Move solution and projects to src

author: TSR Berry <20988865+TSRBerry@users.noreply.github.com> 2023-04-08 01:22:00 +0200
committer: Mary <thog@protonmail.com> 2023-04-27 23:51:14 +0200
commit: cee712105850ac3385cd0091a923438167433f9f (patch)
tree: 4a5274b21d8b7f938c0d0ce18736d3f2993b11b1 /src/Ryujinx.Graphics.Texture/Astc/AstcDecoder.cs
parent: cd124bda587ef09668a971fa1cac1c3f0cfc9f21 (diff)
1 files changed, 1621 insertions, 0 deletions
diff --git a/src/Ryujinx.Graphics.Texture/Astc/AstcDecoder.cs b/src/Ryujinx.Graphics.Texture/Astc/AstcDecoder.cs
new file mode 100644
index 00000000..08738583
--- /dev/null
+++ b/src/Ryujinx.Graphics.Texture/Astc/AstcDecoder.cs
@@ -0,0 +1,1621 @@
+using Ryujinx.Common.Utilities;
+using System;
+using System.Diagnostics;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Graphics.Texture.Astc
+{
+    // https://github.com/GammaUNC/FasTC/blob/master/ASTCEncoder/src/Decompressor.cpp
+    public class AstcDecoder
+    {
+        private ReadOnlyMemory<byte> InputBuffer { get; }
+        private Memory<byte> OutputBuffer { get; }
+
+        private int BlockSizeX { get; }
+        private int BlockSizeY { get; }
+
+        private AstcLevel[] Levels { get; }
+
+        private bool Success { get; set; }
+
+        public int TotalBlockCount { get; }
+
+        public AstcDecoder(
+            ReadOnlyMemory<byte> inputBuffer,
+            Memory<byte> outputBuffer,
+            int blockWidth,
+            int blockHeight,
+            int width,
+            int height,
+            int depth,
+            int levels,
+            int layers)
+        {
+            if ((uint)blockWidth > 12)
+            {
+                throw new ArgumentOutOfRangeException(nameof(blockWidth));
+            }
+
+            if ((uint)blockHeight > 12)
+            {
+                throw new ArgumentOutOfRangeException(nameof(blockHeight));
+            }
+
+            InputBuffer = inputBuffer;
+            OutputBuffer = outputBuffer;
+
+            BlockSizeX = blockWidth;
+            BlockSizeY = blockHeight;
+
+            Levels = new AstcLevel[levels * layers];
+
+            Success = true;
+
+            TotalBlockCount = 0;
+
+            int currentInputBlock = 0;
+            int currentOutputOffset = 0;
+
+            for (int i = 0; i < levels; i++)
+            {
+                for (int j = 0; j < layers; j++)
+                {
+                    ref AstcLevel level = ref Levels[i * layers + j];
+
+                    level.ImageSizeX = Math.Max(1, width >> i);
+                    level.ImageSizeY = Math.Max(1, height >> i);
+                    level.ImageSizeZ = Math.Max(1, depth >> i);
+
+                    level.BlockCountX = (level.ImageSizeX + blockWidth - 1) / blockWidth;
+                    level.BlockCountY = (level.ImageSizeY + blockHeight - 1) / blockHeight;
+
+                    level.StartBlock = currentInputBlock;
+                    level.OutputByteOffset = currentOutputOffset;
+
+                    currentInputBlock += level.TotalBlockCount;
+                    currentOutputOffset += level.PixelCount * 4;
+                }
+            }
+
+            TotalBlockCount = currentInputBlock;
+        }
+
+        private struct AstcLevel
+        {
+            public int ImageSizeX { get; set; }
+            public int ImageSizeY { get; set; }
+            public int ImageSizeZ { get; set; }
+
+            public int BlockCountX { get; set; }
+            public int BlockCountY { get; set; }
+
+            public int StartBlock { get; set; }
+            public int OutputByteOffset { get; set; }
+
+            public int TotalBlockCount => BlockCountX * BlockCountY * ImageSizeZ;
+            public int PixelCount => ImageSizeX * ImageSizeY * ImageSizeZ;
+        }
+
+        public static int QueryDecompressedSize(int sizeX, int sizeY, int sizeZ, int levelCount, int layerCount)
+        {
+            int size = 0;
+
+            for (int i = 0; i < levelCount; i++)
+            {
+                int levelSizeX = Math.Max(1, sizeX >> i);
+                int levelSizeY = Math.Max(1, sizeY >> i);
+                int levelSizeZ = Math.Max(1, sizeZ >> i);
+
+                size += levelSizeX * levelSizeY * levelSizeZ * layerCount;
+            }
+
+            return size * 4;
+        }
+
+        public void ProcessBlock(int index)
+        {
+            Buffer16 inputBlock = MemoryMarshal.Cast<byte, Buffer16>(InputBuffer.Span)[index];
+
+            Span<int> decompressedData = stackalloc int[144];
+
+            try
+            {
+                DecompressBlock(inputBlock, decompressedData, BlockSizeX, BlockSizeY);
+            }
+            catch (Exception)
+            {
+                Success = false;
+            }
+
+            Span<byte> decompressedBytes = MemoryMarshal.Cast<int, byte>(decompressedData);
+
+            AstcLevel levelInfo = GetLevelInfo(index);
+
+            WriteDecompressedBlock(decompressedBytes, OutputBuffer.Span.Slice(levelInfo.OutputByteOffset),
+                index - levelInfo.StartBlock, levelInfo);
+        }
+
+        private AstcLevel GetLevelInfo(int blockIndex)
+        {
+            foreach (AstcLevel levelInfo in Levels)
+            {
+                if (blockIndex < levelInfo.StartBlock + levelInfo.TotalBlockCount)
+                {
+                    return levelInfo;
+                }
+            }
+
+            throw new AstcDecoderException("Invalid block index.");
+        }
+
+        private void WriteDecompressedBlock(ReadOnlySpan<byte> block, Span<byte> outputBuffer, int blockIndex, AstcLevel level)
+        {
+            int stride = level.ImageSizeX * 4;
+
+            int blockCordX = blockIndex % level.BlockCountX;
+            int blockCordY = blockIndex / level.BlockCountX;
+
+            int pixelCordX = blockCordX * BlockSizeX;
+            int pixelCordY = blockCordY * BlockSizeY;
+
+            int outputPixelsX = Math.Min(pixelCordX + BlockSizeX, level.ImageSizeX) - pixelCordX;
+            int outputPixelsY = Math.Min(pixelCordY + BlockSizeY, level.ImageSizeY * level.ImageSizeZ) - pixelCordY;
+
+            int outputStart = pixelCordX * 4 + pixelCordY * stride;
+            int outputOffset = outputStart;
+
+            int inputOffset = 0;
+
+            for (int i = 0; i < outputPixelsY; i++)
+            {
+                ReadOnlySpan<byte> blockRow = block.Slice(inputOffset, outputPixelsX * 4);
+                Span<byte> outputRow = outputBuffer.Slice(outputOffset);
+                blockRow.CopyTo(outputRow);
+
+                inputOffset += BlockSizeX * 4;
+                outputOffset += stride;
+            }
+        }
+
+        struct TexelWeightParams
+        {
+            public int Width;
+            public int Height;
+            public int MaxWeight;
+            public bool DualPlane;
+            public bool Error;
+            public bool VoidExtentLdr;
+            public bool VoidExtentHdr;
+
+            public int GetPackedBitSize()
+            {
+                // How many indices do we have?
