## Presentation Device Driver Reference for OS/2

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### Coordinates

All coordinates are passed as signed 32-bit values unless stated otherwise. World, model, and presentation-page space coordinates are restricted to the 28 low-order bits and lie within the range F8000000h through 07FFFFFFh. Device space coordinates are restricted to the 16 low-order bits and lie within the range FFFF0000h through 0000FFFFh.