public VersionInfo(PsdBinaryReader reader, string name)
: base(name)
{
Version = reader.ReadUInt32();
HasRealMergedData = reader.ReadBoolean();
ReaderName = reader.ReadUnicodeString();
WriterName = reader.ReadUnicodeString();
FileVersion = reader.ReadUInt32();
}
public ResolutionInfo(PsdBinaryReader reader, string name)
: base(name)
{
this.HDpi = new UFixed1616(reader.ReadUInt32());
this.HResDisplayUnit = (ResUnit)reader.ReadInt16();
this.WidthDisplayUnit = (Unit)reader.ReadInt16();
this.VDpi = new UFixed1616(reader.ReadUInt32());
this.VResDisplayUnit = (ResUnit)reader.ReadInt16();
this.HeightDisplayUnit = (Unit)reader.ReadInt16();
}
///////////////////////////////////////////////////////////////////////////
private void LoadImageResources(PsdBinaryReader reader)
{
Util.DebugMessage(reader.BaseStream, "Load, Begin, ImageResources");
var imageResourcesLength = reader.ReadUInt32();
if (imageResourcesLength <= 0)
{
return;
}
var startPosition = reader.BaseStream.Position;
var endPosition = startPosition + imageResourcesLength;
while (reader.BaseStream.Position < endPosition)
{
var imageResource = ImageResourceFactory.CreateImageResource(reader);
ImageResources.Add(imageResource);
}
Util.DebugMessage(reader.BaseStream, "Load, End, ImageResources");
//-----------------------------------------------------------------------
// make sure we are not on a wrong offset, so set the stream position
// manually
reader.BaseStream.Position = startPosition + imageResourcesLength;
}
public static ImageResource CreateImageResource(PsdBinaryReader reader)
{
Util.DebugMessage(reader.BaseStream, "Load, Begin, ImageResource");
var signature = reader.ReadAsciiChars(4);
var resourceIdInt = reader.ReadUInt16();
var name = reader.ReadPascalString(2);
var dataLength = (int)reader.ReadUInt32();
var dataPaddedLength = Util.RoundUp(dataLength, 2);
var endPosition = reader.BaseStream.Position + dataPaddedLength;
ImageResource resource = null;
var resourceId = (ResourceID)resourceIdInt;
switch (resourceId)
{
case ResourceID.ResolutionInfo:
resource = new ResolutionInfo(reader, name);
break;
case ResourceID.AlphaChannelNames:
resource = new AlphaChannelNames(reader, name, dataLength);
break;
case ResourceID.UnicodeAlphaNames:
resource = new UnicodeAlphaNames(reader, name, dataLength);
break;
case ResourceID.VersionInfo:
resource = new VersionInfo(reader, name);
break;
default:
resource = new RawImageResource(reader, signature, resourceId, name, dataLength);
break;
}
Util.DebugMessage(reader.BaseStream, "Load, End, ImageResource, {0}",
resourceId);
// Reposition the reader if we do not consume the full resource block.
// This takes care of the even-padding, and also preserves forward-
// compatibility in case a resource block is later extended with
// additional properties.
if (reader.BaseStream.Position < endPosition)
{
reader.BaseStream.Position = endPosition;
}
// However, overruns are definitely an error.
if (reader.BaseStream.Position > endPosition)
{
throw new PsdInvalidException("Corruption detected in resource.");
}
return(resource);
}
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 LoadLayerAndMaskInfo(PsdBinaryReader reader)
{
Util.DebugMessage(reader.BaseStream, "Load, Begin, Layer and mask info");
var layersAndMaskLength = IsLargeDocument
? reader.ReadInt64()
: reader.ReadUInt32();
if (layersAndMaskLength <= 0)
{
return;
}
var startPosition = reader.BaseStream.Position;
var endPosition = startPosition + layersAndMaskLength;
LoadLayers(reader, true);
LoadGlobalLayerMask(reader);
//-----------------------------------------------------------------------
// Load Additional Layer Information
while (reader.BaseStream.Position < endPosition)
{
var info = LayerInfoFactory.Load(reader,
psdFile: this,
globalLayerInfo: true);
AdditionalInfo.Add(info);
if (info is RawLayerInfo)
{
var layerInfo = (RawLayerInfo)info;
switch (info.Key)
{
case "LMsk":
_globalLayerMaskData = layerInfo.Data;
break;
}
}
}
Util.DebugMessage(reader.BaseStream, "Load, End, Layer and mask info");
//-----------------------------------------------------------------------
// make sure we are not on a wrong offset, so set the stream position
// manually
reader.BaseStream.Position = startPosition + layersAndMaskLength;
}
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 MaskInfo(PsdBinaryReader reader, Layer layer)
{
Util.DebugMessage(reader.BaseStream, "Load, Begin, MaskInfo");
var maskLength = reader.ReadUInt32();
if (maskLength <= 0)
{
return;
}
var startPosition = reader.BaseStream.Position;
var endPosition = startPosition + maskLength;
// Read layer mask
var rectangle = reader.ReadRectangle();
var backgroundColor = reader.ReadByte();
var flagsByte = reader.ReadByte();
LayerMask = new Mask(layer, rectangle, backgroundColor, new BitVector32(flagsByte));
// User mask is supplied separately when there is also a vector mask.
if (maskLength == 36)
{
var userFlagsByte = reader.ReadByte();
var userBackgroundColor = reader.ReadByte();
var userRectangle = reader.ReadRectangle();
UserMask = new Mask(layer, userRectangle, userBackgroundColor,
new BitVector32(userFlagsByte));
}
// 20-byte mask data will end with padding.
reader.BaseStream.Position = endPosition;
Util.DebugMessage(reader.BaseStream, "Load, End, MaskInfo");
}
///////////////////////////////////////////////////////////////////////////
/// <summary>
/// Load Layers Info section, including image data.
