forked from Mirror/Ryujinx
468 lines
No EOL
15 KiB
C#
468 lines
No EOL
15 KiB
C#
using System;
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using System.Drawing;
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namespace Ryujinx.Graphics.Gal.Texture
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{
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static class BCn
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{
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public static byte[] DecodeBC1(GalTexture Texture, int Offset)
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{
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int W = (Texture.Width + 3) / 4;
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int H = (Texture.Height + 3) / 4;
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byte[] Output = new byte[W * H * 64];
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SwizzleAddr Swizzle = new SwizzleAddr(W, H, 8);
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for (int Y = 0; Y < H; Y++)
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{
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for (int X = 0; X < W; X++)
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{
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int IOffs = Offset + Swizzle.GetSwizzledAddress64(X, Y) * 8;
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byte[] Tile = BCnDecodeTile(Texture.Data, IOffs, true);
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int TOffset = 0;
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for (int TY = 0; TY < 4; TY++)
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{
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for (int TX = 0; TX < 4; TX++)
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{
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int OOffset = (X * 4 + TX + (Y * 4 + TY) * W * 4) * 4;
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Output[OOffset + 0] = Tile[TOffset + 0];
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Output[OOffset + 1] = Tile[TOffset + 1];
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Output[OOffset + 2] = Tile[TOffset + 2];
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Output[OOffset + 3] = Tile[TOffset + 3];
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TOffset += 4;
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}
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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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public static byte[] DecodeBC2(GalTexture Texture, int Offset)
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{
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int W = (Texture.Width + 3) / 4;
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int H = (Texture.Height + 3) / 4;
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byte[] Output = new byte[W * H * 64];
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SwizzleAddr Swizzle = new SwizzleAddr(W, H, 4);
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for (int Y = 0; Y < H; Y++)
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{
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for (int X = 0; X < W; X++)
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{
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int IOffs = Offset + Swizzle.GetSwizzledAddress128(X, Y) * 16;
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byte[] Tile = BCnDecodeTile(Texture.Data, IOffs + 8, false);
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int AlphaLow = Get32(Texture.Data, IOffs + 0);
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int AlphaHigh = Get32(Texture.Data, IOffs + 4);
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ulong AlphaCh = (uint)AlphaLow | (ulong)AlphaHigh << 32;
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int TOffset = 0;
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for (int TY = 0; TY < 4; TY++)
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{
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for (int TX = 0; TX < 4; TX++)
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{
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ulong Alpha = (AlphaCh >> (TY * 16 + TX * 4)) & 0xf;
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int OOffset = (X * 4 + TX + (Y * 4 + TY) * W * 4) * 4;
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Output[OOffset + 0] = Tile[TOffset + 0];
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Output[OOffset + 1] = Tile[TOffset + 1];
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Output[OOffset + 2] = Tile[TOffset + 2];
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Output[OOffset + 3] = (byte)(Alpha | (Alpha << 4));
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TOffset += 4;
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}
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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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public static byte[] DecodeBC3(GalTexture Texture, int Offset)
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{
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int W = (Texture.Width + 3) / 4;
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int H = (Texture.Height + 3) / 4;
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byte[] Output = new byte[W * H * 64];
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SwizzleAddr Swizzle = new SwizzleAddr(W, H, 4);
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for (int Y = 0; Y < H; Y++)
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{
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for (int X = 0; X < W; X++)
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{
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int IOffs = Offset + Swizzle.GetSwizzledAddress128(X, Y) * 16;
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byte[] Tile = BCnDecodeTile(Texture.Data, IOffs + 8, false);
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byte[] Alpha = new byte[8];
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Alpha[0] = Texture.Data[IOffs + 0];
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Alpha[1] = Texture.Data[IOffs + 1];
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CalculateBC3Alpha(Alpha);
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int AlphaLow = Get32(Texture.Data, IOffs + 2);
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int AlphaHigh = Get16(Texture.Data, IOffs + 6);
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ulong AlphaCh = (uint)AlphaLow | (ulong)AlphaHigh << 32;
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int TOffset = 0;
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for (int TY = 0; TY < 4; TY++)
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{
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for (int TX = 0; TX < 4; TX++)
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{
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int OOffset = (X * 4 + TX + (Y * 4 + TY) * W * 4) * 4;
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byte AlphaPx = Alpha[(AlphaCh >> (TY * 12 + TX * 3)) & 7];
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Output[OOffset + 0] = Tile[TOffset + 0];
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Output[OOffset + 1] = Tile[TOffset + 1];
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Output[OOffset + 2] = Tile[TOffset + 2];
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Output[OOffset + 3] = AlphaPx;
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TOffset += 4;
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}
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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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public static byte[] DecodeBC4(GalTexture Texture, int Offset)
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{
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int W = (Texture.Width + 3) / 4;
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int H = (Texture.Height + 3) / 4;
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byte[] Output = new byte[W * H * 64];
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SwizzleAddr Swizzle = new SwizzleAddr(W, H, 8);
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for (int Y = 0; Y < H; Y++)
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{
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for (int X = 0; X < W; X++)
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{
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int IOffs = Swizzle.GetSwizzledAddress64(X, Y) * 8;
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byte[] Red = new byte[8];
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Red[0] = Texture.Data[IOffs + 0];
