Represents the "Decode" entry of the type 7 shading dictionary object.

It is a required entry defined as part of the PDF 1.0 specification.

It contains an array which contains doubles, representing PDF numeric objects.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; page 198.

The Decode array maps the encoded coordinate and component integers to working values, with the same min/max pair structure as the other mesh shading types.