rename video shaders

.gitmodules

@@ -10,6 +10,6 @@
 [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 "lib/Theorafile"]
+	path = lib/Theorafile
+	url = https://github.com/FNA-XNA/Theorafile.git

MoonWorks.csproj

@@ -1,7 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFramework>net8.0</TargetFramework>
+		<TargetFrameworks>net7.0</TargetFrameworks>
+		<Platforms>x64</Platforms>
 		<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
 		<LangVersion>11</LangVersion>
 	</PropertyGroup>
@@ -14,29 +15,13 @@
 		<Compile Include="lib\FAudio\csharp\FAudio.cs" />
 		<Compile Include="lib\RefreshCS\src\Refresh.cs" />
 		<Compile Include="lib\SDL2-CS\src\SDL2.cs" />
+		<Compile Include="lib\Theorafile\csharp\Theorafile.cs" />
 		<Compile Include="lib\WellspringCS\WellspringCS.cs" />
-		<Compile Include="lib\dav1dfile\csharp\dav1dfile.cs" />
 	</ItemGroup>
 
 	<ItemGroup>
 		<None Include="MoonWorks.dll.config">
 			<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-			<CopyToPublishDirectory>Never</CopyToPublishDirectory>
 		</None>
 	</ItemGroup>
-
-	<ItemGroup>
-		<EmbeddedResource Include="src\Graphics\StockShaders\Binary\video_fullscreen.vert.refresh">
-			<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>
-		</EmbeddedResource>
-		<EmbeddedResource Include="src\Graphics\StockShaders\Binary\text_transform.vert.refresh">
-			<LogicalName>MoonWorks.Graphics.StockShaders.TextTransform.vert.refresh</LogicalName>
-		</EmbeddedResource>
-		<EmbeddedResource Include="src\Graphics\StockShaders\Binary\text_msdf.frag.refresh">
-			<LogicalName>MoonWorks.Graphics.StockShaders.TextMSDF.frag.refresh</LogicalName>
-		</EmbeddedResource>
-	</ItemGroup>
 </Project>

MoonWorks.dll.config

@@ -5,18 +5,18 @@
 	<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.1.dylib"/>
-	<dllmap dll="Refresh" os="linux,freebsd,netbsd" target="libRefresh.so.1"/>
+	<dllmap dll="Refresh" os="osx" target="libRefresh.0.dylib"/>
+	<dllmap dll="Refresh" os="linux,freebsd,netbsd" target="libRefresh.so.0"/>
 
 	<dllmap dll="FAudio" os="windows" target="FAudio.dll"/>
 	<dllmap dll="FAudio" os="osx" target="libFAudio.0.dylib"/>
 	<dllmap dll="FAudio" os="linux,freebsd,netbsd" target="libFAudio.so.0"/>
 
 	<dllmap dll="Wellspring" os="windows" target="Wellspring.dll"/>
-	<dllmap dll="Wellspring" os="osx" target="libWellspring.1.dylib"/>
-	<dllmap dll="Wellspring" os="linux,freebsd,netbsd" target="libWellspring.so.1"/>
+	<dllmap dll="Wellspring" os="osx" target="libWellspring.0.dylib"/>
+	<dllmap dll="Wellspring" os="linux,freebsd,netbsd" target="libWellspring.so.0"/>
 
-	<dllmap dll="dav1dfile" os="windows" target="dav1dfile.dll"/>
-	<dllmap dll="dav1dfile" os="osx" target="libdav1dfile.1.dylib"/>
-	<dllmap dll="dav1dfile" os="linux,freebsd,netbsd,openbsd" target="libdav1dfile.so.1"/>
+	<dllmap dll="Theorafile" os="windows" target="libtheorafile.dll"/>
+	<dllmap dll="Theorafile" os="osx" target="libtheorafile.dylib"/>
+	<dllmap dll="Theorafile" os="linux,freebsd,netbsd" target="libtheorafile.so"/>
 </configuration>

README.md

@@ -12,13 +12,9 @@ MoonWorks uses strictly Free Open Source Software. It will never have any kind o
 
 ## Documentation
 
-API Reference: https://moonside.games/docs/moonworksapi/
-
 High-level documentation is provided here: https://moonside.games/docs/moonworks/
 
-The source is documented in doc comments that your preferred IDE can read.
-
-Join our Discord! https://discord.gg/ujhwdkHmhN
+For an actual API reference, the source is documented in doc comments that your preferred IDE can read.
 
 ## Dependencies
 
@@ -26,7 +22,7 @@ Join our Discord! https://discord.gg/ujhwdkHmhN
 * [Refresh](https://gitea.moonside.games/MoonsideGames/Refresh) - Graphics
 * [FAudio](https://github.com/FNA-XNA/FAudio) - Audio
 * [Wellspring](https://gitea.moonside.games/MoonsideGames/Wellspring) - Font Rendering
-* [dav1dfile](https://github.com/MoonsideGames/dav1dfile) - Compressed Video
+* [Theorafile](https://github.com/FNA-XNA/Theorafile) - Compressed Video
 
 Prebuilt dependencies can be obtained here: https://moonside.games/files/moonlibs.tar.bz2
 

lib/FAudio

@@ -1 +1 @@
-Subproject commit 60480416bda930bf7544e6abe31b937f0daa0256
+Subproject commit 11ba6b37509a6c2fa2690f2643ee7bf5ce2ab4f2

lib/RefreshCS

@@ -1 +1 @@
-Subproject commit b5325e6d0329eeb35b074091a569a5f679852d28
+Subproject commit 1643061386177f62b516ccaad0ea04607cae2333

lib/SDL2-CS

@@ -1 +1 @@
-Subproject commit e4afbb848586fca530b6538320f799f81a18b941
+Subproject commit f8c6fc407fbb22072fdafcda918aec52b2102519

lib/Theorafile

@@ -0,0 +1 @@
+Subproject commit 8f9419ea856480e08294698e1d6be8752df3710b

lib/WellspringCS

@@ -1 +1 @@
-Subproject commit 074f2afc833b221906bb2468735041ce78f2cb89
+Subproject commit f8872bae59e394b0f8a35224bb39ab8fd041af97

lib/dav1dfile

@@ -1 +0,0 @@
-Subproject commit 5065e2cd4662dbe023b77a45ef967f975170dfff

src/Audio/AudioBuffer.cs

@@ -1,79 +0,0 @@
-using System;
-using System.Runtime.InteropServices;
-
-namespace MoonWorks.Audio
-{
-	/// <summary>
-	/// Contains raw audio data in a specified Format. <br/>
-	/// Submit this to a SourceVoice to play audio.
-	/// </summary>
-	public class AudioBuffer : AudioResource
-	{
-		IntPtr BufferDataPtr;
-		uint BufferDataLength;
-		private bool OwnsBufferData;
-
-		public Format Format { get; }
-
-		/// <summary>
-		/// Create a new AudioBuffer.
-		/// </summary>
-		/// <param name="ownsBufferData">If true, the buffer data will be destroyed when this AudioBuffer is destroyed.</param>
-		public AudioBuffer(
-			AudioDevice device,
-			Format format,
-			IntPtr bufferPtr,
-			uint bufferLengthInBytes,
-			bool ownsBufferData) : base(device)
-		{
-			Format = format;
-			BufferDataPtr = bufferPtr;
-			BufferDataLength = bufferLengthInBytes;
-			OwnsBufferData = ownsBufferData;
-		}
-
-		/// <summary>
-		/// Create another AudioBuffer from this audio buffer.
-		/// It will not own the buffer data.
-		/// </summary>
-		/// <param name="offset">Offset in bytes from the top of the original buffer.</param>
-		/// <param name="length">Length in bytes of the new buffer.</param>
-		/// <returns></returns>
-		public AudioBuffer Slice(int offset, uint length)
-		{
-			return new AudioBuffer(Device, Format, BufferDataPtr + offset, length, false);
-		}
-
-		/// <summary>
-		/// Create an FAudioBuffer struct from this AudioBuffer.
-		/// </summary>
-		/// <param name="loop">Whether we should set the FAudioBuffer to loop.</param>
-		public FAudio.FAudioBuffer ToFAudioBuffer(bool loop = false)
-		{
-			return new FAudio.FAudioBuffer
-			{
-				Flags = FAudio.FAUDIO_END_OF_STREAM,
-				pContext = IntPtr.Zero,
-				pAudioData = BufferDataPtr,
-				AudioBytes = BufferDataLength,
-				PlayBegin = 0,
-				PlayLength = 0,
-				LoopBegin = 0,
-				LoopLength = 0,
-				LoopCount = loop ? FAudio.FAUDIO_LOOP_INFINITE : 0
-			};
-		}
-
-		protected override unsafe void Dispose(bool disposing)
-		{
-			if (!IsDisposed)
-			{
-				if (OwnsBufferData)
-				{
-					NativeMemory.Free((void*) BufferDataPtr);
-				}
-			}
-			base.Dispose(disposing);
-		}
-	}
-}

src/Audio/AudioDataOgg.cs

@@ -1,147 +0,0 @@
-using System;
-using System.IO;
-using System.Runtime.InteropServices;
-
-namespace MoonWorks.Audio
-{
-	/// <summary>
-	/// Streamable audio in Ogg format.
-	/// </summary>
-	public class AudioDataOgg : AudioDataStreamable
-	{
-		private IntPtr FileDataPtr = IntPtr.Zero;
-		private IntPtr VorbisHandle = IntPtr.Zero;
-
-		private string FilePath;
-
-		public override bool Loaded => VorbisHandle != IntPtr.Zero;
-		public override uint DecodeBufferSize => 32768;
-
-		public AudioDataOgg(AudioDevice device, string filePath) : base(device)
-		{
-			FilePath = filePath;
-
-			var handle = FAudio.stb_vorbis_open_filename(filePath, out var error, IntPtr.Zero);
-
-			if (error != 0)
-			{
-				throw new InvalidOperationException("Error loading file!");
-			}
-
-			var info = FAudio.stb_vorbis_get_info(handle);
-
-			Format = new Format
-			{
-				Tag = FormatTag.IEEE_FLOAT,
-				BitsPerSample = 32,
-				Channels = (ushort) info.channels,
-				SampleRate = info.sample_rate
-			};
-
-			FAudio.stb_vorbis_close(handle);
-		}
-
-		public override unsafe void Decode(void* buffer, int bufferLengthInBytes, out int filledLengthInBytes, out bool reachedEnd)
-		{
-			var lengthInFloats = bufferLengthInBytes / sizeof(float);
-
-			/* NOTE: this function returns samples per channel, not total samples */
-			var samples = FAudio.stb_vorbis_get_samples_float_interleaved(
-				VorbisHandle,
-				Format.Channels,
-				(IntPtr) buffer,
-				lengthInFloats
-			);
-
-			var sampleCount = samples * Format.Channels;
-			reachedEnd = sampleCount < lengthInFloats;
-			filledLengthInBytes = sampleCount * sizeof(float);
-		}
-
-		/// <summary>
-		/// Prepares the Ogg data for streaming.
-		/// </summary>
-		public override unsafe void Load()
-		{
-			if (!Loaded)
-			{
-				var fileStream = new FileStream(FilePath, FileMode.Open, FileAccess.Read);
-				FileDataPtr = (nint) NativeMemory.Alloc((nuint) fileStream.Length);
-				var fileDataSpan = new Span<byte>((void*) FileDataPtr, (int) fileStream.Length);
-				fileStream.ReadExactly(fileDataSpan);
-				fileStream.Close();
-
-				VorbisHandle = FAudio.stb_vorbis_open_memory(FileDataPtr, fileDataSpan.Length, out int error, IntPtr.Zero);
-				if (error != 0)
-				{
-					NativeMemory.Free((void*) FileDataPtr);
-					Logger.LogError("Error opening OGG file!");
-					Logger.LogError("Error: " + error);
-					throw new InvalidOperationException("Error opening OGG file!");
-				}
-			}
-		}
-
-		public override void Seek(uint sampleFrame)
-		{
-			FAudio.stb_vorbis_seek(VorbisHandle, sampleFrame);
-		}
-
-		/// <summary>
-		/// Unloads the Ogg data, freeing resources.
-		/// </summary>
-		public override unsafe void Unload()
-		{
-			if (Loaded)
-			{
-				FAudio.stb_vorbis_close(VorbisHandle);
-				NativeMemory.Free((void*) FileDataPtr);
-
-				VorbisHandle = IntPtr.Zero;
-				FileDataPtr = IntPtr.Zero;
-			}
-		}
-
-		/// <summary>
-		/// Loads an entire ogg file into an AudioBuffer. Useful for static audio.
-		/// </summary>
-		public static unsafe AudioBuffer CreateBuffer(AudioDevice device, string filePath)
-		{
-			var filePointer = FAudio.stb_vorbis_open_filename(filePath, out var error, IntPtr.Zero);
-
-			if (error != 0)
-			{
-				throw new InvalidOperationException("Error loading file!");
-			}
-			var info = FAudio.stb_vorbis_get_info(filePointer);
-			var lengthInFloats =
-				FAudio.stb_vorbis_stream_length_in_samples(filePointer) * info.channels;
-			var lengthInBytes = lengthInFloats * Marshal.SizeOf<float>();
-			var buffer = NativeMemory.Alloc((nuint) lengthInBytes);
-
-			FAudio.stb_vorbis_get_samples_float_interleaved(
-				filePointer,
-				info.channels,
-				(nint) buffer,
-				(int) lengthInFloats
-			);
-
-			FAudio.stb_vorbis_close(filePointer);
-
-			var format = new Format
-			{
-				Tag = FormatTag.IEEE_FLOAT,
-				BitsPerSample = 32,
-				Channels = (ushort) info.channels,
-				SampleRate = info.sample_rate
-			};
-
-			return new AudioBuffer(
-				device,
-				format,
-				(nint) buffer,
-				(uint) lengthInBytes,
-				true);
-		}
-	}
-}

src/Audio/AudioDataQoa.cs

@@ -1,164 +0,0 @@
-using System;
-using System.IO;
-using System.Runtime.InteropServices;
-
-namespace MoonWorks.Audio
-{
-	/// <summary>
-	/// Streamable audio in QOA format.
-	/// </summary>
-	public class AudioDataQoa : AudioDataStreamable
-	{
-		private IntPtr QoaHandle = IntPtr.Zero;
-		private IntPtr FileDataPtr = IntPtr.Zero;
-
-		private string FilePath;
-
-		private const uint QOA_MAGIC = 0x716f6166; /* 'qoaf' */
-
-		public override bool Loaded => QoaHandle != IntPtr.Zero;
-
-		private uint decodeBufferSize;
-		public override uint DecodeBufferSize => decodeBufferSize;
-
-		public AudioDataQoa(AudioDevice device, string filePath) : base(device)
-		{
-			FilePath = filePath;
-
-			using var stream = new FileStream(FilePath, FileMode.Open, FileAccess.Read);
-			using var reader = new BinaryReader(stream);
-
-			UInt64 fileHeader = ReverseEndianness(reader.ReadUInt64());
-			if ((fileHeader >> 32) != QOA_MAGIC)
-			{
-				throw new InvalidOperationException("Specified file is not a QOA file.");
-			}
-
-			uint totalSamplesPerChannel = (uint) (fileHeader & (0xFFFFFFFF));
-			if (totalSamplesPerChannel == 0)
-			{
-				throw new InvalidOperationException("Specified file is not a valid QOA file.");
-			}
-
-			UInt64 frameHeader = ReverseEndianness(reader.ReadUInt64());
-			uint channels = (uint) ((frameHeader >> 56) & 0x0000FF);
-			uint samplerate = (uint) ((frameHeader >> 32) & 0xFFFFFF);
-			uint samplesPerChannelPerFrame = (uint) ((frameHeader >> 16) & 0x00FFFF);
-
-			Format = new Format
-			{
-				Tag = FormatTag.PCM,
-				BitsPerSample = 16,
-				Channels = (ushort) channels,
-				SampleRate = samplerate
-			};
-
-			decodeBufferSize = channels * samplesPerChannelPerFrame * sizeof(short);
-		}
-
-		public override unsafe void Decode(void* buffer, int bufferLengthInBytes, out int filledLengthInBytes, out bool reachedEnd)
-		{
-			var lengthInShorts = bufferLengthInBytes / sizeof(short);
-
-			// NOTE: this function returns samples per channel!
-			var samples = FAudio.qoa_decode_next_frame(QoaHandle, (short*) buffer);
-
-			var sampleCount = samples * Format.Channels;
-			reachedEnd = sampleCount < lengthInShorts;
-			filledLengthInBytes = (int) (sampleCount * sizeof(short));
-		}
-
-		/// <summary>
-		/// Prepares qoa data for streaming.
-		/// </summary>
-		public override unsafe void Load()
-		{
-			if (!Loaded)
-			{
-				var fileStream = new FileStream(FilePath, FileMode.Open, FileAccess.Read);
-				FileDataPtr = (nint) NativeMemory.Alloc((nuint) fileStream.Length);
-				var fileDataSpan = new Span<byte>((void*) FileDataPtr, (int) fileStream.Length);
-				fileStream.ReadExactly(fileDataSpan);
-				fileStream.Close();
-
-				QoaHandle = FAudio.qoa_open_from_memory((char*) FileDataPtr, (uint) fileDataSpan.Length, 0);
-				if (QoaHandle == IntPtr.Zero)
-				{
-					NativeMemory.Free((void*) FileDataPtr);
-					Logger.LogError("Error opening QOA file!");
-					throw new InvalidOperationException("Error opening QOA file!");
-				}
-			}
-		}
-
-		public override void Seek(uint sampleFrame)
-		{
-			FAudio.qoa_seek_frame(QoaHandle, (int) sampleFrame);
-		}
-
-		/// <summary>
-		/// Unloads the qoa data, freeing resources.
-		/// </summary>
-		public override unsafe void Unload()
-		{
-			if (Loaded)
-			{
-				FAudio.qoa_close(QoaHandle);
-				NativeMemory.Free((void*) FileDataPtr);
-
-				QoaHandle = IntPtr.Zero;
-				FileDataPtr = IntPtr.Zero;
-			}
-		}
-
-		/// <summary>
-		/// Loads the entire qoa file into an AudioBuffer. Useful for static audio.
-		/// </summary>
-		public unsafe static AudioBuffer CreateBuffer(AudioDevice device, string filePath)
-		{
-			using var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
-			var fileDataPtr = NativeMemory.Alloc((nuint) fileStream.Length);
-			var fileDataSpan = new Span<byte>(fileDataPtr, (int) fileStream.Length);
-			fileStream.ReadExactly(fileDataSpan);
-			fileStream.Close();
-
-			var qoaHandle = FAudio.qoa_open_from_memory((char*) fileDataPtr, (uint) fileDataSpan.Length, 0);
-			if (qoaHandle == 0)
-			{
-				NativeMemory.Free(fileDataPtr);
-				Logger.LogError("Error opening QOA file!");
-				throw new InvalidOperationException("Error opening QOA file!");
-			}
-
-			FAudio.qoa_attributes(qoaHandle, out var channels, out var samplerate, out var samples_per_channel_per_frame, out var total_samples_per_channel);
-
-			var bufferLengthInBytes = total_samples_per_channel * channels * sizeof(short);
-			var buffer = NativeMemory.Alloc(bufferLengthInBytes);
-			FAudio.qoa_decode_entire(qoaHandle, (short*) buffer);
-
-			FAudio.qoa_close(qoaHandle);
-			NativeMemory.Free(fileDataPtr);
-
-			var format = new Format
-			{
-				Tag = FormatTag.PCM,
-				BitsPerSample = 16,
-				Channels = (ushort) channels,
-				SampleRate = samplerate
-			};
-
-			return new AudioBuffer(device, format, (nint) buffer, bufferLengthInBytes, true);
-		}
-
-		private static unsafe UInt64 ReverseEndianness(UInt64 value)
-		{
-			byte* bytes = (byte*) &value;
-
-			return
-				((UInt64)(bytes[0]) << 56) | ((UInt64)(bytes[1]) << 48) |
-				((UInt64)(bytes[2]) << 40) | ((UInt64)(bytes[3]) << 32) |
-				((UInt64)(bytes[4]) << 24) | ((UInt64)(bytes[5]) << 16) |
-				((UInt64)(bytes[6]) <<  8) | ((UInt64)(bytes[7]) <<  0);
-		}
-	}
-}

src/Audio/AudioDataStreamable.cs

@@ -1,49 +0,0 @@
-namespace MoonWorks.Audio
-{
-	/// <summary>
-	/// Use this in conjunction with a StreamingVoice to play back streaming audio data.
-	/// </summary>
-	public abstract class AudioDataStreamable : AudioResource
-	{
-		public Format Format { get; protected set; }
-		public abstract bool Loaded { get; }
-		public abstract uint DecodeBufferSize { get; }
-
-		protected AudioDataStreamable(AudioDevice device) : base(device)
-		{
-		}
-
-		/// <summary>
-		/// Loads the raw audio data into memory to prepare it for stream decoding.
-		/// </summary>
-		public abstract void Load();
-
-		/// <summary>
-		/// Unloads the raw audio data from memory.
-		/// </summary>
-		public abstract void Unload();
-
-		/// <summary>
-		/// Seeks to the given sample frame.
-		/// </summary>
-		public abstract void Seek(uint sampleFrame);
-
-		/// <summary>
-		/// Attempts to decodes data of length bufferLengthInBytes into the provided buffer.
-		/// </summary>
-		/// <param name="buffer">The buffer that decoded bytes will be placed into.</param>
-		/// <param name="bufferLengthInBytes">Requested length of decoded audio data.</param>
-		/// <param name="filledLengthInBytes">How much data was actually filled in by the decode.</param>
-		/// <param name="reachedEnd">Whether the end of the data was reached on this decode.</param>
-		public abstract unsafe void Decode(void* buffer, int bufferLengthInBytes, out int filledLengthInBytes, out bool reachedEnd);
-
-		protected override void Dispose(bool disposing)
-		{
-			if (!IsDisposed)
-			{
-				Unload();
-			}
-			base.Dispose(disposing);
-		}
-	}
-}

src/Audio/AudioDataWav.cs

@@ -1,100 +0,0 @@
-using System;
-using System.IO;
-using System.Runtime.InteropServices;
-
-namespace MoonWorks.Audio
-{
-	public static class AudioDataWav
-	{
-		/// <summary>
-		/// Create an AudioBuffer containing all the WAV audio data in a file.
-		/// </summary>
-		/// <returns></returns>
-		public unsafe static AudioBuffer CreateBuffer(AudioDevice device, string filePath)
-		{
-			// mostly borrowed from https://github.com/FNA-XNA/FNA/blob/b71b4a35ae59970ff0070dea6f8620856d8d4fec/src/Audio/SoundEffect.cs#L385
-
-			// WaveFormatEx data
-			ushort wFormatTag;
-			ushort nChannels;
-			uint nSamplesPerSec;
-			uint nAvgBytesPerSec;
-			ushort nBlockAlign;
-			ushort wBitsPerSample;
-
-			using var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
-			using var reader = new BinaryReader(stream);
-
-			// RIFF Signature
-			string signature = new string(reader.ReadChars(4));
-			if (signature != "RIFF")
-			{
-				throw new NotSupportedException("Specified stream is not a wave file.");
-			}
-
-			reader.ReadUInt32(); // Riff Chunk Size
-
-			string wformat = new string(reader.ReadChars(4));
-			if (wformat != "WAVE")
-			{
-				throw new NotSupportedException("Specified stream is not a wave file.");
-			}
-
-			// WAVE Header
-			string format_signature = new string(reader.ReadChars(4));
-			while (format_signature != "fmt ")
-			{
-				reader.ReadBytes(reader.ReadInt32());
-				format_signature = new string(reader.ReadChars(4));
-			}
-
-			int format_chunk_size = reader.ReadInt32();
-
-			wFormatTag = reader.ReadUInt16();
-			nChannels = reader.ReadUInt16();
-			nSamplesPerSec = reader.ReadUInt32();
-			nAvgBytesPerSec = reader.ReadUInt32();
-			nBlockAlign = reader.ReadUInt16();
-			wBitsPerSample = reader.ReadUInt16();
-
-			// Reads residual bytes
-			if (format_chunk_size > 16)
-			{
-				reader.ReadBytes(format_chunk_size - 16);
-			}
-
-			// data Signature
-			string data_signature = new string(reader.ReadChars(4));
-			while (data_signature.ToLowerInvariant() != "data")
-			{
-				reader.ReadBytes(reader.ReadInt32());
-				data_signature = new string(reader.ReadChars(4));
-			}
-			if (data_signature != "data")
-			{
-				throw new NotSupportedException("Specified wave file is not supported.");
-			}
-
-			int waveDataLength = reader.ReadInt32();
-			var waveDataBuffer = NativeMemory.Alloc((nuint) waveDataLength);
-			var waveDataSpan = new Span<byte>(waveDataBuffer, waveDataLength);
-			stream.ReadExactly(waveDataSpan);
-
-			var format = new Format
-			{
-				Tag = (FormatTag) wFormatTag,
-				BitsPerSample = wBitsPerSample,
-				Channels = nChannels,
-				SampleRate = nSamplesPerSec
-			};
-
-			return new AudioBuffer(
-				device,
-				format,
-				(nint) waveDataBuffer,
-				(uint) waveDataLength,
-				true
-			);
-		}
-	}
-}

src/Audio/AudioDevice.cs

@@ -1,53 +1,41 @@
 using System;
 using System.Collections.Generic;
 using System.Runtime.InteropServices;
-using System.Threading;
 
 namespace MoonWorks.Audio
 {
-	/// <summary>
-	/// AudioDevice manages all audio-related concerns.
-	/// </summary>
 	public class AudioDevice : IDisposable
 	{
 		public IntPtr Handle { get; }
 		public byte[] Handle3D { get; }
+		public IntPtr MasteringVoice { get; }
 		public FAudio.FAudioDeviceDetails DeviceDetails { get; }
-
-		private IntPtr trueMasteringVoice;
-
-		// this is a fun little trick where we use a submix voice as a "faux" mastering voice
-		// this lets us maintain API consistency for effects like panning and reverb
-		private SubmixVoice fauxMasteringVoice;
-		public SubmixVoice MasteringVoice => fauxMasteringVoice;
+		public IntPtr ReverbVoice { get; }
 
 		public float CurveDistanceScalar = 1f;
 		public float DopplerScale = 1f;
 		public float SpeedOfSound = 343.5f;
 
-		private readonly HashSet<GCHandle> resourceHandles = new HashSet<GCHandle>();
-		private readonly HashSet<UpdatingSourceVoice> updatingSourceVoices = new HashSet<UpdatingSourceVoice>();
-
-		private AudioTweenManager AudioTweenManager;
-
-		private SourceVoicePool VoicePool;
-		private List<SourceVoice> VoicesToReturn = new List<SourceVoice>();
-
-		private const int Step = 200;
-		private TimeSpan UpdateInterval;
-		private System.Diagnostics.Stopwatch TickStopwatch = new System.Diagnostics.Stopwatch();
-		private long previousTickTime;
-		private Thread Thread;
-		private AutoResetEvent WakeSignal;
-		internal readonly object StateLock = new object();
-
-		private bool Running;
-		public bool IsDisposed { get; private set; }
-
-		internal unsafe AudioDevice()
+		private float masteringVolume = 1f;
+		public float MasteringVolume
 		{
-			UpdateInterval = TimeSpan.FromTicks(TimeSpan.TicksPerSecond / Step);
+			get => masteringVolume;
+			set
+			{
+				masteringVolume = value;
+				FAudio.FAudioVoice_SetVolume(MasteringVoice, masteringVolume, 0);
+			}
+		}
 
+		internal FAudio.FAudioVoiceSends ReverbSends;
+
+		private readonly List<WeakReference<AudioResource>> resources = new List<WeakReference<AudioResource>>();
+		private readonly List<WeakReference<StreamingSound>> streamingSounds = new List<WeakReference<StreamingSound>>();
+
+		private bool IsDisposed;
+
+		public unsafe AudioDevice()
+		{
 			FAudio.FAudioCreate(out var handle, 0, FAudio.FAUDIO_DEFAULT_PROCESSOR);
 			Handle = handle;
 
@@ -92,24 +80,25 @@ namespace MoonWorks.Audio
 			}
 
 			/* Init Mastering Voice */
-			var result = FAudio.FAudio_CreateMasteringVoice(
+			IntPtr masteringVoice;
+
+			if (FAudio.FAudio_CreateMasteringVoice(
 				Handle,
-				out trueMasteringVoice,
+				out masteringVoice,
 				FAudio.FAUDIO_DEFAULT_CHANNELS,
 				FAudio.FAUDIO_DEFAULT_SAMPLERATE,
 				0,
 				i,
 				IntPtr.Zero
-			);
-
-			if (result != 0)
+			) != 0)
 			{
-				Logger.LogError("Failed to create a mastering voice!");
-				Logger.LogError("Audio device creation failed!");
+				Logger.LogError("No mastering voice found!");
+				Handle = IntPtr.Zero;
+				FAudio.FAudio_Release(Handle);
 				return;
 			}
 
-			fauxMasteringVoice = SubmixVoice.CreateFauxMasteringVoice(this);
+			MasteringVoice = masteringVoice;
 
 			/* Init 3D Audio */
 
@@ -120,169 +109,139 @@ namespace MoonWorks.Audio
 				Handle3D
 			);
 
-			AudioTweenManager = new AudioTweenManager();
-			VoicePool = new SourceVoicePool(this);
+			/* Init reverb */
 
-			WakeSignal = new AutoResetEvent(true);
+			IntPtr reverbVoice;
 
-			Thread = new Thread(ThreadMain);
-			Thread.IsBackground = true;
-			Thread.Start();
+			IntPtr reverb;
+			FAudio.FAudioCreateReverb(out reverb, 0);
 
-			Running = true;
-
-			TickStopwatch.Start();
-			previousTickTime = 0;
-		}
-
-		private void ThreadMain()
-		{
-			while (Running)
-			{
-				lock (StateLock)
-				{
-					try
-					{
-						ThreadMainTick();
-					}
-					catch (Exception e)
-					{
-						Logger.LogError(e.ToString());
-					}
-				}
-
-				WakeSignal.WaitOne(UpdateInterval);
-			}
-		}
-
-		private void ThreadMainTick()
-		{
-			long tickDelta = TickStopwatch.Elapsed.Ticks - previousTickTime;
-			previousTickTime = TickStopwatch.Elapsed.Ticks;
-			float elapsedSeconds = (float) tickDelta / System.TimeSpan.TicksPerSecond;
-
-			AudioTweenManager.Update(elapsedSeconds);
-
-			foreach (var voice in updatingSourceVoices)
-			{
-				voice.Update();
-			}
-
-			foreach (var voice in VoicesToReturn)
-			{
-				if (voice is UpdatingSourceVoice updatingSourceVoice)
-				{
-					updatingSourceVoices.Remove(updatingSourceVoice);
-				}
-
-				voice.Reset();
-				VoicePool.Return(voice);
-			}
-
-			VoicesToReturn.Clear();
-		}
-
-		/// <summary>
-		/// Triggers all pending operations with the given syncGroup value.
-		/// </summary>
-		public void TriggerSyncGroup(uint syncGroup)
-		{
-			FAudio.FAudio_CommitChanges(Handle, syncGroup);
-		}
-
-		/// <summary>
-		/// Obtains an appropriate source voice from the voice pool.
-		/// </summary>
-		/// <param name="format">The format that the voice must match.</param>
-		/// <returns>A source voice with the given format.</returns>
-		public T Obtain<T>(Format format) where T : SourceVoice, IPoolable<T>
-		{
-			lock (StateLock)
-			{
-				var voice = VoicePool.Obtain<T>(format);
-
-				if (voice is UpdatingSourceVoice updatingSourceVoice)
-				{
-					updatingSourceVoices.Add(updatingSourceVoice);
-				}
-
-				return voice;
-			}
-		}
-
-		/// <summary>
-		/// Returns the source voice to the voice pool.
-		/// </summary>
-		/// <param name="voice"></param>
-		internal void Return(SourceVoice voice)
-		{
-			lock (StateLock)
-			{
-				VoicesToReturn.Add(voice);
-			}
-		}
-
-		internal void CreateTween(
-			Voice voice,
-			AudioTweenProperty property,
-			System.Func<float, float> easingFunction,
-			float start,
-			float end,
-			float duration,
-			float delayTime
-		) {
-			lock (StateLock)
-			{
-				AudioTweenManager.CreateTween(
-					voice,
-					property,
-					easingFunction,
-					start,
-					end,
-					duration,
-					delayTime
+			IntPtr chainPtr;
+			chainPtr = Marshal.AllocHGlobal(
+				Marshal.SizeOf<FAudio.FAudioEffectChain>()
 			);
-			}
+
+			FAudio.FAudioEffectChain* reverbChain = (FAudio.FAudioEffectChain*) chainPtr;
+			reverbChain->EffectCount = 1;
+			reverbChain->pEffectDescriptors = Marshal.AllocHGlobal(
+				Marshal.SizeOf<FAudio.FAudioEffectDescriptor>()
+			);
+
+			FAudio.FAudioEffectDescriptor* reverbDescriptor =
+				(FAudio.FAudioEffectDescriptor*) reverbChain->pEffectDescriptors;
+
+			reverbDescriptor->InitialState = 1;
+			reverbDescriptor->OutputChannels = (uint) (
+				(DeviceDetails.OutputFormat.Format.nChannels == 6) ? 6 : 1
+			);
+			reverbDescriptor->pEffect = reverb;
+
+			FAudio.FAudio_CreateSubmixVoice(
+				Handle,
+				out reverbVoice,
+				1, /* omnidirectional reverb */
+				DeviceDetails.OutputFormat.Format.nSamplesPerSec,
+				0,
+				0,
+				IntPtr.Zero,
+				chainPtr
+			);
+			FAudio.FAPOBase_Release(reverb);
+
+			Marshal.FreeHGlobal(reverbChain->pEffectDescriptors);
+			Marshal.FreeHGlobal(chainPtr);
+
+			ReverbVoice = reverbVoice;
+
+			/* Init reverb params */
+			// Defaults based on FAUDIOFX_I3DL2_PRESET_GENERIC
+
+			IntPtr reverbParamsPtr = Marshal.AllocHGlobal(
+				Marshal.SizeOf<FAudio.FAudioFXReverbParameters>()
+			);
+
+			FAudio.FAudioFXReverbParameters* reverbParams = (FAudio.FAudioFXReverbParameters*) reverbParamsPtr;
+			reverbParams->WetDryMix = 100.0f;
+			reverbParams->ReflectionsDelay = 7;
+			reverbParams->ReverbDelay = 11;
+			reverbParams->RearDelay = FAudio.FAUDIOFX_REVERB_DEFAULT_REAR_DELAY;
+			reverbParams->PositionLeft = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION;
+			reverbParams->PositionRight = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION;
+			reverbParams->PositionMatrixLeft = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION_MATRIX;
+			reverbParams->PositionMatrixRight = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION_MATRIX;
+			reverbParams->EarlyDiffusion = 15;
+			reverbParams->LateDiffusion = 15;
+			reverbParams->LowEQGain = 8;
+			reverbParams->LowEQCutoff = 4;
+			reverbParams->HighEQGain = 8;
+			reverbParams->HighEQCutoff = 6;
+			reverbParams->RoomFilterFreq = 5000f;
+			reverbParams->RoomFilterMain = -10f;
+			reverbParams->RoomFilterHF = -1f;
+			reverbParams->ReflectionsGain = -26.0200005f;
+			reverbParams->ReverbGain = 10.0f;
+			reverbParams->DecayTime = 1.49000001f;
+			reverbParams->Density = 100.0f;
+			reverbParams->RoomSize = FAudio.FAUDIOFX_REVERB_DEFAULT_ROOM_SIZE;
+			FAudio.FAudioVoice_SetEffectParameters(
+				ReverbVoice,
+				0,
+				reverbParamsPtr,
+				(uint) Marshal.SizeOf<FAudio.FAudioFXReverbParameters>(),
+				0
+			);
+			Marshal.FreeHGlobal(reverbParamsPtr);
+
+			/* Init reverb sends */
+
+			ReverbSends = new FAudio.FAudioVoiceSends
+			{
+				SendCount = 2,
+				pSends = Marshal.AllocHGlobal(
+					2 * Marshal.SizeOf<FAudio.FAudioSendDescriptor>()
+				)
+			};
+			FAudio.FAudioSendDescriptor* sendDesc = (FAudio.FAudioSendDescriptor*) ReverbSends.pSends;
+			sendDesc[0].Flags = 0;
+			sendDesc[0].pOutputVoice = MasteringVoice;
+			sendDesc[1].Flags = 0;
+			sendDesc[1].pOutputVoice = ReverbVoice;
 		}
 
-		internal void ClearTweens(
-			Voice voice,
-			AudioTweenProperty property
-		) {
-			lock (StateLock)
+		internal void Update()
 		{
-				AudioTweenManager.ClearTweens(voice, property);
+			for (var i = streamingSounds.Count - 1; i >= 0; i--)
+			{
+				var weakReference = streamingSounds[i];
+				if (weakReference.TryGetTarget(out var streamingSound))
+				{
+					streamingSound.Update();
 				}
-		}
-
-		internal void WakeThread()
+				else
 				{
-			WakeSignal.Set();
-		}
-
-		internal void AddResourceReference(GCHandle resourceReference)
-		{
-			lock (StateLock)
-			{
-				resourceHandles.Add(resourceReference);
-
-				if (resourceReference.Target is UpdatingSourceVoice updatableVoice)
-				{
-					updatingSourceVoices.Add(updatableVoice);
+					streamingSounds.RemoveAt(i);
 				}
 			}
 		}
 
-		internal void RemoveResourceReference(GCHandle resourceReference)
+		internal void AddDynamicSoundInstance(StreamingSound instance)
 		{
-			lock (StateLock)
-			{
-				resourceHandles.Remove(resourceReference);
-
-				if (resourceReference.Target is UpdatingSourceVoice updatableVoice)
-				{
-					updatingSourceVoices.Remove(updatableVoice);
+			streamingSounds.Add(new WeakReference<StreamingSound>(instance));
 		}
+
+		internal void AddResourceReference(WeakReference<AudioResource> resourceReference)
+		{
+			lock (resources)
+			{
+				resources.Add(resourceReference);
+			}
+		}
+
+		internal void RemoveResourceReference(WeakReference<AudioResource> resourceReference)
+		{
+			lock (resources)
+			{
+				resources.Remove(resourceReference);
 			}
 		}
 
@@ -290,54 +249,29 @@ namespace MoonWorks.Audio
 		{
 			if (!IsDisposed)
 			{
-				Running = false;
-
 				if (disposing)
 				{
-					Thread.Join();
-
-					// dispose all source voices first
-					foreach (var handle in resourceHandles)
+					for (var i = resources.Count - 1; i >= 0; i--)
 					{
-						if (handle.Target is SourceVoice voice)
-						{
-							voice.Dispose();
-						}
-					}
+						var weakReference = resources[i];
 
-					// dispose all submix voices except the faux mastering voice
-					foreach (var handle in resourceHandles)
-					{
-						if (handle.Target is SubmixVoice voice && voice != fauxMasteringVoice)
-						{
-							voice.Dispose();
-						}
-					}
-
-					// dispose the faux mastering voice
-					fauxMasteringVoice.Dispose();
-
-					// dispose the true mastering voice
-					FAudio.FAudioVoice_DestroyVoice(trueMasteringVoice);
-
-					// destroy all other audio resources
-					foreach (var handle in resourceHandles)
-					{
-						if (handle.Target is AudioResource resource)
+						if (weakReference.TryGetTarget(out var resource))
 						{
 							resource.Dispose();
 						}
 					}
-
-					resourceHandles.Clear();
+					resources.Clear();
 				}
 
+				FAudio.FAudioVoice_DestroyVoice(ReverbVoice);
+				FAudio.FAudioVoice_DestroyVoice(MasteringVoice);
 				FAudio.FAudio_Release(Handle);
 
 				IsDisposed = true;
 			}
 		}
 
+		// TODO: override finalizer only if 'Dispose(bool disposing)' has code to free unmanaged resources
 		~AudioDevice()
 		{
 			// Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method

src/Audio/AudioEmitter.cs

@@ -4,9 +4,6 @@ using MoonWorks.Math.Float;
 
 namespace MoonWorks.Audio
 {
-	/// <summary>
-	/// An emitter for 3D spatial audio.
-	/// </summary>
 	public class AudioEmitter : AudioResource
 	{
 		internal FAudio.F3DAUDIO_EMITTER emitterData;
@@ -132,5 +129,7 @@ namespace MoonWorks.Audio
 			emitterData.pReverbCurve = IntPtr.Zero;
 			emitterData.CurveDistanceScaler = 1.0f;
 		}
+
+		protected override void Destroy() { }
 	}
 }

src/Audio/AudioListener.cs

@@ -3,9 +3,6 @@ using MoonWorks.Math.Float;
 
 namespace MoonWorks.Audio
 {
-	/// <summary>
-	/// A listener for 3D spatial audio. Usually attached to a camera.
-	/// </summary>
 	public class AudioListener : AudioResource
 	{
 		internal FAudio.F3DAUDIO_LISTENER listenerData;
@@ -94,5 +91,7 @@ namespace MoonWorks.Audio
 			/* Unexposed variables, defaults based on XNA behavior */
 			listenerData.pCone = IntPtr.Zero;
 		}
+
+		protected override void Destroy() { }
 	}
 }

src/Audio/AudioResource.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Runtime.InteropServices;
 
 namespace MoonWorks.Audio
 {
@@ -9,24 +8,28 @@ namespace MoonWorks.Audio
 
 		public bool IsDisposed { get; private set; }
 
-		private GCHandle SelfReference;
+		private WeakReference<AudioResource> selfReference;
 
-		protected AudioResource(AudioDevice device)
+		public AudioResource(AudioDevice device)
 		{
 			Device = device;
 
-			SelfReference = GCHandle.Alloc(this, GCHandleType.Weak);
-			Device.AddResourceReference(SelfReference);
+			selfReference = new WeakReference<AudioResource>(this);
+			Device.AddResourceReference(selfReference);
 		}
 
+		protected abstract void Destroy();
+
 		protected virtual void Dispose(bool disposing)
 		{
 			if (!IsDisposed)
 			{
-				if (disposing)
+				Destroy();
+
+				if (selfReference != null)
 				{
-					Device.RemoveResourceReference(SelfReference);
-					SelfReference.Free();
+					Device.RemoveResourceReference(selfReference);
+					selfReference = null;
 				}
 