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Red[1] = Texture.Data[IOffs + 1];
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CalculateBC3Alpha(Red);
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int RedLow = Get32(Texture.Data, IOffs + 2);
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int RedHigh = Get16(Texture.Data, IOffs + 6);
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ulong RedCh = (uint)RedLow | (ulong)RedHigh << 32;
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int TOffset = 0;
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for (int TY = 0; TY < 4; TY++)
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{
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for (int TX = 0; TX < 4; TX++)
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{
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int OOffset = (X * 4 + TX + (Y * 4 + TY) * W * 4) * 4;
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byte RedPx = Red[(RedCh >> (TY * 12 + TX * 3)) & 7];
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Output[OOffset + 0] = RedPx;
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Output[OOffset + 1] = RedPx;
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Output[OOffset + 2] = RedPx;
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Output[OOffset + 3] = 0xff;
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TOffset += 4;
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}
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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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public static byte[] DecodeBC5(GalTexture Texture, int Offset, bool SNorm)
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{
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int W = (Texture.Width + 3) / 4;
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int H = (Texture.Height + 3) / 4;
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byte[] Output = new byte[W * H * 64];
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SwizzleAddr Swizzle = new SwizzleAddr(W, H, 4);
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for (int Y = 0; Y < H; Y++)
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{
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for (int X = 0; X < W; X++)
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{
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int IOffs = Swizzle.GetSwizzledAddress128(X, Y) * 16;
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byte[] Red = new byte[8];
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byte[] Green = new byte[8];
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Red[0] = Texture.Data[IOffs + 0];
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Red[1] = Texture.Data[IOffs + 1];
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Green[0] = Texture.Data[IOffs + 8];
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Green[1] = Texture.Data[IOffs + 9];
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if (SNorm)
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{
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CalculateBC3AlphaS(Red);
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CalculateBC3AlphaS(Green);
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}
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else
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{
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CalculateBC3Alpha(Red);
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CalculateBC3Alpha(Green);
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}
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int RedLow = Get32(Texture.Data, IOffs + 2);
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int RedHigh = Get16(Texture.Data, IOffs + 6);
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int GreenLow = Get32(Texture.Data, IOffs + 10);
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int GreenHigh = Get16(Texture.Data, IOffs + 14);
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ulong RedCh = (uint)RedLow | (ulong)RedHigh << 32;
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ulong GreenCh = (uint)GreenLow | (ulong)GreenHigh << 32;
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int TOffset = 0;
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if (SNorm)
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{
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for (int TY = 0; TY < 4; TY++)
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{
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for (int TX = 0; TX < 4; TX++)
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{
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int Shift = TY * 12 + TX * 3;
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int OOffset = (X * 4 + TX + (Y * 4 + TY) * W * 4) * 4;
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byte RedPx = Red [(RedCh >> Shift) & 7];
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byte GreenPx = Green[(GreenCh >> Shift) & 7];
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RedPx += 0x80;
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GreenPx += 0x80;
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float NX = (RedPx / 255f) * 2 - 1;
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float NY = (GreenPx / 255f) * 2 - 1;
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float NZ = (float)Math.Sqrt(1 - (NX * NX + NY * NY));
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Output[OOffset + 0] = Clamp((NZ + 1) * 0.5f);
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Output[OOffset + 1] = Clamp((NY + 1) * 0.5f);
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Output[OOffset + 2] = Clamp((NX + 1) * 0.5f);
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Output[OOffset + 3] = 0xff;
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TOffset += 4;
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}
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}
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}
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else
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{
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for (int TY = 0; TY < 4; TY++)
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{
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for (int TX = 0; TX < 4; TX++)
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{
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int Shift = TY * 12 + TX * 3;
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int OOffset = (X * 4 + TX + (Y * 4 + TY) * W * 4) * 4;
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byte RedPx = Red [(RedCh >> Shift) & 7];
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byte GreenPx = Green[(GreenCh >> Shift) & 7];
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Output[OOffset + 0] = RedPx;
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Output[OOffset + 1] = RedPx;
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Output[OOffset + 2] = RedPx;
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Output[OOffset + 3] = GreenPx;
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TOffset += 4;
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}
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}
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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 byte Clamp(float Value)
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{
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if (Value > 1)
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{
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return 0xff;
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}
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else if (Value < 0)
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{
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return 0;
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}
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else
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{
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return (byte)(Value * 0xff);
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}
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}
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private static void CalculateBC3Alpha(byte[] Alpha)
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{
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for (int i = 2; i < 8; i++)
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{
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if (Alpha[0] > Alpha[1])
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{
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Alpha[i] = (byte)(((8 - i) * Alpha[0] + (i - 1) * Alpha[1]) / 7);