/// </summary>
/// <param name="reader">PSD reader.</param>
/// <param name="hasHeader">Whether the Layers Info section has a length header.</param>
internal void LoadLayers(PsdBinaryReader reader, bool hasHeader)
{
Util.DebugMessage(reader.BaseStream, "Load, Begin, Layers Info section");
long sectionLength = 0;
if (hasHeader)
{
sectionLength = IsLargeDocument
? reader.ReadInt64()
: reader.ReadUInt32();
if (sectionLength <= 0)
{
// The callback may take action when there are 0 layers, so it must
// be called even though the Layers Info section is empty.
LoadContext.OnLoadLayersHeader(this);
Util.DebugMessage(reader.BaseStream, "Load, End, Layers Info section");
return;
}
}
var startPosition = reader.BaseStream.Position;
var numLayers = reader.ReadInt16();
// If numLayers < 0, then number of layers is absolute value,
// and the first alpha channel contains the transparency data for
// the merged result.
if (numLayers < 0)
{
AbsoluteAlpha = true;
numLayers = Math.Abs(numLayers);
}
for (int i = 0; i < numLayers; i++)
{
var layer = new Layer(reader, this);
Layers.Add(layer);
}
// Header is complete just before loading pixel data
LoadContext.OnLoadLayersHeader(this);
//-----------------------------------------------------------------------
// Load image data for all channels.
foreach (var layer in Layers)
{
Util.DebugMessage(reader.BaseStream,
$"Load, Begin, Layer image, {layer.Name}");
foreach (var channel in layer.Channels)
{
channel.LoadPixelData(reader);
}
Util.DebugMessage(reader.BaseStream,
$"Load, End, Layer image, {layer.Name}");
}
// Length is set to 0 when called on higher bitdepth layers.
if (sectionLength > 0)
{
// Layers Info section is documented to be even-padded, but Photoshop
// actually pads to 4 bytes.
var endPosition = startPosition + sectionLength;
var positionOffset = reader.BaseStream.Position - endPosition;
Debug.Assert(positionOffset > -4,
"LoadLayers did not read the full length of the Layers Info section.");
Debug.Assert(positionOffset <= 0,
"LoadLayers read past the end of the Layers Info section.");
if (reader.BaseStream.Position < endPosition)
{
reader.BaseStream.Position = endPosition;
}
}
Util.DebugMessage(reader.BaseStream, "Load, End, Layers");
}
public Layer(PsdBinaryReader reader, PsdFile psdFile)
: this(psdFile)
{
Util.DebugMessage(reader.BaseStream, "Load, Begin, Layer");
Rect = reader.ReadRectangle();
//-----------------------------------------------------------------------
// Read channel headers. Image data comes later, after the layer header.
Int32 numberOfChannels = reader.ReadUInt16();
for (Int32 channel = 0; channel < numberOfChannels; channel++)
{
var ch = new Channel(reader, this);
Channels.Add(ch);
}
//-----------------------------------------------------------------------
//
var signature = reader.ReadAsciiChars(4);
if (signature != "8BIM")
{
throw (new PsdInvalidException("Invalid signature in layer header."));
}
BlendModeKey = reader.ReadAsciiChars(4);
Opacity = reader.ReadByte();
Clipping = reader.ReadBoolean();
var flagsByte = reader.ReadByte();
_flags = new BitVector32(flagsByte);
reader.ReadByte(); //padding
//-----------------------------------------------------------------------
// This is the total size of the MaskData, the BlendingRangesData, the
// Name and the AdjustmentLayerInfo.
var extraDataSize = reader.ReadUInt32();
var extraDataStartPosition = reader.BaseStream.Position;
Masks = new MaskInfo(reader, this);
BlendingRangesData = new BlendingRanges(reader, this);
Name = reader.ReadPascalString(4);
//-----------------------------------------------------------------------
// Process Additional Layer Information
Int64 adjustmentLayerEndPos = extraDataStartPosition + extraDataSize;
while (reader.BaseStream.Position < adjustmentLayerEndPos)
{
var layerInfo = LayerInfoFactory.Load(reader,
psdFile: PsdFile,
globalLayerInfo: false);
AdditionalInfo.Add(layerInfo);
}
foreach (var adjustmentInfo in AdditionalInfo)
{
switch (adjustmentInfo.Key)
{
case "luni":
Name = ((LayerUnicodeName)adjustmentInfo).Name;
break;
}
}
Util.DebugMessage(reader.BaseStream, "Load, End, Layer, {0}", Name);
PsdFile.LoadContext.OnLoadLayerHeader(this);
}