 				IsDisposed = true;
@@ -35,12 +38,8 @@ namespace MoonWorks.Audio
 
 		~AudioResource()
 		{
-			#if DEBUG
-			// If you see this log message, you leaked an audio resource without disposing it!
-			// We can't clean it up for you because this can cause catastrophic issues.
-			// You should really fix this when it happens.
-			Logger.LogWarn($"A resource of type {GetType().Name} was not Disposed.");
-			#endif
+			// Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
+			Dispose(disposing: false);
 		}
 
 		public void Dispose()

src/Audio/AudioTween.cs

@@ -1,58 +0,0 @@
-using System.Collections.Generic;
-using EasingFunction = System.Func<float, float>;
-
-namespace MoonWorks.Audio
-{
-	internal enum AudioTweenProperty
-	{
-		Pan,
-		Pitch,
-		Volume,
-		FilterFrequency,
-		Reverb
-	}
-
-	internal class AudioTween
-	{
-		public Voice Voice;
-		public AudioTweenProperty Property;
-		public EasingFunction EasingFunction;
-		public float Time;
-		public float StartValue;
-		public float EndValue;
-		public float DelayTime;
-		public float Duration;
-	}
-
-	internal class AudioTweenPool
-	{
-		private Queue<AudioTween> Tweens = new Queue<AudioTween>(16);
-
-		public AudioTweenPool()
-		{
-			for (int i = 0; i < 16; i += 1)
-			{
-				Tweens.Enqueue(new AudioTween());
-			}
-		}
-
-		public AudioTween Obtain()
-		{
-			if (Tweens.Count > 0)
-			{
-				var tween = Tweens.Dequeue();
-				return tween;
-			}
-			else
-			{
-				return new AudioTween();
-			}
-		}
-
-		public void Free(AudioTween tween)
-		{
-			tween.Voice = null;
-			Tweens.Enqueue(tween);
-		}
-	}
-}

src/Audio/AudioTweenManager.cs

@@ -1,159 +0,0 @@
-using System;
-using System.Collections.Generic;
-
-namespace MoonWorks.Audio
-{
-	internal class AudioTweenManager
-	{
-		private AudioTweenPool AudioTweenPool = new AudioTweenPool();
-		private readonly Dictionary<(Voice, AudioTweenProperty), AudioTween> AudioTweens = new Dictionary<(Voice, AudioTweenProperty), AudioTween>();
-		private readonly List<AudioTween> DelayedAudioTweens = new List<AudioTween>();
-
-		public void Update(float elapsedSeconds)
-		{
-			for (var i = DelayedAudioTweens.Count - 1; i >= 0; i--)
-			{
-				var audioTween = DelayedAudioTweens[i];
-				var voice = audioTween.Voice;
-
-				audioTween.Time += elapsedSeconds;
-
-				if (audioTween.Time >= audioTween.DelayTime)
-				{
-					// set the tween start value to the current value of the property
-					switch (audioTween.Property)
-					{
-						case AudioTweenProperty.Pan:
-							audioTween.StartValue = voice.Pan;
-							break;
-
-						case AudioTweenProperty.Pitch:
-							audioTween.StartValue = voice.Pitch;
-							break;
-
-						case AudioTweenProperty.Volume:
-							audioTween.StartValue = voice.Volume;
-							break;
-
-						case AudioTweenProperty.FilterFrequency:
-							audioTween.StartValue = voice.FilterFrequency;
-							break;
-
-						case AudioTweenProperty.Reverb:
-							audioTween.StartValue = voice.Reverb;
-							break;
-					}
-
-					audioTween.Time = 0;
-					DelayedAudioTweens.RemoveAt(i);
-
-					AddTween(audioTween);
-				}
-			}
-
-			foreach (var (key, audioTween) in AudioTweens)
-			{
-				bool finished = UpdateAudioTween(audioTween, elapsedSeconds);
-
-				if (finished)
-				{
-					AudioTweenPool.Free(audioTween);
-					AudioTweens.Remove(key);
-				}
-			}
-		}
-
-		public void CreateTween(
-			Voice voice,
-			AudioTweenProperty property,
-			System.Func<float, float> easingFunction,
-			float start,
-			float end,
-			float duration,
-			float delayTime
-		) {
-			var tween = AudioTweenPool.Obtain();
-			tween.Voice = voice;
-			tween.Property = property;
-			tween.EasingFunction = easingFunction;
-			tween.StartValue = start;
-			tween.EndValue = end;
-			tween.Duration = duration;
-			tween.Time = 0;
-			tween.DelayTime = delayTime;
-
-			if (delayTime == 0)
-			{
-				AddTween(tween);
-			}
-			else
-			{
-				DelayedAudioTweens.Add(tween);
-			}
-		}
-
-		public void ClearTweens(Voice voice, AudioTweenProperty property)
-		{
-			AudioTweens.Remove((voice, property));
-		}
-
-		private void AddTween(
-			AudioTween audioTween
-		) {
-			// if a tween with the same sound and property already exists, get rid of it
-			if (AudioTweens.TryGetValue((audioTween.Voice, audioTween.Property), out var currentTween))
-			{
-				AudioTweenPool.Free(currentTween);
-			}
-
-			AudioTweens[(audioTween.Voice, audioTween.Property)] = audioTween;
-		}
-
-		private static bool UpdateAudioTween(AudioTween audioTween, float delta)
-		{
-			float value;
-			audioTween.Time += delta;
-
-			var finished = audioTween.Time >= audioTween.Duration;
-			if (finished)
-			{
-				value = audioTween.EndValue;
-			}
-			else
-			{
-				value = MoonWorks.Math.Easing.Interp(
-					audioTween.StartValue,
-					audioTween.EndValue,
-					audioTween.Time,
-					audioTween.Duration,
-					audioTween.EasingFunction
-				);
-			}
-
-			switch (audioTween.Property)
-			{
-				case AudioTweenProperty.Pan:
-					audioTween.Voice.Pan = value;
-					break;
-
-				case AudioTweenProperty.Pitch:
-					audioTween.Voice.Pitch = value;
-					break;
-
-				case AudioTweenProperty.Volume:
-					audioTween.Voice.Volume = value;
-					break;
-
-				case AudioTweenProperty.FilterFrequency:
-					audioTween.Voice.FilterFrequency = value;
-					break;
-
-				case AudioTweenProperty.Reverb:
-					audioTween.Voice.Reverb = value;
-					break;
-			}
-
-			return finished;
-		}
-	}
-}

src/Audio/Format.cs

@@ -1,36 +0,0 @@
-namespace MoonWorks.Audio
-{
-	public enum FormatTag : ushort
-	{
-		Unknown = 0,
-		PCM = 1,
-		MSADPCM = 2,
-		IEEE_FLOAT = 3
-	}
-
-	/// <summary>
-	/// Describes the format of audio data. Usually specified in an audio file's header information.
-	/// </summary>
-	public record struct Format
-	{
-		public FormatTag Tag;
-		public ushort Channels;
-		public uint SampleRate;
-		public ushort BitsPerSample;
-
-		internal FAudio.FAudioWaveFormatEx ToFAudioFormat()
-		{
-			var blockAlign = (ushort) ((BitsPerSample / 8) * Channels);
-
-			return new FAudio.FAudioWaveFormatEx
-			{
-				wFormatTag = (ushort) Tag,
-				nChannels = Channels,
-				nSamplesPerSec = SampleRate,
-				wBitsPerSample = BitsPerSample,
-				nBlockAlign = blockAlign,
-				nAvgBytesPerSec = blockAlign * SampleRate
-			};
-		}
-	}
-}

src/Audio/IPoolable.cs

@@ -1,7 +0,0 @@
-namespace MoonWorks.Audio
-{
-	public interface IPoolable<T>
-	{
-		static abstract T Create(AudioDevice device, Format format);
-	}
-}

src/Audio/PersistentVoice.cs

@@ -1,28 +0,0 @@
-namespace MoonWorks.Audio
-{
-	/// <summary>
-	/// PersistentVoice should be used when you need to maintain a long-term reference to a source voice.
-	/// </summary>
-	public class PersistentVoice : SourceVoice, IPoolable<PersistentVoice>
-	{
-		public PersistentVoice(AudioDevice device, Format format) : base(device, format)
-		{
-		}
-
-		public static PersistentVoice Create(AudioDevice device, Format format)
-		{
-			return new PersistentVoice(device, format);
-		}
-
-		/// <summary>
-		/// Adds an AudioBuffer to the voice queue.
-		/// The voice processes and plays back the buffers in its queue in the order that they were submitted.
-		/// </summary>
-		/// <param name="buffer">The buffer to submit to the voice.</param>
-		/// <param name="loop">Whether the voice should loop this buffer.</param>
-		public void Submit(AudioBuffer buffer, bool loop = false)
-		{
-			Submit(buffer.ToFAudioBuffer(loop));
-		}
-	}
-}

src/Audio/ReverbEffect.cs

@@ -1,83 +0,0 @@
-using System;
-using System.Runtime.InteropServices;
-
-namespace MoonWorks.Audio
-{
-	/// <summary>
-	/// Use this in conjunction with SourceVoice.SetReverbEffectChain to add reverb to a voice.
-	/// </summary>
-	public unsafe class ReverbEffect : SubmixVoice
-	{
-		// Defaults based on FAUDIOFX_I3DL2_PRESET_GENERIC
-		public static FAudio.FAudioFXReverbParameters DefaultParams = new FAudio.FAudioFXReverbParameters
-		{
-			WetDryMix = 100.0f,
-			ReflectionsDelay = 7,
-			ReverbDelay = 11,
-			RearDelay = FAudio.FAUDIOFX_REVERB_DEFAULT_REAR_DELAY,
-			PositionLeft = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION,
-			PositionRight = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION,
-			PositionMatrixLeft = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION_MATRIX,
-			PositionMatrixRight = FAudio.FAUDIOFX_REVERB_DEFAULT_POSITION_MATRIX,
-			EarlyDiffusion = 15,
-			LateDiffusion = 15,
-			LowEQGain = 8,
-			LowEQCutoff = 4,
-			HighEQGain = 8,
-			HighEQCutoff = 6,
-			RoomFilterFreq = 5000f,
-			RoomFilterMain = -10f,
-			RoomFilterHF = -1f,
-			ReflectionsGain = -26.0200005f,
-			ReverbGain = 10.0f,
-			DecayTime = 1.49000001f,
-			Density = 100.0f,
-			RoomSize = FAudio.FAUDIOFX_REVERB_DEFAULT_ROOM_SIZE
-		};
-
-		public FAudio.FAudioFXReverbParameters Params { get; private set; }
-
-		public ReverbEffect(AudioDevice audioDevice, uint processingStage) : base(audioDevice, 1, audioDevice.DeviceDetails.OutputFormat.Format.nSamplesPerSec, processingStage)
-		{
-			/* Init reverb */
-			IntPtr reverb;
-			FAudio.FAudioCreateReverb(out reverb, 0);
-
-			var chain = new FAudio.FAudioEffectChain();
-			var descriptor = new FAudio.FAudioEffectDescriptor
-			{
-				InitialState = 1,
-				OutputChannels = 1,
-				pEffect = reverb
-			};
-
-			chain.EffectCount = 1;
-			chain.pEffectDescriptors = (nint) (&descriptor);
-
-			FAudio.FAudioVoice_SetEffectChain(
-				Handle,
-				ref chain
-			);
-
-			FAudio.FAPOBase_Release(reverb);
-
-			SetParams(DefaultParams);
-		}
-
-		public void SetParams(in FAudio.FAudioFXReverbParameters reverbParams)
-		{
-			Params = reverbParams;
-
-			fixed (FAudio.FAudioFXReverbParameters* reverbParamsPtr = &reverbParams)
-			{
-				FAudio.FAudioVoice_SetEffectParameters(
-					Handle,
-					0,
-					(nint) reverbParamsPtr,
-					(uint) Marshal.SizeOf<FAudio.FAudioFXReverbParameters>(),
-					0
-				);
-			}
-		}
-	}
-}

src/Audio/SoundInstance.cs

@@ -0,0 +1,366 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace MoonWorks.Audio
+{
+	public abstract class SoundInstance : AudioResource
+	{
+		internal IntPtr Handle;
+		internal FAudio.FAudioWaveFormatEx Format;
+
+		protected FAudio.F3DAUDIO_DSP_SETTINGS dspSettings;
+
+		public bool Is3D { get; protected set; }
+
+		public virtual SoundState State { get; protected set; }
+
+		private float pan = 0;
+		public float Pan
+		{
+			get => pan;
+			set
+			{
+				pan = value;
+
+				if (pan < -1f)
+				{
+					pan = -1f;
+				}
+				if (pan > 1f)
+				{
+					pan = 1f;
+				}
+
+				if (Is3D) { return; }
+
+				SetPanMatrixCoefficients();
+				FAudio.FAudioVoice_SetOutputMatrix(
+					Handle,
+					Device.MasteringVoice,
+					dspSettings.SrcChannelCount,
+					dspSettings.DstChannelCount,
+					dspSettings.pMatrixCoefficients,
+					0
+				);
+			}
+		}
+
+		private float pitch = 0;
+		public float Pitch
+		{
+			get => pitch;
+			set
+			{
+				pitch = Math.MathHelper.Clamp(value, -1f, 1f);
+				UpdatePitch();
+			}
+		}
+
+		private float volume = 1;
+		public float Volume
+		{
+			get => volume;
+			set
+			{
+				volume = value;
+				FAudio.FAudioVoice_SetVolume(Handle, volume, 0);
+			}
+		}
+
+		private float reverb;
+		public unsafe float Reverb
+		{
+			get => reverb;
+			set
+			{
+				reverb = value;
+
+				float* outputMatrix = (float*) dspSettings.pMatrixCoefficients;
+				outputMatrix[0] = reverb;
+				if (dspSettings.SrcChannelCount == 2)
+				{
+					outputMatrix[1] = reverb;
+				}
+
+				FAudio.FAudioVoice_SetOutputMatrix(
+					Handle,
+					Device.ReverbVoice,
+					dspSettings.SrcChannelCount,
+					1,
+					dspSettings.pMatrixCoefficients,
+					0
+				);
+			}
+		}
+
+		private const float MAX_FILTER_FREQUENCY = 1f;
+		private const float MAX_FILTER_ONEOVERQ = 1.5f;
+
+		private FAudio.FAudioFilterParameters filterParameters = new FAudio.FAudioFilterParameters
+		{
+			Type = FAudio.FAudioFilterType.FAudioLowPassFilter,
+			Frequency = 1f,
+			OneOverQ = 1f
+		};
+
+		private float FilterFrequency
+		{
+			get => filterParameters.Frequency;
+			set
+			{
+				value = System.Math.Clamp(value, 0.01f, MAX_FILTER_FREQUENCY);
+				filterParameters.Frequency = value;
+
+				FAudio.FAudioVoice_SetFilterParameters(
+					Handle,
+					ref filterParameters,
+					0
+				);
+			}
+		}
+
+		private float FilterOneOverQ
+		{
+			get => filterParameters.OneOverQ;
+			set
+			{
+				value = System.Math.Clamp(value, 0.01f, MAX_FILTER_ONEOVERQ);
+				filterParameters.OneOverQ = value;
+
+				FAudio.FAudioVoice_SetFilterParameters(
+					Handle,
+					ref filterParameters,
+					0
+				);
+			}
+		}
+
+		private FilterType filterType;
+		public FilterType FilterType
+		{
+			get => filterType;
+			set
+			{
+				filterType = value;
+
+				switch (filterType)
+				{
+					case FilterType.None:
+						filterParameters = new FAudio.FAudioFilterParameters
+						{
+							Type = FAudio.FAudioFilterType.FAudioLowPassFilter,
+							Frequency = 1f,
+							OneOverQ = 1f
+						};
+						break;
+
+					case FilterType.LowPass:
+						filterParameters.Type = FAudio.FAudioFilterType.FAudioLowPassFilter;
+						break;
+
+					case FilterType.BandPass:
+						filterParameters.Type = FAudio.FAudioFilterType.FAudioBandPassFilter;
+						break;
+
+					case FilterType.HighPass:
+						filterParameters.Type = FAudio.FAudioFilterType.FAudioHighPassFilter;
+						break;
+				}
+
+				FAudio.FAudioVoice_SetFilterParameters(
+					Handle,
+					ref filterParameters,
+					0
+				);
+			}
+		}
+
+		public SoundInstance(
+			AudioDevice device,
+			ushort formatTag,
+			ushort bitsPerSample,
+			ushort blockAlign,
+			ushort channels,
+			uint samplesPerSecond
+		) : base(device)
+		{
+			var format = new FAudio.FAudioWaveFormatEx
+			{
+				wFormatTag = formatTag,
+				wBitsPerSample = bitsPerSample,
+				nChannels = channels,
+				nBlockAlign = blockAlign,
+				nSamplesPerSec = samplesPerSecond,
+				nAvgBytesPerSec = blockAlign * samplesPerSecond
+			};
+
+			Format = format;
+
+			FAudio.FAudio_CreateSourceVoice(
+				Device.Handle,
+				out Handle,
+				ref Format,
+				FAudio.FAUDIO_VOICE_USEFILTER,
+				FAudio.FAUDIO_DEFAULT_FREQ_RATIO,
+				IntPtr.Zero,
+				IntPtr.Zero,
+				IntPtr.Zero
+			);
+
+			if (Handle == IntPtr.Zero)
+			{
+				Logger.LogError("SoundInstance failed to initialize!");
+				return;
+			}
+
+			InitDSPSettings(Format.nChannels);
+
+			// FIXME: not everything should be running through reverb...
+			/*
+			FAudio.FAudioVoice_SetOutputVoices(
+				Handle,
+				ref Device.ReverbSends
+			);
+			*/
+
+			State = SoundState.Stopped;
+		}
+
+		public void Apply3D(AudioListener listener, AudioEmitter emitter)
+		{
+			Is3D = true;
+
+			emitter.emitterData.CurveDistanceScaler = Device.CurveDistanceScalar;
+			emitter.emitterData.ChannelCount = dspSettings.SrcChannelCount;
+
+			FAudio.F3DAudioCalculate(
+				Device.Handle3D,
+				ref listener.listenerData,
+				ref emitter.emitterData,
+				FAudio.F3DAUDIO_CALCULATE_MATRIX | FAudio.F3DAUDIO_CALCULATE_DOPPLER,
+				ref dspSettings
+			);
+
+			UpdatePitch();
+			FAudio.FAudioVoice_SetOutputMatrix(
+				Handle,
+				Device.MasteringVoice,
+				dspSettings.SrcChannelCount,
+				dspSettings.DstChannelCount,
+				dspSettings.pMatrixCoefficients,
+				0
+			);
+		}
+
+		public abstract void Play();
+		public abstract void Pause();
+		public abstract void Stop();
+		public abstract void StopImmediate();
+
+		private void InitDSPSettings(uint srcChannels)
+		{
+			dspSettings = new FAudio.F3DAUDIO_DSP_SETTINGS();
+			dspSettings.DopplerFactor = 1f;
+			dspSettings.SrcChannelCount = srcChannels;
+			dspSettings.DstChannelCount = Device.DeviceDetails.OutputFormat.Format.nChannels;
+
+			int memsize = (
+				4 *
+				(int) dspSettings.SrcChannelCount *
+				(int) dspSettings.DstChannelCount
+			);
+
+			dspSettings.pMatrixCoefficients = Marshal.AllocHGlobal(memsize);
+			unsafe
+			{
+				byte* memPtr = (byte*) dspSettings.pMatrixCoefficients;
+				for (int i = 0; i < memsize; i += 1)
+				{
+					memPtr[i] = 0;
+				}
+			}
+			SetPanMatrixCoefficients();
+		}
+
+		private void UpdatePitch()
+		{
+			float doppler;
+			float dopplerScale = Device.DopplerScale;
+			if (!Is3D || dopplerScale == 0.0f)
+			{
+				doppler = 1.0f;
+			}
+			else
+			{
+				doppler = dspSettings.DopplerFactor * dopplerScale;
+			}
+
+			FAudio.FAudioSourceVoice_SetFrequencyRatio(
+				Handle,
+				(float) System.Math.Pow(2.0, pitch) * doppler,
+				0
+			);
+		}
+
+		// Taken from https://github.com/FNA-XNA/FNA/blob/master/src/Audio/SoundEffectInstance.cs
+		private unsafe void SetPanMatrixCoefficients()
+		{
+			/* Two major things to notice:
+			 * 1. The spec assumes any speaker count >= 2 has Front Left/Right.
+			 * 2. Stereo panning is WAY more complicated than you think.
+			 *    The main thing is that hard panning does NOT eliminate an
+			 *    entire channel; the two channels are blended on each side.
+			 * -flibit
+			 */
+			float* outputMatrix = (float*) dspSettings.pMatrixCoefficients;
+			if (dspSettings.SrcChannelCount == 1)
+			{
+				if (dspSettings.DstChannelCount == 1)
+				{
+					outputMatrix[0] = 1.0f;
+				}
+				else
+				{
+					outputMatrix[0] = (pan > 0.0f) ? (1.0f - pan) : 1.0f;
+					outputMatrix[1] = (pan < 0.0f) ? (1.0f + pan) : 1.0f;
+				}
+			}
+			else
+			{
+				if (dspSettings.DstChannelCount == 1)
+				{
+					outputMatrix[0] = 1.0f;
+					outputMatrix[1] = 1.0f;
+				}
+				else
+				{
+					if (pan <= 0.0f)
+					{
+						// Left speaker blends left/right channels
+						outputMatrix[0] = 0.5f * pan + 1.0f;
+						outputMatrix[1] = 0.5f * -pan;
+						// Right speaker gets less of the right channel
+						outputMatrix[2] = 0.0f;
+						outputMatrix[3] = pan + 1.0f;
+					}
+					else
+					{
+						// Left speaker gets less of the left channel
+						outputMatrix[0] = -pan + 1.0f;
+						outputMatrix[1] = 0.0f;
+						// Right speaker blends right/left channels
+						outputMatrix[2] = 0.5f * pan;
+						outputMatrix[3] = 0.5f * -pan + 1.0f;
+					}
+				}
+			}
+		}
+
+		protected override void Destroy()
+		{
+			StopImmediate();
+			FAudio.FAudioVoice_DestroyVoice(Handle);
+			Marshal.FreeHGlobal(dspSettings.pMatrixCoefficients);
+		}
+	}
+}

src/Audio/SoundSequence.cs

@@ -1,64 +0,0 @@
-namespace MoonWorks.Audio
-{
-	/// <summary>
-	/// Plays back a series of AudioBuffers in sequence. Set the OnSoundNeeded callback to add AudioBuffers dynamically.
-	/// </summary>
-	public class SoundSequence : UpdatingSourceVoice, IPoolable<SoundSequence>
-	{
-		public int NeedSoundThreshold = 0;
-		public delegate void OnSoundNeededFunc();
-		public OnSoundNeededFunc OnSoundNeeded;
-
-		public SoundSequence(AudioDevice device, Format format) : base(device, format)
-		{
-
-		}
-
-		public SoundSequence(AudioDevice device, AudioBuffer templateSound) : base(device, templateSound.Format)
-		{
-
-		}
-
-		public static SoundSequence Create(AudioDevice device, Format format)
-		{
-			return new SoundSequence(device, format);
-		}
-
-		public override void Update()
-		{
-			lock (StateLock)
-			{
-				if (State != SoundState.Playing) { return; }
-
-				if (NeedSoundThreshold > 0)
-				{
-					var buffersNeeded = NeedSoundThreshold - (int) BuffersQueued;
-
-					for (int i = 0; i < buffersNeeded; i += 1)
-					{
-						if (OnSoundNeeded != null)
-						{
-							OnSoundNeeded();
-						}
-					}
-				}
-			}
-		}
-
-		public void EnqueueSound(AudioBuffer buffer)
-		{
-#if DEBUG
-			if (!(buffer.Format == Format))
-			{
-				Logger.LogWarn("Sound sequence audio format mismatch!");
-				return;
-			}
-#endif
-
-			lock (StateLock)
-			{
-				Submit(buffer.ToFAudioBuffer());
-			}
-		}
-	}
-}

src/Audio/SourceVoice.cs

@@ -1,218 +0,0 @@
-using System;
-
-namespace MoonWorks.Audio
-{
-	/// <summary>
-	/// Emits audio from submitted audio buffers.
-	/// </summary>
-	public abstract class SourceVoice : Voice
-	{
-		private Format format;
-		public Format Format => format;
-
-		protected bool PlaybackInitiated;
-
-		/// <summary>
-		/// The number of buffers queued in the voice.
-		/// This includes the currently playing voice!
-		/// </summary>
-		public uint BuffersQueued
-		{
-			get
-			{
-				FAudio.FAudioSourceVoice_GetState(
-					Handle,
-					out var state,
-					FAudio.FAUDIO_VOICE_NOSAMPLESPLAYED
-				);
-
-				return state.BuffersQueued;
-			}
-		}
-
-		private SoundState state = SoundState.Stopped;
-		public SoundState State
-		{
-			get
-			{
-				if (BuffersQueued == 0)
-				{
-					Stop();
-				}
-
-				return state;
-			}
-
-			internal set
-			{
-				state = value;
-			}
-		}
-
-		protected object StateLock = new object();
-
-		public SourceVoice(
-			AudioDevice device,
-			Format format
-		) : base(device, format.Channels, device.DeviceDetails.OutputFormat.Format.nChannels)
-		{
-			this.format = format;
-			var fAudioFormat = format.ToFAudioFormat();
-
-			 FAudio.FAudio_CreateSourceVoice(
-				device.Handle,
-				out handle,
-				ref fAudioFormat,
-				FAudio.FAUDIO_VOICE_USEFILTER,
-				FAudio.FAUDIO_DEFAULT_FREQ_RATIO,
-				IntPtr.Zero,
-				IntPtr.Zero, // default sends to mastering voice!
-				IntPtr.Zero
-			);
-
-			SetOutputVoice(device.MasteringVoice);
-		}
-
-		/// <summary>
-		/// Starts consumption and processing of audio by the voice.
-		/// Delivers the result to any connected submix or mastering voice.
-		/// </summary>
-		/// <param name="syncGroup">Optional. Denotes that the operation will be pending until AudioDevice.TriggerSyncGroup is called.</param>
-		public void Play(uint syncGroup = FAudio.FAUDIO_COMMIT_NOW)
-		{
-			lock (StateLock)
-			{
-				FAudio.FAudioSourceVoice_Start(Handle, 0, syncGroup);
-
-				State = SoundState.Playing;
-			}
-		}
-
-		/// <summary>
-		/// Pauses playback.
-		/// All source buffers that are queued on the voice and the current cursor position are preserved.
-		/// </summary>
-		/// <param name="syncGroup">Optional. Denotes that the operation will be pending until AudioDevice.TriggerSyncGroup is called.</param>
-		public void Pause(uint syncGroup = FAudio.FAUDIO_COMMIT_NOW)
-		{
-			lock (StateLock)
-			{
-				FAudio.FAudioSourceVoice_Stop(Handle, 0, syncGroup);
-
-				State = SoundState.Paused;
-			}
-		}
-
-		/// <summary>
-		/// Stops looping the voice when it reaches the end of the current loop region.
-		/// If the cursor for the voice is not in a loop region, ExitLoop does nothing.
-		/// </summary>
-		/// <param name="syncGroup">Optional. Denotes that the operation will be pending until AudioDevice.TriggerSyncGroup is called.</param>
-		public void ExitLoop(uint syncGroup = FAudio.FAUDIO_COMMIT_NOW)
-		{
-			lock (StateLock)
-			{
-				FAudio.FAudioSourceVoice_ExitLoop(Handle, syncGroup);
-			}
-		}
-
-		/// <summary>
-		/// Stops playback and removes all pending audio buffers from the voice queue.
-		/// </summary>
-		/// <param name="syncGroup">Optional. Denotes that the operation will be pending until AudioDevice.TriggerSyncGroup is called.</param>
-		public void Stop(uint syncGroup = FAudio.FAUDIO_COMMIT_NOW)
-		{
-			lock (StateLock)
-			{
-				FAudio.FAudioSourceVoice_Stop(Handle, 0, syncGroup);
-				FAudio.FAudioSourceVoice_FlushSourceBuffers(Handle);
-
-				State = SoundState.Stopped;
-			}
-		}
-
-		/// <summary>
-		/// Adds an AudioBuffer to the voice queue.
-		/// The voice processes and plays back the buffers in its queue in the order that they were submitted.
-		/// </summary>
-		/// <param name="buffer">The buffer to submit to the voice.</param>
-		public void Submit(AudioBuffer buffer)
-		{
-			Submit(buffer.ToFAudioBuffer());
-		}
-
-		/// <summary>
-		/// Calculates positional sound. This must be called continuously to update positional sound.
-		/// </summary>
-		/// <param name="listener"></param>
-		/// <param name="emitter"></param>
-		public unsafe void Apply3D(AudioListener listener, AudioEmitter emitter)
-		{
-			Is3D = true;
-
-			emitter.emitterData.CurveDistanceScaler = Device.CurveDistanceScalar;
-			emitter.emitterData.ChannelCount = SourceChannelCount;
-
-			var dspSettings = new FAudio.F3DAUDIO_DSP_SETTINGS
-			{
-				DopplerFactor = DopplerFactor,
-				SrcChannelCount = SourceChannelCount,
-				DstChannelCount = DestinationChannelCount,
-				pMatrixCoefficients = (nint) pMatrixCoefficients
-			};
-
-			FAudio.F3DAudioCalculate(
-				Device.Handle3D,
-				ref listener.listenerData,
-				ref emitter.emitterData,
-				FAudio.F3DAUDIO_CALCULATE_MATRIX | FAudio.F3DAUDIO_CALCULATE_DOPPLER,
-				ref dspSettings
-			);
-
-			UpdatePitch();
-
-			FAudio.FAudioVoice_SetOutputMatrix(
-				Handle,
-				OutputVoice.Handle,
-				SourceChannelCount,
-				DestinationChannelCount,
-				(nint) pMatrixCoefficients,
-				0
-			);
-		}
-
-		/// <summary>
-		/// Specifies that this source voice can be returned to the voice pool.
-		/// Holding on to the reference after calling this will cause problems!
-		/// </summary>
-		public void Return()
-		{
-			Stop();
-			Device.Return(this);
-		}
-
-		/// <summary>
-		/// Adds an FAudio buffer to the voice queue.
-		/// The voice processes and plays back the buffers in its queue in the order that they were submitted.
-		/// </summary>
-		/// <param name="buffer">The buffer to submit to the voice.</param>
-		protected void Submit(FAudio.FAudioBuffer buffer)
-		{
-			lock (StateLock)
-			{
-				FAudio.FAudioSourceVoice_SubmitSourceBuffer(
-					Handle,
-					ref buffer,
-					IntPtr.Zero
-				);
-			}
-		}
-
-		public override void Reset()
-		{
-			Stop();
-			PlaybackInitiated = false;
-			base.Reset();
-		}
-	}
-}

src/Audio/SourceVoicePool.cs

@@ -1,39 +0,0 @@
-using System.Collections.Generic;
-
-namespace MoonWorks.Audio
-{
-	internal class SourceVoicePool
-	{
-		private AudioDevice Device;
-
-		Dictionary<(System.Type, Format), Queue<SourceVoice>> VoiceLists = new Dictionary<(System.Type, Format), Queue<SourceVoice>>();
-
-		public SourceVoicePool(AudioDevice device)
-		{
-			Device = device;
-		}
-
-		public T Obtain<T>(Format format) where T : SourceVoice, IPoolable<T>
-		{
-			if (!VoiceLists.ContainsKey((typeof(T), format)))
-			{
-				VoiceLists.Add((typeof(T), format), new Queue<SourceVoice>());
-			}
-
-			var list = VoiceLists[(typeof(T), format)];
-
-			if (list.Count == 0)
-			{
-				list.Enqueue(T.Create(Device, format));
-			}
-
-			return (T) list.Dequeue();
-		}
-
-		public void Return(SourceVoice voice)
-		{
-			var list = VoiceLists[(voice.GetType(), voice.Format)];
-			list.Enqueue(voice);
-		}
-	}
-}

src/Audio/StaticSound.cs

@@ -0,0 +1,295 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Runtime.InteropServices;
+
+namespace MoonWorks.Audio
+{
+	public class StaticSound : AudioResource
+	{
+		internal FAudio.FAudioBuffer Handle;
+		public ushort FormatTag { get; }
+		public ushort BitsPerSample { get; }
+		public ushort Channels { get; }
+		public uint SamplesPerSecond { get; }
+		public ushort BlockAlign { get; }
+
+		public uint LoopStart { get; set; } = 0;
+		public uint LoopLength { get; set; } = 0;
+
+		private Stack<StaticSoundInstance> Instances = new Stack<StaticSoundInstance>();
+
+		public static StaticSound LoadOgg(AudioDevice device, string filePath)
+		{
+			var filePointer = FAudio.stb_vorbis_open_filename(filePath, out var error, IntPtr.Zero);
+
+			if (error != 0)
+			{
+				throw new AudioLoadException("Error loading file!");
+			}
+			var info = FAudio.stb_vorbis_get_info(filePointer);
+			var bufferSize = FAudio.stb_vorbis_stream_length_in_samples(filePointer) * info.channels;
+			var buffer = new float[bufferSize];
+
+			FAudio.stb_vorbis_get_samples_float_interleaved(
+				filePointer,
+				info.channels,
+				buffer,
+				(int) bufferSize
+			);
+
+			FAudio.stb_vorbis_close(filePointer);
+
+			return new StaticSound(
+				device,
+				(ushort) info.channels,
+				info.sample_rate,
+				buffer,
+				0,
+				(uint) buffer.Length
+			);
+		}
+
+		// mostly borrowed from https://github.com/FNA-XNA/FNA/blob/b71b4a35ae59970ff0070dea6f8620856d8d4fec/src/Audio/SoundEffect.cs#L385
+		public static StaticSound LoadWav(AudioDevice device, string filePath)
+		{
+			// Sample data
+			byte[] data;
+
+			// WaveFormatEx data
+			ushort wFormatTag;
+			ushort nChannels;
+			uint nSamplesPerSec;
+			uint nAvgBytesPerSec;
+			ushort nBlockAlign;
+			ushort wBitsPerSample;
+			int samplerLoopStart = 0;
+			int samplerLoopEnd = 0;
+
+			using (BinaryReader reader = new BinaryReader(File.OpenRead(filePath)))
+			{
+				// RIFF Signature
+				string signature = new string(reader.ReadChars(4));
+				if (signature != "RIFF")
+				{
+					throw new NotSupportedException("Specified stream is not a wave file.");
+				}
+
+				reader.ReadUInt32(); // Riff Chunk Size
+
+				string wformat = new string(reader.ReadChars(4));
+				if (wformat != "WAVE")
+				{
+					throw new NotSupportedException("Specified stream is not a wave file.");
+				}
+
+				// WAVE Header
+				string format_signature = new string(reader.ReadChars(4));
+				while (format_signature != "fmt ")
+				{
+					reader.ReadBytes(reader.ReadInt32());
+					format_signature = new string(reader.ReadChars(4));
+				}
+
+				int format_chunk_size = reader.ReadInt32();
+
+				wFormatTag = reader.ReadUInt16();
+				nChannels = reader.ReadUInt16();
+				nSamplesPerSec = reader.ReadUInt32();
+				nAvgBytesPerSec = reader.ReadUInt32();
+				nBlockAlign = reader.ReadUInt16();
+				wBitsPerSample = reader.ReadUInt16();
+
+				// Reads residual bytes
+				if (format_chunk_size > 16)
+				{
+					reader.ReadBytes(format_chunk_size - 16);
+				}
+
+				// data Signature
+				string data_signature = new string(reader.ReadChars(4));
+				while (data_signature.ToLowerInvariant() != "data")
+				{
+					reader.ReadBytes(reader.ReadInt32());
+					data_signature = new string(reader.ReadChars(4));
+				}
+				if (data_signature != "data")
+				{
+					throw new NotSupportedException("Specified wave file is not supported.");
+				}
+
+				int waveDataLength = reader.ReadInt32();
+				data = reader.ReadBytes(waveDataLength);
+
+				// Scan for other chunks
+				while (reader.PeekChar() != -1)
+				{
+					char[] chunkIDChars = reader.ReadChars(4);
+					if (chunkIDChars.Length < 4)
+					{
+						break; // EOL!
+					}
+					byte[] chunkSizeBytes = reader.ReadBytes(4);
+					if (chunkSizeBytes.Length < 4)
+					{
+						break; // EOL!
+					}
+					string chunk_signature = new string(chunkIDChars);
+					int chunkDataSize = BitConverter.ToInt32(chunkSizeBytes, 0);
+					if (chunk_signature == "smpl") // "smpl", Sampler Chunk Found
+					{
+						reader.ReadUInt32(); // Manufacturer
+						reader.ReadUInt32(); // Product
+						reader.ReadUInt32(); // Sample Period
+						reader.ReadUInt32(); // MIDI Unity Note
+						reader.ReadUInt32(); // MIDI Pitch Fraction
+						reader.ReadUInt32(); // SMPTE Format
+						reader.ReadUInt32(); // SMPTE Offset
+						uint numSampleLoops = reader.ReadUInt32();
+						int samplerData = reader.ReadInt32();
+
+						for (int i = 0; i < numSampleLoops; i += 1)
+						{
+							reader.ReadUInt32(); // Cue Point ID
+							reader.ReadUInt32(); // Type
+							int start = reader.ReadInt32();
+							int end = reader.ReadInt32();
+							reader.ReadUInt32(); // Fraction
+							reader.ReadUInt32(); // Play Count
+
+							if (i == 0) // Grab loopStart and loopEnd from first sample loop
+							{
+								samplerLoopStart = start;
+								samplerLoopEnd = end;
+							}
+						}
+
+						if (samplerData != 0) // Read Sampler Data if it exists
+						{
+							reader.ReadBytes(samplerData);
+						}
+					}
+					else // Read unwanted chunk data and try again
+					{
+						reader.ReadBytes(chunkDataSize);
+					}
+				}
+				// End scan
+			}
+
+			return new StaticSound(
+				device,
+				wFormatTag,
+				wBitsPerSample,
+				nBlockAlign,
+				nChannels,
+				nSamplesPerSec,
+				data,
+				0,
+				(uint) data.Length
+			);
+		}
+
+		public StaticSound(
+			AudioDevice device,
+			ushort formatTag,
+			ushort bitsPerSample,
+			ushort blockAlign,
+			ushort channels,
+			uint samplesPerSecond,
+			byte[] buffer,
+			uint bufferOffset, /* number of bytes */
+			uint bufferLength /* number of bytes */
+		) : base(device)
+		{
+			FormatTag = formatTag;
+			BitsPerSample = bitsPerSample;
+			BlockAlign = blockAlign;
+			Channels = channels;
+			SamplesPerSecond = samplesPerSecond;
+
+			Handle = new FAudio.FAudioBuffer();
+			Handle.Flags = FAudio.FAUDIO_END_OF_STREAM;
+			Handle.pContext = IntPtr.Zero;
+			Handle.AudioBytes = bufferLength;
+			Handle.pAudioData = Marshal.AllocHGlobal((int) bufferLength);
+			Marshal.Copy(buffer, (int) bufferOffset, Handle.pAudioData, (int) bufferLength);
+			Handle.PlayBegin = 0;
+			Handle.PlayLength = 0;
+
+			if (formatTag == 1)
+			{
+				Handle.PlayLength = (uint) (
+					bufferLength /
+					channels /
+					(bitsPerSample / 8)
+				);
+			}
+			else if (formatTag == 2)
+			{
+				Handle.PlayLength = (uint) (
+					bufferLength /
+					blockAlign *
+					(((blockAlign / channels) - 6) * 2)
+				);
+			}
+
+			LoopStart = 0;
+			LoopLength = 0;
+		}
+
+		public StaticSound(
+			AudioDevice device,
+			ushort channels,
+			uint samplesPerSecond,
+			float[] buffer,
+			uint bufferOffset, /* in floats */
+			uint bufferLength  /* in floats */
+		) : base(device)
+		{
+			FormatTag = 3;
+			BitsPerSample = 32;
+			BlockAlign = (ushort) (4 * channels);
+			Channels = channels;
+			SamplesPerSecond = samplesPerSecond;
+
+			var bufferLengthInBytes = (int) (bufferLength * sizeof(float));
+			Handle = new FAudio.FAudioBuffer();
+			Handle.Flags = FAudio.FAUDIO_END_OF_STREAM;
+			Handle.pContext = IntPtr.Zero;
+			Handle.AudioBytes = (uint) bufferLengthInBytes;
+			Handle.pAudioData = Marshal.AllocHGlobal(bufferLengthInBytes);
+			Marshal.Copy(buffer, (int) bufferOffset, Handle.pAudioData, (int) bufferLength);
+			Handle.PlayBegin = 0;
+			Handle.PlayLength = 0;
+
+			LoopStart = 0;
+			LoopLength = 0;
+		}
+
+		/// <summary>
+		/// Gets a sound instance from the pool.
+		/// NOTE: If you lose track of instances, you will create garbage collection pressure!
+		/// </summary>
+		public StaticSoundInstance GetInstance()
+		{
+			if (Instances.Count == 0)
+			{
+				Instances.Push(new StaticSoundInstance(Device, this));
+			}
+
+			return Instances.Pop();
+		}
+
+		internal void FreeInstance(StaticSoundInstance instance)
+		{
+			instance.Reset();
+			Instances.Push(instance);
+		}
+
+		protected override void Destroy()
+		{
+			Marshal.FreeHGlobal(Handle.pAudioData);
+		}
+	}
+}

src/Audio/StaticSoundInstance.cs

@@ -0,0 +1,123 @@
+using System;
+
+namespace MoonWorks.Audio
+{
+	public class StaticSoundInstance : SoundInstance
+	{
+		public StaticSound Parent { get; }
+
+		public bool Loop { get; set; }
+
+		private SoundState _state = SoundState.Stopped;
+		public override SoundState State
+		{
+			get
+			{
+				FAudio.FAudioSourceVoice_GetState(
+					Handle,
+					out var state,
+					FAudio.FAUDIO_VOICE_NOSAMPLESPLAYED
+				);
+				if (state.BuffersQueued == 0)
+				{
+					StopImmediate();
+				}
+
+				return _state;
+			}
+
+			protected set
+			{
+				_state = value;
+			}
+		}
+
+		internal StaticSoundInstance(
+			AudioDevice device,
+			StaticSound parent
+		) : base(device, parent.FormatTag, parent.BitsPerSample, parent.BlockAlign, parent.Channels, parent.SamplesPerSecond)
+		{
+			Parent = parent;
+		}
+
+		public override void Play()
+		{
+			if (State == SoundState.Playing)
+			{
+				return;
+			}
+
+			if (Loop)
+			{
+				Parent.Handle.LoopCount = 255;
+				Parent.Handle.LoopBegin = Parent.LoopStart;
+				Parent.Handle.LoopLength = Parent.LoopLength;
+			}
+			else
+			{
+				Parent.Handle.LoopCount = 0;
+				Parent.Handle.LoopBegin = 0;
+				Parent.Handle.LoopLength = 0;
+			}
+
+			FAudio.FAudioSourceVoice_SubmitSourceBuffer(
+				Handle,
+				ref Parent.Handle,
+				IntPtr.Zero
+			);
+
+			FAudio.FAudioSourceVoice_Start(Handle, 0, 0);
+			State = SoundState.Playing;
+		}
+
+		public override void Pause()
+		{
+			if (State == SoundState.Paused)
+			{
+				FAudio.FAudioSourceVoice_Stop(Handle, 0, 0);
+				State = SoundState.Paused;
+			}
+		}
+
+		public override void Stop()
+		{
+			FAudio.FAudioSourceVoice_ExitLoop(Handle, 0);
+			State = SoundState.Stopped;
+		}
+
+		public override void StopImmediate()
+		{
+			FAudio.FAudioSourceVoice_Stop(Handle, 0, 0);
+			FAudio.FAudioSourceVoice_FlushSourceBuffers(Handle);
+			State = SoundState.Stopped;
+		}
+
+		public void Seek(uint sampleFrame)
+		{
+			if (State == SoundState.Playing)
+			{
+				FAudio.FAudioSourceVoice_Stop(Handle, 0, 0);
+				FAudio.FAudioSourceVoice_FlushSourceBuffers(Handle);
+			}
+
+			Parent.Handle.PlayBegin = sampleFrame;
+		}
+
+		public void Free()
+		{
+			Parent.FreeInstance(this);
+		}
+
+		internal void Reset()
+		{
+			Pan = 0;
+			Pitch = 0;
+			Volume = 1;
+			Reverb = 0;
+			Loop = false;
+			Is3D = false;
+			FilterType = FilterType.None;
+			Reverb = 0;
+		}
+	}
+}

src/Audio/StreamingSound.cs

@@ -0,0 +1,165 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace MoonWorks.Audio
+{
+	/// <summary>
+	/// For streaming long playback.
+	/// Must be extended with a decoder routine called by FillBuffer.
+	/// See StreamingSoundOgg for an example.
+	/// </summary>
+	public abstract class StreamingSound : SoundInstance
+	{
+		private const int BUFFER_COUNT = 3;
+		private readonly IntPtr[] buffers;
+		private int nextBufferIndex = 0;
+		private uint queuedBufferCount = 0;
+		protected abstract int BUFFER_SIZE { get; }
+
+		public unsafe StreamingSound(
+			AudioDevice device,
+			ushort formatTag,
+			ushort bitsPerSample,
+			ushort blockAlign,
+			ushort channels,
+			uint samplesPerSecond
+		) : base(device, formatTag, bitsPerSample, blockAlign, channels, samplesPerSecond)
+		{
+			device.AddDynamicSoundInstance(this);
+
+			buffers = new IntPtr[BUFFER_COUNT];
+			for (int i = 0; i < BUFFER_COUNT; i += 1)
+			{
+				buffers[i] = (IntPtr) NativeMemory.Alloc((nuint) BUFFER_SIZE);
+			}
+		}
+
+		public override void Play()
+		{
+			if (State == SoundState.Playing)
+			{
+				return;
+			}
+
+			State = SoundState.Playing;
+
+			Update();
+			FAudio.FAudioSourceVoice_Start(Handle, 0, 0);
+		}
+
+		public override void Pause()
+		{
+			if (State == SoundState.Playing)
+			{
+				FAudio.FAudioSourceVoice_Stop(Handle, 0, 0);
+				State = SoundState.Paused;
+			}
+		}
+
+		public override void Stop()
+		{
+			State = SoundState.Stopped;
+		}
+
+		public override void StopImmediate()
+		{
+			FAudio.FAudioSourceVoice_Stop(Handle, 0, 0);
+			FAudio.FAudioSourceVoice_FlushSourceBuffers(Handle);
+			ClearBuffers();
+
+			State = SoundState.Stopped;
+		}
+
+		internal unsafe void Update()
+		{
+			if (State != SoundState.Playing)
+			{
+				return;
+			}
+
+			FAudio.FAudioSourceVoice_GetState(
+				Handle,
+				out var state,
+				FAudio.FAUDIO_VOICE_NOSAMPLESPLAYED
+			);
+
+			queuedBufferCount = state.BuffersQueued;
+
+			QueueBuffers();
+		}
+
+		protected void QueueBuffers()
+		{
+			for (int i = 0; i < BUFFER_COUNT - queuedBufferCount; i += 1)
+			{
+				AddBuffer();
+			}
+		}
+
+		protected unsafe void ClearBuffers()
+		{
+			nextBufferIndex = 0;
+			queuedBufferCount = 0;
+		}
+
+		protected unsafe void AddBuffer()
+		{
+			var buffer = buffers[nextBufferIndex];
+			nextBufferIndex = (nextBufferIndex + 1) % BUFFER_COUNT;
+
+			FillBuffer(
+				(void*) buffer,
+				BUFFER_SIZE,
+				out int filledLengthInBytes,
+				out bool reachedEnd
+			);
+
+			FAudio.FAudioBuffer buf = new FAudio.FAudioBuffer
+			{
+				AudioBytes = (uint) filledLengthInBytes,
+				pAudioData = (IntPtr) buffer,
+				PlayLength = (
+					(uint) (filledLengthInBytes /
+					Format.nChannels /
+					(uint) (Format.wBitsPerSample / 8))
+				)
+			};
+
+			FAudio.FAudioSourceVoice_SubmitSourceBuffer(
+				Handle,
+				ref buf,
+				IntPtr.Zero
+			);
+
+			queuedBufferCount += 1;
+
+			/* We have reached the end of the file, what do we do? */
+			if (reachedEnd)
+			{
+				OnReachedEnd();
+			}
+		}
+
+		protected virtual void OnReachedEnd()
+		{
+			Stop();
+		}
+
+		protected unsafe abstract void FillBuffer(
+			void* buffer,
+			int bufferLengthInBytes, /* in bytes */
+			out int filledLengthInBytes, /* in bytes */
+			out bool reachedEnd
+		);
+
+		protected unsafe override void Destroy()
+		{
+			StopImmediate();
+
+			for (int i = 0; i < BUFFER_COUNT; i += 1)
+			{
+				NativeMemory.Free((void*) buffers[i]);
+			}
+		}
+	}
+}

