLoadOp;
+			StencilStoreOp = stencilStoreOp;
+		}
+
+		public Refresh.DepthStencilAttachmentInfo ToRefresh()
+		{
+			return new Refresh.DepthStencilAttachmentInfo
+			{
+				texture = Texture.Handle,
+				depth = Depth,
+				layer = Layer,
+				level = Level,
+				depthStencilClearValue = DepthStencilClearValue.ToRefresh(),
+				loadOp = (Refresh.LoadOp) LoadOp,
+				storeOp = (Refresh.StoreOp) StoreOp,
+				stencilLoadOp = (Refresh.LoadOp) StencilLoadOp,
+				stencilStoreOp = (Refresh.StoreOp) StencilStoreOp
+			};
+		}
+	}
+
+	[StructLayout(LayoutKind.Sequential)]
+	public struct ColorAttachmentDescription
+	{
+		public TextureFormat Format;
+		public ColorAttachmentBlendState BlendState;
+
+		public ColorAttachmentDescription(
+			TextureFormat format,
+			ColorAttachmentBlendState blendState
+		) {
+			Format = format;
+			BlendState = blendState;
+		}
+	}
+
+	[StructLayout(LayoutKind.Sequential)]
+	public struct IndirectDrawCommand
+	{
+		public uint VertexCount;
+		public uint InstanceCount;
+		public uint FirstVertex;
+		public uint FirstInstance;
+
+		public IndirectDrawCommand(
+			uint vertexCount,
+			uint instanceCount,
+			uint firstVertex,
+			uint firstInstance
+		) {
+			VertexCount = vertexCount;
+			InstanceCount = instanceCount;
+			FirstVertex = firstVertex;
+			FirstInstance = firstInstance;
+		}
+	}
+}

src/Graphics/RenderPass.cs

@@ -1,559 +0,0 @@
-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; private set; }
-
-#if DEBUG
-	internal bool active;
-	internal uint colorAttachmentCount;
-	internal SampleCount colorAttachmentSampleCount;
-	internal TextureFormat colorFormatOne;
-	internal TextureFormat colorFormatTwo;
-	internal TextureFormat colorFormatThree;
-	internal TextureFormat colorFormatFour;
-	internal bool hasDepthStencilAttachment;
-	internal SampleCount depthStencilAttachmentSampleCount;
-	internal TextureFormat depthStencilFormat;
-
-	GraphicsPipeline currentGraphicsPipeline;
-#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.ToSDL()
-		);
-	}
-
-	/// <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.ToSDL()
-		);
-	}
-
-	/// <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 BindVertexBuffer(
-		in BufferBinding bufferBinding,
-		uint firstBinding = 0
-	) {
-#if DEBUG
-		AssertGraphicsPipelineBound();
-#endif
-
-		var sdlBufferBinding = bufferBinding.ToSDL();
-
-		SDL_Gpu.SDL_GpuBindVertexBuffers(
-			Handle,
-			firstBinding,
-			&sdlBufferBinding,
-			1
-		);
-	}
-
-	/// <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.ToSDL(),
-			(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 sdlTextureSamplerBinding = textureSamplerBinding.ToSDL();
-
-		SDL_Gpu.SDL_GpuBindVertexSamplers(
-			Handle,
-			slot,
-			&sdlTextureSamplerBinding,
-			1
-		);
-	}
-
-	public unsafe void BindVertexStorageTexture(
-		in TextureSlice textureSlice,
-		uint slot = 0
-	) {
-#if DEBUG
-		AssertGraphicsPipelineBound();
-		AssertTextureNonNull(textureSlice.Texture);
-		AssertTextureHasGraphicsStorageFlag(textureSlice.Texture);
-#endif
-
-		var sdlTextureSlice = textureSlice.ToSDL();
-
-		SDL_Gpu.SDL_GpuBindVertexStorageTextures(
-			Handle,
-			slot,
-			&sdlTextureSlice,
-			1
-		);
-	}
-
-	public unsafe void BindVertexStorageBuffer(
-		GpuBuffer buffer,
-		uint slot = 0
-	) {
-#if DEBUG
-		AssertGraphicsPipelineBound();
-		AssertBufferNonNull(buffer);
-		AssertBufferHasGraphicsStorageFlag(buffer);
-#endif
-
-		var bufferHandle = buffer.Handle;
-
-		SDL_Gpu.SDL_GpuBindVertexStorageBuffers(
-			Handle,
-			slot,
-			&bufferHandle,
-			1
-		);
-	}
-
-	public unsafe void BindFragmentSamplers(
-		in TextureSamplerBinding textureSamplerBinding,
-		uint slot = 0
-	) {
-#if DEBUG
-		AssertGraphicsPipelineBound();
-		AssertTextureSamplerBindingNonNull(textureSamplerBinding);
-		AssertTextureHasSamplerFlag(textureSamplerBinding.Texture);
-#endif
-
-		var sdlTextureSamplerBinding = textureSamplerBinding.ToSDL();
-
-		SDL_Gpu.SDL_GpuBindFragmentSamplers(
-			Handle,
-			slot,
-			&sdlTextureSamplerBinding,
-			1
-		);
-	}
-
-	public unsafe void BindFragmentStorageTexture(
-		in TextureSlice textureSlice,
-		uint slot = 0
-	) {
-#if DEBUG
-		AssertGraphicsPipelineBound();
-		AssertTextureNonNull(textureSlice.Texture);
-		AssertTextureHasGraphicsStorageFlag(textureSlice.Texture);
-#endif
-
-		var sdlTextureSlice = textureSlice.ToSDL();
-
-		SDL_Gpu.SDL_GpuBindFragmentStorageTextures(
-			Handle,
-			slot,
-			&sdlTextureSlice,
-			1
-		);
-	}
-
-	public unsafe void BindFragmentStorageBuffer(
-		GpuBuffer buffer,
-		uint slot = 0
-	) {
-#if DEBUG
-		AssertGraphicsPipelineBound();
-		AssertBufferNonNull(buffer);
-		AssertBufferHasGraphicsStorageFlag(buffer);
-#endif
-
-		var bufferHandle = buffer.Handle;
-
-		SDL_Gpu.SDL_GpuBindFragmentStorageBuffers(
-			Handle,
-			slot,
-			&bufferHandle,
-			1
-		);
-	}
-
-	public unsafe void PushVertexUniformData(
-		void* uniformsPtr,
-		uint size,
-		uint slot = 0
-	) {
-#if DEBUG
-		AssertGraphicsPipelineBound();
-
-		if (slot >= currentGraphicsPipeline.VertexShaderResourceInfo.UniformBufferCount)
-		{
-			throw new System.ArgumentException($"Slot {slot} given, but {currentGraphicsPipeline.VertexShaderResourceInfo.UniformBufferCount} uniform buffers are used on the shader!");
-		}
-#endif
-
-		SDL_Gpu.SDL_GpuPushVertexUniformData(
-			Handle,
-			slot,
-			(nint) uniformsPtr,
-			size
-		);
-	}
-
-	public unsafe void PushVertexUniformData<T>(
-		in T uniforms,
-		uint slot = 0
-	) where T : unmanaged
-	{
-		fixed (T* uniformsPtr = &uniforms)
-		{
-			PushVertexUniformData(uniformsPtr, (uint) Marshal.SizeOf<T>(), slot);
-		}
-	}
-
-	public unsafe void PushFragmentUniformData(
-		void* uniformsPtr,
-		uint size,
-		uint slot = 0
-	) {
-#if DEBUG
-		AssertGraphicsPipelineBound();
-
-		if (slot >= currentGraphicsPipeline.FragmentShaderResourceInfo.UniformBufferCount)
-		{
-			throw new System.ArgumentException($"Slot {slot} given, but {currentGraphicsPipeline.FragmentShaderResourceInfo.UniformBufferCount} uniform buffers are used on the shader!");
-		}
-#endif
-
-		SDL_Gpu.SDL_GpuPushFragmentUniformData(
-			Handle,
-			slot,
-			(nint) uniformsPtr,
-			size
-		);
-	}
-
-	public unsafe void PushFragmentUniformData<T>(
-		in T uniforms,
-		uint slot = 0
-	) where T : unmanaged
-	{
-		fixed (T* uniformsPtr = &uniforms)
-		{
-			PushFragmentUniformData(uniformsPtr, (uint) Marshal.SizeOf<T>(), slot);
-		}
-	}
-
-	/// <summary>
-	/// Draws using a vertex buffer and an index buffer, and an optional instance count.
-	/// </summary>
-	/// <param name="baseVertex">The starting index offset for the vertex buffer.</param>
-	/// <param name="startIndex">The starting index offset for the index buffer.</param>
-	/// <param name="primitiveCount">The number of primitives to draw.</param>
-	/// <param name="instanceCount">The number of instances to draw.</param>
-	public void DrawIndexedPrimitives(
-		uint baseVertex,
-		uint startIndex,
-		uint primitiveCount,
-		uint instanceCount = 1
-	) {
-#if DEBUG
-		AssertGraphicsPipelineBound();
-#endif
-
-		SDL_Gpu.SDL_GpuDrawIndexedPrimitives(
-			Handle,
-			baseVertex,
-			startIndex,
-			primitiveCount,
-			instanceCount
-		);
-	}
-
-	/// <summary>
-	/// Draws using a vertex buffer and an index buffer.
-	/// </summary>
-	/// <param name="baseVertex">The starting index offset for the vertex buffer.</param>
-	/// <param name="startIndex">The starting index offset for the index buffer.</param>
-	/// <param name="primitiveCount">The number of primitives to draw.</param>
-	public void DrawPrimitives(
-		uint vertexStart,
-		uint primitiveCount
-	)
-	{
-#if DEBUG
-		AssertGraphicsPipelineBound();
-#endif
-
-		SDL_Gpu.SDL_GpuDrawPrimitives(
-			Handle,
-			vertexStart,
-			primitiveCount
-		);
-	}
-
-	/// <summary>
-	/// Similar to DrawPrimitives, but parameters are set from a buffer.
-	/// The buffer must have the Indirect usage flag set.
-	/// </summary>
-	/// <param name="buffer">The draw parameters buffer.</param>
-	/// <param name="offsetInBytes">The offset to start reading from the draw parameters buffer.</param>
-	/// <param name="drawCount">The number of draw parameter sets that should be read from the buffer.</param>
-	/// <param name="stride">The byte stride between sets of draw parameters.</param>
-	public void DrawPrimitivesIndirect(
-		GpuBuffer buffer,
-		uint offsetInBytes,
-		uint drawCount,
-		uint stride
-	) {
-#if DEBUG
-		AssertGraphicsPipelineBound();
-#endif
-
-		SDL_Gpu.SDL_GpuDrawPrimitivesIndirect(
-			Handle,
-			buffer.Handle,
-			offsetInBytes,
-			drawCount,
-			stride
-		);
-	}
-
-	/// <summary>
-	/// Similar to DrawIndexedPrimitives, but parameters are set from a buffer.
-	/// The buffer must have the Indirect usage flag set.
-	/// </summary>
-	/// <param name="buffer">The draw parameters buffer.</param>
-	/// <param name="offsetInBytes">The offset to start reading from the draw parameters buffer.</param>
-	/// <param name="drawCount">The number of draw parameter sets that should be read from the buffer.</param>
-	/// <param name="stride">The byte stride between sets of draw parameters.</param>
-	public void DrawIndexedPrimitivesIndirect(
-		GpuBuffer buffer,
-		uint offsetInBytes,
-		uint drawCount,
-		uint stride
-	) {
-#if DEBUG
-		AssertGraphicsPipelineBound();
-#endif
-
-		SDL_Gpu.SDL_GpuDrawIndexedPrimitivesIndirect(
-			Handle,
-			buffer.Handle,
-			offsetInBytes,
-			drawCount,
-			stride
-		);
-	}
-
-#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!");
-		}
-	}
-
-	private void AssertBufferNonNull(GpuBuffer buffer)
-	{
-		if (buffer == null || buffer.Handle == IntPtr.Zero)
-		{
-			throw new System.NullReferenceException("Buffer must not be null!");
-		}
-	}
-
-	private void AssertBufferHasGraphicsStorageFlag(GpuBuffer buffer)
-	{
-		if ((buffer.UsageFlags & BufferUsageFlags.GraphicsStorage) == 0)
-		{
-			throw new System.ArgumentException("The bound Buffer's UsageFlags must include BufferUsageFlag.GraphicsStorage!");
-		}
-	}
-#endif
-}

src/Graphics/RenderPassPool.cs

@@ -1,25 +0,0 @@
-using System.Collections.Concurrent;
-
-namespace MoonWorks.Graphics;
-
-internal class RenderPassPool
-{
-	private ConcurrentQueue<RenderPass> RenderPasses = new ConcurrentQueue<RenderPass>();
-
-	public RenderPass Obtain()
-	{
-		if (RenderPasses.TryDequeue(out var renderPass))
-		{
-			return renderPass;
-		}
-		else
-		{
-			return new RenderPass();
-		}
-	}
-
-	public void Return(RenderPass renderPass)
-	{
-		RenderPasses.Enqueue(renderPass);
-	}
-}

