using System; using System.Diagnostics; using System.Drawing; using Toolbox.Library; using System.Runtime.InteropServices; using DirectXTexNet; namespace Toolbox.Library { public class DDSCompressor { //Huge thanks to gdkchan and AbooodXD for the method of decomp BC5/BC4. //Todo. Add these to DDS code and add in methods to compress and decode more formats //BC7 also needs to be decompressed properly since OpenTK can't decompress those //BC4 actually breaks a bit with artifacts so i'll need to go back and fix private static byte[] BCnDecodeTile(byte[] Input, int Offset, bool IsBC1) { Color[] CLUT = new Color[4]; int c0 = Get16(Input, Offset + 0); int c1 = Get16(Input, Offset + 2); CLUT[0] = DecodeRGB565(c0); CLUT[1] = DecodeRGB565(c1); CLUT[2] = CalculateCLUT2(CLUT[0], CLUT[1], c0, c1, IsBC1); CLUT[3] = CalculateCLUT3(CLUT[0], CLUT[1], c0, c1, IsBC1); int Indices = Get32(Input, Offset + 4); int IdxShift = 0; byte[] Output = new byte[4 * 4 * 4]; int OOffset = 0; for (int TY = 0; TY < 4; TY++) { for (int TX = 0; TX < 4; TX++) { int Idx = (Indices >> IdxShift) & 3; IdxShift += 2; Color Pixel = CLUT[Idx]; Output[OOffset + 0] = Pixel.B; Output[OOffset + 1] = Pixel.G; Output[OOffset + 2] = Pixel.R; Output[OOffset + 3] = Pixel.A; OOffset += 4; } } return Output; } private static Color DecodeRGB565(int Value) { int B = ((Value >> 0) & 0x1f) << 3; int G = ((Value >> 5) & 0x3f) << 2; int R = ((Value >> 11) & 0x1f) << 3; return Color.FromArgb( R | (R >> 5), G | (G >> 6), B | (B >> 5)); } private static Color CalculateCLUT2(Color C0, Color C1, int c0, int c1, bool IsBC1) { if (c0 > c1 || !IsBC1) { return Color.FromArgb( (2 * C0.R + C1.R) / 3, (2 * C0.G + C1.G) / 3, (2 * C0.B + C1.B) / 3); } else { return Color.FromArgb( (C0.R + C1.R) / 2, (C0.G + C1.G) / 2, (C0.B + C1.B) / 2); } } private static Color CalculateCLUT3(Color C0, Color C1, int c0, int c1, bool IsBC1) { if (c0 > c1 || !IsBC1) { return Color.FromArgb( (2 * C1.R + C0.R) / 3, (2 * C1.G + C0.G) / 3, (2 * C1.B + C0.B) / 3); } return Color.Transparent; } public static Bitmap DecompressBC1(Byte[] data, int width, int height, bool IsSRGB) { int W = (width + 3) / 4; int H = (height + 3) / 4; byte[] Output = new byte[W * H * 64]; for (int Y = 0; Y < H; Y++) { for (int X = 0; X < W; X++) { int IOffs = (Y * W + X) * 8; byte[] Tile = BCnDecodeTile(data, IOffs, true); int TOffset = 0; for (int TY = 0; TY < 4; TY++) { for (int TX = 0; TX < 4; TX++) { int OOffset = (X * 4 + TX + (Y * 4 + TY) * W * 4) * 4; Output[OOffset + 0] = Tile[TOffset + 0]; Output[OOffset + 1] = Tile[TOffset + 1]; Output[OOffset + 2] = Tile[TOffset + 2]; Output[OOffset + 3] = Tile[TOffset + 3]; TOffset += 4; } } } } return BitmapExtension.GetBitmap(Output, W * 4, H * 4); } public static Bitmap DecompressBC3(Byte[] data, int width, int height, bool