Initial work

1 files changed, 0 insertions, 1385 deletions

diff --git a/Ryujinx.Graphics/Graphics3d/Texture/AstcDecoder.cs b/Ryujinx.Graphics/Graphics3d/Texture/AstcDecoder.cs
deleted file mode 100644
index 3e68be7d..00000000
--- a/Ryujinx.Graphics/Graphics3d/Texture/AstcDecoder.cs
+++ /dev/null
@@ -1,1385 +0,0 @@
-using System;
-using System.Collections;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.IO;
-
-namespace Ryujinx.Graphics.Texture
-{
-    public class AstcDecoderException : Exception
-    {
-        public AstcDecoderException(string exMsg) : base(exMsg) { }
-    }
-
-    // https://github.com/GammaUNC/FasTC/blob/master/ASTCEncoder/src/Decompressor.cpp
-    public static class AstcDecoder
-    {
-        struct TexelWeightParams
-        {
-            public int  Width;
-            public int  Height;
-            public bool DualPlane;
-            public int  MaxWeight;
-            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 byte[] DecodeToRgba8888(
-            byte[] inputBuffer, 
-            int    blockX, 
-            int    blockY, 
-            int    blockZ, 
-            int    x, 
-            int    y, 
-            int    z)
-        {
-            using (MemoryStream inputStream = new MemoryStream(inputBuffer))
-            {
-                BinaryReader binReader = new BinaryReader(inputStream);
-
-                if (blockX > 12 || blockY > 12)
-                {
-                    throw new AstcDecoderException("Block size unsupported!");
-                }
-
-                if (blockZ != 1 || z != 1)
-                {
-                    // TODO: Support 3D textures?
-                    throw new AstcDecoderException("3D compressed textures unsupported!");
-                }
-
-                using (MemoryStream outputStream = new MemoryStream())
-                {
-                    int blockIndex = 0;
-
-                    for (int j = 0; j < y; j += blockY)
-                    {
-                        for (int i = 0; i < x; i += blockX)
-                        {
-                            int[] decompressedData = new int[144];
-
-                            DecompressBlock(binReader.ReadBytes(0x10), decompressedData, blockX, blockY);
-
-                            int decompressedWidth = Math.Min(blockX, x - i);
-                            int decompressedHeight = Math.Min(blockY, y - j);
-                            int baseOffsets = (j * x + i) * 4;
-
-                            for (int jj = 0; jj < decompressedHeight; jj++)
-                            {
-                                outputStream.Seek(baseOffsets + jj * x * 4, SeekOrigin.Begin);
-
-                                byte[] outputBuffer = new byte[decompressedData.Length * sizeof(int)];
-                                Buffer.BlockCopy(decompressedData, 0, outputBuffer, 0, outputBuffer.Length);
-
-                                outputStream.Write(outputBuffer, jj * blockX * 4, decompressedWidth * 4);
-                            }
-
-                            blockIndex++;
-                        }
-                    }
-
-                    return outputStream.ToArray();
-                }
-            }
-        }
-
-        public static bool DecompressBlock(
-            byte[] inputBuffer, 
-            int[]  outputBuffer, 
-            int    blockWidth, 
-            int    blockHeight)
-        {
-            BitArrayStream    bitStream   = new BitArrayStream(new BitArray(inputBuffer));
-            TexelWeightParams texelParams = DecodeBlockInfo(bitStream);
-
-            if (texelParams.Error)
-            {
-                throw new AstcDecoderException("Invalid block mode");
-            }
-
-            if (texelParams.VoidExtentLdr)
-            {
-                FillVoidExtentLdr(bitStream, outputBuffer, blockWidth, blockHeight);
-
-                return true;
-            }
-
-            if (texelParams.VoidExtentHdr)
-            {
-                throw new AstcDecoderException("HDR void extent blocks are unsupported!");
-            }
-
-            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      = -1;
-            int    partitionIndex;
-            uint[] colorEndpointMode = { 0, 0, 0, 0 };
-
-            BitArrayStream colorEndpointStream = new BitArrayStream(new BitArray(16 * 8));
-
-            // 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    = 128 - numberWeightBits - bitStream.Position;
-
-            // 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;
-
-                bool[] c = new bool[4];
-
-                for (int i = 0; i < numberPartitions; i++)
-                {
-                    c[i] = (tempColorEndpointMode & 1) != 0;
-                    tempColorEndpointMode >>= 1;
-                }
-
-                byte[] m = new 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 (uint 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.Position + texelParams.GetPackedBitSize() == 128);
-
-            // Decode both color data and texel weight data
-            int[] colorValues = new int[32]; // Four values * two endpoints * four maximum partitions
-            DecodeColorValues(colorValues, colorEndpointStream.ToByteArray(), colorEndpointMode, numberPartitions, colorDataBits);
-
-            AstcPixel[][] endPoints = new AstcPixel[4][];
-            endPoints[0] = new AstcPixel[2];
-            endPoints[1] = new AstcPixel[2];
-            endPoints[2] = new AstcPixel[2];
-            endPoints[3] = new AstcPixel[2];
-
-            int colorValuesPosition = 0;
-
-            for (int i = 0; i < numberPartitions; i++)
-            {
-                ComputeEndpoints(endPoints[i], colorValues, colorEndpointMode[i], ref colorValuesPosition);
-            }
-
-            // Read the texel weight data.
