DLI Implementation and Reference Guide - Datalogics

8.6 DLI Implementation and Reference Guide
defines how the path defined should be treated (kPDEStroke, kPDEFill,
kPDEEoFill, or a combination of these).
Concepts and Facilities: Guide to the DL Pager Composition System
There are two color definitions within the PDEGraphicState:
• Fill Color will be used with the operators kPDEFill or kPDEEoFill.
• Stroke Color will be used with the operator kPDEStroke.
All of the fields within PDEGraphicState will be honored.
NOTE: Stroking will colorize to a given width, while filling will colorize within the
borders. To draw lines, use stroking to give the line a width.
Functions are provided here to produce commonly-used shapes. The general path
operator dlpdfcontentpath can image arbitrarily complex shapes.
All of the coordinate values and sizes specified below are considered to be in points.
The content element in which these are placed may translate, scale or rotate the
image.
dlpdfcontentclip
This call is used to establish a clipping path. Note that clipping paths are not
established automatically for images, forms, or line drawings. Generally, PDF images
page more efficiently if there is no clipping involved.
A clipping region is considered a part of the content structure, and will be ended at the
end of a content structure. Clipping regions may be nested, but each nested region
must fit within the previous region. A clipping region can, and should, be ended as
soon as possible, using the dlpdfcontentclipend call.
The Path and Pathlen operands of this call are identical to the
dlpdfcontentpath operands. The EOClip operand should be FALSE for a normal
clip and TRUE for an Even/Odd clip.