248 lines
10 KiB
C#
248 lines
10 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace Switch_Toolbox.Library
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{
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public class CTR_3DS
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{
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//From https://github.com/gdkchan/SPICA/blob/42c4181e198b0fd34f0a567345ee7e75b54cb58b/SPICA/PICA/Converters/TextureConverter.cs
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public enum PICASurfaceFormat
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{
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RGBA8,
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RGB8,
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RGBA5551,
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RGB565,
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RGBA4,
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LA8,
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HiLo8,
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L8,
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A8,
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LA4,
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L4,
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A4,
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ETC1,
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ETC1A4
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}
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public static TEX_FORMAT ConvertPICAToGenericFormat(PICASurfaceFormat format)
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{
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switch (format)
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{
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case PICASurfaceFormat.RGB565: return TEX_FORMAT.B5G6R5_UNORM;
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case PICASurfaceFormat.RGB8: return TEX_FORMAT.R8G8_UNORM;
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case PICASurfaceFormat.RGBA5551: return TEX_FORMAT.B5G5R5A1_UNORM;
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case PICASurfaceFormat.RGBA4: return TEX_FORMAT.B4G4R4A4_UNORM;
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case PICASurfaceFormat.LA8: return TEX_FORMAT.LA8;
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case PICASurfaceFormat.HiLo8: return TEX_FORMAT.HIL08;
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case PICASurfaceFormat.L8: return TEX_FORMAT.L8;
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case PICASurfaceFormat.A8: return TEX_FORMAT.A8_UNORM;
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case PICASurfaceFormat.LA4: return TEX_FORMAT.LA4;
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case PICASurfaceFormat.L4: return TEX_FORMAT.L4;
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case PICASurfaceFormat.A4: return TEX_FORMAT.A4;
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case PICASurfaceFormat.ETC1: return TEX_FORMAT.ETC1_UNORM;
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case PICASurfaceFormat.ETC1A4: return TEX_FORMAT.ETC1_A4;
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default:
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throw new NotImplementedException("Unsupported format! " + format);
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}
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}
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public static PICASurfaceFormat ConvertToPICAFormat(TEX_FORMAT GenericFormat)
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{
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switch (GenericFormat)
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{
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case TEX_FORMAT.B5G6R5_UNORM: return PICASurfaceFormat.RGB565;
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case TEX_FORMAT.R8G8_UNORM: return PICASurfaceFormat.RGB8;
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case TEX_FORMAT.B5G5R5A1_UNORM: return PICASurfaceFormat.RGBA5551;
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case TEX_FORMAT.B4G4R4A4_UNORM: return PICASurfaceFormat.RGBA4;
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case TEX_FORMAT.LA8: return PICASurfaceFormat.LA8;
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case TEX_FORMAT.HIL08: return PICASurfaceFormat.HiLo8;
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case TEX_FORMAT.L8: return PICASurfaceFormat.L8;
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case TEX_FORMAT.A8_UNORM: return PICASurfaceFormat.A8;
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case TEX_FORMAT.LA4: return PICASurfaceFormat.LA4;
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case TEX_FORMAT.A4: return PICASurfaceFormat.A4;
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case TEX_FORMAT.ETC1_UNORM: return PICASurfaceFormat.ETC1;
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case TEX_FORMAT.ETC1_A4: return PICASurfaceFormat.ETC1A4;
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default:
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throw new NotImplementedException("Unsupported format! " + GenericFormat);
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}
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}
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private static int[] FmtBPP = new int[] { 32, 24, 16, 16, 16, 16, 16, 8, 8, 8, 4, 4, 4, 8 };
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public static int[] SwizzleLUT =
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{
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0, 1, 8, 9, 2, 3, 10, 11,
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16, 17, 24, 25, 18, 19, 26, 27,
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4, 5, 12, 13, 6, 7, 14, 15,
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20, 21, 28, 29, 22, 23, 30, 31,
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32, 33, 40, 41, 34, 35, 42, 43,
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48, 49, 56, 57, 50, 51, 58, 59,
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36, 37, 44, 45, 38, 39, 46, 47,
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52, 53, 60, 61, 54, 55, 62, 63
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};
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public static byte[] DecodeBlock(byte[] Input, int Width, int Height, TEX_FORMAT Format)
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{
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if (Format == TEX_FORMAT.ETC1_UNORM || Format == TEX_FORMAT.ETC1_A4)
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return ETC1.ETC1Decompress(Input, Width, Height, Format == TEX_FORMAT.ETC1_A4);
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byte[] Output = new byte[Width * Height * 4];
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int Increment = FmtBPP[(int)ConvertToPICAFormat(Format)] / 8;
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if (Increment == 0) Increment = 1;
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int IOffset = 0;
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for (int TY = 0; TY < Height; TY += 8)
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{
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for (int TX = 0; TX < Width; TX += 8)
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{
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for (int Px = 0; Px < 64; Px++)
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{
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int X = SwizzleLUT[Px] & 7;
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int Y = (SwizzleLUT[Px] - X) >> 3;
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int OOffet = (TX + X + ((Height - 1 - (TY + Y)) * Width)) * 4;
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switch (Format)
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{
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case TEX_FORMAT.R8G8_UNORM:
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Output[OOffet + 0] = Input[IOffset + 3];
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Output[OOffet + 1] = Input[IOffset + 2];
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Output[OOffet + 2] = Input[IOffset + 1];
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Output[OOffet + 3] = Input[IOffset + 0];
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break;
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case TEX_FORMAT.R8G8B8A8_UNORM:
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Output[OOffet + 0] = Input[IOffset + 2];
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Output[OOffet + 1] = Input[IOffset + 1];
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Output[OOffet + 2] = Input[IOffset + 0];