src/Graphics/ResourceUploader.cs

@@ -1,381 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Runtime.InteropServices;
-
-namespace MoonWorks.Graphics
-{
-	/// <summary>
-	/// A convenience structure for creating resources and uploading their data.
-	///
-	/// Note that Upload or UploadAndWait must be called after the Create methods for the data to actually be uploaded.
-	///
-	/// Note that this structure does not magically keep memory usage down -
-	/// you may want to stagger uploads over multiple submissions to minimize memory usage.
-	/// </summary>
-	public unsafe class ResourceUploader : GraphicsResource
-	{
-		TransferBuffer BufferTransferBuffer;
-		TransferBuffer TextureTransferBuffer;
-
-		byte* bufferData;
-		uint bufferDataOffset = 0;
-		uint bufferDataSize = 1024;
-
-		byte* textureData;
-		uint textureDataOffset = 0;
-		uint textureDataSize = 1024;
-
-		List<(GpuBuffer, BufferCopy, bool)> BufferUploads = new List<(GpuBuffer, BufferCopy, bool)>();
-		List<(TextureRegion, uint, bool)> TextureUploads = new List<(TextureRegion, uint, bool)>();
-
-		public ResourceUploader(GraphicsDevice device) : base(device)
-		{
-			bufferData = (byte*) NativeMemory.Alloc(bufferDataSize);
-			textureData = (byte*) NativeMemory.Alloc(textureDataSize);
-		}
-
-		// Buffers
-
-		/// <summary>
-		/// Creates a GpuBuffer with data to be uploaded.
-		/// </summary>
-		public GpuBuffer CreateBuffer<T>(Span<T> data, BufferUsageFlags usageFlags) where T : unmanaged
-		{
-			var lengthInBytes = (uint) (Marshal.SizeOf<T>() * data.Length);
-			var gpuBuffer = new GpuBuffer(Device, usageFlags, lengthInBytes);
-
-			SetBufferData(gpuBuffer, 0, data, false);
-
-			return gpuBuffer;
-		}
-
-		/// <summary>
-		/// Prepares upload of data into a GpuBuffer.
-		/// </summary>
-		public void SetBufferData<T>(GpuBuffer buffer, uint bufferOffsetInElements, Span<T> data, bool cycle) where T : unmanaged
-		{
-			uint elementSize = (uint) Marshal.SizeOf<T>();
-			uint offsetInBytes = elementSize * bufferOffsetInElements;
-			uint lengthInBytes = (uint) (elementSize * data.Length);
-
-			uint resourceOffset;
-			fixed (void* spanPtr = data)
-			{
-				resourceOffset = CopyBufferData(spanPtr, lengthInBytes);
-			}
-
-			var bufferCopyParams = new BufferCopy(resourceOffset, offsetInBytes, lengthInBytes);
-			BufferUploads.Add((buffer, bufferCopyParams, cycle));
-		}
-
-		// Textures
-
-		public Texture CreateTexture2D<T>(Span<T> pixelData, uint width, uint height) where T : unmanaged
-		{
-			var texture = Texture.CreateTexture2D(Device, width, height, TextureFormat.R8G8B8A8, TextureUsageFlags.Sampler);
-			SetTextureData(texture, pixelData, false);
-			return texture;
-		}
-
-		/// <summary>
-		/// Creates a 2D Texture from compressed image data to be uploaded.
-		/// </summary>
-		public Texture CreateTexture2DFromCompressed(Span<byte> compressedImageData)
-		{
-			ImageUtils.ImageInfoFromBytes(compressedImageData, out var width, out var height, out var _);
-			var texture = Texture.CreateTexture2D(Device, width, height, TextureFormat.R8G8B8A8, TextureUsageFlags.Sampler);
-			SetTextureDataFromCompressed(texture, compressedImageData);
-			return texture;
-		}
-
-		/// <summary>
-		/// Creates a 2D Texture from a compressed image stream to be uploaded.
-		/// </summary>
-		public Texture CreateTexture2DFromCompressed(Stream compressedImageStream)
-		{
-			var length = compressedImageStream.Length;
-			var buffer = NativeMemory.Alloc((nuint) length);
-			var span = new Span<byte>(buffer, (int) length);
-			compressedImageStream.ReadExactly(span);
-
-			var texture = CreateTexture2DFromCompressed(span);
-
-			NativeMemory.Free(buffer);
-
-			return texture;
-		}
-
-		/// <summary>
-		/// Creates a 2D Texture from a compressed image file to be uploaded.
-		/// </summary>
-		public Texture CreateTexture2DFromCompressed(string compressedImageFilePath)
-		{
-			var fileStream = new FileStream(compressedImageFilePath, FileMode.Open, FileAccess.Read);
-			return CreateTexture2DFromCompressed(fileStream);
-		}
-
-		/// <summary>
-		/// Creates a texture from a DDS stream.
-		/// </summary>
-		public Texture CreateTextureFromDDS(Stream stream)
-		{
-			using var reader = new BinaryReader(stream);
-			Texture texture;
-			int faces;
-			ImageUtils.ParseDDS(reader, out var format, out var width, out var height, out var levels, out var isCube);
-
-			if (isCube)
-			{
-				texture = Texture.CreateTextureCube(Device, (uint) width, format, TextureUsageFlags.Sampler, (uint) levels);
-				faces = 6;
-			}
-			else
-			{
-				texture = Texture.CreateTexture2D(Device, (uint) width, (uint) height, format, TextureUsageFlags.Sampler, (uint) levels);
-				faces = 1;
-			}
-
-			for (int face = 0; face < faces; face += 1)
-			{
-				for (int level = 0; level < levels; level += 1)
-				{
-					var levelWidth = width >> level;
-					var levelHeight = height >> level;
-
-					var levelSize = ImageUtils.CalculateDDSLevelSize(levelWidth, levelHeight, format);
-					var byteBuffer = NativeMemory.Alloc((nuint) levelSize);
-					var byteSpan = new Span<byte>(byteBuffer, levelSize);
-					stream.ReadExactly(byteSpan);
-
-					var textureRegion = new TextureRegion
-					{
-						TextureSlice = new TextureSlice
-						{
-							Texture = texture,
-							Layer = (uint) face,
-							MipLevel = (uint) level
-						},
-						X = 0,
-						Y = 0,
-						Z = 0,
-						Width = (uint) levelWidth,
-						Height = (uint) levelHeight,
-						Depth = 1
-					};
-
-					SetTextureData(textureRegion, byteSpan, false);
-
-					NativeMemory.Free(byteBuffer);
-				}
-			}
-
-			return texture;
-		}
-
-		/// <summary>
-		/// Creates a texture from a DDS file.
-		/// </summary>
-		public Texture CreateTextureFromDDS(string path)
-		{
-			var stream = new FileStream(path, FileMode.Open, FileAccess.Read);
-			return CreateTextureFromDDS(stream);
-		}
-
-		public void SetTextureDataFromCompressed(TextureRegion textureRegion, Span<byte> compressedImageData)
-		{
-			var pixelData = ImageUtils.GetPixelDataFromBytes(compressedImageData, out var _, out var _, out var sizeInBytes);
-			var pixelSpan = new Span<byte>((void*) pixelData, (int) sizeInBytes);
-
-			SetTextureData(textureRegion, pixelSpan, false);
-
-			ImageUtils.FreePixelData(pixelData);
-		}
-
-		public void SetTextureDataFromCompressed(TextureRegion textureRegion, Stream compressedImageStream)
-		{
-			var length = compressedImageStream.Length;
-			var buffer = NativeMemory.Alloc((nuint) length);
-			var span = new Span<byte>(buffer, (int) length);
-			compressedImageStream.ReadExactly(span);
-			SetTextureDataFromCompressed(textureRegion, span);
-			NativeMemory.Free(buffer);
-		}
-
-		public void SetTextureDataFromCompressed(TextureRegion textureRegion, string compressedImageFilePath)
-		{
-			var fileStream = new FileStream(compressedImageFilePath, FileMode.Open, FileAccess.Read);
-			SetTextureDataFromCompressed(textureRegion, fileStream);
-		}
-
-		/// <summary>
-		/// Prepares upload of pixel data into a TextureSlice.
-		/// </summary>
-		public void SetTextureData<T>(TextureRegion textureRegion, Span<T> data, bool cycle) where T : unmanaged
-		{
-			var elementSize = Marshal.SizeOf<T>();
-			var dataLengthInBytes = (uint) (elementSize * data.Length);
-
-			uint resourceOffset;
-			fixed (T* dataPtr = data)
-			{
-				resourceOffset = CopyTextureData(dataPtr, dataLengthInBytes, Texture.BytesPerPixel(textureRegion.TextureSlice.Texture.Format));
-			}
-
-			TextureUploads.Add((textureRegion, resourceOffset, cycle));
-		}
-
-		// Upload
-
-		/// <summary>
-		/// Uploads all the data corresponding to the created resources.
-		/// </summary>
-		public void Upload()
-		{
-			CopyToTransferBuffer();
-
-			var commandBuffer = Device.AcquireCommandBuffer();
-			RecordUploadCommands(commandBuffer);
-			Device.Submit(commandBuffer);
-		}
-
-		/// <summary>
-		/// Uploads and then blocks until the upload is finished.
-		/// This is useful for keeping memory usage down during threaded upload.
-		/// </summary>
-		public void UploadAndWait()
-		{
-			CopyToTransferBuffer();
-
-			var commandBuffer = Device.AcquireCommandBuffer();
-			RecordUploadCommands(commandBuffer);
-			var fence = Device.SubmitAndAcquireFence(commandBuffer);
-			Device.WaitForFences(fence);
-			Device.ReleaseFence(fence);
-		}
-
-		// Helper methods
-
-		private void CopyToTransferBuffer()
-		{
-			if (BufferUploads.Count > 0)
-			{
-				if (BufferTransferBuffer == null || BufferTransferBuffer.Size < bufferDataSize)
-				{
-					BufferTransferBuffer?.Dispose();
-					BufferTransferBuffer = new TransferBuffer(Device, TransferUsage.Buffer, TransferBufferMapFlags.Write, bufferDataSize);
-				}
-
-				var dataSpan = new Span<byte>(bufferData, (int) bufferDataSize);
-				BufferTransferBuffer.SetData(dataSpan, true);
-			}
-
-
-			if (TextureUploads.Count > 0)
-			{
-				if (TextureTransferBuffer == null || TextureTransferBuffer.Size < textureDataSize)
-				{
-					TextureTransferBuffer?.Dispose();
-					TextureTransferBuffer = new TransferBuffer(Device, TransferUsage.Texture, TransferBufferMapFlags.Write, textureDataSize);
-				}
-
-				var dataSpan = new Span<byte>(textureData, (int) textureDataSize);
-				TextureTransferBuffer.SetData(dataSpan, true);
-			}
-		}
-
-		private void RecordUploadCommands(CommandBuffer commandBuffer)
-		{
-			var copyPass = commandBuffer.BeginCopyPass();
-
-			foreach (var (gpuBuffer, bufferCopyParams, option) in BufferUploads)
-			{
-				copyPass.UploadToBuffer(
-					BufferTransferBuffer,
-					gpuBuffer,
-					bufferCopyParams,
-					option
-				);
-			}
-
-			foreach (var (textureRegion, offset, option) in TextureUploads)
-			{
-				copyPass.UploadToTexture(
-					TextureTransferBuffer,
-					textureRegion,
-					new BufferImageCopy(
-						offset,
-						0,
-						0
-					),
-					option
-				);
-			}
-
-			commandBuffer.EndCopyPass(copyPass);
-
-			BufferUploads.Clear();
-			TextureUploads.Clear();
-			bufferDataOffset = 0;
-		}
-
-		private uint CopyBufferData(void* ptr, uint lengthInBytes)
-		{
-			if (bufferDataOffset + lengthInBytes >= bufferDataSize)
-			{
-				bufferDataSize = bufferDataOffset + lengthInBytes;
-				bufferData = (byte*) NativeMemory.Realloc(bufferData, bufferDataSize);
-			}
-
-			var resourceOffset = bufferDataOffset;
-
-			NativeMemory.Copy(ptr, bufferData + bufferDataOffset, lengthInBytes);
-			bufferDataOffset += lengthInBytes;
-
-			return resourceOffset;
-		}
-
-		private uint CopyTextureData(void* ptr, uint lengthInBytes, uint alignment)
-		{
-			textureDataOffset = RoundToAlignment(textureDataOffset, alignment);
-
-			if (textureDataOffset + lengthInBytes >= textureDataSize)
-			{
-				textureDataSize = textureDataOffset + lengthInBytes;
-				textureData = (byte*) NativeMemory.Realloc(textureData, textureDataSize);
-			}
-
-			var resourceOffset = textureDataOffset;
-
-			NativeMemory.Copy(ptr, textureData + textureDataOffset, lengthInBytes);
-			textureDataOffset += lengthInBytes;
-
-			return resourceOffset;
-		}
-
-		private uint RoundToAlignment(uint value, uint alignment)
-		{
-			return alignment * ((value + alignment - 1) / alignment);
-		}
-
-		// Dispose
-
-		/// <summary>
-		/// It is valid to immediately call Dispose after calling Upload.
-		/// </summary>
-		protected override void Dispose(bool disposing)
-		{
-			if (!IsDisposed)
-			{
-				if (disposing)
-				{
-					BufferTransferBuffer?.Dispose();
-					TextureTransferBuffer?.Dispose();
-				}
-
-				NativeMemory.Free(bufferData);
-			}
-			base.Dispose(disposing);
-		}
-	}
-}

src/Graphics/Resources/Buffer.cs

@@ -0,0 +1,141 @@
+using System;
+using System.Runtime.InteropServices;
+using RefreshCS;
+
+namespace MoonWorks.Graphics
+{
+	/// <summary>
+	/// Buffers are generic data containers that can be used by the GPU.
+	/// </summary>
+	public class Buffer : RefreshResource
+	{
+		protected override Action<IntPtr, IntPtr> QueueDestroyFunction => Refresh.Refresh_QueueDestroyBuffer;
+
+		/// <summary>
+		/// Size in bytes.
+		/// </summary>
+		public uint Size { get; }
+
+		/// <summary>
+		/// Creates a buffer of appropriate size given a type and element count.
+		/// </summary>
+		/// <typeparam name="T">The type that the buffer will contain.</typeparam>
+		/// <param name="device">The GraphicsDevice.</param>
+		/// <param name="usageFlags">Specifies how the buffer will be used.</param>
+		/// <param name="elementCount">How many elements of type T the buffer will contain.</param>
+		/// <returns></returns>
+		public unsafe static Buffer Create<T>(
+			GraphicsDevice device,
+			BufferUsageFlags usageFlags,
+			uint elementCount
+		) where T : unmanaged
+		{
+			return new Buffer(
+				device,
+				usageFlags,
+				(uint) Marshal.SizeOf<T>() * elementCount
+			);
+		}
+
+		/// <summary>
+		/// Creates a buffer.
+		/// </summary>
+		/// <param name="device">An initialized GraphicsDevice.</param>
+		/// <param name="usageFlags">Specifies how the buffer will be used.</param>
+		/// <param name="sizeInBytes">The length of the array. Cannot be resized.</param>
+		public Buffer(
+			GraphicsDevice device,
+			BufferUsageFlags usageFlags,
+			uint sizeInBytes
+		) : base(device)
+		{
+			Handle = Refresh.Refresh_CreateBuffer(
+				device.Handle,
+				(Refresh.BufferUsageFlags) usageFlags,
+				sizeInBytes
+			);
+			Size = sizeInBytes;
+		}
+
+		/// <summary>
+		/// Reads data out of a buffer and into a span.
+		/// This operation is only guaranteed to read up-to-date data if GraphicsDevice.Wait or GraphicsDevice.WaitForFences is called first.
+		/// </summary>
+		/// <param name="data">The span that data will be copied to.</param>
+		/// <param name="dataLengthInBytes">The length of the data to read.</param>
+		public unsafe void GetData<T>(
+			Span<T> data,
+			uint dataLengthInBytes
+		) where T : unmanaged
+		{
+#if DEBUG
+			if (dataLengthInBytes > Size)
+			{
+				Logger.LogWarn("Requested too many bytes from buffer!");
+			}
+
+			if (dataLengthInBytes > data.Length * Marshal.SizeOf<T>())
+			{
+				Logger.LogWarn("Data length is larger than the provided Span!");
+			}
+#endif
+
+			fixed (T* ptr = data)
+			{
+				Refresh.Refresh_GetBufferData(
+					Device.Handle,
+					Handle,
+					(IntPtr) ptr,
+					dataLengthInBytes
+				);
+			}
+		}
+
+		/// <summary>
+		/// Reads data out of a buffer and into an array.
+		/// This operation is only guaranteed to read up-to-date data if GraphicsDevice.Wait or GraphicsDevice.WaitForFences is called first.
+		/// </summary>
+		/// <param name="data">The span that data will be copied to.</param>
+		/// <param name="dataLengthInBytes">The length of the data to read.</param>
+		public unsafe void GetData<T>(
+			T[] data,
+			uint dataLengthInBytes
+		) where T : unmanaged
+		{
+			GetData(new Span<T>(data), dataLengthInBytes);
+		}
+
+		/// <summary>
+		/// Reads data out of a buffer and into a span.
+		/// This operation is only guaranteed to read up-to-date data if GraphicsDevice.Wait or GraphicsDevice.WaitForFences is called first.
+		/// Fills the span with as much data from the buffer as it can.
+		/// </summary>
+		/// <param name="data">The span that data will be copied to.</param>
+		public unsafe void GetData<T>(
+			Span<T> data
+		) where T : unmanaged
+		{
+			var lengthInBytes = System.Math.Min(data.Length * Marshal.SizeOf<T>(), Size);
+			GetData(data, (uint) lengthInBytes);
+		}
+
+		/// <summary>
+		/// Reads data out of a buffer and into an array.
+		/// This operation is only guaranteed to read up-to-date data if GraphicsDevice.Wait or GraphicsDevice.WaitForFences is called first.
+		/// Fills the array with as much data from the buffer as it can.
+		/// </summary>
+		/// <param name="data">The span that data will be copied to.</param>
+		public unsafe void GetData<T>(
+			T[] data
+		) where T : unmanaged
+		{
+			var lengthInBytes = System.Math.Min(data.Length * Marshal.SizeOf<T>(), Size);
+			GetData(new Span<T>(data), (uint) lengthInBytes);
+		}
+
+		public static implicit operator BufferBinding(Buffer b)
+		{
+			return new BufferBinding(b, 0);
+		}
+	}
+}

src/Graphics/Resources/ComputePipeline.cs

@@ -1,4 +1,4 @@
-using SDL2_gpuCS;
+using RefreshCS;
 using System;
 
 namespace MoonWorks.Graphics
@@ -6,35 +6,36 @@ namespace MoonWorks.Graphics
 	/// <summary>
 	/// Compute pipelines perform arbitrary parallel processing on input data.
 	/// </summary>
-	public class ComputePipeline : SDL_GpuResource
+	public class ComputePipeline : RefreshResource
 	{
-		protected override Action<IntPtr, IntPtr> ReleaseFunction => SDL_Gpu.SDL_GpuReleaseComputePipeline;
+		protected override Action<IntPtr, IntPtr> QueueDestroyFunction => Refresh.Refresh_QueueDestroyComputePipeline;
 
-		public ComputePipelineResourceInfo ResourceInfo { get; }
+		public ComputeShaderInfo ComputeShaderInfo { get; }
 
 		public unsafe ComputePipeline(
 			GraphicsDevice device,
-			Shader computeShader,
+			ComputeShaderInfo computeShaderInfo
-			ComputePipelineResourceInfo resourceInfo
 		) : base(device)
 		{
-			var sdlComputePipelineCreateInfo = new SDL_Gpu.ComputePipelineCreateInfo
+			var refreshComputeShaderInfo = new Refresh.ComputeShaderInfo
 			{
-				ComputeShader = computeShader.Handle,
+				entryPointName = computeShaderInfo.EntryPointName,
-				PipelineResourceInfo = resourceInfo.ToSDL()
+				shaderModule = computeShaderInfo.ShaderModule.Handle,
+				uniformBufferSize = computeShaderInfo.UniformBufferSize,
+				bufferBindingCount = computeShaderInfo.BufferBindingCount,
+				imageBindingCount = computeShaderInfo.ImageBindingCount
 			};
 
-			Handle = SDL_Gpu.SDL_GpuCreateComputePipeline(
+			Handle = Refresh.Refresh_CreateComputePipeline(
 				device.Handle,
-				sdlComputePipelineCreateInfo
+				refreshComputeShaderInfo
 			);
-
 			if (Handle == IntPtr.Zero)
 			{
 				throw new Exception("Could not create compute pipeline!");
 			}
 
-			ResourceInfo = resourceInfo;
+			ComputeShaderInfo = computeShaderInfo;
 		}
 	}
 }

src/Graphics/Resources/Fence.cs

@@ -1,18 +1,18 @@
 using System;
-using SDL2_gpuCS;
+using RefreshCS;
 
-namespace MoonWorks.Graphics;
+namespace MoonWorks.Graphics
-
-/// <summary>
-/// Fences allow you to track the status of a submitted command buffer. <br/>
-/// You should only acquire a Fence if you will need to track the command buffer. <br/>
-/// You should make sure to call GraphicsDevice.ReleaseFence when done with a Fence to avoid memory growth. <br/>
-/// The Fence object itself is basically just a wrapper for the Refresh_Fence. <br/>
-/// The internal handle is replaced so that we can pool Fence objects to manage garbage.
-/// </summary>
-public class Fence : SDL_GpuResource
 {
-	protected override Action<nint, nint> ReleaseFunction => SDL_Gpu.SDL_GpuReleaseFence;
+	/// <summary>
+	/// Fences allow you to track the status of a submitted command buffer. <br/>
+	/// You should only acquire a Fence if you will need to track the command buffer. <br/>
+	/// You should make sure to call GraphicsDevice.ReleaseFence when done with a Fence to avoid memory growth. <br/>
+	/// The Fence object itself is basically just a wrapper for the Refresh_Fence. <br/>
+	/// The internal handle is replaced so that we can pool Fence objects to manage garbage.
+	/// </summary>
+	public class Fence : RefreshResource
+	{
+		protected override Action<nint, nint> QueueDestroyFunction => Refresh.Refresh_ReleaseFence;
 
 		internal Fence(GraphicsDevice device) : base(device)
 		{
@@ -22,4 +22,5 @@ public class Fence : SDL_GpuResource
 		{
 			Handle = handle;
 		}
+	}
 }

src/Graphics/Resources/GpuBuffer.cs

@@ -1,88 +0,0 @@
-using System;
-using System.Runtime.InteropServices;
-using SDL2_gpuCS;
-
-namespace MoonWorks.Graphics;
-
-/// <summary>
-/// GpuBuffers are generic data containers that can be used by the GPU.
-/// </summary>
-public class GpuBuffer : SDL_GpuResource
-{
-	protected override Action<IntPtr, IntPtr> ReleaseFunction => SDL_Gpu.SDL_GpuReleaseBuffer;
-
-	public BufferUsageFlags UsageFlags { get; }
-
-	/// <summary>
-	/// Size in bytes.
-	/// </summary>
-	public uint Size { get; }
-
-	private string name;
-	public string Name
-	{
-		get => name;
-
-		set
-		{
-			if (Device.DebugMode)
-			{
-				SDL_Gpu.SDL_GpuSetBufferName(
-					Device.Handle,
-					Handle,
-					value
-				);
-			}
-
-			name = value;
-		}
-	}
-
-	/// <summary>
-	/// Creates a buffer of appropriate size given a type and element count.
-	/// </summary>
-	/// <typeparam name="T">The type that the buffer will contain.</typeparam>
-	/// <param name="device">The GraphicsDevice.</param>
-	/// <param name="usageFlags">Specifies how the buffer will be used.</param>
-	/// <param name="elementCount">How many elements of type T the buffer will contain.</param>
-	/// <returns></returns>
-	public unsafe static GpuBuffer Create<T>(
-		GraphicsDevice device,
-		BufferUsageFlags usageFlags,
-		uint elementCount
-	) where T : unmanaged
-	{
-		return new GpuBuffer(
-			device,
-			usageFlags,
-			(uint) Marshal.SizeOf<T>() * elementCount
-		);
-	}
-
-	/// <summary>
-	/// Creates a buffer.
-	/// </summary>
-	/// <param name="device">An initialized GraphicsDevice.</param>
-	/// <param name="usageFlags">Specifies how the buffer will be used.</param>
-	/// <param name="sizeInBytes">The length of the array. Cannot be resized.</param>
-	public GpuBuffer(
-		GraphicsDevice device,
-		BufferUsageFlags usageFlags,
-		uint sizeInBytes
-	) : base(device)
-	{
-		Handle = SDL_Gpu.SDL_GpuCreateBuffer(
-			device.Handle,
-			(SDL_Gpu.BufferUsageFlags) usageFlags,
-			sizeInBytes
-		);
-		UsageFlags = usageFlags;
-		Size = sizeInBytes;
-		name = "";
-	}
-
-	public static implicit operator BufferBinding(GpuBuffer b)
-	{
-		return new BufferBinding(b, 0);
-	}
-}

src/Graphics/Resources/GraphicsPipeline.cs

@@ -1,6 +1,6 @@
 using System;
 using System.Runtime.InteropServices;
-using SDL2_gpuCS;
+using RefreshCS;
 
 namespace MoonWorks.Graphics
 {
@@ -8,12 +8,12 @@ namespace MoonWorks.Graphics
 	/// Graphics pipelines encapsulate all of the render state in a single object. <br/>
 	/// These pipelines are bound before draw calls are issued.
 	/// </summary>
-	public class GraphicsPipeline : SDL_GpuResource
+	public class GraphicsPipeline : RefreshResource
 	{
-		protected override Action<IntPtr, IntPtr> ReleaseFunction => SDL_Gpu.SDL_GpuReleaseGraphicsPipeline;
+		protected override Action<IntPtr, IntPtr> QueueDestroyFunction => Refresh.Refresh_QueueDestroyGraphicsPipeline;
 