+                int indices = Height * Width;
+
+                if (DualPlane)
+                {
+                    indices *= 2;
+                }
+
+                IntegerEncoded intEncoded = IntegerEncoded.CreateEncoding(MaxWeight);
+
+                return intEncoded.GetBitLength(indices);
+            }
+
+            public int GetNumWeightValues()
+            {
+                int ret = Width * Height;
+
+                if (DualPlane)
+                {
+                    ret *= 2;
+                }
+
+                return ret;
+            }
+        }
+
+        public static bool TryDecodeToRgba8(
+            ReadOnlyMemory<byte> data,
+            int blockWidth,
+            int blockHeight,
+            int width,
+            int height,
+            int depth,
+            int levels,
+            int layers,
+            out Span<byte> decoded)
+        {
+            byte[] output = new byte[QueryDecompressedSize(width, height, depth, levels, layers)];
+
+            AstcDecoder decoder = new AstcDecoder(data, output, blockWidth, blockHeight, width, height, depth, levels, layers);
+
+            for (int i = 0; i < decoder.TotalBlockCount; i++)
+            {
+                decoder.ProcessBlock(i);
+            }
+
+            decoded = output;
+
+            return decoder.Success;
+        }
+
+        public static bool TryDecodeToRgba8(
+            ReadOnlyMemory<byte> data,
+            Memory<byte> outputBuffer,
+            int blockWidth,
+            int blockHeight,
+            int width,
+            int height,
+            int depth,
+            int levels,
+            int layers)
+        {
+            AstcDecoder decoder = new AstcDecoder(data, outputBuffer, blockWidth, blockHeight, width, height, depth, levels, layers);
+
+            for (int i = 0; i < decoder.TotalBlockCount; i++)
+            {
+                decoder.ProcessBlock(i);
+            }
+
+            return decoder.Success;
+        }
+
+        public static bool TryDecodeToRgba8P(
+            ReadOnlyMemory<byte> data,
+            Memory<byte> outputBuffer,
+            int blockWidth,
+            int blockHeight,
+            int width,
+            int height,
+            int depth,
+            int levels,
+            int layers)
+        {
+            AstcDecoder decoder = new AstcDecoder(data, outputBuffer, blockWidth, blockHeight, width, height, depth, levels, layers);
+
+            // Lazy parallelism
+            Enumerable.Range(0, decoder.TotalBlockCount).AsParallel().ForAll(x => decoder.ProcessBlock(x));
+
+            return decoder.Success;
+        }
+
+        public static bool TryDecodeToRgba8P(
+            ReadOnlyMemory<byte> data,
+            int blockWidth,
+            int blockHeight,
+            int width,
+            int height,
+            int depth,
+            int levels,
+            int layers,
+            out byte[] decoded)
+        {
+            byte[] output = new byte[QueryDecompressedSize(width, height, depth, levels, layers)];
+
+            AstcDecoder decoder = new AstcDecoder(data, output, blockWidth, blockHeight, width, height, depth, levels, layers);
+
+            Enumerable.Range(0, decoder.TotalBlockCount).AsParallel().ForAll(x => decoder.ProcessBlock(x));
+
+            decoded = output;
+
+            return decoder.Success;
+        }
+
+        public static bool DecompressBlock(
+            Buffer16 inputBlock,
+            Span<int> outputBuffer,
+            int blockWidth,
+            int blockHeight)
+        {
+            BitStream128 bitStream = new BitStream128(inputBlock);
+
+            DecodeBlockInfo(ref bitStream, out TexelWeightParams texelParams);
+
+            if (texelParams.Error)
+            {
+                throw new AstcDecoderException("Invalid block mode");
+            }
+
+            if (texelParams.VoidExtentLdr)
+            {
+                FillVoidExtentLdr(ref bitStream, outputBuffer, blockWidth, blockHeight);
+
+                return true;
+            }
+
+            if (texelParams.VoidExtentHdr)
+            {
+                throw new AstcDecoderException("HDR void extent blocks are not supported.");
+            }
+
+            if (texelParams.Width > blockWidth)
+            {
+                throw new AstcDecoderException("Texel weight grid width should be smaller than block width.");
+            }
+
+            if (texelParams.Height > blockHeight)
+            {
+                throw new AstcDecoderException("Texel weight grid height should be smaller than block height.");
+            }
+
+            // Read num partitions
+            int numberPartitions = bitStream.ReadBits(2) + 1;
+            Debug.Assert(numberPartitions <= 4);
+
+            if (numberPartitions == 4 && texelParams.DualPlane)
+            {
+                throw new AstcDecoderException("Dual plane mode is incompatible with four partition blocks.");
+            }
+
+            // Based on the number of partitions, read the color endpoint mode for
+            // each partition.
+
+            // Determine partitions, partition index, and color endpoint modes
+            int planeIndices;
+            int partitionIndex;
+
+            Span<uint> colorEndpointMode = stackalloc uint[4];
+
+            BitStream128 colorEndpointStream = new BitStream128();
+
+            // Read extra config data...
+            uint baseColorEndpointMode = 0;
+
+            if (numberPartitions == 1)
+            {
+                colorEndpointMode[0] = (uint)bitStream.ReadBits(4);
+                partitionIndex = 0;
+            }
+            else
+            {
+                partitionIndex = bitStream.ReadBits(10);
+                baseColorEndpointMode = (uint)bitStream.ReadBits(6);
+            }
+
+            uint baseMode = (baseColorEndpointMode & 3);
+
+            // Remaining bits are color endpoint data...
+            int numberWeightBits = texelParams.GetPackedBitSize();
+            int remainingBits = bitStream.BitsLeft - numberWeightBits;
+
+            // Consider extra bits prior to texel data...
