| Class | Description |
|---|---|
| PDFAxialShading | Defines an axial (type 2) shading. Axial shadings define a color blend that varies along a linear axis between two endpoints and extends indefinitely perpendicular to that axis. |
| PDFFunctionShading | Defines a function based (type 1) shading. |
| PDFRadialShading | Defines a radial (type 3) shading. |
| PDFShading |