public AgfReader(Stream input, AgfMetaData info)
{
m_input = new ArcView.Reader(input);
m_bpp = info.BPP;
m_source_bpp = info.SourceBPP;
input.Position = info.DataOffset;
m_width = (int)info.Width;
m_height = (int)info.Height;
m_output = new byte[m_height * m_width * m_bpp / 8];
m_palette = info.Palette;
}
public override ImageMetaData ReadMetaData(Stream stream)
{
var header = new byte[0x20];
if (0x18 != stream.Read(header, 0, 0x18))
{
return(null);
}
uint id = LittleEndian.ToUInt32(header, 0);
if (Signature != id && 0 != id)
{
return(null);
}
int type = LittleEndian.ToInt32(header, 4);
if (type != 1 && type != 2)
{
return(null);
}
int unpacked_size = LittleEndian.ToInt32(header, 0x10);
int packed_size = LittleEndian.ToInt32(header, 0x14);
using (var unpacked = AgfReader.OpenSection(stream, unpacked_size, packed_size))
using (var reader = new BinaryReader(unpacked))
{
if (0x20 != reader.Read(header, 0, 0x20))
{
return(null);
}
var info = new AgfMetaData
{
Width = LittleEndian.ToUInt32(header, 0x14),
Height = LittleEndian.ToUInt32(header, 0x18),
BPP = 1 == type ? 24 : 32,
SourceBPP = LittleEndian.ToInt16(header, 0x1E),
DataOffset = 0x18 + (uint)packed_size,
};
if (0 == info.SourceBPP)
{
return(null);
}
if (8 == info.SourceBPP)
{
reader.Read(header, 0, 0x18); // skip rest of the header
info.Palette = ReadPalette(reader.BaseStream);
}
return(info);
}
}
public override ImageMetaData ReadMetaData(Stream stream)
{
var header = new byte[0x20];
if (0x18 != stream.Read (header, 0, 0x18))
return null;
uint id = LittleEndian.ToUInt32 (header, 0);
if (Signature != id && 0 != id)
return null;
int type = LittleEndian.ToInt32 (header, 4);
if (type != 1 && type != 2)
return null;
int unpacked_size = LittleEndian.ToInt32 (header, 0x10);
int packed_size = LittleEndian.ToInt32 (header, 0x14);
using (var unpacked = AgfReader.OpenSection (stream, unpacked_size, packed_size))
using (var reader = new BinaryReader (unpacked))
{
if (0x20 != reader.Read (header, 0, 0x20))
return null;
var info = new AgfMetaData
{
Width = LittleEndian.ToUInt32 (header, 0x14),
Height = LittleEndian.ToUInt32 (header, 0x18),
BPP = 1 == type ? 24 : 32,
SourceBPP = LittleEndian.ToInt16 (header, 0x1E),
DataOffset = 0x18 + (uint)packed_size,
};
if (0 == info.SourceBPP)
return null;
if (8 == info.SourceBPP)
{
reader.Read (header, 0, 0x18); // skip rest of the header
info.Palette = ReadPalette (reader.BaseStream);
}
return info;
}
}
public AgfReader(Stream input, AgfMetaData info)
{
m_input = new ArcView.Reader (input);
m_bpp = info.BPP;
m_source_bpp = info.SourceBPP;
input.Position = info.DataOffset;
m_width = (int)info.Width;
m_height = (int)info.Height;
m_output = new byte[m_height * m_width * m_bpp / 8];
m_palette = info.Palette;
}