+            uint extraColorEndpointModeBits = 0;
+
+            if (baseMode != 0)
+            {
+                switch (numberPartitions)
+                {
+                    case 2: extraColorEndpointModeBits += 2; break;
+                    case 3: extraColorEndpointModeBits += 5; break;
+                    case 4: extraColorEndpointModeBits += 8; break;
+                    default: Debug.Assert(false); break;
+                }
+            }
+
+            remainingBits -= (int)extraColorEndpointModeBits;
+
+            // Do we have a dual plane situation?
+            int planeSelectorBits = 0;
+
+            if (texelParams.DualPlane)
+            {
+                planeSelectorBits = 2;
+            }
+
+            remainingBits -= planeSelectorBits;
+
+            // Read color data...
+            int colorDataBits = remainingBits;
+
+            while (remainingBits > 0)
+            {
+                int numberBits = Math.Min(remainingBits, 8);
+                int bits = bitStream.ReadBits(numberBits);
+                colorEndpointStream.WriteBits(bits, numberBits);
+                remainingBits -= 8;
+            }
+
+            // Read the plane selection bits
+            planeIndices = bitStream.ReadBits(planeSelectorBits);
+
+            // Read the rest of the CEM
+            if (baseMode != 0)
+            {
+                uint extraColorEndpointMode = (uint)bitStream.ReadBits((int)extraColorEndpointModeBits);
+                uint tempColorEndpointMode = (extraColorEndpointMode << 6) | baseColorEndpointMode;
+                tempColorEndpointMode >>= 2;
+
+                Span<bool> c = stackalloc bool[4];
+
+                for (int i = 0; i < numberPartitions; i++)
+                {
+                    c[i] = (tempColorEndpointMode & 1) != 0;
+                    tempColorEndpointMode >>= 1;
+                }
+
+                Span<byte> m = stackalloc byte[4];
+
+                for (int i = 0; i < numberPartitions; i++)
+                {
+                    m[i] = (byte)(tempColorEndpointMode & 3);
+                    tempColorEndpointMode >>= 2;
+                    Debug.Assert(m[i] <= 3);
+                }
+
+                for (int i = 0; i < numberPartitions; i++)
+                {
+                    colorEndpointMode[i] = baseMode;
+                    if (!(c[i])) colorEndpointMode[i] -= 1;
+                    colorEndpointMode[i] <<= 2;
+                    colorEndpointMode[i] |= m[i];
+                }
+            }
+            else if (numberPartitions > 1)
+            {
+                uint tempColorEndpointMode = baseColorEndpointMode >> 2;
+
+                for (int i = 0; i < numberPartitions; i++)
+                {
+                    colorEndpointMode[i] = tempColorEndpointMode;
+                }
+            }
+
+            // Make sure everything up till here is sane.
+            for (int i = 0; i < numberPartitions; i++)
+            {
+                Debug.Assert(colorEndpointMode[i] < 16);
+            }
+            Debug.Assert(bitStream.BitsLeft == texelParams.GetPackedBitSize());
+
+            // Decode both color data and texel weight data
+            Span<int> colorValues = stackalloc int[32]; // Four values * two endpoints * four maximum partitions
+            DecodeColorValues(colorValues, ref colorEndpointStream, colorEndpointMode, numberPartitions, colorDataBits);
+
+            EndPointSet endPoints;
+            unsafe { _ = &endPoints; } // Skip struct initialization
+
+            int colorValuesPosition = 0;
+
+            for (int i = 0; i < numberPartitions; i++)
+            {
+                ComputeEndpoints(endPoints.Get(i), colorValues, colorEndpointMode[i], ref colorValuesPosition);
+            }
+
+            // Read the texel weight data.
+            Buffer16 texelWeightData = inputBlock;
+
+            // Reverse everything
+            for (int i = 0; i < 8; i++)
+            {
+                byte a = ReverseByte(texelWeightData[i]);
+                byte b = ReverseByte(texelWeightData[15 - i]);
+
+                texelWeightData[i] = b;
+                texelWeightData[15 - i] = a;
+            }
+
+            // Make sure that higher non-texel bits are set to zero
+            int clearByteStart = (texelParams.GetPackedBitSize() >> 3) + 1;
+            texelWeightData[clearByteStart - 1] &= (byte)((1 << (texelParams.GetPackedBitSize() % 8)) - 1);
+
+            int cLen = 16 - clearByteStart;
+            for (int i = clearByteStart; i < clearByteStart + cLen; i++) texelWeightData[i] = 0;
+
+            IntegerSequence texelWeightValues;
+            unsafe { _ = &texelWeightValues; } // Skip struct initialization
+            texelWeightValues.Reset();
+
+            BitStream128 weightBitStream = new BitStream128(texelWeightData);
+
+            IntegerEncoded.DecodeIntegerSequence(ref texelWeightValues, ref weightBitStream, texelParams.MaxWeight, texelParams.GetNumWeightValues());
+
+            // Blocks can be at most 12x12, so we can have as many as 144 weights
+            Weights weights;
+            unsafe { _ = &weights; } // Skip struct initialization
+
+            UnquantizeTexelWeights(ref weights, ref texelWeightValues, ref texelParams, blockWidth, blockHeight);
+
+            ushort[] table = Bits.Replicate8_16Table;
+
+            // Now that we have endpoints and weights, we can interpolate and generate
+            // the proper decoding...
