Combining an image with text or graphics

GDDM V3R2 Base Application Programming Guide

Combining an image with text or graphics

GDDM V3R2 Base Application Programming Guide
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"Hierarchy of GDDM concepts" in topic 7.0 introduced the concept of an image field similar to a graphics field. In addition, several sections in this topic, "Image basics" in topic 6.0 described the use of image identifier 0 to refer to the image field on the current GDDM page, assuming such a field exists.

Only one image field can exist per page, and as for a graphics field, it can be created explicitly or by default. Usually you let GDDM create the image field for you. If, however, you want the image field to extend over only part of the page, you must create one explicitly. The most likely reason for doing this is to share the page between image and alphanumerics or graphics.

Like alphanumeric and graphics fields, an image field is defined in page row and column coordinates.

The image field and alphanumeric field(s) can overlap, just as graphics and alphanumerics can overlap. However, image and graphics fields can coexist on the same page only if they do not overlap.

Where a device does not accept image data streams, GDDM supports image processing by internally using graphics calls (emulation), and this can be done only if there are no graphics on the same page. If there is a graphics field on the page, GDDM displays or prints its contents in preference to those of the image field.

You can, however, display a graphics field and an image field at the same time, on family-1 display devices other than the 3193, by placing the fields in separate partitions.

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