public SgRgbReader(IBinaryStream input, SgMetaData info)
{
if (info.Type != SgType.cRGB || !(0x18 == info.BPP || 0x20 == info.BPP))
{
throw new InvalidFormatException();
}
m_input = input;
m_info = info;
m_width = (int)info.Width;
m_height = (int)info.Height;
m_stride = m_width * 4;
m_channels = m_info.BPP / 8;
}
ImageData ReadJpeg(IBinaryStream stream, SgMetaData info)
{
stream.Position = info.DataOffset;
var input = stream.ReadBytes(info.DataSize);
if (input.Length != info.DataSize)
{
throw new EndOfStreamException();
}
PakOpener.Decrypt(input, info.JpegKey);
using (var img = new MemoryStream(input))
{
var decoder = new JpegBitmapDecoder(img, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
var frame = decoder.Frames[0];
frame.Freeze();
return(new ImageData(frame, info));
}
}