The graphics segment

GDDM V3R2 Base Application Programming Guide

The graphics segment

GDDM V3R2 Base Application Programming Guide
SC33-0867-01

A segment is a collection of primitives and their associated attributes. It is not a physical subdivision of the screen. You can put all the primitives in your picture into one segment, or you can divide them into several segments, if that is more convenient.

Segments have attributes determining such characteristics as detectability and visibility. You can set these explicitly with a GSSATI call, or use the default settings. The attributes of an existing segment can be changed with a GSSATS call. Segments can be stored in a library on external storage, and retrieved from it when required.

Creating a graphics segment using GSSEG or specifying attributes for a segment using GSSATI, causes any undefined objects above it in the hierarchy to take default values.

The uses applications can make of graphics segments are described in "Manipulating graphics segments" in topic 9.0. It includes a section on primitives outside segments.

Notices | Terms of use | Support | Contact z/OS