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);
}