src/Audio/StreamingSoundOgg.cs

@@ -0,0 +1,90 @@
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+
+namespace MoonWorks.Audio
+{
+	public class StreamingSoundOgg : StreamingSoundSeekable
+	{
+		private IntPtr VorbisHandle;
+		private IntPtr FileDataPtr;
+		private FAudio.stb_vorbis_info Info;
+
+		protected override int BUFFER_SIZE => 32768;
+
+		public unsafe static StreamingSoundOgg Load(AudioDevice device, string filePath)
+		{
+			var fileData = File.ReadAllBytes(filePath);
+			var fileDataPtr = NativeMemory.Alloc((nuint) fileData.Length);
+			Marshal.Copy(fileData, 0, (IntPtr) fileDataPtr, fileData.Length);
+			var vorbisHandle = FAudio.stb_vorbis_open_memory((IntPtr) fileDataPtr, fileData.Length, out int error, IntPtr.Zero);
+			if (error != 0)
+			{
+				NativeMemory.Free(fileDataPtr);
+				Logger.LogError("Error opening OGG file!");
+				Logger.LogError("Error: " + error);
+				throw new AudioLoadException("Error opening OGG file!");
+			}
+			var info = FAudio.stb_vorbis_get_info(vorbisHandle);
+
+			return new StreamingSoundOgg(
+				device,
+				(IntPtr) fileDataPtr,
+				vorbisHandle,
+				info
+			);
+		}
+
+		internal StreamingSoundOgg(
+			AudioDevice device,
+			IntPtr fileDataPtr, // MUST BE A NATIVE MEMORY HANDLE!!
+			IntPtr vorbisHandle,
+			FAudio.stb_vorbis_info info
+		) : base(
+			device,
+			3, /* float type */
+			32, /* size of float */
+			(ushort) (4 * info.channels),
+			(ushort) info.channels,
+			info.sample_rate
+		)
+		{
+			FileDataPtr = fileDataPtr;
+			VorbisHandle = vorbisHandle;
+			Info = info;
+		}
+
+		public override void Seek(uint sampleFrame)
+		{
+			FAudio.stb_vorbis_seek(VorbisHandle, sampleFrame);
+		}
+
+		protected unsafe override void FillBuffer(
+			void* buffer,
+			int bufferLengthInBytes,
+			out int filledLengthInBytes,
+			out bool reachedEnd
+		)
+		{
+			var lengthInFloats = bufferLengthInBytes / sizeof(float);
+
+			/* NOTE: this function returns samples per channel, not total samples */
+			var samples = FAudio.stb_vorbis_get_samples_float_interleaved(
+				VorbisHandle,
+				Info.channels,
+				(IntPtr) buffer,
+				lengthInFloats
+			);
+
+			var sampleCount = samples * Info.channels;
+			reachedEnd = sampleCount < lengthInFloats;
+			filledLengthInBytes = sampleCount * sizeof(float);
+		}
+
+		protected unsafe override void Destroy()
+		{
+			FAudio.stb_vorbis_close(VorbisHandle);
+			NativeMemory.Free((void*) FileDataPtr);
+		}
+	}
+}

src/Audio/StreamingSoundSeekable.cs

@@ -0,0 +1,25 @@
+namespace MoonWorks.Audio
+{
+	public abstract class StreamingSoundSeekable : StreamingSound
+	{
+		public bool Loop { get; set; }
+
+		protected StreamingSoundSeekable(AudioDevice device, ushort formatTag, ushort bitsPerSample, ushort blockAlign, ushort channels, uint samplesPerSecond) : base(device, formatTag, bitsPerSample, blockAlign, channels, samplesPerSecond)
+		{
+		}
+
+		public abstract void Seek(uint sampleFrame);
+
+		protected override void OnReachedEnd()
+		{
+			if (Loop)
+			{
+				Seek(0);
+			}
+			else
+			{
+				Stop();
+			}
+		}
+	}
+}

src/Audio/StreamingVoice.cs

@@ -1,169 +0,0 @@
-using System;
-using System.Runtime.InteropServices;
-
-namespace MoonWorks.Audio
-{
-	/// <summary>
-	/// Use in conjunction with an AudioDataStreamable object to play back streaming audio data.
-	/// </summary>
-	public class StreamingVoice : UpdatingSourceVoice, IPoolable<StreamingVoice>
-	{
-		private const int BUFFER_COUNT = 3;
-		private readonly IntPtr[] buffers;
-		private int nextBufferIndex = 0;
-		private uint BufferSize;
-
-		public bool Loop { get; set; }
-
-		public AudioDataStreamable AudioData { get; protected set; }
-
-		public unsafe StreamingVoice(AudioDevice device, Format format) : base(device, format)
-		{
-			buffers = new IntPtr[BUFFER_COUNT];
-		}
-
-		public static StreamingVoice Create(AudioDevice device, Format format)
-		{
-			return new StreamingVoice(device, format);
-		}
-
-		/// <summary>
-		/// Loads and prepares an AudioDataStreamable for streaming playback.
-		/// This automatically calls Load on the given AudioDataStreamable.
-		/// </summary>
-		public void Load(AudioDataStreamable data)
-		{
-			lock (StateLock)
-			{
-				if (AudioData != null)
-				{
-					AudioData.Unload();
-				}
-
-				data.Load();
-				AudioData = data;
-
-				InitializeBuffers();
-				QueueBuffers();
-			}
-		}
-
-		/// <summary>
-		/// Unloads AudioDataStreamable from this voice.
-		/// This automatically calls Unload on the given AudioDataStreamable.
-		/// </summary>
-		public void Unload()
-		{
-			lock (StateLock)
-			{
-				if (AudioData != null)
-				{
-					Stop();
-					AudioData.Unload();
-					AudioData = null;
-				}
-			}
-		}
-
-		public override void Reset()
-		{
-			Unload();
-			base.Reset();
-		}
-
-		public override void Update()
-		{
-			lock (StateLock)
-			{
-				if (AudioData == null || State != SoundState.Playing)
-				{
-					return;
-				}
-
-				QueueBuffers();
-			}
-		}
-
-		private void QueueBuffers()
-		{
-			int buffersNeeded = BUFFER_COUNT - (int) BuffersQueued; // don't get got by uint underflow!
-			for (int i = 0; i < buffersNeeded; i += 1)
-			{
-				AddBuffer();
-			}
-		}
-
-		private unsafe void AddBuffer()
-		{
-			var buffer = buffers[nextBufferIndex];
-			nextBufferIndex = (nextBufferIndex + 1) % BUFFER_COUNT;
-
-			AudioData.Decode(
-				(void*) buffer,
-				(int) BufferSize,
-				out int filledLengthInBytes,
-				out bool reachedEnd
-			);
-
-			if (filledLengthInBytes > 0)
-			{
-				var buf = new FAudio.FAudioBuffer
-				{
-					AudioBytes = (uint) filledLengthInBytes,
-					pAudioData = buffer,
-					PlayLength = (
-						(uint) (filledLengthInBytes /
-						Format.Channels /
-						(uint) (Format.BitsPerSample / 8))
-					)
-				};
-
-				Submit(buf);
-			}
-
-			if (reachedEnd)
-			{
-				/* We have reached the end of the data, what do we do? */
-				if (Loop)
-				{
-					AudioData.Seek(0);
-				}
-			}
-		}
-
-		private unsafe void InitializeBuffers()
-		{
-			BufferSize = AudioData.DecodeBufferSize;
-
-			for (int i = 0; i < BUFFER_COUNT; i += 1)
-			{
-				if (buffers[i] != IntPtr.Zero)
-				{
-					NativeMemory.Free((void*) buffers[i]);
-				}
-
-				buffers[i] = (IntPtr) NativeMemory.Alloc(BufferSize);
-			}
-		}
-
-		protected override unsafe void Dispose(bool disposing)
-		{
-			if (!IsDisposed)
-			{
-				lock (StateLock)
-				{
-					Stop();
-
-					for (int i = 0; i < BUFFER_COUNT; i += 1)
-					{
-						if (buffers[i] != IntPtr.Zero)
-						{
-							NativeMemory.Free((void*) buffers[i]);
-						}
-					}
-				}
-			}
-			base.Dispose(disposing);
-		}
-	}
-}

src/Audio/SubmixVoice.cs

@@ -1,56 +0,0 @@
-using System;
-
-namespace MoonWorks.Audio
-{
-	/// <summary>
-	/// SourceVoices can send audio to a SubmixVoice for convenient effects processing.
-	/// Submixes process in order of processingStage, from lowest to highest.
-	/// Therefore submixes early in a chain should have a low processingStage, and later in the chain they should have a higher one.
-	/// </summary>
-	public class SubmixVoice : Voice
-	{
-		public SubmixVoice(
-			AudioDevice device,
-			uint sourceChannelCount,
-			uint sampleRate,
-			uint processingStage
-		) : base(device, sourceChannelCount, device.DeviceDetails.OutputFormat.Format.nChannels)
-		{
-			FAudio.FAudio_CreateSubmixVoice(
-				device.Handle,
-				out handle,
-				sourceChannelCount,
-				sampleRate,
-				FAudio.FAUDIO_VOICE_USEFILTER,
-				processingStage,
-				IntPtr.Zero,
-				IntPtr.Zero
-			);
-
-			SetOutputVoice(device.MasteringVoice);
-		}
-
-		private SubmixVoice(
-			AudioDevice device
-		) : base(device, device.DeviceDetails.OutputFormat.Format.nChannels, device.DeviceDetails.OutputFormat.Format.nChannels)
-		{
-			FAudio.FAudio_CreateSubmixVoice(
-				device.Handle,
-				out handle,
-				device.DeviceDetails.OutputFormat.Format.nChannels,
-				device.DeviceDetails.OutputFormat.Format.nSamplesPerSec,
-				FAudio.FAUDIO_VOICE_USEFILTER,
-				int.MaxValue,
-				IntPtr.Zero, // default sends to mastering voice
-				IntPtr.Zero
-			);
-
-			OutputVoice = null;
-		}
-
-		internal static SubmixVoice CreateFauxMasteringVoice(AudioDevice device)
-		{
-			return new SubmixVoice(device);
-		}
-	}
-}

src/Audio/TransientVoice.cs

@@ -1,29 +0,0 @@
-namespace MoonWorks.Audio
-{
-	/// <summary>
-	/// TransientVoice is intended for playing one-off sound effects that don't have a long term reference. <br/>
-	/// It will be automatically returned to the AudioDevice SourceVoice pool once it is done playing back.
-	/// </summary>
-	public class TransientVoice : UpdatingSourceVoice, IPoolable<TransientVoice>
-	{
-		static TransientVoice IPoolable<TransientVoice>.Create(AudioDevice device, Format format)
-		{
-			return new TransientVoice(device, format);
-		}
-
-		public TransientVoice(AudioDevice device, Format format) : base(device, format)
-		{
-		}
-
-		public override void Update()
-		{
-			lock (StateLock)
-			{
-				if (PlaybackInitiated && BuffersQueued == 0)
-				{
-					Return();
-				}
-			}
-		}
-	}
-}

src/Audio/UpdatingSourceVoice.cs

@@ -1,11 +0,0 @@
-namespace MoonWorks.Audio
-{
-	public abstract class UpdatingSourceVoice : SourceVoice
-	{
-		protected UpdatingSourceVoice(AudioDevice device, Format format) : base(device, format)
-		{
-		}
-
-		public abstract void Update();
-	}
-}

src/Audio/Voice.cs

@@ -1,578 +0,0 @@
-using System;
-using System.Runtime.InteropServices;
-using EasingFunction = System.Func<float, float>;
-
-namespace MoonWorks.Audio
-{
-	/// <summary>
-	/// Handles audio playback from audio buffer data. Can be configured with a variety of parameters.
-	/// </summary>
-	public abstract unsafe class Voice : AudioResource
-	{
-		protected IntPtr handle;
-		public IntPtr Handle => handle;
-
-		public uint SourceChannelCount { get; }
-		public uint DestinationChannelCount { get; }
-
-		protected SubmixVoice OutputVoice;
-		private ReverbEffect ReverbEffect;
-
-		protected byte* pMatrixCoefficients;
-
-		public bool Is3D { get; protected set; }
-
-		private float dopplerFactor;
-		/// <summary>
-		/// The strength of the doppler effect on this voice.
-		/// </summary>
-		public float DopplerFactor
-		{
-			get => dopplerFactor;
-			set
-			{
-				if (dopplerFactor != value)
-				{
-					dopplerFactor = value;
-					UpdatePitch();
-				}
-			}
-		}
-
-		private float volume = 1;
-		/// <summary>
-		/// The overall volume level for the voice.
-		/// </summary>
-		public float Volume
-		{
-			get => volume;
-			internal set
-			{
-				value = Math.MathHelper.Max(0, value);
-				if (volume != value)
-				{
-					volume = value;
-					FAudio.FAudioVoice_SetVolume(Handle, volume, 0);
-				}
-			}
-		}
-
-		private float pitch = 0;
-		/// <summary>
-		/// The pitch of the voice.
-		/// </summary>
-		public float Pitch
-		{
-			get => pitch;
-			internal set
-			{
-				value = Math.MathHelper.Clamp(value, -1f, 1f);
-				if (pitch != value)
-				{
-					pitch = value;
-					UpdatePitch();
-				}
-			}
-		}
-
-		private const float MAX_FILTER_FREQUENCY = 1f;
-		private const float MAX_FILTER_ONEOVERQ = 1.5f;
-
-		private FAudio.FAudioFilterParameters filterParameters = new FAudio.FAudioFilterParameters
-		{
-			Type = FAudio.FAudioFilterType.FAudioLowPassFilter,
-			Frequency = 1f,
-			OneOverQ = 1f
-		};
-
-		/// <summary>
-		/// The frequency cutoff on the voice filter.
-		/// </summary>
-		public float FilterFrequency
-		{
-			get => filterParameters.Frequency;
-			internal set
-			{
-				value = System.Math.Clamp(value, 0.01f, MAX_FILTER_FREQUENCY);
-				if (filterParameters.Frequency != value)
-				{
-					filterParameters.Frequency = value;
-
-					FAudio.FAudioVoice_SetFilterParameters(
-						Handle,
-						ref filterParameters,
-						0
-					);
-				}
-			}
-		}
-
-		/// <summary>
-		/// Reciprocal of Q factor.
-		/// Controls how quickly frequencies beyond the filter frequency are dampened.
-		/// </summary>
-		public float FilterOneOverQ
-		{
-			get => filterParameters.OneOverQ;
-			internal set
-			{
-				value = System.Math.Clamp(value, 0.01f, MAX_FILTER_ONEOVERQ);
-				if (filterParameters.OneOverQ != value)
-				{
-					filterParameters.OneOverQ = value;
-
-					FAudio.FAudioVoice_SetFilterParameters(
-						Handle,
-						ref filterParameters,
-						0
-					);
-				}
-			}
-		}
-
-		private FilterType filterType;
-		/// <summary>
-		/// The frequency filter that is applied to the voice.
-		/// </summary>
-		public FilterType FilterType
-		{
-			get => filterType;
-			set
-			{
-				if (filterType != value)
-				{
-					filterType = value;
-
-					switch (filterType)
-					{
-						case FilterType.None:
-							filterParameters = new FAudio.FAudioFilterParameters
-							{
-								Type = FAudio.FAudioFilterType.FAudioLowPassFilter,
-								Frequency = 1f,
-								OneOverQ = 1f
-							};
-							break;
-
-						case FilterType.LowPass:
-							filterParameters.Type = FAudio.FAudioFilterType.FAudioLowPassFilter;
-							filterParameters.Frequency = 1f;
-							break;
-
-						case FilterType.BandPass:
-							filterParameters.Type = FAudio.FAudioFilterType.FAudioBandPassFilter;
-							break;
-
-						case FilterType.HighPass:
-							filterParameters.Type = FAudio.FAudioFilterType.FAudioHighPassFilter;
-							filterParameters.Frequency = 0f;
-							break;
-					}
-
-					FAudio.FAudioVoice_SetFilterParameters(
-						Handle,
-						ref filterParameters,
-						0
-					);
-				}
-			}
-		}
-
-		protected float pan = 0;
-		/// <summary>
-		/// Left-right panning. -1 is hard left pan, 1 is hard right pan.
-		/// </summary>
-		public float Pan
-		{
-			get => pan;
-			internal set
-			{
-				value = Math.MathHelper.Clamp(value, -1f, 1f);
-				if (pan != value)
-				{
-					pan = value;
-
-					if (pan < -1f)
-					{
-						pan = -1f;
-					}
-					if (pan > 1f)
-					{
-						pan = 1f;
-					}
-
-					if (Is3D) { return; }
-
-					SetPanMatrixCoefficients();
-					FAudio.FAudioVoice_SetOutputMatrix(
-						Handle,
-						OutputVoice.Handle,
-						SourceChannelCount,
-						DestinationChannelCount,
-						(nint) pMatrixCoefficients,
-						0
-					);
-				}
-			}
-		}
-
-		private float reverb;
-		/// <summary>
-		/// The wet-dry mix of the reverb effect.
-		/// Has no effect if SetReverbEffectChain has not been called.
-		/// </summary>
-		public unsafe float Reverb
-		{
-			get => reverb;
-			internal set
-			{
-				if (ReverbEffect != null)
-				{
-					value = MathF.Max(0, value);
-					if (reverb != value)
-					{
-						reverb = value;
-
-						float* outputMatrix = (float*) pMatrixCoefficients;
-						outputMatrix[0] = reverb;
-						if (SourceChannelCount == 2)
-						{
-							outputMatrix[1] = reverb;
-						}
-
-						FAudio.FAudioVoice_SetOutputMatrix(
-							Handle,
-							ReverbEffect.Handle,
-							SourceChannelCount,
-							1,
-							(nint) pMatrixCoefficients,
-							0
-						);
-					}
-				}
-
-				#if DEBUG
-				if (ReverbEffect == null)
-				{
-					Logger.LogWarn("Tried to set reverb value before applying a reverb effect");
-				}
-				#endif
-			}
-		}
-
-		public Voice(AudioDevice device, uint sourceChannelCount, uint destinationChannelCount) : base(device)
-		{
-			SourceChannelCount = sourceChannelCount;
-			DestinationChannelCount = destinationChannelCount;
-			nuint memsize = 4 * sourceChannelCount * destinationChannelCount;
-			pMatrixCoefficients = (byte*) NativeMemory.AllocZeroed(memsize);
-			SetPanMatrixCoefficients();
-		}
-
-		/// <summary>
-		/// Sets the pitch of the voice. Valid input range is -1f to 1f.
-		/// </summary>
-		public void SetPitch(float targetValue)
-		{
-			Pitch = targetValue;
-			Device.ClearTweens(this, AudioTweenProperty.Pitch);
-		}
-
-		/// <summary>
-		/// Sets the pitch of the voice over a time duration in seconds.
-		/// </summary>
-		/// <param name="easingFunction">An easing function. See MoonWorks.Math.Easing.Function.Float</param>
-		public void SetPitch(float targetValue, float duration, EasingFunction easingFunction)
-		{
-			Device.CreateTween(this, AudioTweenProperty.Pitch, easingFunction, Pitch, targetValue, duration, 0);
-		}
-
-		/// <summary>
-		/// Sets the pitch of the voice over a time duration in seconds after a delay in seconds.
-		/// </summary>
-		/// <param name="easingFunction">An easing function. See MoonWorks.Math.Easing.Function.Float</param>
-		public void SetPitch(float targetValue, float delayTime, float duration, EasingFunction easingFunction)
-		{
-			Device.CreateTween(this, AudioTweenProperty.Pitch, easingFunction, Pitch, targetValue, duration, delayTime);
-		}
-
-		/// <summary>
-		/// Sets the volume of the voice. Minimum value is 0f.
-		/// </summary>
-		public void SetVolume(float targetValue)
-		{
-			Volume = targetValue;
-			Device.ClearTweens(this, AudioTweenProperty.Volume);
-		}
-
-		/// <summary>
-		/// Sets the volume of the voice over a time duration in seconds.
-		/// </summary>
-		/// <param name="easingFunction">An easing function. See MoonWorks.Math.Easing.Function.Float</param>
-		public void SetVolume(float targetValue, float duration, EasingFunction easingFunction)
-		{
-			Device.CreateTween(this, AudioTweenProperty.Volume, easingFunction, Volume, targetValue, duration, 0);
-		}
-
-		/// <summary>
-		/// Sets the volume of the voice over a time duration in seconds after a delay in seconds.
-		/// </summary>
-		/// <param name="easingFunction">An easing function. See MoonWorks.Math.Easing.Function.Float</param>
-		public void SetVolume(float targetValue, float delayTime, float duration, EasingFunction easingFunction)
-		{
-			Device.CreateTween(this, AudioTweenProperty.Volume, easingFunction, Volume, targetValue, duration, delayTime);
-		}
-
-		/// <summary>
-		/// Sets the frequency cutoff on the voice filter. Valid range is 0.01f to 1f.
-		/// </summary>
-		public void SetFilterFrequency(float targetValue)
-		{
-			FilterFrequency = targetValue;
-			Device.ClearTweens(this, AudioTweenProperty.FilterFrequency);
-		}
-
-		/// <summary>
-		/// Sets the frequency cutoff on the voice filter over a time duration in seconds.
-		/// </summary>
-		/// <param name="easingFunction">An easing function. See MoonWorks.Math.Easing.Function.Float</param>
-		public void SetFilterFrequency(float targetValue, float duration, EasingFunction easingFunction)
-		{
-			Device.CreateTween(this, AudioTweenProperty.FilterFrequency, easingFunction, FilterFrequency, targetValue, duration, 0);
-		}
-
-		/// <summary>
-		/// Sets the frequency cutoff on the voice filter over a time duration in seconds after a delay in seconds.
-		/// </summary>
-		/// <param name="easingFunction">An easing function. See MoonWorks.Math.Easing.Function.Float</param>
-		public void SetFilterFrequency(float targetValue, float delayTime, float duration, EasingFunction easingFunction)
-		{
-			Device.CreateTween(this, AudioTweenProperty.FilterFrequency, easingFunction, FilterFrequency, targetValue, duration, delayTime);
-		}
-
-		/// <summary>
-		/// Sets reciprocal of Q factor on the frequency filter.
-		/// Controls how quickly frequencies beyond the filter frequency are dampened.
-		/// </summary>
-		public void SetFilterOneOverQ(float targetValue)
-		{
-			FilterOneOverQ = targetValue;
-		}
-
-		/// <summary>
-		/// Sets a left-right panning value. -1f is hard left pan, 1f is hard right pan.
-		/// </summary>
-		public virtual void SetPan(float targetValue)
-		{
-			Pan = targetValue;
-			Device.ClearTweens(this, AudioTweenProperty.Pan);
-		}
-
-		/// <summary>
-		/// Sets a left-right panning value over a time duration in seconds.
-		/// </summary>
-		/// <param name="easingFunction">An easing function. See MoonWorks.Math.Easing.Function.Float</param>
-		public virtual void SetPan(float targetValue, float duration, EasingFunction easingFunction)
-		{
-			Device.CreateTween(this, AudioTweenProperty.Pan, easingFunction, Pan, targetValue, duration, 0);
-		}
-
-		/// <summary>
-		/// Sets a left-right panning value over a time duration in seconds after a delay in seconds.
-		/// </summary>
-		/// <param name="easingFunction">An easing function. See MoonWorks.Math.Easing.Function.Float</param>
-		public virtual void SetPan(float targetValue, float delayTime, float duration, EasingFunction easingFunction)
-		{
-			Device.CreateTween(this, AudioTweenProperty.Pan, easingFunction, Pan, targetValue, duration, delayTime);
-		}
-
-		/// <summary>
-		/// Sets the wet-dry mix value of the reverb effect. Minimum value is 0f.
-		/// </summary>
-		public virtual void SetReverb(float targetValue)
-		{
-			Reverb = targetValue;
-			Device.ClearTweens(this, AudioTweenProperty.Reverb);
-		}
-
-		/// <summary>
-		/// Sets the wet-dry mix value of the reverb effect over a time duration in seconds.
-		/// </summary>
-		/// <param name="easingFunction">An easing function. See MoonWorks.Math.Easing.Function.Float</param>
-		public virtual void SetReverb(float targetValue, float duration, EasingFunction easingFunction)
-		{
-			Device.CreateTween(this, AudioTweenProperty.Reverb, easingFunction, Volume, targetValue, duration, 0);
-		}
-
-		/// <summary>
-		/// Sets the wet-dry mix value of the reverb effect over a time duration in seconds after a delay in seconds.
-		/// </summary>
-		/// <param name="easingFunction">An easing function. See MoonWorks.Math.Easing.Function.Float</param>
-		public virtual void SetReverb(float targetValue, float delayTime, float duration, EasingFunction easingFunction)
-		{
-			Device.CreateTween(this, AudioTweenProperty.Reverb, easingFunction, Volume, targetValue, duration, delayTime);
-		}
-
-		/// <summary>
-		/// Sets the output voice for this voice.
-		/// </summary>
-		/// <param name="send">Where the output should be sent.</param>
-		public unsafe void SetOutputVoice(SubmixVoice send)
-		{
-			OutputVoice = send;
-
-			if (ReverbEffect != null)
-			{
-				SetReverbEffectChain(ReverbEffect);
-			}
-			else
-			{
-				FAudio.FAudioSendDescriptor* sendDesc = stackalloc FAudio.FAudioSendDescriptor[1];
-				sendDesc[0].Flags = 0;
-				sendDesc[0].pOutputVoice = send.Handle;
-
-				var sends = new FAudio.FAudioVoiceSends();
-				sends.SendCount = 1;
-				sends.pSends = (nint) sendDesc;
-
-				FAudio.FAudioVoice_SetOutputVoices(
-					Handle,
-					ref sends
-				);
-			}
-		}
-
-		/// <summary>
-		/// Applies a reverb effect chain to this voice.
-		/// </summary>
-		public unsafe void SetReverbEffectChain(ReverbEffect reverbEffect)
-		{
-			var sendDesc = stackalloc FAudio.FAudioSendDescriptor[2];
-			sendDesc[0].Flags = 0;
-			sendDesc[0].pOutputVoice = OutputVoice.Handle;
-			sendDesc[1].Flags = 0;
-			sendDesc[1].pOutputVoice = reverbEffect.Handle;
-
-			var sends = new FAudio.FAudioVoiceSends();
-			sends.SendCount = 2;
-			sends.pSends = (nint) sendDesc;
-
-			FAudio.FAudioVoice_SetOutputVoices(
-				Handle,
-				ref sends
-			);
-
-			ReverbEffect = reverbEffect;
-		}
-
-		/// <summary>
-		/// Removes the reverb effect chain from this voice.
-		/// </summary>
-		public void RemoveReverbEffectChain()
-		{
-			if (ReverbEffect != null)
-			{
-				ReverbEffect = null;
-				reverb = 0;
-				SetOutputVoice(OutputVoice);
-			}
-		}
-
-		/// <summary>
-		/// Resets all voice parameters to defaults.
-		/// </summary>
-		public virtual void Reset()
-		{
-			RemoveReverbEffectChain();
-			Volume = 1;
-			Pan = 0;
-			Pitch = 0;
-			FilterType = FilterType.None;
-			SetOutputVoice(Device.MasteringVoice);
-		}
-
-		// Taken from https://github.com/FNA-XNA/FNA/blob/master/src/Audio/SoundEffectInstance.cs
-		private unsafe void SetPanMatrixCoefficients()
-		{
-			/* Two major things to notice:
-			 * 1. The spec assumes any speaker count >= 2 has Front Left/Right.
-			 * 2. Stereo panning is WAY more complicated than you think.
-			 *    The main thing is that hard panning does NOT eliminate an
-			 *    entire channel; the two channels are blended on each side.
-			 * -flibit
-			 */
-			float* outputMatrix = (float*) pMatrixCoefficients;
-			if (SourceChannelCount == 1)
-			{
-				if (DestinationChannelCount == 1)
-				{
-					outputMatrix[0] = 1.0f;
-				}
-				else
-				{
-					outputMatrix[0] = (pan > 0.0f) ? (1.0f - pan) : 1.0f;
-					outputMatrix[1] = (pan < 0.0f) ? (1.0f + pan) : 1.0f;
-				}
-			}
-			else
-			{
-				if (DestinationChannelCount == 1)
-				{
-					outputMatrix[0] = 1.0f;
-					outputMatrix[1] = 1.0f;
-				}
-				else
-				{
-					if (pan <= 0.0f)
-					{
-						// Left speaker blends left/right channels
-						outputMatrix[0] = 0.5f * pan + 1.0f;
-						outputMatrix[1] = 0.5f * -pan;
-						// Right speaker gets less of the right channel
-						outputMatrix[2] = 0.0f;
-						outputMatrix[3] = pan + 1.0f;
-					}
-					else
-					{
-						// Left speaker gets less of the left channel
-						outputMatrix[0] = -pan + 1.0f;
-						outputMatrix[1] = 0.0f;
-						// Right speaker blends right/left channels
-						outputMatrix[2] = 0.5f * pan;
-						outputMatrix[3] = 0.5f * -pan + 1.0f;
-					}
-				}
-			}
-		}
-
-		protected void UpdatePitch()
-		{
-			float doppler;
-			float dopplerScale = Device.DopplerScale;
-			if (!Is3D || dopplerScale == 0.0f)
-			{
-				doppler = 1.0f;
-			}
-			else
-			{
-				doppler = DopplerFactor * dopplerScale;
-			}
-
-			FAudio.FAudioSourceVoice_SetFrequencyRatio(
-				Handle,
-				(float) System.Math.Pow(2.0, pitch) * doppler,
-				0
-			);
-		}
-
-		protected override unsafe void Dispose(bool disposing)
-		{
-			if (!IsDisposed)
-			{
-				NativeMemory.Free(pMatrixCoefficients);
-				FAudio.FAudioVoice_DestroyVoice(Handle);
-			}
-			base.Dispose(disposing);
-		}
-	}
-}

src/Collision/Fixed/AABB2D.cs

@@ -0,0 +1,181 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Fixed;
+
+namespace MoonWorks.Collision.Fixed
+{
+	/// <summary>
+	/// Axis-aligned bounding box.
+	/// </summary>
+	public struct AABB2D : System.IEquatable<AABB2D>
+	{
+		/// <summary>
+		/// The top-left position of the AABB.
+		/// </summary>
+		/// <value></value>
+		public Vector2 Min { get; private set; }
+
+		/// <summary>
+		/// The bottom-right position of the AABB.
+		/// </summary>
+		/// <value></value>
+		public Vector2 Max { get; private set; }
+
+		public Fix64 Width { get { return Max.X - Min.X; } }
+		public Fix64 Height { get { return Max.Y - Min.Y; } }
+
+		public Fix64 Right { get { return Max.X; } }
+		public Fix64 Left { get { return Min.X; } }
+
+		/// <summary>
+		/// The top of the AABB. Assumes a downward-aligned Y axis, so this value will be smaller than Bottom.
+		/// </summary>
+		/// <value></value>
+		public Fix64 Top { get { return Min.Y; } }
+
+		/// <summary>
+		/// The bottom of the AABB. Assumes a downward-aligned Y axis, so this value will be larger than Top.
+		/// </summary>
+		/// <value></value>
+		public Fix64 Bottom { get { return Max.Y; } }
+
+		public AABB2D(Fix64 minX, Fix64 minY, Fix64 maxX, Fix64 maxY)
+		{
+			Min = new Vector2(minX, minY);
+			Max = new Vector2(maxX, maxY);
+		}
+
+		public AABB2D(int minX, int minY, int maxX, int maxY)
+		{
+			Min = new Vector2(minX, minY);
+			Max = new Vector2(maxX, maxY);
+		}
+
+		public AABB2D(Vector2 min, Vector2 max)
+		{
+			Min = min;
+			Max = max;
+		}
+
+		private static Matrix3x2 AbsoluteMatrix(Matrix3x2 matrix)
+		{
+			return new Matrix3x2
+			(
+				Fix64.Abs(matrix.M11), Fix64.Abs(matrix.M12),
+				Fix64.Abs(matrix.M21), Fix64.Abs(matrix.M22),
+				Fix64.Abs(matrix.M31), Fix64.Abs(matrix.M32)
+			);
+		}
+
+		/// <summary>
+		/// Efficiently transforms the AABB by a Transform2D.
+		/// </summary>
+		/// <param name="aabb"></param>
+		/// <param name="transform"></param>
+		/// <returns></returns>
+		public static AABB2D Transformed(AABB2D aabb, Transform2D transform)
+		{
+			var two = new Fix64(2);
+			var center = (aabb.Min + aabb.Max) / two;
+            var extent = (aabb.Max - aabb.Min) / two;
+
+            var newCenter = Vector2.Transform(center, transform.TransformMatrix);
+            var newExtent = Vector2.TransformNormal(extent, AbsoluteMatrix(transform.TransformMatrix));
+
+            return new AABB2D(newCenter - newExtent, newCenter + newExtent);
+		}
+
+		public AABB2D Compose(AABB2D aabb)
+		{
+			Fix64 left = Left;
+			Fix64 top = Top;
+			Fix64 right = Right;
+			Fix64 bottom = Bottom;
+
+			if (aabb.Left < left)
+			{
+				left = aabb.Left;
+			}
+			if (aabb.Right > right)
+			{
+				right = aabb.Right;
+			}
+			if (aabb.Top < top)
+			{
+				top = aabb.Top;
+			}
+			if (aabb.Bottom > bottom)
+			{
+				bottom = aabb.Bottom;
+			}
+
+			return new AABB2D(left, top, right, bottom);
+		}
+
+		/// <summary>
+		/// Creates an AABB for an arbitrary collection of positions.
+		/// This is less efficient than defining a custom AABB method for most shapes, so avoid using this if possible.
+		/// </summary>
+		/// <param name="vertices"></param>
+		/// <returns></returns>
+		public static AABB2D FromVertices(IEnumerable<Vector2> vertices)
+		{
+			var minX = Fix64.MaxValue;
+			var minY = Fix64.MaxValue;
+			var maxX = Fix64.MinValue;
+			var maxY = Fix64.MinValue;
+
+			foreach (var vertex in vertices)
+			{
+				if (vertex.X < minX)
+				{
+					minX = vertex.X;
+				}
+				if (vertex.Y < minY)
+				{
+					minY = vertex.Y;
+				}
+				if (vertex.X > maxX)
+				{
+					maxX = vertex.X;
+				}
+				if (vertex.Y > maxY)
+				{
+					maxY = vertex.Y;
+				}
+			}
+
+			return new AABB2D(minX, minY, maxX, maxY);
+		}
+
+		public static bool TestOverlap(AABB2D a, AABB2D b)
+		{
+			return a.Left < b.Right && a.Right > b.Left && a.Top < b.Bottom && a.Bottom > b.Top;
+		}
+
+		public override bool Equals(object obj)
+		{
+			return obj is AABB2D aabb && Equals(aabb);
+		}
+
+		public bool Equals(AABB2D other)
+		{
+			return Min == other.Min &&
+				   Max == other.Max;
+		}
+
+		public override int GetHashCode()
+		{
+			return System.HashCode.Combine(Min, Max);
+		}
+
+		public static bool operator ==(AABB2D left, AABB2D right)
+		{
+			return left.Equals(right);
+		}
+
+		public static bool operator !=(AABB2D left, AABB2D right)
+		{
+			return !(left == right);
+		}
+	}
+}

src/Collision/Fixed/ICollidable.cs

@@ -0,0 +1,12 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Fixed;
+
+namespace MoonWorks.Collision.Fixed
+{
+	public interface ICollidable
+	{
+		IEnumerable<IShape2D> Shapes { get; }
+		AABB2D AABB { get; }
+		AABB2D TransformedAABB(Transform2D transform);
+	}
+}

src/Collision/Fixed/IShape2D.cs

@@ -0,0 +1,15 @@
+using MoonWorks.Math.Fixed;
+
+namespace MoonWorks.Collision.Fixed
+{
+	public interface IShape2D : ICollidable, System.IEquatable<IShape2D>
+	{
+		/// <summary>
+		/// A Minkowski support function. Gives the farthest point on the edge of a shape along the given direction.
+		/// </summary>
+		/// <param name="direction">A normalized Vector2.</param>
+		/// <param name="transform">A Transform for transforming the shape vertices.</param>
+		/// <returns>The farthest point on the edge of the shape along the given direction.</returns>
+		Vector2 Support(Vector2 direction, Transform2D transform);
+	}
+}

src/Collision/Fixed/MinkowskiDifference.cs

@@ -0,0 +1,57 @@
+using MoonWorks.Math.Fixed;
+
+namespace MoonWorks.Collision.Fixed
+{
+	/// <summary>
+	/// A Minkowski difference between two shapes.
+	/// </summary>
+	public struct MinkowskiDifference : System.IEquatable<MinkowskiDifference>
+	{
+		private IShape2D ShapeA { get; }
+		private Transform2D TransformA { get; }
+		private IShape2D ShapeB { get; }
+		private Transform2D TransformB { get; }
+
+		public MinkowskiDifference(IShape2D shapeA, Transform2D transformA, IShape2D shapeB, Transform2D transformB)
+		{
+			ShapeA = shapeA;
+			TransformA = transformA;
+			ShapeB = shapeB;
+			TransformB = transformB;
+		}
+
+		public Vector2 Support(Vector2 direction)
+		{
+			return ShapeA.Support(direction, TransformA) - ShapeB.Support(-direction, TransformB);
+		}
+
+		public override bool Equals(object other)
+		{
+			return other is MinkowskiDifference minkowskiDifference && Equals(minkowskiDifference);
+		}
+
+		public bool Equals(MinkowskiDifference other)
+		{
+			return
+				ShapeA == other.ShapeA &&
+				TransformA == other.TransformA &&
+				ShapeB == other.ShapeB &&
+				TransformB == other.TransformB;
+		}
+
+		public override int GetHashCode()
+		{
+			return System.HashCode.Combine(ShapeA, TransformA, ShapeB, TransformB);
+		}
+
+		public static bool operator ==(MinkowskiDifference a, MinkowskiDifference b)
+		{
+			return a.Equals(b);
+		}
+
+		public static bool operator !=(MinkowskiDifference a, MinkowskiDifference b)
+		{
+			return !(a == b);
+		}
+	}
+}

src/Collision/Fixed/NarrowPhase.cs

@@ -0,0 +1,333 @@
+using MoonWorks.Math.Fixed;
+
+namespace MoonWorks.Collision.Fixed
+{
+	public static class NarrowPhase
+	{
+		private struct Edge
+		{
+			public Fix64 Distance;
+			public Vector2 Normal;
+			public int Index;
+		}
+
+        public static bool TestCollision(ICollidable collidableA, Transform2D transformA, ICollidable collidableB, Transform2D transformB)
+        {
+            foreach (var shapeA in collidableA.Shapes)
+            {
+                foreach (var shapeB in collidableB.Shapes)
+                {
+					if (TestCollision(shapeA, transformA, shapeB, transformB))
+                    {
+						return true;
+					}
+				}
+            }
+
+			return false;
+		}
+
+		public static bool TestCollision(IShape2D shapeA, Transform2D transformA, IShape2D shapeB, Transform2D transformB)
+		{
+			// If we can use a fast path check, let's do that!
+			if (shapeA is Rectangle rectangleA && shapeB is Rectangle rectangleB && transformA.IsAxisAligned && transformB.IsAxisAligned)
+			{
+				return TestRectangleOverlap(rectangleA, transformA, rectangleB, transformB);
+			}
+			else if (shapeA is Point && shapeB is Rectangle && transformB.IsAxisAligned)
+			{
+				return TestPointRectangleOverlap((Point) shapeA, transformA, (Rectangle) shapeB, transformB);
+			}
+			else if (shapeA is Rectangle && shapeB is Point && transformA.IsAxisAligned)
+			{
+				return TestPointRectangleOverlap((Point) shapeB, transformB, (Rectangle) shapeA, transformA);
+			}
+			else if (shapeA is Rectangle && shapeB is Circle && transformA.IsAxisAligned && transformB.IsUniformScale)
+			{
+				return TestCircleRectangleOverlap((Circle) shapeB, transformB, (Rectangle) shapeA, transformA);
+			}
+			else if (shapeA is Circle && shapeB is Rectangle && transformA.IsUniformScale && transformB.IsAxisAligned)
+			{
+				return TestCircleRectangleOverlap((Circle) shapeA, transformA, (Rectangle) shapeB, transformB);
+			}
+			else if (shapeA is Circle && shapeB is Point && transformA.IsUniformScale)
+			{
+				return TestCirclePointOverlap((Circle) shapeA, transformA, (Point) shapeB, transformB);
+			}
+			else if (shapeA is Point && shapeB is Circle && transformB.IsUniformScale)
+			{
+				return TestCirclePointOverlap((Circle) shapeB, transformB, (Point) shapeA, transformA);
+			}
+			else if (shapeA is Circle circleA && shapeB is Circle circleB && transformA.IsUniformScale && transformB.IsUniformScale)
+			{
+				return TestCircleOverlap(circleA, transformA, circleB, transformB);
+			}
+
+			// Sad, we can't do a fast path optimization. Time for a simplex reduction.
+			return FindCollisionSimplex(shapeA, transformA, shapeB, transformB).Item1;
+		}
+
+		public static bool TestRectangleOverlap(Rectangle rectangleA, Transform2D transformA, Rectangle rectangleB, Transform2D transformB)
+		{
+			var firstAABB = rectangleA.TransformedAABB(transformA);
+			var secondAABB = rectangleB.TransformedAABB(transformB);
+
+			return firstAABB.Left < secondAABB.Right && firstAABB.Right > secondAABB.Left && firstAABB.Top < secondAABB.Bottom && firstAABB.Bottom > secondAABB.Top;
+		}
+
+		public static bool TestPointRectangleOverlap(Point point, Transform2D pointTransform, Rectangle rectangle, Transform2D rectangleTransform)
+		{
+			var transformedPoint = pointTransform.Position;
+			var AABB = rectangle.TransformedAABB(rectangleTransform);
+
+			return transformedPoint.X > AABB.Left && transformedPoint.X < AABB.Right && transformedPoint.Y < AABB.Bottom && transformedPoint.Y > AABB.Top;
+		}
+
+		public static bool TestCirclePointOverlap(Circle circle, Transform2D circleTransform, Point point, Transform2D pointTransform)
+		{
+			var circleCenter = circleTransform.Position;
+			var circleRadius = circle.Radius * circleTransform.Scale.X;
+
+			var distanceX = circleCenter.X - pointTransform.Position.X;
+			var distanceY = circleCenter.Y - pointTransform.Position.Y;
+
+			return (distanceX * distanceX) + (distanceY * distanceY) < (circleRadius * circleRadius);
+		}
+
+		/// <summary>
+		/// NOTE: The rectangle must be axis aligned, and the scaling of the circle must be uniform.
+		/// </summary>
+		public static bool TestCircleRectangleOverlap(Circle circle, Transform2D circleTransform, Rectangle rectangle, Transform2D rectangleTransform)
+		{
+			var circleCenter = circleTransform.Position;
+			var circleRadius = circle.Radius * circleTransform.Scale.X;
+			var AABB = rectangle.TransformedAABB(rectangleTransform);
+
+			var closestX = Fix64.Clamp(circleCenter.X, AABB.Left, AABB.Right);
+			var closestY = Fix64.Clamp(circleCenter.Y, AABB.Top, AABB.Bottom);
+
+			var distanceX = circleCenter.X - closestX;
+			var distanceY = circleCenter.Y - closestY;
+
+			var distanceSquared = (distanceX * distanceX) + (distanceY * distanceY);
+			return distanceSquared < (circleRadius * circleRadius);
+		}
+
+		public static bool TestCircleOverlap(Circle circleA, Transform2D transformA, Circle circleB, Transform2D transformB)
+		{
+			var radiusA = circleA.Radius * transformA.Scale.X;
+			var radiusB = circleB.Radius * transformB.Scale.Y;
+
+			var centerA = transformA.Position;
+			var centerB = transformB.Position;
+
+			var distanceSquared = (centerA - centerB).LengthSquared();
+			var radiusSumSquared = (radiusA + radiusB) * (radiusA + radiusB);
+
+			return distanceSquared < radiusSumSquared;
+		}
+
+		public static (bool, Simplex2D) FindCollisionSimplex(IShape2D shapeA, Transform2D transformA, IShape2D shapeB, Transform2D transformB)
+		{
+			var minkowskiDifference = new MinkowskiDifference(shapeA, transformA, shapeB, transformB);
+			var c = minkowskiDifference.Support(Vector2.UnitX);
+			var b = minkowskiDifference.Support(-Vector2.UnitX);
+			return Check(minkowskiDifference, c, b);
+		}
+
+        public unsafe static Vector2 Intersect(IShape2D shapeA, Transform2D Transform2DA, IShape2D shapeB, Transform2D Transform2DB, Simplex2D simplex)
+        {
+            if (shapeA == null) { throw new System.ArgumentNullException(nameof(shapeA)); }
+            if (shapeB == null) { throw new System.ArgumentNullException(nameof(shapeB)); }
+            if (!simplex.TwoSimplex) { throw new System.ArgumentException("Simplex must be a 2-Simplex.", nameof(simplex)); }
+
+			var epsilon = Fix64.FromFraction(1, 10000);
+
+			var a = simplex.A;
+            var b = simplex.B.Value;
+            var c = simplex.C.Value;
+
+            Vector2 intersection = default;
+
+            for (var i = 0; i < 32; i++)
+            {
+                var edge = FindClosestEdge(simplex);
+                var support = CalculateSupport(shapeA, Transform2DA, shapeB, Transform2DB, edge.Normal);
+                var distance = Vector2.Dot(support, edge.Normal);
+
+                intersection = edge.Normal;
+                intersection *= distance;
+
+                if (Fix64.Abs(distance - edge.Distance) <= epsilon)
+                {
+                    return intersection;
+                }
+                else
+                {
+					simplex.Insert(support, edge.Index);
+                }
+            }
+
+            return intersection; // close enough
+        }
+
+        private static unsafe Edge FindClosestEdge(Simplex2D simplex)
+        {
+			var closestDistance = Fix64.MaxValue;
+            var closestNormal = Vector2.Zero;
+            var closestIndex = 0;
+
+			for (var i = 0; i < 4; i += 1)
+			{
+				var j = (i + 1 == 3) ? 0 : i + 1;
+
+				var a = simplex[i];
+				var b = simplex[j];
+
+				var e = b - a;
+
+				var oa = a;
+
+				var n = Vector2.Normalize(TripleProduct(e, oa, e));
+
+				var d = Vector2.Dot(n, a);
+
+				if (d < closestDistance)
+				{
+					closestDistance = d;
+					closestNormal = n;
+					closestIndex = j;
+				}
+			}
+
+            return new Edge
+			{
+				Distance = closestDistance,
+				Normal = closestNormal,
+				Index = closestIndex
+			};
+        }
+
+        private static Vector2 CalculateSupport(IShape2D shapeA, Transform2D Transform2DA, IShape2D shapeB, Transform2D Transform2DB, Vector2 direction)
+        {
+            return shapeA.Support(direction, Transform2DA) - shapeB.Support(-direction, Transform2DB);
+        }
+
+		private static (bool, Simplex2D) Check(MinkowskiDifference minkowskiDifference, Vector2 c, Vector2 b)
+        {
+            var cb = c - b;
+            var c0 = -c;
+            var d = Direction(cb, c0);
+            return DoSimplex(minkowskiDifference, new Simplex2D(b, c), d);
+        }
+
+        private static (bool, Simplex2D) DoSimplex(MinkowskiDifference minkowskiDifference, Simplex2D simplex, Vector2 direction)
+        {
+            var a = minkowskiDifference.Support(direction);
+            var notPastOrigin = Vector2.Dot(a, direction) < Fix64.Zero;
+            var (intersects, newSimplex, newDirection) = EnclosesOrigin(a, simplex);
+
+            if (notPastOrigin)
+            {
+                return (false, default(Simplex2D));
+            }
+            else if (intersects)
+            {
+                return (true, new Simplex2D(simplex.A, simplex.B.Value, a));
+            }
+            else
+            {
+                return DoSimplex(minkowskiDifference, newSimplex, newDirection);
+            }
+        }
+
+        private static (bool, Simplex2D, Vector2) EnclosesOrigin(Vector2 a, Simplex2D simplex)
+        {
+            if (simplex.ZeroSimplex)
+            {
+                return HandleZeroSimplex(a, simplex.A);
+            }
+            else if (simplex.OneSimplex)
+            {
+                return HandleOneSimplex(a, simplex.A, simplex.B.Value);
+            }
+            else
+            {
+                return (false, simplex, Vector2.Zero);
+            }
+        }
+
+        private static (bool, Simplex2D, Vector2) HandleZeroSimplex(Vector2 a, Vector2 b)
+        {
+            var ab = b - a;
+            var a0 = -a;
+            var (newSimplex, newDirection) = SameDirection(ab, a0) ? (new Simplex2D(a, b), Perpendicular(ab, a0)) : (new Simplex2D(a), a0);
+            return (false, newSimplex, newDirection);
+        }
+
+        private static (bool, Simplex2D, Vector2) HandleOneSimplex(Vector2 a, Vector2 b, Vector2 c)
+        {
+            var a0 = -a;
+            var ab = b - a;
+            var ac = c - a;
+            var abp = Perpendicular(ab, -ac);
+            var acp = Perpendicular(ac, -ab);
+
+            if (SameDirection(abp, a0))
+            {
+                if (SameDirection(ab, a0))
+                {
+                    return (false, new Simplex2D(a, b), abp);
+                }
+                else
+                {
+                    return (false, new Simplex2D(a), a0);
+                }
+            }
+            else if (SameDirection(acp, a0))
+            {
+                if (SameDirection(ac, a0))
+                {
+                    return (false, new Simplex2D(a, c), acp);
+                }
+                else
+                {
+                    return (false, new Simplex2D(a), a0);
+                }
+            }
+            else
+            {
+                return (true, new Simplex2D(b, c), a0);
+            }
+        }
+
+        private static Vector2 TripleProduct(Vector2 a, Vector2 b, Vector2 c)
+        {
+            var A = new Vector3(a.X, a.Y, Fix64.Zero);
+            var B = new Vector3(b.X, b.Y, Fix64.Zero);
+            var C = new Vector3(c.X, c.Y, Fix64.Zero);
+
+            var first = Vector3.Cross(A, B);
+            var second = Vector3.Cross(first, C);
+
+            return new Vector2(second.X, second.Y);
+        }
+
+        private static Vector2 Direction(Vector2 a, Vector2 b)
+        {
+            var d = TripleProduct(a, b, a);
+            var collinear = d == Vector2.Zero;
+            return collinear ? new Vector2(a.Y, -a.X) : d;
+        }
+
+        private static bool SameDirection(Vector2 a, Vector2 b)
+        {
+            return Vector2.Dot(a, b) > Fix64.Zero;
+        }
+
+        private static Vector2 Perpendicular(Vector2 a, Vector2 b)
+        {
+            return TripleProduct(a, b, a);
+        }
+	}
+}

