public Reader(Stream stream, CmMetaData info)
{
m_input = stream;
m_width = (int)info.Width;
m_height = (int)info.Height;
m_pixel_size = info.BPP / 8;
m_compressed = info.IsCompressed;
m_data_length = (int)info.DataLength;
switch (m_pixel_size)
{
case 1: Format = PixelFormats.Indexed8; break;
case 3: Format = PixelFormats.Bgr24; break;
case 4: Format = PixelFormats.Bgr32; break;
default: throw new InvalidFormatException("Invalid color depth");
}
if (info.Colors > 0)
{
m_input.Position = 0x20;
Palette = ImageFormat.ReadPalette(m_input, info.Colors, PaletteFormat.Bgr);
}
m_input.Position = info.DataOffset;
int size = info.IsCompressed ? m_width * m_height * m_pixel_size : (int)info.DataLength;
m_pixels = new byte[size];
}
public override ImageMetaData ReadMetaData(IBinaryStream stream)
{
if ('C' != stream.ReadByte() || 'M' != stream.ReadByte())
{
return(null);
}
var header = stream.ReadBytes(0x1e);
if (header.Length != 0x1e)
{
return(null);
}
if (1 != header[0x0c])
{
return(null);
}
uint size = LittleEndian.ToUInt32(header, 0);
if (size != stream.Length)
{
return(null);
}
var info = new CmMetaData();
info.Width = LittleEndian.ToUInt16(header, 4);
info.Height = LittleEndian.ToUInt16(header, 6);
info.Colors = LittleEndian.ToUInt16(header, 8);
info.BPP = header[0x0a];
info.IsCompressed = 0 != header[0x0b];
info.DataOffset = LittleEndian.ToUInt32(header, 0x0e);
info.DataLength = LittleEndian.ToUInt32(header, 0x12);
if (info.DataLength > size)
{
return(null);
}
return(info);
}
public Reader(Stream stream, CmMetaData info)
{
m_input = stream;
m_width = (int)info.Width;
m_height = (int)info.Height;
m_pixel_size = info.BPP/8;
m_compressed = info.IsCompressed;
m_data_length = (int)info.DataLength;
switch (m_pixel_size)
{
case 1: Format = PixelFormats.Indexed8; break;
case 3: Format = PixelFormats.Bgr24; break;
case 4: Format = PixelFormats.Bgr32; break;
default: throw new InvalidFormatException ("Invalid color depth");
}
if (info.Colors > 0)
{
m_input.Position = 0x20;
Palette = RleDecoder.ReadPalette (m_input, info.Colors, 3);
}
m_input.Position = info.DataOffset;
int size = info.IsCompressed ? m_width*m_height*m_pixel_size : (int)info.DataLength;
m_pixels = new byte[size];
}
public override ImageMetaData ReadMetaData(Stream stream)
{
if ('C' != stream.ReadByte() || 'M' != stream.ReadByte())
return null;
var header = new byte[0x1e];
if (header.Length != stream.Read (header, 0, header.Length))
return null;
if (1 != header[0x0c])
return null;
uint size = LittleEndian.ToUInt32 (header, 0);
if (size != stream.Length)
return null;
var info = new CmMetaData();
info.Width = LittleEndian.ToUInt16 (header, 4);
info.Height = LittleEndian.ToUInt16 (header, 6);
info.Colors = LittleEndian.ToUInt16 (header, 8);
info.BPP = header[0x0a];
info.IsCompressed = 0 != header[0x0b];
info.DataOffset = LittleEndian.ToUInt32 (header, 0x0e);
info.DataLength = LittleEndian.ToUInt32 (header, 0x12);
if (info.DataLength > size)
return null;
return info;
}
