private void ParseInternal(Stream stream)
{
using (BinaryReader br = new BinaryReader(stream))
{
br.ReadInt32(); // unknown
m_cmpType = (Blp2CompressionType)br.ReadByte();
m_alphaBits = br.ReadByte();
int paletteBits = br.ReadByte();
br.ReadByte(); // unknown
int width = br.ReadInt32();
int height = br.ReadInt32();
Size fullImageSize = new Size(width, height);
m_mainSize = fullImageSize;
int[] mipmapOffsets = new int[MAX_MIPMAP_COUNT];
for (int i = 0; i < MAX_MIPMAP_COUNT; i++)
{
mipmapOffsets[i] = br.ReadInt32();
}
int[] sizes = new int[MAX_MIPMAP_COUNT];
for (int i = 0; i < MAX_MIPMAP_COUNT; i++)
{
sizes[i] = br.ReadInt32();
}
if (m_cmpType == Blp2CompressionType.Palette)
{
if (paletteBits != 8)
{
throw new ArgumentException("Palettized data can only have 8 bits per pixel.", "stream");
}
}
else if (m_cmpType == Blp2CompressionType.DirectX)
{
if (m_alphaBits != 0 && m_alphaBits != 8 && m_alphaBits != 1)
{
throw new ArgumentException("DXT2/DXT4-compressed images are not yet supported.");
}
}
else if (m_cmpType == Blp2CompressionType.Jpeg)
{
}
else
{
throw new ArgumentException("Unknown file format.");
}
if (m_cmpType == Blp2CompressionType.Palette)
{
ParsePalette(stream, br);
}
else if (m_cmpType == Blp2CompressionType.Jpeg)
{
ParseJpegHeader(stream, br);
}
for (int i = 0; i < MAX_MIPMAP_COUNT; i++)
{
int currentOffset = mipmapOffsets[i];
int currentSize = sizes[i];
if (currentOffset == 0 || currentSize == 0)
{
break;
}
Size mipmapSize = Blp1Parser.GetSize(fullImageSize, i);
byte[] data = new byte[currentSize];
stream.Seek(currentOffset, SeekOrigin.Begin);
br.Read(data, 0, currentSize);
Blp2MipMap mipmap = new Blp2MipMap(mipmapSize, i, data);
m_mipmaps.Add(mipmap);
}
}
}
public override Size GetSizeOfMipmap(int mipmapIndex)
{
return(Blp1Parser.GetSize(m_mainSize, mipmapIndex));
}