IsSRGB) { int W = (width + 3) / 4; int H = (height + 3) / 4; byte[] Output = new byte[W * H * 64]; for (int Y = 0; Y < H; Y++) { for (int X = 0; X < W; X++) { int IOffs = (Y * W + X) * 16; byte[] Tile = BCnDecodeTile(data, IOffs + 8, false); byte[] Alpha = new byte[8]; Alpha[0] = data[IOffs + 0]; Alpha[1] = data[IOffs + 1]; CalculateBC3Alpha(Alpha); int AlphaLow = Get32(data, IOffs + 2); int AlphaHigh = Get16(data, IOffs + 6); ulong AlphaCh = (uint)AlphaLow | (ulong)AlphaHigh << 32; int TOffset = 0; for (int TY = 0; TY < 4; TY++) { for (int TX = 0; TX < 4; TX++) { int OOffset = (X * 4 + TX + (Y * 4 + TY) * W * 4) * 4; byte AlphaPx = Alpha[(AlphaCh >> (TY * 12 + TX * 3)) & 7]; Output[OOffset + 0] = Tile[TOffset + 0]; Output[OOffset + 1] = Tile[TOffset + 1]; Output[OOffset + 2] = Tile[TOffset + 2]; Output[OOffset + 3] = AlphaPx; TOffset += 4; } } } } return BitmapExtension.GetBitmap(Output, W * 4, H * 4); } public static Bitmap DecompressBC4(Byte[] data, int width, int height, bool IsSNORM) { int W = (width + 3) / 4; int H = (height + 3) / 4; byte[] Output = new byte[W * H * 64]; for (int Y = 0; Y < H; Y++) { for (int X = 0; X < W; X++) { int IOffs = (Y * W + X) * 8; byte[] Red = new byte[8]; Red[0] = data[IOffs + 0]; Red[1] = data[IOffs + 1]; CalculateBC3Alpha(Red); int RedLow = Get32(data, IOffs + 2); int RedHigh = Get16(data, IOffs + 6); ulong RedCh = (uint)RedLow | (ulong)RedHigh << 32; int TOffset = 0; int TW = Math.Min(width - X * 4, 4); int TH = Math.Min(height - Y * 4, 4); for (int TY = 0; TY < 4; TY++) { for (int TX = 0; TX < 4; TX++) { int OOffset = (X * 4 + TX + (Y * 4 + TY) * W * 4) * 4; byte RedPx = Red[(RedCh >> (TY * 12 + TX * 3)) & 7]; Output[OOffset + 0] = RedPx; Output[OOffset + 1] = RedPx; Output[OOffset + 2] = RedPx; Output[OOffset + 3] = 255; TOffset += 4; } } } } return BitmapExtension.GetBitmap(Output, W * 4, H * 4); } public static byte[] DecompressBC5(Byte[] data, int width, int height, bool IsSNORM, bool IsByteArray) { int W = (width + 3) / 4; int H = (height + 3) / 4; byte[] Output = new byte[width * height * 4]; for (int Y = 0; Y < H; Y++) { for (int X = 0; X < W; X++) { int IOffs = (Y * W + X) * 16; byte[] Red = new byte[8]; byte[] Green = new byte[8]; Red[0] = data[IOffs + 0]; Red[1] = data[IOffs + 1]; Green[0] = data[IOffs + 8]; Green[1] = data[IOffs + 9]; if (IsSNORM == true) { CalculateBC3AlphaS(Red); CalculateBC3AlphaS(Green); } else { CalculateBC3Alpha(Red); CalculateBC3Alpha(Green); } int RedLow = Get32(data, IOffs + 2); int RedHigh = Get16(data, IOffs + 6); int GreenLow = Get32(data, IOffs + 10); int GreenHigh = Get16(data, IOffs + 14); ulong RedCh = (uint)RedLow | (ulong)RedHigh << 32; ulong GreenCh = (uint)GreenLow | (ulong)GreenHigh << 32; int TW = Math.Min(width - X * 4, 4); int TH = Math.Min(height - Y * 4, 