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Output[OOffet + 3] = 0xff;
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break;
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case TEX_FORMAT.B5G5R5A1_UNORM:
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DecodeRGBA5551(Output, OOffet, GetUShort(Input, IOffset));
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break;
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case TEX_FORMAT.B5G6R5_UNORM:
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DecodeRGB565(Output, OOffet, GetUShort(Input, IOffset));
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break;
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case TEX_FORMAT.B4G4R4A4_UNORM:
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DecodeRGBA4(Output, OOffet, GetUShort(Input, IOffset));
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break;
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case TEX_FORMAT.LA8:
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Output[OOffet + 0] = Input[IOffset + 1];
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Output[OOffet + 1] = Input[IOffset + 1];
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Output[OOffet + 2] = Input[IOffset + 1];
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Output[OOffet + 3] = Input[IOffset + 0];
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break;
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case TEX_FORMAT.HIL08:
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Output[OOffet + 0] = Input[IOffset + 1];
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Output[OOffet + 1] = Input[IOffset + 0];
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Output[OOffet + 2] = 0;
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Output[OOffet + 3] = 0xff;
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break;
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case TEX_FORMAT.L8:
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Output[OOffet + 0] = Input[IOffset];
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Output[OOffet + 1] = Input[IOffset];
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Output[OOffet + 2] = Input[IOffset];
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Output[OOffet + 3] = 0xff;
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break;
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case TEX_FORMAT.A8_UNORM:
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Output[OOffet + 0] = 0xff;
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Output[OOffet + 1] = 0xff;
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Output[OOffet + 2] = 0xff;
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Output[OOffet + 3] = Input[IOffset];
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break;
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case TEX_FORMAT.LA4:
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Output[OOffet + 0] = (byte)((Input[IOffset] >> 4) | (Input[IOffset] & 0xf0));
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Output[OOffet + 1] = (byte)((Input[IOffset] >> 4) | (Input[IOffset] & 0xf0));
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Output[OOffet + 2] = (byte)((Input[IOffset] >> 4) | (Input[IOffset] & 0xf0));
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Output[OOffet + 3] = (byte)((Input[IOffset] << 4) | (Input[IOffset] & 0x0f));
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break;
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case TEX_FORMAT.L4:
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int L = (Input[IOffset >> 1] >> ((IOffset & 1) << 2)) & 0xf;
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Output[OOffet + 0] = (byte)((L << 4) | L);
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Output[OOffet + 1] = (byte)((L << 4) | L);
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Output[OOffet + 2] = (byte)((L << 4) | L);
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Output[OOffet + 3] = 0xff;
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break;
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case TEX_FORMAT.A4:
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int A = (Input[IOffset >> 1] >> ((IOffset & 1) << 2)) & 0xf;
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Output[OOffet + 0] = 0xff;
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Output[OOffet + 1] = 0xff;
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Output[OOffet + 2] = 0xff;
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Output[OOffet + 3] = (byte)((A << 4) | A);
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break;
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}
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Output[OOffet + 0] = 0xff;
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Output[OOffet + 1] = 0xff;
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Output[OOffet + 2] = 0xff;
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Output[OOffet + 3] = Input[IOffset];
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IOffset += Increment;
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}
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}
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}
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return Output;
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}
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private static void DecodeRGB565(byte[] Buffer, int Address, ushort Value)
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{
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int R = ((Value >> 0) & 0x1f) << 3;
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int G = ((Value >> 5) & 0x3f) << 2;
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int B = ((Value >> 11) & 0x1f) << 3;
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SetColor(Buffer, Address, 0xff,
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B | (B >> 5),
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G | (G >> 6),
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R | (R >> 5));
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}
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private static void DecodeRGBA4(byte[] Buffer, int Address, ushort Value)
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{
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int R = (Value >> 4) & 0xf;
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int G = (Value >> 8) & 0xf;
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int B = (Value >> 12) & 0xf;
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SetColor(Buffer, Address, (Value & 0xf) | (Value << 4),
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B | (B << 4),
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G | (G << 4),
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R | (R << 4));
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}
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private static void DecodeRGBA5551(byte[] Buffer, int Address, ushort Value)
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{
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int R = ((Value >> 1) & 0x1f) << 3;
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int G = ((Value >> 6) & 0x1f) << 3;
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int B = ((Value >> 11) & 0x1f) << 3;
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SetColor(Buffer, Address, (Value & 1) * 0xff,
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B | (B >> 5),
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G | (G >> 5),
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R | (R >> 5));
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}
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private static void SetColor(byte[] Buffer, int Address, int A, int B, int G, int R)
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{
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Buffer[Address + 0] = (byte)B;
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Buffer[Address + 1] = (byte)G;
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Buffer[Address + 2] = (byte)R;
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Buffer[Address + 3] = (byte)A;
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}
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private static ushort GetUShort(byte[] Buffer, int Address)
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{
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return (ushort)(
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Buffer[Address + 0] << 0 |
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Buffer[Address + 1] << 8);
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}
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}
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}
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