private void Read(BinaryReaderEx input, bool isPac = false)
{
var magic = input.ReadUInt16();
var type = MagicNumberToType(magic);
if (type == PAAType.UNDEFINED)
{
type = (!isPac) ? PAAType.RGBA_4444 : PAAType.P8;
input.Position -= 2;
}
Type = type;
Palette = new Palette(type);
Palette.Read(input, mipmapOffsets);
mipmaps = new List <Mipmap>(16);
int i = 0;
while (input.ReadUInt32() != 0)
{
input.Position -= 4;
Debug.Assert(input.Position == mipmapOffsets[i]);
var mipmap = new Mipmap(input, mipmapOffsets[i++]);
mipmaps.Add(mipmap);
}
if (input.ReadUInt16() != 0)
{
throw new FormatException("Expected two more zero's at end of file.");
}
}
public static byte[] GetARGB32PixelData(PAA paa, Stream paaStream, Mipmap mipmap)
{
var input = new BinaryReaderEx(paaStream);
var rawData = mipmap.GetRawPixelData(input, paa.Type);
byte[] argbPixels;
switch (paa.Type)
{
case PAAType.RGBA_8888:
case PAAType.P8:
return(PixelFormatConversion.P8ToARGB32(rawData, paa.Palette)); //never uses swizzling
case PAAType.DXT1:
case PAAType.DXT2:
case PAAType.DXT3:
case PAAType.DXT4:
case PAAType.DXT5:
argbPixels = PixelFormatConversion.DXTToARGB32(rawData, mipmap.Width, mipmap.Height, (int)paa.Type); break;
case PAAType.RGBA_4444:
argbPixels = PixelFormatConversion.ARGB16ToARGB32(rawData); break;
case PAAType.RGBA_5551:
argbPixels = PixelFormatConversion.ARGB1555ToARGB32(rawData); break;
case PAAType.AI88:
argbPixels = PixelFormatConversion.AI88ToARGB32(rawData); break;
default:
throw new Exception($"Cannot retrieve pixel data from this PaaType: {paa.Type}");
}
ChannelSwizzling.Apply(argbPixels, paa.Palette.ChannelSwizzle);
return(argbPixels);
}
public static byte[] GetARGB32PixelData(PAA paa, Stream paaStream, int mipmapIndex = 0)
{
var input = new BinaryReaderEx(paaStream);
Mipmap mipmap = paa[mipmapIndex];
var rawData = mipmap.GetRawPixelData(input, paa.Type);
switch (paa.Type)
{
case PAAType.RGBA_8888:
case PAAType.P8:
return(PixelFormatConversion.P8ToARGB32(rawData, paa.Palette));
case PAAType.DXT1:
case PAAType.DXT2:
case PAAType.DXT3:
case PAAType.DXT4:
case PAAType.DXT5:
return(PixelFormatConversion.DXTToARGB32(rawData, mipmap.Width, mipmap.Height, (int)paa.Type));
case PAAType.RGBA_4444:
return(PixelFormatConversion.ARGB16ToARGB32(rawData));
case PAAType.RGBA_5551:
return(PixelFormatConversion.ARGB1555ToARGB32(rawData));
case PAAType.AI88:
return(PixelFormatConversion.AI88ToARGB32(rawData));
default:
throw new Exception($"Cannot retrieve pixel data from this PaaType: {paa.Type}");
}
}
public static byte[] GetARGB32PixelData(PAA paa, Stream paaStream, int mipmapIndex = 0)
{
Mipmap mipmap = paa[mipmapIndex];
return(GetARGB32PixelData(paa, paaStream, mipmap));
}