public Reader(Stream stream, QntMetaData info)
{
m_width = (int)info.Width;
m_height = (int)info.Height;
int w = (m_width + 1) & ~1;
int h = (m_height + 1) & ~1;
int rgb_size = h * w * 3;
m_bpp = info.AlphaSize != 0 ? 4 : 3;
m_input = new byte[rgb_size];
var alpha_pos = stream.Position + info.RGBSize;
using (var zstream = new ZLibStream(stream, CompressionMode.Decompress, true))
if (rgb_size != zstream.Read(m_input, 0, rgb_size))
{
throw new InvalidFormatException("Unexpected end of file");
}
if (info.AlphaSize != 0)
{
int alpha_size = w * m_height;
m_alpha = new byte[alpha_size];
stream.Position = alpha_pos;
using (var zstream = new ZLibStream(stream, CompressionMode.Decompress, true))
if (alpha_size != zstream.Read(m_alpha, 0, alpha_size))
{
throw new InvalidFormatException("Unexpected end of file");
}
}
m_output = new byte[info.Width * info.Height * m_bpp];
}
public Reader(Stream stream, QntMetaData info)
{
m_width = (int)info.Width;
m_height = (int)info.Height;
int w = (m_width + 1) & ~1;
int h = (m_height + 1) & ~1;
int rgb_size = h * w * 3;
m_bpp = info.AlphaSize != 0 ? 4 : 3;
m_input = new byte[rgb_size];
var alpha_pos = stream.Position + info.RGBSize;
using (var zstream = new ZLibStream (stream, CompressionMode.Decompress, true))
if (rgb_size != zstream.Read (m_input, 0, rgb_size))
throw new InvalidFormatException ("Unexpected end of file");
if (info.AlphaSize != 0)
{
int alpha_size = w * m_height;
m_alpha = new byte[alpha_size];
stream.Position = alpha_pos;
using (var zstream = new ZLibStream (stream, CompressionMode.Decompress, true))
if (alpha_size != zstream.Read (m_alpha, 0, alpha_size))
throw new InvalidFormatException ("Unexpected end of file");
}
m_output = new byte[info.Width*info.Height*m_bpp];
}