public LayerAndMaskInformationSection Read(Stream stream, FileVersion version)
{
var section = new LayerAndMaskInformationSection();
var reader = new BigEndianBinaryReader(stream);
section.Length = version == FileVersion.Psd ? reader.ReadInt32() : reader.ReadInt64();
section.Offset = stream.Position;
// Layers information.
section.LayersInformation = new LayersInformation();
section.LayersInformation.Length = version == FileVersion.Psd ? reader.ReadInt32() : reader.ReadInt64();
section.LayersInformation.LayerCount = reader.ReadInt16();
if (section.LayersInformation.LayerCount < 0)
{
section.LayersInformation.LayerCount *= -1;
section.LayersInformation.IsFirstAlphaChannel = true;
}
section.LayersInformation.Offset = stream.Position;
section.LayersInformation.Length -= 2; // subtract layer count bytes.
// GlobalLayerMaskInformation
stream.Position = section.LayersInformation.Offset + section.LayersInformation.Length;
var globalLayerMaskInformationLength = reader.ReadInt32();
if (globalLayerMaskInformationLength > 0)
{
section.GlobalLayerMaskInformation = new GlobalLayerMaskInformation();
section.GlobalLayerMaskInformation.Length = globalLayerMaskInformationLength;
section.GlobalLayerMaskInformation.OverlayColorSpace = reader.ReadInt16();
section.GlobalLayerMaskInformation.ColorComponents = new short[4];
for (int i = 0; i < section.GlobalLayerMaskInformation.ColorComponents.Length; i++)
{
section.GlobalLayerMaskInformation.ColorComponents[i] = reader.ReadInt16();
}
section.GlobalLayerMaskInformation.Opacity = reader.ReadInt16();
section.GlobalLayerMaskInformation.Kind = (GlobalLayerMaskInfoKind)reader.ReadByte();
section.GlobalLayerMaskInformation.Offset = stream.Position;
}
// AdditionalLayerInformation
stream.Position += globalLayerMaskInformationLength;
if (stream.Position != section.Offset + section.Length) // if we did not reach the end of section, than there is additional data.
{
section.AdditionalLayerInformation = new AdditionalLayerInformation();
section.AdditionalLayerInformation.Offset = stream.Position;
section.AdditionalLayerInformation.Length = (section.Offset + section.Length) - section.AdditionalLayerInformation.Offset;
}
stream.Position = section.Offset + section.Length;
return(section);
}
public List <LayerRecord> Read(Stream stream, LayersInformation layersInformation, FileVersion fileVersion)
{
var list = new List <LayerRecord>();
var reader = new BigEndianBinaryReader(stream);
stream.Position = layersInformation.Offset;
for (int i = 0; i < layersInformation.LayerCount; i++)
{
var layerRecord = new LayerRecord();
layerRecord.RectangleTop = reader.ReadInt32();
layerRecord.RectangleLeft = reader.ReadInt32();
layerRecord.RectangleBottom = reader.ReadInt32();
layerRecord.RectangleRight = reader.ReadInt32();
layerRecord.ChannelCount = reader.ReadInt16();
layerRecord.Channels = new ChannelInformation[layerRecord.ChannelCount];
for (int j = 0; j < layerRecord.ChannelCount; j++)
{
layerRecord.Channels[j] = new ChannelInformation();
layerRecord.Channels[j].Id = reader.ReadInt16();
layerRecord.Channels[j].Length = fileVersion == FileVersion.Psd ? reader.ReadInt32() : reader.ReadInt64();
}
layerRecord.BlendModeSignature = new string(reader.ReadChars(4));
layerRecord.BlendModeKey = new string(reader.ReadChars(4));
layerRecord.Opacity = reader.ReadByte();
layerRecord.Clipping = (Clipping)reader.ReadByte();
var flags = reader.ReadByte();
layerRecord.IsTransparencyProtected = flags.GetBit(0);
layerRecord.IsVisible = flags.GetBit(1);
layerRecord.IsObsolete = flags.GetBit(2);
if (flags.GetBit(3))
{
layerRecord.IsPixelIrrelevantToAppearance = flags.GetBit(4);
}
reader.ReadByte(); // filler
layerRecord.Length = reader.ReadInt32();
layerRecord.Offset = stream.Position;
// TODO: Layer mask / adjustment layer data
var maskLength = reader.ReadInt32();
stream.Position += maskLength;
// TODO: Layer blending ranges data
var blendingLength = reader.ReadInt32();
stream.Position += blendingLength;
layerRecord.Name = reader.ReadPascalString();
reader.ReadByte(); //???
layerRecord.AdditionalLayerInformation = new AdditionalLayerInformation();
layerRecord.AdditionalLayerInformation.Offset = stream.Position;
layerRecord.AdditionalLayerInformation.Length = (layerRecord.Offset + layerRecord.Length) - layerRecord.AdditionalLayerInformation.Offset;
stream.Position = layerRecord.Offset + layerRecord.Length;
list.Add(layerRecord);
}
return(list);
}