Chapter 1 Introduction to Xlib HP Extensions

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What This Manual Covers
Conventions Used in This Manual

To provide better integration with existing products and peripherals available with HP 9000 computers, a number of extensions have been added to Hewlett-Packard's Xlib software. These extensions add to the existing X standard, creating a superset of functionality:

The XLFD syntax has been extended to allow specifications for increasing or decreasing boldness, changing the slant, mirroring, rotating, and increasing the horizontal size. These extensions apply to scalable typefaces as well as to bitmap fonts. Refer to Chapter 2 “Font Extensions ”.
Multiple error-handling routines for a single process are allowed. Refer to Chapter 3 “Support for Multiple Error Handlers”.
Client programs can disable or enable the key sequence used to reset the X server. Refer to Chapter 4 “Locking an X Display ”.
Two sets of input extensions are included: the "standard" input extensions and HP input extensions. The standard input extensions should be used if possible. Refer to Chapter 5 “X Input Device Extension Functions” for the standard input device extensions and Chapter 6 “HP Input Device Extension Functions” for the HP input device extensions.
HP support of internationalized text is described in Chapter 7 “Internationalization Support ”.
Man pages for the standard extensions and the HP proprietary extensions provide more information about these extensions.




	NOTE: There is some overlap in functionality between the HP proprietory extension protocol requests and the X standard (X11 R5) input extension protocol requests. This is because Hewlett-Packard introduced some capabilities before a standard existed. Hewlett-Packard continues to provide the proprietary extensions for backward compatibility. If either meets your needs, use the X standard capabilities, not the HP extensions. Hewlett-Packard may at some time in future releases discontinue the proprietary extensions.

The HP extensions will work among all networked HP 9000 computers, but may not work with other systems on the same network that are from other vendors or are running earlier versions of X11.

Chapter 1 Introduction to Xlib HP Extensions

Technical documentation

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