-		public GraphicsPipelineResourceInfo VertexShaderResourceInfo { get; }
+		public GraphicsShaderInfo VertexShaderInfo { get; }
-		public GraphicsPipelineResourceInfo FragmentShaderResourceInfo { get; }
+		public GraphicsShaderInfo FragmentShaderInfo { get; }
 		public SampleCount SampleCount { get; }
 
 #if DEBUG
@@ -25,78 +25,100 @@ namespace MoonWorks.Graphics
 			in GraphicsPipelineCreateInfo graphicsPipelineCreateInfo
 		) : base(device)
 		{
-			SDL_Gpu.GraphicsPipelineCreateInfo sdlGraphicsPipelineCreateInfo;
+			DepthStencilState depthStencilState = graphicsPipelineCreateInfo.DepthStencilState;
+			GraphicsShaderInfo vertexShaderInfo = graphicsPipelineCreateInfo.VertexShaderInfo;
+			GraphicsShaderInfo fragmentShaderInfo = graphicsPipelineCreateInfo.FragmentShaderInfo;
+			MultisampleState multisampleState = graphicsPipelineCreateInfo.MultisampleState;
+			RasterizerState rasterizerState = graphicsPipelineCreateInfo.RasterizerState;
+			PrimitiveType primitiveType = graphicsPipelineCreateInfo.PrimitiveType;
+			VertexInputState vertexInputState = graphicsPipelineCreateInfo.VertexInputState;
+			GraphicsPipelineAttachmentInfo attachmentInfo = graphicsPipelineCreateInfo.AttachmentInfo;
+			BlendConstants blendConstants = graphicsPipelineCreateInfo.BlendConstants;
 
-			var vertexAttributes = (SDL_Gpu.VertexAttribute*) NativeMemory.Alloc(
+			var vertexAttributesHandle = GCHandle.Alloc(
-				(nuint) (graphicsPipelineCreateInfo.VertexInputState.VertexAttributes.Length * Marshal.SizeOf<SDL_Gpu.VertexAttribute>())
+				vertexInputState.VertexAttributes,
+				GCHandleType.Pinned
+			);
+			var vertexBindingsHandle = GCHandle.Alloc(
+				vertexInputState.VertexBindings,
+				GCHandleType.Pinned
 			);
 
-			for (var i = 0; i < graphicsPipelineCreateInfo.VertexInputState.VertexAttributes.Length; i += 1)
+			var colorAttachmentDescriptions = stackalloc Refresh.ColorAttachmentDescription[
-			{
+				(int) attachmentInfo.ColorAttachmentDescriptions.Length
-				vertexAttributes[i] = graphicsPipelineCreateInfo.VertexInputState.VertexAttributes[i].ToSDL();
-			}
-
-			var vertexBindings = (SDL_Gpu.VertexBinding*) NativeMemory.Alloc(
-				(nuint) (graphicsPipelineCreateInfo.VertexInputState.VertexBindings.Length * Marshal.SizeOf<SDL_Gpu.VertexBinding>())
-			);
-
-			for (var i = 0; i < graphicsPipelineCreateInfo.VertexInputState.VertexBindings.Length; i += 1)
-			{
-				vertexBindings[i] = graphicsPipelineCreateInfo.VertexInputState.VertexBindings[i].ToSDL();
-			}
-
-			var colorAttachmentDescriptions = stackalloc SDL_Gpu.ColorAttachmentDescription[
-				graphicsPipelineCreateInfo.AttachmentInfo.ColorAttachmentDescriptions.Length
 			];
 
-			for (var i = 0; i < graphicsPipelineCreateInfo.AttachmentInfo.ColorAttachmentDescriptions.Length; i += 1)
+			for (var i = 0; i < attachmentInfo.ColorAttachmentDescriptions.Length; i += 1)
 			{
-				colorAttachmentDescriptions[i].Format = (SDL_Gpu.TextureFormat) graphicsPipelineCreateInfo.AttachmentInfo.ColorAttachmentDescriptions[i].Format;
+				colorAttachmentDescriptions[i].format = (Refresh.TextureFormat) attachmentInfo.ColorAttachmentDescriptions[i].Format;
-				colorAttachmentDescriptions[i].BlendState = graphicsPipelineCreateInfo.AttachmentInfo.ColorAttachmentDescriptions[i].BlendState.ToSDL();
+				colorAttachmentDescriptions[i].blendState = attachmentInfo.ColorAttachmentDescriptions[i].BlendState.ToRefresh();
 			}
 
-			sdlGraphicsPipelineCreateInfo.VertexShader = graphicsPipelineCreateInfo.VertexShader.Handle;
+			Refresh.GraphicsPipelineCreateInfo refreshGraphicsPipelineCreateInfo;
-			sdlGraphicsPipelineCreateInfo.FragmentShader = graphicsPipelineCreateInfo.FragmentShader.Handle;
 
-			sdlGraphicsPipelineCreateInfo.VertexInputState.VertexAttributes = vertexAttributes;
+			refreshGraphicsPipelineCreateInfo.blendConstants[0] = blendConstants.R;
-			sdlGraphicsPipelineCreateInfo.VertexInputState.VertexAttributeCount = (uint) graphicsPipelineCreateInfo.VertexInputState.VertexAttributes.Length;
+			refreshGraphicsPipelineCreateInfo.blendConstants[1] = blendConstants.G;
-			sdlGraphicsPipelineCreateInfo.VertexInputState.VertexBindings = vertexBindings;
+			refreshGraphicsPipelineCreateInfo.blendConstants[2] = blendConstants.B;
-			sdlGraphicsPipelineCreateInfo.VertexInputState.VertexBindingCount = (uint) graphicsPipelineCreateInfo.VertexInputState.VertexBindings.Length;
+			refreshGraphicsPipelineCreateInfo.blendConstants[3] = blendConstants.A;
 
-			sdlGraphicsPipelineCreateInfo.PrimitiveType = (SDL_Gpu.PrimitiveType) graphicsPipelineCreateInfo.PrimitiveType;
+			refreshGraphicsPipelineCreateInfo.depthStencilState.backStencilState = depthStencilState.BackStencilState.ToRefresh();
+			refreshGraphicsPipelineCreateInfo.depthStencilState.compareOp = (Refresh.CompareOp) depthStencilState.CompareOp;
+			refreshGraphicsPipelineCreateInfo.depthStencilState.depthBoundsTestEnable = Conversions.BoolToByte(depthStencilState.DepthBoundsTestEnable);
+			refreshGraphicsPipelineCreateInfo.depthStencilState.depthTestEnable = Conversions.BoolToByte(depthStencilState.DepthTestEnable);
+			refreshGraphicsPipelineCreateInfo.depthStencilState.depthWriteEnable = Conversions.BoolToByte(depthStencilState.DepthWriteEnable);
+			refreshGraphicsPipelineCreateInfo.depthStencilState.frontStencilState = depthStencilState.FrontStencilState.ToRefresh();
+			refreshGraphicsPipelineCreateInfo.depthStencilState.maxDepthBounds = depthStencilState.MaxDepthBounds;
+			refreshGraphicsPipelineCreateInfo.depthStencilState.minDepthBounds = depthStencilState.MinDepthBounds;
+			refreshGraphicsPipelineCreateInfo.depthStencilState.stencilTestEnable = Conversions.BoolToByte(depthStencilState.StencilTestEnable);
 
-			sdlGraphicsPipelineCreateInfo.RasterizerState = graphicsPipelineCreateInfo.RasterizerState.ToSDL();
+			refreshGraphicsPipelineCreateInfo.vertexShaderInfo.entryPointName = vertexShaderInfo.EntryPointName;
-			sdlGraphicsPipelineCreateInfo.MultisampleState = graphicsPipelineCreateInfo.MultisampleState.ToSDL();
+			refreshGraphicsPipelineCreateInfo.vertexShaderInfo.shaderModule = vertexShaderInfo.ShaderModule.Handle;
-			sdlGraphicsPipelineCreateInfo.DepthStencilState = graphicsPipelineCreateInfo.DepthStencilState.ToSDL();
+			refreshGraphicsPipelineCreateInfo.vertexShaderInfo.uniformBufferSize = vertexShaderInfo.UniformBufferSize;
+			refreshGraphicsPipelineCreateInfo.vertexShaderInfo.samplerBindingCount = vertexShaderInfo.SamplerBindingCount;
 
-			sdlGraphicsPipelineCreateInfo.AttachmentInfo.ColorAttachmentCount = (uint) graphicsPipelineCreateInfo.AttachmentInfo.ColorAttachmentDescriptions.Length;
+			refreshGraphicsPipelineCreateInfo.fragmentShaderInfo.entryPointName = fragmentShaderInfo.EntryPointName;
-			sdlGraphicsPipelineCreateInfo.AttachmentInfo.ColorAttachmentDescriptions = colorAttachmentDescriptions;
+			refreshGraphicsPipelineCreateInfo.fragmentShaderInfo.shaderModule = fragmentShaderInfo.ShaderModule.Handle;
-			sdlGraphicsPipelineCreateInfo.AttachmentInfo.DepthStencilFormat = (SDL_Gpu.TextureFormat) graphicsPipelineCreateInfo.AttachmentInfo.DepthStencilFormat;
+			refreshGraphicsPipelineCreateInfo.fragmentShaderInfo.uniformBufferSize = fragmentShaderInfo.UniformBufferSize;
-			sdlGraphicsPipelineCreateInfo.AttachmentInfo.HasDepthStencilAttachment = Conversions.BoolToInt(graphicsPipelineCreateInfo.AttachmentInfo.HasDepthStencilAttachment);
+			refreshGraphicsPipelineCreateInfo.fragmentShaderInfo.samplerBindingCount = fragmentShaderInfo.SamplerBindingCount;
 
-			sdlGraphicsPipelineCreateInfo.VertexResourceInfo = graphicsPipelineCreateInfo.VertexShaderResourceInfo.ToSDL();
+			refreshGraphicsPipelineCreateInfo.multisampleState.multisampleCount = (Refresh.SampleCount) multisampleState.MultisampleCount;
-			sdlGraphicsPipelineCreateInfo.FragmentResourceInfo = graphicsPipelineCreateInfo.FragmentShaderResourceInfo.ToSDL();
+			refreshGraphicsPipelineCreateInfo.multisampleState.sampleMask = multisampleState.SampleMask;
 
-			sdlGraphicsPipelineCreateInfo.BlendConstants[0] = graphicsPipelineCreateInfo.BlendConstants.R;
+			refreshGraphicsPipelineCreateInfo.rasterizerState.cullMode = (Refresh.CullMode) rasterizerState.CullMode;
-			sdlGraphicsPipelineCreateInfo.BlendConstants[1] = graphicsPipelineCreateInfo.BlendConstants.G;
+			refreshGraphicsPipelineCreateInfo.rasterizerState.depthBiasClamp = rasterizerState.DepthBiasClamp;
-			sdlGraphicsPipelineCreateInfo.BlendConstants[2] = graphicsPipelineCreateInfo.BlendConstants.B;
+			refreshGraphicsPipelineCreateInfo.rasterizerState.depthBiasConstantFactor = rasterizerState.DepthBiasConstantFactor;
-			sdlGraphicsPipelineCreateInfo.BlendConstants[3] = graphicsPipelineCreateInfo.BlendConstants.A;
+			refreshGraphicsPipelineCreateInfo.rasterizerState.depthBiasEnable = Conversions.BoolToByte(rasterizerState.DepthBiasEnable);
+			refreshGraphicsPipelineCreateInfo.rasterizerState.depthBiasSlopeFactor = rasterizerState.DepthBiasSlopeFactor;
+			refreshGraphicsPipelineCreateInfo.rasterizerState.fillMode = (Refresh.FillMode) rasterizerState.FillMode;
+			refreshGraphicsPipelineCreateInfo.rasterizerState.frontFace = (Refresh.FrontFace) rasterizerState.FrontFace;
 
-			Handle = SDL_Gpu.SDL_GpuCreateGraphicsPipeline(device.Handle, sdlGraphicsPipelineCreateInfo);
+			refreshGraphicsPipelineCreateInfo.vertexInputState.vertexAttributes = vertexAttributesHandle.AddrOfPinnedObject();
+			refreshGraphicsPipelineCreateInfo.vertexInputState.vertexAttributeCount = (uint) vertexInputState.VertexAttributes.Length;
+			refreshGraphicsPipelineCreateInfo.vertexInputState.vertexBindings = vertexBindingsHandle.AddrOfPinnedObject();
+			refreshGraphicsPipelineCreateInfo.vertexInputState.vertexBindingCount = (uint) vertexInputState.VertexBindings.Length;
+
+			refreshGraphicsPipelineCreateInfo.primitiveType = (Refresh.PrimitiveType) primitiveType;
+
+			refreshGraphicsPipelineCreateInfo.attachmentInfo.colorAttachmentCount = (uint) attachmentInfo.ColorAttachmentDescriptions.Length;
+			refreshGraphicsPipelineCreateInfo.attachmentInfo.colorAttachmentDescriptions = (IntPtr) colorAttachmentDescriptions;
+			refreshGraphicsPipelineCreateInfo.attachmentInfo.depthStencilFormat = (Refresh.TextureFormat) attachmentInfo.DepthStencilFormat;
+			refreshGraphicsPipelineCreateInfo.attachmentInfo.hasDepthStencilAttachment = Conversions.BoolToByte(attachmentInfo.HasDepthStencilAttachment);
+
+			Handle = Refresh.Refresh_CreateGraphicsPipeline(device.Handle, refreshGraphicsPipelineCreateInfo);
 			if (Handle == IntPtr.Zero)
 			{
 				throw new Exception("Could not create graphics pipeline!");
 			}
 
-			NativeMemory.Free(vertexAttributes);
+			vertexAttributesHandle.Free();
-			NativeMemory.Free(vertexBindings);
+			vertexBindingsHandle.Free();
 
-			VertexShaderResourceInfo = graphicsPipelineCreateInfo.VertexShaderResourceInfo;
+			VertexShaderInfo = vertexShaderInfo;
-			FragmentShaderResourceInfo = graphicsPipelineCreateInfo.FragmentShaderResourceInfo;
+			FragmentShaderInfo = fragmentShaderInfo;
-			SampleCount = graphicsPipelineCreateInfo.MultisampleState.MultisampleCount;
+			SampleCount = multisampleState.MultisampleCount;
 
 #if DEBUG
-			AttachmentInfo = graphicsPipelineCreateInfo.AttachmentInfo;
+			AttachmentInfo = attachmentInfo;
 #endif
 		}
 	}

src/Graphics/Resources/Sampler.cs

@@ -1,23 +1,24 @@
 using System;
-using SDL2_gpuCS;
+using RefreshCS;
 
-namespace MoonWorks.Graphics;
+namespace MoonWorks.Graphics
-
-/// <summary>
-/// A sampler specifies how a texture will be sampled in a shader.
-/// </summary>
-public class Sampler : SDL_GpuResource
 {
-	protected override Action<IntPtr, IntPtr> ReleaseFunction => SDL_Gpu.SDL_GpuReleaseSampler;
+	/// <summary>
+	/// A sampler specifies how a texture will be sampled in a shader.
+	/// </summary>
+	public class Sampler : RefreshResource
+	{
+		protected override Action<IntPtr, IntPtr> QueueDestroyFunction => Refresh.Refresh_QueueDestroySampler;
 
 		public Sampler(
 			GraphicsDevice device,
 			in SamplerCreateInfo samplerCreateInfo
 		) : base(device)
 		{
-		Handle = SDL_Gpu.SDL_GpuCreateSampler(
+			Handle = Refresh.Refresh_CreateSampler(
 				device.Handle,
-			samplerCreateInfo.ToSDL()
+				samplerCreateInfo.ToRefreshSamplerStateCreateInfo()
 			);
 		}
+	}
 }

src/Graphics/Resources/Shader.cs

@@ -1,65 +0,0 @@
-using SDL2_gpuCS;
-using System;
-using System.IO;
-using System.Runtime.InteropServices;
-
-namespace MoonWorks.Graphics
-{
-	/// <summary>
-	/// Shader modules expect input in Refresh bytecode format.
-	/// </summary>
-	public class Shader : SDL_GpuResource
-	{
-		protected override Action<IntPtr, IntPtr> ReleaseFunction => SDL_Gpu.SDL_GpuReleaseShader;
-
-		public unsafe Shader(
-			GraphicsDevice device,
-			string filePath,
-			string entryPointName,
-			ShaderStage shaderStage,
-			ShaderFormat shaderFormat
-		) : base(device)
-		{
-			using var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
-			Handle = CreateFromStream(device, stream, entryPointName, shaderStage, shaderFormat);
-		}
-
-		public unsafe Shader(
-			GraphicsDevice device,
-			Stream stream,
-			string entryPointName,
-			ShaderStage shaderStage,
-			ShaderFormat shaderFormat
-		) : base(device)
-		{
-			Handle = CreateFromStream(device, stream, entryPointName, shaderStage, shaderFormat);
-		}
-
-		private static unsafe IntPtr CreateFromStream(
-			GraphicsDevice device,
-			Stream stream,
-			string entryPointName,
-			ShaderStage shaderStage,
-			ShaderFormat shaderFormat
-		) {
-			var bytecodeBuffer = NativeMemory.Alloc((nuint) stream.Length);
-			var bytecodeSpan = new Span<byte>(bytecodeBuffer, (int) stream.Length);
-			stream.ReadExactly(bytecodeSpan);
-
-			SDL_Gpu.ShaderCreateInfo shaderCreateInfo;
-			shaderCreateInfo.CodeSize = (nuint) stream.Length;
-			shaderCreateInfo.Code = (byte*) bytecodeBuffer;
-			shaderCreateInfo.EntryPointName = entryPointName;
-			shaderCreateInfo.Stage = (SDL_Gpu.ShaderStage) shaderStage;
-			shaderCreateInfo.Format = (SDL_Gpu.ShaderFormat) shaderFormat;
-
-			var shaderModule = SDL_Gpu.SDL_GpuCreateShader(
-				device.Handle,
-				shaderCreateInfo
-			);
-
-			NativeMemory.Free(bytecodeBuffer);
-			return shaderModule;
-		}
-	}
-}

src/Graphics/Resources/ShaderModule.cs

@@ -0,0 +1,42 @@
+using RefreshCS;
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+
+namespace MoonWorks.Graphics
+{
+	/// <summary>
+	/// Shader modules expect input in Refresh bytecode format.
+	/// </summary>
+	public class ShaderModule : RefreshResource
+	{
+		protected override Action<IntPtr, IntPtr> QueueDestroyFunction => Refresh.Refresh_QueueDestroyShaderModule;
+
+		public unsafe ShaderModule(GraphicsDevice device, string filePath) : base(device)
+		{
+			using var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
+			Handle = CreateFromStream(device, stream);
+		}
+
+		public unsafe ShaderModule(GraphicsDevice device, Stream stream) : base(device)
+		{
+			Handle = CreateFromStream(device, stream);
+		}
+
+		private static unsafe IntPtr CreateFromStream(GraphicsDevice device, Stream stream)
+		{
+			var bytecodeBuffer = NativeMemory.Alloc((nuint) stream.Length);
+			var bytecodeSpan = new Span<byte>(bytecodeBuffer, (int) stream.Length);
+			stream.ReadExactly(bytecodeSpan);
+
+			Refresh.ShaderModuleCreateInfo shaderModuleCreateInfo;
+			shaderModuleCreateInfo.codeSize = (nuint) stream.Length;
+			shaderModuleCreateInfo.byteCode = (nint) bytecodeBuffer;
+
+			var shaderModule = Refresh.Refresh_CreateShaderModule(device.Handle, shaderModuleCreateInfo);
+
+			NativeMemory.Free(bytecodeBuffer);
+			return shaderModule;
+		}
+	}
+}

src/Graphics/Resources/Texture.cs

@@ -1,47 +1,183 @@
 using System;
 using System.IO;
-using SDL2_gpuCS;
+using System.Runtime.InteropServices;
+using RefreshCS;
 
 namespace MoonWorks.Graphics
 {
 	/// <summary>
 	/// A container for pixel data.
 	/// </summary>
-	public class Texture : SDL_GpuResource
+	public class Texture : RefreshResource
 	{
 		public uint Width { get; internal set; }
 		public uint Height { get; internal set; }
 		public uint Depth { get; }
 		public TextureFormat Format { get; internal set; }
 		public bool IsCube { get; }
-		public uint LayerCount { get; }
 		public uint LevelCount { get; }
 		public SampleCount SampleCount { get; }
 		public TextureUsageFlags UsageFlags { get; }
 		public uint Size { get; }
 