src/Collision/Fixed/Shapes/Circle.cs

@@ -0,0 +1,73 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Fixed;
+
+namespace MoonWorks.Collision.Fixed
+{
+	/// <summary>
+	/// A Circle is a shape defined by a radius.
+	/// </summary>
+	public struct Circle : IShape2D, System.IEquatable<Circle>
+	{
+		public Fix64 Radius { get; }
+		public AABB2D AABB { get; }
+		public IEnumerable<IShape2D> Shapes
+		{
+			get
+			{
+				yield return this;
+			}
+		}
+
+		public Circle(Fix64 radius)
+		{
+			Radius = radius;
+			AABB = new AABB2D(-Radius, -Radius, Radius, Radius);
+		}
+
+		public Circle(int radius)
+		{
+			Radius = (Fix64) radius;
+			AABB = new AABB2D(-Radius, -Radius, Radius, Radius);
+		}
+
+		public Vector2 Support(Vector2 direction, Transform2D transform)
+		{
+			return Vector2.Transform(Vector2.Normalize(direction) * Radius, transform.TransformMatrix);
+		}
+
+		public AABB2D TransformedAABB(Transform2D transform2D)
+		{
+			return AABB2D.Transformed(AABB, transform2D);
+		}
+
+		public override bool Equals(object obj)
+		{
+			return obj is IShape2D other && Equals(other);
+		}
+
+		public bool Equals(IShape2D other)
+		{
+			return other is Circle circle && Equals(circle);
+		}
+
+		public bool Equals(Circle other)
+		{
+			return Radius == other.Radius;
+		}
+
+		public override int GetHashCode()
+		{
+			return System.HashCode.Combine(Radius);
+		}
+
+		public static bool operator ==(Circle a, Circle b)
+		{
+			return a.Equals(b);
+		}
+
+		public static bool operator !=(Circle a, Circle b)
+		{
+			return !(a == b);
+		}
+	}
+}

src/Collision/Fixed/Shapes/Line.cs

@@ -0,0 +1,83 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Fixed;
+
+namespace MoonWorks.Collision.Fixed
+{
+	/// <summary>
+    /// A line is a shape defined by exactly two points in space.
+    /// </summary>
+    public struct Line : IShape2D, System.IEquatable<Line>
+    {
+        public Vector2 Start { get; }
+        public Vector2 End { get; }
+
+        public AABB2D AABB { get; }
+
+		public IEnumerable<IShape2D> Shapes
+        {
+            get
+            {
+				yield return this;
+			}
+        }
+
+		public Line(Vector2 start, Vector2 end)
+        {
+            Start = start;
+            End = end;
+
+            AABB = new AABB2D(
+				Fix64.Min(Start.X, End.X),
+				Fix64.Min(Start.Y, End.Y),
+				Fix64.Max(Start.X, End.X),
+				Fix64.Max(Start.Y, End.Y)
+			);
+        }
+
+        public Vector2 Support(Vector2 direction, Transform2D transform)
+        {
+            var transformedStart = Vector2.Transform(Start, transform.TransformMatrix);
+            var transformedEnd = Vector2.Transform(End, transform.TransformMatrix);
+            return Vector2.Dot(transformedStart, direction) > Vector2.Dot(transformedEnd, direction) ?
+                transformedStart :
+                transformedEnd;
+        }
+
+        public AABB2D TransformedAABB(Transform2D transform)
+        {
+            return AABB2D.Transformed(AABB, transform);
+        }
+
+        public override bool Equals(object obj)
+        {
+            return obj is IShape2D other && Equals(other);
+        }
+
+        public bool Equals(IShape2D other)
+        {
+            return other is Line otherLine && Equals(otherLine);
+        }
+
+        public bool Equals(Line other)
+        {
+            return
+				(Start == other.Start && End == other.End) ||
+				(End == other.Start && Start == other.End);
+        }
+
+        public override int GetHashCode()
+        {
+            return System.HashCode.Combine(Start, End);
+        }
+
+        public static bool operator ==(Line a, Line b)
+        {
+            return a.Equals(b);
+        }
+
+        public static bool operator !=(Line a, Line b)
+        {
+            return !(a == b);
+        }
+    }
+}

src/Collision/Fixed/Shapes/Point.cs

@@ -0,0 +1,61 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Fixed;
+
+namespace MoonWorks.Collision.Fixed
+{
+	/// <summary>
+	/// A Point is "that which has no part".
+	/// All points by themselves are identical.
+	/// </summary>
+	public struct Point : IShape2D, System.IEquatable<Point>
+	{
+		public AABB2D AABB { get; }
+		public IEnumerable<IShape2D> Shapes
+        {
+            get
+            {
+				yield return this;
+			}
+        }
+
+		public AABB2D TransformedAABB(Transform2D transform)
+		{
+			return AABB2D.Transformed(AABB, transform);
+		}
+
+		public Vector2 Support(Vector2 direction, Transform2D transform)
+		{
+			return Vector2.Transform(Vector2.Zero, transform.TransformMatrix);
+		}
+
+		public override bool Equals(object obj)
+		{
+			return obj is IShape2D other && Equals(other);
+		}
+
+		public bool Equals(IShape2D other)
+		{
+			return other is Point otherPoint && Equals(otherPoint);
+		}
+
+		public bool Equals(Point other)
+		{
+			return true;
+		}
+
+		public override int GetHashCode()
+		{
+			return 0;
+		}
+
+		public static bool operator ==(Point a, Point b)
+		{
+			return true;
+		}
+
+		public static bool operator !=(Point a, Point b)
+		{
+			return false;
+		}
+	}
+}

src/Collision/Fixed/Shapes/Rectangle.cs

@@ -0,0 +1,130 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Fixed;
+
+namespace MoonWorks.Collision.Fixed
+{
+	/// <summary>
+	/// A rectangle is a shape defined by a width and height. The origin is the center of the rectangle.
+	/// </summary>
+	public struct Rectangle : IShape2D, System.IEquatable<Rectangle>
+	{
+		public AABB2D AABB { get; }
+		public Fix64 Width { get; }
+		public Fix64 Height { get; }
+
+		public Fix64 Right { get; }
+		public Fix64 Left { get; }
+		public Fix64 Top { get; }
+		public Fix64 Bottom { get; }
+		public Vector2 TopLeft { get; }
+		public Vector2 BottomRight { get; }
+
+		public Vector2 Min { get; }
+		public Vector2 Max { get; }
+
+		public IEnumerable<IShape2D> Shapes
+        {
+            get
+            {
+				yield return this;
+			}
+        }
+
+		public Rectangle(Fix64 left, Fix64 top, Fix64 width, Fix64 height)
+		{
+			Width = width;
+			Height = height;
+			Left = left;
+			Right = left + width;
+			Top = top;
+			Bottom = top + height;
+			AABB = new AABB2D(left, top, Right, Bottom);
+			TopLeft = new Vector2(Left, Top);
+			BottomRight = new Vector2(Right, Bottom);
+			Min = AABB.Min;
+			Max = AABB.Max;
+		}
+
+		public Rectangle(int left, int top, int width, int height)
+		{
+			Width = (Fix64) width;
+			Height = (Fix64) height;
+			Left = (Fix64) left;
+			Right = (Fix64) (left + width);
+			Top = (Fix64) top;
+			Bottom = (Fix64) (top + height);
+			AABB = new AABB2D(Left, Top, Right, Bottom);
+			TopLeft = new Vector2(Left, Top);
+			BottomRight = new Vector2(Right, Bottom);
+			Min = AABB.Min;
+			Max = AABB.Max;
+		}
+
+		private Vector2 Support(Vector2 direction)
+		{
+			if (direction.X >= Fix64.Zero && direction.Y >= Fix64.Zero)
+			{
+				return Max;
+			}
+			else if (direction.X >= Fix64.Zero && direction.Y < Fix64.Zero)
+			{
+				return new Vector2(Max.X, Min.Y);
+			}
+			else if (direction.X < Fix64.Zero && direction.Y >= Fix64.Zero)
+			{
+				return new Vector2(Min.X, Max.Y);
+			}
+			else if (direction.X < Fix64.Zero && direction.Y < Fix64.Zero)
+			{
+				return new Vector2(Min.X, Min.Y);
+			}
+			else
+			{
+				throw new System.ArgumentException("Support vector direction cannot be zero.");
+			}
+		}
+
+		public Vector2 Support(Vector2 direction, Transform2D transform)
+		{
+			Matrix3x2 inverseTransform;
+			Matrix3x2.Invert(transform.TransformMatrix, out inverseTransform);
+			var inverseDirection = Vector2.TransformNormal(direction, inverseTransform);
+			return Vector2.Transform(Support(inverseDirection), transform.TransformMatrix);
+		}
+
+		public AABB2D TransformedAABB(Transform2D transform)
+		{
+			return AABB2D.Transformed(AABB, transform);
+		}
+
+		public override bool Equals(object obj)
+		{
+			return obj is IShape2D other && Equals(other);
+		}
+
+		public bool Equals(IShape2D other)
+		{
+			return (other is Rectangle rectangle && Equals(rectangle));
+		}
+
+		public bool Equals(Rectangle other)
+		{
+			return Min == other.Min && Max == other.Max;
+		}
+
+		public override int GetHashCode()
+		{
+			return System.HashCode.Combine(Min, Max);
+		}
+
+		public static bool operator ==(Rectangle a, Rectangle b)
+		{
+			return a.Equals(b);
+		}
+
+		public static bool operator !=(Rectangle a, Rectangle b)
+		{
+			return !(a == b);
+		}
+	}
+}

src/Collision/Fixed/Simplex2D.cs

@@ -0,0 +1,136 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Fixed;
+
+namespace MoonWorks.Collision.Fixed
+{
+	/// <summary>
+	/// A simplex is a shape with up to n - 2 vertices in the nth dimension.
+	/// </summary>
+	public struct Simplex2D : System.IEquatable<Simplex2D>
+	{
+		private Vector2 a;
+		private Vector2? b;
+		private Vector2? c;
+
+		public Vector2 A => a;
+		public Vector2? B => b;
+		public Vector2? C => c;
+
+		public bool ZeroSimplex { get { return !b.HasValue && !c.HasValue; } }
+		public bool OneSimplex { get { return b.HasValue && !c.HasValue; } }
+		public bool TwoSimplex { get { return b.HasValue && c.HasValue; } }
+
+		public int Count => TwoSimplex ? 3 : (OneSimplex ? 2 : 1);
+
+		public Simplex2D(Vector2 a)
+		{
+			this.a = a;
+			b = null;
+			c = null;
+		}
+
+		public Simplex2D(Vector2 a, Vector2 b)
+		{
+			this.a = a;
+			this.b = b;
+			c = null;
+		}
+
+		public Simplex2D(Vector2 a, Vector2 b, Vector2 c)
+		{
+			this.a = a;
+			this.b = b;
+			this.c = c;
+		}
+
+		public Vector2 this[int index]
+		{
+			get
+			{
+				if (index == 0) { return a; }
+				if (index == 1) { return b.Value; }
+				if (index == 2) { return c.Value; }
+				throw new System.IndexOutOfRangeException();
+			}
+		}
+
+		public IEnumerable<Vector2> Vertices
+		{
+			get
+			{
+				yield return (Vector2) a;
+				if (b.HasValue) { yield return (Vector2) b; }
+				if (c.HasValue) { yield return (Vector2) c; }
+			}
+		}
+
+		public Vector2 Support(Vector2 direction, Transform2D transform)
+		{
+			var maxDotProduct = Fix64.MinValue;
+			var maxVertex = a;
+			foreach (var vertex in Vertices)
+			{
+				var transformed = Vector2.Transform(vertex, transform.TransformMatrix);
+				var dot = Vector2.Dot(transformed, direction);
+				if (dot > maxDotProduct)
+				{
+					maxVertex = transformed;
+					maxDotProduct = dot;
+				}
+			}
+			return maxVertex;
+		}
+
+		public void Insert(Vector2 point, int index)
+		{
+			if (index == 0)
+			{
+				c = b;
+				b = a;
+				a = point;
+			}
+			else if (index == 1)
+			{
+				c = b;
+				b = point;
+			}
+			else
+			{
+				c = point;
+			}
+		}
+
+		public override bool Equals(object obj)
+		{
+			return obj is Simplex2D other && Equals(other);
+		}
+
+		public bool Equals(Simplex2D other)
+		{
+			if (Count != other.Count) { return false; }
+
+			return
+				(A == other.A && B == other.B && C == other.C) ||
+				(A == other.A && B == other.C && C == other.B) ||
+				(A == other.B && B == other.A && C == other.C) ||
+				(A == other.B && B == other.C && C == other.A) ||
+				(A == other.C && B == other.A && C == other.B) ||
+				(A == other.C && B == other.B && C == other.A);
+		}
+
+		public override int GetHashCode()
+		{
+			return System.HashCode.Combine(Vertices);
+		}
+
+		public static bool operator ==(Simplex2D a, Simplex2D b)
+		{
+			return a.Equals(b);
+		}
+
+		public static bool operator !=(Simplex2D a, Simplex2D b)
+		{
+			return !(a == b);
+		}
+	}
+}

src/Collision/Fixed/SpatialHash2D.cs

@@ -0,0 +1,253 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Fixed;
+
+namespace MoonWorks.Collision.Fixed
+{
+	/// <summary>
+	/// Used to quickly check if two shapes are potentially overlapping.
+	/// </summary>
+	/// <typeparam name="T">The type that will be used to uniquely identify shape-transform pairs.</typeparam>
+	public class SpatialHash2D<T> where T : System.IEquatable<T>
+	{
+		private readonly Fix64 cellSize;
+
+		private readonly Dictionary<long, HashSet<T>> hashDictionary = new Dictionary<long, HashSet<T>>();
+		// FIXME: this ICollidable causes boxing which triggers garbage collection
+		private readonly Dictionary<T, (ICollidable, Transform2D, uint)> IDLookup = new Dictionary<T, (ICollidable, Transform2D, uint)>();
+
+		public int MinX { get; private set; } = 0;
+		public int MaxX { get; private set; } = 0;
+		public int MinY { get; private set; } = 0;
+		public int MaxY { get; private set; } = 0;
+
+		private Queue<HashSet<T>> hashSetPool = new Queue<HashSet<T>>();
+
+		public SpatialHash2D(int cellSize)
+		{
+			this.cellSize = new Fix64(cellSize);
+		}
+
+		private (int, int) Hash(Vector2 position)
+		{
+			return ((int) (position.X / cellSize), (int) (position.Y / cellSize));
+		}
+
+		/// <summary>
+		/// Inserts an element into the SpatialHash.
+		/// </summary>
+		/// <param name="id">A unique ID for the shape-transform pair.</param>
+		/// <param name="shape"></param>
+		/// <param name="transform2D"></param>
+		/// <param name="collisionGroups">A bitmask value specifying the groups this object belongs to.</param>
+		public void Insert(T id, ICollidable shape, Transform2D transform2D, uint collisionGroups = uint.MaxValue)
+		{
+			var box = shape.TransformedAABB(transform2D);
+			var minHash = Hash(box.Min);
+			var maxHash = Hash(box.Max);
+
+			foreach (var key in Keys(minHash.Item1, minHash.Item2, maxHash.Item1, maxHash.Item2))
+			{
+				if (!hashDictionary.ContainsKey(key))
+				{
+					hashDictionary.Add(key, new HashSet<T>());
+				}
+
+				hashDictionary[key].Add(id);
+				IDLookup[id] = (shape, transform2D, collisionGroups);
+			}
+
+			MinX = System.Math.Min(MinX, minHash.Item1);
+			MinY = System.Math.Min(MinY, minHash.Item2);
+			MaxX = System.Math.Max(MaxX, maxHash.Item1);
+			MaxY = System.Math.Max(MaxY, maxHash.Item2);
+		}
+
+		/// <summary>
+		/// Retrieves all the potential collisions of a shape-transform pair. Excludes any shape-transforms with the given ID.
+		/// </summary>
+		public IEnumerable<(T, ICollidable, Transform2D, uint)> Retrieve(T id, ICollidable shape, Transform2D transform2D, uint collisionMask = uint.MaxValue)
+		{
+			var returned = AcquireHashSet();
+
+			var box = shape.TransformedAABB(transform2D);
+			var (minX, minY) = Hash(box.Min);
+			var (maxX, maxY) = Hash(box.Max);
+
+			if (minX < MinX) { minX = MinX; }
+			if (maxX > MaxX) { maxX = MaxX; }
+			if (minY < MinY) { minY = MinY; }
+			if (maxY > MaxY) { maxY = MaxY; }
+
+			foreach (var key in Keys(minX, minY, maxX, maxY))
+			{
+				if (hashDictionary.ContainsKey(key))
+				{
+					foreach (var t in hashDictionary[key])
+					{
+						if (!returned.Contains(t))
+						{
+							var (otherShape, otherTransform, collisionGroups) = IDLookup[t];
+							if (!id.Equals(t) && ((collisionGroups & collisionMask) > 0) && AABB2D.TestOverlap(box, otherShape.TransformedAABB(otherTransform)))
+							{
+								returned.Add(t);
+								yield return (t, otherShape, otherTransform, collisionGroups);
+							}
+						}
+					}
+				}
+			}
+
+			FreeHashSet(returned);
+		}
+
+		/// <summary>
+		/// Retrieves all the potential collisions of a shape-transform pair.
+		/// </summary>
+		public IEnumerable<(T, ICollidable, Transform2D, uint)> Retrieve(ICollidable shape, Transform2D transform2D, uint collisionMask = uint.MaxValue)
+		{
+			var returned = AcquireHashSet();
+
+			var box = shape.TransformedAABB(transform2D);
+			var (minX, minY) = Hash(box.Min);
+			var (maxX, maxY) = Hash(box.Max);
+
+			if (minX < MinX) { minX = MinX; }
+			if (maxX > MaxX) { maxX = MaxX; }
+			if (minY < MinY) { minY = MinY; }
+			if (maxY > MaxY) { maxY = MaxY; }
+
+			foreach (var key in Keys(minX, minY, maxX, maxY))
+			{
+				if (hashDictionary.ContainsKey(key))
+				{
+					foreach (var t in hashDictionary[key])
+					{
+						if (!returned.Contains(t))
+						{
+							var (otherShape, otherTransform, collisionGroups) = IDLookup[t];
+							if (((collisionGroups & collisionMask) > 0) && AABB2D.TestOverlap(box, otherShape.TransformedAABB(otherTransform)))
+							{
+								returned.Add(t);
+								yield return (t, otherShape, otherTransform, collisionGroups);
+							}
+						}
+					}
+				}
+			}
+
+			FreeHashSet(returned);
+		}
+
+		/// <summary>
+		/// Retrieves objects based on a pre-transformed AABB.
+		/// </summary>
+		/// <param name="aabb">A transformed AABB.</param>
+		/// <returns></returns>
+		public IEnumerable<(T, ICollidable, Transform2D, uint)> Retrieve(AABB2D aabb, uint collisionMask = uint.MaxValue)
+		{
+			var returned = AcquireHashSet();
+
+			var (minX, minY) = Hash(aabb.Min);
+			var (maxX, maxY) = Hash(aabb.Max);
+
+			if (minX < MinX) { minX = MinX; }
+			if (maxX > MaxX) { maxX = MaxX; }
+			if (minY < MinY) { minY = MinY; }
+			if (maxY > MaxY) { maxY = MaxY; }
+
+			foreach (var key in Keys(minX, minY, maxX, maxY))
+			{
+				if (hashDictionary.ContainsKey(key))
+				{
+					foreach (var t in hashDictionary[key])
+					{
+						if (!returned.Contains(t))
+						{
+							var (otherShape, otherTransform, collisionGroups) = IDLookup[t];
+							if (((collisionGroups & collisionMask) > 0) && AABB2D.TestOverlap(aabb, otherShape.TransformedAABB(otherTransform)))
+							{
+								yield return (t, otherShape, otherTransform, collisionGroups);
+							}
+						}
+					}
+				}
+			}
+
+			FreeHashSet(returned);
+		}
+
+		public void Update(T id, ICollidable shape, Transform2D transform2D, uint collisionGroups = uint.MaxValue)
+		{
+			Remove(id);
+			Insert(id, shape, transform2D, collisionGroups);
+		}
+
+		/// <summary>
+		/// Removes a specific ID from the SpatialHash.
+		/// </summary>
+		public void Remove(T id)
+		{
+			var (shape, transform, collisionGroups) = IDLookup[id];
+
+			var box = shape.TransformedAABB(transform);
+			var minHash = Hash(box.Min);
+			var maxHash = Hash(box.Max);
+
+			foreach (var key in Keys(minHash.Item1, minHash.Item2, maxHash.Item1, maxHash.Item2))
+			{
+				if (hashDictionary.ContainsKey(key))
+				{
+					hashDictionary[key].Remove(id);
+				}
+			}
+
+			IDLookup.Remove(id);
+		}
+
+		/// <summary>
+		/// Removes everything that has been inserted into the SpatialHash.
+		/// </summary>
+		public void Clear()
+		{
+			foreach (var hash in hashDictionary.Values)
+			{
+				hash.Clear();
+			}
+
+			IDLookup.Clear();
+		}
+
+		private static long MakeLong(int left, int right)
+		{
+			return ((long) left << 32) | ((uint) right);
+		}
+
+		private IEnumerable<long> Keys(int minX, int minY, int maxX, int maxY)
+		{
+			for (var i = minX; i <= maxX; i++)
+			{
+				for (var j = minY; j <= maxY; j++)
+				{
+					yield return MakeLong(i, j);
+				}
+			}
+		}
+
+		private HashSet<T> AcquireHashSet()
+		{
+			if (hashSetPool.Count == 0)
+			{
+				hashSetPool.Enqueue(new HashSet<T>());
+			}
+
+			var hashSet = hashSetPool.Dequeue();
+			hashSet.Clear();
+			return hashSet;
+		}
+
+		private void FreeHashSet(HashSet<T> hashSet)
+		{
+			hashSetPool.Enqueue(hashSet);
+		}
+	}
+}

src/Collision/Float/AABB2D.cs

@@ -0,0 +1,174 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Float;
+
+namespace MoonWorks.Collision.Float
+{
+	/// <summary>
+	/// Axis-aligned bounding box.
+	/// </summary>
+	public struct AABB2D : System.IEquatable<AABB2D>
+	{
+		/// <summary>
+		/// The top-left position of the AABB.
+		/// </summary>
+		/// <value></value>
+		public Vector2 Min { get; private set; }
+
+		/// <summary>
+		/// The bottom-right position of the AABB.
+		/// </summary>
+		/// <value></value>
+		public Vector2 Max { get; private set; }
+
+		public float Width { get { return Max.X - Min.X; } }
+		public float Height { get { return Max.Y - Min.Y; } }
+
+		public float Right { get { return Max.X; } }
+		public float Left { get { return Min.X; } }
+
+		/// <summary>
+		/// The top of the AABB. Assumes a downward-aligned Y axis, so this value will be smaller than Bottom.
+		/// </summary>
+		/// <value></value>
+		public float Top { get { return Min.Y; } }
+
+		/// <summary>
+		/// The bottom of the AABB. Assumes a downward-aligned Y axis, so this value will be larger than Top.
+		/// </summary>
+		/// <value></value>
+		public float Bottom { get { return Max.Y; } }
+
+		public AABB2D(float minX, float minY, float maxX, float maxY)
+		{
+			Min = new Vector2(minX, minY);
+			Max = new Vector2(maxX, maxY);
+		}
+
+		public AABB2D(Vector2 min, Vector2 max)
+		{
+			Min = min;
+			Max = max;
+		}
+
+		private static Matrix3x2 AbsoluteMatrix(Matrix3x2 matrix)
+		{
+			return new Matrix3x2
+			(
+				System.Math.Abs(matrix.M11), System.Math.Abs(matrix.M12),
+				System.Math.Abs(matrix.M21), System.Math.Abs(matrix.M22),
+				System.Math.Abs(matrix.M31), System.Math.Abs(matrix.M32)
+			);
+		}
+
+		/// <summary>
+		/// Efficiently transforms the AABB by a Transform2D.
+		/// </summary>
+		/// <param name="aabb"></param>
+		/// <param name="transform"></param>
+		/// <returns></returns>
+		public static AABB2D Transformed(AABB2D aabb, Transform2D transform)
+		{
+            var center = (aabb.Min + aabb.Max) / 2f;
+            var extent = (aabb.Max - aabb.Min) / 2f;
+
+            var newCenter = Vector2.Transform(center, transform.TransformMatrix);
+            var newExtent = Vector2.TransformNormal(extent, AbsoluteMatrix(transform.TransformMatrix));
+
+            return new AABB2D(newCenter - newExtent, newCenter + newExtent);
+		}
+
+		public AABB2D Compose(AABB2D aabb)
+		{
+			float left = Left;
+			float top = Top;
+			float right = Right;
+			float bottom = Bottom;
+
+			if (aabb.Left < left)
+			{
+				left = aabb.Left;
+			}
+			if (aabb.Right > right)
+			{
+				right = aabb.Right;
+			}
+			if (aabb.Top < top)
+			{
+				top = aabb.Top;
+			}
+			if (aabb.Bottom > bottom)
+			{
+				bottom = aabb.Bottom;
+			}
+
+			return new AABB2D(left, top, right, bottom);
+		}
+
+		/// <summary>
+		/// Creates an AABB for an arbitrary collection of positions.
+		/// This is less efficient than defining a custom AABB method for most shapes, so avoid using this if possible.
+		/// </summary>
+		/// <param name="vertices"></param>
+		/// <returns></returns>
+		public static AABB2D FromVertices(IEnumerable<Vector2> vertices)
+		{
+			var minX = float.MaxValue;
+			var minY = float.MaxValue;
+			var maxX = float.MinValue;
+			var maxY = float.MinValue;
+
+			foreach (var vertex in vertices)
+			{
+				if (vertex.X < minX)
+				{
+					minX = vertex.X;
+				}
+				if (vertex.Y < minY)
+				{
+					minY = vertex.Y;
+				}
+				if (vertex.X > maxX)
+				{
+					maxX = vertex.X;
+				}
+				if (vertex.Y > maxY)
+				{
+					maxY = vertex.Y;
+				}
+			}
+
+			return new AABB2D(minX, minY, maxX, maxY);
+		}
+
+		public static bool TestOverlap(AABB2D a, AABB2D b)
+		{
+			return a.Left < b.Right && a.Right > b.Left && a.Top < b.Bottom && a.Bottom > b.Top;
+		}
+
+		public override bool Equals(object obj)
+		{
+			return obj is AABB2D aabb && Equals(aabb);
+		}
+
+		public bool Equals(AABB2D other)
+		{
+			return Min == other.Min &&
+				   Max == other.Max;
+		}
+
+		public override int GetHashCode()
+		{
+			return System.HashCode.Combine(Min, Max);
+		}
+
+		public static bool operator ==(AABB2D left, AABB2D right)
+		{
+			return left.Equals(right);
+		}
+
+		public static bool operator !=(AABB2D left, AABB2D right)
+		{
+			return !(left == right);
+		}
+	}
+}

src/Collision/Float/ICollidable.cs

@@ -0,0 +1,12 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Float;
+
+namespace MoonWorks.Collision.Float
+{
+	public interface ICollidable
+	{
+		IEnumerable<IShape2D> Shapes { get; }
+		AABB2D AABB { get; }
+		AABB2D TransformedAABB(Transform2D transform);
+	}
+}

src/Collision/Float/IShape2D.cs

@@ -0,0 +1,15 @@
+using MoonWorks.Math.Float;
+
+namespace MoonWorks.Collision.Float
+{
+	public interface IShape2D : ICollidable, System.IEquatable<IShape2D>
+	{
+		/// <summary>
+		/// A Minkowski support function. Gives the farthest point on the edge of a shape along the given direction.
+		/// </summary>
+		/// <param name="direction">A normalized Vector2.</param>
+		/// <param name="transform">A Transform for transforming the shape vertices.</param>
+		/// <returns>The farthest point on the edge of the shape along the given direction.</returns>
+		Vector2 Support(Vector2 direction, Transform2D transform);
+	}
+}

src/Collision/Float/MinkowskiDifference.cs

@@ -0,0 +1,57 @@
+using MoonWorks.Math.Float;
+
+namespace MoonWorks.Collision.Float
+{
+	/// <summary>
+	/// A Minkowski difference between two shapes.
+	/// </summary>
+	public struct MinkowskiDifference : System.IEquatable<MinkowskiDifference>
+	{
+		private IShape2D ShapeA { get; }
+		private Transform2D TransformA { get; }
+		private IShape2D ShapeB { get; }
+		private Transform2D TransformB { get; }
+
+		public MinkowskiDifference(IShape2D shapeA, Transform2D transformA, IShape2D shapeB, Transform2D transformB)
+		{
+			ShapeA = shapeA;
+			TransformA = transformA;
+			ShapeB = shapeB;
+			TransformB = transformB;
+		}
+
+		public Vector2 Support(Vector2 direction)
+		{
+			return ShapeA.Support(direction, TransformA) - ShapeB.Support(-direction, TransformB);
+		}
+
+		public override bool Equals(object other)
+		{
+			return other is MinkowskiDifference minkowskiDifference && Equals(minkowskiDifference);
+		}
+
+		public bool Equals(MinkowskiDifference other)
+		{
+			return
+				ShapeA == other.ShapeA &&
+				TransformA == other.TransformA &&
+				ShapeB == other.ShapeB &&
+				TransformB == other.TransformB;
+		}
+
+		public override int GetHashCode()
+		{
+			return System.HashCode.Combine(ShapeA, TransformA, ShapeB, TransformB);
+		}
+
+		public static bool operator ==(MinkowskiDifference a, MinkowskiDifference b)
+		{
+			return a.Equals(b);
+		}
+
+		public static bool operator !=(MinkowskiDifference a, MinkowskiDifference b)
+		{
+			return !(a == b);
+		}
+	}
+}

src/Collision/Float/NarrowPhase.cs

@@ -0,0 +1,331 @@
+using MoonWorks.Math.Float;
+
+namespace MoonWorks.Collision.Float
+{
+	public static class NarrowPhase
+	{
+		private struct Edge
+		{
+			public float Distance;
+			public Vector2 Normal;
+			public int Index;
+		}
+
+        public static bool TestCollision(ICollidable collidableA, Transform2D transformA, ICollidable collidableB, Transform2D transformB)
+        {
+            foreach (var shapeA in collidableA.Shapes)
+            {
+                foreach (var shapeB in collidableB.Shapes)
+                {
+					if (TestCollision(shapeA, transformA, shapeB, transformB))
+                    {
+						return true;
+					}
+				}
+            }
+
+			return false;
+		}
+
+		public static bool TestCollision(IShape2D shapeA, Transform2D transformA, IShape2D shapeB, Transform2D transformB)
+		{
+			// If we can use a fast path check, let's do that!
+			if (shapeA is Rectangle rectangleA && shapeB is Rectangle rectangleB && transformA.IsAxisAligned && transformB.IsAxisAligned)
+			{
+				return TestRectangleOverlap(rectangleA, transformA, rectangleB, transformB);
+			}
+			else if (shapeA is Point && shapeB is Rectangle && transformB.IsAxisAligned)
+			{
+				return TestPointRectangleOverlap((Point) shapeA, transformA, (Rectangle) shapeB, transformB);
+			}
+			else if (shapeA is Rectangle && shapeB is Point && transformA.IsAxisAligned)
+			{
+				return TestPointRectangleOverlap((Point) shapeB, transformB, (Rectangle) shapeA, transformA);
+			}
+			else if (shapeA is Rectangle && shapeB is Circle && transformA.IsAxisAligned && transformB.IsUniformScale)
+			{
+				return TestCircleRectangleOverlap((Circle) shapeB, transformB, (Rectangle) shapeA, transformA);
+			}
+			else if (shapeA is Circle && shapeB is Rectangle && transformA.IsUniformScale && transformB.IsAxisAligned)
+			{
+				return TestCircleRectangleOverlap((Circle) shapeA, transformA, (Rectangle) shapeB, transformB);
+			}
+			else if (shapeA is Circle && shapeB is Point && transformA.IsUniformScale)
+			{
+				return TestCirclePointOverlap((Circle) shapeA, transformA, (Point) shapeB, transformB);
+			}
+			else if (shapeA is Point && shapeB is Circle && transformB.IsUniformScale)
+			{
+				return TestCirclePointOverlap((Circle) shapeB, transformB, (Point) shapeA, transformA);
+			}
+			else if (shapeA is Circle circleA && shapeB is Circle circleB && transformA.IsUniformScale && transformB.IsUniformScale)
+			{
+				return TestCircleOverlap(circleA, transformA, circleB, transformB);
+			}
+
+			// Sad, we can't do a fast path optimization. Time for a simplex reduction.
+			return FindCollisionSimplex(shapeA, transformA, shapeB, transformB).Item1;
+		}
+
+		public static bool TestRectangleOverlap(Rectangle rectangleA, Transform2D transformA, Rectangle rectangleB, Transform2D transformB)
+		{
+			var firstAABB = rectangleA.TransformedAABB(transformA);
+			var secondAABB = rectangleB.TransformedAABB(transformB);
+
+			return firstAABB.Left < secondAABB.Right && firstAABB.Right > secondAABB.Left && firstAABB.Top < secondAABB.Bottom && firstAABB.Bottom > secondAABB.Top;
+		}
+
+		public static bool TestPointRectangleOverlap(Point point, Transform2D pointTransform, Rectangle rectangle, Transform2D rectangleTransform)
+		{
+			var transformedPoint = pointTransform.Position;
+			var AABB = rectangle.TransformedAABB(rectangleTransform);
+
+			return transformedPoint.X > AABB.Left && transformedPoint.X < AABB.Right && transformedPoint.Y < AABB.Bottom && transformedPoint.Y > AABB.Top;
+		}
+
+		public static bool TestCirclePointOverlap(Circle circle, Transform2D circleTransform, Point point, Transform2D pointTransform)
+		{
+			var circleCenter = circleTransform.Position;
+			var circleRadius = circle.Radius * circleTransform.Scale.X;
+
+			var distanceX = circleCenter.X - pointTransform.Position.X;
+			var distanceY = circleCenter.Y - pointTransform.Position.Y;
+
+			return (distanceX * distanceX) + (distanceY * distanceY) < (circleRadius * circleRadius);
+		}
+
+		/// <summary>
+		/// NOTE: The rectangle must be axis aligned, and the scaling of the circle must be uniform.
+		/// </summary>
+		public static bool TestCircleRectangleOverlap(Circle circle, Transform2D circleTransform, Rectangle rectangle, Transform2D rectangleTransform)
+		{
+			var circleCenter = circleTransform.Position;
+			var circleRadius = circle.Radius * circleTransform.Scale.X;
+			var AABB = rectangle.TransformedAABB(rectangleTransform);
+
+			var closestX = Math.MathHelper.Clamp(circleCenter.X, AABB.Left, AABB.Right);
+			var closestY = Math.MathHelper.Clamp(circleCenter.Y, AABB.Top, AABB.Bottom);
+
+			var distanceX = circleCenter.X - closestX;
+			var distanceY = circleCenter.Y - closestY;
+
+			var distanceSquared = (distanceX * distanceX) + (distanceY * distanceY);
+			return distanceSquared < (circleRadius * circleRadius);
+		}
+
+		public static bool TestCircleOverlap(Circle circleA, Transform2D transformA, Circle circleB, Transform2D transformB)
+		{
+			var radiusA = circleA.Radius * transformA.Scale.X;
+			var radiusB = circleB.Radius * transformB.Scale.Y;
+
+			var centerA = transformA.Position;
+			var centerB = transformB.Position;
+
+			var distanceSquared = (centerA - centerB).LengthSquared();
+			var radiusSumSquared = (radiusA + radiusB) * (radiusA + radiusB);
+
+			return distanceSquared < radiusSumSquared;
+		}
+
+		public static (bool, Simplex2D) FindCollisionSimplex(IShape2D shapeA, Transform2D transformA, IShape2D shapeB, Transform2D transformB)
+		{
+			var minkowskiDifference = new MinkowskiDifference(shapeA, transformA, shapeB, transformB);
+			var c = minkowskiDifference.Support(Vector2.UnitX);
+			var b = minkowskiDifference.Support(-Vector2.UnitX);
+			return Check(minkowskiDifference, c, b);
+		}
+
+        public unsafe static Vector2 Intersect(IShape2D shapeA, Transform2D Transform2DA, IShape2D shapeB, Transform2D Transform2DB, Simplex2D simplex)
+        {
+            if (shapeA == null) { throw new System.ArgumentNullException(nameof(shapeA)); }
+            if (shapeB == null) { throw new System.ArgumentNullException(nameof(shapeB)); }
+            if (!simplex.TwoSimplex) { throw new System.ArgumentException("Simplex must be a 2-Simplex.", nameof(simplex)); }
+
+            var a = simplex.A;
+            var b = simplex.B.Value;
+            var c = simplex.C.Value;
+
+            Vector2 intersection = default;
+
+            for (var i = 0; i < 32; i++)
+            {
+                var edge = FindClosestEdge(simplex);
+                var support = CalculateSupport(shapeA, Transform2DA, shapeB, Transform2DB, edge.Normal);
+                var distance = Vector2.Dot(support, edge.Normal);
+
+                intersection = edge.Normal;
+                intersection *= distance;
+
+                if (System.Math.Abs(distance - edge.Distance) <= 0.00001f)
+                {
+                    return intersection;
+                }
+                else
+                {
+					simplex.Insert(support, edge.Index);
+                }
+            }
+
+            return intersection; // close enough
+        }
+
+        private static unsafe Edge FindClosestEdge(Simplex2D simplex)
+        {
+            var closestDistance = float.PositiveInfinity;
+            var closestNormal = Vector2.Zero;
+            var closestIndex = 0;
+
+			for (var i = 0; i < 4; i += 1)
+			{
+				var j = (i + 1 == 3) ? 0 : i + 1;
+
+				var a = simplex[i];
+				var b = simplex[j];
+
+				var e = b - a;
+
+				var oa = a;
+
+				var n = Vector2.Normalize(TripleProduct(e, oa, e));
+
+				var d = Vector2.Dot(n, a);
+
+				if (d < closestDistance)
+				{
+					closestDistance = d;
+					closestNormal = n;
+					closestIndex = j;
+				}
+			}
+
+            return new Edge
+			{
+				Distance = closestDistance,
+				Normal = closestNormal,
+				Index = closestIndex
+			};
+        }
+
+        private static Vector2 CalculateSupport(IShape2D shapeA, Transform2D Transform2DA, IShape2D shapeB, Transform2D Transform2DB, Vector2 direction)
+        {
+            return shapeA.Support(direction, Transform2DA) - shapeB.Support(-direction, Transform2DB);
+        }
+
+		private static (bool, Simplex2D) Check(MinkowskiDifference minkowskiDifference, Vector2 c, Vector2 b)
+        {
+            var cb = c - b;
+            var c0 = -c;
+            var d = Direction(cb, c0);
+            return DoSimplex(minkowskiDifference, new Simplex2D(b, c), d);
+        }
+
+        private static (bool, Simplex2D) DoSimplex(MinkowskiDifference minkowskiDifference, Simplex2D simplex, Vector2 direction)
+        {
+            var a = minkowskiDifference.Support(direction);
+            var notPastOrigin = Vector2.Dot(a, direction) < 0;
+            var (intersects, newSimplex, newDirection) = EnclosesOrigin(a, simplex);
+
+            if (notPastOrigin)
+            {
+                return (false, default(Simplex2D));
+            }
+            else if (intersects)
+            {
+                return (true, new Simplex2D(simplex.A, simplex.B.Value, a));
+            }
+            else
+            {
+                return DoSimplex(minkowskiDifference, newSimplex, newDirection);
+            }
+        }
+
+        private static (bool, Simplex2D, Vector2) EnclosesOrigin(Vector2 a, Simplex2D simplex)
+        {
+            if (simplex.ZeroSimplex)
+            {
+                return HandleZeroSimplex(a, simplex.A);
+            }
+            else if (simplex.OneSimplex)
+            {
+                return HandleOneSimplex(a, simplex.A, simplex.B.Value);
+            }
+            else
+            {
+                return (false, simplex, Vector2.Zero);
+            }
+        }
+
+        private static (bool, Simplex2D, Vector2) HandleZeroSimplex(Vector2 a, Vector2 b)
+        {
+            var ab = b - a;
+            var a0 = -a;
+            var (newSimplex, newDirection) = SameDirection(ab, a0) ? (new Simplex2D(a, b), Perpendicular(ab, a0)) : (new Simplex2D(a), a0);
+            return (false, newSimplex, newDirection);
+        }
+
+        private static (bool, Simplex2D, Vector2) HandleOneSimplex(Vector2 a, Vector2 b, Vector2 c)
+        {
+            var a0 = -a;
+            var ab = b - a;
+            var ac = c - a;
+            var abp = Perpendicular(ab, -ac);
+            var acp = Perpendicular(ac, -ab);
+
+            if (SameDirection(abp, a0))
+            {
+                if (SameDirection(ab, a0))
+                {
+                    return (false, new Simplex2D(a, b), abp);
+                }
+                else
+                {
+                    return (false, new Simplex2D(a), a0);
+                }
+            }
+            else if (SameDirection(acp, a0))
+            {
+                if (SameDirection(ac, a0))
+                {
+                    return (false, new Simplex2D(a, c), acp);
+                }
+                else
+                {
+                    return (false, new Simplex2D(a), a0);
+                }
+            }
+            else
+            {
+                return (true, new Simplex2D(b, c), a0);
+            }
+        }
+
+        private static Vector2 TripleProduct(Vector2 a, Vector2 b, Vector2 c)
+        {
+            var A = new Vector3(a.X, a.Y, 0);
+            var B = new Vector3(b.X, b.Y, 0);
+            var C = new Vector3(c.X, c.Y, 0);
+
+            var first = Vector3.Cross(A, B);
+            var second = Vector3.Cross(first, C);
+
+            return new Vector2(second.X, second.Y);
+        }
+
+        private static Vector2 Direction(Vector2 a, Vector2 b)
+        {
+            var d = TripleProduct(a, b, a);
+            var collinear = d == Vector2.Zero;
+            return collinear ? new Vector2(a.Y, -a.X) : d;
+        }
+
+        private static bool SameDirection(Vector2 a, Vector2 b)
+        {
+            return Vector2.Dot(a, b) > 0;
+        }
+
+        private static Vector2 Perpendicular(Vector2 a, Vector2 b)
+        {
+            return TripleProduct(a, b, a);
+        }
+	}
+}