+            for (int j = 0; j < blockHeight; j++)
+            {
+                for (int i = 0; i < blockWidth; i++)
+                {
+                    int partition = Select2dPartition(partitionIndex, i, j, numberPartitions, ((blockHeight * blockWidth) < 32));
+                    Debug.Assert(partition < numberPartitions);
+
+                    AstcPixel pixel = new AstcPixel();
+                    for (int component = 0; component < 4; component++)
+                    {
+                        int component0 = endPoints.Get(partition)[0].GetComponent(component);
+                        component0 = table[component0];
+                        int component1 = endPoints.Get(partition)[1].GetComponent(component);
+                        component1 = table[component1];
+
+                        int plane = 0;
+
+                        if (texelParams.DualPlane && (((planeIndices + 1) & 3) == component))
+                        {
+                            plane = 1;
+                        }
+
+                        int weight = weights.Get(plane)[j * blockWidth + i];
+                        int finalComponent = (component0 * (64 - weight) + component1 * weight + 32) / 64;
+
+                        if (finalComponent == 65535)
+                        {
+                            pixel.SetComponent(component, 255);
+                        }
+                        else
+                        {
+                            double finalComponentFloat = finalComponent;
+                            pixel.SetComponent(component, (int)(255.0 * (finalComponentFloat / 65536.0) + 0.5));
+                        }
+                    }
+
+                    outputBuffer[j * blockWidth + i] = pixel.Pack();
+                }
+            }
+
+            return true;
+        }
+
+        // Blocks can be at most 12x12, so we can have as many as 144 weights
+        [StructLayout(LayoutKind.Sequential, Size = 144 * sizeof(int) * Count)]
+        private struct Weights
+        {
+            private int _start;
+
+            public const int Count = 2;
+
+            public Span<int> this[int index]
+            {
+                get
+                {
+                    if ((uint)index >= Count)
+                    {
+                        throw new ArgumentOutOfRangeException();
+                    }
+
+                    ref int start = ref Unsafe.Add(ref _start, index * 144);
+
+                    return MemoryMarshal.CreateSpan(ref start, 144);
+                }
+            }
+
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            public Span<int> Get(int index)
+            {
+                ref int start = ref Unsafe.Add(ref _start, index * 144);
+
+                return MemoryMarshal.CreateSpan(ref start, 144);
+            }
+        }
+
+        private static int Select2dPartition(int seed, int x, int y, int partitionCount, bool isSmallBlock)
+        {
+            return SelectPartition(seed, x, y, 0, partitionCount, isSmallBlock);
+        }
+
+        private static int SelectPartition(int seed, int x, int y, int z, int partitionCount, bool isSmallBlock)
+        {
+            if (partitionCount == 1)
+            {
+                return 0;
+            }
+
+            if (isSmallBlock)
+            {
+                x <<= 1;
+                y <<= 1;
+                z <<= 1;
+            }
+
+            seed += (partitionCount - 1) * 1024;
+
+            int rightNum = Hash52((uint)seed);
+            byte seed01 = (byte)(rightNum & 0xF);
+            byte seed02 = (byte)((rightNum >> 4) & 0xF);
+            byte seed03 = (byte)((rightNum >> 8) & 0xF);
+            byte seed04 = (byte)((rightNum >> 12) & 0xF);
+            byte seed05 = (byte)((rightNum >> 16) & 0xF);
+            byte seed06 = (byte)((rightNum >> 20) & 0xF);
+            byte seed07 = (byte)((rightNum >> 24) & 0xF);
+            byte seed08 = (byte)((rightNum >> 28) & 0xF);
+            byte seed09 = (byte)((rightNum >> 18) & 0xF);
+            byte seed10 = (byte)((rightNum >> 22) & 0xF);
+            byte seed11 = (byte)((rightNum >> 26) & 0xF);
+            byte seed12 = (byte)(((rightNum >> 30) | (rightNum << 2)) & 0xF);
+
+            seed01 *= seed01; seed02 *= seed02;
+            seed03 *= seed03; seed04 *= seed04;
+            seed05 *= seed05; seed06 *= seed06;
+            seed07 *= seed07; seed08 *= seed08;
+            seed09 *= seed09; seed10 *= seed10;
+            seed11 *= seed11; seed12 *= seed12;
+
+            int seedHash1, seedHash2, seedHash3;
+
+            if ((seed & 1) != 0)
+            {
+                seedHash1 = (seed & 2) != 0 ? 4 : 5;
+                seedHash2 = (partitionCount == 3) ? 6 : 5;
+            }
+            else
+            {
+                seedHash1 = (partitionCount == 3) ? 6 : 5;
+                seedHash2 = (seed & 2) != 0 ? 4 : 5;
+            }
+
+            seedHash3 = (seed & 0x10) != 0 ? seedHash1 : seedHash2;
+
+            seed01 >>= seedHash1; seed02 >>= seedHash2; seed03 >>= seedHash1; seed04 >>= seedHash2;
+            seed05 >>= seedHash1; seed06 >>= seedHash2; seed07 >>= seedHash1; seed08 >>= seedHash2;
+            seed09 >>= seedHash3; seed10 >>= seedHash3; seed11 >>= seedHash3; seed12 >>= seedHash3;
+
+            int a = seed01 * x + seed02 * y + seed11 * z + (rightNum >> 14);
+            int b = seed03 * x + seed04 * y + seed12 * z + (rightNum >> 10);
+            int c = seed05 * x + seed06 * y + seed09 * z + (rightNum >> 6);
+            int d = seed07 * x + seed08 * y + seed10 * z + (rightNum >> 2);
+
+            a &= 0x3F; b &= 0x3F; c &= 0x3F; d &= 0x3F;
+
+            if (partitionCount < 4) d = 0;
+            if (partitionCount < 3) c = 0;
+
+            if (a >= b && a >= c && a >= d) return 0;
+            else if (b >= c && b >= d) return 1;
+            else if (c >= d) return 2;
+            return 3;
+        }
+
+        static int Hash52(uint val)
+        {
+            val ^= val >> 15; val -= val << 17; val += val << 7; val += val << 4;
+            val ^= val >> 5; val += val << 16; val ^= val >> 7; val ^= val >> 3;
+            val ^= val << 6; val ^= val >> 17;
+
+            return (int)val;
+        }
+
+        static void UnquantizeTexelWeights(
+            ref Weights outputBuffer,
+            ref IntegerSequence weights,
+            ref TexelWeightParams texelParams,
+            int blockWidth,
+            int blockHeight)
+        {
+            int weightIndices = 0;
+            Weights unquantized;
+            unsafe { _ = &unquantized; } // Skip struct initialization
+
+            Span<IntegerEncoded> weightsList = weights.List;
+            Span<int> unquantized0 = unquantized[0];
+            Span<int> unquantized1 = unquantized[1];
+
+            for (int i = 0; i < weightsList.Length; i++)
+            {
+                unquantized0[weightIndices] = UnquantizeTexelWeight(weightsList[i]);
+
+                if (texelParams.DualPlane)
+                {
+                    i++;
+                    unquantized1[weightIndices] = UnquantizeTexelWeight(weightsList[i]);
+
+                    if (i == weightsList.Length)
+                    {
+                        break;
+                    }
+                }
+
+                if (++weightIndices >= texelParams.Width * texelParams.Height) break;
+            }
+
+            // Do infill if necessary (Section C.2.18) ...
