public AlphaChannels(ImageResource imgRes)
: base(imgRes)
{
BinaryReverseReader reader = imgRes.DataReader;
// the names are pascal strings without padding!!!
while ((reader.BaseStream.Length - reader.BaseStream.Position) > 0)
{
byte stringLength = reader.ReadByte();
string s = new string(reader.ReadChars(stringLength));
if (s.Length > 0)
{
m_channelNames.Add(s);
}
}
reader.Close();
}
//////////////////////////////////////////////////////////////////
public ImageResource(BinaryReverseReader reader)
{
m_osType = new string(reader.ReadChars(4));
if (m_osType != "8BIM" && m_osType != "MeSa")
{
throw new InvalidOperationException("Could not read an image resource");
}
m_id = reader.ReadInt16();
m_name = reader.ReadPascalString();
uint settingLength = reader.ReadUInt32();
m_data = reader.ReadBytes((int)settingLength);
if (reader.BaseStream.Position % 2 == 1)
{
reader.ReadByte();
}
}
public Layer(BinaryReverseReader reader, PsdFile psdFile)
{
Debug.WriteLine("Layer started at " + reader.BaseStream.Position.ToString());
m_psdFile = psdFile;
m_rect = new Rectangle();
m_rect.Y = reader.ReadInt32();
m_rect.X = reader.ReadInt32();
m_rect.Height = reader.ReadInt32() - m_rect.Y;
m_rect.Width = reader.ReadInt32() - m_rect.X;
//-----------------------------------------------------------------------
int numberOfChannels = reader.ReadUInt16();
this.m_channels.Clear();
for (int channel = 0; channel < numberOfChannels; channel++)
{
Channel ch = new Channel(reader, this);
m_channels.Add(ch);
m_sortedChannels.Add(ch.ID, ch);
}
//-----------------------------------------------------------------------
string signature = new string(reader.ReadChars(4));
if (signature != "8BIM")
throw (new IOException("Layer Channelheader error!"));
m_blendModeKey = new string(reader.ReadChars(4));
m_opacity = reader.ReadByte();
m_clipping = reader.ReadByte() > 0;
//-----------------------------------------------------------------------
byte flags = reader.ReadByte();
m_flags = new BitVector32(flags);
//-----------------------------------------------------------------------
reader.ReadByte(); //padding
//-----------------------------------------------------------------------
Debug.WriteLine("Layer extraDataSize started at " + reader.BaseStream.Position.ToString());
// this is the total size of the MaskData, the BlendingRangesData, the
// Name and the AdjustmenLayerInfo
uint extraDataSize = reader.ReadUInt32();
// remember the start position for calculation of the
// AdjustmenLayerInfo size
long extraDataStartPosition = reader.BaseStream.Position;
m_maskData = new Mask(reader, this);
m_blendingRangesData = new BlendingRanges(reader, this);
//-----------------------------------------------------------------------
long namePosition = reader.BaseStream.Position;
m_name = reader.ReadPascalString();
int paddingBytes = (int)((reader.BaseStream.Position - namePosition) % 4);
Debug.Print("Layer {0} padding bytes after name", paddingBytes);
reader.ReadBytes(paddingBytes);
//-----------------------------------------------------------------------
m_adjustmentInfo.Clear();
long adjustmenLayerEndPos = extraDataStartPosition + extraDataSize;
while (reader.BaseStream.Position < adjustmenLayerEndPos)
{
try
{
m_adjustmentInfo.Add(new AdjusmentLayerInfo(reader, this));
}
catch
{
reader.BaseStream.Position = adjustmenLayerEndPos;
}
}
//-----------------------------------------------------------------------
// make shure we are not on a wrong offset, so set the stream position
// manually
reader.BaseStream.Position = adjustmenLayerEndPos;
}
internal Mask(BinaryReverseReader reader, Layer layer)
{
Debug.WriteLine("Mask started at " + reader.BaseStream.Position.ToString());
m_layer = layer;
uint maskLength = reader.ReadUInt32();
if (maskLength <= 0)
return;
long startPosition = reader.BaseStream.Position;
//-----------------------------------------------------------------------
m_rect = new Rectangle();
m_rect.Y = reader.ReadInt32();
m_rect.X = reader.ReadInt32();
m_rect.Height = reader.ReadInt32() - m_rect.Y;
m_rect.Width = reader.ReadInt32() - m_rect.X;
m_defaultColor = reader.ReadByte();
//-----------------------------------------------------------------------
byte flags = reader.ReadByte();
m_flags = new BitVector32(flags);
//-----------------------------------------------------------------------
if (maskLength == 36)
{
BitVector32 realFlags = new BitVector32(reader.ReadByte());
byte realUserMaskBackground = reader.ReadByte();
Rectangle rect = new Rectangle();
rect.Y = reader.ReadInt32();
rect.X = reader.ReadInt32();
rect.Height = reader.ReadInt32() - m_rect.Y;
rect.Width = reader.ReadInt32() - m_rect.X;
}
// there is other stuff following, but we will ignore this.
