public AdjusmentLayerInfo(BinaryReverseReader reader, Layer layer)
{
Debug.WriteLine("AdjusmentLayerInfo started at " + reader.BaseStream.Position.ToString(CultureInfo.InvariantCulture));
Layer = layer;
String signature = new String(reader.ReadChars(4));
if (signature != "8BIM")
{
throw new IOException("Could not read an image resource");
}
Key = new String(reader.ReadChars(4));
UInt32 dataLength = reader.ReadUInt32();
Data = reader.ReadBytes((Int32)dataLength);
}
public ImageResource(BinaryReverseReader reverseReader)
{
Name = String.Empty;
OSType = new String(reverseReader.ReadChars(4));
if (OSType != "8BIM" && OSType != "MeSa")
{
throw new InvalidOperationException("Could not read an image resource");
}
ID = reverseReader.ReadInt16();
Name = reverseReader.ReadPascalString();
UInt32 settingLength = reverseReader.ReadUInt32();
Data = reverseReader.ReadBytes((Int32)settingLength);
if (reverseReader.BaseStream.Position % 2 == 1) reverseReader.ReadByte();
}
/// <summary>
/// Load up the masking information of the supplied PSD
/// </summary>
private void LoadGlobalLayerMask(BinaryReverseReader reader)
{
Debug.WriteLine("LoadGlobalLayerMask started at " + reader.BaseStream.Position.ToString(CultureInfo.InvariantCulture));
UInt32 maskLength = reader.ReadUInt32();
if (maskLength <= 0) return;
_globalLayerMaskData = reader.ReadBytes((Int32)maskLength);
}
} //end Load()
/// <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(CultureInfo.InvariantCulture));
UInt32 layersInfoSectionLength = reader.ReadUInt32();
if (layersInfoSectionLength <= 0)
return;
Int64 startPosition = reader.BaseStream.Position;
Int16 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);
}
_layers.Clear();
if (numberOfLayers == 0) return;
for (Int32 i = 0; i < numberOfLayers; i++)
{
_layers.Add(new Layer(reader, this));
}
foreach (Layer layer in Layers)
{
foreach (Layer.Channel channel in layer.Channels.Where(c => c.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;
}
public PsdFile Load(String filename)
{
using (FileStream stream = new FileStream(filename, FileMode.Open))
{
//binary reverse reader reads data types in big-endian format.
BinaryReverseReader reader = new BinaryReverseReader(stream);
#region "Headers"
//The headers area is used to check for a valid PSD file
Debug.WriteLine("LoadHeader started at " + reader.BaseStream.Position.ToString(CultureInfo.InvariantCulture));
String signature = new String(reader.ReadChars(4));
if (signature != "8BPS") throw new IOException("Bad or invalid file stream supplied");
//get the version number, should be 1 always
if ((Version = reader.ReadInt16()) != 1) throw new IOException("Invalid version number supplied");
//get rid of the 6 bytes reserverd in PSD format
reader.BaseStream.Position += 6;
//get the rest of the information from the PSD file.
//Everytime ReadInt16() is called, it reads 2 bytes.
//Everytime ReadInt32() is called, it reads 4 bytes.
_channels = reader.ReadInt16();
_rows = reader.ReadInt32();
_columns = reader.ReadInt32();
_depth = reader.ReadInt16();
ColorMode = (ColorModes)reader.ReadInt16();
//by end of headers, the reader has read 26 bytes into the file.
#endregion //End Headers
#region "ColorModeData"
Debug.WriteLine("LoadColorModeData started at " + reader.BaseStream.Position.ToString(CultureInfo.InvariantCulture));
UInt32 paletteLength = reader.ReadUInt32(); //readUint32() advances the reader 4 bytes.
if (paletteLength > 0)
{
ColorModeData = reader.ReadBytes((Int32)paletteLength);
}
#endregion //End ColorModeData
#region "Loading Image Resources"
//This part takes extensive use of classes that I didn't write therefore
//I can't document much on what they do.
Debug.WriteLine("LoadingImageResources started at " + reader.BaseStream.Position.ToString(CultureInfo.InvariantCulture));
_imageResources.Clear();
UInt32 imgResLength = reader.ReadUInt32();
if (imgResLength <= 0) return null;
Int64 startPosition = reader.BaseStream.Position;
while ((reader.BaseStream.Position - startPosition) < imgResLength)
{
ImageResource imgRes = new ImageResource(reader);
ResourceIDs resID = (ResourceIDs)imgRes.ID;
switch (resID)
{
case ResourceIDs.ResolutionInfo:
imgRes = new ResolutionInfo(imgRes);
break;
case ResourceIDs.Thumbnail1:
case ResourceIDs.Thumbnail2:
imgRes = new Thumbnail(imgRes);
break;
case ResourceIDs.AlphaChannelNames:
imgRes = new AlphaChannels(imgRes);
break;
}
_imageResources.Add(imgRes);
}
// make sure we are not on a wrong offset, so set the stream position
// manually
reader.BaseStream.Position = startPosition + imgResLength;
#endregion //End LoadingImageResources
#region "Layer and Mask Info"
//We are gonna load up all the layers and masking of the PSD now.