-            byte[] texelWeightData = (byte[])inputBuffer.Clone();
-
-            // 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;
-
-            List<IntegerEncoded> texelWeightValues = new List<IntegerEncoded>();
-            BitArrayStream weightBitStream         = new BitArrayStream(new BitArray(texelWeightData));
-
-            IntegerEncoded.DecodeIntegerSequence(texelWeightValues, weightBitStream, texelParams.MaxWeight, texelParams.GetNumWeightValues());
-            
-            // Blocks can be at most 12x12, so we can have as many as 144 weights
-            int[][] weights = new int[2][];
-            weights[0] = new int[144];
-            weights[1] = new int[144];
-
-            UnquantizeTexelWeights(weights, texelWeightValues, texelParams, blockWidth, blockHeight);
-
-            // 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(0, 0, 0, 0);
-                    for (int component = 0; component < 4; component++)
-                    {
-                        int component0 = endPoints[partition][0].GetComponent(component);
-                        component0     = BitArrayStream.Replicate(component0, 8, 16);
-                        int component1 = endPoints[partition][1].GetComponent(component);
-                        component1     = BitArrayStream.Replicate(component1, 8, 16);
-
-                        int plane = 0;
-
-                        if (texelParams.DualPlane && (((planeIndices + 1) & 3) == component))
-                        {
-                            plane = 1;
-                        }
-
-                        int weight = weights[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;
-        }
-
-        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(
-            int[][]              outputBuffer, 
-            List<IntegerEncoded> weights, 
-            TexelWeightParams    texelParams, 
-            int                  blockWidth, 
-            int                  blockHeight)
-        {
-            int weightIndices   = 0;
-            int[][] unquantized = new int[2][];
-            unquantized[0]      = new int[144];
-            unquantized[1]      = new int[144];
-
-            for (int i = 0; i < weights.Count; i++)
-            {
-                unquantized[0][weightIndices] = UnquantizeTexelWeight(weights[i]);
-
-                if (texelParams.DualPlane)
-                {
-                    i++;
-                    unquantized[1][weightIndices] = UnquantizeTexelWeight(weights[i]);
-
-                    if (i == weights.Count)
-                    {
-                        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++)
-            {
-                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 w10 = ft - w11;
-                        int w01 = fs - w11;
-                        int w00 = 16 - fs - ft + w11;
-
-                        int v0 = js + jt * texelParams.Width;
-
-                        int p00 = 0;
-                        int p01 = 0;
-                        int p10 = 0;
-                        int p11 = 0;
-
-                        if (v0 < (texelParams.Width * texelParams.Height))
-                        {
-                            p00 = unquantized[plane][v0];
-                        }
-
-                        if (v0 + 1 < (texelParams.Width * texelParams.Height))
-                        {
-                            p01 = unquantized[plane][v0 + 1];
-                        }
-                        
-                        if (v0 + texelParams.Width < (texelParams.Width * texelParams.Height))
-                        {
-                            p10 = unquantized[plane][v0 + texelParams.Width];
-                        }
-                        
-                        if (v0 + texelParams.Width + 1 < (texelParams.Width * texelParams.Height))
-                        {
-                            p11 = unquantized[plane][v0 + texelParams.Width + 1];
-                        }
-
-                        outputBuffer[plane][t * blockWidth + s] = (p00 * w00 + p01 * w01 + p10 * w10 + p11 * w11 + 8) >> 4;
-                    }
-                }
-            }
-        }
-
-        static int UnquantizeTexelWeight(IntegerEncoded intEncoded)
-        {
-            int bitValue  = intEncoded.BitValue;
-            int bitLength = intEncoded.NumberBits;
-
-            int a = BitArrayStream.Replicate(bitValue & 1, 1, 7);
-            int b = 0, c = 0, d = 0;
-
-            int result = 0;
-
-            switch (intEncoded.GetEncoding())
-            {
-                case IntegerEncoded.EIntegerEncoding.JustBits:
-                    result = BitArrayStream.Replicate(bitValue, bitLength, 6);
-                    break;
-
-                case IntegerEncoded.EIntegerEncoding.Trit:
-                {
-                    d = intEncoded.TritValue;
-                    Debug.Assert(d < 3);
-
-                    switch (bitLength)
-                    {
-                        case 0:
-                        {
-                            int[] results = { 0, 32, 63 };
