//////////////////////////////////////////////////////////////////
internal void LoadPixelData(PsdBinaryReader reader)
{
Util.DebugMessage(reader.BaseStream, "Load, Begin, Channel image");
if (Length == 0)
{
ImageCompression = ImageCompression.Raw;
ImageDataRaw = new Byte[0];
return;
}
var endPosition = reader.BaseStream.Position + Length;
ImageCompression = (ImageCompression)reader.ReadInt16();
var longDataLength = Length - 2;
Util.CheckByteArrayLength(longDataLength);
var dataLength = (Int32)longDataLength;
switch (ImageCompression)
{
case ImageCompression.Raw:
ImageDataRaw = reader.ReadBytes(dataLength);
break;
case ImageCompression.Rle:
// RLE row lengths
RleRowLengths = new RleRowLengths(reader, Rect.Height,
Layer.PsdFile.IsLargeDocument);
var rleDataLength = (Int32)(endPosition - reader.BaseStream.Position);
Debug.Assert(rleDataLength == RleRowLengths.Total,
"RLE row lengths do not sum to length of channel image data.");
// The PSD specification states that rows are padded to even sizes.
// However, Photoshop doesn't actually do this. RLE rows can have
// odd lengths in the header, and there is no padding between rows.
ImageDataRaw = reader.ReadBytes(rleDataLength);
break;
case ImageCompression.Zip:
case ImageCompression.ZipPrediction:
ImageDataRaw = reader.ReadBytes(dataLength);
break;
}
Util.DebugMessage(reader.BaseStream, "Load, End, Channel image, {0}",
ID, Layer.Name);
Debug.Assert(reader.BaseStream.Position == endPosition,
"Pixel data was not fully read in.");
}
public RawLayerInfo(PsdBinaryReader reader, String signature, String key,
Int64 dataLength)
{
_signature = signature;
_key = key;
Util.CheckByteArrayLength(dataLength);
Data = reader.ReadBytes((Int32)dataLength);
}
private void LoadColorModeData(PsdBinaryReader reader)
{
Util.DebugMessage(reader.BaseStream, "Load, Begin, ColorModeData");
var paletteLength = reader.ReadUInt32();
if (paletteLength > 0)
{
ColorModeData = reader.ReadBytes((int)paletteLength);
}
Util.DebugMessage(reader.BaseStream, "Load, End, ColorModeData");
}
private void LoadGlobalLayerMask(PsdBinaryReader reader)
{
Util.DebugMessage(reader.BaseStream, "Load, Begin, GlobalLayerMask");
var maskLength = reader.ReadUInt32();
if (maskLength <= 0)
{
Util.DebugMessage(reader.BaseStream, "Load, End, GlobalLayerMask");
return;
}
_globalLayerMaskData = reader.ReadBytes((int)maskLength);
Util.DebugMessage(reader.BaseStream, "Load, End, GlobalLayerMask");
}
///////////////////////////////////////////////////////////////////////////
public BlendingRanges(PsdBinaryReader reader, Layer layer)
{
Util.DebugMessage(reader.BaseStream, "Load, Begin, BlendingRanges");
Layer = layer;
var dataLength = reader.ReadInt32();
if (dataLength <= 0)
{
return;
}
Data = reader.ReadBytes(dataLength);
Util.DebugMessage(reader.BaseStream, "Load, End, BlendingRanges");
}
private void LoadImage(PsdBinaryReader reader)
{
Util.DebugMessage(reader.BaseStream, "Load, Begin, Composite image");
ImageCompression = (ImageCompression)reader.ReadInt16();
// Create channels
for (Int16 i = 0; i < ChannelCount; i++)
{
Util.DebugMessage(reader.BaseStream, "Load, Begin, Channel image data");
var channel = new Channel(i, this.BaseLayer);
channel.ImageCompression = ImageCompression;
channel.Length = this.RowCount
* Util.BytesPerRow(BaseLayer.Rect.Size, BitDepth);
// The composite image stores all RLE headers up-front, rather than
// with each channel.
if (ImageCompression == ImageCompression.Rle)
{
channel.RleRowLengths = new RleRowLengths(reader, RowCount, IsLargeDocument);
channel.Length = channel.RleRowLengths.Total;
}
BaseLayer.Channels.Add(channel);
Util.DebugMessage(reader.BaseStream, "Load, End, Channel image data");
}
foreach (var channel in this.BaseLayer.Channels)
{
Util.DebugMessage(reader.BaseStream, "Load, Begin, Channel image data");
Util.CheckByteArrayLength(channel.Length);
channel.ImageDataRaw = reader.ReadBytes((int)channel.Length);
Util.DebugMessage(reader.BaseStream, "Load, End, Channel image data");
}
// If there is exactly one more channel than we need, then it is the
// alpha channel.
if ((ColorMode != PsdColorMode.Multichannel) &&
(ChannelCount == ColorMode.MinChannelCount() + 1))
{
var alphaChannel = BaseLayer.Channels.Last();
alphaChannel.ID = -1;
}
Util.DebugMessage(reader.BaseStream, "Load, End, Composite image");
}