4); if (IsSNORM == true) { for (int TY = 0; TY < TH; TY++) { for (int TX = 0; TX < TW; TX++) { int Shift = TY * 12 + TX * 3; int OOffset = ((Y * 4 + TY) * width + (X * 4 + TX)) * 4; byte RedPx = Red[(RedCh >> Shift) & 7]; byte GreenPx = Green[(GreenCh >> Shift) & 7]; if (IsSNORM == true) { RedPx += 0x80; GreenPx += 0x80; } float NX = (RedPx / 255f) * 2 - 1; float NY = (GreenPx / 255f) * 2 - 1; float NZ = (float)Math.Sqrt(1 - (NX * NX + NY * NY)); Output[OOffset + 0] = Clamp((NX + 1) * 0.5f); Output[OOffset + 1] = Clamp((NY + 1) * 0.5f); Output[OOffset + 2] = Clamp((NZ + 1) * 0.5f); Output[OOffset + 3] = 0xff; } } } else { for (int TY = 0; TY < TH; TY++) { for (int TX = 0; TX < TW; TX++) { int Shift = TY * 12 + TX * 3; int OOffset = ((Y * 4 + TY) * width + (X * 4 + TX)) * 4; byte RedPx = Red[(RedCh >> Shift) & 7]; byte GreenPx = Green[(GreenCh >> Shift) & 7]; Output[OOffset + 0] = RedPx; Output[OOffset + 1] = GreenPx; Output[OOffset + 2] = 255; Output[OOffset + 3] = 255; } } } } } return Output; } public static Bitmap DecompressBC5(Byte[] data, int width, int height, bool IsSNORM) { int W = (width + 3) / 4; int H = (height + 3) / 4; byte[] Output = new byte[W * H * 64]; for (int Y = 0; Y < H; Y++) { for (int X = 0; X < W; X++) { int IOffs = (Y * W + X) * 16; byte[] Red = new byte[8]; byte[] Green = new byte[8]; Red[0] = data[IOffs + 0]; Red[1] = data[IOffs + 1]; Green[0] = data[IOffs + 8]; Green[1] = data[IOffs + 9]; if (IsSNORM == true) { CalculateBC3AlphaS(Red); CalculateBC3AlphaS(Green); } else { CalculateBC3Alpha(Red); CalculateBC3Alpha(Green); } int RedLow = Get32(data, IOffs + 2); int RedHigh = Get16(data, IOffs + 6); int GreenLow = Get32(data, IOffs + 10); int GreenHigh = Get16(data, IOffs + 14); ulong RedCh = (uint)RedLow | (ulong)RedHigh << 32; ulong GreenCh = (uint)GreenLow | (ulong)GreenHigh << 32; int TW = Math.Min(width - X * 4, 4); int TH = Math.Min(height - Y * 4, 4); if (IsSNORM == true) { for (int TY = 0; TY < TH; TY++) { for (int TX = 0; TX < TW; TX++) { int Shift = TY * 12 + TX * 3; int OOffset = ((Y * 4 + TY) * width + (X * 4 + TX)) * 4; byte RedPx = Red[(RedCh >> Shift) & 7]; byte GreenPx = Green[(GreenCh >> Shift) & 7]; if (IsSNORM == true) { RedPx += 0x80; GreenPx += 0x80; } float NX = (RedPx / 255f) * 2 - 1; float NY = (GreenPx / 255f) * 2 - 1; float NZ = (float)Math.Sqrt(1 - (NX * NX + NY * NY)); Output[OOffset + 0] = Clamp((NZ + 1) * 0.5f); Output[OOffset + 1] = Clamp((NY + 1) * 0.5f); Output[OOffset + 2] = Clamp((NX + 1) * 0.5f); Output[OOffset + 3] = 0xff; } } } else { for (int TY = 0; TY < TH; TY++) { for (int TX = 0; TX < TW; TX++) { int Shift = TY * 12 + TX * 3; int OOffset = ((Y * 4 + TY) * width + (X * 4 + TX)) * 4; byte RedPx = Red[(RedCh >> Shift) & 7]; byte GreenPx = Green[(GreenCh >> Shift) & 7]; Output[OOffset + 0] = 