src/Collision/Float/Shapes/Circle.cs

@@ -0,0 +1,67 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Float;
+
+namespace MoonWorks.Collision.Float
+{
+	/// <summary>
+	/// A Circle is a shape defined by a radius.
+	/// </summary>
+	public struct Circle : IShape2D, System.IEquatable<Circle>
+	{
+		public float Radius { get; }
+		public AABB2D AABB { get; }
+		public IEnumerable<IShape2D> Shapes
+		{
+			get
+			{
+				yield return this;
+			}
+		}
+
+		public Circle(float radius)
+		{
+			Radius = radius;
+			AABB = new AABB2D(-Radius, -Radius, Radius, Radius);
+		}
+
+		public Vector2 Support(Vector2 direction, Transform2D transform)
+		{
+			return Vector2.Transform(Vector2.Normalize(direction) * Radius, transform.TransformMatrix);
+		}
+
+		public AABB2D TransformedAABB(Transform2D transform2D)
+		{
+			return AABB2D.Transformed(AABB, transform2D);
+		}
+
+		public override bool Equals(object obj)
+		{
+			return obj is IShape2D other && Equals(other);
+		}
+
+		public bool Equals(IShape2D other)
+		{
+			return other is Circle circle && Equals(circle);
+		}
+
+		public bool Equals(Circle other)
+		{
+			return Radius == other.Radius;
+		}
+
+		public override int GetHashCode()
+		{
+			return System.HashCode.Combine(Radius);
+		}
+
+		public static bool operator ==(Circle a, Circle b)
+		{
+			return a.Equals(b);
+		}
+
+		public static bool operator !=(Circle a, Circle b)
+		{
+			return !(a == b);
+		}
+	}
+}

src/Collision/Float/Shapes/Line.cs

@@ -0,0 +1,83 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Float;
+
+namespace MoonWorks.Collision.Float
+{
+	/// <summary>
+    /// A line is a shape defined by exactly two points in space.
+    /// </summary>
+    public struct Line : IShape2D, System.IEquatable<Line>
+    {
+        public Vector2 Start { get; }
+        public Vector2 End { get; }
+
+        public AABB2D AABB { get; }
+
+		public IEnumerable<IShape2D> Shapes
+        {
+            get
+            {
+				yield return this;
+			}
+        }
+
+		public Line(Vector2 start, Vector2 end)
+        {
+            Start = start;
+            End = end;
+
+            AABB = new AABB2D(
+				System.Math.Min(Start.X, End.X),
+				System.Math.Min(Start.Y, End.Y),
+				System.Math.Max(Start.X, End.X),
+				System.Math.Max(Start.Y, End.Y)
+			);
+        }
+
+        public Vector2 Support(Vector2 direction, Transform2D transform)
+        {
+            var transformedStart = Vector2.Transform(Start, transform.TransformMatrix);
+            var transformedEnd = Vector2.Transform(End, transform.TransformMatrix);
+            return Vector2.Dot(transformedStart, direction) > Vector2.Dot(transformedEnd, direction) ?
+                transformedStart :
+                transformedEnd;
+        }
+
+        public AABB2D TransformedAABB(Transform2D transform)
+        {
+            return AABB2D.Transformed(AABB, transform);
+        }
+
+        public override bool Equals(object obj)
+        {
+            return obj is IShape2D other && Equals(other);
+        }
+
+        public bool Equals(IShape2D other)
+        {
+            return other is Line otherLine && Equals(otherLine);
+        }
+
+        public bool Equals(Line other)
+        {
+            return
+				(Start == other.Start && End == other.End) ||
+				(End == other.Start && Start == other.End);
+        }
+
+        public override int GetHashCode()
+        {
+            return System.HashCode.Combine(Start, End);
+        }
+
+        public static bool operator ==(Line a, Line b)
+        {
+            return a.Equals(b);
+        }
+
+        public static bool operator !=(Line a, Line b)
+        {
+            return !(a == b);
+        }
+    }
+}

src/Collision/Float/Shapes/Point.cs

@@ -0,0 +1,61 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Float;
+
+namespace MoonWorks.Collision.Float
+{
+	/// <summary>
+	/// A Point is "that which has no part".
+	/// All points by themselves are identical.
+	/// </summary>
+	public struct Point : IShape2D, System.IEquatable<Point>
+	{
+		public AABB2D AABB { get; }
+		public IEnumerable<IShape2D> Shapes
+        {
+            get
+            {
+				yield return this;
+			}
+        }
+
+		public AABB2D TransformedAABB(Transform2D transform)
+		{
+			return AABB2D.Transformed(AABB, transform);
+		}
+
+		public Vector2 Support(Vector2 direction, Transform2D transform)
+		{
+			return Vector2.Transform(Vector2.Zero, transform.TransformMatrix);
+		}
+
+		public override bool Equals(object obj)
+		{
+			return obj is IShape2D other && Equals(other);
+		}
+
+		public bool Equals(IShape2D other)
+		{
+			return other is Point otherPoint && Equals(otherPoint);
+		}
+
+		public bool Equals(Point other)
+		{
+			return true;
+		}
+
+		public override int GetHashCode()
+		{
+			return 0;
+		}
+
+		public static bool operator ==(Point a, Point b)
+		{
+			return true;
+		}
+
+		public static bool operator !=(Point a, Point b)
+		{
+			return false;
+		}
+	}
+}

src/Collision/Float/Shapes/Rectangle.cs

@@ -0,0 +1,115 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Float;
+
+namespace MoonWorks.Collision.Float
+{
+	/// <summary>
+	/// A rectangle is a shape defined by a width and height. The origin is the center of the rectangle.
+	/// </summary>
+	public struct Rectangle : IShape2D, System.IEquatable<Rectangle>
+	{
+		public AABB2D AABB { get; }
+		public float Width { get; }
+		public float Height { get; }
+
+		public float Right { get; }
+		public float Left { get; }
+		public float Top { get; }
+		public float Bottom { get; }
+		public Vector2 TopLeft { get; }
+		public Vector2 BottomRight { get; }
+
+		public Vector2 Min { get; }
+		public Vector2 Max { get; }
+
+		public IEnumerable<IShape2D> Shapes
+        {
+            get
+            {
+				yield return this;
+			}
+        }
+
+		public Rectangle(float left, float top, float width, float height)
+		{
+			Width = width;
+			Height = height;
+			Left = left;
+			Right = left + width;
+			Top = top;
+			Bottom = top + height;
+			AABB = new AABB2D(left, top, Right, Bottom);
+			TopLeft = new Vector2(Left, Top);
+			BottomRight = new Vector2(Right, Bottom);
+			Min = AABB.Min;
+			Max = AABB.Max;
+		}
+
+		private Vector2 Support(Vector2 direction)
+		{
+			if (direction.X >= 0 && direction.Y >= 0)
+			{
+				return Max;
+			}
+			else if (direction.X >= 0 && direction.Y < 0)
+			{
+				return new Vector2(Max.X, Min.Y);
+			}
+			else if (direction.X < 0 && direction.Y >= 0)
+			{
+				return new Vector2(Min.X, Max.Y);
+			}
+			else if (direction.X < 0 && direction.Y < 0)
+			{
+				return new Vector2(Min.X, Min.Y);
+			}
+			else
+			{
+				throw new System.ArgumentException("Support vector direction cannot be zero.");
+			}
+		}
+
+		public Vector2 Support(Vector2 direction, Transform2D transform)
+		{
+			Matrix3x2 inverseTransform;
+			Matrix3x2.Invert(transform.TransformMatrix, out inverseTransform);
+			var inverseDirection = Vector2.TransformNormal(direction, inverseTransform);
+			return Vector2.Transform(Support(inverseDirection), transform.TransformMatrix);
+		}
+
+		public AABB2D TransformedAABB(Transform2D transform)
+		{
+			return AABB2D.Transformed(AABB, transform);
+		}
+
+		public override bool Equals(object obj)
+		{
+			return obj is IShape2D other && Equals(other);
+		}
+
+		public bool Equals(IShape2D other)
+		{
+			return (other is Rectangle rectangle && Equals(rectangle));
+		}
+
+		public bool Equals(Rectangle other)
+		{
+			return Min == other.Min && Max == other.Max;
+		}
+
+		public override int GetHashCode()
+		{
+			return System.HashCode.Combine(Min, Max);
+		}
+
+		public static bool operator ==(Rectangle a, Rectangle b)
+		{
+			return a.Equals(b);
+		}
+
+		public static bool operator !=(Rectangle a, Rectangle b)
+		{
+			return !(a == b);
+		}
+	}
+}

src/Collision/Float/Simplex2D.cs

@@ -0,0 +1,136 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Float;
+
+namespace MoonWorks.Collision.Float
+{
+	/// <summary>
+	/// A simplex is a shape with up to n - 2 vertices in the nth dimension.
+	/// </summary>
+	public struct Simplex2D : System.IEquatable<Simplex2D>
+	{
+		private Vector2 a;
+		private Vector2? b;
+		private Vector2? c;
+
+		public Vector2 A => a;
+		public Vector2? B => b;
+		public Vector2? C => c;
+
+		public bool ZeroSimplex { get { return !b.HasValue && !c.HasValue; } }
+		public bool OneSimplex { get { return b.HasValue && !c.HasValue; } }
+		public bool TwoSimplex { get { return b.HasValue && c.HasValue; } }
+
+		public int Count => TwoSimplex ? 3 : (OneSimplex ? 2 : 1);
+
+		public Simplex2D(Vector2 a)
+		{
+			this.a = a;
+			b = null;
+			c = null;
+		}
+
+		public Simplex2D(Vector2 a, Vector2 b)
+		{
+			this.a = a;
+			this.b = b;
+			c = null;
+		}
+
+		public Simplex2D(Vector2 a, Vector2 b, Vector2 c)
+		{
+			this.a = a;
+			this.b = b;
+			this.c = c;
+		}
+
+		public Vector2 this[int index]
+		{
+			get
+			{
+				if (index == 0) { return a; }
+				if (index == 1) { return b.Value; }
+				if (index == 2) { return c.Value; }
+				throw new System.IndexOutOfRangeException();
+			}
+		}
+
+		public IEnumerable<Vector2> Vertices
+		{
+			get
+			{
+				yield return (Vector2) a;
+				if (b.HasValue) { yield return (Vector2) b; }
+				if (c.HasValue) { yield return (Vector2) c; }
+			}
+		}
+
+		public Vector2 Support(Vector2 direction, Transform2D transform)
+		{
+			var maxDotProduct = float.NegativeInfinity;
+			var maxVertex = a;
+			foreach (var vertex in Vertices)
+			{
+				var transformed = Vector2.Transform(vertex, transform.TransformMatrix);
+				var dot = Vector2.Dot(transformed, direction);
+				if (dot > maxDotProduct)
+				{
+					maxVertex = transformed;
+					maxDotProduct = dot;
+				}
+			}
+			return maxVertex;
+		}
+
+		public void Insert(Vector2 point, int index)
+		{
+			if (index == 0)
+			{
+				c = b;
+				b = a;
+				a = point;
+			}
+			else if (index == 1)
+			{
+				c = b;
+				b = point;
+			}
+			else
+			{
+				c = point;
+			}
+		}
+
+		public override bool Equals(object obj)
+		{
+			return obj is Simplex2D other && Equals(other);
+		}
+
+		public bool Equals(Simplex2D other)
+		{
+			if (Count != other.Count) { return false; }
+
+			return
+				(A == other.A && B == other.B && C == other.C) ||
+				(A == other.A && B == other.C && C == other.B) ||
+				(A == other.B && B == other.A && C == other.C) ||
+				(A == other.B && B == other.C && C == other.A) ||
+				(A == other.C && B == other.A && C == other.B) ||
+				(A == other.C && B == other.B && C == other.A);
+		}
+
+		public override int GetHashCode()
+		{
+			return System.HashCode.Combine(Vertices);
+		}
+
+		public static bool operator ==(Simplex2D a, Simplex2D b)
+		{
+			return a.Equals(b);
+		}
+
+		public static bool operator !=(Simplex2D a, Simplex2D b)
+		{
+			return !(a == b);
+		}
+	}
+}

src/Collision/Float/SpatialHash2D.cs

@@ -0,0 +1,253 @@
+using System.Collections.Generic;
+using MoonWorks.Math.Float;
+
+namespace MoonWorks.Collision.Float
+{
+	/// <summary>
+	/// Used to quickly check if two shapes are potentially overlapping.
+	/// </summary>
+	/// <typeparam name="T">The type that will be used to uniquely identify shape-transform pairs.</typeparam>
+	public class SpatialHash2D<T> where T : System.IEquatable<T>
+	{
+		private readonly int cellSize;
+
+		private readonly Dictionary<long, HashSet<T>> hashDictionary = new Dictionary<long, HashSet<T>>();
+		// FIXME: this ICollidable causes boxing which triggers garbage collection
+		private readonly Dictionary<T, (ICollidable, Transform2D, uint)> IDLookup = new Dictionary<T, (ICollidable, Transform2D, uint)>();
+
+		public int MinX { get; private set; } = 0;
+		public int MaxX { get; private set; } = 0;
+		public int MinY { get; private set; } = 0;
+		public int MaxY { get; private set; } = 0;
+
+		private Queue<HashSet<T>> hashSetPool = new Queue<HashSet<T>>();
+
+		public SpatialHash2D(int cellSize)
+		{
+			this.cellSize = cellSize;
+		}
+
+		private (int, int) Hash(Vector2 position)
+		{
+			return ((int) System.Math.Floor(position.X / cellSize), (int) System.Math.Floor(position.Y / cellSize));
+		}
+
+		/// <summary>
+		/// Inserts an element into the SpatialHash.
+		/// </summary>
+		/// <param name="id">A unique ID for the shape-transform pair.</param>
+		/// <param name="shape"></param>
+		/// <param name="transform2D"></param>
+		/// <param name="collisionGroups">A bitmask value specifying the groups this object belongs to.</param>
+		public void Insert(T id, ICollidable shape, Transform2D transform2D, uint collisionGroups = uint.MaxValue)
+		{
+			var box = shape.TransformedAABB(transform2D);
+			var minHash = Hash(box.Min);
+			var maxHash = Hash(box.Max);
+
+			foreach (var key in Keys(minHash.Item1, minHash.Item2, maxHash.Item1, maxHash.Item2))
+			{
+				if (!hashDictionary.ContainsKey(key))
+				{
+					hashDictionary.Add(key, new HashSet<T>());
+				}
+
+				hashDictionary[key].Add(id);
+				IDLookup[id] = (shape, transform2D, collisionGroups);
+			}
+
+			MinX = System.Math.Min(MinX, minHash.Item1);
+			MinY = System.Math.Min(MinY, minHash.Item2);
+			MaxX = System.Math.Max(MaxX, maxHash.Item1);
+			MaxY = System.Math.Max(MaxY, maxHash.Item2);
+		}
+
+		/// <summary>
+		/// Retrieves all the potential collisions of a shape-transform pair. Excludes any shape-transforms with the given ID.
+		/// </summary>
+		public IEnumerable<(T, ICollidable, Transform2D, uint)> Retrieve(T id, ICollidable shape, Transform2D transform2D, uint collisionMask = uint.MaxValue)
+		{
+			var returned = AcquireHashSet();
+
+			var box = shape.TransformedAABB(transform2D);
+			var (minX, minY) = Hash(box.Min);
+			var (maxX, maxY) = Hash(box.Max);
+
+			if (minX < MinX) { minX = MinX; }
+			if (maxX > MaxX) { maxX = MaxX; }
+			if (minY < MinY) { minY = MinY; }
+			if (maxY > MaxY) { maxY = MaxY; }
+
+			foreach (var key in Keys(minX, minY, maxX, maxY))
+			{
+				if (hashDictionary.ContainsKey(key))
+				{
+					foreach (var t in hashDictionary[key])
+					{
+						if (!returned.Contains(t))
+						{
+							var (otherShape, otherTransform, collisionGroups) = IDLookup[t];
+							if (!id.Equals(t) && ((collisionGroups & collisionMask) > 0) && AABB2D.TestOverlap(box, otherShape.TransformedAABB(otherTransform)))
+							{
+								returned.Add(t);
+								yield return (t, otherShape, otherTransform, collisionGroups);
+							}
+						}
+					}
+				}
+			}
+
+			FreeHashSet(returned);
+		}
+
+		/// <summary>
+		/// Retrieves all the potential collisions of a shape-transform pair.
+		/// </summary>
+		public IEnumerable<(T, ICollidable, Transform2D, uint)> Retrieve(ICollidable shape, Transform2D transform2D, uint collisionMask = uint.MaxValue)
+		{
+			var returned = AcquireHashSet();
+
+			var box = shape.TransformedAABB(transform2D);
+			var (minX, minY) = Hash(box.Min);
+			var (maxX, maxY) = Hash(box.Max);
+
+			if (minX < MinX) { minX = MinX; }
+			if (maxX > MaxX) { maxX = MaxX; }
+			if (minY < MinY) { minY = MinY; }
+			if (maxY > MaxY) { maxY = MaxY; }
+
+			foreach (var key in Keys(minX, minY, maxX, maxY))
+			{
+				if (hashDictionary.ContainsKey(key))
+				{
+					foreach (var t in hashDictionary[key])
+					{
+						if (!returned.Contains(t))
+						{
+							var (otherShape, otherTransform, collisionGroups) = IDLookup[t];
+							if (((collisionGroups & collisionMask) > 0) && AABB2D.TestOverlap(box, otherShape.TransformedAABB(otherTransform)))
+							{
+								returned.Add(t);
+								yield return (t, otherShape, otherTransform, collisionGroups);
+							}
+						}
+					}
+				}
+			}
+
+			FreeHashSet(returned);
+		}
+
+		/// <summary>
+		/// Retrieves objects based on a pre-transformed AABB.
+		/// </summary>
+		/// <param name="aabb">A transformed AABB.</param>
+		/// <returns></returns>
+		public IEnumerable<(T, ICollidable, Transform2D, uint)> Retrieve(AABB2D aabb, uint collisionMask = uint.MaxValue)
+		{
+			var returned = AcquireHashSet();
+
+			var (minX, minY) = Hash(aabb.Min);
+			var (maxX, maxY) = Hash(aabb.Max);
+
+			if (minX < MinX) { minX = MinX; }
+			if (maxX > MaxX) { maxX = MaxX; }
+			if (minY < MinY) { minY = MinY; }
+			if (maxY > MaxY) { maxY = MaxY; }
+
+			foreach (var key in Keys(minX, minY, maxX, maxY))
+			{
+				if (hashDictionary.ContainsKey(key))
+				{
+					foreach (var t in hashDictionary[key])
+					{
+						if (!returned.Contains(t))
+						{
+							var (otherShape, otherTransform, collisionGroups) = IDLookup[t];
+							if (((collisionGroups & collisionMask) > 0) && AABB2D.TestOverlap(aabb, otherShape.TransformedAABB(otherTransform)))
+							{
+								yield return (t, otherShape, otherTransform, collisionGroups);
+							}
+						}
+					}
+				}
+			}
+
+			FreeHashSet(returned);
+		}
+
+		public void Update(T id, ICollidable shape, Transform2D transform2D, uint collisionGroups = uint.MaxValue)
+		{
+			Remove(id);
+			Insert(id, shape, transform2D, collisionGroups);
+		}
+
+		/// <summary>
+		/// Removes a specific ID from the SpatialHash.
+		/// </summary>
+		public void Remove(T id)
+		{
+			var (shape, transform, collisionGroups) = IDLookup[id];
+
+			var box = shape.TransformedAABB(transform);
+			var minHash = Hash(box.Min);
+			var maxHash = Hash(box.Max);
+
+			foreach (var key in Keys(minHash.Item1, minHash.Item2, maxHash.Item1, maxHash.Item2))
+			{
+				if (hashDictionary.ContainsKey(key))
+				{
+					hashDictionary[key].Remove(id);
+				}
+			}
+
+			IDLookup.Remove(id);
+		}
+
+		/// <summary>
+		/// Removes everything that has been inserted into the SpatialHash.
+		/// </summary>
+		public void Clear()
+		{
+			foreach (var hash in hashDictionary.Values)
+			{
+				hash.Clear();
+			}
+
+			IDLookup.Clear();
+		}
+
+		private static long MakeLong(int left, int right)
+		{
+			return ((long) left << 32) | ((uint) right);
+		}
+
+		private IEnumerable<long> Keys(int minX, int minY, int maxX, int maxY)
+		{
+			for (var i = minX; i <= maxX; i++)
+			{
+				for (var j = minY; j <= maxY; j++)
+				{
+					yield return MakeLong(i, j);
+				}
+			}
+		}
+
+		private HashSet<T> AcquireHashSet()
+		{
+			if (hashSetPool.Count == 0)
+			{
+				hashSetPool.Enqueue(new HashSet<T>());
+			}
+
+			var hashSet = hashSetPool.Dequeue();
+			hashSet.Clear();
+			return hashSet;
+		}
+
+		private void FreeHashSet(HashSet<T> hashSet)
+		{
+			hashSetPool.Enqueue(hashSet);
+		}
+	}
+}

src/Exceptions/AudioLoadException.cs

@@ -0,0 +1,12 @@
+using System;
+
+namespace MoonWorks
+{
+	public class AudioLoadException : Exception
+	{
+		public AudioLoadException(string message) : base(message)
+		{
+
+		}
+	}
+}

src/FrameLimiterSettings.cs

@@ -2,27 +2,13 @@ namespace MoonWorks
 {
 	public enum FrameLimiterMode
 	{
-		/// <summary>
-		/// The game will render at the maximum possible framerate that the computing resources allow. <br/>
-		/// Note that this may lead to overheating, resource starvation, etc.
-		/// </summary>
 		Uncapped,
-		/// <summary>
-		/// The game will render no more than the specified frames per second.
-		/// </summary>
 		Capped
 	}
 
-	/// <summary>
-	/// The Game's frame limiter setting. Specifies uncapped framerate or a maximum rendering frames per second value. <br/>
-	/// Note that this is separate from the Game's Update timestep and can be a different value.
-	/// </summary>
 	public struct FrameLimiterSettings
 	{
 		public FrameLimiterMode Mode;
-		/// <summary>
-		/// If Mode is set to Capped, this is the maximum frames per second that will be rendered.
-		/// </summary>
 		public int Cap;
 
 		public FrameLimiterSettings(

src/Game.cs

@@ -1,4 +1,5 @@
-using SDL2;
+using System.Collections.Generic;
+using SDL2;
 using MoonWorks.Audio;
 using MoonWorks.Graphics;
 using MoonWorks.Input;
@@ -8,12 +9,6 @@ using System.Diagnostics;
 
 namespace MoonWorks
 {
-	/// <summary>
-	/// This class is your entry point into controlling your game. <br/>
-	/// It manages the main game loop and subsystems. <br/>
-	/// You should inherit this class and implement Update and Draw methods. <br/>
-	/// Then instantiate your Game subclass from your Program.Main method and call the Run method.
-	/// </summary>
 	public abstract class Game
 	{
 		public TimeSpan MAX_DELTA_TIME = TimeSpan.FromMilliseconds(100);
@@ -38,18 +33,8 @@ namespace MoonWorks
 		public AudioDevice AudioDevice { get; }
 		public Inputs Inputs { get; }
 
-		/// <summary>
-		/// This Window is automatically created when your Game is instantiated.
-		/// </summary>
 		public Window MainWindow { get; }
 
-		/// <summary>
-		/// Instantiates your Game.
-		/// </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="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,
@@ -57,7 +42,6 @@ namespace MoonWorks
 			bool debugMode = false
 		)
 		{
-			Logger.LogInfo("Initializing frame limiter...");
 			Timestep = TimeSpan.FromTicks(TimeSpan.TicksPerSecond / targetTimestep);
 			gameTimer = Stopwatch.StartNew();
 
@@ -68,25 +52,21 @@ namespace MoonWorks
 				previousSleepTimes[i] = TimeSpan.FromMilliseconds(1);
 			}
 
-			Logger.LogInfo("Initializing SDL...");
 			if (SDL.SDL_Init(SDL.SDL_INIT_VIDEO | SDL.SDL_INIT_TIMER | SDL.SDL_INIT_GAMECONTROLLER) < 0)
 			{
-				Logger.LogError("Failed to initialize SDL!");
+				System.Console.WriteLine("Failed to initialize SDL!");
 				return;
 			}
 
 			Logger.Initialize();
 
-			Logger.LogInfo("Initializing input...");
 			Inputs = new Inputs();
 
-			Logger.LogInfo("Initializing graphics device...");
 			GraphicsDevice = new GraphicsDevice(
 				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.PresentMode))
@@ -94,13 +74,9 @@ namespace MoonWorks
 				throw new System.SystemException("Could not claim window!");
 			}
 
-			Logger.LogInfo("Initializing audio thread...");
 			AudioDevice = new AudioDevice();
 		}
 
-		/// <summary>
-		/// Initiates the main game loop. Call this once from your Program.Main method.
-		/// </summary>
 		public void Run()
 		{
 			MainWindow.Show();
@@ -110,29 +86,15 @@ namespace MoonWorks
 				Tick();
 			}
 
-			Logger.LogInfo("Starting shutdown sequence...");
-
-			Logger.LogInfo("Cleaning up game...");
 			Destroy();
 
-			Logger.LogInfo("Unclaiming window...");
-			GraphicsDevice.UnclaimWindow(MainWindow);
-
-			Logger.LogInfo("Disposing window...");
-			MainWindow.Dispose();
-
-			Logger.LogInfo("Disposing graphics device...");
-			GraphicsDevice.Dispose();
-
-			Logger.LogInfo("Closing audio thread...");
 			AudioDevice.Dispose();
+			MainWindow.Dispose();
+			GraphicsDevice.Dispose();
 
 			SDL.SDL_Quit();
 		}
 
-		/// <summary>
-		/// Updates the frame limiter settings.
-		/// </summary>
 		public void SetFrameLimiter(FrameLimiterSettings settings)
 		{
 			FramerateCapped = settings.Mode == FrameLimiterMode.Capped;
@@ -147,42 +109,18 @@ namespace MoonWorks
 			}
 		}
 
-		/// <summary>
-		/// Starts the game shutdown process.
-		/// </summary>
-		public void Quit()
-		{
-			quit = true;
-		}
-
-		/// <summary>
-		/// Will execute at the specified targetTimestep you provided when instantiating your Game class.
-		/// </summary>
-		/// <param name="delta"></param>
 		protected abstract void Update(TimeSpan delta);
-
-		/// <summary>
-		/// If the frame limiter mode is Capped, this will run at most Cap times per second. <br />
-		/// Otherwise it will run as many times as possible.
-		/// </summary>
-		/// <param name="alpha">A value from 0-1 describing how "in-between" update ticks it is called. Useful for interpolation.</param>
 		protected abstract void Draw(double alpha);
-
-		/// <summary>
-		/// You can optionally override this to perform cleanup tasks before the game quits.
-		/// </summary>
 		protected virtual void Destroy() {}
 
-		/// <summary>
-		/// Called when a file is dropped on the game window.
-		/// </summary>
+		// Called when a file is dropped on the game window.
 		protected virtual void DropFile(string filePath) {}
 
-		/// <summary>
-		/// Required to distinguish between multiple files dropped at once
-		/// vs multiple files dropped one at a time.
-		/// Called once for every multi-file drop.
-		/// </summary>
+		/* Required to distinguish between multiple files dropped at once
+		 * vs multiple files dropped one at a time.
+		 *
+		 * Called once for every multi-file drop.
+		 */
 		protected virtual void DropBegin() {}
 		protected virtual void DropComplete() {}
 
@@ -230,8 +168,9 @@ namespace MoonWorks
 				while (accumulatedUpdateTime >= Timestep)
 				{
 					Inputs.Update();
+					AudioDevice.Update();
+
 					Update(Timestep);
-					AudioDevice.WakeThread();
 
 					accumulatedUpdateTime -= Timestep;
 				}
@@ -343,27 +282,17 @@ namespace MoonWorks
 			var index = evt.cdevice.which;
 			if (SDL.SDL_IsGameController(index) == SDL.SDL_bool.SDL_TRUE)
 			{
-				Logger.LogInfo("New controller detected!");
+				System.Console.WriteLine($"New controller detected!");
 				Inputs.AddGamepad(index);
 			}
 		}
 
 		private void HandleControllerRemoved(SDL.SDL_Event evt)
 		{
-			Logger.LogInfo("Controller removal detected!");
+			System.Console.WriteLine($"Controller removal detected!");
 			Inputs.RemoveGamepad(evt.cdevice.which);
 		}
 
-		public static void ShowRuntimeError(string title, string message)
-		{
-			SDL.SDL_ShowSimpleMessageBox(
-				SDL.SDL_MessageBoxFlags.SDL_MESSAGEBOX_ERROR,
-				title ?? "",
-				message ?? "",
-				IntPtr.Zero
-			);
-		}
-
 		private TimeSpan AdvanceElapsedTime()
 		{
 			long currentTicks = gameTimer.Elapsed.Ticks;

src/Graphics/Bindings/BufferBinding.cs

@@ -1,8 +1,5 @@
 namespace MoonWorks.Graphics
 {
-	/// <summary>
-	/// A buffer-offset pair to be used when binding vertex buffers.
-	/// </summary>
 	public struct BufferBinding
 	{
 		public Buffer Buffer;

src/Graphics/Bindings/TextureSamplerBinding.cs

@@ -1,8 +1,7 @@
-namespace MoonWorks.Graphics
+using System;
+
+namespace MoonWorks.Graphics
 {
-	/// <summary>
-	/// A texture-sampler pair to be used when binding samplers.
-	/// </summary>
 	public struct TextureSamplerBinding
 	{
 		public Texture Texture;

src/Graphics/Color.cs

@@ -20,7 +20,6 @@ using System.Diagnostics;
 using System.Text;
 using MoonWorks.Math;
 using MoonWorks.Math.Float;
-using MoonWorks.Graphics.PackedVector;
 #endregion
 
 namespace MoonWorks.Graphics
@@ -1759,67 +1758,6 @@ namespace MoonWorks.Graphics
 			);
 		}
 
-		// Modified from one of the responses here:
-		// https://stackoverflow.com/questions/3018313/algorithm-to-convert-rgb-to-hsv-and-hsv-to-rgb-in-range-0-255-for-both/6930407#6930407
-		public static Color FromHSV(float r, float g, float b)
-		{
-			r = (100 + r) % 1f;
-
-			float hueSlice = 6 * r; // [0, 6)
-			float hueSliceInteger = MathF.Floor(hueSlice);
-
-			// In [0,1) for each hue slice
-			float hueSliceInterpolant = hueSlice - hueSliceInteger;
-
-			Vector3 tempRGB = new Vector3(
-				b * (1f - g),
-				b * (1f - g * hueSliceInterpolant),
-				b * (1f - g * (1f - hueSliceInterpolant))
-			);
-
-			// The idea here to avoid conditions is to notice that the conversion code can be rewritten:
-			//    if      ( var_i == 0 ) { R = V         ; G = TempRGB.z ; B = TempRGB.x }
-			//    else if ( var_i == 2 ) { R = TempRGB.x ; G = V         ; B = TempRGB.z }
-			//    else if ( var_i == 4 ) { R = TempRGB.z ; G = TempRGB.x ; B = V     }
-			//
-			//    else if ( var_i == 1 ) { R = TempRGB.y ; G = V         ; B = TempRGB.x }
-			//    else if ( var_i == 3 ) { R = TempRGB.x ; G = TempRGB.y ; B = V     }
-			//    else if ( var_i == 5 ) { R = V         ; G = TempRGB.x ; B = TempRGB.y }
-			//
-			// This shows several things:
-			//  . A separation between even and odd slices
-			//  . If slices (0,2,4) and (1,3,5) can be rewritten as basically being slices (0,1,2) then
-			//      the operation simply amounts to performing a "rotate right" on the RGB components
-			//  . The base value to rotate is either (V, B, R) for even slices or (G, V, R) for odd slices
-			//
-			float isOddSlice =  hueSliceInteger % 2f;                          // 0 if even (slices 0, 2, 4), 1 if odd (slices 1, 3, 5)
-			float threeSliceSelector = 0.5f * (hueSliceInteger - isOddSlice);  // (0, 1, 2) corresponding to slices (0, 2, 4) and (1, 3, 5)
-
-			Vector3 scrollingRGBForEvenSlices = new Vector3(b, tempRGB.Z, tempRGB.X); // (V, Temp Blue, Temp Red) for even slices (0, 2, 4)
-			Vector3 scrollingRGBForOddSlices = new Vector3(tempRGB.Y, b, tempRGB.X);  // (Temp Green, V, Temp Red) for odd slices (1, 3, 5)
-			Vector3 scrollingRGB = Vector3.Lerp(scrollingRGBForEvenSlices, scrollingRGBForOddSlices, isOddSlice);
-
-			float IsNotFirstSlice = MathHelper.Clamp(threeSliceSelector, 0f, 1f);        // 1 if NOT the first slice (true for slices 1 and 2)
-			float IsNotSecondSlice = MathHelper.Clamp(threeSliceSelector - 1f, 0f, 1f);  // 1 if NOT the first or second slice (true only for slice 2)
-
-			Vector3 color = Vector3.Lerp(
-				scrollingRGB,
-				Vector3.Lerp(
-					new Vector3(scrollingRGB.Z, scrollingRGB.X, scrollingRGB.Y),
-					new Vector3(scrollingRGB.Y, scrollingRGB.Z, scrollingRGB.X),
-					IsNotSecondSlice
-				),
-				IsNotFirstSlice
-			);
-
-			return new Color(color);
-		}
-
-		public static Color FromHSV(int r, int g, int b)
-		{
-			return Color.FromHSV(r / 255f, g / 255f, b / 255f);
-		}
-
 		#endregion
 
 		#region Public Static Operators and Override Methods

src/Graphics/CommandBufferPool.cs

@@ -1,34 +0,0 @@
-using System;
-using System.Collections.Concurrent;
-
-namespace MoonWorks.Graphics
-{
-	internal class CommandBufferPool
-	{
-		private GraphicsDevice GraphicsDevice;
-		private ConcurrentQueue<CommandBuffer> CommandBuffers = new ConcurrentQueue<CommandBuffer>();
-
-		public CommandBufferPool(GraphicsDevice graphicsDevice)
-		{
-			GraphicsDevice = graphicsDevice;
-		}
-
-		public CommandBuffer Obtain()
-		{
-			if (CommandBuffers.TryDequeue(out var commandBuffer))
-			{
-				return commandBuffer;
-			}
-			else
-			{
-				return new CommandBuffer(GraphicsDevice);
-			}
-		}
-
-		public void Return(CommandBuffer commandBuffer)
-		{
-			commandBuffer.Handle = IntPtr.Zero;
-			CommandBuffers.Enqueue(commandBuffer);
-		}
-	}
-}

src/Graphics/FencePool.cs

@@ -1,32 +0,0 @@
-using System.Collections.Concurrent;
-
-namespace MoonWorks.Graphics
-{
-	internal class FencePool
-	{
-		private GraphicsDevice GraphicsDevice;
-		private ConcurrentQueue<Fence> Fences = new ConcurrentQueue<Fence>();
-
-		public FencePool(GraphicsDevice graphicsDevice)
-		{
-			GraphicsDevice = graphicsDevice;
-		}
-
-		public Fence Obtain()
-		{
-			if (Fences.TryDequeue(out var fence))
-			{
-				return fence;
-			}
-			else
-			{
-				return new Fence(GraphicsDevice);
-			}
-		}
-
-		public void Return(Fence fence)
-		{
-			Fences.Enqueue(fence);
-		}
-	}
-}

src/Graphics/Font/Font.cs

@@ -1,121 +1,44 @@
 using System;
 using System.IO;
-using System.Runtime.InteropServices;
 using WellspringCS;
 
 namespace MoonWorks.Graphics.Font
 {
-	public unsafe class Font : GraphicsResource
+    public class Font : IDisposable
     {
-		public Texture Texture { get; }
-		public float PixelsPerEm { get; }
-		public float DistanceRange { get; }
+		public IntPtr Handle { get; }
 
-		internal IntPtr Handle { get; }
+		private bool IsDisposed;
 
-		private byte* StringBytes;
-		private int StringBytesLength;
-
-		/// <summary>
-		/// Loads a TTF or OTF font from a path for use in MSDF rendering.
-		/// Note that there must be an msdf-atlas-gen JSON and image file alongside.
-		/// </summary>
-		/// <returns></returns>
-		public unsafe static Font Load(
-			GraphicsDevice graphicsDevice,
-			CommandBuffer commandBuffer,
-			string fontPath
-		) {
-			var fontFileStream = new FileStream(fontPath, FileMode.Open, FileAccess.Read);
-			var fontFileByteBuffer = NativeMemory.Alloc((nuint) fontFileStream.Length);
-			var fontFileByteSpan = new Span<byte>(fontFileByteBuffer, (int) fontFileStream.Length);
-			fontFileStream.ReadExactly(fontFileByteSpan);
-			fontFileStream.Close();
-
-			var atlasFileStream = new FileStream(Path.ChangeExtension(fontPath, ".json"), FileMode.Open, FileAccess.Read);
-			var atlasFileByteBuffer = NativeMemory.Alloc((nuint) atlasFileStream.Length);
-			var atlasFileByteSpan = new Span<byte>(atlasFileByteBuffer, (int) atlasFileStream.Length);
-			atlasFileStream.ReadExactly(atlasFileByteSpan);
-			atlasFileStream.Close();
-
-			var handle = Wellspring.Wellspring_CreateFont(
-				(IntPtr) fontFileByteBuffer,
-				(uint) fontFileByteSpan.Length,
-				(IntPtr) atlasFileByteBuffer,
-				(uint) atlasFileByteSpan.Length,
-				out float pixelsPerEm,
-				out float distanceRange
-			);
-
-			var texture = Texture.FromImageFile(graphicsDevice, commandBuffer, Path.ChangeExtension(fontPath, ".png"));
-
-			NativeMemory.Free(fontFileByteBuffer);
-			NativeMemory.Free(atlasFileByteBuffer);
-
-			return new Font(graphicsDevice, handle, texture, pixelsPerEm, distanceRange);
-		}
-
-		private Font(GraphicsDevice device, IntPtr handle, Texture texture, float pixelsPerEm, float distanceRange) : base(device)
+        public unsafe Font(string path)
         {
-			Handle = handle;
-			Texture = texture;
-			PixelsPerEm = pixelsPerEm;
-			DistanceRange = distanceRange;
-
-			StringBytesLength = 32;
-			StringBytes = (byte*) NativeMemory.Alloc((nuint) StringBytesLength);
-		}
-
-		public unsafe bool TextBounds(
-			string text,
-			int pixelSize,
-			HorizontalAlignment horizontalAlignment,
-			VerticalAlignment verticalAlignment,
-			out Wellspring.Rectangle rectangle
-		) {
-			var byteCount = System.Text.Encoding.UTF8.GetByteCount(text);
-
-			if (StringBytesLength < byteCount)
+            var bytes = File.ReadAllBytes(path);
+			fixed (byte* pByte = &bytes[0])
 			{
-				StringBytes = (byte*) NativeMemory.Realloc(StringBytes, (nuint) byteCount);
-			}
-
-			fixed (char* chars = text)
-			{
-				System.Text.Encoding.UTF8.GetBytes(chars, text.Length, StringBytes, byteCount);
-
-				var result = Wellspring.Wellspring_TextBounds(
-					Handle,
-					pixelSize,
-					(Wellspring.HorizontalAlignment) horizontalAlignment,
-					(Wellspring.VerticalAlignment) verticalAlignment,
-					(IntPtr) StringBytes,
-					(uint) byteCount,
-					out rectangle
-				);
-
-				if (result == 0)
-				{
-					Logger.LogWarn("Could not decode string: " + text);
-					return false;
+				Handle = Wellspring.Wellspring_CreateFont((IntPtr) pByte, (uint) bytes.Length);
 			}
         }
 
-			return true;
-		}
-
-		protected override void Dispose(bool disposing)
+		protected virtual void Dispose(bool disposing)
 		{
 			if (!IsDisposed)
 			{
-				if (disposing)
-				{
-					Texture.Dispose();
+				Wellspring.Wellspring_DestroyFont(Handle);
+				IsDisposed = true;
+			}
 		}
 
