internal void LoadPixelData(BinaryReverseReader reverseReader)
{
Debug.WriteLine("Channel.LoadPixelData started at " + reverseReader.BaseStream.Position.ToString(CultureInfo.InvariantCulture));
Data = reverseReader.ReadBytes(Length);
using (BinaryReverseReader imageReader = DataReader)
{
ImageCompression = (ImageCompression)imageReader.ReadInt16();
Int32 bytesPerRow = 0;
switch (Layer.PsdFile.Depth)
{
case 1:
bytesPerRow = Layer.Rect.Width; //NOT sure
break;
case 8:
bytesPerRow = Layer.Rect.Width;
break;
case 16:
bytesPerRow = Layer.Rect.Width * 2;
break;
}
ImageData = new Byte[Layer.Rect.Height * bytesPerRow];
switch (ImageCompression)
{
case ImageCompression.Raw:
imageReader.Read(ImageData, 0, ImageData.Length);
break;
case ImageCompression.Rle:
{
Int32[] rowLengthList = new Int32[Layer.Rect.Height];
for (Int32 i = 0; i < rowLengthList.Length; i++)
{
rowLengthList[i] = imageReader.ReadInt16();
}
for (Int32 i = 0; i < Layer.Rect.Height; i++)
{
Int32 rowIndex = i * Layer.Rect.Width;
RleHelper.DecodedRow(imageReader.BaseStream, ImageData, rowIndex, bytesPerRow);
//if (rowLenghtList[i] % 2 == 1)
// readerImg.ReadByte();
}
}
break;
}
}
}
public PsdFile Load(Stream stream)
{
//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()
internal void LoadPixelData(BinaryReverseReader reader)
{
Debug.WriteLine("Mask.LoadPixelData started at " + reader.BaseStream.Position.ToString(CultureInfo.InvariantCulture));
if (Rect.IsEmpty || Layer.SortedChannels.ContainsKey(-2) == false)
{
return;
}
Channel maskChannel = Layer.SortedChannels[-2];
maskChannel.Data = reader.ReadBytes(maskChannel.Length);
using (BinaryReverseReader readerImg = maskChannel.DataReader)
{
maskChannel.ImageCompression = (ImageCompression)readerImg.ReadInt16();
int bytesPerRow = 0;
switch (Layer.PsdFile.Depth)
{
case 1:
bytesPerRow = Rect.Width; //NOT Shure
break;
case 8:
bytesPerRow = Rect.Width;
break;
case 16:
bytesPerRow = Rect.Width * 2;
break;
}
maskChannel.ImageData = new byte[Rect.Height * bytesPerRow];
// Fill Array
for (int i = 0; i < maskChannel.ImageData.Length; i++)
{
maskChannel.ImageData[i] = 0xAB;
}
ImageData = (byte[])maskChannel.ImageData.Clone();
switch (maskChannel.ImageCompression)
{
case ImageCompression.Raw:
readerImg.Read(maskChannel.ImageData, 0, maskChannel.ImageData.Length);
break;
case ImageCompression.Rle:
{
int[] rowLenghtList = new int[Rect.Height];
for (int i = 0; i < rowLenghtList.Length; i++)
{
rowLenghtList[i] = readerImg.ReadInt16();
}
for (int i = 0; i < Rect.Height; i++)
{
int rowIndex = i * Rect.Width;
RleHelper.DecodedRow(readerImg.BaseStream, maskChannel.ImageData, rowIndex, bytesPerRow);
}
}
break;
}
ImageData = (byte[])maskChannel.ImageData.Clone();
}
}