Creates a DeviceN colour space whose colourants look like alternateColors at full tint, or returns the one
this document already has for the same values.
public PdfDeviceNColorSpace CreateDeviceNColorSpace(IReadOnlyList<string> colorants, IReadOnlyList<PdfColor> alternateColors)
The colourants' names, in component order: different from each other except None; 1 to 32 of them.
For each colourant, the colour its full tint is shown as where it is not available; all in one space, which is the alternate: a device space, CalGray, CalRGB or a gray, RGB or CMYK ICCBased space.
[/DeviceN [names] alternate tintTransform], an indirect array.ISO 32000-2 §8.6.6.5 (PDF 1.3). The tint transform is written as a PostScript calculator function (§7.10.5, Type 4, PDF 1.3) that mixes the colourants' alternate colours: for CMYK, each component is the sum of the tints times the colourants' components, at most 1; for an additive alternate, 1 minus the sum of the tints times what each colourant takes away from white, at least 0. Records PDF 1.3. A mutation.