public static int[] GetRGBA8Palette(ushort[] rawPalette, ColorFormat colorFormat)
{
if (rawPalette == null)
{
throw new ArgumentNullException($"{nameof(rawPalette)} cannot be null!");
}
var palette = new int[rawPalette.Length];
switch (colorFormat)
{
case ColorFormat.RGB565:
for (var i = 0; i < palette.Length; i++)
{
palette[i] = (int)RGB565.ToARGB8(rawPalette[i]);
}
break;
case ColorFormat.RGB5A1:
for (var i = 0; i < palette.Length; i++)
{
palette[i] = (int)RGB5.ToARGB8(rawPalette[i]);
}
break;
case ColorFormat.RGB5A3:
for (var i = 0; i < palette.Length; i++)
{
palette[i] = (int)RGB5A3.ToARGB8(rawPalette[i]);
}
break;
case ColorFormat.RGBA4:
for (var i = 0; i < palette.Length; i++)
{
palette[i] = (int)RGBA4.ToARGB8(rawPalette[i]);
}
break;
}
return(palette);
}
public BTI(byte[] data)
{
Data = data;
Header = new BTI_Header(data);
Bitmap_Data = new byte[Header.Width * Header.Height * 4];
if (Header.Image_Format == ImageFormat.RGB565 || Header.Image_Format == ImageFormat.RGB5A3)
{
ushort[] PixelData = new ushort[(data.Length - 0x20) / 2];
for (int i = 0, idx = 0x20; i < PixelData.Length; i++, idx += 2)
{
PixelData[i] = (ushort)((data[idx] << 8) | data[idx + 1]);
}
// Decode Block Format
PixelData = SwizzleUtil.Unswizzle(PixelData, Header.Width, Header.Height, 4, 4);
Bitmap_Data = new byte[PixelData.Length * 4];
for (int i = 0, idx = 0; i < PixelData.Length; i++, idx += 4)
{
byte A = 0, R = 0, G = 0, B = 0;
if (Header.Image_Format == ImageFormat.RGB5A3)
{
RGB5A3.ToARGB8(PixelData[i], out A, out R, out G, out B);
}
else
{
A = 0xFF;
RGB565.ToARGB8(PixelData[i], out R, out G, out B);
}
Bitmap_Data[idx] = B;
Bitmap_Data[idx + 1] = G;
Bitmap_Data[idx + 2] = R;
Bitmap_Data[idx + 3] = A;
}
}
else if (Header.Image_Format == ImageFormat.RGBA8)
{
}
else
{
switch (Header.Palette_Format)
{
case PixelFormat.RGB565:
case PixelFormat.RGB5A3:
Palette = new ushort[Header.Palette_Entry_Count];
for (int i = 0; i < Header.Palette_Entry_Count; i++)
{
int offset = (int)(Header.Palette_Offset + i * 2);
Palette[i] = (ushort)((Data[offset] << 8) | Data[offset + 1]);
}
break;
}
switch (Header.Image_Format)
{
case ImageFormat.I4:
Image_Data = Data.Skip((int)Header.Image_Data_Offset).Take(((Header.Width * Header.Height) + 1) / 2).ToArray();
Buffer.BlockCopy(I4.DecodeI4(Image_Data, Header.Width, Header.Height), 0, Bitmap_Data, 0, Bitmap_Data.Length);
break;
case ImageFormat.I8:
Image_Data = Data.Skip((int)Header.Image_Data_Offset).Take(Header.Width * Header.Height).ToArray();
Buffer.BlockCopy(I8.DecodeI8(Image_Data, Header.Width, Header.Height), 0, Bitmap_Data, 0, Bitmap_Data.Length);
break;
case ImageFormat.IA4:
Image_Data = Data.Skip((int)Header.Image_Data_Offset).Take(Header.Width * Header.Height).ToArray();
Buffer.BlockCopy(IA4.DecodeIA4(Image_Data, Header.Width, Header.Height, Color.White), 0, Bitmap_Data, 0, Bitmap_Data.Length);
break;
case ImageFormat.IA8:
Image_Data = Data.Skip((int)Header.Image_Data_Offset).Take((Header.Width * Header.Height) * 2).ToArray();
Buffer.BlockCopy(IA8.DecodeIA8(Image_Data, Header.Width, Header.Height), 0, Bitmap_Data, 0, Bitmap_Data.Length);
break;
case ImageFormat.C4:
Image_Data = Data.Skip((int)Header.Image_Data_Offset).Take((Header.Width * Header.Height) / 2).ToArray();
Buffer.BlockCopy(C4.DecodeC4(Image_Data, Palette, Header.Width, Header.Height, (ColorFormat)Header.Palette_Format), 0, Bitmap_Data, 0, Bitmap_Data.Length);
break;
case ImageFormat.C8:
Image_Data = Data.Skip((int)Header.Image_Data_Offset).Take(Header.Width * Header.Height).ToArray();
int Index = 0;
for (int blockY = 0; blockY < Header.Height; blockY += 4)
{
for (int blockX = 0; blockX < Header.Width; blockX += 8)
{
for (int Y = 0; Y < 4; Y++)
{
for (int X = 0; X < 8; X++)
{
ushort Pixel = Palette[Image_Data[Index]];
int New_Index = Header.Width * (blockY + Y) + blockX + X;
byte A = 0, R = 0, G = 0, B = 0;
switch (Header.Palette_Format)
{
case PixelFormat.RGB565:
RGB565.ToARGB8(Pixel, out R, out G, out B);
A = 0xFF;
break;
case PixelFormat.RGB5A3:
RGB5A3.ToARGB8(Pixel, out A, out R, out G, out B);
break;
default:
throw new NotImplementedException("Pixel format is not implemented!");
}
Bitmap_Data[New_Index * 4] = B;
Bitmap_Data[New_Index * 4 + 1] = G;
Bitmap_Data[New_Index * 4 + 2] = R;
Bitmap_Data[New_Index * 4 + 3] = A;
Index++;
}
}
}
}
break;
default:
throw new NotImplementedException("Image Format is not implemented!");
}
}
Bitmap_Image = Utilities.BitmapUtilities.CreateBitmap(Bitmap_Data, Header.Width, Header.Height);
}
void Unity.Jobs.IJobParallelFor.Execute(int i)
{
var value = data[i];
data[i] = new RGB565(Invert(value.R), Invert(value.G), Invert(value.B));
}