reader.BaseStream.Position = startPosition + maskLength;
}
public Layer(BinaryReverseReader reader, PsdFile psdFile)
{
Debug.WriteLine("Layer started at " + reader.BaseStream.Position.ToString());
m_psdFile = psdFile;
m_rect = new Rectangle();
m_rect.Y = reader.ReadInt32();
m_rect.X = reader.ReadInt32();
m_rect.Height = reader.ReadInt32() - m_rect.Y;
m_rect.Width = reader.ReadInt32() - m_rect.X;
//-----------------------------------------------------------------------
int numberOfChannels = reader.ReadUInt16();
this.m_channels.Clear();
for (int channel = 0; channel < numberOfChannels; channel++)
{
Channel ch = new Channel(reader, this);
m_channels.Add(ch);
m_sortedChannels.Add(ch.ID, ch);
}
//-----------------------------------------------------------------------
string signature = new string(reader.ReadChars(4));
if (signature != "8BIM")
{
throw (new IOException("Layer Channelheader error!"));
}
m_blendModeKey = new string(reader.ReadChars(4));
m_opacity = reader.ReadByte();
m_clipping = reader.ReadByte() > 0;
//-----------------------------------------------------------------------
byte flags = reader.ReadByte();
m_flags = new BitVector32(flags);
//-----------------------------------------------------------------------
reader.ReadByte(); //padding
//-----------------------------------------------------------------------
Debug.WriteLine("Layer extraDataSize started at " + reader.BaseStream.Position.ToString());
// this is the total size of the MaskData, the BlendingRangesData, the
// Name and the AdjustmenLayerInfo
uint extraDataSize = reader.ReadUInt32();
// remember the start position for calculation of the
// AdjustmenLayerInfo size
long extraDataStartPosition = reader.BaseStream.Position;
m_maskData = new Mask(reader, this);
m_blendingRangesData = new BlendingRanges(reader, this);
//-----------------------------------------------------------------------
long namePosition = reader.BaseStream.Position;
m_name = reader.ReadPascalString();
int paddingBytes = (int)((reader.BaseStream.Position - namePosition) % 4);
Debug.Print("Layer {0} padding bytes after name", paddingBytes);
reader.ReadBytes(paddingBytes);
//-----------------------------------------------------------------------
m_adjustmentInfo.Clear();
long adjustmenLayerEndPos = extraDataStartPosition + extraDataSize;
while (reader.BaseStream.Position < adjustmenLayerEndPos)
{
try
{
m_adjustmentInfo.Add(new AdjusmentLayerInfo(reader, this));
}
catch
{
reader.BaseStream.Position = adjustmenLayerEndPos;
}
}
//-----------------------------------------------------------------------
// make shure we are not on a wrong offset, so set the stream position
// manually
reader.BaseStream.Position = adjustmenLayerEndPos;
}
//////////////////////////////////////////////////////////////////
public ImageResource(BinaryReverseReader reader)
{
m_osType = new string(reader.ReadChars(4));
if(m_osType != "8BIM" && m_osType != "MeSa") {
throw new InvalidOperationException("Could not read an image resource");
}
m_id = reader.ReadInt16();
m_name = reader.ReadPascalString();
uint settingLength = reader.ReadUInt32();
m_data = reader.ReadBytes((int)settingLength);
if(reader.BaseStream.Position % 2 == 1)
reader.ReadByte();
}
/// <summary>Loads up the Layers of the supplied PSD file.</summary>
private void LoadLayers(BinaryReverseReader reader)
{
Debug.WriteLine("LoadLayers started at " + reader.BaseStream.Position.ToString());
uint layersInfoSectionLength = reader.ReadUInt32();
if (layersInfoSectionLength <= 0)
return;
long startPosition = reader.BaseStream.Position;
short numberOfLayers = reader.ReadInt16();
// If <0, then number of layers is absolute value,
// and the first alpha channel contains the transparency data for
// the merged result.
if (numberOfLayers < 0)
{
AbsoluteAlpha = true;
numberOfLayers = Math.Abs(numberOfLayers);
}
m_layers.Clear();
if (numberOfLayers == 0)
return;
for (int i = 0; i < numberOfLayers; i++)
{
m_layers.Add(new Layer(reader, this));
}
foreach (Layer layer in m_layers)
{
foreach (Layer.Channel channel in layer.Channels)
{
if (channel.ID != -2)
channel.LoadPixelData(reader);
}
layer.MaskData.LoadPixelData(reader);
}
if (reader.BaseStream.Position % 2 == 1)
reader.ReadByte();
// make sure we are not on a wrong offset, so set the stream position
// manually
reader.BaseStream.Position = startPosition + layersInfoSectionLength;
}
