Creates an axial shading (Type 2) coloured by a function of the caller's along the line from start to end.
public PdfAxialShading CreateAxialShading(PdfColorSpace colorSpace, PathPoint start, PathPoint end, PdfFunction function)
The shading's colour space: a space of this document, not Pattern or Indexed.
The point where the function's domain starts (t0).
The point where it ends (t1); not start.
A function of this document from one input to the colour space's components; its domain is the shading's Domain.
ISO 32000-2 §8.7.4.5.3, Table 79 (PDF 1.3). Records PDF 1.3 and the function's version. A mutation.