internal void LoadPixelData(BinaryReverseReader reader)
{
Debug.WriteLine("Channel.LoadPixelData started at " + reader.BaseStream.Position.ToString());
m_data = reader.ReadBytes((int)Length);
using (BinaryReverseReader readerImg = DataReader)
{
m_imageCompression = (ImageCompression)readerImg.ReadInt16();
int bytesPerRow = 0;
switch (m_layer.PsdFile.Depth)
{
case 1:
bytesPerRow = m_layer.m_rect.Width; //NOT Shure
break;
case 8:
bytesPerRow = m_layer.m_rect.Width;
break;
case 16:
bytesPerRow = m_layer.m_rect.Width * 2;
break;
}
m_imageData = new byte[m_layer.m_rect.Height * bytesPerRow];
switch (m_imageCompression)
{
case ImageCompression.Raw:
readerImg.Read(m_imageData, 0, m_imageData.Length);
break;
case ImageCompression.Rle:
{
int[] rowLenghtList = new int[m_layer.m_rect.Height];
for (int i = 0; i < rowLenghtList.Length; i++)
{
rowLenghtList[i] = readerImg.ReadInt16();
}
for (int i = 0; i < m_layer.m_rect.Height; i++)
{
int rowIndex = i * m_layer.m_rect.Width;
RleHelper.DecodedRow(readerImg.BaseStream, m_imageData, rowIndex, bytesPerRow);
//if (rowLenghtList[i] % 2 == 1)
// readerImg.ReadByte();
}
}
break;
default:
break;
}
}
}
public void 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());
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 ((m_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.
m_channels = reader.ReadInt16();
m_rows = reader.ReadInt32();
m_columns = reader.ReadInt32();
m_depth = reader.ReadInt16();
m_colorMode = (ColorModes)reader.ReadInt16();
//by end of headers, the reader has read 26 bytes into the file.
#endregion //End Headers
#region "ColorModeData"
/// <summary>
/// If ColorMode is ColorModes.Indexed, the following 768 bytes will contain
/// a 256-color palette. If the ColorMode is ColorModes.Duotone, the data
/// following presumably consists of screen parameters and other related information.
/// Unfortunately, it is intentionally not documented by Adobe, and non-Photoshop
/// readers are advised to treat duotone images as gray-scale images.
/// </summary>
Debug.WriteLine("LoadColorModeData started at " + reader.BaseStream.Position.ToString());
uint paletteLength = reader.ReadUInt32(); //readUint32() advances the reader 4 bytes.
if (paletteLength > 0)
{
ColorModeData = reader.ReadBytes((int)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());
m_imageResources.Clear();
uint imgResLength = reader.ReadUInt32();
if (imgResLength <= 0)
{
return;
}
long 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;
}
m_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());
uint layersAndMaskLength = reader.ReadUInt32();
if (layersAndMaskLength <= 0)
{
return;
}
//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());
m_imageCompression = (ImageCompression)reader.ReadInt16();
m_imageData = new byte[m_channels][];
//---------------------------------------------------------------
if (m_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 += m_rows * m_channels * 2;
}
//---------------------------------------------------------------
int bytesPerRow = 0;
switch (m_depth)
{
case 1:
bytesPerRow = m_columns; //NOT Shure
break;
case 8:
bytesPerRow = m_columns;
break;
case 16:
bytesPerRow = m_columns * 2;
break;
}
//---------------------------------------------------------------
for (int ch = 0; ch < m_channels; ch++)
{
m_imageData[ch] = new byte[m_rows * bytesPerRow];
switch (m_imageCompression)
{
case ImageCompression.Raw:
reader.Read(m_imageData[ch], 0, m_imageData[ch].Length);
break;
case ImageCompression.Rle: {
for (int i = 0; i < m_rows; i++)
{
int rowIndex = i * m_columns;
RleHelper.DecodedRow(reader.BaseStream, m_imageData[ch], rowIndex, bytesPerRow);
}
}
break;
default:
break;
}
}
#endregion //End LoadingFinalImage
}
} //end Load()
internal void LoadPixelData(BinaryReverseReader reader)
{
Debug.WriteLine("Mask.LoadPixelData started at " + reader.BaseStream.Position.ToString());
if (m_rect.IsEmpty || m_layer.SortedChannels.ContainsKey(-2) == false)
{
return;
}
Channel maskChannel = m_layer.SortedChannels[-2];
maskChannel.Data = reader.ReadBytes((int)maskChannel.Length);
using (BinaryReverseReader readerImg = maskChannel.DataReader)
{
maskChannel.ImageCompression = (ImageCompression)readerImg.ReadInt16();
int bytesPerRow = 0;
switch (m_layer.PsdFile.Depth)
{
case 1:
bytesPerRow = m_rect.Width; //NOT Shure
break;
case 8:
bytesPerRow = m_rect.Width;
break;
case 16:
bytesPerRow = m_rect.Width * 2;
break;
}
maskChannel.ImageData = new byte[m_rect.Height * bytesPerRow];
// Fill Array
for (int i = 0; i < maskChannel.ImageData.Length; i++)
{
maskChannel.ImageData[i] = 0xAB;
}
m_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[m_rect.Height];
for (int i = 0; i < rowLenghtList.Length; i++)
{
rowLenghtList[i] = readerImg.ReadInt16();
}
for (int i = 0; i < m_rect.Height; i++)
{
int rowIndex = i * m_rect.Width;
RleHelper.DecodedRow(readerImg.BaseStream, maskChannel.ImageData, rowIndex, bytesPerRow);
}
}
break;
default:
break;
}
m_imageData = (byte[])maskChannel.ImageData.Clone();
}
}
private void CompressImageData()
{
if (m_imageCompression == ImageCompression.Rle)
{
MemoryStream dataStream = new MemoryStream();
BinaryReverseWriter writer = new BinaryReverseWriter(dataStream);
// we will write the correct lengths later, so remember
// the position
long lengthPosition = writer.BaseStream.Position;
int[] rleRowLenghs = new int[m_layer.m_rect.Height];
if (m_imageCompression == ImageCompression.Rle)
{
for (int i = 0; i < rleRowLenghs.Length; i++)
{
writer.Write((short)0x1234);
}
}
//---------------------------------------------------------------
int bytesPerRow = 0;
switch (m_layer.PsdFile.Depth)
{
case 1:
bytesPerRow = m_layer.m_rect.Width; //NOT Shure
break;
case 8:
bytesPerRow = m_layer.m_rect.Width;
break;
case 16:
bytesPerRow = m_layer.m_rect.Width * 2;
break;
}
//---------------------------------------------------------------
for (int row = 0; row < m_layer.m_rect.Height; row++)
{
int rowIndex = row * m_layer.m_rect.Width;
rleRowLenghs[row] = RleHelper.EncodedRow(writer.BaseStream, m_imageData, rowIndex, bytesPerRow);
}
//---------------------------------------------------------------
long endPosition = writer.BaseStream.Position;
writer.BaseStream.Position = lengthPosition;
for (int i = 0; i < rleRowLenghs.Length; i++)
{
writer.Write((short)rleRowLenghs[i]);
}
writer.BaseStream.Position = endPosition;
dataStream.Close();
m_data = dataStream.ToArray();
dataStream.Dispose();
}
else
{
m_data = (byte[])m_imageData.Clone();
}
}
