public static byte[] DecodeBC4(NsGpuTexture Tex, int Offset) { int W = (Tex.Width + 3) / 4; int H = (Tex.Height + 3) / 4; byte[] Output = new byte[W * H * 64]; SwizzleAddr Swizzle = new SwizzleAddr(W, H, 8); for (int Y = 0; Y < H; Y++) { for (int X = 0; X < W; X++) { int IOffs = Swizzle.GetSwizzledAddress64(X, Y) * 8; byte[] Red = new byte[8]; Red[0] = Tex.Data[IOffs + 0]; Red[1] = Tex.Data[IOffs + 1]; CalculateBC3Alpha(Red); int RedLow = Get32(Tex.Data, IOffs + 2); int RedHigh = Get16(Tex.Data, IOffs + 6); ulong RedCh = (uint)RedLow | (ulong)RedHigh << 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 RedPx = Red[(RedCh >> (TY * 12 + TX * 3)) & 7]; Output[OOffset + 0] = RedPx; Output[OOffset + 1] = RedPx; Output[OOffset + 2] = RedPx; Output[OOffset + 3] = 0xff; TOffset += 4; } } } } return(Output); }
public static byte[] DecodeBC1(NsGpuTexture Tex, int Offset) { int W = (Tex.Width + 3) / 4; int H = (Tex.Height + 3) / 4; byte[] Output = new byte[W * H * 64]; SwizzleAddr Swizzle = new SwizzleAddr(W, H, 8); for (int Y = 0; Y < H; Y++) { for (int X = 0; X < W; X++) { int IOffs = Offset + Swizzle.GetSwizzledAddress64(X, Y) * 8; byte[] Tile = BCnDecodeTile(Tex.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(Output); }