-				Wellspring.Wellspring_DestroyFont(Handle);
+		~Font()
+		{
+		    // Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
+		    Dispose(disposing: false);
 		}
-			base.Dispose(disposing);
+
+		public void Dispose()
+		{
+			// Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
+			Dispose(disposing: true);
+			GC.SuppressFinalize(this);
 		}
 	}
 }

src/Graphics/Font/Packer.cs

@@ -0,0 +1,109 @@
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+using WellspringCS;
+
+namespace MoonWorks.Graphics.Font
+{
+	public class Packer : IDisposable
+	{
+		public IntPtr Handle { get; }
+		public Texture Texture { get; }
+
+		public Font Font { get; }
+
+		private byte[] StringBytes;
+
+		private bool IsDisposed;
+
+		public unsafe Packer(GraphicsDevice graphicsDevice, Font font, float fontSize, uint textureWidth, uint textureHeight, uint padding = 1)
+		{
+			Font = font;
+			Handle = Wellspring.Wellspring_CreatePacker(Font.Handle, fontSize, textureWidth, textureHeight, 0, padding);
+			Texture = Texture.CreateTexture2D(graphicsDevice, textureWidth, textureHeight, TextureFormat.R8, TextureUsageFlags.Sampler);
+			StringBytes = new byte[128];
+		}
+
+		public unsafe bool PackFontRanges(params FontRange[] fontRanges)
+		{
+			fixed (FontRange *pFontRanges = &fontRanges[0])
+			{
+				var nativeSize = fontRanges.Length * Marshal.SizeOf<Wellspring.FontRange>();
+				void* fontRangeMemory = NativeMemory.Alloc((nuint) fontRanges.Length, (nuint) Marshal.SizeOf<Wellspring.FontRange>());
+				System.Buffer.MemoryCopy(pFontRanges, fontRangeMemory, nativeSize, nativeSize);
+
+				var result = Wellspring.Wellspring_PackFontRanges(Handle, (IntPtr) fontRangeMemory, (uint) fontRanges.Length);
+
+				NativeMemory.Free(fontRangeMemory);
+
+				return result > 0;
+			}
+		}
+
+		public unsafe void SetTextureData(CommandBuffer commandBuffer)
+		{
+			var pixelDataPointer = Wellspring.Wellspring_GetPixelDataPointer(Handle);
+			commandBuffer.SetTextureData(Texture, pixelDataPointer, Texture.Width * Texture.Height);
+		}
+
+		public unsafe void TextBounds(
+			string text,
+			float x,
+			float y,
+			HorizontalAlignment horizontalAlignment,
+			VerticalAlignment verticalAlignment,
+			out Wellspring.Rectangle rectangle
+		) {
+			var byteCount = System.Text.Encoding.UTF8.GetByteCount(text);
+
+			if (StringBytes.Length < byteCount)
+			{
+				System.Array.Resize(ref StringBytes, byteCount);
+			}
+
+			fixed (char* chars = text)
+			fixed (byte* bytes = StringBytes)
+			{
+				System.Text.Encoding.UTF8.GetBytes(chars, text.Length, bytes, byteCount);
+				Wellspring.Wellspring_TextBounds(
+					Handle,
+					x,
+					y,
+					(Wellspring.HorizontalAlignment) horizontalAlignment,
+					(Wellspring.VerticalAlignment) verticalAlignment,
+					(IntPtr) bytes,
+					(uint) byteCount,
+					out rectangle
+				);
+			}
+		}
+
+		protected virtual void Dispose(bool disposing)
+		{
+			if (!IsDisposed)
+			{
+				if (disposing)
+				{
+					Texture.Dispose();
+				}
+
+				Wellspring.Wellspring_DestroyPacker(Handle);
+
+				IsDisposed = true;
+			}
+		}
+
+		~Packer()
+		{
+		    // Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
+		    Dispose(disposing: false);
+		}
+
+		public void Dispose()
+		{
+			// Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
+			Dispose(disposing: true);
+			GC.SuppressFinalize(this);
+		}
+	}
+}

src/Graphics/Font/Structs.cs

@@ -4,17 +4,19 @@ using MoonWorks.Math.Float;
 namespace MoonWorks.Graphics.Font
 {
 	[StructLayout(LayoutKind.Sequential)]
-	public struct Vertex : IVertexType
+	public struct FontRange
+	{
+		public uint FirstCodepoint;
+		public uint NumChars;
+		public byte OversampleH;
+		public byte OversampleV;
+	}
+
+	[StructLayout(LayoutKind.Sequential)]
+	public struct Vertex
 	{
 		public Vector3 Position;
 		public Vector2 TexCoord;
 		public Color Color;
-
-		public static VertexElementFormat[] Formats { get; } = new VertexElementFormat[]
-		{
-			VertexElementFormat.Vector3,
-			VertexElementFormat.Vector2,
-			VertexElementFormat.Color
-		};
 	}
 }

src/Graphics/Font/TextBatch.cs

@@ -1,87 +1,75 @@
 using System;
-using System.Runtime.InteropServices;
 using WellspringCS;
 
 namespace MoonWorks.Graphics.Font
 {
-	public unsafe class TextBatch : GraphicsResource
+	public class TextBatch
 	{
-		public const int INITIAL_CHAR_COUNT = 64;
-		public const int INITIAL_VERTEX_COUNT = INITIAL_CHAR_COUNT * 4;
-		public const int INITIAL_INDEX_COUNT = INITIAL_CHAR_COUNT * 6;
-
 		private GraphicsDevice GraphicsDevice { get; }
 		public IntPtr Handle { get; }
 
 		public Buffer VertexBuffer { get; protected set; } = null;
 		public Buffer IndexBuffer { get; protected set; } = null;
+		public Texture Texture { get; protected set; }
 		public uint PrimitiveCount { get; protected set; }
 
-		public Font CurrentFont { get; private set; }
+		private byte[] StringBytes;
 
-		private byte* StringBytes;
-		private int StringBytesLength;
-
-		public TextBatch(GraphicsDevice device) : base(device)
+		public TextBatch(GraphicsDevice graphicsDevice)
 		{
-			GraphicsDevice = device;
+			GraphicsDevice = graphicsDevice;
 			Handle = Wellspring.Wellspring_CreateTextBatch();
-
-			StringBytesLength = 128;
-			StringBytes = (byte*) NativeMemory.Alloc((nuint) StringBytesLength);
-
-			VertexBuffer = Buffer.Create<Vertex>(GraphicsDevice, BufferUsageFlags.Vertex, INITIAL_VERTEX_COUNT);
-			IndexBuffer = Buffer.Create<uint>(GraphicsDevice, BufferUsageFlags.Index, INITIAL_INDEX_COUNT);
+			StringBytes = new byte[128];
 		}
 
-		// Call this to initialize or reset the batch.
-		public void Start(Font font)
+		public void Start(Packer packer)
 		{
-			Wellspring.Wellspring_StartTextBatch(Handle, font.Handle);
-			CurrentFont = font;
+			Wellspring.Wellspring_StartTextBatch(Handle, packer.Handle);
+			Texture = packer.Texture;
 			PrimitiveCount = 0;
 		}
 
-		// Add text with size and color to the batch
-		public unsafe bool Add(
+		public unsafe void Draw(
 			string text,
-			int pixelSize,
+			float x,
+			float y,
+			float depth,
 			Color color,
 			HorizontalAlignment horizontalAlignment = HorizontalAlignment.Left,
 			VerticalAlignment verticalAlignment = VerticalAlignment.Baseline
 		) {
 			var byteCount = System.Text.Encoding.UTF8.GetByteCount(text);
 
-			if (StringBytesLength < byteCount)
+			if (StringBytes.Length < byteCount)
 			{
-				StringBytes = (byte*) NativeMemory.Realloc(StringBytes, (nuint) byteCount);
+				System.Array.Resize(ref StringBytes, byteCount);
 			}
 
 			fixed (char* chars = text)
+			fixed (byte* bytes = StringBytes)
 			{
-				System.Text.Encoding.UTF8.GetBytes(chars, text.Length, StringBytes, byteCount);
+				System.Text.Encoding.UTF8.GetBytes(chars, text.Length, bytes, byteCount);
 
-				var result = Wellspring.Wellspring_AddToTextBatch(
+				var result = Wellspring.Wellspring_Draw(
 					Handle,
-					pixelSize,
+					x,
+					y,
+					depth,
 					new Wellspring.Color { R = color.R, G = color.G, B = color.B, A = color.A },
 					(Wellspring.HorizontalAlignment) horizontalAlignment,
 					(Wellspring.VerticalAlignment) verticalAlignment,
-					(IntPtr) StringBytes,
+					(IntPtr) bytes,
 					(uint) byteCount
 				);
 
 				if (result == 0)
 				{
-					Logger.LogWarn("Could not decode string: " + text);
-					return false;
+					throw new System.ArgumentException("Could not decode string!");
+				}
 			}
 		}
 
-			return true;
-		}
-
-		// Call this after you have made all the Add calls you want, but before beginning a render pass.
+		// Call this after you have made all the Draw calls you want.
 		public unsafe void UploadBufferData(CommandBuffer commandBuffer)
 		{
 			Wellspring.Wellspring_GetBufferData(
@@ -93,16 +81,24 @@ namespace MoonWorks.Graphics.Font
 				out uint indexDataLengthInBytes
 			);
 
-			if (VertexBuffer.Size < vertexDataLengthInBytes)
+			if (VertexBuffer == null)
+			{
+				VertexBuffer = new Buffer(GraphicsDevice, BufferUsageFlags.Vertex, vertexDataLengthInBytes);
+			}
+			else if (VertexBuffer.Size < vertexDataLengthInBytes)
 			{
 				VertexBuffer.Dispose();
 				VertexBuffer = new Buffer(GraphicsDevice, BufferUsageFlags.Vertex, vertexDataLengthInBytes);
 			}
 
-			if (IndexBuffer.Size < indexDataLengthInBytes)
+			if (IndexBuffer == null)
+			{
+				IndexBuffer = new Buffer(GraphicsDevice, BufferUsageFlags.Index, indexDataLengthInBytes);
+			}
+			else if (IndexBuffer.Size < indexDataLengthInBytes)
 			{
 				IndexBuffer.Dispose();
-				IndexBuffer = new Buffer(GraphicsDevice, BufferUsageFlags.Index, vertexDataLengthInBytes);
+				IndexBuffer = new Buffer(GraphicsDevice, BufferUsageFlags.Index, indexDataLengthInBytes);
 			}
 
 			if (vertexDataLengthInBytes > 0 && indexDataLengthInBytes > 0)
@@ -111,41 +107,7 @@ namespace MoonWorks.Graphics.Font
 				commandBuffer.SetBufferData(IndexBuffer, indexDataPointer, 0, indexDataLengthInBytes);
 			}
 
-			PrimitiveCount = vertexCount / 2;
-		}
-
-		// Call this AFTER binding your text pipeline!
-		public void Render(CommandBuffer commandBuffer, Math.Float.Matrix4x4 transformMatrix)
-		{
-			commandBuffer.BindFragmentSamplers(new TextureSamplerBinding(
-				CurrentFont.Texture,
-				GraphicsDevice.LinearSampler
-			));
-			commandBuffer.BindVertexBuffers(VertexBuffer);
-			commandBuffer.BindIndexBuffer(IndexBuffer, IndexElementSize.ThirtyTwo);
-			commandBuffer.DrawIndexedPrimitives(
-				0,
-				0,
-				PrimitiveCount,
-				commandBuffer.PushVertexShaderUniforms(transformMatrix),
-				commandBuffer.PushFragmentShaderUniforms(CurrentFont.DistanceRange)
-			);
-		}
-
-		protected override void Dispose(bool disposing)
-		{
-			if (!IsDisposed)
-			{
-				if (disposing)
-				{
-					VertexBuffer.Dispose();
-					IndexBuffer.Dispose();
-				}
-
-				NativeMemory.Free(StringBytes);
-				Wellspring.Wellspring_DestroyTextBatch(Handle);
-			}
-			base.Dispose(disposing);
+			PrimitiveCount = vertexCount / 2; // FIXME: is this jank?
 		}
 	}
 }

src/Graphics/GraphicsDevice.cs

@@ -1,16 +1,10 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
-using System.Runtime.InteropServices;
-using MoonWorks.Video;
 using RefreshCS;
-using WellspringCS;
 
 namespace MoonWorks.Graphics
 {
-	/// <summary>
-	/// GraphicsDevice manages all graphics-related concerns.
-	/// </summary>
 	public class GraphicsDevice : IDisposable
 	{
 		public IntPtr Handle { get; }
@@ -22,22 +16,11 @@ namespace MoonWorks.Graphics
 		// Built-in video pipeline
 		internal GraphicsPipeline VideoPipeline { get; }
 
-		// Built-in text shader info
-		public GraphicsShaderInfo TextVertexShaderInfo { get; }
-		public GraphicsShaderInfo TextFragmentShaderInfo { get; }
-		public VertexInputState TextVertexInputState { get; }
-
-		// Built-in samplers
-		public Sampler PointSampler { get; }
-		public Sampler LinearSampler { get; }
-
 		public bool IsDisposed { get; private set; }
 
-		private readonly HashSet<GCHandle> resources = new HashSet<GCHandle>();
-		private FencePool FencePool;
-		private CommandBufferPool CommandBufferPool;
+		private readonly List<WeakReference<GraphicsResource>> resources = new List<WeakReference<GraphicsResource>>();
 
-		internal GraphicsDevice(
+		public GraphicsDevice(
 			Backend preferredBackend,
 			bool debugMode
 		) {
@@ -52,56 +35,14 @@ namespace MoonWorks.Graphics
 				Conversions.BoolToByte(debugMode)
 			);
 
-			// TODO: check for CreateDevice fail
-
-			// Check for replacement stock shaders
-			string basePath = System.AppContext.BaseDirectory;
-
-			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");
-
-			ShaderModule videoVertShader;
-			ShaderModule videoFragShader;
-
-			ShaderModule textVertShader;
-			ShaderModule textFragShader;
-
+			// Check for optional video shaders
+			string basePath = SDL2.SDL.SDL_GetBasePath();
+			string videoVertPath = Path.Combine(basePath, "video_fullscreen.refresh");
+			string videoFragPath = Path.Combine(basePath, "video_yuv2rgba.refresh");
 			if (File.Exists(videoVertPath) && File.Exists(videoFragPath))
 			{
-				videoVertShader = new ShaderModule(this, videoVertPath);
-				videoFragShader = new ShaderModule(this, videoFragPath);
-			}
-			else
-			{
-				// use defaults
-				var assembly = typeof(GraphicsDevice).Assembly;
-
-				using var vertStream = assembly.GetManifestResourceStream("MoonWorks.Graphics.StockShaders.VideoFullscreen.vert.refresh");
-				using var fragStream = assembly.GetManifestResourceStream("MoonWorks.Graphics.StockShaders.VideoYUV2RGBA.frag.refresh");
-
-				videoVertShader = new ShaderModule(this, vertStream);
-				videoFragShader = new ShaderModule(this, fragStream);
-			}
-
-			if (File.Exists(textVertPath) && File.Exists(textFragPath))
-			{
-				textVertShader = new ShaderModule(this, textVertPath);
-				textFragShader = new ShaderModule(this, textFragPath);
-			}
-			else
-			{
-				// use defaults
-				var assembly = typeof(GraphicsDevice).Assembly;
-
-				using var vertStream = assembly.GetManifestResourceStream("MoonWorks.Graphics.StockShaders.TextTransform.vert.refresh");
-				using var fragStream = assembly.GetManifestResourceStream("MoonWorks.Graphics.StockShaders.TextMSDF.frag.refresh");
-
-				textVertShader = new ShaderModule(this, vertStream);
-				textFragShader = new ShaderModule(this, fragStream);
-			}
+				ShaderModule videoVertShader = new ShaderModule(this, videoVertPath);
+				ShaderModule videoFragShader = new ShaderModule(this, videoFragPath);
 
 				VideoPipeline = new GraphicsPipeline(
 					this,
@@ -130,31 +71,11 @@ namespace MoonWorks.Graphics
 						MultisampleState = MultisampleState.None
 					}
 				);
-
-			TextVertexShaderInfo = GraphicsShaderInfo.Create<Math.Float.Matrix4x4>(textVertShader, "main", 0);
-			TextFragmentShaderInfo = GraphicsShaderInfo.Create<float>(textFragShader, "main", 1);
-			TextVertexInputState = VertexInputState.CreateSingleBinding<Font.Vertex>();
-
-			PointSampler = new Sampler(this, SamplerCreateInfo.PointClamp);
-			LinearSampler = new Sampler(this, SamplerCreateInfo.LinearClamp);
-
-			FencePool = new FencePool(this);
-			CommandBufferPool = new CommandBufferPool(this);
+			}
 		}
 
-		/// <summary>
-		/// Prepares a window so that frames can be presented to it.
-		/// </summary>
-		/// <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(Window window, PresentMode presentMode)
 		{
-			if (window.Claimed)
-			{
-				Logger.LogError("Window already claimed!");
-				return false;
-			}
-
 			var success = Conversions.ByteToBool(
 				Refresh.Refresh_ClaimWindow(
 					Handle,
@@ -169,46 +90,24 @@ namespace MoonWorks.Graphics
 				window.SwapchainFormat = GetSwapchainFormat(window);
 				if (window.SwapchainTexture == null)
 				{
-					window.SwapchainTexture = new Texture(this, window.SwapchainFormat);
+					window.SwapchainTexture = new Texture(this, IntPtr.Zero, window.SwapchainFormat, 0, 0);
 				}
 			}
 
 			return success;
 		}
 
-		/// <summary>
-		/// Unclaims a window, making it unavailable for presenting and freeing associated resources.
-		/// </summary>
 		public void UnclaimWindow(Window window)
-		{
-			if (window.Claimed)
 		{
 			Refresh.Refresh_UnclaimWindow(
 				Handle,
 				window.Handle
 			);
 			window.Claimed = false;
-
-				// The swapchain texture doesn't actually have a permanent texture reference, so we zero the handle before disposing.
-				window.SwapchainTexture.Handle = IntPtr.Zero;
-				window.SwapchainTexture.Dispose();
-				window.SwapchainTexture = null;
-			}
 		}
 
-		/// <summary>
-		/// Changes the present mode of a claimed window. Does nothing if the window is not claimed.
-		/// </summary>
-		/// <param name="window"></param>
-		/// <param name="presentMode"></param>
 		public void SetPresentMode(Window window, PresentMode presentMode)
 		{
-			if (!window.Claimed)
-			{
-				Logger.LogError("Cannot set present mode on unclaimed window!");
-				return;
-			}
-
 			Refresh.Refresh_SetSwapchainPresentMode(
 				Handle,
 				window.Handle,
@@ -216,208 +115,105 @@ namespace MoonWorks.Graphics
 			);
 		}
 
-		/// <summary>
-		/// Acquires a command buffer.
-		/// This is the start of your rendering process.
-		/// </summary>
-		/// <returns></returns>
 		public CommandBuffer AcquireCommandBuffer()
 		{
-			var commandBuffer = CommandBufferPool.Obtain();
-			commandBuffer.SetHandle(Refresh.Refresh_AcquireCommandBuffer(Handle));
-#if DEBUG
-			commandBuffer.ResetStateTracking();
-#endif
-			return commandBuffer;
+			return new CommandBuffer(this, Refresh.Refresh_AcquireCommandBuffer(Handle));
 		}
 
-		/// <summary>
-		/// Submits a command buffer to the GPU for processing.
-		/// </summary>
-		public void Submit(CommandBuffer commandBuffer)
+		public unsafe void Submit(CommandBuffer commandBuffer)
 		{
-#if DEBUG
-			if (commandBuffer.Submitted)
-			{
-				throw new System.InvalidOperationException("Command buffer already submitted!");
-			}
-#endif
+			var commandBufferPtrs = stackalloc IntPtr[1];
+
+			commandBufferPtrs[0] = commandBuffer.Handle;
 
 			Refresh.Refresh_Submit(
 				Handle,
-				commandBuffer.Handle
+				1,
+				(IntPtr) commandBufferPtrs
 			);
-
-			CommandBufferPool.Return(commandBuffer);
-
-#if DEBUG
-			commandBuffer.Submitted = true;
-#endif
 		}
 
-		/// <summary>
-		/// Submits a command buffer to the GPU for processing and acquires a fence associated with the submission.
-		/// </summary>
-		/// <returns></returns>
-		public Fence SubmitAndAcquireFence(CommandBuffer commandBuffer)
-		{
-			var fenceHandle = Refresh.Refresh_SubmitAndAcquireFence(
+		public unsafe void Submit(
+			CommandBuffer commandBufferOne,
+			CommandBuffer commandBufferTwo
+		) {
+			var commandBufferPtrs = stackalloc IntPtr[2];
+
+			commandBufferPtrs[0] = commandBufferOne.Handle;
+			commandBufferPtrs[1] = commandBufferTwo.Handle;
+
+			Refresh.Refresh_Submit(
 				Handle,
-				commandBuffer.Handle
+				2,
+				(IntPtr) commandBufferPtrs
+			);
+		}
+
+		public unsafe void Submit(
+			CommandBuffer commandBufferOne,
+			CommandBuffer commandBufferTwo,
+			CommandBuffer commandBufferThree
+		) {
+			var commandBufferPtrs = stackalloc IntPtr[3];
+
+			commandBufferPtrs[0] = commandBufferOne.Handle;
+			commandBufferPtrs[1] = commandBufferTwo.Handle;
+			commandBufferPtrs[2] = commandBufferThree.Handle;
+
+			Refresh.Refresh_Submit(
+				Handle,
+				3,
+				(IntPtr) commandBufferPtrs
+			);
+		}
+
+		public unsafe void Submit(
+			CommandBuffer commandBufferOne,
+			CommandBuffer commandBufferTwo,
+			CommandBuffer commandBufferThree,
+			CommandBuffer commandBufferFour
+		) {
+			var commandBufferPtrs = stackalloc IntPtr[4];
+
+			commandBufferPtrs[0] = commandBufferOne.Handle;
+			commandBufferPtrs[1] = commandBufferTwo.Handle;
+			commandBufferPtrs[2] = commandBufferThree.Handle;
+			commandBufferPtrs[3] = commandBufferFour.Handle;
+
+			Refresh.Refresh_Submit(
+				Handle,
+				4,
+				(IntPtr) commandBufferPtrs
+			);
+		}
+
+		public unsafe void Submit(params CommandBuffer[] commandBuffers)
+		{
+			var commandBufferPtrs = stackalloc IntPtr[commandBuffers.Length];
+
+			for (var i = 0; i < commandBuffers.Length; i += 1)
+			{
+				commandBufferPtrs[i] = commandBuffers[i].Handle;
+			}
+
+			Refresh.Refresh_Submit(
+				Handle,
+				(uint) commandBuffers.Length,
+				(IntPtr) commandBufferPtrs
 			);
-
-			var fence = FencePool.Obtain();
-			fence.SetHandle(fenceHandle);
-
-			return fence;
 		}
 
-		/// <summary>
-		/// Wait for the graphics device to become idle.
-		/// </summary>
 		public void Wait()
 		{
 			Refresh.Refresh_Wait(Handle);
 		}
 
-		/// <summary>
-		/// Waits for the given fence to become signaled.
-		/// </summary>
-		public unsafe void WaitForFences(Fence fence)
-		{
-			var handlePtr = stackalloc nint[1];
-			handlePtr[0] = fence.Handle;
-
-			Refresh.Refresh_WaitForFences(
-				Handle,
-				1,
-				1,
-				(nint) handlePtr
-			);
-		}
-
-		/// <summary>
-		/// 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(
-			Fence fenceOne,
-			Fence fenceTwo,
-			bool waitAll
-		) {
-			var handlePtr = stackalloc nint[2];
-			handlePtr[0] = fenceOne.Handle;
-			handlePtr[1] = fenceTwo.Handle;
-
-			Refresh.Refresh_WaitForFences(
-				Handle,
-				Conversions.BoolToByte(waitAll),
-				2,
-				(nint) handlePtr
-			);
-		}
-
-		/// <summary>
-		/// 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(
-			Fence fenceOne,
-			Fence fenceTwo,
-			Fence fenceThree,
-			bool waitAll
-		) {
-			var handlePtr = stackalloc nint[3];
-			handlePtr[0] = fenceOne.Handle;
-			handlePtr[1] = fenceTwo.Handle;
-			handlePtr[2] = fenceThree.Handle;
-
-			Refresh.Refresh_WaitForFences(
-				Handle,
-				Conversions.BoolToByte(waitAll),
-				3,
-				(nint) handlePtr
-			);
-		}
-
-		/// <summary>
-		/// 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(
-			Fence fenceOne,
-			Fence fenceTwo,
-			Fence fenceThree,
-			Fence fenceFour,
-			bool waitAll
-		) {
-			var handlePtr = stackalloc nint[4];
-			handlePtr[0] = fenceOne.Handle;
-			handlePtr[1] = fenceTwo.Handle;
-			handlePtr[2] = fenceThree.Handle;
-			handlePtr[3] = fenceFour.Handle;
-
-			Refresh.Refresh_WaitForFences(
-				Handle,
-				Conversions.BoolToByte(waitAll),
-				4,
-				(nint) handlePtr
-			);
-		}
-
-		/// <summary>
-		/// 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(Fence[] fences, bool waitAll)
-		{
-			var handlePtr = stackalloc nint[fences.Length];
-
-			for (var i = 0; i < fences.Length; i += 1)
-			{
-				handlePtr[i] = fences[i].Handle;
-			}
-
-			Refresh.Refresh_WaitForFences(
-				Handle,
-				Conversions.BoolToByte(waitAll),
-				4,
-				(nint) handlePtr
-			);
-		}
-
-		/// <summary>
-		/// Returns true if the fence is signaled, indicating that the associated command buffer has finished processing.
-		/// </summary>
-		/// <exception cref="InvalidOperationException">Throws if the fence query indicates that the graphics device has been lost.</exception>
-		public bool QueryFence(Fence fence)
-		{
-			var result = Refresh.Refresh_QueryFence(Handle, fence.Handle);
-
-			if (result < 0)
-			{
-				throw new InvalidOperationException("The graphics device has been lost.");
-			}
-
-			return result != 0;
-		}
-
-		/// <summary>
-		/// Release reference to an acquired fence, enabling it to be reused.
-		/// </summary>
-		public void ReleaseFence(Fence fence)
-		{
-			Refresh.Refresh_ReleaseFence(Handle, fence.Handle);
-			fence.Handle = IntPtr.Zero;
-			FencePool.Return(fence);
-		}
-
 		private TextureFormat GetSwapchainFormat(Window window)
 		{
 			return (TextureFormat) Refresh.Refresh_GetSwapchainFormat(Handle, window.Handle);
 		}
 
-		internal void AddResourceReference(GCHandle resourceReference)
+		internal void AddResourceReference(WeakReference<GraphicsResource> resourceReference)
 		{
 			lock (resources)
 			{
@@ -425,7 +221,7 @@ namespace MoonWorks.Graphics
 			}
 		}
 
-		internal void RemoveResourceReference(GCHandle resourceReference)
+		internal void RemoveResourceReference(WeakReference<GraphicsResource> resourceReference)
 		{
 			lock (resources)
 			{
@@ -441,28 +237,19 @@ namespace MoonWorks.Graphics
 				{
 					lock (resources)
 					{
-						// Dispose video players first to avoid race condition on threaded decoding
-						foreach (var resource in resources)
+						for (var i = resources.Count - 1; i >= 0; i--)
 						{
-							if (resource.Target is VideoPlayer player)
+							var resource = resources[i];
+							if (resource.TryGetTarget(out var target))
 							{
-								player.Dispose();
-							}
-						}
-
-						// Dispose everything else
-						foreach (var resource in resources)
-						{
-							if (resource.Target is IDisposable disposable)
-							{
-								disposable.Dispose();
+								target.Dispose();
 							}
 						}
 						resources.Clear();
 					}
-				}
 
 					Refresh.Refresh_DestroyDevice(Handle);
+				}
 
 				IsDisposed = true;
 			}

src/Graphics/GraphicsResource.cs

@@ -1,33 +1,37 @@
 using System;
-using System.Runtime.InteropServices;
 
 namespace MoonWorks.Graphics
 {
-	// TODO: give this a Name property for debugging use
 	public abstract class GraphicsResource : IDisposable
 	{
 		public GraphicsDevice Device { get; }
-
-		private GCHandle SelfReference;
+		public IntPtr Handle { get; internal set; }
 
 		public bool IsDisposed { get; private set; }
+		protected abstract Action<IntPtr, IntPtr> QueueDestroyFunction { get; }
 
-		protected GraphicsResource(GraphicsDevice device)
+		private WeakReference<GraphicsResource> selfReference;
+
+		public GraphicsResource(GraphicsDevice device, bool trackResource = true)
 		{
 			Device = device;
 
-			SelfReference = GCHandle.Alloc(this, GCHandleType.Weak);
-			Device.AddResourceReference(SelfReference);
+			if (trackResource)
+			{
+				selfReference = new WeakReference<GraphicsResource>(this);
+				Device.AddResourceReference(selfReference);
+			}
 		}
 
 		protected virtual void Dispose(bool disposing)
 		{
 			if (!IsDisposed)
 			{
-				if (disposing)
+				if (selfReference != null)
 				{
-					Device.RemoveResourceReference(SelfReference);
-					SelfReference.Free();
+					QueueDestroyFunction(Device.Handle, Handle);
+					Device.RemoveResourceReference(selfReference);
+					selfReference = null;
 				}
 
 				IsDisposed = true;
@@ -36,13 +40,8 @@ namespace MoonWorks.Graphics
 
 		~GraphicsResource()
 		{
-			#if DEBUG
-			// If you see this log message, you leaked a graphics resource without disposing it!
-			// We'll try to clean it up for you but you really should fix this.
-			Logger.LogWarn($"A resource of type {GetType().Name} was not Disposed.");
-			#endif
-
-			Dispose(false);
+			// Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
+			Dispose(disposing: false);
 		}
 
 		public void Dispose()

src/Graphics/IVertexType.cs

@@ -1,13 +1,7 @@
 namespace MoonWorks.Graphics
 {
-	/// <summary>
-	/// Can be defined on your struct type to enable simplified vertex input state definition.
-	/// </summary>
 	public interface IVertexType
 	{
-		/// <summary>
-		/// An ordered list of the types in your vertex struct.
-		/// </summary>
 		static abstract VertexElementFormat[] Formats { get; }
 	}
 }

src/Graphics/PackedVector/Alpha8.cs

@@ -20,7 +20,7 @@ using MoonWorks.Math;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	/// <summary>
 	/// Packed vector type containing unsigned normalized values ranging from 0 to 1.

src/Graphics/PackedVector/Bgr565.cs

@@ -20,7 +20,7 @@ using MoonWorks.Math;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	/// <summary>
 	/// Packed vector type containing unsigned normalized values ranging from 0 to 1.

src/Graphics/PackedVector/Bgra4444.cs

@@ -20,7 +20,7 @@ using MoonWorks.Math;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	/// <summary>
 	/// Packed vector type containing unsigned normalized values, ranging from 0 to 1, using

src/Graphics/PackedVector/Bgra5551.cs

@@ -20,7 +20,7 @@ using MoonWorks.Math;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	/// <summary>
 	/// Packed vector type containing unsigned normalized values ranging from 0 to 1.

src/Graphics/PackedVector/Byte4.cs

@@ -20,7 +20,7 @@ using MoonWorks.Math;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	/// <summary>
 	/// Packed vector type containing four 8-bit unsigned integer values, ranging from 0 to 255.

src/Graphics/PackedVector/HalfSingle.cs

@@ -19,7 +19,7 @@ using System;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	public struct HalfSingle : IPackedVector<ushort>, IEquatable<HalfSingle>, IPackedVector
 	{

src/Graphics/PackedVector/HalfTypeHelper.cs

@@ -19,7 +19,7 @@ using System;
 using System.Runtime.InteropServices;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	internal static class HalfTypeHelper
 	{

src/Graphics/PackedVector/HalfVector2.cs

@@ -19,7 +19,7 @@ using System;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	public struct HalfVector2 : IPackedVector<uint>, IPackedVector, IEquatable<HalfVector2>
 	{

src/Graphics/PackedVector/HalfVector4.cs

@@ -19,7 +19,7 @@ using System;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	/// <summary>
 	/// Packed vector type containing four 16-bit floating-point values.

src/Graphics/PackedVector/IPackedVector.cs

@@ -16,7 +16,7 @@
 
 using MoonWorks.Math.Float;
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	// http://msdn.microsoft.com/en-us/library/microsoft.xna.framework.graphics.packedvector.ipackedvector.aspx
 	public interface IPackedVector

src/Graphics/PackedVector/NormalizedByte2.cs

@@ -20,7 +20,7 @@ using MoonWorks.Math;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	public struct NormalizedByte2 : IPackedVector<ushort>, IEquatable<NormalizedByte2>
 	{

src/Graphics/PackedVector/NormalizedByte4.cs

@@ -20,7 +20,7 @@ using MoonWorks.Math;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	public struct NormalizedByte4 : IPackedVector<uint>, IEquatable<NormalizedByte4>
 	{

src/Graphics/PackedVector/NormalizedShort2.cs

@@ -20,7 +20,7 @@ using MoonWorks.Math;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	public struct NormalizedShort2 : IPackedVector<uint>, IEquatable<NormalizedShort2>
 	{

src/Graphics/PackedVector/NormalizedShort4.cs

@@ -20,7 +20,7 @@ using MoonWorks.Math;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	public struct NormalizedShort4 : IPackedVector<ulong>, IEquatable<NormalizedShort4>
 	{

src/Graphics/PackedVector/Rg32.cs

@@ -20,7 +20,7 @@ using MoonWorks.Math;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	/// <summary>
 	/// Packed vector type containing unsigned normalized values ranging from 0 to 1.

src/Graphics/PackedVector/Rgba1010102.cs

@@ -20,7 +20,7 @@ using MoonWorks.Math;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	/// <summary>
 	/// Packed vector type containing unsigned normalized values ranging from 0 to 1.

src/Graphics/PackedVector/Rgba64.cs

@@ -20,7 +20,7 @@ using MoonWorks.Math;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	/// <summary>
 	/// Packed vector type containing unsigned normalized values ranging from 0 to 1.

src/Graphics/PackedVector/Short2.cs

@@ -20,7 +20,7 @@ using MoonWorks.Math;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	public struct Short2 : IPackedVector<uint>, IEquatable<Short2>
 	{

src/Graphics/PackedVector/Short4.cs

@@ -20,7 +20,7 @@ using MoonWorks.Math;
 using MoonWorks.Math.Float;
 #endregion
 
-namespace MoonWorks.Graphics.PackedVector
+namespace MoonWorks.Graphics
 {
 	/// <summary>
 	/// Packed vector type containing four 16-bit signed integer values.

src/Graphics/RefreshEnums.cs

@@ -2,31 +2,11 @@
 
 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
 	}
 }

src/Graphics/RefreshResource.cs

@@ -1,31 +0,0 @@
-using System;
-using System.Runtime.InteropServices;
-using System.Threading;
-
-namespace MoonWorks.Graphics;
-
-public abstract class RefreshResource : GraphicsResource
-{
-	public IntPtr Handle { get => handle; internal set => handle = value; }
-	private IntPtr handle;
-
-	protected abstract Action<IntPtr, IntPtr> QueueDestroyFunction { get; }
-
-	protected RefreshResource(GraphicsDevice device) : base(device)
-	{
-	}
-
-	protected override void Dispose(bool disposing)
-	{
-		if (!IsDisposed)
-		{
-			// 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)
-			{
-				QueueDestroyFunction(Device.Handle, toDispose);
-			}
-		}
-		base.Dispose(disposing);
-	}
-}

src/Graphics/RefreshStructs.cs

@@ -127,12 +127,12 @@ namespace MoonWorks.Graphics
 		public uint Stride;
 		public VertexInputRate InputRate;
 
-		public static VertexBinding Create<T>(uint binding = 0, VertexInputRate inputRate = VertexInputRate.Vertex) where T : unmanaged
+		public static VertexBinding Create<T>(uint binding = 0) where T : unmanaged
 		{
 			return new VertexBinding
 			{
 				Binding = binding,
-				InputRate = inputRate,
+				InputRate = VertexInputRate.Vertex,
 				Stride = (uint) Marshal.SizeOf<T>()
 			};
 		}
@@ -181,6 +181,7 @@ namespace MoonWorks.Graphics
 		public uint Depth;
 		public uint Layer;
 		public uint Level;
+		public SampleCount SampleCount;
 		public Color ClearColor;
 		public LoadOp LoadOp;
 		public StoreOp StoreOp;
@@ -188,12 +189,15 @@ namespace MoonWorks.Graphics
 		public ColorAttachmentInfo(
 			Texture texture,
 			Color clearColor,
+			SampleCount sampleCount = SampleCount.One,
 			StoreOp storeOp = StoreOp.Store
-		) {
+		)
+		{
 			Texture = texture;
 			Depth = 0;
 			Layer = 0;
 			Level = 0;
+			SampleCount = sampleCount;
 			ClearColor = clearColor;
 			LoadOp = LoadOp.Clear;
 			StoreOp = storeOp;
@@ -202,12 +206,15 @@ namespace MoonWorks.Graphics
 		public ColorAttachmentInfo(
 			Texture texture,
 			LoadOp loadOp = LoadOp.DontCare,
+			SampleCount sampleCount = SampleCount.One,
 			StoreOp storeOp = StoreOp.Store
-		) {
+		)
+		{
 			Texture = texture;
 			Depth = 0;
 			Layer = 0;
 			Level = 0;
+			SampleCount = sampleCount;
 			ClearColor = Color.White;
 			LoadOp = loadOp;
 			StoreOp = storeOp;
@@ -221,6 +228,7 @@ namespace MoonWorks.Graphics
 				depth = Depth,
 				layer = Layer,
 				level = Level,
+				sampleCount = (Refresh.SampleCount) SampleCount,
 				clearColor = new Refresh.Vec4
 				{
 					x = ClearColor.R / 255f,

src/Graphics/Resources/Buffer.cs

@@ -7,7 +7,7 @@ namespace MoonWorks.Graphics
 	/// <summary>
 	/// Buffers are generic data containers that can be used by the GPU.
 	/// </summary>
-	public class Buffer : RefreshResource
+	public class Buffer : GraphicsResource
 	{
 		protected override Action<IntPtr, IntPtr> QueueDestroyFunction => Refresh.Refresh_QueueDestroyBuffer;
 
@@ -58,29 +58,17 @@ namespace MoonWorks.Graphics
 		}
 
 		/// <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.
+		/// Reads data out of a buffer and into an array.
+		/// This operation is only guaranteed to read up-to-date data if GraphicsDevice.Wait is called first.
 		/// </summary>
-		/// <param name="data">The span that data will be copied to.</param>
+		/// <param name="data">The array 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,
+			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)
+			fixed (T* ptr = &data[0])
 			{
 				Refresh.Refresh_GetBufferData(
 					Device.Handle,
@@ -91,48 +79,6 @@ namespace MoonWorks.Graphics
 			}
 		}
 
-		/// <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

@@ -1,12 +1,10 @@
 using RefreshCS;
 using System;
+using System.Runtime.InteropServices;
 
 namespace MoonWorks.Graphics
 {
-	/// <summary>
-	/// Compute pipelines perform arbitrary parallel processing on input data.
-	/// </summary>
-	public class ComputePipeline : RefreshResource
+	public class ComputePipeline : GraphicsResource
 	{
 		protected override Action<IntPtr, IntPtr> QueueDestroyFunction => Refresh.Refresh_QueueDestroyComputePipeline;
 

src/Graphics/Resources/Fence.cs

@@ -1,26 +0,0 @@
-using System;
-using RefreshCS;
-
-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 : RefreshResource
-	{
-		protected override Action<nint, nint> QueueDestroyFunction => Refresh.Refresh_ReleaseFence;
-
-		internal Fence(GraphicsDevice device) : base(device)
-		{
-		}
-
-		internal void SetHandle(nint handle)
-		{
-			Handle = handle;
-		}
-	}
-}

src/Graphics/Resources/GraphicsPipeline.cs

@@ -5,10 +5,10 @@ using RefreshCS;
 namespace MoonWorks.Graphics
 {
 	/// <summary>
-	/// Graphics pipelines encapsulate all of the render state in a single object. <br/>
+	/// Graphics pipelines encapsulate all of the render state in a single object.
 	/// These pipelines are bound before draw calls are issued.
 	/// </summary>
-	public class GraphicsPipeline : RefreshResource
+	public class GraphicsPipeline : GraphicsResource
 	{
 		protected override Action<IntPtr, IntPtr> QueueDestroyFunction => Refresh.Refresh_QueueDestroyGraphicsPipeline;
 

src/Graphics/Resources/Sampler.cs

@@ -6,7 +6,7 @@ namespace MoonWorks.Graphics
 	/// <summary>
 	/// A sampler specifies how a texture will be sampled in a shader.
 	/// </summary>
-	public class Sampler : RefreshResource
+	public class Sampler : GraphicsResource
 	{
 		protected override Action<IntPtr, IntPtr> QueueDestroyFunction => Refresh.Refresh_QueueDestroySampler;
 

src/Graphics/Resources/ShaderModule.cs

@@ -1,42 +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
+	public class ShaderModule : GraphicsResource
 	{
 		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);
+			using (FileStream 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)
+		private unsafe static 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);
+			var bytecode = new byte[stream.Length];
+			stream.Read(bytecode, 0, (int) stream.Length);
 
+			fixed (byte* ptr = bytecode)
+			{
 				Refresh.ShaderModuleCreateInfo shaderModuleCreateInfo;
-			shaderModuleCreateInfo.codeSize = (nuint) stream.Length;
-			shaderModuleCreateInfo.byteCode = (nint) bytecodeBuffer;
+				shaderModuleCreateInfo.codeSize = (UIntPtr) bytecode.Length;
+				shaderModuleCreateInfo.byteCode = (IntPtr) ptr;
 
-			var shaderModule = Refresh.Refresh_CreateShaderModule(device.Handle, shaderModuleCreateInfo);
-
-			NativeMemory.Free(bytecodeBuffer);
-			return shaderModule;
+				return Refresh.Refresh_CreateShaderModule(device.Handle, shaderModuleCreateInfo);
+			}
 		}
 	}
 }

src/Graphics/Resources/Texture.cs

@@ -1,6 +1,5 @@
 using System;
 using System.IO;
-using System.Runtime.InteropServices;
 using RefreshCS;
 
 namespace MoonWorks.Graphics
@@ -8,7 +7,7 @@ namespace MoonWorks.Graphics
 	/// <summary>
 	/// A container for pixel data.
 	/// </summary>
-	public class Texture : RefreshResource
+	public class Texture : GraphicsResource
 	{
 		public uint Width { get; internal set; }
 		public uint Height { get; internal set; }
@@ -16,132 +15,67 @@ namespace MoonWorks.Graphics
 		public TextureFormat Format { get; internal set; }
 		public bool IsCube { get; }
 		public uint LevelCount { get; }
-		public SampleCount SampleCount { get; }
 		public TextureUsageFlags UsageFlags { get; }
-		public uint Size { get; }
 
 		// FIXME: this allocates a delegate instance
 		protected override Action<IntPtr, IntPtr> QueueDestroyFunction => Refresh.Refresh_QueueDestroyTexture;
 
 		/// <summary>
-		/// Creates a 2D Texture using PNG or QOI data from raw byte data.
+		/// Loads a PNG from a file path.
+		/// NOTE: You can queue as many of these as you want on to a command buffer but it MUST be submitted!
 		/// </summary>
-		public static unsafe Texture FromImageBytes(
-			GraphicsDevice device,
-			CommandBuffer commandBuffer,
-			Span<byte> data
-		) {
-			Texture texture;
-
-			fixed (byte *dataPtr = data)
+		/// <param name="device"></param>
+		/// <param name="commandBuffer"></param>
+		/// <param name="filePath"></param>
+		/// <returns></returns>
+		public static Texture LoadPNG(GraphicsDevice device, CommandBuffer commandBuffer, string filePath)
 		{
-				var pixels = Refresh.Refresh_Image_Load((nint) dataPtr, data.Length, out var width, out var height, out var len);
+			var pixels = Refresh.Refresh_Image_Load(
+				filePath,
+				out var width,
+				out var height,
+				out var channels
+			);
 
-				TextureCreateInfo textureCreateInfo = new TextureCreateInfo();
+			var byteCount = (uint) (width * height * channels);
+
+			TextureCreateInfo 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);
+			var texture = new Texture(device, textureCreateInfo);
+			commandBuffer.SetTextureData(texture, pixels, byteCount);
 
 			Refresh.Refresh_Image_Free(pixels);
-			}
 
 			return texture;
 		}
 
 		/// <summary>
-		/// Creates a 2D Texture using PNG or QOI data from a stream.
+		/// Saves RGBA or BGRA pixel data to a file in PNG format.
 		/// </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)
+		public unsafe static void SavePNG(string path, int width, int height, TextureFormat format, byte[] pixels)
 		{
-				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)
+			if (format != TextureFormat.R8G8B8A8 && format != TextureFormat.B8G8R8A8)
+			{
+				throw new ArgumentException("Texture format must be RGBA8 or BGRA8!", "format");
+			}
+
+			fixed (byte* ptr = &pixels[0])
+			{
+				Refresh.Refresh_Image_SavePNG(path, width, height, Conversions.BoolToByte(format == TextureFormat.B8G8R8A8), (IntPtr) ptr);
+			}
+		}
+
+		public static Texture LoadDDS(GraphicsDevice graphicsDevice, CommandBuffer commandBuffer, System.IO.Stream stream)
+		{
+			using (var reader = new BinaryReader(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);
@@ -164,20 +98,22 @@ namespace MoonWorks.Graphics
 						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 pixels = reader.ReadBytes(
+							Texture.CalculateDDSLevelSize(
+								levelWidth,
+								levelHeight,
+								format
+							)
+						);
 
 						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);
+						commandBuffer.SetTextureData(textureSlice, pixels);
 					}
 				}
 
 				return texture;
 			}
+		}
 
 		/// <summary>
 		/// Creates a 2D texture.
@@ -194,9 +130,9 @@ namespace MoonWorks.Graphics
 			uint height,
 			TextureFormat format,
 			TextureUsageFlags usageFlags,
-			uint levelCount = 1,
-			SampleCount sampleCount = SampleCount.One
-		) {
+			uint levelCount = 1
+		)
+		{
 			var textureCreateInfo = new TextureCreateInfo
 			{
 				Width = width,
@@ -204,7 +140,6 @@ namespace MoonWorks.Graphics
 				Depth = 1,
 				IsCube = false,
 				LevelCount = levelCount,
-				SampleCount = sampleCount,
 				Format = format,
 				UsageFlags = usageFlags
 			};
@@ -230,7 +165,8 @@ namespace MoonWorks.Graphics
 			TextureFormat format,
 			TextureUsageFlags usageFlags,
 			uint levelCount = 1
-		) {
+		)
+		{
 			var textureCreateInfo = new TextureCreateInfo
 			{
 				Width = width,
@@ -259,7 +195,8 @@ namespace MoonWorks.Graphics
 			TextureFormat format,
 			TextureUsageFlags usageFlags,
 			uint levelCount = 1
-		) {
+		)
+		{
 			var textureCreateInfo = new TextureCreateInfo
 			{
 				Width = size,
@@ -295,9 +232,7 @@ namespace MoonWorks.Graphics
 			Depth = textureCreateInfo.Depth;
 			IsCube = textureCreateInfo.IsCube;
 			LevelCount = textureCreateInfo.LevelCount;
-			SampleCount = textureCreateInfo.SampleCount;
 			UsageFlags = textureCreateInfo.UsageFlags;
-			Size = Width * Height * BytesPerPixel(Format) / BlockSizeSquared(Format);
 		}
 
 		public static implicit operator TextureSlice(Texture t) => new TextureSlice(t);
@@ -306,20 +241,21 @@ namespace MoonWorks.Graphics
 		// Should not be tracked, because swapchain textures are managed by Vulkan.
 		internal Texture(
 			GraphicsDevice device,
-			TextureFormat format
-		) : base(device)
+			IntPtr handle,
+			TextureFormat format,
+			uint width,
+			uint height
+		) : base(device, false)
 		{
-			Handle = IntPtr.Zero;
+			Handle = handle;
 
