A soft-mask dictionary, the value of a graphics state's soft mask: a live view over the dictionary.
public sealed class PdfSoftMask
ISO 32000-2 §11.6.5.1, Table 142. The mask's group is painted in the coordinate system of the CTM current at the gs that
set the mask, recorded as SoftMaskMatrix, concatenated with the group's own Matrix.
Properties read the dictionary on every call and fall back to the table's defaults when an entry is absent or malformed; the
content interpreter reports a malformed mask when gs sets it.
kind:method, kind:property, kind:ctor. Press Esc to clear.BackdropGets the backdrop colour components for a luminosity mask, in the group's colour space; null when absent (the space's initial colour, black).DictionaryGets the soft-mask dictionary.GroupGets the transparency group XObject the mask values come from, or null when G is not a stream.ReferenceGets the indirect reference to the dictionary, or null when it is direct.SubtypeGets how the mask values are derived; Luminosity unless S is Alpha.TransferFunctionGets the transfer function applied to the alpha or luminosity, or null for the identity (absent, /Identity, or not a function).