In the retain and draw-and-retain drawing modes, specific GPI functions (primitive-drawing and attribute-setting functions, plus some others) cause graphics orders to be stored in the current segment. A graphics order is a sequence of one or more bytes of data that describe a graphics function. There is typically a one-to-one correspondence between a GPI function and a graphics order. You do not need to understand the various formats and contents of the graphics orders, unless:

Both the graphics orders and the metafile structure are described in the Presentation Manager. This appendix describes the header file PMORD.H, which has been provided to allow you to manipulate the graphics orders more easily.


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