-		private string name;
-		public string Name
-		{
-			get => name;
-
-			set
-			{
-				if (Device.DebugMode)
-				{
-					SDL_Gpu.SDL_GpuSetTextureName(
-						Device.Handle,
-						Handle,
-						value
-					);
-				}
-
-				name = value;
-			}
-		}
-
 		// FIXME: this allocates a delegate instance
-		protected override Action<IntPtr, IntPtr> ReleaseFunction => SDL_Gpu.SDL_GpuReleaseTexture;
+		protected override Action<IntPtr, IntPtr> QueueDestroyFunction => Refresh.Refresh_QueueDestroyTexture;
+
+		/// <summary>
+		/// Creates a 2D Texture using PNG or QOI data from raw byte data.
+		/// </summary>
+		public static unsafe Texture FromImageBytes(
+			GraphicsDevice device,
+			CommandBuffer commandBuffer,
+			Span<byte> data
+		) {
+			Texture texture;
+
+			fixed (byte *dataPtr = data)
+			{
+				var pixels = Refresh.Refresh_Image_Load((nint) dataPtr, data.Length, out var width, out var height, out var len);
+
+				TextureCreateInfo textureCreateInfo = new TextureCreateInfo();
+				textureCreateInfo.Width = (uint) width;
+				textureCreateInfo.Height = (uint) height;
+				textureCreateInfo.Depth = 1;
+				textureCreateInfo.Format = TextureFormat.R8G8B8A8;
+				textureCreateInfo.IsCube = false;
+				textureCreateInfo.LevelCount = 1;
+				textureCreateInfo.SampleCount = SampleCount.One;
+				textureCreateInfo.UsageFlags = TextureUsageFlags.Sampler;
+
+				texture = new Texture(device, textureCreateInfo);
+				commandBuffer.SetTextureData(texture, pixels, (uint) len);
+
+				Refresh.Refresh_Image_Free(pixels);
+			}
+
+			return texture;
+		}
+
+		/// <summary>
+		/// Creates a 2D Texture using PNG or QOI data from a stream.
+		/// </summary>
+		public static unsafe Texture FromImageStream(
+			GraphicsDevice device,
+			CommandBuffer commandBuffer,
+			Stream stream
+		) {
+			var length = stream.Length;
+			var buffer = NativeMemory.Alloc((nuint) length);
+			var span = new Span<byte>(buffer, (int) length);
+			stream.ReadExactly(span);
+
+			var texture = FromImageBytes(device, commandBuffer, span);
+
+			NativeMemory.Free((void*) buffer);
+
+			return texture;
+		}
+
+		/// <summary>
+		/// Creates a 2D Texture using PNG or QOI data from a file.
+		/// </summary>
+		public static Texture FromImageFile(
+			GraphicsDevice device,
+			CommandBuffer commandBuffer,
+			string path
+		) {
+			var fileStream = new FileStream(path, FileMode.Open, FileAccess.Read);
+			return FromImageStream(device, commandBuffer, fileStream);
+		}
+
+		public static unsafe void SetDataFromImageBytes(
+			CommandBuffer commandBuffer,
+			TextureSlice textureSlice,
+			Span<byte> data
+		) {
+			fixed (byte* ptr = data)
+			{
+				var pixels = Refresh.Refresh_Image_Load(
+					(nint) ptr,
+					(int) data.Length,
+					out var w,
+					out var h,
+					out var len
+				);
+
+				commandBuffer.SetTextureData(textureSlice, pixels, (uint) len);
+
+				Refresh.Refresh_Image_Free(pixels);
+			}
+		}
+
+		/// <summary>
+		/// Sets data for a texture slice using PNG or QOI data from a stream.
+		/// </summary>
+		public static unsafe void SetDataFromImageStream(
+			CommandBuffer commandBuffer,
+			TextureSlice textureSlice,
+			Stream stream
+		) {
+			var length = stream.Length;
+			var buffer = NativeMemory.Alloc((nuint) length);
+			var span = new Span<byte>(buffer, (int) length);
+			stream.ReadExactly(span);
+
+			SetDataFromImageBytes(commandBuffer, textureSlice, span);
+
+			NativeMemory.Free((void*) buffer);
+		}
+
+		/// <summary>
+		/// Sets data for a texture slice using PNG or QOI data from a file.
+		/// </summary>
+		public static void SetDataFromImageFile(
+			CommandBuffer commandBuffer,
+			TextureSlice textureSlice,
+			string path
+		) {
+			var fileStream = new FileStream(path, FileMode.Open, FileAccess.Read);
+			SetDataFromImageStream(commandBuffer, textureSlice, fileStream);
+		}
+
+		public unsafe static Texture LoadDDS(GraphicsDevice graphicsDevice, CommandBuffer commandBuffer, System.IO.Stream stream)
+		{
+			using var reader = new BinaryReader(stream);
+			Texture texture;
+			int faces;
+			ParseDDS(reader, out var format, out var width, out var height, out var levels, out var isCube);
+
+			if (isCube)
+			{
+				texture = CreateTextureCube(graphicsDevice, (uint) width, format, TextureUsageFlags.Sampler, (uint) levels);
+				faces = 6;
+			}
+			else
+			{
+				texture = CreateTexture2D(graphicsDevice, (uint) width, (uint) height, format, TextureUsageFlags.Sampler, (uint) levels);
+				faces = 1;
+			}
+
+			for (int i = 0; i < faces; i += 1)
+			{
+				for (int j = 0; j < levels; j += 1)
+				{
+					var levelWidth = width >> j;
+					var levelHeight = height >> j;
+
+					var levelSize = CalculateDDSLevelSize(levelWidth, levelHeight, format);
+					var byteBuffer = NativeMemory.Alloc((nuint) levelSize);
+					var byteSpan = new Span<byte>(byteBuffer, levelSize);
+					stream.ReadExactly(byteSpan);
+
+					var textureSlice = new TextureSlice(texture, new Rect(0, 0, levelWidth, levelHeight), 0, (uint) i, (uint) j);
+					commandBuffer.SetTextureData(textureSlice, (nint) byteBuffer, (uint) levelSize);
+
+					NativeMemory.Free(byteBuffer);
+				}
+			}
+
+			return texture;
+		}
 
 		/// <summary>
 		/// Creates a 2D texture.
@@ -67,7 +203,6 @@ namespace MoonWorks.Graphics
 				Height = height,
 				Depth = 1,
 				IsCube = false,
-				LayerCount = 1,
 				LevelCount = levelCount,
 				SampleCount = sampleCount,
 				Format = format,
@@ -78,43 +213,15 @@ namespace MoonWorks.Graphics
 		}
 
 		/// <summary>
-		/// Creates a 2D texture array.
+		/// Creates a 3D texture.
 		/// </summary>
 		/// <param name="device">An initialized GraphicsDevice.</param>
 		/// <param name="width">The width of the texture.</param>
 		/// <param name="height">The height of the texture.</param>
-		/// <param name="layerCount">The layer count of the texture.</param>
+		/// <param name="depth">The depth of the texture.</param>
 		/// <param name="format">The format of the texture.</param>
 		/// <param name="usageFlags">Specifies how the texture will be used.</param>
 		/// <param name="levelCount">Specifies the number of mip levels.</param>
-		public static Texture CreateTexture2DArray(
-			GraphicsDevice device,
-			uint width,
-			uint height,
-			uint layerCount,
-			TextureFormat format,
-			TextureUsageFlags usageFlags,
-			uint levelCount = 1
-		) {
-			var textureCreateInfo = new TextureCreateInfo
-			{
-				Width = width,
-				Height = height,
-				Depth = 1,
-				IsCube = false,
-				LayerCount = layerCount,
-				LevelCount = levelCount,
-				Format = format,
-				UsageFlags = usageFlags
-			};
-
-			return new Texture(device, textureCreateInfo);
-		}
-
-		/// <summary>
-		/// Creates a 3D texture.
-		/// Note that the width, height and depth all form one slice and cannot be subdivided in a texture slice.
-		/// </summary>
 		public static Texture CreateTexture3D(
 			GraphicsDevice device,
 			uint width,
@@ -130,7 +237,6 @@ namespace MoonWorks.Graphics
 				Height = height,
 				Depth = depth,
 				IsCube = false,
-				LayerCount = 1,
 				LevelCount = levelCount,
 				Format = format,
 				UsageFlags = usageFlags
@@ -160,7 +266,6 @@ namespace MoonWorks.Graphics
 				Height = size,
 				Depth = 1,
 				IsCube = true,
-				LayerCount = 6,
 				LevelCount = levelCount,
 				Format = format,
 				UsageFlags = usageFlags
@@ -179,9 +284,9 @@ namespace MoonWorks.Graphics
 			in TextureCreateInfo textureCreateInfo
 		) : base(device)
 		{
-			Handle = SDL_Gpu.SDL_GpuCreateTexture(
+			Handle = Refresh.Refresh_CreateTexture(
 				device.Handle,
-				textureCreateInfo.ToSDL()
+				textureCreateInfo.ToRefreshTextureCreateInfo()
 			);
 
 			Format = textureCreateInfo.Format;
@@ -189,15 +294,16 @@ namespace MoonWorks.Graphics
 			Height = textureCreateInfo.Height;
 			Depth = textureCreateInfo.Depth;
 			IsCube = textureCreateInfo.IsCube;
-			LayerCount = textureCreateInfo.LayerCount;
 			LevelCount = textureCreateInfo.LevelCount;
 			SampleCount = textureCreateInfo.SampleCount;
 			UsageFlags = textureCreateInfo.UsageFlags;
 			Size = Width * Height * BytesPerPixel(Format) / BlockSizeSquared(Format);
-			name = "";
 		}
 
-		// Used by Window. Swapchain texture handles are managed by the driver backend.
+		public static implicit operator TextureSlice(Texture t) => new TextureSlice(t);
+
+		// Used by AcquireSwapchainTexture.
+		// Should not be tracked, because swapchain textures are managed by Vulkan.
 		internal Texture(
 			GraphicsDevice device,
 			TextureFormat format
@@ -216,6 +322,333 @@ namespace MoonWorks.Graphics
 			Size = Width * Height * BytesPerPixel(Format) / BlockSizeSquared(Format);
 		}
 
+		// DDS loading extension, based on MojoDDS
+		// Taken from https://github.com/FNA-XNA/FNA/blob/1e49f868f595f62bc6385db45949a03186a7cd7f/src/Graphics/Texture.cs#L194
+		private static void ParseDDS(
+			BinaryReader reader,
+			out TextureFormat format,
+			out int width,
+			out int height,
+			out int levels,
+			out bool isCube
+		) {
+			// A whole bunch of magic numbers, yay DDS!
+			const uint DDS_MAGIC = 0x20534444;
+			const uint DDS_HEADERSIZE = 124;
+			const uint DDS_PIXFMTSIZE = 32;
+			const uint DDSD_HEIGHT = 0x2;
+			const uint DDSD_WIDTH = 0x4;
+			const uint DDSD_PITCH = 0x8;
+			const uint DDSD_LINEARSIZE = 0x80000;
+			const uint DDSD_REQ = (
+				DDSD_HEIGHT | DDSD_WIDTH
+			);
+			const uint DDSCAPS_MIPMAP = 0x400000;
+			const uint DDSCAPS_TEXTURE = 0x1000;
+			const uint DDSCAPS2_CUBEMAP = 0x200;
+			const uint DDPF_FOURCC = 0x4;
+			const uint DDPF_RGB = 0x40;
+			const uint FOURCC_DXT1 = 0x31545844;
+			const uint FOURCC_DXT3 = 0x33545844;
+			const uint FOURCC_DXT5 = 0x35545844;
+			const uint FOURCC_DX10 = 0x30315844;
+			const uint pitchAndLinear = (
+				DDSD_PITCH | DDSD_LINEARSIZE
+			);
+
+			// File should start with 'DDS '
+			if (reader.ReadUInt32() != DDS_MAGIC)
+			{
+				throw new NotSupportedException("Not a DDS!");
+			}
+
+			// Texture info
+			uint size = reader.ReadUInt32();
+			if (size != DDS_HEADERSIZE)
+			{
+				throw new NotSupportedException("Invalid DDS header!");
+			}
+			uint flags = reader.ReadUInt32();
+			if ((flags & DDSD_REQ) != DDSD_REQ)
+			{
+				throw new NotSupportedException("Invalid DDS flags!");
+			}
+			if ((flags & pitchAndLinear) == pitchAndLinear)
+			{
+				throw new NotSupportedException("Invalid DDS flags!");
+			}
+			height = reader.ReadInt32();
+			width = reader.ReadInt32();
+			reader.ReadUInt32(); // dwPitchOrLinearSize, unused
+			reader.ReadUInt32(); // dwDepth, unused
+			levels = reader.ReadInt32();
+
+			// "Reserved"
+			reader.ReadBytes(4 * 11);
+
+			// Format info
+			uint formatSize = reader.ReadUInt32();
+			if (formatSize != DDS_PIXFMTSIZE)
+			{
+				throw new NotSupportedException("Bogus PIXFMTSIZE!");
+			}
+			uint formatFlags = reader.ReadUInt32();
+			uint formatFourCC = reader.ReadUInt32();
+			uint formatRGBBitCount = reader.ReadUInt32();
+			uint formatRBitMask = reader.ReadUInt32();
+			uint formatGBitMask = reader.ReadUInt32();
+			uint formatBBitMask = reader.ReadUInt32();
+			uint formatABitMask = reader.ReadUInt32();
+
+			// dwCaps "stuff"
+			uint caps = reader.ReadUInt32();
+			if ((caps & DDSCAPS_TEXTURE) == 0)
+			{
+				throw new NotSupportedException("Not a texture!");
+			}
+
+			isCube = false;
+
+			uint caps2 = reader.ReadUInt32();
+			if (caps2 != 0)
+			{
+				if ((caps2 & DDSCAPS2_CUBEMAP) == DDSCAPS2_CUBEMAP)
+				{
+					isCube = true;
+				}
+				else
+				{
+					throw new NotSupportedException("Invalid caps2!");
+				}
+			}
+
+			reader.ReadUInt32(); // dwCaps3, unused
+			reader.ReadUInt32(); // dwCaps4, unused
+
+			// "Reserved"
+			reader.ReadUInt32();
+
+			// Mipmap sanity check
+			if ((caps & DDSCAPS_MIPMAP) != DDSCAPS_MIPMAP)
+			{
+				levels = 1;
+			}
+
+			// Determine texture format
+			if ((formatFlags & DDPF_FOURCC) == DDPF_FOURCC)
+			{
+				switch (formatFourCC)
+				{
+					case 0x71: // D3DFMT_A16B16G16R16F
+						format = TextureFormat.R16G16B16A16_SFLOAT;
+						break;
+					case 0x74: // D3DFMT_A32B32G32R32F
+						format = TextureFormat.R32G32B32A32_SFLOAT;
+						break;
+					case FOURCC_DXT1:
+						format = TextureFormat.BC1;
+						break;
+					case FOURCC_DXT3:
+						format = TextureFormat.BC2;
+						break;
+					case FOURCC_DXT5:
+						format = TextureFormat.BC3;
+						break;
+					case FOURCC_DX10:
+						// If the fourCC is DX10, there is an extra header with additional format information.
+						uint dxgiFormat = reader.ReadUInt32();
+
+						// These values are taken from the DXGI_FORMAT enum.
+						switch (dxgiFormat)
+						{
+							case 2:
+								format = TextureFormat.R32G32B32A32_SFLOAT;
+								break;
+
+							case 10:
+								format = TextureFormat.R16G16B16A16_SFLOAT;
+								break;
+
+							case 71:
+								format = TextureFormat.BC1;
+								break;
+
+							case 74:
+								format = TextureFormat.BC2;
+								break;
+
+							case 77:
+								format = TextureFormat.BC3;
+								break;
+
+							case 98:
+								format = TextureFormat.BC7;
+								break;
+
+							default:
+								throw new NotSupportedException(
+									"Unsupported DDS texture format"
+								);
+						}
+
+						uint resourceDimension = reader.ReadUInt32();
+
+						// These values are taken from the D3D10_RESOURCE_DIMENSION enum.
+						switch (resourceDimension)
+						{
+							case 0: // Unknown
+							case 1: // Buffer
+								throw new NotSupportedException(
+									"Unsupported DDS texture format"
+								);
+							default:
+								break;
+						}
+
+						/*
+						 * This flag seemingly only indicates if the texture is a cube map.
+						 * This is already determined above. Cool!
+						 */
+						uint miscFlag = reader.ReadUInt32();
+
+						/*
+						 * Indicates the number of elements in the texture array.
+						 * We don't support texture arrays so just throw if it's greater than 1.
+						 */
+						uint arraySize = reader.ReadUInt32();
+
+						if (arraySize > 1)
+						{
+							throw new NotSupportedException(
+								"Unsupported DDS texture format"
+							);
+						}
+
+						reader.ReadUInt32(); // reserved
+
+						break;
+					default:
+						throw new NotSupportedException(
+							"Unsupported DDS texture format"
+						);
+				}
+			}
+			else if ((formatFlags & DDPF_RGB) == DDPF_RGB)
+			{
+				if (	formatRGBBitCount != 32 ||
+					formatRBitMask != 0x00FF0000 ||
+					formatGBitMask != 0x0000FF00 ||
+					formatBBitMask != 0x000000FF ||
+					formatABitMask != 0xFF000000	)
+				{
+					throw new NotSupportedException(
+						"Unsupported DDS texture format"
+					);
+				}
+
+				format = TextureFormat.B8G8R8A8;
+			}
+			else
+			{
+				throw new NotSupportedException(
+					"Unsupported DDS texture format"
+				);
+			}
+		}
+
+		private static int CalculateDDSLevelSize(
+			int width,
+			int height,
+			TextureFormat format
+		) {
+			if (format == TextureFormat.R8G8B8A8)
+			{
+				return (((width * 32) + 7) / 8) * height;
+			}
+			else if (format == TextureFormat.R16G16B16A16_SFLOAT)
+			{
+				return (((width * 64) + 7) / 8) * height;
+			}
+			else if (format == TextureFormat.R32G32B32A32_SFLOAT)
+			{
+				return (((width * 128) + 7) / 8) * height;
+			}
+			else
+			{
+				int blockSize = 16;
+				if (format == TextureFormat.BC1)
+				{
+					blockSize = 8;
+				}
+				width = System.Math.Max(width, 1);
+				height = System.Math.Max(height, 1);
+				return (
+					((width + 3) / 4) *
+					((height + 3) / 4) *
+					blockSize
+				);
+			}
+		}
+
+		/// <summary>
+		/// Asynchronously saves RGBA or BGRA pixel data to a file in PNG format. <br/>
+		/// Warning: this is expensive and will block to wait for data download from GPU! <br/>
+		/// You can avoid blocking by calling this method from a thread.
+		/// </summary>
+		public unsafe void SavePNG(string path)
+		{
+#if DEBUG
+			if (Format != TextureFormat.R8G8B8A8 && Format != TextureFormat.B8G8R8A8)
+			{
+				throw new ArgumentException("Texture format must be RGBA or BGRA!", "format");
+			}
+#endif
+
+			var buffer = new Buffer(Device, 0, Width * Height * 4); // this creates garbage... oh well
+
+			// immediately request the data copy
+			var commandBuffer = Device.AcquireCommandBuffer();
+			commandBuffer.CopyTextureToBuffer(this, buffer);
+			var fence = Device.SubmitAndAcquireFence(commandBuffer);
+
+			var byteCount = buffer.Size;
+
+			var pixelsPtr = NativeMemory.Alloc((nuint) byteCount);
+			var pixelsSpan = new Span<byte>(pixelsPtr, (int) byteCount);
+
+			Device.WaitForFences(fence); // make sure the data transfer is done...
+			Device.ReleaseFence(fence); // and then release the fence
+
+			buffer.GetData(pixelsSpan);
+
+			if (Format == TextureFormat.B8G8R8A8)
+			{
+				var rgbaPtr = NativeMemory.Alloc((nuint) byteCount);
+				var rgbaSpan = new Span<byte>(rgbaPtr, (int) byteCount);
+
+				for (var i = 0; i < byteCount; i += 4)
+				{
+					rgbaSpan[i] = pixelsSpan[i + 2];
+					rgbaSpan[i + 1] = pixelsSpan[i + 1];
+					rgbaSpan[i + 2] = pixelsSpan[i];
+					rgbaSpan[i + 3] = pixelsSpan[i + 3];
+				}
+
+				Refresh.Refresh_Image_SavePNG(path, (nint) rgbaPtr, (int) Width, (int) Height);
+
+				NativeMemory.Free((void*) rgbaPtr);
+			}
+			else
+			{
+				fixed (byte* ptr = pixelsSpan)
+				{
+					Refresh.Refresh_Image_SavePNG(path, (nint) ptr, (int) Width, (int) Height);
+				}
+			}
+
+			NativeMemory.Free(pixelsPtr);
+		}
+
 		public static uint BytesPerPixel(TextureFormat format)
 		{
 			switch (format)
@@ -230,8 +663,10 @@ namespace MoonWorks.Graphics
 				case TextureFormat.R8G8_SNORM:
 				case TextureFormat.R8G8_UINT:
 				case TextureFormat.R16_UINT:
-				case TextureFormat.D16_UNORM:
+				case TextureFormat.D16:
 					return 2;
+				case TextureFormat.D16S8:
+					return 3;
 				case TextureFormat.R8G8B8A8:
 				case TextureFormat.B8G8R8A8:
 				case TextureFormat.R32_SFLOAT:
@@ -241,10 +676,9 @@ namespace MoonWorks.Graphics
 				case TextureFormat.A2R10G10B10:
 				case TextureFormat.R8G8B8A8_UINT:
 				case TextureFormat.R16G16_UINT:
-				case TextureFormat.D24_UNORM_S8_UINT:
+				case TextureFormat.D32:
-				case TextureFormat.D32_SFLOAT:
 					return 4;
-				case TextureFormat.D32_SFLOAT_S8_UINT:
+				case TextureFormat.D32S8:
 					return 5;
 				case TextureFormat.R16G16B16A16_SFLOAT:
 				case TextureFormat.R16G16B16A16:
@@ -263,21 +697,6 @@ namespace MoonWorks.Graphics
 			}
 		}
 