+            int ds = (1024 + blockWidth / 2) / (blockWidth - 1);
+            int dt = (1024 + blockHeight / 2) / (blockHeight - 1);
+
+            int planeScale = texelParams.DualPlane ? 2 : 1;
+
+            for (int plane = 0; plane < planeScale; plane++)
+            {
+                Span<int> unquantizedSpan = unquantized.Get(plane);
+                Span<int> outputSpan = outputBuffer.Get(plane);
+
+                for (int t = 0; t < blockHeight; t++)
+                {
+                    for (int s = 0; s < blockWidth; s++)
+                    {
+                        int cs = ds * s;
+                        int ct = dt * t;
+
+                        int gs = (cs * (texelParams.Width - 1) + 32) >> 6;
+                        int gt = (ct * (texelParams.Height - 1) + 32) >> 6;
+
+                        int js = gs >> 4;
+                        int fs = gs & 0xF;
+
+                        int jt = gt >> 4;
+                        int ft = gt & 0x0F;
+
+                        int w11 = (fs * ft + 8) >> 4;
+
+                        int v0 = js + jt * texelParams.Width;
+
+                        int weight = 8;
+
+                        int wxh = texelParams.Width * texelParams.Height;
+
+                        if (v0 < wxh)
+                        {
+                            weight += unquantizedSpan[v0] * (16 - fs - ft + w11);
+
+                            if (v0 + 1 < wxh)
+                            {
+                                weight += unquantizedSpan[v0 + 1] * (fs - w11);
+                            }
+                        }
+
+                        if (v0 + texelParams.Width < wxh)
+                        {
+                            weight += unquantizedSpan[v0 + texelParams.Width] * (ft - w11);
+
+                            if (v0 + texelParams.Width + 1 < wxh)
+                            {
+                                weight += unquantizedSpan[v0 + texelParams.Width + 1] * w11;
+                            }
+                        }
+
+                        outputSpan[t * blockWidth + s] = weight >> 4;
+                    }
+                }
+            }
+        }
+
+        static int UnquantizeTexelWeight(IntegerEncoded intEncoded)
+        {
+            int bitValue = intEncoded.BitValue;
+            int bitLength = intEncoded.NumberBits;
+
+            int a = Bits.Replicate1_7(bitValue & 1);
+            int b = 0, c = 0, d = 0;
+
+            int result = 0;
+
+            switch (intEncoded.GetEncoding())
+            {
+                case IntegerEncoded.EIntegerEncoding.JustBits:
+                    result = Bits.Replicate(bitValue, bitLength, 6);
+                    break;
+
+                case IntegerEncoded.EIntegerEncoding.Trit:
+                {
+                    d = intEncoded.TritValue;
+                    Debug.Assert(d < 3);
+
+                    switch (bitLength)
+                    {
+                        case 0:
+                        {
+                            result = d switch
+                            {
+                                0 => 0,
+                                1 => 32,
+                                2 => 63,
+                                _ => 0
+                            };
+
+                            break;
+                        }
+
+                        case 1:
+                        {
+                            c = 50;
+                            break;
+                        }
+
+                        case 2:
+                        {
+                            c = 23;
+                            int b2 = (bitValue >> 1) & 1;
+                            b = (b2 << 6) | (b2 << 2) | b2;
+
+                            break;
+                        }
+
+                        case 3:
+                        {
+                            c = 11;
+                            int cb = (bitValue >> 1) & 3;
+                            b = (cb << 5) | cb;
+
+                            break;
+                        }
+
+                        default:
+                            throw new AstcDecoderException("Invalid trit encoding for texel weight.");
+                    }
+
+                    break;
+                }
+
+                case IntegerEncoded.EIntegerEncoding.Quint:
+                {
+                    d = intEncoded.QuintValue;
+                    Debug.Assert(d < 5);
+
+                    switch (bitLength)
+                    {
+                        case 0:
+                        {
+                            result = d switch
+                            {
+                                0 => 0,
+                                1 => 16,
+                                2 => 32,
+                                3 => 47,
+                                4 => 63,
+                                _ => 0
+                            };
+
+                            break;
+                        }
+
+                        case 1:
+                        {
+                            c = 28;
+
+                            break;
+                        }
+
+                        case 2:
+                        {
+                            c = 13;
+                            int b2 = (bitValue >> 1) & 1;
+                            b = (b2 << 6) | (b2 << 1);
+
+                            break;
+                        }
+
+                        default:
+                            throw new AstcDecoderException("Invalid quint encoding for texel weight.");
+                    }
+
+                    break;
+                }
+            }
+
+            if (intEncoded.GetEncoding() != IntegerEncoded.EIntegerEncoding.JustBits && bitLength > 0)
+            {
+                // Decode the value...
+                result = d * c + b;
+                result ^= a;
+                result = (a & 0x20) | (result >> 2);
+            }
+
+            Debug.Assert(result < 64);
+
+            // Change from [0,63] to [0,64]
+            if (result > 32)
+            {
+                result += 1;
+            }
+
+            return result;
+        }
+
+        static byte ReverseByte(byte b)
+        {
+            // Taken from http://graphics.stanford.edu/~seander/bithacks.html#ReverseByteWith64Bits
+            return (byte)((((b) * 0x80200802L) & 0x0884422110L) * 0x0101010101L >> 32);
+        }
+
+        static Span<uint> ReadUintColorValues(int number, Span<int> colorValues, ref int colorValuesPosition)
+        {
+            Span<int> ret = colorValues.Slice(colorValuesPosition, number);
+
+            colorValuesPosition += number;
+
+            return MemoryMarshal.Cast<int, uint>(ret);
+        }
+
+        static Span<int> ReadIntColorValues(int number, Span<int> colorValues, ref int colorValuesPosition)
+        {
+            Span<int> ret = colorValues.Slice(colorValuesPosition, number);
+
+            colorValuesPosition += number;
+
+            return ret;
+        }
+
+        static void ComputeEndpoints(
+            Span<AstcPixel> endPoints,
+            Span<int> colorValues,
+            uint colorEndpointMode,
+            ref int colorValuesPosition)
+        {
+            switch (colorEndpointMode)
+            {
+                case 0:
+                {
+                    Span<uint> val = ReadUintColorValues(2, colorValues, ref colorValuesPosition);
+
+                    endPoints[0] = new AstcPixel(0xFF, (short)val[0], (short)val[0], (short)val[0]);
+                    endPoints[1] = new AstcPixel(0xFF, (short)val[1], (short)val[1], (short)val[1]);
+
+                    break;
+                }
+
+
+                case 1:
+                {
+                    Span<uint> val = ReadUintColorValues(2, colorValues, ref colorValuesPosition);
+                    int l0 = (int)((val[0] >> 2) | (val[1] & 0xC0));
+                    int l1 = (int)Math.Max(l0 + (val[1] & 0x3F), 0xFFU);
