PdfDrawingSurface Class

PdfDrawingSurface is an abstract class that defines the drawing operations that can be performed on PDF page or other PDF content item. In this model, there is a notion of current path. A path a set of possibly disjoint lines or curves. A path or any of its sub paths may be closed open. An existing path may have more paths added to it. When any of the painting operations are performed, the current path will be cleared - unless the user performs a GSave operation in the containing PdfPageRenderer object before painting. Paths may be stroked, painted, painted and stroked, or clipped. Clipping is cumulative. Clipping to a path can only reduce the current clipping region or keep it the same size. Use GSave/GRestore to make temporary changes to the clipping region. In addition, a tranformation matrix may be applied to the drawing surface that will be incorporated into the current transformation. Transformations are cumulative and will affect all subsequent drawing unless managed with a GSave/Grestore operation. Before any operations can be performed on a PdfDrawingSurface, client code is required to call Begin. Client code should also call End when done. Begin and End are very efficient operations.

public abstract class PdfDrawingSurface

Public MustInherit Class PdfDrawingSurface