Rasterization Accelerator Functions - Intergraph RealiZm Graphics Z10 Hardware User's Manual

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High-Speed Screen Refresh
High-speed screen refresh provides flicker-free displays up to 76 Hz (Z10) or 85 Hz (Z13,
Z25, and V25) for most screen resolutions.
Genlock Support for Dual Monitors
A clock sync cable installed between RealiZm board sets synchronizes the monitors in a dual-
monitor configuration. This Genlock method eliminates the visual beat frequency effect that
may occur when placing two monitors close to each other.

Rasterization Accelerator Functions

Graphics Device Interface (GDI) is the library of functions that the Windows NT operating
system uses to create and manipulate 2D computer images. RealiZm rasterization hardware
accelerates many GDI functions.
OpenGL is an industry standard library of functions used to create and manipulate 3D
computer images. OpenGL functions, as a part of the Windows NT operating system, can be
performed by the host processor. RealiZm hardware accelerators greatly improve OpenGL
performance.
For the Z13, Z25, and V25 accelerators, either the host processor or an optional Geometry
Accelerator performs the geometry stage of the OpenGL processing. While the Geometry
Accelerator processes OpenGL requests, the host processor is freed to perform application and
database operations. This parallel processing results in unprecedented speed to generate and
manipulate realistic images.
As shown in the following figure, the Rasterization Accelerator includes:
u
Pixelization Accelerator
u
Texture Processor (optional)
u
Frame Buffer