+
+                    endPoints[0] = new AstcPixel(0xFF, (short)l0, (short)l0, (short)l0);
+                    endPoints[1] = new AstcPixel(0xFF, (short)l1, (short)l1, (short)l1);
+
+                    break;
+                }
+
+                case 4:
+                {
+                    Span<uint> val = ReadUintColorValues(4, colorValues, ref colorValuesPosition);
+
+                    endPoints[0] = new AstcPixel((short)val[2], (short)val[0], (short)val[0], (short)val[0]);
+                    endPoints[1] = new AstcPixel((short)val[3], (short)val[1], (short)val[1], (short)val[1]);
+
+                    break;
+                }
+
+                case 5:
+                {
+                    Span<int> val = ReadIntColorValues(4, colorValues, ref colorValuesPosition);
+
+                    Bits.BitTransferSigned(ref val[1], ref val[0]);
+                    Bits.BitTransferSigned(ref val[3], ref val[2]);
+
+                    endPoints[0] = new AstcPixel((short)val[2], (short)val[0], (short)val[0], (short)val[0]);
+                    endPoints[1] = new AstcPixel((short)(val[2] + val[3]), (short)(val[0] + val[1]), (short)(val[0] + val[1]), (short)(val[0] + val[1]));
+
+                    endPoints[0].ClampByte();
+                    endPoints[1].ClampByte();
+
+                    break;
+                }
+
+                case 6:
+                {
+                    Span<uint> val = ReadUintColorValues(4, colorValues, ref colorValuesPosition);
+
+                    endPoints[0] = new AstcPixel(0xFF, (short)(val[0] * val[3] >> 8), (short)(val[1] * val[3] >> 8), (short)(val[2] * val[3] >> 8));
+                    endPoints[1] = new AstcPixel(0xFF, (short)val[0], (short)val[1], (short)val[2]);
+
+                    break;
+                }
+
+                case 8:
+                {
+                    Span<uint> val = ReadUintColorValues(6, colorValues, ref colorValuesPosition);
+
+                    if (val[1] + val[3] + val[5] >= val[0] + val[2] + val[4])
+                    {
+                        endPoints[0] = new AstcPixel(0xFF, (short)val[0], (short)val[2], (short)val[4]);
+                        endPoints[1] = new AstcPixel(0xFF, (short)val[1], (short)val[3], (short)val[5]);
+                    }
+                    else
+                    {
+                        endPoints[0] = AstcPixel.BlueContract(0xFF, (short)val[1], (short)val[3], (short)val[5]);
+                        endPoints[1] = AstcPixel.BlueContract(0xFF, (short)val[0], (short)val[2], (short)val[4]);
+                    }
+
+                    break;
+                }
+
+                case 9:
+                {
+                    Span<int> val = ReadIntColorValues(6, colorValues, ref colorValuesPosition);
+
+                    Bits.BitTransferSigned(ref val[1], ref val[0]);
+                    Bits.BitTransferSigned(ref val[3], ref val[2]);
+                    Bits.BitTransferSigned(ref val[5], ref val[4]);
+
+                    if (val[1] + val[3] + val[5] >= 0)
+                    {
+                        endPoints[0] = new AstcPixel(0xFF, (short)val[0], (short)val[2], (short)val[4]);
+                        endPoints[1] = new AstcPixel(0xFF, (short)(val[0] + val[1]), (short)(val[2] + val[3]), (short)(val[4] + val[5]));
+                    }
+                    else
+                    {
+                        endPoints[0] = AstcPixel.BlueContract(0xFF, val[0] + val[1], val[2] + val[3], val[4] + val[5]);
+                        endPoints[1] = AstcPixel.BlueContract(0xFF, val[0], val[2], val[4]);
+                    }
+
+                    endPoints[0].ClampByte();
+                    endPoints[1].ClampByte();
+
+                    break;
+                }
+
+                case 10:
+                {
+                    Span<uint> val = ReadUintColorValues(6, colorValues, ref colorValuesPosition);
+
+                    endPoints[0] = new AstcPixel((short)val[4], (short)(val[0] * val[3] >> 8), (short)(val[1] * val[3] >> 8), (short)(val[2] * val[3] >> 8));
+                    endPoints[1] = new AstcPixel((short)val[5], (short)val[0], (short)val[1], (short)val[2]);
+
+                    break;
+                }
+
+                case 12:
+                {
+                    Span<uint> val = ReadUintColorValues(8, colorValues, ref colorValuesPosition);
+
+                    if (val[1] + val[3] + val[5] >= val[0] + val[2] + val[4])
+                    {
+                        endPoints[0] = new AstcPixel((short)val[6], (short)val[0], (short)val[2], (short)val[4]);
+                        endPoints[1] = new AstcPixel((short)val[7], (short)val[1], (short)val[3], (short)val[5]);
+                    }
+                    else
+                    {
+                        endPoints[0] = AstcPixel.BlueContract((short)val[7], (short)val[1], (short)val[3], (short)val[5]);
+                        endPoints[1] = AstcPixel.BlueContract((short)val[6], (short)val[0], (short)val[2], (short)val[4]);
+                    }
+
+                    break;
+                }
+
+                case 13:
+                {
+                    Span<int> val = ReadIntColorValues(8, colorValues, ref colorValuesPosition);
+
+                    Bits.BitTransferSigned(ref val[1], ref val[0]);
+                    Bits.BitTransferSigned(ref val[3], ref val[2]);
+                    Bits.BitTransferSigned(ref val[5], ref val[4]);
+                    Bits.BitTransferSigned(ref val[7], ref val[6]);
+
+                    if (val[1] + val[3] + val[5] >= 0)
+                    {
+                        endPoints[0] = new AstcPixel((short)val[6], (short)val[0], (short)val[2], (short)val[4]);
+                        endPoints[1] = new AstcPixel((short)(val[7] + val[6]), (short)(val[0] + val[1]), (short)(val[2] + val[3]), (short)(val[4] + val[5]));
+                    }
+                    else
+                    {
+                        endPoints[0] = AstcPixel.BlueContract(val[6] + val[7], val[0] + val[1], val[2] + val[3], val[4] + val[5]);
+                        endPoints[1] = AstcPixel.BlueContract(val[6], val[0], val[2], val[4]);
+                    }
+
+                    endPoints[0].ClampByte();
+                    endPoints[1].ClampByte();
+
+                    break;
+                }
+
+                default:
+                    throw new AstcDecoderException("Unsupported color endpoint mode (is it HDR?)");
+            }
+        }
+
+        static void DecodeColorValues(
+            Span<int> outputValues,
+            ref BitStream128 colorBitStream,
+            Span<uint> modes,
+            int numberPartitions,
+            int numberBitsForColorData)
+        {
+            // First figure out how many color values we have
+            int numberValues = 0;
+
+            for (int i = 0; i < numberPartitions; i++)
+            {
+                numberValues += (int)((modes[i] >> 2) + 1) << 1;
+            }
+
+            // Then based on the number of values and the remaining number of bits,
+            // figure out the max value for each of them...
+            int range = 256;
+
+            while (--range > 0)
+            {
+                IntegerEncoded intEncoded = IntegerEncoded.CreateEncoding(range);
+                int bitLength = intEncoded.GetBitLength(numberValues);
+
+                if (bitLength <= numberBitsForColorData)
+                {
+                    // Find the smallest possible range that matches the given encoding
+                    while (--range > 0)
+                    {
+                        IntegerEncoded newIntEncoded = IntegerEncoded.CreateEncoding(range);
+                        if (!newIntEncoded.MatchesEncoding(intEncoded))
+                        {
+                            break;
+                        }
+                    }
+
+                    // Return to last matching range.
