public override ImageData Read(Stream stream, ImageMetaData info)
{
using (var reader = new AgfReader(stream, (AgfMetaData)info))
{
reader.Unpack();
return(ImageData.Create(info, reader.Format, null, reader.Data));
}
}
public override ImageData Read(Stream stream, ImageMetaData info)
{
using (var reader = new AgfReader (stream, (AgfMetaData)info))
{
reader.Unpack();
return ImageData.Create (info, reader.Format, null, reader.Data);
}
}
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);
}
}