 			Format = format;
-			Width = 0;
-			Height = 0;
+			Width = width;
+			Height = height;
 			Depth = 1;
 			IsCube = false;
 			LevelCount = 1;
-			SampleCount = SampleCount.One;
 			UsageFlags = TextureUsageFlags.ColorTarget;
-			Size = Width * Height * BytesPerPixel(Format) / BlockSizeSquared(Format);
 		}
 
 		// DDS loading extension, based on MojoDDS
@@ -589,155 +525,5 @@ namespace MoonWorks.Graphics
 				);
 			}
 		}
-
-		/// <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)
-			{
-				case TextureFormat.R8:
-				case TextureFormat.R8_UINT:
-					return 1;
-				case TextureFormat.R5G6B5:
-				case TextureFormat.B4G4R4A4:
-				case TextureFormat.A1R5G5B5:
-				case TextureFormat.R16_SFLOAT:
-				case TextureFormat.R8G8_SNORM:
-				case TextureFormat.R8G8_UINT:
-				case TextureFormat.R16_UINT:
-				case TextureFormat.D16:
-					return 2;
-				case TextureFormat.D16S8:
-					return 3;
-				case TextureFormat.R8G8B8A8:
-				case TextureFormat.B8G8R8A8:
-				case TextureFormat.R32_SFLOAT:
-				case TextureFormat.R16G16:
-				case TextureFormat.R16G16_SFLOAT:
-				case TextureFormat.R8G8B8A8_SNORM:
-				case TextureFormat.A2R10G10B10:
-				case TextureFormat.R8G8B8A8_UINT:
-				case TextureFormat.R16G16_UINT:
-				case TextureFormat.D32:
-					return 4;
-				case TextureFormat.D32S8:
-					return 5;
-				case TextureFormat.R16G16B16A16_SFLOAT:
-				case TextureFormat.R16G16B16A16:
-				case TextureFormat.R32G32_SFLOAT:
-				case TextureFormat.R16G16B16A16_UINT:
-				case TextureFormat.BC1:
-					return 8;
-				case TextureFormat.R32G32B32A32_SFLOAT:
-				case TextureFormat.BC2:
-				case TextureFormat.BC3:
-				case TextureFormat.BC7:
-					return 16;
-				default:
-					Logger.LogError("Texture format not recognized!");
-					return 0;
-			}
-		}
-
-		public static uint BlockSizeSquared(TextureFormat format)
-		{
-			switch (format)
-			{
-				case TextureFormat.BC1:
-				case TextureFormat.BC2:
-				case TextureFormat.BC3:
-				case TextureFormat.BC7:
-					return 16;
-				case TextureFormat.R8G8B8A8:
-				case TextureFormat.B8G8R8A8:
-				case TextureFormat.R5G6B5:
-				case TextureFormat.A1R5G5B5:
-				case TextureFormat.B4G4R4A4:
-				case TextureFormat.A2R10G10B10:
-				case TextureFormat.R16G16:
-				case TextureFormat.R16G16B16A16:
-				case TextureFormat.R8:
-				case TextureFormat.R8G8_SNORM:
-				case TextureFormat.R8G8B8A8_SNORM:
-				case TextureFormat.R16_SFLOAT:
-				case TextureFormat.R16G16_SFLOAT:
-				case TextureFormat.R16G16B16A16_SFLOAT:
-				case TextureFormat.R32_SFLOAT:
-				case TextureFormat.R32G32_SFLOAT:
-				case TextureFormat.R32G32B32A32_SFLOAT:
-				case TextureFormat.R8_UINT:
-				case TextureFormat.R8G8_UINT:
-				case TextureFormat.R8G8B8A8_UINT:
-				case TextureFormat.R16_UINT:
-				case TextureFormat.R16G16_UINT:
-				case TextureFormat.R16G16B16A16_UINT:
-				case TextureFormat.D16:
-				case TextureFormat.D32:
-				case TextureFormat.D16S8:
-				case TextureFormat.D32S8:
-					return 1;
-				default:
-					Logger.LogError("Texture format not recognized!");
-					return 0;
-			}
-		}
 	}
 }

src/Graphics/State/ColorAttachmentBlendState.cs

@@ -2,9 +2,6 @@
 
 namespace MoonWorks.Graphics
 {
-	/// <summary>
-	/// Defines how color blending will be performed in a GraphicsPipeline.
-	/// </summary>
 	public struct ColorAttachmentBlendState
 	{
 		/// <summary>

src/Graphics/State/ComputeShaderInfo.cs

@@ -3,7 +3,7 @@ using System.Runtime.InteropServices;
 namespace MoonWorks.Graphics
 {
 	/// <summary>
-	/// Information that the compute pipeline needs about a compute shader.
+	/// Information that the pipeline needs about a shader.
 	/// </summary>
 	public struct ComputeShaderInfo
 	{

src/Graphics/State/GraphicsPipelineCreateInfo.cs

@@ -1,8 +1,5 @@
 namespace MoonWorks.Graphics
 {
-	/// <summary>
-	/// All of the information that is used to create a GraphicsPipeline.
-	/// </summary>
 	public struct GraphicsPipelineCreateInfo
 	{
 		public DepthStencilState DepthStencilState;

src/Graphics/State/GraphicsShaderInfo.cs

@@ -3,7 +3,7 @@
 namespace MoonWorks.Graphics
 {
 	/// <summary>
-	/// Information that the pipeline needs about a graphics shader.
+	/// Information that the pipeline needs about a shader.
 	/// </summary>
 	public struct GraphicsShaderInfo
 	{

src/Graphics/State/SamplerCreateInfo.cs

@@ -2,60 +2,21 @@
 
 namespace MoonWorks.Graphics
 {
-	/// <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>
 		public Filter MinFilter;
-		/// <summary>
-		/// Magnification filter mode. Used when the image is upscaled.
-		/// </summary>
 		public Filter MagFilter;
-		/// <summary>
-		/// Filter mode applied to mipmap lookups.
-		/// </summary>
 		public SamplerMipmapMode MipmapMode;
-		/// <summary>
-		/// Horizontal addressing mode.
-		/// </summary>
 		public SamplerAddressMode AddressModeU;
-		/// <summary>
-		/// Vertical addressing mode.
-		/// </summary>
 		public SamplerAddressMode AddressModeV;
-		/// <summary>
-		/// Depth addressing mode.
-		/// </summary>
 		public SamplerAddressMode AddressModeW;
-		/// <summary>
-		/// Bias value added to mipmap level of detail calculation.
-		/// </summary>
 		public float MipLodBias;
-		/// <summary>
-		/// Enables anisotropic filtering.
-		/// </summary>
 		public bool AnisotropyEnable;
-		/// <summary>
-		/// Maximum anisotropy value.
-		/// </summary>
 		public float MaxAnisotropy;
 		public bool CompareEnable;
 		public CompareOp CompareOp;
-		/// <summary>
-		/// Clamps the LOD value to a specified minimum.
-		/// </summary>
 		public float MinLod;
-		/// <summary>
-		/// Clamps the LOD value to a specified maximum.
-		/// </summary>
 		public float MaxLod;
-		/// <summary>
-		/// If an address mode is set to ClampToBorder, will replace color with this color when samples are outside the [0, 1) range.
-		/// </summary>
 		public BorderColor BorderColor;
 
 		public static readonly SamplerCreateInfo AnisotropicClamp = new SamplerCreateInfo

src/Graphics/State/TextureCreateInfo.cs

@@ -2,9 +2,6 @@
 
 namespace MoonWorks.Graphics
 {
-	/// <summary>
-	/// All of the information that is used to create a texture.
-	/// </summary>
 	public struct TextureCreateInfo
 	{
 		public uint Width;
@@ -12,7 +9,6 @@ namespace MoonWorks.Graphics
 		public uint Depth;
 		public bool IsCube;
 		public uint LevelCount;
-		public SampleCount SampleCount;
 		public TextureFormat Format;
 		public TextureUsageFlags UsageFlags;
 
@@ -25,7 +21,6 @@ namespace MoonWorks.Graphics
 				depth = Depth,
 				isCube = Conversions.BoolToByte(IsCube),
 				levelCount = LevelCount,
-				sampleCount = (Refresh.SampleCount) SampleCount,
 				format = (Refresh.TextureFormat) Format,
 				usageFlags = (Refresh.TextureUsageFlags) UsageFlags
 			};

src/Graphics/State/VertexInputState.cs

@@ -1,7 +1,7 @@
 namespace MoonWorks.Graphics
 {
 	/// <summary>
-	/// Specifies how the vertex shader will interpet vertex data in a buffer.
+	/// Specifies how to interpet vertex data in a buffer to be passed to the vertex shader.
 	/// </summary>
 	public struct VertexInputState
 	{

src/Graphics/StockShaders/Source/text_msdf.frag

@@ -1,34 +0,0 @@
-#version 450
-
-layout(set = 1, binding = 0) uniform sampler2D msdf;
-
-layout(location = 0) in vec2 inTexCoord;
-layout(location = 1) in vec4 inColor;
-
-layout(location = 0) out vec4 outColor;
-
-layout(binding = 0, set = 3) uniform UBO
-{
-	float pxRange;
-} ubo;
-
-float median(float r, float g, float b)
-{
-	return max(min(r, g), min(max(r, g), b));
-}
-
-float screenPxRange()
-{
-    vec2 unitRange = vec2(ubo.pxRange)/vec2(textureSize(msdf, 0));
-    vec2 screenTexSize = vec2(1.0)/fwidth(inTexCoord);
-    return max(0.5*dot(unitRange, screenTexSize), 1.0);
-}
-
-void main()
-{
-	vec3 msd = texture(msdf, inTexCoord).rgb;
-	float sd = median(msd.r, msd.g, msd.b);
-    float screenPxDistance = screenPxRange() * (sd - 0.5);
-    float opacity = clamp(screenPxDistance + 0.5, 0.0, 1.0);
-    outColor = mix(vec4(0.0, 0.0, 0.0, 0.0), inColor, opacity);
-}

src/Graphics/StockShaders/Source/text_transform.vert

@@ -1,20 +0,0 @@
-#version 450
-
-layout(location = 0) in vec3 inPos;
-layout(location = 1) in vec2 inTexCoord;
-layout(location = 2) in vec4 inColor;
-
-layout(location = 0) out vec2 outTexCoord;
-layout(location = 1) out vec4 outColor;
-
-layout(binding = 0, set = 2) uniform UBO
-{
-	mat4 ViewProjection;
-} ubo;
-
-void main()
-{
-	gl_Position = ubo.ViewProjection * vec4(inPos, 1.0);
-	outTexCoord = inTexCoord;
-	outColor = inColor;
-}

src/Graphics/TextureSlice.cs

@@ -14,8 +14,6 @@ namespace MoonWorks.Graphics
 		public uint Layer { get; }
 		public uint Level { get; }
 
-		public uint Size => (uint) (Rectangle.W * Rectangle.H * Texture.BytesPerPixel(Texture.Format) / Texture.BlockSizeSquared(Texture.Format));
-
 		public TextureSlice(Texture texture)
 		{
 			Texture = texture;

src/Graphics/Utility/Conversions.cs

@@ -1,13 +1,9 @@
 using System.Collections.Generic;
 using System.Runtime.InteropServices;
 using MoonWorks.Graphics;
-using MoonWorks.Graphics.PackedVector;
 
 namespace MoonWorks
 {
-	/// <summary>
-	/// Conversion utilities for interop.
-	/// </summary>
 	public static class Conversions
 	{
 		private readonly static Dictionary<VertexElementFormat, uint> Sizes = new Dictionary<VertexElementFormat, uint>

src/Graphics/VertexBindingAndAttributes.cs

@@ -1,8 +1,6 @@
 namespace MoonWorks.Graphics
 {
-	/// <summary>
-	/// A convenience structure for pairing a vertex binding with its associated attributes.
-	/// </summary>
+	// This is a convenience structure for pairing a vertex binding with its associated attributes.
 	public struct VertexBindingAndAttributes
 	{
 		public VertexBinding VertexBinding { get; }
@@ -14,9 +12,9 @@ namespace MoonWorks.Graphics
 			VertexAttributes = attributes;
 		}
 
-		public static VertexBindingAndAttributes Create<T>(uint bindingIndex, uint locationOffset = 0, VertexInputRate inputRate = VertexInputRate.Vertex) where T : unmanaged, IVertexType
+		public static VertexBindingAndAttributes Create<T>(uint bindingIndex) where T : unmanaged, IVertexType
 		{
-			VertexBinding binding = VertexBinding.Create<T>(bindingIndex, inputRate);
+			VertexBinding binding = VertexBinding.Create<T>(bindingIndex);
 			VertexAttribute[] attributes = new VertexAttribute[T.Formats.Length];
 			uint offset = 0;
 
@@ -27,7 +25,7 @@ namespace MoonWorks.Graphics
 				attributes[i] = new VertexAttribute
 				{
 					Binding = bindingIndex,
-					Location = locationOffset + i,
+					Location = i,
 					Format = format,
 					Offset = offset
 				};

src/Input/Axis.cs

@@ -3,9 +3,6 @@ using SDL2;
 
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// Represents a specific joystick direction on a gamepad.
-	/// </summary>
 	public class Axis
 	{
 		public Gamepad Parent { get; }

src/Input/AxisButtonCode.cs

@@ -1,8 +1,5 @@
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// Can be used to access a gamepad axis virtual button without a direct reference to the button object.
-	/// </summary>
 	public enum AxisButtonCode
 	{
 		LeftX_Left,

src/Input/AxisCode.cs

@@ -1,9 +1,6 @@
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// Can be used to access a gamepad axis without a direct reference to the axis object.
-	/// Enum values are equivalent to SDL_GameControllerAxis.
-	/// </summary>
+	// Enum values are equivalent to SDL GameControllerAxis
 	public enum AxisCode
 	{
 		LeftX,

src/Input/ButtonCode.cs

@@ -1,9 +1,6 @@
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// Can be used to access a gamepad button without a direct reference to the button object.
- 	/// Enum values are equivalent to the SDL GameControllerButton value.
-	/// </summary>
+	// Enum values are equivalent to the SDL GameControllerButton value.
 	public enum GamepadButtonCode
 	{
 		A,

src/Input/ButtonState.cs

@@ -1,40 +1,14 @@
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// Container for the current state of a binary input.
-	/// </summary>
 	public struct ButtonState
 	{
 		public ButtonStatus ButtonStatus { get; }
 
-		/// <summary>
-		/// True if the button was pressed this frame.
-		/// </summary>
 		public bool IsPressed => ButtonStatus == ButtonStatus.Pressed;
-
-		/// <summary>
-		/// True if the button was pressed this frame and the previous frame.
-		/// </summary>
 		public bool IsHeld => ButtonStatus == ButtonStatus.Held;
-
-		/// <summary>
-		/// True if the button was either pressed or continued to be held this frame.
-		/// </summary>
 		public bool IsDown => ButtonStatus == ButtonStatus.Pressed || ButtonStatus == ButtonStatus.Held;
-
-		/// <summary>
-		/// True if the button was let go this frame.
-		/// </summary>
 		public bool IsReleased => ButtonStatus == ButtonStatus.Released;
-
-		/// <summary>
-		/// True if the button was not pressed this frame or the previous frame.
-		/// </summary>
 		public bool IsIdle => ButtonStatus == ButtonStatus.Idle;
-
-		/// <summary>
-		/// True if the button was either idle or released this frame.
-		/// </summary>
 		public bool IsUp => ButtonStatus == ButtonStatus.Idle || ButtonStatus == ButtonStatus.Released;
 
 		public ButtonState(ButtonStatus buttonStatus)
@@ -69,7 +43,7 @@
 		}
 
 		/// <summary>
-		/// Combines two button states. Useful for alt control sets or input buffering.
+		/// Combines two button states. Useful for alt controls or input buffering.
 		/// </summary>
 		public static ButtonState operator |(ButtonState a, ButtonState b)
 		{

src/Input/ButtonStatus.cs

@@ -1,8 +1,5 @@
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// Represents the current status of a binary input.
-	/// </summary>
 	public enum ButtonStatus
 	{
 		/// <summary>

src/Input/DeviceKind.cs

@@ -0,0 +1,10 @@
+namespace MoonWorks.Input
+{
+    public enum DeviceKind
+    {
+		None,
+        Keyboard,
+        Mouse,
+        Gamepad,
+    }
+}

src/Input/Gamepad.cs

@@ -5,12 +5,6 @@ using SDL2;
 
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// A Gamepad input abstraction that represents input coming from a console controller or other such devices.
-	/// The button names map to a standard Xbox 360 controller.
-	/// For different controllers the relative position of the face buttons will determine the button mapping.
-	/// For example on a DualShock controller the Cross button will map to the A button.
-	/// </summary>
 	public class Gamepad
 	{
 		internal IntPtr Handle;
@@ -57,14 +51,7 @@ namespace MoonWorks.Input
 
 		public bool IsDummy => Handle == IntPtr.Zero;
 
-		/// <summary>
-		/// True if any input on the gamepad is active. Useful for input remapping.
-		/// </summary>
 		public bool AnyPressed { get; private set; }
-
-		/// <summary>
-		/// Contains a reference to an arbitrary VirtualButton that was pressed on the gamepad this frame. Useful for input remapping.
-		/// </summary>
 		public VirtualButton AnyPressedButton { get; private set; }
 
 		private Dictionary<SDL.SDL_GameControllerButton, GamepadButton> EnumToButton;
@@ -113,13 +100,13 @@ namespace MoonWorks.Input
 
 			LeftXLeft = new AxisButton(LeftX, false);
 			LeftXRight = new AxisButton(LeftX, true);
-			LeftYUp = new AxisButton(LeftY, true);
-			LeftYDown = new AxisButton(LeftY, false);
+			LeftYUp = new AxisButton(LeftY, false);
+			LeftYDown = new AxisButton(LeftY, true);
 
 			RightXLeft = new AxisButton(RightX, false);
 			RightXRight = new AxisButton(RightX, true);
-			RightYUp = new AxisButton(RightY, true);
-			RightYDown = new AxisButton(RightY, false);
+			RightYUp = new AxisButton(RightY, false);
+			RightYDown = new AxisButton(RightY, true);
 
 			TriggerLeft = new Trigger(this, TriggerCode.Left, SDL.SDL_GameControllerAxis.SDL_CONTROLLER_AXIS_TRIGGERLEFT);
 			TriggerRight = new Trigger(this, TriggerCode.Right, SDL.SDL_GameControllerAxis.SDL_CONTROLLER_AXIS_TRIGGERRIGHT);
@@ -208,20 +195,6 @@ namespace MoonWorks.Input
 			};
 		}
 
-		internal void Register(IntPtr handle)
-		{
-			Handle = handle;
-
-			IntPtr joystickHandle = SDL.SDL_GameControllerGetJoystick(Handle);
-			JoystickInstanceID = SDL.SDL_JoystickInstanceID(joystickHandle);
-		}
-
-		internal void Unregister()
-		{
-			Handle = IntPtr.Zero;
-			JoystickInstanceID = -1;
-		}
-
 		internal void Update()
 		{
 			AnyPressed = false;
@@ -280,25 +253,16 @@ namespace MoonWorks.Input
 			) == 0;
 		}
 
-		/// <summary>
-		/// Obtains a gamepad button object given a button code.
-		/// </summary>
 		public GamepadButton Button(GamepadButtonCode buttonCode)
 		{
 			return EnumToButton[(SDL.SDL_GameControllerButton) buttonCode];
 		}
 
-		/// <summary>
-		/// Obtains an axis button object given a button code.
-		/// </summary>
 		public AxisButton Button(AxisButtonCode axisButtonCode)
 		{
 			return AxisButtonCodeToAxisButton[axisButtonCode];
 		}
 
-		/// <summary>
-		/// Obtains a trigger button object given a button code.
-		/// </summary>
 		public TriggerButton Button(TriggerCode triggerCode)
 		{
 			return TriggerCodeToTriggerButton[triggerCode];

src/Input/Input.cs

@@ -3,65 +3,31 @@ using System;
 
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// The main container class for all input tracking.
-	/// Your Game class will automatically have a reference to this class.
-	/// </summary>
 	public class Inputs
 	{
 		public const int MAX_GAMEPADS = 4;
 
-		/// <summary>
-		/// The reference to the Keyboard input abstraction.
-		/// </summary>
 		public Keyboard Keyboard { get; }
-
-		/// <summary>
-		/// The reference to the Mouse input abstraction.
-		/// </summary>
 		public Mouse Mouse { get; }
 
-		Gamepad[] Gamepads;
+		Gamepad[] gamepads;
 
 		public static event Action<char> TextInput;
 
-		/// <summary>
-		/// True if any input on any input device is active. Useful for input remapping.
-		/// </summary>
 		public bool AnyPressed { get; private set; }
-
-		/// <summary>
-		/// Contains a reference to an arbitrary VirtualButton that was pressed this frame. Useful for input remapping.
-		/// </summary>
 		public VirtualButton AnyPressedButton { get; private set; }
 
-		public delegate void OnGamepadConnectedFunc(int slot);
-
-		/// <summary>
-		/// Called when a gamepad has been connected.
-		/// </summary>
-		/// <param name="slot">The slot where the connection occurred.</param>
-		public OnGamepadConnectedFunc OnGamepadConnected = delegate { };
-
-		public delegate void OnGamepadDisconnectedFunc(int slot);
-
-		/// <summary>
-		/// Called when a gamepad has been disconnected.
-		/// </summary>
-		/// <param name="slot">The slot where the disconnection occurred.</param>
-		public OnGamepadDisconnectedFunc OnGamepadDisconnected = delegate { };
-
 		internal Inputs()
 		{
 			Keyboard = new Keyboard();
 			Mouse = new Mouse();
 
-			Gamepads = new Gamepad[MAX_GAMEPADS];
+			gamepads = new Gamepad[MAX_GAMEPADS];
 
 			// initialize dummy controllers
 			for (var slot = 0; slot < MAX_GAMEPADS; slot += 1)
 			{
-				Gamepads[slot] = new Gamepad(IntPtr.Zero, slot);
+				gamepads[slot] = new Gamepad(IntPtr.Zero, slot);
 			}
 		}
 
@@ -87,7 +53,7 @@ namespace MoonWorks.Input
 				AnyPressedButton = Mouse.AnyPressedButton;
 			}
 
-			foreach (var gamepad in Gamepads)
+			foreach (var gamepad in gamepads)
 			{
 				gamepad.Update();
 
@@ -99,11 +65,6 @@ namespace MoonWorks.Input
 			}
 		}
 
-		/// <summary>
-		/// Returns true if a gamepad is currently connected in the given slot.
-		/// </summary>
-		/// <param name="slot">Range: 0-3</param>
-		/// <returns></returns>
 		public bool GamepadExists(int slot)
 		{
 			if (slot < 0 || slot >= MAX_GAMEPADS)
@@ -111,19 +72,13 @@ namespace MoonWorks.Input
 				return false;
 			}
 
-			return !Gamepads[slot].IsDummy;
+			return !gamepads[slot].IsDummy;
 		}
 
-		/// <summary>
-		/// Gets a gamepad associated with the given slot.
-		/// The first n slots are guaranteed to occupied with gamepads if they are connected.
-		/// If a gamepad does not exist for the given slot, a dummy object with all inputs in default state will be returned.
-		/// You can check if a gamepad is connected in a slot with the GamepadExists function.
-		/// </summary>
-		/// <param name="slot">Range: 0-3</param>
+		// From 0-4
 		public Gamepad GetGamepad(int slot)
 		{
-			return Gamepads[slot];
+			return gamepads[slot];
 		}
 
 		internal void AddGamepad(int index)
@@ -132,40 +87,24 @@ namespace MoonWorks.Input
 			{
 				if (!GamepadExists(slot))
 				{
-					var openResult = SDL.SDL_GameControllerOpen(index);
-					if (openResult == 0)
-					{
-						Logger.LogError("Error opening gamepad!");
-						Logger.LogError(SDL.SDL_GetError());
-					}
-					else
-					{
-						Gamepads[slot].Register(openResult);
-						Logger.LogInfo($"Gamepad added to slot {slot}!");
-
-						if (OnGamepadConnected != null)
-						{
-							OnGamepadConnected(slot);
-						}
-					}
-
+					gamepads[slot].Handle = SDL.SDL_GameControllerOpen(index);
+					System.Console.WriteLine($"Gamepad added to slot {slot}!");
 					return;
 				}
 			}
 
-			Logger.LogInfo("Too many gamepads already!");
+			System.Console.WriteLine("Too many gamepads already!");
 		}
 
 		internal void RemoveGamepad(int joystickInstanceID)
 		{
 			for (int slot = 0; slot < MAX_GAMEPADS; slot += 1)
 			{
-				if (joystickInstanceID == Gamepads[slot].JoystickInstanceID)
+				if (joystickInstanceID == gamepads[slot].JoystickInstanceID)
 				{
-					SDL.SDL_GameControllerClose(Gamepads[slot].Handle);
-					Gamepads[slot].Unregister();
-					Logger.LogInfo($"Removing gamepad from slot {slot}!");
-					OnGamepadDisconnected(slot);
+					SDL.SDL_GameControllerClose(gamepads[slot].Handle);
+					gamepads[slot].Handle = IntPtr.Zero;
+					System.Console.WriteLine($"Removing gamepad from slot {slot}!");
 					return;
 				}
 			}

src/Input/KeyCode.cs

@@ -1,9 +1,6 @@
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// Can be used to determine key state without a direct reference to the virtual button object.
-	/// Enum values are equivalent to the SDL Scancode value.
-	/// </summary>
+	// Enum values are equivalent to the SDL Scancode value.
 	public enum KeyCode : int
 	{
 		Unknown = 0,

src/Input/Keyboard.cs

@@ -4,22 +4,12 @@ using SDL2;
 
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// The keyboard input device abstraction.
-	/// </summary>
 	public class Keyboard
 	{
-		/// <summary>
-		/// True if any button on the keyboard is active. Useful for input remapping.
-		/// </summary>
 		public bool AnyPressed { get; private set; }
-
-		/// <summary>
-		/// Contains a reference to an arbitrary KeyboardButton that was pressed this frame. Useful for input remapping.
-		/// </summary>
 		public KeyboardButton AnyPressedButton { get; private set; }
 
-		internal IntPtr State { get; private set; }
+		public IntPtr State { get; private set; }
 
 		private KeyCode[] KeyCodes;
 		private KeyboardButton[] Keys { get; }
@@ -88,65 +78,41 @@ namespace MoonWorks.Input
 			}
 		}
 
-		/// <summary>
-		/// True if the button was pressed this frame.
-		/// </summary>
 		public bool IsPressed(KeyCode keycode)
 		{
 			return Keys[(int) keycode].IsPressed;
 		}
 
-		/// <summary>
-		/// True if the button was pressed this frame and the previous frame.
-		/// </summary>
 		public bool IsHeld(KeyCode keycode)
 		{
 			return Keys[(int) keycode].IsHeld;
 		}
 
-		/// <summary>
-		/// True if the button was either pressed or continued to be held this frame.
-		/// </summary>
 		public bool IsDown(KeyCode keycode)
 		{
 			return Keys[(int) keycode].IsDown;
 		}
 
-		/// <summary>
-		/// True if the button was let go this frame.
-		/// </summary>
 		public bool IsReleased(KeyCode keycode)
 		{
 			return Keys[(int) keycode].IsReleased;
 		}
 
-		/// <summary>
-		/// True if the button was not pressed this frame or the previous frame.
-		/// </summary>
 		public bool IsIdle(KeyCode keycode)
 		{
 			return Keys[(int) keycode].IsIdle;
 		}
 
-		/// <summary>
-		/// True if the button was either idle or released this frame.
-		/// </summary>
 		public bool IsUp(KeyCode keycode)
 		{
 			return Keys[(int) keycode].IsUp;
 		}
 
-		/// <summary>
-		/// Gets a reference to a keyboard button object using a key code.
-		/// </summary>
 		public KeyboardButton Button(KeyCode keycode)
 		{
 			return Keys[(int) keycode];
 		}
 
-		/// <summary>
-		/// Gets the state of a keyboard button from a key code.
-		/// </summary>
 		public ButtonState ButtonState(KeyCode keycode)
 		{
 			return Keys[(int) keycode].State;

src/Input/Mouse.cs

@@ -3,9 +3,6 @@ using SDL2;
 
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// The mouse input device abstraction.
-	/// </summary>
 	public class Mouse
 	{
 		public MouseButton LeftButton { get; }
@@ -24,23 +21,12 @@ namespace MoonWorks.Input
 		internal int WheelRaw;
 		private int previousWheelRaw = 0;
 
-		/// <summary>
-		/// True if any button on the keyboard is active. Useful for input remapping.
-		/// </summary>
 		public bool AnyPressed { get; private set; }
-
-		/// <summary>
-		/// Contains a reference to an arbitrary MouseButton that was pressed this frame. Useful for input remapping.
-		/// </summary>
 		public MouseButton AnyPressedButton { get; private set; }
 
-		internal uint ButtonMask { get; private set; }
+		public uint ButtonMask { get; private set; }
 
 		private bool relativeMode;
-		/// <summary>
-		/// If set to true, the cursor is hidden, the mouse position is constrained to the window,
-		/// and relative mouse motion will be reported even if the mouse is at the edge of the window.
-		/// </summary>
 		public bool RelativeMode
 		{
 			get => relativeMode;
@@ -55,23 +41,9 @@ namespace MoonWorks.Input
 			}
 		}
 
-		private bool hidden;
-		/// <summary>
-		/// If set to true, the OS cursor will not be shown in your application window.
-		/// </summary>
-		public bool Hidden
-		{
-			get => hidden;
-			set
-			{
-				hidden = value;
-				SDL.SDL_ShowCursor(hidden ? SDL.SDL_DISABLE : SDL.SDL_ENABLE);
-			}
-		}
-
 		private readonly Dictionary<MouseButtonCode, MouseButton> CodeToButton;
 
-		internal Mouse()
+		public Mouse()
 		{
 			LeftButton = new MouseButton(this, MouseButtonCode.Left, SDL.SDL_BUTTON_LMASK);
 			MiddleButton = new MouseButton(this, MouseButtonCode.Middle, SDL.SDL_BUTTON_MMASK);
@@ -116,17 +88,6 @@ namespace MoonWorks.Input
 			}
 		}
 
-		/// <summary>
-		/// Gets a button from the mouse given a MouseButtonCode.
-		/// </summary>
-		public MouseButton Button(MouseButtonCode buttonCode)
-		{
-			return CodeToButton[buttonCode];
-		}
-
-		/// <summary>
-		/// Gets a button state from a mouse button corresponding to the given MouseButtonCode.
-		/// </summary>
 		public ButtonState ButtonState(MouseButtonCode buttonCode)
 		{
 			return CodeToButton[buttonCode].State;

src/Input/MouseButtonCode.cs

@@ -1,8 +1,5 @@
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// Can be used to determine virtual mouse button state without a direct reference to the button object.
-	/// </summary>
 	public enum MouseButtonCode
 	{
 		Left,

src/Input/Trigger.cs

@@ -3,9 +3,6 @@ using SDL2;
 
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// Represents a trigger input on a gamepad.
-	/// </summary>
 	public class Trigger
 	{
 		public Gamepad Parent { get; }

src/Input/TriggerCode.cs

@@ -1,9 +1,6 @@
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// Can be used to determine trigger state or trigger virtual button state without direct reference to the trigger object or virtual button object.
-	/// Enum values correspond to SDL_GameControllerAxis.
-	/// </summary>
+	// Enum values correspond to SDL GameControllerAxis
 	public enum TriggerCode
 	{
 		Left = 4,

src/Input/VirtualButton.cs

@@ -1,8 +1,5 @@
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// VirtualButtons map inputs to binary inputs, like a trigger threshold or joystick axis threshold.
-	/// </summary>
 	public abstract class VirtualButton
 	{
 		public ButtonState State { get; protected set; }

src/Input/VirtualButtons/AxisButton.cs

@@ -1,15 +1,11 @@
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// A virtual button corresponding to a direction on a joystick.
-	/// If the axis value exceeds the threshold, it will be treated as a press.
-	/// </summary>
 	public class AxisButton : VirtualButton
 	{
 		public Axis Parent { get; }
 		public AxisButtonCode Code { get; }
 
-		private float threshold = 0.5f;
+		private float threshold = 0.9f;
 		public float Threshold
 		{
 			get => threshold;

src/Input/VirtualButtons/EmptyButton.cs

@@ -1,8 +1,5 @@
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// A dummy button that can never be pressed. Used for the dummy gamepad.
-	/// </summary>
 	public class EmptyButton : VirtualButton
 	{
 		internal override bool CheckPressed()

src/Input/VirtualButtons/GamepadButton.cs

@@ -2,9 +2,6 @@ using SDL2;
 
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// A virtual button corresponding to a gamepad button.
-	/// </summary>
 	public class GamepadButton : VirtualButton
 	{
 		public Gamepad Parent { get; }

src/Input/VirtualButtons/KeyboardButton.cs

@@ -1,12 +1,11 @@
+using System.Runtime.InteropServices;
+
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// A virtual button corresponding to a keyboard button.
-	/// </summary>
 	public class KeyboardButton : VirtualButton
 	{
 		Keyboard Parent;
-		public KeyCode KeyCode { get; }
+		KeyCode KeyCode;
 
 		internal KeyboardButton(Keyboard parent, KeyCode keyCode)
 		{
@@ -14,9 +13,9 @@ namespace MoonWorks.Input
 			KeyCode = keyCode;
 		}
 
-		internal unsafe override bool CheckPressed()
+		internal override bool CheckPressed()
 		{
-			return Conversions.ByteToBool(((byte*) Parent.State)[(int) KeyCode]);
+			return Conversions.ByteToBool(Marshal.ReadByte(Parent.State, (int) KeyCode));
 		}
 	}
 }

src/Input/VirtualButtons/MouseButton.cs

@@ -1,8 +1,5 @@
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// A virtual button corresponding to a mouse button.
-	/// </summary>
 	public class MouseButton : VirtualButton
 	{
 		Mouse Parent;

src/Input/VirtualButtons/TriggerButton.cs

@@ -1,9 +1,5 @@
 namespace MoonWorks.Input
 {
-	/// <summary>
-	/// A virtual button corresponding to a trigger on a gamepad.
-	/// If the trigger value exceeds the threshold, it will be treated as a press.
-	/// </summary>
 	public class TriggerButton : VirtualButton
 	{
 		public Trigger Parent { get; }

src/Logger.cs

@@ -5,9 +5,9 @@ namespace MoonWorks
 {
 	public static class Logger
 	{
-		public static Action<string> LogInfo = LogInfoDefault;
-		public static Action<string> LogWarn = LogWarnDefault;
-		public static Action<string> LogError = LogErrorDefault;
+		public static Action<string> LogInfo;
+		public static Action<string> LogWarn;
+		public static Action<string> LogError;
 
 		private static RefreshCS.Refresh.Refresh_LogFunc LogInfoFunc = RefreshLogInfo;
 		private static RefreshCS.Refresh.Refresh_LogFunc LogWarnFunc = RefreshLogWarn;
@@ -15,6 +15,19 @@ namespace MoonWorks
 
 		internal static void Initialize()
 		{
+			if (Logger.LogInfo == null)
+			{
+				Logger.LogInfo = Console.WriteLine;
+			}
+			if (Logger.LogWarn == null)
+			{
+				Logger.LogWarn = Console.WriteLine;
+			}
+			if (Logger.LogError == null)
+			{
+				Logger.LogError = Console.WriteLine;
+			}
+
 			Refresh.Refresh_HookLogFunctions(
 				LogInfoFunc,
 				LogWarnFunc,
@@ -22,30 +35,6 @@ namespace MoonWorks
 			);
 		}
 
-		private static void LogInfoDefault(string str)
-		{
-			Console.ForegroundColor = ConsoleColor.Green;
-			Console.Write("INFO: ");
-			Console.ForegroundColor = ConsoleColor.White;
-			Console.WriteLine(str);
-		}
-
-		private static void LogWarnDefault(string str)
-		{
-			Console.ForegroundColor = ConsoleColor.Yellow;
-			Console.Write("WARN: ");
-			Console.ForegroundColor = ConsoleColor.White;
-			Console.WriteLine(str);
-		}
-
-		private static void LogErrorDefault(string str)
-		{
-			Console.ForegroundColor = ConsoleColor.Red;
-			Console.Write("ERROR: ");
-			Console.ForegroundColor = ConsoleColor.White;
-			Console.WriteLine(str);
-		}
-
 		private static void RefreshLogInfo(IntPtr msg)
 		{
 			LogInfo(UTF8_ToManaged(msg));

src/Math/Fixed/Fix64.cs

@@ -7,7 +7,7 @@ namespace MoonWorks.Math.Fixed
 {
 	public struct Fix64 : IEquatable<Fix64>, IComparable<Fix64>
 	{
-		public long RawValue { get; }
+		private readonly long RawValue;
 
 		const long MAX_VALUE = long.MaxValue;
 		const long MIN_VALUE = long.MinValue;
@@ -17,9 +17,6 @@ namespace MoonWorks.Math.Fixed
 		const long PI_TIMES_2 = 0x6487ED511;
 		const long PI = 0x3243F6A88;
 		const long PI_OVER_2 = 0x1921FB544;
-		const long LN2 = 0xB17217F7;
-		const long LOG2MAX = 0x1F00000000;
-		const long LOG2MIN = -0x2000000000;
 
 		public static readonly Fix64 MaxValue = new Fix64(MAX_VALUE);
 		public static readonly Fix64 MinValue = new Fix64(MIN_VALUE);
@@ -31,10 +28,6 @@ namespace MoonWorks.Math.Fixed
 		public static readonly Fix64 PiOver4 = PiOver2 / new Fix64(2);
 		public static readonly Fix64 PiTimes2 = new Fix64(PI_TIMES_2);
 
-		static readonly Fix64 Ln2 = new Fix64(LN2);
-		static readonly Fix64 Log2Max = new Fix64(LOG2MAX);
-		static readonly Fix64 Log2Min = new Fix64(LOG2MIN);
-
 		const int LUT_SIZE = (int)(PI_OVER_2 >> 15);
 		static readonly Fix64 LutInterval = (Fix64)(LUT_SIZE - 1) / PiOver2;
 
@@ -59,11 +52,6 @@ namespace MoonWorks.Math.Fixed
 			return new Fix64(numerator) / new Fix64(denominator);
 		}
 
-		public static Fix64 FromRawValue(long value)
-		{
-			return new Fix64(value);
-		}
-
 		/// <summary>
 		/// Gets the fractional component of this Fix64 value.
 		/// </summary>
@@ -72,6 +60,30 @@ namespace MoonWorks.Math.Fixed
 			return new Fix64(number.RawValue & 0x00000000FFFFFFFF);
 		}
 
+		public static Fix64 Random(System.Random random, int max)
+		{
+			return new Fix64(random.NextInt64(new Fix64(max).RawValue));
+		}
+
+		public static Fix64 Random(System.Random random, Fix64 max)
+		{
+			return new Fix64(random.NextInt64(max.RawValue));
+		}
+
+		public static Fix64 Random(System.Random random, Fix64 min, Fix64 max)
+		{
+			return new Fix64(random.NextInt64(min.RawValue, max.RawValue));
+		}
+
+		// Max should be between 0.0 and 1.0.
+		public static Fix64 RandomFraction(System.Random random, Fix64 max)
+		{
+			long fractionalPart = (max.RawValue & 0x00000000FFFFFFFF);
+			long fractional = random.NextInt64(fractionalPart);
+
+			return new Fix64(fractional);
+		}
+
 		/// <summary>
 		/// Returns an int indicating the sign of a Fix64 number.
 		/// </summary>
@@ -200,145 +212,7 @@ namespace MoonWorks.Math.Fixed
 			return Fix64.Floor(value / step) * step;
 		}
 
-		// Exponentiation functions
-
-		/// <summary>
-		/// Returns 2 raised to the specified power.
-		/// Provides at least 6 decimals of accuracy.
-		/// </summary>
-		internal static Fix64 Pow2(Fix64 x)
-		{
-			if (x.RawValue == 0)
-			{
-				return One;
-			}
-
-			// Avoid negative arguments by exploiting that exp(-x) = 1/exp(x).
-			bool neg = x.RawValue < 0;
-			if (neg)
-			{
-				x = -x;
-			}
-
-			if (x == One)
-			{
-				return neg ? One / (Fix64)2 : (Fix64)2;
-			}
-			if (x >= Log2Max)
-			{
-				return neg ? One / MaxValue : MaxValue;
-			}
-			if (x <= Log2Min)
-			{
-				return neg ? MaxValue : Zero;
-			}
-
-			/* The algorithm is based on the power series for exp(x):
-			 * http://en.wikipedia.org/wiki/Exponential_function#Formal_definition
-			 *
-			 * From term n, we get term n+1 by multiplying with x/n.
-			 * When the sum term drops to zero, we can stop summing.
-			 */
-
-			int integerPart = (int)Floor(x);
-			// Take fractional part of exponent
-			x = new Fix64(x.RawValue & 0x00000000FFFFFFFF);
-
-			var result = One;
-			var term = One;
-			int i = 1;
-			while (term.RawValue != 0)
-			{
-				term = FastMul(FastMul(x, term), Ln2) / (Fix64)i;
-				result += term;
-				i++;
-			}
-
-			result = new Fix64(result.RawValue << integerPart);
-			if (neg)
-			{
-				result = One / result;
-			}
-
-			return result;
-		}
-
-		/// <summary>
-		/// Returns the base-2 logarithm of a specified number.
-		/// Provides at least 9 decimals of accuracy.
-		/// </summary>
-		/// <exception cref="ArgumentOutOfRangeException">
-		/// The argument was non-positive
-		/// </exception>
-		internal static Fix64 Log2(Fix64 x)
-		{
-			if (x.RawValue <= 0)
-			{
-				throw new ArgumentOutOfRangeException("Non-positive value passed to Ln", "x");
-			}
-
-			// This implementation is based on Clay. S. Turner's fast binary logarithm
-			// algorithm (C. S. Turner,  "A Fast Binary Logarithm Algorithm", IEEE Signal
-			//     Processing Mag., pp. 124,140, Sep. 2010.)
-
-			long b = 1U << (FRACTIONAL_PLACES - 1);
-			long y = 0;
-
-			long rawX = x.RawValue;
-			while (rawX < ONE)
-			{
-				rawX <<= 1;
-				y -= ONE;
-			}
-
-			while (rawX >= (ONE << 1))
-			{
-				rawX >>= 1;
-				y += ONE;
-			}
-
-			var z = new Fix64(rawX);
-
-			for (int i = 0; i < FRACTIONAL_PLACES; i++)
-			{
-				z = FastMul(z, z);
-				if (z.RawValue >= (ONE << 1))
-				{
-					z = new Fix64(z.RawValue >> 1);
-					y += b;
-				}
-				b >>= 1;
-			}
-
-			return new Fix64(y);
-		}
-
-		public static Fix64 Pow(Fix64 b, Fix64 exp)
-		{
-			if (b == One)
-			{
-				return One;
-			}
-			if (exp.RawValue == 0)
-			{
-				return One;
-			}
-			if (exp.RawValue == ONE)
-			{
-				return b;
-			}
-			if (b.RawValue == 0)
-			{
-				if (exp.RawValue < 0)
-				{
-					throw new DivideByZeroException();
-				}
-				return Zero;
-			}
-
-			Fix64 log2 = Log2(b);
-			return Pow2(exp * log2);
-		}
+		// Trigonometry functions
 
 		/// <summary>
 		/// Returns the square root of the given Fix64 value.