255; Output[OOffset + 1] = GreenPx; Output[OOffset + 2] = RedPx; Output[OOffset + 3] = 255; } } } } } return BitmapExtension.GetBitmap(Output, W * 4, H * 4); } public static unsafe byte[] CompressBlock(Byte[] data, int width, int height, DDS.DXGI_FORMAT format, float AlphaRef = 0.5f, STCompressionMode CompressionMode = STCompressionMode.Normal) { long inputRowPitch = width * 4; long inputSlicePitch = width * height * 4; if (data.Length == inputSlicePitch) { byte* buf; buf = (byte*)Marshal.AllocHGlobal((int)inputSlicePitch); Marshal.Copy(data, 0, (IntPtr)buf, (int)inputSlicePitch); DirectXTexNet.Image inputImage = new DirectXTexNet.Image( width, height, DXGI_FORMAT.R8G8B8A8_UNORM, inputRowPitch, inputSlicePitch, (IntPtr)buf, null); TexMetadata texMetadata = new TexMetadata(width, height, 1, 1, 1, 0, 0, DXGI_FORMAT.R8G8B8A8_UNORM, TEX_DIMENSION.TEXTURE2D); ScratchImage scratchImage = TexHelper.Instance.InitializeTemporary( new DirectXTexNet.Image[] { inputImage }, texMetadata, null); var compFlags = TEX_COMPRESS_FLAGS.DEFAULT; // compFlags |= TEX_COMPRESS_FLAGS.PARALLEL; if (format == DDS.DXGI_FORMAT.DXGI_FORMAT_BC7_UNORM || format == DDS.DXGI_FORMAT.DXGI_FORMAT_BC7_UNORM_SRGB || format == DDS.DXGI_FORMAT.DXGI_FORMAT_BC7_TYPELESS) { if (CompressionMode == STCompressionMode.Fast) compFlags |= TEX_COMPRESS_FLAGS.BC7_QUICK; } if (format == DDS.DXGI_FORMAT.DXGI_FORMAT_BC1_UNORM_SRGB || format == DDS.DXGI_FORMAT.DXGI_FORMAT_BC1_UNORM_SRGB || format == DDS.DXGI_FORMAT.DXGI_FORMAT_BC2_UNORM_SRGB || format == DDS.DXGI_FORMAT.DXGI_FORMAT_BC3_UNORM_SRGB || format == DDS.DXGI_FORMAT.DXGI_FORMAT_BC7_UNORM_SRGB) { compFlags |= TEX_COMPRESS_FLAGS.SRGB; } using (var comp = scratchImage.Compress((DXGI_FORMAT)format, compFlags, 0.5f)) { long outRowPitch; long outSlicePitch; TexHelper.Instance.ComputePitch((DXGI_FORMAT)format, width, height, out outRowPitch, out outSlicePitch, CP_FLAGS.NONE); byte[] result = new byte[outSlicePitch]; Marshal.Copy(comp.GetImage(0).Pixels, result, 0, result.Length); inputImage = null; scratchImage.Dispose(); return result; } } return null; } public static unsafe byte[] DecompressBlock(Byte[] data, int width, int height, DDS.DXGI_FORMAT format) { Console.WriteLine(format); Console.WriteLine(data.Length); Console.WriteLine(width); Console.WriteLine(height); long inputRowPitch; long inputSlicePitch; TexHelper.Instance.ComputePitch((DXGI_FORMAT)format, width, height, out inputRowPitch, out inputSlicePitch, CP_FLAGS.NONE); DXGI_FORMAT FormatDecompressed; if (format.ToString().Contains("SRGB")) FormatDecompressed = DXGI_FORMAT.R8G8B8A8_UNORM_SRGB; else FormatDecompressed = DXGI_FORMAT.R8G8B8A8_UNORM; if (data.Length == inputSlicePitch) { byte* buf; buf = (byte*)Marshal.AllocHGlobal((int)inputSlicePitch); Marshal.Copy(data, 