+                    range++;
+                    break;
+                }
+            }
+
+            // We now have enough to decode our integer sequence.
+            IntegerSequence integerEncodedSequence;
+            unsafe { _ = &integerEncodedSequence; } // Skip struct initialization
+            integerEncodedSequence.Reset();
+
+            IntegerEncoded.DecodeIntegerSequence(ref integerEncodedSequence, ref colorBitStream, range, numberValues);
+
+            // Once we have the decoded values, we need to dequantize them to the 0-255 range
+            // This procedure is outlined in ASTC spec C.2.13
+            int outputIndices = 0;
+
+            foreach (ref IntegerEncoded intEncoded in integerEncodedSequence.List)
+            {
+                int bitLength = intEncoded.NumberBits;
+                int bitValue = intEncoded.BitValue;
+
+                Debug.Assert(bitLength >= 1);
+
+                int a = 0, b = 0, c = 0, d = 0;
+                // A is just the lsb replicated 9 times.
+                a = Bits.Replicate(bitValue & 1, 1, 9);
+
+                switch (intEncoded.GetEncoding())
+                {
+                    case IntegerEncoded.EIntegerEncoding.JustBits:
+                    {
+                        outputValues[outputIndices++] = Bits.Replicate(bitValue, bitLength, 8);
+
+                        break;
+                    }
+
+                    case IntegerEncoded.EIntegerEncoding.Trit:
+                    {
+                        d = intEncoded.TritValue;
+
+                        switch (bitLength)
+                        {
+                            case 1:
+                            {
+                                c = 204;
+
+                                break;
+                            }
+
+                            case 2:
+                            {
+                                c = 93;
+                                // B = b000b0bb0
+                                int b2 = (bitValue >> 1) & 1;
+                                b = (b2 << 8) | (b2 << 4) | (b2 << 2) | (b2 << 1);
+
+                                break;
+                            }
+
+                            case 3:
+                            {
+                                c = 44;
+                                // B = cb000cbcb
+                                int cb = (bitValue >> 1) & 3;
+                                b = (cb << 7) | (cb << 2) | cb;
+
+                                break;
+                            }
+
+
+                            case 4:
+                            {
+                                c = 22;
+                                // B = dcb000dcb
+                                int dcb = (bitValue >> 1) & 7;
+                                b = (dcb << 6) | dcb;
+
+                                break;
+                            }
+
+                            case 5:
+                            {
+                                c = 11;
+                                // B = edcb000ed
+                                int edcb = (bitValue >> 1) & 0xF;
+                                b = (edcb << 5) | (edcb >> 2);
+
+                                break;
+                            }
+
+                            case 6:
+                            {
+                                c = 5;
+                                // B = fedcb000f
+                                int fedcb = (bitValue >> 1) & 0x1F;
+                                b = (fedcb << 4) | (fedcb >> 4);
+
+                                break;
+                            }
+
+                            default:
+                                throw new AstcDecoderException("Unsupported trit encoding for color values.");
+                        }
+
+                        break;
+                    }
+
+                    case IntegerEncoded.EIntegerEncoding.Quint:
+                    {
+                        d = intEncoded.QuintValue;
+
+                        switch (bitLength)
+                        {
+                            case 1:
+                            {
+                                c = 113;
+
+                                break;
+                            }
+
+                            case 2:
+                            {
+                                c = 54;
+                                // B = b0000bb00
+                                int b2 = (bitValue >> 1) & 1;
+                                b = (b2 << 8) | (b2 << 3) | (b2 << 2);
+
+                                break;
+                            }
+
+                            case 3:
+                            {
+                                c = 26;
+                                // B = cb0000cbc
+                                int cb = (bitValue >> 1) & 3;
+                                b = (cb << 7) | (cb << 1) | (cb >> 1);
+
+                                break;
+                            }
+
+                            case 4:
+                            {
+                                c = 13;
+                                // B = dcb0000dc
+                                int dcb = (bitValue >> 1) & 7;
+                                b = (dcb << 6) | (dcb >> 1);
+
+                                break;
+                            }
+
+                            case 5:
+                            {
+                                c = 6;
+                                // B = edcb0000e
+                                int edcb = (bitValue >> 1) & 0xF;
+                                b = (edcb << 5) | (edcb >> 3);
+
+                                break;
+                            }
+
+                            default:
+                                throw new AstcDecoderException("Unsupported quint encoding for color values.");
+                        }
+                        break;
+                    }
+                }
+
+                if (intEncoded.GetEncoding() != IntegerEncoded.EIntegerEncoding.JustBits)
+                {
+                    int T = d * c + b;
+                    T ^= a;
+                    T = (a & 0x80) | (T >> 2);
+
+                    outputValues[outputIndices++] = T;
+                }
+            }
+
+            // Make sure that each of our values is in the proper range...
+            for (int i = 0; i < numberValues; i++)
+            {
+                Debug.Assert(outputValues[i] <= 255);
+            }
+        }
+
+        static void FillVoidExtentLdr(ref BitStream128 bitStream, Span<int> outputBuffer, int blockWidth, int blockHeight)
+        {
+            // Don't actually care about the void extent, just read the bits...
+            for (int i = 0; i < 4; ++i)
+            {
+                bitStream.ReadBits(13);
+            }
+
+            // Decode the RGBA components and renormalize them to the range [0, 255]
+            ushort r = (ushort)bitStream.ReadBits(16);
+            ushort g = (ushort)bitStream.ReadBits(16);
+            ushort b = (ushort)bitStream.ReadBits(16);
+            ushort a = (ushort)bitStream.ReadBits(16);
+
+            int rgba = (r >> 8) | (g & 0xFF00) | ((b) & 0xFF00) << 8 | ((a) & 0xFF00) << 16;
+
+            for (int j = 0; j < blockHeight; j++)
+            {
+                for (int i = 0; i < blockWidth; i++)
+                {
+                    outputBuffer[j * blockWidth + i] = rgba;
+                }
+            }
+        }
+
+        static void DecodeBlockInfo(ref BitStream128 bitStream, out TexelWeightParams texelParams)
+        {
+            texelParams = new TexelWeightParams();
+
+            // Read the entire block mode all at once
+            ushort modeBits = (ushort)bitStream.ReadBits(11);
+
+            // Does this match the void extent block mode?
+            if ((modeBits & 0x01FF) == 0x1FC)
+            {
+                if ((modeBits & 0x200) != 0)
+                {
+                    texelParams.VoidExtentHdr = true;
+                }
+                else
+                {
+                    texelParams.VoidExtentLdr = true;
+                }
+
+                // Next two bits must be one.
