AIX Version 4.3 Differences Guide

XIC Value Supported as XIC Value Optional in R6
XNHotKey Yes Optional
XNHotKeyState
XNInputStyle
XNLineSpacing
XNPreeditCallbacks
Yes
Yes
Yes
Yes
XNPreeditState Yes Optional
XNPreeditStateNotifyCallback
Yes
XNResetState Yes Optional
XNResourceClass
XNResourceName
XNStatusCallbacks
Yes
Yes
Yes
XNStringConversion No Optional
XNStringConversionCallback No Optional
8.2.24 X Output Method
Locale-dependent text may include one or more text components, each of which
may require different fonts and character set encodings. In some languages,
each component might have a different drawing direction, and some components
might contain context-dependent characters that change shape based on
relationships with neighboring characters.
When drawing such locale-dependent text, some locale-specific knowledge is
required; for example, what fonts are required to draw the text, how the text can
be separated into components, and which fonts are selected to draw each
component. Furthermore, when bidirectional text must be drawn, the internal
representation order of the text must be changed into the visual representation
order to be drawn. An X Output Method provides a functional interface so that
clients do not have to be aware of locale-dependent details.
Two different abstractions are used in the representation of the output method for
clients:
• The abstraction used to communicate with an output method is an opaque
data structure represented by the XOM datatype.
• The abstraction for representing the state of a particular output thread is
called an output context. The Xlib representation of an output context is an
XOC, which is compatible with XFontSet (see Section 8.2.25.1,
“XLC_FONTSET Category” on page 210) in terms of its functional interface.
8.2.24.1 Output Method Functions
The following are the various output method functions:
• XOpenOM()
• XCloseOM()
• XSetOMValues()
Graphical Environment Enhancements 209