-		public static uint TexelSize(TextureFormat format)
-		{
-			switch (format)
-			{
-				case TextureFormat.BC2:
-				case TextureFormat.BC3:
-				case TextureFormat.BC7:
-					return 16;
-				case TextureFormat.BC1:
-					return 8;
-				default:
-					return 1;
-			}
-		}
-
 		public static uint BlockSizeSquared(TextureFormat format)
 		{
 			switch (format)
@@ -310,19 +729,15 @@ namespace MoonWorks.Graphics
 				case TextureFormat.R16_UINT:
 				case TextureFormat.R16G16_UINT:
 				case TextureFormat.R16G16B16A16_UINT:
-				case TextureFormat.D16_UNORM:
+				case TextureFormat.D16:
-				case TextureFormat.D24_UNORM:
+				case TextureFormat.D32:
-				case TextureFormat.D24_UNORM_S8_UINT:
+				case TextureFormat.D16S8:
-				case TextureFormat.D32_SFLOAT:
+				case TextureFormat.D32S8:
-				case TextureFormat.D32_SFLOAT_S8_UINT:
 					return 1;
 				default:
 					Logger.LogError("Texture format not recognized!");
 					return 0;
 			}
 		}
-
-		public static implicit operator TextureSlice(Texture t) => new TextureSlice(t);
-		public static implicit operator TextureRegion(Texture t) => new TextureRegion(t);
 	}
 }

src/Graphics/Resources/TransferBuffer.cs

@@ -1,161 +0,0 @@
-using System;
-using System.Runtime.InteropServices;
-using SDL2_gpuCS;
-
-namespace MoonWorks.Graphics
-{
-	public unsafe class TransferBuffer : SDL_GpuResource
-	{
-		protected override Action<IntPtr, IntPtr> ReleaseFunction => SDL_Gpu.SDL_GpuReleaseTransferBuffer;
-
-		/// <summary>
-		/// Size in bytes.
-		/// </summary>
-		public uint Size { get; }
-
-		/// <summary>
-		/// Creates a buffer of requested size given a type and element count.
-		/// </summary>
-		/// <typeparam name="T">The type that the buffer will contain.</typeparam>
-		/// <param name="device">The GraphicsDevice.</param>
-		/// <param name="elementCount">How many elements of type T the buffer will contain.</param>
-		/// <returns></returns>
-		public unsafe static TransferBuffer Create<T>(
-			GraphicsDevice device,
-			TransferUsage usage,
-			TransferBufferMapFlags mapFlags,
-			uint elementCount
-		) where T : unmanaged
-		{
-			return new TransferBuffer(
-				device,
-				usage,
-				mapFlags,
-				(uint) Marshal.SizeOf<T>() * elementCount
-			);
-		}
-
-		/// <summary>
-		/// Creates a TransferBuffer.
-		/// </summary>
-		/// <param name="device">An initialized GraphicsDevice.</param>
-		/// <param name="sizeInBytes">The length of the buffer. Cannot be resized.</param>
-		/// <param name="usage">Whether this will be used to upload buffers or textures.</param>
-		public TransferBuffer(
-			GraphicsDevice device,
-			TransferUsage usage,
-			TransferBufferMapFlags mapFlags,
-			uint sizeInBytes
-		) : base(device)
-		{
-			Handle = SDL_Gpu.SDL_GpuCreateTransferBuffer(
-				device.Handle,
-				(SDL_Gpu.TransferUsage) usage,
-				(SDL_Gpu.TransferBufferMapFlags) mapFlags,
-				sizeInBytes
-			);
-			Size = sizeInBytes;
-		}
-
-		/// <summary>
-		/// Immediately copies data from a Span to the TransferBuffer.
-		/// Returns the length of the copy in bytes.
-		///
-		/// If cycle is set to true and this TransferBuffer was used in an Upload command,
-		/// that command will still use the corret data at the cost of increased memory usage.
-		///
-		/// If cycle is set to false, the data will be overwritten immediately,
-		/// which could cause a data race.
-		/// </summary>
-		public unsafe uint SetData<T>(
-			Span<T> data,
-			uint bufferOffsetInBytes,
-			bool cycle
-		) where T : unmanaged
-		{
-			var elementSize = Marshal.SizeOf<T>();
-			var dataLengthInBytes = (uint) (elementSize * data.Length);
-
-#if DEBUG
-			AssertBufferBoundsCheck(Size, bufferOffsetInBytes, dataLengthInBytes);
-#endif
-
-			fixed (T* dataPtr = data)
-			{
-				SDL_Gpu.SDL_GpuSetTransferData(
-					Device.Handle,
-					(nint) dataPtr,
-					Handle,
-					new SDL_Gpu.BufferCopy
-					{
-						SourceOffset = 0,
-						DestinationOffset = bufferOffsetInBytes,
-						Size = dataLengthInBytes
-					},
-					Conversions.BoolToInt(cycle)
-				);
-			}
-
-			return dataLengthInBytes;
-		}
-
-		/// <summary>
-		/// Immediately copies data from a Span to the TransferBuffer.
-		/// Returns the length of the copy in bytes.
-		///
-		/// If cycle is set to true and this TransferBuffer was used in an Upload command,
-		/// that command will still use the corret data at the cost of increased memory usage.
-		///
-		/// If cycle is set to false, the data will be overwritten immediately,
-		/// which could cause a data race.
-		/// </summary>
-		public unsafe uint SetData<T>(
-			Span<T> data,
-			bool cycle
-		) where T : unmanaged
-		{
-			return SetData(data, 0, cycle);
-		}
-
-		/// <summary>
-		/// Immediately copies data from the TransferBuffer into a Span.
-		/// </summary>
-		public unsafe void GetData<T>(
-			Span<T> data,
-			uint bufferOffsetInBytes = 0
-		) where T : unmanaged
-		{
-			var elementSize = Marshal.SizeOf<T>();
-			var dataLengthInBytes = (uint) (elementSize * data.Length);
-
-#if DEBUG
-			AssertBufferBoundsCheck(Size, bufferOffsetInBytes, dataLengthInBytes);
-#endif
-
-			fixed (T* dataPtr = data)
-			{
-				SDL_Gpu.SDL_GpuGetTransferData(
-					Device.Handle,
-					Handle,
-					(nint) dataPtr,
-					new SDL_Gpu.BufferCopy
-					{
-						SourceOffset = bufferOffsetInBytes,
-						DestinationOffset = 0,
-						Size = dataLengthInBytes
-					}
-				);
-			}
-		}
-
-#if DEBUG
-		private void AssertBufferBoundsCheck(uint bufferLengthInBytes, uint offsetInBytes, uint copyLengthInBytes)
-		{
-			if (copyLengthInBytes > bufferLengthInBytes + offsetInBytes)
-			{
-				throw new InvalidOperationException($"Data overflow! Transfer buffer length {bufferLengthInBytes}, offset {offsetInBytes}, copy length {copyLengthInBytes}");
-			}
-		}
-#endif
-	}
-}