src/Math/Fixed/Matrix4x4.cs

@@ -996,8 +996,8 @@ namespace MoonWorks.Math.Fixed
 			z = Vector3.Normalize(forward);
 			Vector3.Cross(ref forward, ref up, out x);
 			Vector3.Cross(ref x, ref forward, out y);
-			x = Vector3.Normalize(x);
-			y = Vector3.Normalize(y);
+			x.Normalize();
+			y.Normalize();
 
 			result = new Matrix4x4();
 			result.Right = x;

src/Math/Fixed/Quaternion.cs

@@ -214,6 +214,23 @@ namespace MoonWorks.Math.Fixed
 			);
 		}
 
+		/// <summary>
+		/// Scales the quaternion magnitude to unit length.
+		/// </summary>
+		public void Normalize()
+		{
+			Fix64 num = Fix64.One / (Fix64.Sqrt(
+				(X * X) +
+				(Y * Y) +
+				(Z * Z) +
+				(W * W)
+			));
+			this.X *= num;
+			this.Y *= num;
+			this.Z *= num;
+			this.W *= num;
+		}
+
 		/// <summary>
 		/// Returns a <see cref="String"/> representation of this <see cref="Quaternion"/> in the format:
 		/// {X:[<see cref="X"/>] Y:[<see cref="Y"/>] Z:[<see cref="Z"/>] W:[<see cref="W"/>]}
@@ -742,16 +759,12 @@ namespace MoonWorks.Math.Fixed
 		/// <param name="result">The unit length quaternion an output parameter.</param>
 		public static void Normalize(ref Quaternion quaternion, out Quaternion result)
 		{
-			Fix64 lengthSquared = (quaternion.X * quaternion.X) + (quaternion.Y * quaternion.Y) +
-			                      (quaternion.Z * quaternion.Z) + (quaternion.W * quaternion.W);
-
-			if (lengthSquared == Fix64.Zero)
-			{
-				result = Identity;
-				return;
-			}
-
-			Fix64 num = Fix64.One / Fix64.Sqrt(lengthSquared);
+			Fix64 num = Fix64.One / (Fix64.Sqrt(
+				(quaternion.X * quaternion.X) +
+				(quaternion.Y * quaternion.Y) +
+				(quaternion.Z * quaternion.Z) +
+				(quaternion.W * quaternion.W)
+			));
 			result.X = quaternion.X * num;
 			result.Y = quaternion.Y * num;
 			result.Z = quaternion.Z * num;

src/Math/Fixed/Transform2D.cs

@@ -0,0 +1,105 @@
+namespace MoonWorks.Math.Fixed
+{
+	public struct Transform2D : System.IEquatable<Transform2D>
+	{
+		public Vector2 Position { get; }
+		public Fix64 Rotation { get; }
+		public Vector2 Scale { get; }
+
+		private bool transformMatrixCalculated;
+		private Matrix3x2 transformMatrix;
+
+		public Matrix3x2 TransformMatrix
+		{
+			get
+			{
+				if (!transformMatrixCalculated)
+				{
+					transformMatrix = CreateTransformMatrix(Position, Rotation, Scale);
+					transformMatrixCalculated = true;
+				}
+
+				return transformMatrix;
+			}
+		}
+
+		public bool IsAxisAligned => Rotation % Fix64.PiOver2 == Fix64.Zero;
+		public bool IsUniformScale => Scale.X == Scale.Y;
+
+		public static readonly Transform2D Identity = new Transform2D(Vector2.Zero, Fix64.Zero, Vector2.One);
+
+		public Transform2D(Vector2 position)
+		{
+			Position = position;
+			Rotation = Fix64.Zero;
+			Scale = Vector2.One;
+			transformMatrixCalculated = false;
+			transformMatrix = Matrix3x2.Identity;
+		}
+
+		public Transform2D(Vector2 position, Fix64 rotation)
+		{
+			Position = position;
+			Rotation = rotation;
+			Scale = Vector2.One;
+			transformMatrixCalculated = false;
+			transformMatrix = Matrix3x2.Identity;
+		}
+
+		public Transform2D(Vector2 position, Fix64 rotation, Vector2 scale)
+		{
+			Position = position;
+			Rotation = rotation;
+			Scale = scale;
+			transformMatrixCalculated = false;
+			transformMatrix = Matrix3x2.Identity;
+		}
+
+		public Transform2D Compose(Transform2D other)
+		{
+			return new Transform2D(Position + other.Position, Rotation + other.Rotation, Scale * other.Scale);
+		}
+
+		private static Matrix3x2 CreateTransformMatrix(Vector2 position, Fix64 rotation, Vector2 scale)
+		{
+			return
+				Matrix3x2.CreateScale(scale) *
+				Matrix3x2.CreateRotation(rotation) *
+				Matrix3x2.CreateTranslation(position);
+		}
+
+		public bool Equals(Transform2D other)
+		{
+			return
+				Position == other.Position &&
+				Rotation == other.Rotation &&
+				Scale == other.Scale;
+		}
+
+
+        public override bool Equals(System.Object other)
+        {
+            if (other is Transform2D otherTransform)
+            {
+                return Equals(otherTransform);
+            }
+
+            return false;
+        }
+
+		public override int GetHashCode()
+		{
+			return System.HashCode.Combine(Position, Rotation, Scale);
+		}
+
+		public static bool operator ==(Transform2D a, Transform2D b)
+		{
+			return a.Equals(b);
+		}
+
+		public static bool operator !=(Transform2D a, Transform2D b)
+		{
+			return !a.Equals(b);
+		}
+	}
+}

src/Math/Fixed/Vector2.cs

@@ -200,6 +200,16 @@ namespace MoonWorks.Math.Fixed
 			return (X * X) + (Y * Y);
 		}
 
+		/// <summary>
+		/// Turns this <see cref="Vector2"/> to a unit vector with the same direction.
+		/// </summary>
+		public void Normalize()
+		{
+			Fix64 val = Fix64.One / Fix64.Sqrt((X * X) + (Y * Y));
+			X *= val;
+			Y *= val;
+		}
+
 		/// <summary>
 		/// Turns this <see cref="Vector2"/> to an angle in radians.
 		/// </summary>
@@ -413,14 +423,7 @@ namespace MoonWorks.Math.Fixed
 		/// <returns>Unit vector.</returns>
 		public static Vector2 Normalize(Vector2 value)
 		{
-			Fix64 lengthSquared = (value.X * value.X) + (value.Y * value.Y);
-
-			if (lengthSquared == Fix64.Zero)
-			{
-				return Zero;
-			}
-
-			Fix64 val = Fix64.One / Fix64.Sqrt(lengthSquared);
+			Fix64 val = Fix64.One / Fix64.Sqrt((value.X * value.X) + (value.Y * value.Y));
 			value.X *= val;
 			value.Y *= val;
 			return value;

src/Math/Fixed/Vector3.cs

@@ -309,6 +309,21 @@ namespace MoonWorks.Math.Fixed
 			return (X * X) + (Y * Y) + (Z * Z);
 		}
 
+		/// <summary>
+		/// Turns this <see cref="Vector3"/> to a unit vector with the same direction.
+		/// </summary>
+		public void Normalize()
+		{
+			Fix64 factor = Fix64.One / Fix64.Sqrt(
+				(X * X) +
+				(Y * Y) +
+				(Z * Z)
+			);
+			X *= factor;
+			Y *= factor;
+			Z *= factor;
+		}
+
 		/// <summary>
 		/// Returns a <see cref="String"/> representation of this <see cref="Vector3"/> in the format:
 		/// {X:[<see cref="X"/>] Y:[<see cref="Y"/>] Z:[<see cref="Z"/>]}
@@ -718,14 +733,11 @@ namespace MoonWorks.Math.Fixed
 		/// <returns>Unit vector.</returns>
 		public static Vector3 Normalize(Vector3 value)
 		{
-			Fix64 lengthSquared = (value.X * value.X) + (value.Y * value.Y) + (value.Z * value.Z);
-
-			if (lengthSquared == Fix64.Zero)
-			{
-				return Zero;
-			}
-
-			Fix64 factor = Fix64.One / Fix64.Sqrt(lengthSquared);
+			Fix64 factor = Fix64.One / Fix64.Sqrt(
+				(value.X * value.X) +
+				(value.Y * value.Y) +
+				(value.Z * value.Z)
+			);
 			return new Vector3(
 				value.X * factor,
 				value.Y * factor,

src/Math/Float/Matrix4x4.cs

@@ -611,7 +611,7 @@ namespace MoonWorks.Math.Float
 				);
 			}
 			Vector3.Cross(ref cameraUpVector, ref vector, out vector3);
-			vector3 = Vector3.Normalize(vector3);
+			vector3.Normalize();
 			Vector3.Cross(ref vector, ref vector3, out vector2);
 			result.M11 = vector3.X;
 			result.M12 = vector3.Y;
@@ -730,16 +730,16 @@ namespace MoonWorks.Math.Float
 						Vector3.Forward;
 				}
 				Vector3.Cross(ref rotateAxis, ref vector, out vector3);
-				vector3 = Vector3.Normalize(vector3);
+				vector3.Normalize();
 				Vector3.Cross(ref vector3, ref rotateAxis, out vector);
-				vector = Vector3.Normalize(vector);
+				vector.Normalize();
 			}
 			else
 			{
 				Vector3.Cross(ref rotateAxis, ref vector2, out vector3);
-				vector3 = Vector3.Normalize(vector3);
+				vector3.Normalize();
 				Vector3.Cross(ref vector3, ref vector4, out vector);
-				vector = Vector3.Normalize(vector);
+				vector.Normalize();
 			}
 
 			result.M11 = vector3.X;
@@ -1701,8 +1701,8 @@ namespace MoonWorks.Math.Float
 			Vector3.Normalize(ref forward, out z);
 			Vector3.Cross(ref forward, ref up, out x);
 			Vector3.Cross(ref x, ref forward, out y);
-			x = Vector3.Normalize(x);
-			y = Vector3.Normalize(y);
+			x.Normalize();
+			y.Normalize();
 
 			result = new Matrix4x4();
 			result.Right = x;

src/Math/Float/Transform2D.cs

@@ -0,0 +1,105 @@
+namespace MoonWorks.Math.Float
+{
+	public struct Transform2D : System.IEquatable<Transform2D>
+	{
+		public Vector2 Position { get; }
+		public float Rotation { get; }
+		public Vector2 Scale { get; }
+
+		private bool transformMatrixCalculated;
+		private Matrix3x2 transformMatrix;
+
+		public Matrix3x2 TransformMatrix
+		{
+			get
+			{
+				if (!transformMatrixCalculated)
+				{
+					transformMatrix = CreateTransformMatrix(Position, Rotation, Scale);
+					transformMatrixCalculated = true;
+				}
+
+				return transformMatrix;
+			}
+		}
+
+		public bool IsAxisAligned => Rotation % MathHelper.PiOver2 == 0;
+		public bool IsUniformScale => Scale.X == Scale.Y;
+
+		public static readonly Transform2D Identity = new Transform2D(Vector2.Zero, 0, Vector2.One);
+
+		public Transform2D(Vector2 position)
+		{
+			Position = position;
+			Rotation = 0;
+			Scale = Vector2.One;
+			transformMatrixCalculated = false;
+			transformMatrix = Matrix3x2.Identity;
+		}
+
+		public Transform2D(Vector2 position, float rotation)
+		{
+			Position = position;
+			Rotation = rotation;
+			Scale = Vector2.One;
+			transformMatrixCalculated = false;
+			transformMatrix = Matrix3x2.Identity;
+		}
+
+		public Transform2D(Vector2 position, float rotation, Vector2 scale)
+		{
+			Position = position;
+			Rotation = rotation;
+			Scale = scale;
+			transformMatrixCalculated = false;
+			transformMatrix = Matrix3x2.Identity;
+		}
+
+		public Transform2D Compose(Transform2D other)
+		{
+			return new Transform2D(Position + other.Position, Rotation + other.Rotation, Scale * other.Scale);
+		}
+
+		private static Matrix3x2 CreateTransformMatrix(Vector2 position, float rotation, Vector2 scale)
+		{
+			return
+				Matrix3x2.CreateScale(scale) *
+				Matrix3x2.CreateRotation(rotation) *
+				Matrix3x2.CreateTranslation(position);
+		}
+
+		public bool Equals(Transform2D other)
+		{
+			return
+				Position == other.Position &&
+				Rotation == other.Rotation &&
+				Scale == other.Scale;
+		}
+
+
+        public override bool Equals(System.Object other)
+        {
+            if (other is Transform2D otherTransform)
+            {
+                return Equals(otherTransform);
+            }
+
+            return false;
+        }
+
+		public override int GetHashCode()
+		{
+			return System.HashCode.Combine(Position, Rotation, Scale);
+		}
+
+		public static bool operator ==(Transform2D a, Transform2D b)
+		{
+			return a.Equals(b);
+		}
+
+		public static bool operator !=(Transform2D a, Transform2D b)
+		{
+			return !a.Equals(b);
+		}
+	}
+}

src/Math/Float/Vector2.cs

@@ -194,6 +194,16 @@ namespace MoonWorks.Math.Float
 			return (X * X) + (Y * Y);
 		}
 
+		/// <summary>
+		/// Turns this <see cref="Vector2"/> to a unit vector with the same direction.
+		/// </summary>
+		public void Normalize()
+		{
+			float val = 1.0f / (float) System.Math.Sqrt((X * X) + (Y * Y));
+			X *= val;
+			Y *= val;
+		}
+
 		/// <summary>
 		/// Turns this <see cref="Vector2"/> to an angle in radians.
 		/// </summary>
@@ -707,14 +717,7 @@ namespace MoonWorks.Math.Float
 		/// <returns>Unit vector.</returns>
 		public static Vector2 Normalize(Vector2 value)
 		{
-			float lengthSquared = (value.X * value.X) + (value.Y * value.Y);
-
-			if (lengthSquared == 0)
-			{
-				return Zero;
-			}
-
-			float val = 1.0f / System.MathF.Sqrt(lengthSquared);
+			float val = 1.0f / (float) System.Math.Sqrt((value.X * value.X) + (value.Y * value.Y));
 			value.X *= val;
 			value.Y *= val;
 			return value;

src/Math/Float/Vector3.cs

@@ -302,6 +302,21 @@ namespace MoonWorks.Math.Float
 			return (X * X) + (Y * Y) + (Z * Z);
 		}
 
+		/// <summary>
+		/// Turns this <see cref="Vector3"/> to a unit vector with the same direction.
+		/// </summary>
+		public void Normalize()
+		{
+			float factor = 1.0f / (float) System.Math.Sqrt(
+				(X * X) +
+				(Y * Y) +
+				(Z * Z)
+			);
+			X *= factor;
+			Y *= factor;
+			Z *= factor;
+		}
+
 		/// <summary>
 		/// Returns a <see cref="String"/> representation of this <see cref="Vector3"/> in the format:
 		/// {X:[<see cref="X"/>] Y:[<see cref="Y"/>] Z:[<see cref="Z"/>]}
@@ -885,14 +900,11 @@ namespace MoonWorks.Math.Float
 		/// <returns>Unit vector.</returns>
 		public static Vector3 Normalize(Vector3 value)
 		{
-			float lengthSquared = (value.X * value.X) + (value.Y * value.Y) + (value.Z * value.Z);
-
-			if (lengthSquared == 0f)
-			{
-				return Zero;
-			}
-
-			float factor = 1.0f / System.MathF.Sqrt(lengthSquared);
+			float factor = 1.0f / (float) System.Math.Sqrt(
+				(value.X * value.X) +
+				(value.Y * value.Y) +
+				(value.Z * value.Z)
+			);
 			return new Vector3(
 				value.X * factor,
 				value.Y * factor,

src/Math/Float/Vector4.cs

@@ -267,6 +267,23 @@ namespace MoonWorks.Math.Float
 			return (X * X) + (Y * Y) + (Z * Z) + (W * W);
 		}
 
+		/// <summary>
+		/// Turns this <see cref="Vector4"/> to a unit vector with the same direction.
+		/// </summary>
+		public void Normalize()
+		{
+			float factor = 1.0f / (float) System.Math.Sqrt(
+				(X * X) +
+				(Y * Y) +
+				(Z * Z) +
+				(W * W)
+			);
+			X *= factor;
+			Y *= factor;
+			Z *= factor;
+			W *= factor;
+		}
+
 		public override string ToString()
 		{
 			return (
@@ -836,15 +853,12 @@ namespace MoonWorks.Math.Float
 		/// <returns>Unit vector.</returns>
 		public static Vector4 Normalize(Vector4 vector)
 		{
-			var lengthSquared = (vector.X * vector.X) + (vector.Y * vector.Y) +
-			                        (vector.Z * vector.Z) + (vector.W * vector.W);
-
-			if (lengthSquared == 0)
-			{
-				return Zero;
-			}
-
-			float factor = 1.0f / System.MathF.Sqrt(lengthSquared);
+			float factor = 1.0f / (float) System.Math.Sqrt(
+				(vector.X * vector.X) +
+				(vector.Y * vector.Y) +
+				(vector.Z * vector.Z) +
+				(vector.W * vector.W)
+			);
 			return new Vector4(
 				vector.X * factor,
 				vector.Y * factor,
@@ -856,20 +870,16 @@ namespace MoonWorks.Math.Float
 		/// <summary>
 		/// Creates a new <see cref="Vector4"/> that contains a normalized values from another vector.
 		/// </summary>
-		/// <param name="vector">Source <see cref="Vector4"/>.</param>
+		/// <param name="value">Source <see cref="Vector4"/>.</param>
 		/// <param name="result">Unit vector as an output parameter.</param>
 		public static void Normalize(ref Vector4 vector, out Vector4 result)
 		{
-			float lengthSquared = (vector.X * vector.X) + (vector.Y * vector.Y) +
-			                      (vector.Z * vector.Z) + (vector.W * vector.W);
-
-			if (lengthSquared == 0)
-			{
-				result = Zero;
-				return;
-			}
-
-			float factor = 1.0f / System.MathF.Sqrt(lengthSquared);
+			float factor = 1.0f / (float) System.Math.Sqrt(
+				(vector.X * vector.X) +
+				(vector.Y * vector.Y) +
+				(vector.Z * vector.Z) +
+				(vector.W * vector.W)
+			);
 			result.X = vector.X * factor;
 			result.Y = vector.Y * factor;
 			result.Z = vector.Z * factor;

src/Math/MathHelper.cs

@@ -160,26 +160,6 @@ namespace MoonWorks.Math
 			return value;
 		}
 
-		/// <summary>
-		/// Restricts a value to be within a specified range.
-		/// </summary>
-		/// <param name="value">The value to clamp.</param>
-		/// <param name="min">
-		/// The minimum value. If <c>value</c> is less than <c>min</c>, <c>min</c>
-		/// will be returned.
-		/// </param>
-		/// <param name="max">
-		/// The maximum value. If <c>value</c> is greater than <c>max</c>, <c>max</c>
-		/// will be returned.
-		/// </param>
-		/// <returns>The clamped value.</returns>
-		public static int Clamp(int value, int min, int max)
-		{
-			value = (value > max) ? max : value;
-			value = (value < min) ? min : value;
-			return value;
-		}
-
 		/// <summary>
 		/// Calculates the absolute value of the difference of two values.
 		/// </summary>
@@ -302,12 +282,7 @@ namespace MoonWorks.Math
 
 		public static float Quantize(float value, float step)
 		{
-			return System.MathF.Round(value / step) * step;
-		}
-
-		public static Fixed.Fix64 Quantize(Fixed.Fix64 value, Fixed.Fix64 step)
-		{
-			return Fixed.Fix64.Round(value / step) * step;
+			return (float) System.Math.Floor(value / step) * step;
 		}
 
 		/// <summary>
@@ -420,6 +395,27 @@ namespace MoonWorks.Math
 
 		#region Internal Static Methods
 
+		// FIXME: This could be an extension! ClampIntEXT? -flibit
+		/// <summary>
+		/// Restricts a value to be within a specified range.
+		/// </summary>
+		/// <param name="value">The value to clamp.</param>
+		/// <param name="min">
+		/// The minimum value. If <c>value</c> is less than <c>min</c>, <c>min</c>
+		/// will be returned.
+		/// </param>
+		/// <param name="max">
+		/// The maximum value. If <c>value</c> is greater than <c>max</c>, <c>max</c>
+		/// will be returned.
+		/// </param>
+		/// <returns>The clamped value.</returns>
+		internal static int Clamp(int value, int min, int max)
+		{
+			value = (value > max) ? max : value;
+			value = (value < min) ? min : value;
+			return value;
+		}
+
 		internal static bool WithinEpsilon(float floatA, float floatB)
 		{
 			return System.Math.Abs(floatA - floatB) < MachineEpsilonFloat;

src/MoonWorksDllMap.cs

@@ -97,12 +97,16 @@ namespace MoonWorks
 
 			// Get the path to the assembly
 			Assembly assembly = Assembly.GetExecutingAssembly();
-			string assemblyPath = System.AppContext.BaseDirectory;
+			string assemblyPath = "";
+			if (assembly.Location != null)
+			{
+				assemblyPath = Path.GetDirectoryName(assembly.Location);
+			}
 
 			// Locate the config file
 			string xmlPath = Path.Combine(
 				assemblyPath,
-				"MoonWorks.dll.config"
+				assembly.GetName().Name + ".dll.config"
 			);
 			if (!File.Exists(xmlPath))
 			{

src/Video/StreamingSoundTheora.cs

@@ -0,0 +1,45 @@
+using System;
+using MoonWorks.Audio;
+
+namespace MoonWorks.Video
+{
+	public unsafe class StreamingSoundTheora : StreamingSound
+	{
+		private IntPtr VideoHandle;
+		protected override int BUFFER_SIZE => 8192;
+
+		internal StreamingSoundTheora(
+			AudioDevice device,
+			IntPtr videoHandle,
+			int channels,
+			uint sampleRate
+		) : base(
+			device,
+			3, /* float type */
+			32, /* size of float */
+			(ushort) (4 * channels),
+			(ushort) channels,
+			sampleRate
+		) {
+			VideoHandle = videoHandle;
+		}
+
+		protected override unsafe void FillBuffer(
+			void* buffer,
+			int bufferLengthInBytes,
+			out int filledLengthInBytes,
+			out bool reachedEnd
+		) {
+			var lengthInFloats = bufferLengthInBytes / sizeof(float);
+
+			int samples = Theorafile.tf_readaudio(
+				VideoHandle,
+				(IntPtr) buffer,
+				lengthInFloats
+			);
+
+			filledLengthInBytes = samples * sizeof(float);
+			reachedEnd = Theorafile.tf_eos(VideoHandle) == 1;
+		}
+	}
+}

src/Video/Video.cs

@@ -0,0 +1,120 @@
+/* Heavily based on https://github.com/FNA-XNA/FNA/blob/master/src/Media/Xiph/VideoPlayer.cs */
+using System;
+using System.Runtime.InteropServices;
+
+namespace MoonWorks.Video
+{
+	public enum VideoState
+	{
+		Playing,
+		Paused,
+		Stopped
+	}
+
+	public unsafe class Video : IDisposable
+	{
+		internal IntPtr Handle;
+		private IntPtr rwData;
+		private void* videoData;
+
+		public double FramesPerSecond => fps;
+		public int Width => yWidth;
+		public int Height => yHeight;
+		public int UVWidth { get; }
+		public int UVHeight { get; }
+
+		private double fps;
+		private int yWidth;
+		private int yHeight;
+
+		private bool disposed;
+
+		public Video(string filename)
+		{
+			if (!System.IO.File.Exists(filename))
+			{
+				throw new ArgumentException("Video file not found!");
+			}
+
+			var bytes = System.IO.File.ReadAllBytes(filename);
+			videoData = NativeMemory.Alloc((nuint) bytes.Length);
+			Marshal.Copy(bytes, 0, (IntPtr) videoData, bytes.Length);
+			rwData = SDL2.SDL.SDL_RWFromMem((IntPtr) videoData, bytes.Length);
+
+			if (Theorafile.tf_open_callbacks(rwData, out Handle, callbacks) < 0)
+			{
+				throw new ArgumentException("Invalid video file!");
+			}
+
+			Theorafile.th_pixel_fmt format;
+			Theorafile.tf_videoinfo(
+				Handle,
+				out yWidth,
+				out yHeight,
+				out fps,
+				out format
+			);
+
+			if (format == Theorafile.th_pixel_fmt.TH_PF_420)
+			{
+				UVWidth = Width / 2;
+				UVHeight = Height / 2;
+			}
+			else if (format == Theorafile.th_pixel_fmt.TH_PF_422)
+			{
+				UVWidth = Width / 2;
+				UVHeight = Height;
+			}
+			else if (format == Theorafile.th_pixel_fmt.TH_PF_444)
+			{
+				UVWidth = Width;
+				UVHeight = Height;
+			}
+			else
+			{
+				throw new NotSupportedException("Unrecognized YUV format!");
+			}
+		}
+
+		private static IntPtr Read(IntPtr ptr, IntPtr size, IntPtr nmemb, IntPtr datasource) => (IntPtr) SDL2.SDL.SDL_RWread(datasource, ptr, size, nmemb);
+		private static int Seek(IntPtr datasource, long offset, Theorafile.SeekWhence whence) => (int) SDL2.SDL.SDL_RWseek(datasource, offset, (int) whence);
+		private static int Close(IntPtr datasource) => (int) SDL2.SDL.SDL_RWclose(datasource);
+
+		private static Theorafile.tf_callbacks callbacks = new Theorafile.tf_callbacks
+		{
+			read_func = Read,
+			seek_func = Seek,
+			close_func = Close
+		};
+
+		protected virtual void Dispose(bool disposing)
+		{
+			if (!disposed)
+			{
+				if (disposing)
+				{
+					// dispose managed state (managed objects)
+				}
+
+				// free unmanaged resources (unmanaged objects)
+				Theorafile.tf_close(ref Handle);
+				NativeMemory.Free(videoData);
+
+				disposed = true;
+			}
+		}
+
+		~Video()
+		{
+		    // Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
+		    Dispose(disposing: false);
+		}
+
+		public void Dispose()
+		{
+			// Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
+			Dispose(disposing: true);
+			GC.SuppressFinalize(this);
+		}
+	}
+}

src/Video/VideoAV1.cs

@@ -1,89 +0,0 @@
-using System;
-using System.IO;
-using MoonWorks.Graphics;
-
-namespace MoonWorks.Video
-{
-	/// <summary>
-	/// This class takes in a filename for AV1 data in .obu (open bitstream unit) format
-	/// </summary>
-	public unsafe class VideoAV1 : GraphicsResource
-	{
-		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; }
-		public Dav1dfile.PixelLayout PixelLayout => pixelLayout;
-		public int UVWidth { get; }
-		public int UVHeight { get; }
-
-		private int width;
-		private int height;
-		private Dav1dfile.PixelLayout pixelLayout;
-
-		/// <summary>
-		/// Opens an AV1 file so it can be loaded by VideoPlayer. You must also provide a playback framerate.
-		/// </summary>
-		public VideoAV1(GraphicsDevice device, string filename, double framesPerSecond) : base(device)
-		{
-			if (!File.Exists(filename))
-			{
-				throw new ArgumentException("Video file not found!");
-			}
-
-			if (Dav1dfile.df_fopen(filename, out var handle) == 0)
-			{
-				throw new Exception("Failed to open video file!");
-			}
-
-			Dav1dfile.df_videoinfo(handle, out width, out height, out pixelLayout);
-			Dav1dfile.df_close(handle);
-
-			if (pixelLayout == Dav1dfile.PixelLayout.I420)
-			{
-				UVWidth = Width / 2;
-				UVHeight = Height / 2;
-			}
-			else if (pixelLayout == Dav1dfile.PixelLayout.I422)
-			{
-				UVWidth = Width / 2;
-				UVHeight = Height;
-			}
-			else if (pixelLayout == Dav1dfile.PixelLayout.I444)
-			{
-				UVWidth = width;
-				UVHeight = height;
-			}
-			else
-			{
-				throw new NotSupportedException("Unrecognized YUV format!");
-			}
-
-			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

@@ -1,82 +0,0 @@
-using System;
-using MoonWorks.Graphics;
-
-namespace MoonWorks.Video
-{
-	internal class VideoAV1Stream : GraphicsResource
-	{
-		public IntPtr Handle => handle;
-		IntPtr handle;
-
-		public bool Ended => Dav1dfile.df_eos(Handle) == 1;
-
-		public IntPtr yDataHandle;
-		public IntPtr uDataHandle;
-		public IntPtr vDataHandle;
-		public uint yDataLength;
-		public uint uvDataLength;
-		public uint yStride;
-		public uint uvStride;
-
-		public bool FrameDataUpdated { get; set; }
-
-		public VideoAV1Stream(GraphicsDevice device, VideoAV1 video) : base(device)
-		{
-			if (Dav1dfile.df_fopen(video.Filename, out handle) == 0)
-			{
-				throw new Exception("Failed to open video file!");
-			}
-
-			Reset();
-		}
-
-		public void Reset()
-		{
-			lock (this)
-			{
-				Dav1dfile.df_reset(Handle);
-				ReadNextFrame();
-			}
-		}
-
-		public void ReadNextFrame()
-		{
-			lock (this)
-			{
-				if (!Ended)
-				{
-					if (Dav1dfile.df_readvideo(
-						Handle,
-						1,
-						out var yDataHandle,
-						out var uDataHandle,
-						out var vDataHandle,
-						out var yDataLength,
-						out var uvDataLength,
-						out var yStride,
-						out var uvStride) == 1
-					) {
-						this.yDataHandle = yDataHandle;
-						this.uDataHandle = uDataHandle;
-						this.vDataHandle = vDataHandle;
-						this.yDataLength = yDataLength;
-						this.uvDataLength = uvDataLength;
-						this.yStride = yStride;
-						this.uvStride = uvStride;
-
-						FrameDataUpdated = true;
-					}
-				}
-			}
-		}
-
-		protected override void Dispose(bool disposing)
-		{
-			if (!IsDisposed)
-			{
-				Dav1dfile.df_close(Handle);
-			}
-			base.Dispose(disposing);
-		}
-	}
-}

src/Video/VideoPlayer.cs

@@ -1,26 +1,30 @@
-using System;
+using System;
 using System.Diagnostics;
-using System.Threading.Tasks;
+using System.Runtime.InteropServices;
+using MoonWorks.Audio;
 using MoonWorks.Graphics;
 
 namespace MoonWorks.Video
 {
-	/// <summary>
-	/// A structure for continuous decoding of AV1 videos and rendering them into a texture.
-	/// </summary>
-	public unsafe class VideoPlayer : GraphicsResource
+	public unsafe class VideoPlayer : IDisposable
 	{
 		public Texture RenderTexture { get; private set; } = null;
 		public VideoState State { get; private set; } = VideoState.Stopped;
 		public bool Loop { get; set; }
+		public float Volume {
+			get => volume;
+			set
+			{
+				volume = value;
+				if (audioStream != null)
+				{
+					audioStream.Volume = value;
+				}
+			}
+		}
 		public float PlaybackSpeed { get; set; } = 1;
 
-		private VideoAV1 Video = null;
-		private VideoAV1Stream CurrentStream = null;
-
-		private Task ReadNextFrameTask;
-		private Task ResetStreamATask;
-		private Task ResetStreamBTask;
+		private Video Video = null;
 
 		private GraphicsDevice GraphicsDevice;
 		private Texture yTexture = null;
@@ -28,26 +32,36 @@ namespace MoonWorks.Video
 		private Texture vTexture = null;
 		private Sampler LinearSampler;
 
+		private void* yuvData = null;
+		private int yuvDataLength = 0;
+
 		private int currentFrame;
 
+		private AudioDevice AudioDevice;
+		private StreamingSoundTheora audioStream = null;
+		private float volume = 1.0f;
+
 		private Stopwatch timer;
 		private double lastTimestamp;
 		private double timeElapsed;
 
-		public VideoPlayer(GraphicsDevice device) : base(device)
-		{
-			GraphicsDevice = device;
+		private bool disposed;
 
-			LinearSampler = new Sampler(device, SamplerCreateInfo.LinearClamp);
+		public VideoPlayer(GraphicsDevice graphicsDevice, AudioDevice audioDevice)
+		{
+			GraphicsDevice = graphicsDevice;
+			if (GraphicsDevice.VideoPipeline == null)
+			{
+				throw new InvalidOperationException("Missing video shaders!");
+			}
+
+			AudioDevice = audioDevice;
+			LinearSampler = new Sampler(graphicsDevice, SamplerCreateInfo.LinearClamp);
 
 			timer = new Stopwatch();
 		}
 
-		/// <summary>
-		/// Prepares a VideoAV1 for decoding and rendering.
-		/// </summary>
-		/// <param name="video"></param>
-		public void Load(VideoAV1 video)
+		public void Load(Video video)
 		{
 			if (Video != video)
 			{
@@ -97,19 +111,25 @@ namespace MoonWorks.Video
 					vTexture = CreateSubTexture(GraphicsDevice, video.UVWidth, video.UVHeight);
 				}
 
+				var newDataLength = (
+					(video.Width * video.Height) +
+					(video.UVWidth * video.UVHeight * 2)
+				);
+
+				if (newDataLength != yuvDataLength)
+				{
+					yuvData = NativeMemory.Realloc(yuvData, (nuint) newDataLength);
+					yuvDataLength = newDataLength;
+				}
+
 				Video = video;
 
-				InitializeDav1dStream();
+				InitializeTheoraStream();
 			}
 		}
 
-		/// <summary>
-		/// Starts playing back and decoding the loaded video.
-		/// </summary>
 		public void Play()
 		{
-			if (Video == null) { return; }
-
 			if (State == VideoState.Playing)
 			{
 				return;
@@ -117,16 +137,16 @@ namespace MoonWorks.Video
 
 			timer.Start();
 
+			if (audioStream != null)
+			{
+				audioStream.Play();
+			}
+
 			State = VideoState.Playing;
 		}
 
-		/// <summary>
-		/// Pauses playback and decoding of the currently playing video.
-		/// </summary>
 		public void Pause()
 		{
-			if (Video == null) { return; }
-
 			if (State != VideoState.Playing)
 			{
 				return;
@@ -134,16 +154,16 @@ namespace MoonWorks.Video
 
 			timer.Stop();
 
+			if (audioStream != null)
+			{
+				audioStream.Pause();
+			}
+
 			State = VideoState.Paused;
 		}
 
-		/// <summary>
-		/// Stops and resets decoding of the currently playing video.
-		/// </summary>
 		public void Stop()
 		{
-			if (Video == null) { return; }
-
 			if (State == VideoState.Stopped)
 			{
 				return;
@@ -152,28 +172,20 @@ namespace MoonWorks.Video
 			timer.Stop();
 			timer.Reset();
 
+			Theorafile.tf_reset(Video.Handle);
 			lastTimestamp = 0;
 			timeElapsed = 0;
 
-			InitializeDav1dStream();
+			if (audioStream != null)
+			{
+				audioStream.StopImmediate();
+				audioStream.Dispose();
+				audioStream = null;
+			}
 
 			State = VideoState.Stopped;
 		}
 
-		/// <summary>
-		/// Unloads the currently playing video.
-		/// </summary>
-		public void Unload()
-		{
-			Stop();
-			ResetStreamATask?.Wait();
-			ResetStreamBTask?.Wait();
-			Video = null;
-		}
-
-		/// <summary>
-		/// Renders the video data into RenderTexture.
-		/// </summary>
 		public void Render()
 		{
 			if (Video == null || State == VideoState.Stopped)
@@ -187,39 +199,37 @@ namespace MoonWorks.Video
 			int thisFrame = ((int) (timeElapsed / (1000.0 / Video.FramesPerSecond)));
 			if (thisFrame > currentFrame)
 			{
-				if (CurrentStream.FrameDataUpdated)
-				{
+				if (Theorafile.tf_readvideo(
+					Video.Handle,
+					(IntPtr) yuvData,
+					thisFrame - currentFrame
+				) == 1 || currentFrame == -1) {
 					UpdateRenderTexture();
-					CurrentStream.FrameDataUpdated = false;
 				}
 
 				currentFrame = thisFrame;
-				ReadNextFrameTask = Task.Run(CurrentStream.ReadNextFrame);
-				ReadNextFrameTask.ContinueWith(HandleTaskException, TaskContinuationOptions.OnlyOnFaulted);
 			}
 
-			if (CurrentStream.Ended)
+			bool ended = Theorafile.tf_eos(Video.Handle) == 1;
+			if (ended)
 			{
 				timer.Stop();
 				timer.Reset();
 
-				var task = Task.Run(CurrentStream.Reset);
-				task.ContinueWith(HandleTaskException, TaskContinuationOptions.OnlyOnFaulted);
+				if (audioStream != null)
+				{
+					audioStream.Stop();
+					audioStream.Dispose();
+					audioStream = null;
+				}
 
-				if (CurrentStream == Video.StreamA)
-				{
-					ResetStreamATask = task;
-				}
-				else
-				{
-					ResetStreamBTask = task;
-				}
+				Theorafile.tf_reset(Video.Handle);
 
 				if (Loop)
 				{
-					// Start over on the next stream!
-					CurrentStream = (CurrentStream == Video.StreamA) ? Video.StreamB : Video.StreamA;
-					currentFrame = -1;
+					// Start over!
+					InitializeTheoraStream();
+
 					timer.Start();
 				}
 				else
@@ -230,8 +240,6 @@ namespace MoonWorks.Video
 		}
 
 		private void UpdateRenderTexture()
-		{
-			lock (CurrentStream)
 		{
 			var commandBuffer = GraphicsDevice.AcquireCommandBuffer();
 
@@ -239,13 +247,8 @@ namespace MoonWorks.Video
 				yTexture,
 				uTexture,
 				vTexture,
-					CurrentStream.yDataHandle,
-					CurrentStream.uDataHandle,
-					CurrentStream.vDataHandle,
-					CurrentStream.yDataLength,
-					CurrentStream.uvDataLength,
-					CurrentStream.yStride,
-					CurrentStream.uvStride
+				(IntPtr) yuvData,
+				(uint) yuvDataLength
 			);
 
 			commandBuffer.BeginRenderPass(
@@ -265,7 +268,6 @@ namespace MoonWorks.Video
 
 			GraphicsDevice.Submit(commandBuffer);
 		}
-		}
 
 		private static Texture CreateRenderTexture(GraphicsDevice graphicsDevice, int width, int height)
 		{
@@ -289,42 +291,53 @@ namespace MoonWorks.Video
 			);
 		}
 
-		private void InitializeDav1dStream()
+		private void InitializeTheoraStream()
 		{
-			ReadNextFrameTask?.Wait();
+			// Grab the first video frame ASAP.
+			while (Theorafile.tf_readvideo(Video.Handle, (IntPtr) yuvData, 1) == 0);
 
-			ResetStreamATask = Task.Run(Video.StreamA.Reset);
-			ResetStreamATask.ContinueWith(HandleTaskException, TaskContinuationOptions.OnlyOnFaulted);
-			ResetStreamBTask = Task.Run(Video.StreamB.Reset);
-			ResetStreamBTask.ContinueWith(HandleTaskException, TaskContinuationOptions.OnlyOnFaulted);
+			// Grab the first bit of audio. We're trying to start the decoding ASAP.
+			if (AudioDevice != null && Theorafile.tf_hasaudio(Video.Handle) == 1)
+			{
+				int channels, sampleRate;
+				Theorafile.tf_audioinfo(Video.Handle, out channels, out sampleRate);
+				audioStream = new StreamingSoundTheora(AudioDevice, Video.Handle, channels, (uint) sampleRate);
+			}
 
-			CurrentStream = Video.StreamA;
 			currentFrame = -1;
 		}
 
-		private static void HandleTaskException(Task task)
+		protected virtual void Dispose(bool disposing)
 		{
-			if (task.Exception.InnerException is not TaskCanceledException)
-			{
-				throw task.Exception;
-			}
-		}
-
-		protected override void Dispose(bool disposing)
-		{
-			if (!IsDisposed)
+			if (!disposed)
 			{
 				if (disposing)
 				{
-					Unload();
+					// dispose managed state (managed objects)
+					RenderTexture.Dispose();
+					yTexture.Dispose();
+					uTexture.Dispose();
+					vTexture.Dispose();
+				}
 
-					RenderTexture?.Dispose();
-					yTexture?.Dispose();
-					uTexture?.Dispose();
-					vTexture?.Dispose();
+				// free unmanaged resources (unmanaged objects) and override finalizer
+				NativeMemory.Free(yuvData);
+
+				disposed = true;
 			}
 		}
-			base.Dispose(disposing);
+
+		~VideoPlayer()
+		{
+		    // Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
+		    Dispose(disposing: false);
+		}
+
+		public void Dispose()
+		{
+			// Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
+			Dispose(disposing: true);
+			GC.SuppressFinalize(this);
 		}
 	}
 }

src/Video/VideoState.cs

@@ -1,9 +0,0 @@
-namespace MoonWorks.Video
-{
-	public enum VideoState
-	{
-		Playing,
-		Paused,
-		Stopped
-	}
-}

src/Window.cs

@@ -5,18 +5,13 @@ using SDL2;
 
 namespace MoonWorks
 {
-	/// <summary>
-	/// Represents a window in the client operating system. <br/>
-	/// Every Game has a MainWindow automatically. <br/>
-	/// You can create additional Windows if you desire. They must be Claimed by the GraphicsDevice to be rendered to.
-	/// </summary>
 	public class Window : IDisposable
 	{
 		internal IntPtr Handle { get; }
 		public ScreenMode ScreenMode { get; private set; }
 		public uint Width { get; private set; }
 		public uint Height { get; private set; }
-		internal Texture SwapchainTexture { get; set; }
+		internal Texture SwapchainTexture { get; set; } = null;
 
 		public bool Claimed { get; internal set; }
 		public MoonWorks.Graphics.TextureFormat SwapchainFormat { get; internal set; }
@@ -50,28 +45,21 @@ namespace MoonWorks
 
 			ScreenMode = windowCreateInfo.ScreenMode;
 
-			SDL.SDL_GetDesktopDisplayMode(0, out var displayMode);
-
 			Handle = SDL.SDL_CreateWindow(
 				windowCreateInfo.WindowTitle,
-				SDL.SDL_WINDOWPOS_CENTERED,
-				SDL.SDL_WINDOWPOS_CENTERED,
-				windowCreateInfo.ScreenMode == ScreenMode.Windowed ? (int) windowCreateInfo.WindowWidth : displayMode.w,
-				windowCreateInfo.ScreenMode == ScreenMode.Windowed ? (int) windowCreateInfo.WindowHeight : displayMode.h,
+				SDL.SDL_WINDOWPOS_UNDEFINED,
+				SDL.SDL_WINDOWPOS_UNDEFINED,
+				(int) windowCreateInfo.WindowWidth,
+				(int) windowCreateInfo.WindowHeight,
 				flags
 			);
 
-			/* Requested size might be different in fullscreen, so let's just get the area */
-			SDL.SDL_GetWindowSize(Handle, out var width, out var height);
-			Width = (uint) width;
-			Height = (uint) height;
+			Width = windowCreateInfo.WindowWidth;
+			Height = windowCreateInfo.WindowHeight;
 
 			idLookup.Add(SDL.SDL_GetWindowID(Handle), this);
 		}
 
-		/// <summary>
-		/// Changes the ScreenMode of this window.
-		/// </summary>
 		public void SetScreenMode(ScreenMode screenMode)
 		{
 			SDL.SDL_WindowFlags windowFlag = 0;
@@ -85,18 +73,13 @@ namespace MoonWorks
 				windowFlag = SDL.SDL_WindowFlags.SDL_WINDOW_FULLSCREEN_DESKTOP;
 			}
 
-			SDL.SDL_SetWindowFullscreen(Handle, (uint) windowFlag);
-
-			if (screenMode == ScreenMode.Windowed)
-			{
-				SDL.SDL_SetWindowPosition(Handle, SDL.SDL_WINDOWPOS_CENTERED, SDL.SDL_WINDOWPOS_CENTERED);
-			}
-
 			ScreenMode = screenMode;
+
+			SDL.SDL_SetWindowFullscreen(Handle, (uint) windowFlag);
 		}
 
 		/// <summary>
-		/// Resizes the window. <br/>
+		/// Resizes the window.
 		/// Note that you are responsible for recreating any graphics resources that need to change as a result of the size change.
 		/// </summary>
 		/// <param name="width"></param>
@@ -106,11 +89,6 @@ namespace MoonWorks
 			SDL.SDL_SetWindowSize(Handle, (int) width, (int) height);
 			Width = width;
 			Height = height;
-
-			if (ScreenMode == ScreenMode.Windowed)
-			{
-				SDL.SDL_SetWindowPosition(Handle, SDL.SDL_WINDOWPOS_CENTERED, SDL.SDL_WINDOWPOS_CENTERED);
-			}
 		}
 
 		internal static Window Lookup(uint windowID)
@@ -134,9 +112,6 @@ namespace MoonWorks
 			}
 		}
 
-		/// <summary>
-		/// You can specify a method to run when the window size changes.
-		/// </summary>
 		public void RegisterSizeChangeCallback(System.Action<uint, uint> sizeChangeCallback)
 		{
 			SizeChangeCallback = sizeChangeCallback;

src/WindowCreateInfo.cs

@@ -1,37 +1,13 @@
 namespace MoonWorks
 {
-	/// <summary>
-	/// All the information required for window creation.
-	/// </summary>
 	public struct WindowCreateInfo
 	{
-		/// <summary>
-		/// The name of the window that will be displayed in the operating system.
-		/// </summary>
 		public string WindowTitle;
-		/// <summary>
-		/// The width of the window.
-		/// </summary>
 		public uint WindowWidth;
-		/// <summary>
-		/// The height of the window.
-		/// </summary>
 		public uint WindowHeight;
-		/// <summary>
-		/// Specifies if the window will be created in windowed mode or a fullscreen mode.
-		/// </summary>
 		public ScreenMode ScreenMode;
-		/// <summary>
-		/// Specifies the presentation mode for the window. Roughly equivalent to V-Sync.
-		/// </summary>
 		public PresentMode PresentMode;
-		/// <summary>
-		/// Whether the window can be resized using the operating system's window dragging feature.
-		/// </summary>
 		public bool SystemResizable;
-		/// <summary>
-		/// Specifies if the window will open at the maximum desktop resolution.
-		/// </summary>
 		public bool StartMaximized;
 
 		public WindowCreateInfo(