0, (IntPtr)buf, (int)inputSlicePitch); DirectXTexNet.Image inputImage = new DirectXTexNet.Image( width, height, (DXGI_FORMAT)format, inputRowPitch, inputSlicePitch, (IntPtr)buf, null); TexMetadata texMetadata = new TexMetadata(width, height, 1, 1, 1, 0, 0, (DXGI_FORMAT)format, TEX_DIMENSION.TEXTURE2D); ScratchImage scratchImage = TexHelper.Instance.InitializeTemporary( new DirectXTexNet.Image[] { inputImage }, texMetadata, null); using (var decomp = scratchImage.Decompress(0, FormatDecompressed)) { byte[] result = new byte[4 * width * height]; Marshal.Copy(decomp.GetImage(0).Pixels, result, 0, result.Length); inputImage = null; scratchImage.Dispose(); return result; } } return null; } public static unsafe byte[] DecodePixelBlock(Byte[] data, int width, int height, DDS.DXGI_FORMAT format, float AlphaRef = 0.5f) { if (format == DDS.DXGI_FORMAT.DXGI_FORMAT_R8G8B8A8_UNORM) { byte[] result = new byte[data.Length]; Array.Copy(data, result, data.Length); return result; } return Convert(data, width, height, (DXGI_FORMAT)format, DXGI_FORMAT.R8G8B8A8_UNORM); } public static unsafe byte[] EncodePixelBlock(Byte[] data, int width, int height, DDS.DXGI_FORMAT format, float AlphaRef = 0.5f) { if (format == DDS.DXGI_FORMAT.DXGI_FORMAT_R8G8B8A8_UNORM || format == DDS.DXGI_FORMAT.DXGI_FORMAT_R8G8B8A8_UNORM_SRGB) return data; return Convert(data, width, height, DXGI_FORMAT.R8G8B8A8_UNORM, (DXGI_FORMAT)format); } public static unsafe byte[] Convert(Byte[] data, int width, int height, DXGI_FORMAT inputFormat, DXGI_FORMAT outputFormat) { long inputRowPitch; long inputSlicePitch; TexHelper.Instance.ComputePitch(inputFormat, width, height, out inputRowPitch, out inputSlicePitch, CP_FLAGS.NONE); if (data.Length == inputSlicePitch) { byte* buf; buf = (byte*)Marshal.AllocHGlobal((int)inputSlicePitch); Marshal.Copy(data, 0, (IntPtr)buf, (int)inputSlicePitch); DirectXTexNet.Image inputImage = new DirectXTexNet.Image( width, height, inputFormat, inputRowPitch, inputSlicePitch, (IntPtr)buf, null); TexMetadata texMetadata = new TexMetadata(width, height, 1, 1, 1, 0, 0, inputFormat, TEX_DIMENSION.TEXTURE2D); ScratchImage scratchImage = TexHelper.Instance.InitializeTemporary( new DirectXTexNet.Image[] { inputImage }, texMetadata, null); var convFlags = TEX_FILTER_FLAGS.DEFAULT; if (inputFormat == DXGI_FORMAT.B8G8R8A8_UNORM_SRGB || inputFormat == DXGI_FORMAT.B8G8R8X8_UNORM_SRGB || inputFormat == DXGI_FORMAT.R8G8B8A8_UNORM_SRGB) { convFlags |= TEX_FILTER_FLAGS.SRGB; } using (var decomp = scratchImage.Convert(0, outputFormat, convFlags, 0.5f)) { long outRowPitch; long outSlicePitch; TexHelper.Instance.ComputePitch(outputFormat, width, height, out outRowPitch, out outSlicePitch, CP_FLAGS.NONE); byte[] result = new byte[outSlicePitch]; Marshal.Copy(decomp.GetImage(0).Pixels, result, 0, result.Length); inputImage = null; scratchImage.Dispose(); return result; } } return null; } /* public static byte[] CompressBlock(Byte[] data, int width, int height, DDS.DXGI_FORMAT format, float AlphaRef) { return DirectXTex.ImageCompressor.Compress(data, width, height, (int)format, AlphaRef); }*/ public static byte[] DecompressCompLibBlock(Byte[] data, int width, int height, DDS.DXGI_FORMAT format) { byte[] output = null; switch (format) { case DDS.DXGI_FORMAT.DXGI_FORMAT_BC1_UNORM: case DDS.DXGI_FORMAT.DXGI_FORMAT_BC1_UNORM_SRGB: output = CSharpImageLibrary.DDS.Dxt.DecompressDxt1(data, (int)width, (int)height); break; case DDS.DXGI_FORMAT.DXGI_FORMAT_BC3_UNORM: case DDS.DXGI_FORMAT.DXGI_FORMAT_BC3_UNORM_SRGB: output = CSharpImageLibrary.DDS.Dxt.DecompressDxt5(data, (int)width, (int)height); break; case DDS.DXGI_FORMAT.DXGI_FORMAT_BC4_UNORM: case DDS.DXGI_FORMAT.DXGI_FORMAT_BC4_SNORM: output = CSharpImageLibrary.DDS.Dxt.DecompressDxt4(data, (int)width, (int)height); break; case DDS.DXGI_FORMAT.DXGI_FORMAT_BC5_UNORM: case DDS.DXGI_FORMAT.DXGI_FORMAT_BC5_SNORM: output = CSharpImageLibrary.DDS.Dxt.DecompressDxt4(data, (int)width, (int)height); break; case DDS.DXGI_FORMAT.DXGI_FORMAT_BC7_UNORM: case DDS.DXGI_FORMAT.DXGI_FORMAT_BC7_UNORM_SRGB: output = CSharpImageLibrary.DDS.Dxt.DecompressBc7(data, (int)width, (int)height); break; default: output = DecompressBlock(data, width, height, format); break; } return output; } public static Bitmap DecompressCompLibBlock(Byte[] data, int width, int height, DDS.DXGI_FORMAT format, bool GetBitmap) { return BitmapExtension.GetBitmap(DecompressBlock(data, width, height, format), (int)width, (int)height); } public static int Get16(byte[] Data, int Address) { return Data[Address + 0] << 0 | Data[Address + 1] << 8; } public static int Get32(byte[] Data, int Address) { return Data[Address + 0] << 0 | Data[Address + 1] << 8 | Data[Address + 2] << 16 | Data[Address + 3] << 24; } private static byte Clamp(float Value) { if (Value > 1) { return 0xff; } else if (Value < 0) { return 0; } else { return (byte)(Value * 0xff); } } private static void CalculateBC3Alpha(byte[] Alpha) { for (int i = 2; i < 8; i++) { if (Alpha[0] > Alpha[1]) { Alpha[i] = (byte)(((8 - i) * Alpha[0] + (i - 1) * Alpha[1]) / 7); } else if (i < 6) { Alpha[i] = (byte)(((6 - i) * Alpha[0] + (i - 1) * Alpha[1]) / 7); } else if (i == 6) { Alpha[i] = 0; } else /* i == 7 */ { Alpha[i] = 0xff; } } } private static void CalculateBC3AlphaS(byte[] Alpha) { for (int i = 2; i < 8; i++) { if ((sbyte)Alpha[0] > (sbyte)Alpha[1]) { Alpha[i] = (byte)(((8 - i) * (sbyte)Alpha[0] + (i - 1) * (sbyte)Alpha[1]) / 7); } else if (i < 6) { Alpha[i] = (byte)(((6 - i) * (sbyte)Alpha[0] + (i - 1) * (sbyte)Alpha[1]) / 7); } else if (i == 6) { Alpha[i] = 0x80; } else /* i == 7 */ { Alpha[i] = 0x7f; } } } } }