-                            result = results[d];
-
-                            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:
-                        {
-                            int[] results = { 0, 16, 32, 47, 63 };
-                            result = results[d];
-
-                            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 uint[] ReadUintColorValues(int number, int[] colorValues, ref int colorValuesPosition)
-        {
-            uint[] ret = new uint[number];
-
-            for (int i = 0; i < number; i++)
-            {
-                ret[i] = (uint)colorValues[colorValuesPosition++];
-            }
-
-            return ret;
-        }
-
-        static int[] ReadIntColorValues(int number, int[] colorValues, ref int colorValuesPosition)
-        {
-            int[] ret = new int[number];
-
-            for (int i = 0; i < number; i++)
-            {
-                ret[i] = colorValues[colorValuesPosition++];
-            }
-
-            return ret;
-        }
-
-        static void ComputeEndpoints(
-            AstcPixel[] endPoints, 
-            int[]       colorValues, 
-            uint        colorEndpointMode, 
-            ref int     colorValuesPosition)
-        {
-            switch (colorEndpointMode)
-            {
-                case 0:
-                {
-                    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:
-                {
-                    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:
-                {
-                    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:
-                {
-                    int[] val = ReadIntColorValues(4, colorValues, ref colorValuesPosition);
-
-                    BitArrayStream.BitTransferSigned(ref val[1], ref val[0]);
-                    BitArrayStream.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:
-                {
-                    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:
-                {
-                    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:
-                {
-                    int[] val = ReadIntColorValues(6, colorValues, ref colorValuesPosition);
-
-                    BitArrayStream.BitTransferSigned(ref val[1], ref val[0]);
-                    BitArrayStream.BitTransferSigned(ref val[3], ref val[2]);
-                    BitArrayStream.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:
-                {
-                    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:
-                {
-                    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:
-                {
-                    int[] val = ReadIntColorValues(8, colorValues, ref colorValuesPosition);
-
-                    BitArrayStream.BitTransferSigned(ref val[1], ref val[0]);
-                    BitArrayStream.BitTransferSigned(ref val[3], ref val[2]);
-                    BitArrayStream.BitTransferSigned(ref val[5], ref val[4]);
-                    BitArrayStream.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(
-            int[]  outputValues, 
-            byte[] inputData, 
-            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.
-            List<IntegerEncoded> integerEncodedSequence = new List<IntegerEncoded>();
-            BitArrayStream colorBitStream               = new BitArrayStream(new BitArray(inputData));
-
-            IntegerEncoded.DecodeIntegerSequence(integerEncodedSequence, 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 (IntegerEncoded intEncoded in integerEncodedSequence)
-            {
-                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 = BitArrayStream.Replicate(bitValue & 1, 1, 9);
-
-                switch (intEncoded.GetEncoding())
-                {
-                    case IntegerEncoded.EIntegerEncoding.JustBits:
-                    {
-                        outputValues[outputIndices++] = BitArrayStream.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(BitArrayStream bitStream, 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 TexelWeightParams DecodeBlockInfo(BitArrayStream bitStream)
-        {
-            TexelWeightParams 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 texelParams;
-            }
-
-            // First check if the last four bits are zero
-            if ((modeBits & 0xF) == 0)
-            {
-                texelParams.Error = true;
-                return texelParams;
-            }
-
-            // 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 texelParams;
-            }
-
-            // 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 = 0;
-
-            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)
-            {
-                int[] maxWeights = { 9, 11, 15, 19, 23, 31 };
-                texelParams.MaxWeight = maxWeights[r - 2];
-            }
-            else
-            {
-                int[] maxWeights = { 1, 2, 3, 4, 5, 7 };
-                texelParams.MaxWeight = maxWeights[r - 2];
-            }
-
-            texelParams.DualPlane = d;
-
-            return texelParams;
-        }
-    }
-}