public override ImageMetaData ReadMetaData(IBinaryStream stream)
{
if ('A' != stream.ReadByte() || 'M' != stream.ReadByte())
{
return(null);
}
var header = new byte[0x30];
if (0x2e != stream.Read(header, 2, 0x2e))
{
return(null);
}
uint size = LittleEndian.ToUInt32(header, 2);
if (size != stream.Length)
{
return(null);
}
int am_type = header[0x16];
if (am_type != 2 && am_type != 1 || header[0x18] != 1)
{
return(null);
}
var info = new AmMetaData();
info.Width = LittleEndian.ToUInt16(header, 6);
info.Height = LittleEndian.ToUInt16(header, 8);
info.MaskWidth = LittleEndian.ToUInt16(header, 0x0a);
info.MaskHeight = LittleEndian.ToUInt16(header, 0x0c);
info.Colors = LittleEndian.ToUInt16(header, 0x12);
info.BPP = header[0x14];
info.IsCompressed = 0 != header[0x15];
info.DataOffset = LittleEndian.ToUInt32(header, 0x1a);
info.DataLength = LittleEndian.ToUInt32(header, 0x1e);
info.MaskOffset = LittleEndian.ToUInt32(header, 0x22);
info.MaskLength = LittleEndian.ToUInt32(header, 0x26);
info.IsMaskCompressed = 0 != header[0x2a];
if (checked (info.DataLength + info.MaskLength) > size)
{
return(null);
}
return(info);
}
public Reader(Stream stream, AmMetaData info)
{
m_input = stream;
m_info = info;
m_width = (int)info.Width;
m_height = (int)info.Height;
m_pixel_size = info.BPP / 8;
if (m_pixel_size != 3 && m_pixel_size != 4 && m_pixel_size != 1)
{
throw new InvalidFormatException("Invalid color depth");
}
Format = PixelFormats.Bgra32;
int size = info.IsCompressed ? m_width * m_height * m_pixel_size : (int)info.DataLength;
m_output = new byte[size];
uint mask_size = info.IsMaskCompressed ? info.MaskWidth * info.MaskHeight : info.MaskLength;
m_alpha = new byte[mask_size];
m_pixels = new byte[m_width * m_height * 4];
}
public override ImageMetaData ReadMetaData(IBinaryStream stream)
{
var header = stream.ReadHeader(0x30);
if ('A' != header[0] || 'M' != header[1])
{
return(null);
}
uint size = header.ToUInt32(2);
if (size != stream.Length)
{
return(null);
}
int am_type = header[0x16];
if (am_type != 2 && am_type != 1 || header[0x18] != 1)
{
return(null);
}
var info = new AmMetaData {
Width = header.ToUInt16(6),
Height = header.ToUInt16(8),
MaskWidth = header.ToUInt16(0x0A),
MaskHeight = header.ToUInt16(0x0C),
Colors = header.ToUInt16(0x12),
BPP = header[0x14],
IsCompressed = 0 != header[0x15],
DataOffset = header.ToUInt32(0x1A),
DataLength = header.ToUInt32(0x1E),
MaskOffset = header.ToUInt32(0x22),
MaskLength = header.ToUInt32(0x26),
IsMaskCompressed = 0 != header[0x2A],
};
if (checked (info.DataLength + info.MaskLength) > size)
{
return(null);
}
return(info);
}
public override ImageMetaData ReadMetaData(Stream stream)
{
if ('A' != stream.ReadByte() || 'M' != stream.ReadByte())
return null;
var header = new byte[0x30];
if (0x2e != stream.Read (header, 2, 0x2e))
return null;
uint size = LittleEndian.ToUInt32 (header, 2);
if (size != stream.Length)
return null;
int am_type = header[0x16];
if (am_type != 2 && am_type != 1 || header[0x18] != 1)
return null;
var info = new AmMetaData();
info.Width = LittleEndian.ToUInt16 (header, 6);
info.Height = LittleEndian.ToUInt16 (header, 8);
info.MaskWidth = LittleEndian.ToUInt16 (header, 0x0a);
info.MaskHeight = LittleEndian.ToUInt16 (header, 0x0c);
info.Colors = LittleEndian.ToUInt16 (header, 0x12);
info.BPP = header[0x14];
info.IsCompressed = 0 != header[0x15];
info.DataOffset = LittleEndian.ToUInt32 (header, 0x1a);
info.DataLength = LittleEndian.ToUInt32 (header, 0x1e);
info.MaskOffset = LittleEndian.ToUInt32 (header, 0x22);
info.MaskLength = LittleEndian.ToUInt32 (header, 0x26);
info.IsMaskCompressed = 0 != header[0x2a];
if (checked(info.DataLength + info.MaskLength) > size)
return null;
return info;
}
public Reader(Stream stream, AmMetaData info)
{
m_input = stream;
m_info = info;
m_width = (int)info.Width;
m_height = (int)info.Height;
m_pixel_size = info.BPP/8;
if (m_pixel_size != 3 && m_pixel_size != 4 && m_pixel_size != 1)
throw new InvalidFormatException ("Invalid color depth");
Format = PixelFormats.Bgra32;
int size = info.IsCompressed ? m_width*m_height*m_pixel_size : (int)info.DataLength;
m_output = new byte[size];
uint mask_size = info.IsMaskCompressed ? info.MaskWidth*info.MaskHeight : info.MaskLength;
m_alpha = new byte[mask_size];
m_pixels = new byte[m_width*m_height*4];
}