+                if ((modeBits & 0x400) == 0 || bitStream.ReadBits(1) == 0)
+                {
+                    texelParams.Error = true;
+                }
+
+                return;
+            }
+
+            // First check if the last four bits are zero
+            if ((modeBits & 0xF) == 0)
+            {
+                texelParams.Error = true;
+
+                return;
+            }
+
+            // If the last two bits are zero, then if bits
+            // [6-8] are all ones, this is also reserved.
+            if ((modeBits & 0x3) == 0 && (modeBits & 0x1C0) == 0x1C0)
+            {
+                texelParams.Error = true;
+
+                return;
+            }
+
+            // Otherwise, there is no error... Figure out the layout
+            // of the block mode. Layout is determined by a number
+            // between 0 and 9 corresponding to table C.2.8 of the
+            // ASTC spec.
+            int layout;
+
+            if ((modeBits & 0x1) != 0 || (modeBits & 0x2) != 0)
+            {
+                // layout is in [0-4]
+                if ((modeBits & 0x8) != 0)
+                {
+                    // layout is in [2-4]
+                    if ((modeBits & 0x4) != 0)
+                    {
+                        // layout is in [3-4]
+                        if ((modeBits & 0x100) != 0)
+                        {
+                            layout = 4;
+                        }
+                        else
+                        {
+                            layout = 3;
+                        }
+                    }
+                    else
+                    {
+                        layout = 2;
+                    }
+                }
+                else
+                {
+                    // layout is in [0-1]
+                    if ((modeBits & 0x4) != 0)
+                    {
+                        layout = 1;
+                    }
+                    else
+                    {
+                        layout = 0;
+                    }
+                }
+            }
+            else
+            {
+                // layout is in [5-9]
+                if ((modeBits & 0x100) != 0)
+                {
+                    // layout is in [7-9]
+                    if ((modeBits & 0x80) != 0)
+                    {
+                        // layout is in [7-8]
+                        Debug.Assert((modeBits & 0x40) == 0);
+
+                        if ((modeBits & 0x20) != 0)
+                        {
+                            layout = 8;
+                        }
+                        else
+                        {
+                            layout = 7;
+                        }
+                    }
+                    else
+                    {
+                        layout = 9;
+                    }
+                }
+                else
+                {
+                    // layout is in [5-6]
+                    if ((modeBits & 0x80) != 0)
+                    {
+                        layout = 6;
+                    }
+                    else
+                    {
+                        layout = 5;
+                    }
+                }
+            }
+
+            Debug.Assert(layout < 10);
+
+            // Determine R
+            int r = (modeBits >> 4) & 1;
+            if (layout < 5)
+            {
+                r |= (modeBits & 0x3) << 1;
+            }
+            else
+            {
+                r |= (modeBits & 0xC) >> 1;
+            }
+
+            Debug.Assert(2 <= r && r <= 7);
+
+            // Determine width & height
+            switch (layout)
+            {
+                case 0:
+                {
+                    int a = (modeBits >> 5) & 0x3;
+                    int b = (modeBits >> 7) & 0x3;
+
+                    texelParams.Width = b + 4;
+                    texelParams.Height = a + 2;
+
+                    break;
+                }
+
+                case 1:
+                {
+                    int a = (modeBits >> 5) & 0x3;
+                    int b = (modeBits >> 7) & 0x3;
+
+                    texelParams.Width = b + 8;
+                    texelParams.Height = a + 2;
+
+                    break;
+                }
+
+                case 2:
+                {
+                    int a = (modeBits >> 5) & 0x3;
+                    int b = (modeBits >> 7) & 0x3;
+
+                    texelParams.Width = a + 2;
+                    texelParams.Height = b + 8;
+
+                    break;
+                }
+
+                case 3:
+                {
+                    int a = (modeBits >> 5) & 0x3;
+                    int b = (modeBits >> 7) & 0x1;
+
+                    texelParams.Width = a + 2;
+                    texelParams.Height = b + 6;
+
+                    break;
+                }
+
+                case 4:
+                {
+                    int a = (modeBits >> 5) & 0x3;
+                    int b = (modeBits >> 7) & 0x1;
+
+                    texelParams.Width = b + 2;
+                    texelParams.Height = a + 2;
+
+                    break;
+                }
+
+                case 5:
+                {
+                    int a = (modeBits >> 5) & 0x3;
+
+                    texelParams.Width = 12;
+                    texelParams.Height = a + 2;
+
+                    break;
+                }
+
+                case 6:
+                {
+                    int a = (modeBits >> 5) & 0x3;
+
+                    texelParams.Width = a + 2;
+                    texelParams.Height = 12;
+
+                    break;
+                }
+
+                case 7:
+                {
+                    texelParams.Width = 6;
+                    texelParams.Height = 10;
+
+                    break;
+                }
+
+                case 8:
+                {
+                    texelParams.Width = 10;
+                    texelParams.Height = 6;
+                    break;
+                }
+
+                case 9:
+                {
+                    int a = (modeBits >> 5) & 0x3;
+                    int b = (modeBits >> 9) & 0x3;
+
+                    texelParams.Width = a + 6;
+                    texelParams.Height = b + 6;
+
+                    break;
+                }
+
+                default:
+                    // Don't know this layout...
+                    texelParams.Error = true;
+                    break;
+            }
+
+            // Determine whether or not we're using dual planes
+            // and/or high precision layouts.
+            bool d = ((layout != 9) && ((modeBits & 0x400) != 0));
+            bool h = (layout != 9) && ((modeBits & 0x200) != 0);
+
+            if (h)
+            {
+                ReadOnlySpan<byte> maxWeights = new byte[] { 9, 11, 15, 19, 23, 31 };
+                texelParams.MaxWeight = maxWeights[r - 2];
+            }
+            else
+            {
+                ReadOnlySpan<byte> maxWeights = new byte[] { 1, 2, 3, 4, 5, 7 };
+                texelParams.MaxWeight = maxWeights[r - 2];
+            }
+
+            texelParams.DualPlane = d;
+        }
+    }
+}
author	TSR Berry <20988865+TSRBerry@users.noreply.github.com>	2023-04-08 01:22:00 +0200
committer	Mary <thog@protonmail.com>	2023-04-27 23:51:14 +0200
commit	cee712105850ac3385cd0091a923438167433f9f (patch)
tree	4a5274b21d8b7f938c0d0ce18736d3f2993b11b1 /src/Ryujinx.Graphics.Texture/Astc/AstcDecoder.cs
parent	cd124bda587ef09668a971fa1cac1c3f0cfc9f21 (diff)