src/Graphics/SDL_GpuTypes.cs

@@ -1,941 +0,0 @@
-using System;
-using System.Runtime.InteropServices;
-using SDL2_gpuCS;
-
-namespace MoonWorks.Graphics;
-
-// Recreate certain types in here so we can hide the SDL_GpuCS namespace
-
-public enum PrimitiveType
-{
-	PointList,
-	LineList,
-	LineStrip,
-	TriangleList,
-	TriangleStrip
-}
-
-public enum LoadOp
-{
-	Load,
-	Clear,
-	DontCare
-}
-
-public enum StoreOp
-{
-	Store,
-	DontCare
-}
-
-public enum IndexElementSize
-{
-	Sixteen,
-	ThirtyTwo
-}
-
-public enum TextureFormat
-{
-	/* Unsigned Normalized Float Color Formats */
-	R8G8B8A8,
-	B8G8R8A8,
-	R5G6B5,
-	A1R5G5B5,
-	B4G4R4A4,
-	A2R10G10B10,
-	A2B10G10R10,
-	R16G16,
-	R16G16B16A16,
-	R8,
-	A8,
-	/* Compressed Unsigned Normalized Float Color Formats */
-	BC1,
-	BC2,
-	BC3,
-	BC7,
-	/* Signed Normalized Float Color Formats  */
-	R8G8_SNORM,
-	R8G8B8A8_SNORM,
-	/* Signed Float Color Formats */
-	R16_SFLOAT,
-	R16G16_SFLOAT,
-	R16G16B16A16_SFLOAT,
-	R32_SFLOAT,
-	R32G32_SFLOAT,
-	R32G32B32A32_SFLOAT,
-	/* Unsigned Integer Color Formats */
-	R8_UINT,
-	R8G8_UINT,
-	R8G8B8A8_UINT,
-	R16_UINT,
-	R16G16_UINT,
-	R16G16B16A16_UINT,
-	/* SRGB Color Formats */
-	R8G8B8A8_SRGB,
-	B8G8R8A8_SRGB,
-	/* Compressed SRGB Color Formats */
-	BC3_SRGB,
-	BC7_SRGB,
-	/* Depth Formats */
-	D16_UNORM,
-	D24_UNORM,
-	D32_SFLOAT,
-	D24_UNORM_S8_UINT,
-	D32_SFLOAT_S8_UINT
-}
-
-[Flags]
-public enum TextureUsageFlags
-{
-	Sampler = 0x1,
-	ColorTarget = 0x2,
-	DepthStencil = 0x4,
-	GraphicsStorage = 0x8,
-	ComputeStorageRead = 0x20,
-	ComputeStorageWrite = 0x40
-}
-
-public enum TextureType
-{
-	TwoD,
-	ThreeD,
-	Cube
-}
-
-public enum SampleCount
-{
-	One,
-	Two,
-	Four,
-	Eight
-}
-
-public enum CubeMapFace
-{
-	PositiveX,
-	NegativeX,
-	PositiveY,
-	NegativeY,
-	PositiveZ,
-	NegativeZ
-}
-
-[Flags]
-public enum BufferUsageFlags
-{
-	Vertex = 0x1,
-	Index = 0x2,
-	Indirect = 0x4,
-	GraphicsStorage = 0x8,
-	ComputeStorageRead = 0x20,
-	ComputeStorageWrite = 0x40
-}
-
-[Flags]
-public enum TransferBufferMapFlags
-{
-	Read = 0x1,
-	Write = 0x2
-}
-
-public enum ShaderStage
-{
-	Vertex,
-	Fragment,
-	Compute
-}
-
-public enum ShaderFormat
-{
-	Invalid,
-	SPIRV,
-	DXBC,
-	DXIL,
-	MSL,
-	METALLIB,
-	SECRET
-}
-
-public enum VertexElementFormat
-{
-	Uint,
-	Float,
-	Vector2,
-	Vector3,
-	Vector4,
-	Color,
-	Byte4,
-	Short2,
-	Short4,
-	NormalizedShort2,
-	NormalizedShort4,
-	HalfVector2,
-	HalfVector4
-}
-
-public enum VertexInputRate
-{
-	Vertex,
-	Instance
-}
-
-public enum FillMode
-{
-	Fill,
-	Line
-}
-
-public enum CullMode
-{
-	None,
-	Front,
-	Back
-}
-
-public enum FrontFace
-{
-	CounterClockwise,
-	Clockwise
-}
-
-public enum CompareOp
-{
-	Never,
-	Less,
-	Equal,
-	LessOrEqual,
-	Greater,
-	NotEqual,
-	GreaterOrEqual,
-	Always
-}
-
-public enum StencilOp
-{
-	Keep,
-	Zero,
-	Replace,
-	IncrementAndClamp,
-	DecrementAndClamp,
-	Invert,
-	IncrementAndWrap,
-	DecrementAndWrap
-}
-
-public enum BlendOp
-{
-	Add,
-	Subtract,
-	ReverseSubtract,
-	Min,
-	Max
-}
-
-public enum BlendFactor
-{
-	Zero,
-	One,
-	SourceColor,
-	OneMinusSourceColor,
-	DestinationColor,
-	OneMinusDestinationColor,
-	SourceAlpha,
-	OneMinusSourceAlpha,
-	DestinationAlpha,
-	OneMinusDestinationAlpha,
-	ConstantColor,
-	OneMinusConstantColor,
-	SourceAlphaSaturate
-}
-
-[Flags]
-public enum ColorComponentFlags
-{
-	None = 0x0,
-	R = 0x1,
-	G = 0x2,
-	B = 0x4,
-	A = 0x8,
-	RGB = R | G | B,
-	RGBA = R | G| B | A
-}
-
-public enum Filter
-{
-	Nearest,
-	Linear
-}
-
-public enum SamplerMipmapMode
-{
-	Nearest,
-	Linear
-}
-
-public enum SamplerAddressMode
-{
-	Repeat,
-	MirroredRepeat,
-	ClampToEdge,
-	ClampToBorder
-}
-
-public enum BorderColor
-{
-	FloatTransparentBlack,
-	IntTransparentBlack,
-	FloatOpaqueBlack,
-	IntOpaqueBlack,
-	FloatOpaqueWhite,
-	IntOpaqueWhite
-}
-
-public enum TransferUsage
-{
-	Buffer,
-	Texture
-}
-
-public enum PresentMode
-{
-	VSync,
-	Immediate,
-	Mailbox
-}
-
-public enum SwapchainComposition
-{
-	SDR,
-	SDRLinear,
-	HDRExtendedLinear,
-	HDR10_ST2084
-}
-
-[Flags]
-public enum BackendFlags
-{
-	Invalid = 0x0,
-	Vulkan = 0x1,
-	D3D11 = 0x2,
-	Metal = 0x4,
-	All = Vulkan | D3D11 | Metal
-}
-
-[StructLayout(LayoutKind.Sequential)]
-public struct DepthStencilValue
-{
-	public float Depth;
-	public uint Stencil;
-
-	public DepthStencilValue(float depth, uint stencil)
-	{
-		Depth = depth;
-		Stencil = stencil;
-	}
-
-	// FIXME: can we do an unsafe cast somehow?
-	public SDL_Gpu.DepthStencilValue ToSDL()
-	{
-		return new SDL_Gpu.DepthStencilValue
-		{
-			Depth = Depth,
-			Stencil = Stencil
-		};
-	}
-}
-
-[StructLayout(LayoutKind.Sequential)]
-public struct Rect
-{
-	public int X;
-	public int Y;
-	public int W;
-	public int H;
-
-	public Rect(int x, int y, int w, int h)
-	{
-		X = x;
-		Y = y;
-		W = w;
-		H = h;
-	}
-
-	public Rect(int w, int h)
-	{
-		X = 0;
-		Y = 0;
-		W = w;
-		H = h;
-	}
-
-	// FIXME: can we do an unsafe cast somehow?
-	public SDL_Gpu.Rect ToSDL()
-	{
-		return new SDL_Gpu.Rect
-		{
-			X = X,
-			Y = Y,
-			W = W,
-			H = H
-		};
-	}
-}
-
-[StructLayout(LayoutKind.Sequential)]
-public struct Viewport
-{
-	public float X;
-	public float Y;
-	public float W;
-	public float H;
-	public float MinDepth;
-	public float MaxDepth;
-
-	public Viewport(float w, float h)
-	{
-		X = 0;
-		Y = 0;
-		W = w;
-		H = h;
-		MinDepth = 0;
-		MaxDepth = 1;
-	}
-
-	public Viewport(float x, float y, float w, float h)
-	{
-		X = x;
-		Y = y;
-		W = w;
-		H = h;
-		MinDepth = 0;
-		MaxDepth = 1;
-	}
-
-	public Viewport(float x, float y, float w, float h, float minDepth, float maxDepth)
-	{
-		X = x;
-		Y = y;
-		W = w;
-		H = h;
-		MinDepth = minDepth;
-		MaxDepth = maxDepth;
-	}
-
-	public SDL_Gpu.Viewport ToSDL()
-	{
-		return new SDL_Gpu.Viewport
-		{
-			X = X,
-			Y = Y,
-			W = W,
-			H = H,
-			MinDepth = MinDepth,
-			MaxDepth = MaxDepth
-		};
-	}
-}
-
-[StructLayout(LayoutKind.Sequential)]
-public struct VertexBinding
-{
-	public uint Binding;
-	public uint Stride;
-	public VertexInputRate InputRate;
-
-	public static VertexBinding Create<T>(uint binding = 0, VertexInputRate inputRate = VertexInputRate.Vertex) where T : unmanaged
-	{
-		return new VertexBinding
-		{
-			Binding = binding,
-			InputRate = inputRate,
-			Stride = (uint) Marshal.SizeOf<T>()
-		};
-	}
-
-	public SDL_Gpu.VertexBinding ToSDL()
-	{
-		return new SDL_Gpu.VertexBinding
-		{
-			Binding = Binding,
-			Stride = Stride,
-			InputRate = (SDL_Gpu.VertexInputRate) InputRate
-		};
-	}
-}
-
-[StructLayout(LayoutKind.Sequential)]
-public struct VertexAttribute
-{
-	public uint Location;
-	public uint Binding;
-	public VertexElementFormat Format;
-	public uint Offset;
-
-	public SDL_Gpu.VertexAttribute ToSDL()
-	{
-		return new SDL_Gpu.VertexAttribute
-		{
-			Location = Location,
-			Binding = Binding,
-			Format = (SDL_Gpu.VertexElementFormat) Format,
-			Offset = Offset
-		};
-	}
-}
-
-[StructLayout(LayoutKind.Sequential)]
-public struct StencilOpState
-{
-	public StencilOp FailOp;
-	public StencilOp PassOp;
-	public StencilOp DepthFailOp;
-	public CompareOp CompareOp;
-
-	public SDL_Gpu.StencilOpState ToSDL()
-	{
-		return new SDL_Gpu.StencilOpState
-		{
-			FailOp = (SDL_Gpu.StencilOp) FailOp,
-			PassOp = (SDL_Gpu.StencilOp) PassOp,
-			DepthFailOp = (SDL_Gpu.StencilOp) DepthFailOp,
-			CompareOp = (SDL_Gpu.CompareOp) CompareOp
-		};
-	}
-}
-
-/// <summary>
-/// Determines how a color texture will be read/written in a render pass.
-/// </summary>
-public struct ColorAttachmentInfo
-{
-	public TextureSlice TextureSlice;
-
-	/// <summary>
-	/// If LoadOp is set to Clear, the texture slice will be cleared to this color.
-	/// </summary>
-	public Color ClearColor;
-
-	/// <summary>
-	/// Determines what is done with the texture slice memory
-	/// at the beginning of the render pass. <br/>
-	///
-	///   Load:
-	///     Loads the data currently in the texture slice. <br/>
-	///
-	///   Clear:
-	///     Clears the texture slice to a single color. <br/>
-	///
-	///   DontCare:
-	///     The driver will do whatever it wants with the texture slice data.
-	///     This is a good option if you know that every single pixel will be written in the render pass.
-	/// </summary>
-	public LoadOp LoadOp;
-
-	/// <summary>
-	/// Determines what is done with the texture slice memory
-	/// at the end of the render pass. <br/>
-	///
-	///   Store:
-	///     Stores the results of the render pass in the texture slice memory. <br/>
-	///
-	///   DontCare:
-	///     The driver will do whatever it wants with the texture slice memory.
-	/// </summary>
-	public StoreOp StoreOp;
-
-	/// <summary>
-	/// If true, cycles the texture if it is bound.
-	/// </summary>
-	public bool Cycle;
-
-	public ColorAttachmentInfo(
-		TextureSlice textureSlice,
-		bool cycle,
-		Color clearColor,
-		StoreOp storeOp = StoreOp.Store
-	) {
-		TextureSlice = textureSlice;
-		ClearColor = clearColor;
-		LoadOp = LoadOp.Clear;
-		StoreOp = storeOp;
-		Cycle = cycle;
-	}
-
-	public ColorAttachmentInfo(
-		TextureSlice textureSlice,
-		bool cycle,
-		LoadOp loadOp = LoadOp.DontCare,
-		StoreOp storeOp = StoreOp.Store
-	) {
-		TextureSlice = textureSlice;
-		ClearColor = Color.White;
-		LoadOp = loadOp;
-		StoreOp = storeOp;
-		Cycle = cycle;
-	}
-
-	public SDL_Gpu.ColorAttachmentInfo ToSDL()
-	{
-		return new SDL_Gpu.ColorAttachmentInfo
-		{
-			TextureSlice = TextureSlice.ToSDL(),
-			ClearColor = new SDL_Gpu.Color
-			{
-				R = ClearColor.R / 255f,
-				G = ClearColor.G / 255f,
-				B = ClearColor.B / 255f,
-				A = ClearColor.A / 255f
-			},
-			LoadOp = (SDL_Gpu.LoadOp) LoadOp,
-			StoreOp = (SDL_Gpu.StoreOp) StoreOp,
-			Cycle = Conversions.BoolToInt(Cycle)
-		};
-	}
-}
-
-/// <summary>
-/// Determines how a depth/stencil texture will be read/written in a render pass.
-/// </summary>
-public struct DepthStencilAttachmentInfo
-{
-	public TextureSlice TextureSlice;
-
-	/// <summary>
-	/// If LoadOp is set to Clear, the texture slice depth will be cleared to this depth value. <br/>
-	/// If StencilLoadOp is set to Clear, the texture slice stencil value will be cleared to this stencil value.
-	/// </summary>
-	public DepthStencilValue DepthStencilClearValue;
-
-	/// <summary>
-	/// Determines what is done with the texture slice depth values
-	/// at the beginning of the render pass. <br/>
-	///
-	///   Load:
-	///     Loads the data currently in the texture slice. <br/>
-	///
-	///   Clear:
-	///     Clears the texture slice to a single depth value. <br/>
-	///
-	///   DontCare:
-	///     The driver will do whatever it wants with the texture slice data.
-	///     This is a good option if you know that every single pixel will be written in the render pass.
-	/// </summary>
-	public LoadOp LoadOp;
-
-	/// <summary>
-	/// Determines what is done with the texture slice depth values
-	/// at the end of the render pass. <br/>
-	///
-	///   Store:
-	///     Stores the results of the render pass in the texture slice memory. <br/>
-	///
-	///   DontCare:
-	///     The driver will do whatever it wants with the texture slice memory.
-	///     This is usually a good option for depth textures that don't need to be reused.
-	/// </summary>
-	public StoreOp StoreOp;
-
-	/// <summary>
-	/// Determines what is done with the texture slice stencil values
-	/// at the beginning of the render pass. <br/>
-	///
-	///   Load:
-	///     Loads the data currently in the texture slice. <br/>
-	///
-	///   Clear:
-	///     Clears the texture slice to a single stencil value. <br/>
-	///
-	///   DontCare:
-	///     The driver will do whatever it wants with the texture slice data.
-	///     This is a good option if you know that every single pixel will be written in the render pass.
-	/// </summary>
-	public LoadOp StencilLoadOp;
-
-	/// <summary>
-	/// Determines what is done with the texture slice stencil values
-	/// at the end of the render pass. <br/>
-	///
-	///   Store:
-	///     Stores the results of the render pass in the texture slice memory. <br/>
-	///
-	///   DontCare:
-	///     The driver will do whatever it wants with the texture slice memory.
-	///     This is usually a good option for stencil textures that don't need to be reused.
-	/// </summary>
-	public StoreOp StencilStoreOp;
-
-	/// <summary>
-	/// If true, cycles the texture if it is bound.
-	/// </summary>
-	public bool Cycle;
-
-	public DepthStencilAttachmentInfo(
-		TextureSlice textureSlice,
-		bool cycle,
-		DepthStencilValue clearValue,
-		StoreOp depthStoreOp = StoreOp.DontCare,
-		StoreOp stencilStoreOp = StoreOp.DontCare
-	){
-		TextureSlice = textureSlice;
-		DepthStencilClearValue = clearValue;
-		LoadOp = LoadOp.Clear;
-		StoreOp = depthStoreOp;
-		StencilLoadOp = LoadOp.Clear;
-		StencilStoreOp = stencilStoreOp;
-		Cycle = cycle;
-	}
-
-	public DepthStencilAttachmentInfo(
-		TextureSlice textureSlice,
-		bool cycle,
-		LoadOp loadOp = LoadOp.DontCare,
-		StoreOp storeOp = StoreOp.DontCare,
-		LoadOp stencilLoadOp = LoadOp.DontCare,
-		StoreOp stencilStoreOp = StoreOp.DontCare
-	) {
-		TextureSlice = textureSlice;
-		DepthStencilClearValue = new DepthStencilValue();
-		LoadOp = loadOp;
-		StoreOp = storeOp;
-		StencilLoadOp = stencilLoadOp;
-		StencilStoreOp = stencilStoreOp;
-		Cycle = cycle;
-	}
-
-	public DepthStencilAttachmentInfo(
-		TextureSlice textureSlice,
-		bool cycle,
-		DepthStencilValue clearValue,
-		LoadOp loadOp,
-		StoreOp storeOp,
-		LoadOp stencilLoadOp,
-		StoreOp stencilStoreOp
-	) {
-		TextureSlice = textureSlice;
-		DepthStencilClearValue = clearValue;
-		LoadOp = loadOp;
-		StoreOp = storeOp;
-		StencilLoadOp = stencilLoadOp;
-		StencilStoreOp = stencilStoreOp;
-		Cycle = cycle;
-	}
-
-	public SDL_Gpu.DepthStencilAttachmentInfo ToSDL()
-	{
-		return new SDL_Gpu.DepthStencilAttachmentInfo
-		{
-			TextureSlice = TextureSlice.ToSDL(),
-			DepthStencilClearValue = DepthStencilClearValue.ToSDL(),
-			LoadOp = (SDL_Gpu.LoadOp) LoadOp,
-			StoreOp = (SDL_Gpu.StoreOp) StoreOp,
-			StencilLoadOp = (SDL_Gpu.LoadOp) StencilLoadOp,
-			StencilStoreOp = (SDL_Gpu.StoreOp) StencilStoreOp,
-			Cycle = Conversions.BoolToInt(Cycle)
-		};
-	}
-}
-
-[StructLayout(LayoutKind.Sequential)]
-public struct ColorAttachmentDescription
-{
-	public TextureFormat Format;
-	public ColorAttachmentBlendState BlendState;
-
-	public ColorAttachmentDescription(
-		TextureFormat format,
-		ColorAttachmentBlendState blendState
-	) {
-		Format = format;
-		BlendState = blendState;
-	}
-}
-
-[StructLayout(LayoutKind.Sequential)]
-public struct IndirectDrawCommand
-{
-	public uint VertexCount;
-	public uint InstanceCount;
-	public uint FirstVertex;
-	public uint FirstInstance;
-
-	public IndirectDrawCommand(
-		uint vertexCount,
-		uint instanceCount,
-		uint firstVertex,
-		uint firstInstance
-	) {
-		VertexCount = vertexCount;
-		InstanceCount = instanceCount;
-		FirstVertex = firstVertex;
-		FirstInstance = firstInstance;
-	}
-}
-
-[StructLayout(LayoutKind.Sequential)]
-public struct BufferCopy
-{
-	public uint SrcOffset;
-	public uint DstOffset;
-	public uint Size;
-
-	public BufferCopy(
-		uint srcOffset,
-		uint dstOffset,
-		uint size
-	) {
-		SrcOffset = srcOffset;
-		DstOffset = dstOffset;
-		Size = size;
-	}
-
-	public SDL_Gpu.BufferCopy ToSDL()
-	{
-		return new SDL_Gpu.BufferCopy
-		{
-			SourceOffset = SrcOffset,
-			DestinationOffset = DstOffset,
-			Size = Size
-		};
-	}
-}
-
-/// <summary>
-/// Parameters for a copy between buffer and image.
-/// </summary>
-/// <param name="BufferOffset">The offset into the buffer.</param>
-/// <param name="BufferStride">If 0, image data is assumed tightly packed.</param>
-/// <param name="BufferImageHeight">If 0, image data is assumed tightly packed.</param>
-[StructLayout(LayoutKind.Sequential)]
-public readonly record struct BufferImageCopy(
-	uint BufferOffset,
-	uint BufferStride,
-	uint BufferImageHeight
-) {
-	public SDL_Gpu.BufferImageCopy ToSDL()
-	{
-		return new SDL_Gpu.BufferImageCopy
-		{
-			BufferOffset = BufferOffset,
-			BufferStride = BufferStride,
-			BufferImageHeight = BufferImageHeight
-		};
-	}
-}
-
-public readonly record struct GraphicsPipelineResourceInfo(
-	uint SamplerCount,
-	uint StorageBufferCount,
-	uint StorageTextureCount,
-	uint UniformBufferCount
-) {
-	public SDL_Gpu.GraphicsPipelineResourceInfo ToSDL()
-	{
-		return new SDL_Gpu.GraphicsPipelineResourceInfo
-		{
-			SamplerCount = SamplerCount,
-			StorageBufferCount = StorageBufferCount,
-			StorageTextureCount = StorageTextureCount,
-			UniformBufferCount = UniformBufferCount
-		};
-	}
-}
-
-public readonly record struct ComputePipelineResourceInfo(
-	uint ReadOnlyStorageTextureCount,
-	uint ReadOnlyStorageBufferCount,
-	uint ReadWriteStorageTextureCount,
-	uint ReadWriteStorageBufferCount,
-	uint UniformBufferCount
-) {
-	public SDL_Gpu.ComputePipelineResourceInfo ToSDL()
-	{
-		return new SDL_Gpu.ComputePipelineResourceInfo
-		{
-			ReadOnlyStorageTextureCount = ReadOnlyStorageTextureCount,
-			ReadOnlyStorageBufferCount = ReadOnlyStorageBufferCount,
-			ReadWriteStorageTextureCount = ReadWriteStorageTextureCount,
-			ReadWriteStorageBufferCount = ReadWriteStorageBufferCount,
-			UniformBufferCount = UniformBufferCount
-		};
-	}
-}
-
-/// <summary>
-/// A buffer-offset pair to be used when binding buffers.
-/// </summary>
-public readonly record struct BufferBinding(
-	GpuBuffer Buffer,
-	uint Offset
-) {
-	public SDL_Gpu.BufferBinding ToSDL()
-	{
-		return new SDL_Gpu.BufferBinding
-		{
-			Buffer = Buffer.Handle,
-			Offset = Offset
-		};
-	}
-}
-
-/// <summary>
-/// A texture-sampler pair to be used when binding samplers.
-/// </summary>
-public readonly record struct TextureSamplerBinding(
-	Texture Texture,
-	Sampler Sampler
-) {
-	public SDL_Gpu.TextureSamplerBinding ToSDL()
-	{
-		return new SDL_Gpu.TextureSamplerBinding
-		{
-			Texture = Texture.Handle,
-			Sampler = Sampler.Handle
-		};
-	}
-}
-
-public readonly record struct StorageBufferReadWriteBinding(
-	GpuBuffer Buffer,
-	bool cycle
-) {
-	public SDL_Gpu.StorageBufferReadWriteBinding ToSDL()
-	{
-		return new SDL_Gpu.StorageBufferReadWriteBinding
-		{
-			Buffer = Buffer.Handle,
-			Cycle = Conversions.BoolToInt(cycle)
-		};
-	}
-}
-
-public readonly record struct StorageTextureReadWriteBinding(
-	in TextureSlice TextureSlice,
-	bool cycle
-) {
-	public SDL_Gpu.StorageTextureReadWriteBinding ToSDL()
-	{
-		return new SDL_Gpu.StorageTextureReadWriteBinding
-		{
-			TextureSlice = TextureSlice.ToSDL(),
-			Cycle = Conversions.BoolToInt(cycle)
-		};
-	}
-}
-
-/// <summary>
-/// All of the information that is used to create a GraphicsPipeline.
-/// </summary>
-public struct GraphicsPipelineCreateInfo
-{
-	public Shader VertexShader;
-	public Shader FragmentShader;
-	public VertexInputState VertexInputState;
-	public PrimitiveType PrimitiveType;
-	public RasterizerState RasterizerState;
-	public MultisampleState MultisampleState;
-	public DepthStencilState DepthStencilState;
-	public GraphicsPipelineAttachmentInfo AttachmentInfo;
-	public GraphicsPipelineResourceInfo VertexShaderResourceInfo;
-	public GraphicsPipelineResourceInfo FragmentShaderResourceInfo;
-	public BlendConstants BlendConstants;
-}

src/Graphics/State/ColorAttachmentBlendState.cs

@@ -1,4 +1,4 @@
-using SDL2_gpuCS;
+using RefreshCS;
 
 namespace MoonWorks.Graphics
 {
@@ -106,18 +106,18 @@ namespace MoonWorks.Graphics
 			ColorWriteMask = ColorComponentFlags.None
 		};
 
