Creating formatted output including GOCA, IOCA, and PTOCA objects

GDDM V3R2 Base Application Programming Guide

Creating formatted output including GOCA, IOCA, and PTOCA objects

GDDM V3R2 Base Application Programming Guide
SC33-0867-01

If the advanced-function printers available to end users of the application are supported by a level of PSF later than version 2.0, you can send a data stream to the print file that is much shorter than the default rastered-image data stream and produces output of a higher quality.

When you open a printer for family-4 output, the device token you specify, affects whether:

Graphics on the current GDDM page can be converted to GOCA graphic drawing orders
Image data on the current page can be converted into IOCA compressed format objects
Alphanumeric text can be converted into PTOCA objects

Depending on which of these formats the current advanced-function printer supports, different mixes of GOCA, IOCA, PTOCA, and rastered image are included in the family-4 print file.

Because many advanced-function printers can process data streams that contain these objects, the quality of the printed output is much better than with rastered-image data stream alone and the data stream is much shorter.

You should endeavor to specify a device token that exploits the capabilities of the printer to process mixed-object data streams. The device token information in the GDDM Base Application Programming Reference book, tells you the level of each format supported for each cell-based AFPDS printer.

Note: You can use processing option 9 to override the default format specified in the device token.

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