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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>bkgrnd</title></head><body bgcolor=white><center><font size=2>The Single UNIX ® Specification, Version 2<br>Copyright © 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_002_001_406"> </a>NAME</h4><blockquote>bkgrnd, bkgrndset, getbkgrnd, wbkgrnd, wbkgrndset, wgetbkgrnd- turn offthe previous background attributes, OR the requested attributesinto the window rendition, andset or get background character and rendition using a complex character</blockquote><h4><a name = "tag_002_001_407"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <<a href="curses.h.html">curses.h</a>>int bkgrnd(const cchar_t *<i>wch</i>);void bkgrndset(const cchar_t *<i>wch</i>);int getbkgrnd(cchar_t *<i>wch</i>);int wbkgrnd(WINDOW *<i>win</i>, const cchar_t *<i>wch</i>);void wbkgrndset(WINDOW *<i>win</i>, const cchar_t *<i>wch</i>);int wgetbkgrnd(WINDOW *<i>win</i>, cchar_t *<i>wch</i>);</code></pre></blockquote><h4><a name = "tag_002_001_408"> </a>DESCRIPTION</h4><blockquote>The<i>bkgrndset()</i>and<i>wbkgrndset()</i>functions turn offthe previous background attributes, OR the requested attributesinto the window rendition, andset the background property of the current or specified windowbased on the information in <i>wch</i>.<p>The<i>bkgrnd()</i>and<i>wbkgrnd()</i>functions turn offthe previous background attributes, OR the requested attributesinto the window rendition, andset the background property of the current or specified window andthen apply this setting to every character position in that window:<ul><p><li>The rendition of every character on the screen is changed to the newwindow rendition.<p><li>Wherever the former background character appears, it is changed to the newbackground character.<p></ul><p>If <i>wch</i> refers to a non-spacing complex character for<i>bkgrnd()</i>,<i>bkgrndset()</i>,<i>wbkgrnd()</i>and<i>wbkgrndset()</i>,then <i>wch</i> is added to theexisting spacing complex character that is the background character.If <i>wch</i> refers to a multi-column character, the results are unspecified.<p>The<i><a href="getbkgrnd.html">getbkgrnd()</a></i>and<i>wgetbkgrnd()</i>functions store, into the area pointed to by <i>wch</i>, the value of thewindow's background character and rendition.</blockquote><h4><a name = "tag_002_001_409"> </a>RETURN VALUE</h4><blockquote>The<i>bkgrndset()</i>and<i>wbkgrndset()</i>functions do not return a value.<p>Upon successful completion, the other functions return OK.Otherwise, they return ERR.</blockquote><h4><a name = "tag_002_001_410"> </a>ERRORS</h4><blockquote>No errors are defined.</blockquote><h4><a name = "tag_002_001_411"> </a>SEE ALSO</h4><blockquote><xref href=rendnew><a href="intov.html#tag_001_003_004">Rendition</a></xref>,<i><a href="curses.h.html"><curses.h></a></i>.</blockquote><hr size=2 noshade><center><font size=2>UNIX ® is a registered Trademark of The Open Group.<br>Copyright © 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>⌨️ 快捷键说明
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