-		public SDL_Gpu.ColorAttachmentBlendState ToSDL()
+		public Refresh.ColorAttachmentBlendState ToRefresh()
 		{
-			return new SDL_Gpu.ColorAttachmentBlendState
+			return new Refresh.ColorAttachmentBlendState
 			{
-				BlendEnable = Conversions.BoolToInt(BlendEnable),
+				blendEnable = Conversions.BoolToByte(BlendEnable),
-				AlphaBlendOp = (SDL_Gpu.BlendOp) AlphaBlendOp,
+				alphaBlendOp = (Refresh.BlendOp) AlphaBlendOp,
-				ColorBlendOp = (SDL_Gpu.BlendOp) ColorBlendOp,
+				colorBlendOp = (Refresh.BlendOp) ColorBlendOp,
-				ColorWriteMask = (SDL_Gpu.ColorComponentFlags) ColorWriteMask,
+				colorWriteMask = (Refresh.ColorComponentFlags) ColorWriteMask,
-				DestinationAlphaBlendFactor = (SDL_Gpu.BlendFactor) DestinationAlphaBlendFactor,
+				destinationAlphaBlendFactor = (Refresh.BlendFactor) DestinationAlphaBlendFactor,
-				DestinationColorBlendFactor = (SDL_Gpu.BlendFactor) DestinationColorBlendFactor,
+				destinationColorBlendFactor = (Refresh.BlendFactor) DestinationColorBlendFactor,
-				SourceAlphaBlendFactor = (SDL_Gpu.BlendFactor) SourceAlphaBlendFactor,
+				sourceAlphaBlendFactor = (Refresh.BlendFactor) SourceAlphaBlendFactor,
-				SourceColorBlendFactor = (SDL_Gpu.BlendFactor) SourceColorBlendFactor
+				sourceColorBlendFactor = (Refresh.BlendFactor) SourceColorBlendFactor
 			};
 		}
 	}

src/Graphics/State/ComputeShaderInfo.cs

@@ -0,0 +1,50 @@
+using System.Runtime.InteropServices;
+
+namespace MoonWorks.Graphics
+{
+	/// <summary>
+	/// Information that the compute pipeline needs about a compute shader.
+	/// </summary>
+	public struct ComputeShaderInfo
+	{
+		public ShaderModule ShaderModule;
+		public string EntryPointName;
+		public uint UniformBufferSize;
+		public uint BufferBindingCount;
+		public uint ImageBindingCount;
+
+		public unsafe static ComputeShaderInfo Create<T>(
+			ShaderModule shaderModule,
+			string entryPointName,
+			uint bufferBindingCount,
+			uint imageBindingCount
+		) where T : unmanaged
+		{
+			return new ComputeShaderInfo
+			{
+				ShaderModule = shaderModule,
+				EntryPointName = entryPointName,
+				UniformBufferSize = (uint) Marshal.SizeOf<T>(),
+				BufferBindingCount = bufferBindingCount,
+				ImageBindingCount = imageBindingCount
+			};
+		}
+
+        public static ComputeShaderInfo Create(
+            ShaderModule shaderModule,
+            string entryPointName,
+            uint bufferBindingCount,
+            uint imageBindingCount
+        )
+        {
+            return new ComputeShaderInfo
+			{
+				ShaderModule = shaderModule,
+				EntryPointName = entryPointName,
+				UniformBufferSize = 0,
+				BufferBindingCount = bufferBindingCount,
+				ImageBindingCount = imageBindingCount
+			};
+        }
+	}
+}

src/Graphics/State/DepthStencilState.cs

@@ -1,6 +1,4 @@
-using SDL2_gpuCS;
+namespace MoonWorks.Graphics
-
-namespace MoonWorks.Graphics
 {
 	/// <summary>
 	/// Determines how data is written to and read from the depth/stencil buffer.
@@ -13,30 +11,15 @@ namespace MoonWorks.Graphics
 		public bool DepthTestEnable;
 
 		/// <summary>
-		/// Describes the back-face stencil operation.
+		/// Describes the stencil operation for back-facing primitives.
 		/// </summary>
 		public StencilOpState BackStencilState;
 
 		/// <summary>
-		/// Describes the front-face stencil operation.
+		/// Describes the stencil operation for front-facing primitives.
 		/// </summary>
 		public StencilOpState FrontStencilState;
 
-		/// <summary>
-		/// The compare mask for stencil ops.
-		/// </summary>
-		public uint CompareMask;
-
-		/// <summary>
-		/// The write mask for stencil ops.
-		/// </summary>
-		public uint WriteMask;
-
-		/// <summary>
-		/// The stencil reference value.
-		/// </summary>
-		public uint Reference;
-
 		/// <summary>
 		/// The comparison operator used in the depth test.
 		/// </summary>
@@ -92,24 +75,5 @@ namespace MoonWorks.Graphics
 			DepthBoundsTestEnable = false,
 			StencilTestEnable = false
 		};
-
-		public SDL_Gpu.DepthStencilState ToSDL()
-		{
-			return new SDL_Gpu.DepthStencilState
-			{
-				DepthTestEnable = Conversions.BoolToInt(DepthTestEnable),
-				BackStencilState = BackStencilState.ToSDL(),
-				FrontStencilState = FrontStencilState.ToSDL(),
-				CompareMask = CompareMask,
-				WriteMask = WriteMask,
-				Reference = Reference,
-				CompareOp = (SDL_Gpu.CompareOp) CompareOp,
-				DepthBoundsTestEnable = Conversions.BoolToInt(DepthBoundsTestEnable),
-				DepthWriteEnable = Conversions.BoolToInt(DepthWriteEnable),
-				MinDepthBounds = MinDepthBounds,
-				MaxDepthBounds = MaxDepthBounds,
-				StencilTestEnable = Conversions.BoolToInt(StencilTestEnable)
-			};
-		}
 	}
 }

src/Graphics/State/GraphicsPipelineAttachmentInfo.cs

@@ -14,7 +14,7 @@ namespace MoonWorks.Graphics
 		) {
 			ColorAttachmentDescriptions = colorAttachmentDescriptions;
 			HasDepthStencilAttachment = false;
-			DepthStencilFormat = TextureFormat.D16_UNORM;
+			DepthStencilFormat = TextureFormat.D16;
 		}
 
 		public GraphicsPipelineAttachmentInfo(

src/Graphics/State/GraphicsPipelineCreateInfo.cs

@@ -0,0 +1,18 @@
+namespace MoonWorks.Graphics
+{
+	/// <summary>
+	/// All of the information that is used to create a GraphicsPipeline.
+	/// </summary>
+	public struct GraphicsPipelineCreateInfo
+	{
+		public DepthStencilState DepthStencilState;
+		public GraphicsShaderInfo VertexShaderInfo;
+		public GraphicsShaderInfo FragmentShaderInfo;
+		public MultisampleState MultisampleState;
+		public RasterizerState RasterizerState;
+		public PrimitiveType PrimitiveType;
+		public VertexInputState VertexInputState;
+		public GraphicsPipelineAttachmentInfo AttachmentInfo;
+		public BlendConstants BlendConstants;
+	}
+}

src/Graphics/State/GraphicsShaderInfo.cs

@@ -0,0 +1,44 @@
+using System.Runtime.InteropServices;
+
+namespace MoonWorks.Graphics
+{
+	/// <summary>
+	/// Information that the pipeline needs about a graphics shader.
+	/// </summary>
+	public struct GraphicsShaderInfo
+	{
+		public ShaderModule ShaderModule;
+		public string EntryPointName;
+		public uint UniformBufferSize;
+		public uint SamplerBindingCount;
+
+		public unsafe static GraphicsShaderInfo Create<T>(
+			ShaderModule shaderModule,
+			string entryPointName,
+			uint samplerBindingCount
+		) where T : unmanaged
+		{
+			return new GraphicsShaderInfo
+			{
+				ShaderModule = shaderModule,
+				EntryPointName = entryPointName,
+				UniformBufferSize = (uint) Marshal.SizeOf<T>(),
+				SamplerBindingCount = samplerBindingCount
+			};
+		}
+
+		public static GraphicsShaderInfo Create(
+			ShaderModule shaderModule,
+			string entryPointName,
+			uint samplerBindingCount
+		) {
+			return new GraphicsShaderInfo
+			{
+				ShaderModule = shaderModule,
+				EntryPointName = entryPointName,
+				UniformBufferSize = 0,
+				SamplerBindingCount = samplerBindingCount
+			};
+		}
+	}
+}

src/Graphics/State/MultisampleState.cs

@@ -1,6 +1,4 @@
-using SDL2_gpuCS;
+namespace MoonWorks.Graphics
-
-namespace MoonWorks.Graphics
 {
 	/// <summary>
 	/// Specifies how many samples should be used in rasterization.
@@ -23,14 +21,5 @@ namespace MoonWorks.Graphics
 			MultisampleCount = sampleCount;
 			SampleMask = sampleMask;
 		}
-
-		public SDL_Gpu.MultisampleState ToSDL()
-		{
-			return new SDL_Gpu.MultisampleState
-			{
-				MultisampleCount = (SDL_Gpu.SampleCount) MultisampleCount,
-				SampleMask = SampleMask
-			};
-		}
 	}
 }

src/Graphics/State/RasterizerState.cs

@@ -1,12 +1,10 @@
-using SDL2_gpuCS;
+namespace MoonWorks.Graphics
-
-namespace MoonWorks.Graphics;
-
-/// <summary>
-/// Specifies how the rasterizer should be configured for a graphics pipeline.
-/// </summary>
-public struct RasterizerState
 {
+	/// <summary>
+	/// Specifies how the rasterizer should be configured for a graphics pipeline.
+	/// </summary>
+	public struct RasterizerState
+	{
 		/// <summary>
 		/// Specifies whether front faces, back faces, none, or both should be culled.
 		/// </summary>
@@ -105,18 +103,5 @@ public struct RasterizerState
 			FillMode = FillMode.Line,
 			DepthBiasEnable = false
 		};
-
-	public SDL_Gpu.RasterizerState ToSDL()
-	{
-		return new SDL_Gpu.RasterizerState
-		{
-			CullMode = (SDL_Gpu.CullMode) CullMode,
-			DepthBiasClamp = DepthBiasClamp,
-			DepthBiasConstantFactor = DepthBiasConstantFactor,
-			DepthBiasEnable = Conversions.BoolToInt(DepthBiasEnable),
-			DepthBiasSlopeFactor = DepthBiasSlopeFactor,
-			FillMode = (SDL_Gpu.FillMode) FillMode,
-			FrontFace = (SDL_Gpu.FrontFace) FrontFace
-		};
 	}
 }

src/Graphics/State/SamplerCreateInfo.cs

@@ -1,12 +1,12 @@
-using SDL2_gpuCS;
+using RefreshCS;
 
-namespace MoonWorks.Graphics;
+namespace MoonWorks.Graphics
-
-/// <summary>
-/// All of the information that is used to create a sampler.
-/// </summary>
-public struct SamplerCreateInfo
 {
+	/// <summary>
+	/// All of the information that is used to create a sampler.
+	/// </summary>
+	public struct SamplerCreateInfo
+	{
 		/// <summary>
 		/// Minification filter mode. Used when the image is downscaled.
 		/// </summary>
@@ -150,24 +150,25 @@ public struct SamplerCreateInfo
 			MaxLod = 1000
 		};
 
-	public SDL_Gpu.SamplerCreateInfo ToSDL()
+		public Refresh.SamplerStateCreateInfo ToRefreshSamplerStateCreateInfo()
 		{
-		return new SDL_Gpu.SamplerCreateInfo
+			return new Refresh.SamplerStateCreateInfo
 			{
-			MinFilter = (SDL_Gpu.Filter) MinFilter,
+				minFilter = (Refresh.Filter) MinFilter,
-			MagFilter = (SDL_Gpu.Filter) MagFilter,
+				magFilter = (Refresh.Filter) MagFilter,
-			MipmapMode = (SDL_Gpu.SamplerMipmapMode) MipmapMode,
+				mipmapMode = (Refresh.SamplerMipmapMode) MipmapMode,
-			AddressModeU = (SDL_Gpu.SamplerAddressMode) AddressModeU,
+				addressModeU = (Refresh.SamplerAddressMode) AddressModeU,
-			AddressModeV = (SDL_Gpu.SamplerAddressMode) AddressModeV,
+				addressModeV = (Refresh.SamplerAddressMode) AddressModeV,
-			AddressModeW = (SDL_Gpu.SamplerAddressMode) AddressModeW,
+				addressModeW = (Refresh.SamplerAddressMode) AddressModeW,
-			MipLodBias = MipLodBias,
+				mipLodBias = MipLodBias,
-			AnisotropyEnable = Conversions.BoolToByte(AnisotropyEnable),
+				anisotropyEnable = Conversions.BoolToByte(AnisotropyEnable),
-			MaxAnisotropy = MaxAnisotropy,
+				maxAnisotropy = MaxAnisotropy,
-			CompareEnable = Conversions.BoolToByte(CompareEnable),
+				compareEnable = Conversions.BoolToByte(CompareEnable),
-			CompareOp = (SDL_Gpu.CompareOp) CompareOp,
+				compareOp = (Refresh.CompareOp) CompareOp,
-			MinLod = MinLod,
+				minLod = MinLod,
-			MaxLod = MaxLod,
+				maxLod = MaxLod,
-			BorderColor = (SDL_Gpu.BorderColor) BorderColor
+				borderColor = (Refresh.BorderColor) BorderColor
 			};
 		}
+	}
 }

src/Graphics/State/TextureCreateInfo.cs

@@ -1,4 +1,4 @@
-using SDL2_gpuCS;
+using RefreshCS;
 
 namespace MoonWorks.Graphics
 {
@@ -11,25 +11,23 @@ namespace MoonWorks.Graphics
 		public uint Height;
 		public uint Depth;
 		public bool IsCube;
-		public uint LayerCount;
 		public uint LevelCount;
 		public SampleCount SampleCount;
 		public TextureFormat Format;
 		public TextureUsageFlags UsageFlags;
 
-		public SDL_Gpu.TextureCreateInfo ToSDL()
+		public Refresh.TextureCreateInfo ToRefreshTextureCreateInfo()
 		{
-			return new SDL_Gpu.TextureCreateInfo
+			return new Refresh.TextureCreateInfo
 			{
-				Width = Width,
+				width = Width,
-				Height = Height,
+				height = Height,
-				Depth = Depth,
+				depth = Depth,
-				IsCube = Conversions.BoolToInt(IsCube),
+				isCube = Conversions.BoolToByte(IsCube),
-				LayerCount = LayerCount,
+				levelCount = LevelCount,
-				LevelCount = LevelCount,
+				sampleCount = (Refresh.SampleCount) SampleCount,
-				SampleCount = (SDL_Gpu.SampleCount) SampleCount,
+				format = (Refresh.TextureFormat) Format,
-				Format = (SDL_Gpu.TextureFormat) Format,
+				usageFlags = (Refresh.TextureUsageFlags) UsageFlags
-				UsageFlags = (SDL_Gpu.TextureUsageFlags) UsageFlags
 			};
 		}
 	}

src/Graphics/StockShaders/Source/blit.frag

@@ -1,12 +0,0 @@
-#version 450
-
-layout (location = 0) in vec2 TexCoord;
-
-layout (location = 0) out vec4 FragColor;
-
-layout (binding = 0, set = 1) uniform sampler2D TexSampler;
-
-void main()
-{
-	FragColor = texture(TexSampler, TexCoord);
-}

src/Graphics/TextureRegion.cs

@@ -1,46 +0,0 @@
-using SDL2_gpuCS;
-
-namespace MoonWorks.Graphics
-{
-	/// <summary>
-	/// A texture region specifies a subregion of a texture.
-	/// These are used by copy commands.
-	/// </summary>
-	public struct TextureRegion
-	{
-		public TextureSlice TextureSlice;
-		public uint X;
-		public uint Y;
-		public uint Z;
-		public uint Width;
-		public uint Height;
-		public uint Depth;
-
-		public uint Size => (Width * Height * Depth * Texture.BytesPerPixel(TextureSlice.Texture.Format) / Texture.BlockSizeSquared(TextureSlice.Texture.Format)) >> (int) TextureSlice.MipLevel;
-
-		public TextureRegion(Texture texture)
-		{
-			TextureSlice = new TextureSlice(texture);
-			X = 0;
-			Y = 0;
-			Z = 0;
-			Width = texture.Width;
-			Height = texture.Height;
-			Depth = texture.Depth;
-		}
-
-		public SDL_Gpu.TextureRegion ToSDL()
-		{
-			return new SDL_Gpu.TextureRegion
-			{
-				TextureSlice = TextureSlice.ToSDL(),
-				X = X,
-				Y = Y,
-				Z = Z,
-				W = Width,
-				H = Height,
-				D = Depth
-			};
-		}
-	}
-}

src/Graphics/TextureSlice.cs

@@ -1,31 +1,57 @@
-using SDL2_gpuCS;
+using RefreshCS;
-namespace MoonWorks.Graphics;
 
-/// <summary>
+namespace MoonWorks.Graphics
-/// A texture slice specifies a subresource of a texture.
-/// </summary>
-public struct TextureSlice
 {
-	public Texture Texture;
+	/// <summary>
-	public uint MipLevel;
+	/// A texture slice specifies a subregion of a texture.
-	public uint Layer;
+	/// Many operations can use texture slices in place of textures for the sake of convenience.
+	/// </summary>
+	public struct TextureSlice
+	{
+		public Texture Texture { get; }
+		public Rect Rectangle { get; }
+		public uint Depth { get; }
+		public uint Layer { get; }
+		public uint Level { get; }
 
-	public uint Size => (Texture.Width * Texture.Height * Texture.Depth * Texture.BytesPerPixel(Texture.Format) / Texture.BlockSizeSquared(Texture.Format)) >> (int) MipLevel;
+		public uint Size => (uint) (Rectangle.W * Rectangle.H * Texture.BytesPerPixel(Texture.Format) / Texture.BlockSizeSquared(Texture.Format));
 
 		public TextureSlice(Texture texture)
 		{
 			Texture = texture;
-		MipLevel = 0;
+			Rectangle = new Rect
+			{
+				X = 0,
+				Y = 0,
+				W = (int) texture.Width,
+				H = (int) texture.Height
+			};
+			Depth = 0;
 			Layer = 0;
+			Level = 0;
 		}
 
