DLI Implementation and Reference Guide - Datalogics

10.2. DLI Implementation and Reference Guide
Overview
Concepts and Facilities: Guide to the DL Pager Composition System
This chapter contains calls used to draw lines within an area, and fill or stroke those
lines while producing commonly-used shapes. Common to all of these calls is the
PDEGraphicState, which defines line drawing parameters (Line Width, Join,
Miter, etc.) and the Paint operator, which defines how the path defined should be
treated (kPDEStroke, kPDEFill, kPDEEoFill, or a combination of these).
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 in this chapter to produce commonly-used shapes. The general
path operator dlpdfcontentpath can image arbitrarily complex shapes.
All of the coordinates 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.