private bool ReadChannel(EXRFile file, IEXRReader reader, out Channel channel, out int bytesRead)
{
var start = reader.Position;
var name = reader.ReadNullTerminatedString(255);
if (name == "")
{
channel = null;
bytesRead = reader.Position - start;
return(false);
}
channel = new Channel(
name,
(PixelType)reader.ReadInt32(),
reader.ReadByte() != 0,
reader.ReadByte(), reader.ReadByte(), reader.ReadByte(),
reader.ReadInt32(), reader.ReadInt32());
bytesRead = reader.Position - start;
return(true);
}
/// <summary>
/// Returns true unless this is the end of the header
/// </summary>
public bool Read(EXRFile file, IEXRReader reader)
{
var maxLen = file.Version.MaxNameLength;
try
{
Name = reader.ReadNullTerminatedString(maxLen);
}
catch (Exception e)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute name: " + e.Message, e);
}
if (Name == "")
{
return(false);
}
try
{
Type = reader.ReadNullTerminatedString(maxLen);
}
catch (Exception e)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute type for '" + Name + "': " + e.Message, e);
}
if (Type == "")
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute type for '" + Name + "': Cannot be an empty string.");
}
Size = reader.ReadInt32();
switch (Type)
{
case "box2i":
if (Size != 16)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type box2i: Size must be 16 bytes, was " + Size + ".");
}
Value = new Box2I(reader.ReadInt32(), reader.ReadInt32(), reader.ReadInt32(), reader.ReadInt32());
break;
case "box2f":
if (Size != 16)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type box2f: Size must be 16 bytes, was " + Size + ".");
}
Value = new Box2F(reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
break;
case "chromaticities":
if (Size != 32)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type chromaticities: Size must be 32 bytes, was " + Size + ".");
}
Value = new Chromaticities(reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
break;
case "compression":
if (Size != 1)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type compression: Size must be 1 byte, was " + Size + ".");
}
Value = (EXRCompression)reader.ReadByte();
break;
case "double":
if (Size != 8)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type double: Size must be 8 bytes, was " + Size + ".");
}
Value = reader.ReadDouble();
break;
case "envmap":
if (Size != 1)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type envmap: Size must be 1 byte, was " + Size + ".");
}
Value = (EnvMap)reader.ReadByte();
break;
case "float":
if (Size != 4)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type float: Size must be 4 bytes, was " + Size + ".");
}
Value = reader.ReadSingle();
break;
case "int":
if (Size != 4)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type int: Size must be 4 bytes, was " + Size + ".");
}
Value = reader.ReadInt32();
break;
case "keycode":
if (Size != 28)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type keycode: Size must be 28 bytes, was " + Size + ".");
}
Value = new KeyCode(reader.ReadInt32(), reader.ReadInt32(), reader.ReadInt32(), reader.ReadInt32(), reader.ReadInt32(), reader.ReadInt32(), reader.ReadInt32());
break;
case "lineOrder":
if (Size != 1)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type lineOrder: Size must be 1 byte, was " + Size + ".");
}
Value = (LineOrder)reader.ReadByte();
break;
case "m33f":
if (Size != 36)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type m33f: Size must be 36 bytes, was " + Size + ".");
}
Value = new M33F(
reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(),
reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(),
reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
break;
case "m44f":
if (Size != 64)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type m44f: Size must be 64 bytes, was " + Size + ".");
}
Value = new M44F(
reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(),
reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(),
reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(),
reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
break;
case "rational":
if (Size != 8)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type rational: Size must be 8 bytes, was " + Size + ".");
}
Value = new Rational(reader.ReadInt32(), reader.ReadUInt32());
break;
case "string":
if (Size < 0)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type string: Invalid Size, was " + Size + ".");
}
Value = reader.ReadString(Size);
break;
case "stringvector":
if (Size == 0)
{
Value = new List <string>();
}
else if (Size < 4)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type stringvector: Size must be at least 4 bytes or 0 bytes, was " + Size + ".");
}
else
{
var strings = new List <string>();
Value = strings;
var bytesRead = 0;
while (bytesRead < Size)
{
var loc = reader.Position;
var str = reader.ReadString();
strings.Add(str);
bytesRead += reader.Position - loc;
}
if (bytesRead != Size)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type stringvector: Read " + bytesRead + " bytes but Size was " + Size + ".");
}
}
break;
case "tiledesc":
if (Size != 9)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type tiledesc: Size must be 9 bytes, was " + Size + ".");
}
Value = new TileDesc(reader.ReadUInt32(), reader.ReadUInt32(), reader.ReadByte());
break;
case "timecode":
if (Size != 8)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type timecode: Size must be 8 bytes, was " + Size + ".");
}
Value = new TimeCode(reader.ReadUInt32(), reader.ReadUInt32());
break;
case "v2i":
if (Size != 8)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type v2i: Size must be 8 bytes, was " + Size + ".");
}
Value = new V2I(reader.ReadInt32(), reader.ReadInt32());
break;
case "v2f":
if (Size != 8)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type v2f: Size must be 8 bytes, was " + Size + ".");
}
Value = new V2F(reader.ReadSingle(), reader.ReadSingle());
break;
case "v3i":
if (Size != 12)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type v3i: Size must be 12 bytes, was " + Size + ".");
}
Value = new V3I(reader.ReadInt32(), reader.ReadInt32(), reader.ReadInt32());
break;
case "v3f":
if (Size != 12)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type v3f: Size must be 12 bytes, was " + Size + ".");
}
Value = new V3F(reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
break;
case "chlist":
var chlist = new ChannelList();
try
{
chlist.Read(file, reader, Size);
}
catch (Exception e)
{
throw new EXRFormatException("Invalid or corrupt EXR header attribute '" + Name + "' of type chlist: " + e.Message, e);
}
Value = chlist;
break;
case "preview":
default:
Value = reader.ReadBytes(Size);
break;
}
return(true);
}