-	public SDL_Gpu.TextureSlice ToSDL()
+		public TextureSlice(Texture texture, Rect rectangle, uint depth = 0, uint layer = 0, uint level = 0)
 		{
-		return new SDL_Gpu.TextureSlice
+			Texture = texture;
+			Rectangle = rectangle;
+			Depth = depth;
+			Layer = layer;
+			Level = level;
+		}
+
+		public Refresh.TextureSlice ToRefreshTextureSlice()
 		{
-			Texture = Texture.Handle,
+			Refresh.TextureSlice textureSlice = new Refresh.TextureSlice
-			MipLevel = MipLevel,
+			{
-			Layer = Layer
+				texture = Texture.Handle,
+				rectangle = Rectangle.ToRefresh(),
+				depth = Depth,
+				layer = Layer,
+				level = Level
 			};
+
+			return textureSlice;
+		}
 	}
 }

src/Logger.cs

@@ -1,4 +1,5 @@
 using System;
+using RefreshCS;
 
 namespace MoonWorks
 {
@@ -8,6 +9,19 @@ namespace MoonWorks
 		public static Action<string> LogWarn = LogWarnDefault;
 		public static Action<string> LogError = LogErrorDefault;
 
+		private static RefreshCS.Refresh.Refresh_LogFunc LogInfoFunc = RefreshLogInfo;
+		private static RefreshCS.Refresh.Refresh_LogFunc LogWarnFunc = RefreshLogWarn;
+		private static RefreshCS.Refresh.Refresh_LogFunc LogErrorFunc = RefreshLogError;
+
+		internal static void Initialize()
+		{
+			Refresh.Refresh_HookLogFunctions(
+				LogInfoFunc,
+				LogWarnFunc,
+				LogErrorFunc
+			);
+		}
+
 		private static void LogInfoDefault(string str)
 		{
 			Console.ForegroundColor = ConsoleColor.Green;

src/Video/VideoAV1.cs

@@ -11,6 +11,10 @@ namespace MoonWorks.Video
 	{
 		public string Filename { get; }
 
+		// "double buffering" so we can loop without a stutter
+		internal VideoAV1Stream StreamA { get; }
+		internal VideoAV1Stream StreamB { get; }
+
 		public int Width => width;
 		public int Height => height;
 		public double FramesPerSecond { get; set; }
@@ -63,6 +67,23 @@ namespace MoonWorks.Video
 			FramesPerSecond = framesPerSecond;
 
 			Filename = filename;
+
+			StreamA = new VideoAV1Stream(device, this);
+			StreamB = new VideoAV1Stream(device, this);
+		}
+
+		// NOTE: if you call this while a VideoPlayer is playing the stream, your program will explode
+		protected override void Dispose(bool disposing)
+		{
+			if (!IsDisposed)
+			{
+				if (disposing)
+				{
+					StreamA.Dispose();
+					StreamB.Dispose();
+				}
+			}
+			base.Dispose(disposing);
 		}
 	}
 }

src/Video/VideoAV1Stream.cs

@@ -1,17 +1,13 @@
 using System;
-using System.Collections.Concurrent;
-using System.Threading;
 using MoonWorks.Graphics;
 
 namespace MoonWorks.Video
 {
-	// Note that all public methods are async.
 	internal class VideoAV1Stream : GraphicsResource
 	{
 		public IntPtr Handle => handle;
 		IntPtr handle;
 
-		public bool Loaded => handle != IntPtr.Zero;
 		public bool Ended => Dav1dfile.df_eos(Handle) == 1;
 
 		public IntPtr yDataHandle;
@@ -24,89 +20,33 @@ namespace MoonWorks.Video
 
 		public bool FrameDataUpdated { get; set; }
 
-		private BlockingCollection<Action> Actions = new BlockingCollection<Action>();
+		public VideoAV1Stream(GraphicsDevice device, VideoAV1 video) : base(device)
-
-		private bool Running = false;
-
-		Thread Thread;
-
-		public VideoAV1Stream(GraphicsDevice device) : base(device)
 		{
-			handle = IntPtr.Zero;
+			if (Dav1dfile.df_fopen(video.Filename, out handle) == 0)
-
-			Running = true;
-
-			Thread = new Thread(ThreadMain);
-			Thread.Start();
-		}
-
-		private void ThreadMain()
 			{
-			while (Running)
+				throw new Exception("Failed to open video file!");
-			{
-				// block until we can take an action, then run it
-				var action = Actions.Take();
-				action.Invoke();
-			}
-
-			// shutting down...
-			while (Actions.TryTake(out var action))
-			{
-				action.Invoke();
-			}
-		}
-
-		public void Load(string filename)
-		{
-			Actions.Add(() => LoadHelper(filename));
-		}
-
-		public void Reset()
-		{
-			Actions.Add(ResetHelper);
-		}
-
-		public void ReadNextFrame()
-		{
-			Actions.Add(ReadNextFrameHelper);
-		}
-
-		public void Unload()
-		{
-			Actions.Add(UnloadHelper);
-		}
-
-		private void LoadHelper(string filename)
-		{
-			if (!Loaded)
-			{
-				if (Dav1dfile.df_fopen(filename, out handle) == 0)
-				{
-					Logger.LogError("Failed to load video file: " + filename);
-					throw new Exception("Failed to load video file!");
 			}
 
 			Reset();
 		}
-		}
 
-		private void ResetHelper()
+		public void Reset()
 		{
-			if (Loaded)
+			lock (this)
 			{
-				Dav1dfile.df_reset(handle);
+				Dav1dfile.df_reset(Handle);
 				ReadNextFrame();
 			}
 		}
 
-		private void ReadNextFrameHelper()
+		public void ReadNextFrame()
-		{
-			if (Loaded && !Ended)
 		{
 			lock (this)
+			{
+				if (!Ended)
 				{
 					if (Dav1dfile.df_readvideo(
-						handle,
+						Handle,
 						1,
 						out var yDataHandle,
 						out var uDataHandle,
@@ -130,26 +70,11 @@ namespace MoonWorks.Video
 			}
 		}
 
-		private void UnloadHelper()
-		{
-			if (Loaded)
-			{
-				Dav1dfile.df_close(handle);
-				handle = IntPtr.Zero;
-			}
-		}
-
 		protected override void Dispose(bool disposing)
 		{
 			if (!IsDisposed)
 			{
-				Unload();
+				Dav1dfile.df_close(Handle);
-				Running = false;
-
-				if (disposing)
-				{
-					Thread.Join();
-				}
 			}
 			base.Dispose(disposing);
 		}

src/Video/VideoPlayer.cs

@@ -16,15 +16,18 @@ namespace MoonWorks.Video
 		public float PlaybackSpeed { get; set; } = 1;
 
 		private VideoAV1 Video = null;
-		private VideoAV1Stream Stream { get; }
+		private VideoAV1Stream CurrentStream = null;
 
+		private Task ReadNextFrameTask;
+		private Task ResetStreamATask;
+		private Task ResetStreamBTask;
+
+		private GraphicsDevice GraphicsDevice;
 		private Texture yTexture = null;
 		private Texture uTexture = null;
 		private Texture vTexture = null;
 		private Sampler LinearSampler;
 
-		private TransferBuffer TransferBuffer;
-
 		private int currentFrame;
 
 		private Stopwatch timer;
@@ -33,7 +36,7 @@ namespace MoonWorks.Video
 
 		public VideoPlayer(GraphicsDevice device) : base(device)
 		{
-			Stream = new VideoAV1Stream(device);
+			GraphicsDevice = device;
 
 			LinearSampler = new Sampler(device, SamplerCreateInfo.LinearClamp);
 
@@ -48,50 +51,50 @@ namespace MoonWorks.Video
 		{
 			if (Video != video)
 			{
-				Unload();
+				Stop();
 
 				if (RenderTexture == null)
 				{
-					RenderTexture = CreateRenderTexture(Device, video.Width, video.Height);
+					RenderTexture = CreateRenderTexture(GraphicsDevice, video.Width, video.Height);
 				}
 
 				if (yTexture == null)
 				{
-					yTexture = CreateSubTexture(Device, video.Width, video.Height);
+					yTexture = CreateSubTexture(GraphicsDevice, video.Width, video.Height);
 				}
 
 				if (uTexture == null)
 				{
-					uTexture = CreateSubTexture(Device, video.UVWidth, video.UVHeight);
+					uTexture = CreateSubTexture(GraphicsDevice, video.UVWidth, video.UVHeight);
 				}
 
 				if (vTexture == null)
 				{
-					vTexture = CreateSubTexture(Device, video.UVWidth, video.UVHeight);
+					vTexture = CreateSubTexture(GraphicsDevice, video.UVWidth, video.UVHeight);
 				}
 
 				if (video.Width != RenderTexture.Width || video.Height != RenderTexture.Height)
 				{
 					RenderTexture.Dispose();
-					RenderTexture = CreateRenderTexture(Device, video.Width, video.Height);
+					RenderTexture = CreateRenderTexture(GraphicsDevice, video.Width, video.Height);
 				}
 
 				if (video.Width != yTexture.Width || video.Height != yTexture.Height)
 				{
 					yTexture.Dispose();
-					yTexture = CreateSubTexture(Device, video.Width, video.Height);
+					yTexture = CreateSubTexture(GraphicsDevice, video.Width, video.Height);
 				}
 
 				if (video.UVWidth != uTexture.Width || video.UVHeight != uTexture.Height)
 				{
 					uTexture.Dispose();
-					uTexture = CreateSubTexture(Device, video.UVWidth, video.UVHeight);
+					uTexture = CreateSubTexture(GraphicsDevice, video.UVWidth, video.UVHeight);
 				}
 
 				if (video.UVWidth != vTexture.Width || video.UVHeight != vTexture.Height)
 				{
 					vTexture.Dispose();
-					vTexture = CreateSubTexture(Device, video.UVWidth, video.UVHeight);
+					vTexture = CreateSubTexture(GraphicsDevice, video.UVWidth, video.UVHeight);
 				}
 
 				Video = video;
@@ -152,7 +155,7 @@ namespace MoonWorks.Video
 			lastTimestamp = 0;
 			timeElapsed = 0;
 
-			ResetDav1dStreams();
+			InitializeDav1dStream();
 
 			State = VideoState.Stopped;
 		}
@@ -162,21 +165,9 @@ namespace MoonWorks.Video
 		/// </summary>
 		public void Unload()
 		{
-			if (Video == null)
+			Stop();
-			{
+			ResetStreamATask?.Wait();
-				return;
+			ResetStreamBTask?.Wait();
-			}
-
-			timer.Stop();
-			timer.Reset();
-
-			lastTimestamp = 0;
-			timeElapsed = 0;
-
-			State = VideoState.Stopped;
-
-			Stream.Unload();
-
 			Video = null;
 		}
 
@@ -196,26 +187,38 @@ namespace MoonWorks.Video
 			int thisFrame = ((int) (timeElapsed / (1000.0 / Video.FramesPerSecond)));
 			if (thisFrame > currentFrame)
 			{
-				if (Stream.FrameDataUpdated)
+				if (CurrentStream.FrameDataUpdated)
 				{
 					UpdateRenderTexture();
-					Stream.FrameDataUpdated = false;
+					CurrentStream.FrameDataUpdated = false;
 				}
 
 				currentFrame = thisFrame;
-				Stream.ReadNextFrame();
+				ReadNextFrameTask = Task.Run(CurrentStream.ReadNextFrame);
+				ReadNextFrameTask.ContinueWith(HandleTaskException, TaskContinuationOptions.OnlyOnFaulted);
 			}
 
-			if (Stream.Ended)
+			if (CurrentStream.Ended)
 			{
 				timer.Stop();
 				timer.Reset();
 
-				Stream.Reset();
+				var task = Task.Run(CurrentStream.Reset);
+				task.ContinueWith(HandleTaskException, TaskContinuationOptions.OnlyOnFaulted);
+
+				if (CurrentStream == Video.StreamA)
+				{
+					ResetStreamATask = task;
+				}
+				else
+				{
+					ResetStreamBTask = task;
+				}
 
 				if (Loop)
 				{
-					// Start over!
+					// Start over on the next stream!
+					CurrentStream = (CurrentStream == Video.StreamA) ? Video.StreamB : Video.StreamA;
 					currentFrame = -1;
 					timer.Start();
 				}
@@ -228,90 +231,40 @@ namespace MoonWorks.Video
 
 		private void UpdateRenderTexture()
 		{
-			uint uOffset;
+			lock (CurrentStream)
-			uint vOffset;
-			uint yStride;
-			uint uvStride;
-
-			lock (Stream)
 			{
-				var ySpan = new Span<byte>((void*) Stream.yDataHandle, (int) Stream.yDataLength);
+				var commandBuffer = GraphicsDevice.AcquireCommandBuffer();
-				var uSpan = new Span<byte>((void*) Stream.uDataHandle, (int) Stream.uvDataLength);
-				var vSpan = new Span<byte>((void*) Stream.vDataHandle, (int) Stream.uvDataLength);
 
-				if (TransferBuffer == null || TransferBuffer.Size < ySpan.Length + uSpan.Length + vSpan.Length)
+				commandBuffer.SetTextureDataYUV(
-				{
-					TransferBuffer?.Dispose();
-					TransferBuffer = new TransferBuffer(Device, TransferUsage.Texture, (uint) (ySpan.Length + uSpan.Length + vSpan.Length));
-				}
-				TransferBuffer.SetData(ySpan, 0, TransferOptions.Cycle);
-				TransferBuffer.SetData(uSpan, (uint) ySpan.Length, TransferOptions.Unsafe);
-				TransferBuffer.SetData(vSpan, (uint) (ySpan.Length + uSpan.Length), TransferOptions.Unsafe);
-
-				uOffset = (uint) ySpan.Length;
-				vOffset = (uint) (ySpan.Length + vSpan.Length);
-
-				yStride = Stream.yStride;
-				uvStride = Stream.uvStride;
-			}
-
-			var commandBuffer = Device.AcquireCommandBuffer();
-
-			commandBuffer.BeginCopyPass();
-
-			commandBuffer.UploadToTexture(
-				TransferBuffer,
 					yTexture,
-				new BufferImageCopy
-				{
-					BufferOffset = 0,
-					BufferStride = yStride,
-					BufferImageHeight = yTexture.Height
-				},
-				WriteOptions.Cycle
-			);
-
-			commandBuffer.UploadToTexture(
-				TransferBuffer,
 					uTexture,
-				new BufferImageCopy{
-					BufferOffset = uOffset,
-					BufferStride = uvStride,
-					BufferImageHeight = uTexture.Height
-				},
-				WriteOptions.Cycle
-			);
-
-			commandBuffer.UploadToTexture(
-				TransferBuffer,
 					vTexture,
-				new BufferImageCopy
+					CurrentStream.yDataHandle,
-				{
+					CurrentStream.uDataHandle,
-					BufferOffset = vOffset,
+					CurrentStream.vDataHandle,
-					BufferStride = uvStride,
+					CurrentStream.yDataLength,
-					BufferImageHeight = vTexture.Height
+					CurrentStream.uvDataLength,
-				},
+					CurrentStream.yStride,
-				WriteOptions.Cycle
+					CurrentStream.uvStride
 				);
 
-			commandBuffer.EndCopyPass();
-
 				commandBuffer.BeginRenderPass(
-				new ColorAttachmentInfo(RenderTexture, WriteOptions.Cycle, Color.Black)
+					new ColorAttachmentInfo(RenderTexture, Color.Black)
 				);
 
-			commandBuffer.BindGraphicsPipeline(Device.VideoPipeline);
+				commandBuffer.BindGraphicsPipeline(GraphicsDevice.VideoPipeline);
 				commandBuffer.BindFragmentSamplers(
 					new TextureSamplerBinding(yTexture, LinearSampler),
 					new TextureSamplerBinding(uTexture, LinearSampler),
 					new TextureSamplerBinding(vTexture, LinearSampler)
 				);
 
-			commandBuffer.DrawPrimitives(0, 1);
+				commandBuffer.DrawPrimitives(0, 1, 0, 0);
 
 				commandBuffer.EndRenderPass();
 
-			Device.Submit(commandBuffer);
+				GraphicsDevice.Submit(commandBuffer);
+			}
 		}
 
 		private static Texture CreateRenderTexture(GraphicsDevice graphicsDevice, int width, int height)
@@ -338,14 +291,23 @@ namespace MoonWorks.Video
 
 		private void InitializeDav1dStream()
 		{
-			Stream.Load(Video.Filename);
+			ReadNextFrameTask?.Wait();
+
+			ResetStreamATask = Task.Run(Video.StreamA.Reset);
+			ResetStreamATask.ContinueWith(HandleTaskException, TaskContinuationOptions.OnlyOnFaulted);
+			ResetStreamBTask = Task.Run(Video.StreamB.Reset);
+			ResetStreamBTask.ContinueWith(HandleTaskException, TaskContinuationOptions.OnlyOnFaulted);
+
+			CurrentStream = Video.StreamA;
 			currentFrame = -1;
 		}
 
-		private void ResetDav1dStreams()
+		private static void HandleTaskException(Task task)
 		{
-			Stream.Reset();
+			if (task.Exception.InnerException is not TaskCanceledException)
-			currentFrame = -1;
+			{
+				throw task.Exception;
+			}
 		}
 
 		protected override void Dispose(bool disposing)

src/Window.cs

@@ -19,18 +19,8 @@ namespace MoonWorks
 		internal Texture SwapchainTexture { get; set; }
 
 		public bool Claimed { get; internal set; }
-		public MoonWorks.Graphics.SwapchainComposition SwapchainComposition { get; internal set; }
 		public MoonWorks.Graphics.TextureFormat SwapchainFormat { get; internal set; }
 
-		public (int, int) Position
-		{
-			get
-			{
-				SDL.SDL_GetWindowPosition(Handle, out var x, out var y);
-				return (x, y);
-			}
-		}
-
 		private bool IsDisposed;
 
 		private static Dictionary<uint, Window> idLookup = new Dictionary<uint, Window>();
@@ -123,14 +113,6 @@ namespace MoonWorks
 			}
 		}
 
-		/// <summary>
-		/// Sets the window position.
-		/// </summary>
-		public void SetPosition(int x, int y)
-		{
-			SDL.SDL_SetWindowPosition(Handle, x, y);
-		}
-
 		internal static Window Lookup(uint windowID)
 		{
 			return idLookup.ContainsKey(windowID) ? idLookup[windowID] : null;

src/WindowCreateInfo.cs

@@ -22,13 +22,9 @@
 		/// </summary>
 		public ScreenMode ScreenMode;
 		/// <summary>
-		/// Specifies the swapchain composition. Use SDR unless you know what you're doing.
-		/// </summary>
-		public Graphics.SwapchainComposition SwapchainComposition;
-		/// <summary>
 		/// Specifies the presentation mode for the window. Roughly equivalent to V-Sync.
 		/// </summary>
-		public Graphics.PresentMode PresentMode;
+		public PresentMode PresentMode;
 		/// <summary>
 		/// Whether the window can be resized using the operating system's window dragging feature.
 		/// </summary>
@@ -43,7 +39,7 @@
 			uint windowWidth,
 			uint windowHeight,
 			ScreenMode screenMode,
-			Graphics.PresentMode presentMode,
+			PresentMode presentMode,
 			bool systemResizable = false,
 			bool startMaximized = false
 		) {