public static Layer MakeImageLayer(this PsdFile psd, Bitmap bmp, string name, int x = 0, int y = 0)
{
Layer psdLayer = new Layer(psd);
// Set layer metadata
psdLayer.Name = name;
psdLayer.Rect = new Rectangle(new Point(x, y), bmp.Size);
psdLayer.BlendModeKey = PsdBlendMode.Normal;
psdLayer.Opacity = 255;
psdLayer.Visible = true;
psdLayer.Masks = new MaskInfo();
psdLayer.BlendingRangesData = new BlendingRanges(psdLayer);
psdLayer.SetBitmap(bmp, ImageReplaceOption.KeepCenter, psd.ImageCompression);
return(psdLayer);
}
public InfoLayers(PsdFile psdFile, string key)
{
PsdFile = psdFile;
switch (key)
{
// The key does not have to match the bit depth, but it does have to
// be one of the known values.
case "Layr":
case "Lr16":
case "Lr32":
this.key = key;
break;
default:
throw new PsdInvalidException(
$"{nameof(InfoLayers)} key must be Layr, Lr16, or Lr32.");
}
}
public InfoLayers(PsdBinaryReader reader, PsdFile psdFile,
string key, long dataLength)
: this(psdFile, key)
{
if (psdFile.Layers.Count > 0)
{
throw new PsdInvalidException(
"Cannot have both regular layers and Additional Info layers");
}
var endPosition = reader.BaseStream.Position + dataLength;
psdFile.LoadLayers(reader, false);
if (reader.BaseStream.Position != endPosition)
{
throw new PsdInvalidException(
$"Incorrect length for {nameof(InfoLayers)}.");
}
}
public static Layer MakeSectionLayers(this PsdFile psd, string name, out Layer dividerLayer, bool isOpen = false)
{
Layer headLayer = new Layer(psd)
{
Name = name,
Rect = new Rectangle(),
BlendModeKey = PsdBlendMode.Normal,
Opacity = 255,
Visible = true,
Masks = new MaskInfo()
};
// Set layer metadata
headLayer.BlendingRangesData = new BlendingRanges(headLayer);
headLayer.AdditionalInfo.Add(new LayerSectionInfo()
{
SectionType = isOpen ? LayerSectionType.OpenFolder : LayerSectionType.ClosedFolder
});
dividerLayer = new Layer(psd)
{
Name = LayerGroupDivider,
Rect = new Rectangle(),
BlendModeKey = PsdBlendMode.Normal,
Opacity = 255,
Visible = true,
Masks = new MaskInfo(),
BlendingRangesData = new BlendingRanges(headLayer)
};
// Set layer metadata
dividerLayer.AdditionalInfo.Add(new LayerSectionInfo()
{
SectionType = LayerSectionType.SectionDivider
});
return(headLayer);
}
public virtual void OnLoadLayersHeader(PsdFile psdFile)
{
}
/// <summary>
/// Loads the next LayerInfo record.
/// </summary>
/// <param name="reader">The file reader</param>
/// <param name="psdFile">The PSD file.</param>
/// <param name="globalLayerInfo">True if the LayerInfo record is being
/// loaded from the end of the Layer and Mask Information section;
/// false if it is being loaded from the end of a Layer record.</param>
public static LayerInfo Load(PsdBinaryReader reader, PsdFile psdFile,
bool globalLayerInfo)
{
Util.DebugMessage(reader.BaseStream, "Load, Begin, LayerInfo");
// Some keys use a signature of 8B64, but the identity of these keys
// is undocumented. We will therefore accept either signature.
var signature = reader.ReadAsciiChars(4);
if ((signature != "8BIM") && (signature != "8B64"))
{
throw new PsdInvalidException(
$"{nameof(LayerInfo)} signature invalid, must be 8BIM or 8B64.");
}
var key = reader.ReadAsciiChars(4);
var hasLongLength = LayerInfoUtil.HasLongLength(key, psdFile.IsLargeDocument);
var length = hasLongLength
? reader.ReadInt64()
: reader.ReadInt32();
var startPosition = reader.BaseStream.Position;
LayerInfo result;
switch (key)
{
case "Layr":
case "Lr16":
case "Lr32":
result = new InfoLayers(reader, psdFile, key, length);
break;
case "lsct":
case "lsdk":
result = new LayerSectionInfo(reader, key, (int)length);
break;
case "luni":
result = new LayerUnicodeName(reader);
break;
default:
result = new RawLayerInfo(reader, signature, key, length);
break;
}
// May have additional padding applied.
var endPosition = startPosition + length;
if (reader.BaseStream.Position < endPosition)
{
reader.BaseStream.Position = endPosition;
}
// Documentation states that the length is even-padded. Actually:
// 1. Most keys have 4-padded lengths.
// 2. However, some keys (LMsk) have even-padded lengths.
// 3. Other keys (Txt2, Lr16, Lr32) have unpadded lengths.
//
// Photoshop writes data that is always 4-padded, even when the stated
// length is not a multiple of 4. The length mismatch seems to occur
// only on global layer info. We do not read extra padding in other
// cases because third-party programs are likely to follow the spec.
if (globalLayerInfo)
{
reader.ReadPadding(startPosition, 4);
}
Util.DebugMessage(reader.BaseStream,
$"Load, End, LayerInfo, {result.Signature}, {result.Key}");
return(result);
}