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}
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else if (i < 6)
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{
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Alpha[i] = (byte)(((6 - i) * Alpha[0] + (i - 1) * Alpha[1]) / 7);
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}
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else if (i == 6)
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{
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Alpha[i] = 0;
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}
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else /* i == 7 */
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{
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Alpha[i] = 0xff;
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}
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}
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}
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private static void CalculateBC3AlphaS(byte[] Alpha)
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{
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for (int i = 2; i < 8; i++)
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{
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if ((sbyte)Alpha[0] > (sbyte)Alpha[1])
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{
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Alpha[i] = (byte)(((8 - i) * (sbyte)Alpha[0] + (i - 1) * (sbyte)Alpha[1]) / 7);
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}
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else if (i < 6)
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{
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Alpha[i] = (byte)(((6 - i) * (sbyte)Alpha[0] + (i - 1) * (sbyte)Alpha[1]) / 7);
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}
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else if (i == 6)
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{
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Alpha[i] = 0x80;
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}
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else /* i == 7 */
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{
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Alpha[i] = 0x7f;
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}
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}
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}
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private static byte[] BCnDecodeTile(
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byte[] Input,
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int Offset,
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bool IsBC1)
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{
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Color[] CLUT = new Color[4];
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int c0 = Get16(Input, Offset + 0);
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int c1 = Get16(Input, Offset + 2);
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CLUT[0] = DecodeRGB565(c0);
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CLUT[1] = DecodeRGB565(c1);
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CLUT[2] = CalculateCLUT2(CLUT[0], CLUT[1], c0, c1, IsBC1);
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CLUT[3] = CalculateCLUT3(CLUT[0], CLUT[1], c0, c1, IsBC1);
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int Indices = Get32(Input, Offset + 4);
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int IdxShift = 0;
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byte[] Output = new byte[4 * 4 * 4];
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int OOffset = 0;
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for (int TY = 0; TY < 4; TY++)
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{
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for (int TX = 0; TX < 4; TX++)
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{
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int Idx = (Indices >> IdxShift) & 3;
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IdxShift += 2;
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Color Pixel = CLUT[Idx];
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Output[OOffset + 0] = Pixel.R;
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Output[OOffset + 1] = Pixel.G;
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Output[OOffset + 2] = Pixel.B;
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Output[OOffset + 3] = Pixel.A;
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OOffset += 4;
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}
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}
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return Output;
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}
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private static Color CalculateCLUT2(Color C0, Color C1, int c0, int c1, bool IsBC1)
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{
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if (c0 > c1 || !IsBC1)
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{
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return Color.FromArgb(
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(2 * C0.R + C1.R) / 3,
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(2 * C0.G + C1.G) / 3,
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(2 * C0.B + C1.B) / 3);
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}
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else
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{
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return Color.FromArgb(
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(C0.R + C1.R) / 2,
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(C0.G + C1.G) / 2,
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(C0.B + C1.B) / 2);
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}
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}
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private static Color CalculateCLUT3(Color C0, Color C1, int c0, int c1, bool IsBC1)
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{
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if (c0 > c1 || !IsBC1)
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{
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return
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Color.FromArgb(
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(2 * C1.R + C0.R) / 3,
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(2 * C1.G + C0.G) / 3,
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(2 * C1.B + C0.B) / 3);
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}
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return Color.Transparent;
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}
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private static Color DecodeRGB565(int Value)
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{
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int B = ((Value >> 0) & 0x1f) << 3;
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int G = ((Value >> 5) & 0x3f) << 2;
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int R = ((Value >> 11) & 0x1f) << 3;
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return Color.FromArgb(
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R | (R >> 5),
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G | (G >> 6),
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B | (B >> 5));
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}
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private static int Get16(byte[] Data, int Address)
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{
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return
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Data[Address + 0] << 0 |
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Data[Address + 1] << 8;
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}
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private static int Get32(byte[] Data, int Address)
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{
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return
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Data[Address + 0] << 0 |
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Data[Address + 1] << 8 |
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Data[Address + 2] << 16 |
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Data[Address + 3] << 24;
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}
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}
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} |