GDI Simulation Routines and Device Drivers for Windows

 Last reviewed: July 22, 1997
Article ID: Q10834
3.00 3.10 WINDOWS kbprg

The information in this article applies to:

  • Microsoft Windows Software Development Kit (SDK) for Windows, versions 3.0 and 3.1

The following information concerns GDI's simulation routines for device drivers:

GDI discards its simulation routines when more intelligent drivers provide the required information. GDI is demand-loadable and discardable. When a smart driver registers its capabilities with GDI, GDI dumps the simulation routines that it uses for less intelligent display drivers. For example, when writing a driver that can handle all the OUTPUT functions, GDI will avoid loading all the simulation routines.

In addition, GDI's simulation routines are optimized. However, it is usually the case that device drivers can complete output functions a lot faster because no GDI object or memory must be allocated during the operations, and device drivers can deal directly with the hardware device.

Additional reference words: 3.00 3.10
KBCategory: kbprg
KBSubcategory: GdiDisplay
Keywords : kb16bitonly

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Last reviewed: July 22, 1997
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