Debug.WriteLine("LoadLayerAndMaskInfo - Part1 started at " + reader.BaseStream.Position.ToString(CultureInfo.InvariantCulture));
UInt32 layersAndMaskLength = reader.ReadUInt32();
if (layersAndMaskLength <= 0) return null;
//new start position
startPosition = reader.BaseStream.Position;
//Lets start by loading up all the layers
LoadLayers(reader);
//we are done the layers, load up the masks
LoadGlobalLayerMask(reader);
// make sure we are not on a wrong offset, so set the stream position
// manually
reader.BaseStream.Position = startPosition + layersAndMaskLength;
#endregion //End Layer and Mask info
#region "Loading Final Image"
//we have loaded up all the information from the PSD file
//into variables we can use later on.
//lets finish loading the raw data that defines the image
//in the picture.
Debug.WriteLine("LoadImage started at " + reader.BaseStream.Position.ToString(CultureInfo.InvariantCulture));
ImageCompression = (ImageCompression)reader.ReadInt16();
ImageData = new Byte[_channels][];
//---------------------------------------------------------------
if (ImageCompression == ImageCompression.Rle)
{
// The RLE-compressed data is proceeded by a 2-byte data count for each row in the data,
// which we're going to just skip.
reader.BaseStream.Position += _rows * _channels * 2;
}
//---------------------------------------------------------------
Int32 bytesPerRow = 0;
switch (_depth)
{
case 1:
bytesPerRow = _columns;//NOT Shure
break;
case 8:
bytesPerRow = _columns;
break;
case 16:
bytesPerRow = _columns * 2;
break;
}
//---------------------------------------------------------------
for (Int32 ch = 0; ch < _channels; ch++)
{
ImageData[ch] = new Byte[_rows * bytesPerRow];
switch (ImageCompression)
{
case ImageCompression.Raw:
reader.Read(ImageData[ch], 0, ImageData[ch].Length);
break;
case ImageCompression.Rle:
{
for (Int32 i = 0; i < _rows; i++)
{
Int32 rowIndex = i * _columns;
RleHelper.DecodedRow(reader.BaseStream, ImageData[ch], rowIndex, bytesPerRow);
}
}
break;
}
}
#endregion //End LoadingFinalImage
}
return this;
} //end Load()
public Layer(BinaryReverseReader reverseReader, PsdFile psdFile)
{
AdjustmentInfo = new List<AdjusmentLayerInfo>();
SortedChannels = new SortedList<Int16, Channel>();
Channels = new List<Channel>();
Debug.WriteLine("Layer started at " + reverseReader.BaseStream.Position.ToString(CultureInfo.InvariantCulture));
PsdFile = psdFile;
Rectangle localRectangle = new Rectangle
{
Y = reverseReader.ReadInt32(),
X = reverseReader.ReadInt32()
};
localRectangle.Height = reverseReader.ReadInt32() - localRectangle.Y;
localRectangle.Width = reverseReader.ReadInt32() - localRectangle.X;
Rect = localRectangle;
Int32 numberOfChannels = reverseReader.ReadUInt16();
Channels.Clear();
for (Int32 channel = 0; channel < numberOfChannels; channel++)
{
Channel ch = new Channel(reverseReader, this);
Channels.Add(ch);
SortedChannels.Add(ch.ID, ch);
}
String signature = new String(reverseReader.ReadChars(4));
if (signature != "8BIM") throw (new IOException("Layer Channelheader error"));
_blendModeKeyStr = new String(reverseReader.ReadChars(4));
Opacity = reverseReader.ReadByte();
Clipping = reverseReader.ReadByte() > 0;
Byte flags = reverseReader.ReadByte();
_flags = new BitVector32(flags);
reverseReader.ReadByte(); //padding
Debug.WriteLine("Layer extraDataSize started at " + reverseReader.BaseStream.Position.ToString(CultureInfo.InvariantCulture));
// this is the total size of the MaskData, the BlendingRangesData, the
// Name and the AdjustmenLayerInfo
UInt32 extraDataSize = reverseReader.ReadUInt32();
// remember the start position for calculation of the
// AdjustmenLayerInfo size
Int64 extraDataStartPosition = reverseReader.BaseStream.Position;
MaskData = new Mask(reverseReader, this);
BlendingRangesData = new BlendingRanges(reverseReader, this);
Int64 namePosition = reverseReader.BaseStream.Position;
Name = reverseReader.ReadPascalString();
Int32 paddingBytes = (Int32)((reverseReader.BaseStream.Position - namePosition) % 4);
Debug.Print("Layer {0} padding bytes after name", paddingBytes);
reverseReader.ReadBytes(paddingBytes);
AdjustmentInfo.Clear();
Int64 adjustmenLayerEndPos = extraDataStartPosition + extraDataSize;
while (reverseReader.BaseStream.Position < adjustmenLayerEndPos)
{
try
{
AdjustmentInfo.Add(new AdjusmentLayerInfo(reverseReader, this));
}
catch
{
reverseReader.BaseStream.Position = adjustmenLayerEndPos;
}
}
// make shure we are not on a wrong offset, so set the stream position
// manually
reverseReader.BaseStream.Position = adjustmenLayerEndPos;
}